Characteristic Study for Integration of Fixed and Variable Speed Wind Turbines into Transmission Grid

Size: px
Start display at page:

Download "Characteristic Study for Integration of Fixed and Variable Speed Wind Turbines into Transmission Grid"

Transcription

1 Characteristic Study for Integration of Fixed and Variable Speed Wind Turbines into Transmission Grid Shuhui Li 1, Tim Haskew 1, R. Challoo 1 Department of Electrical and Computer Engineering The University of Alabama Tuscaloosa, AL Presented at

2 Wind Energy A Fast Growing Energy Source in Texas Over MW DFIG wind turbines for each wind farm

3 The Wind Turbine

4 Inside the Wind Turbine Fixed-speed Induction Generator Double-Fed Induction Generator

5 Fixed and Variable Speed Induction Generator Wind Turbines ω slip Rotor-side converter Fixed-speed IG wind turbines Relatively simple and robust Low energy yield Large mechanical loads Lack of control possibilities of both active and reactive power. Large fluctuations in output power Variable-speed DFIG wind turbines A higher energy yield. Reduction of mechanical loads. Extensive controllability of both active and reactive power. Easier comply with the requirements of grid companies. Less fluctuations in output power.

6 Integration of Wind Turbines into Transmission Grid A cluster of wind turbines Turbine distribution transformer The point of common coupling (PCC). PCC transmission transformer Transmission line Grid transformer The grid PCC Zs A very large grid

7 Issues for Grid Integration of DFIG Wind Turbines What are the DFIG characteristics compared to those of fixed-speed IGs? How DFIG characteristics and controls are affected as more turbines are added online? Will a parallel compensation improve DFIG controls and characteristics? How about a series compensation? What are the differences between a wind farm using variable-speed DFIGs and fixed-speed IGs? What are the integrative characteristics for both situations?

8 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

9 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

10 Induction Machine Transient Model in d-q d q Frame d-q representation (three equations): Stator voltage equation: Rotor voltage equation: Flux linkage equation: Space vector representation: vsd isd d λsd 0 1 λsq = Rs + + ωsyn vsq isq dt λ sq 1 0 λsd vrd ird d λsd 0 1 λsd = Rr + + ωr vrq irq dt λ sq 1 0 λsq λsd Ls 0 Lm 0 isd λ rq 0 Ls 0 L i m sq = λ sd Lm 0 Lr 0 i rd λrq 0 Lm 0 L i r rq r vr_ dq= vrd+ jvrq injected rotor (control) voltage r r d r v Ri j dt λ r r Rotor voltage equation: v = r d r _ dq Ri + r r r _ dq r _ dq j slip r _ dq dt λ + ω r λ ( ) Stator voltage equation: = + + ω λ s _ dq s s _ dq s _ dq syn s _ dq

11 From Transient to Steady-State State Model Steady-state space vector voltage equations: r r d r v Ri j dt λ r r d Rotor voltage equation: v = r r _ dq Ri + r r r _ dq r _ dq j slip r _ dq dt λ + ω r λ Stator voltage equation: = + + ω λ s _ dq s s _ dq s _ dq syn s _ dq Replace flux linkage using stator/rotor currents: Steady-state d-q equivalent circuit: r r r r r ( ) Stator steady-state voltage equation: V s _ dq = RI s s _ dq + jω s L ls I s _ dq + jω s L m I s _ dq + I r _ dq Rotor steady-state voltage equation: Stator power + Vs_dq Is_dq Rs Lls 1 2 r V r_ dq r = R I r_ dq+ j ω L I s lr r_ dq+ j ω L I I s m s_ dq+ r_ dq Lm s 1 + s Ir_dq Ems_dq r r r r Llr 1 2 Rr Rr(1-s)/s Vr_dq ( ) Rotor power Vr_dq(1-s)/s

12 Transmission System Models in d-q d q Frame Three-phase voltage balance equation: d-q voltage balance equation: Space vector equation: vag ia ia vaf d vbg Ri b L i = + b + v bf dt vc g ic ic vc f { { Grid voltage PCC voltage vdg id d id iq df R L v ωsl v = qg i + q dt i + + q i v d qf { { Grid dq voltage PCC dq voltage d v r = Ri r + L i r + jω Li r + v r dt dq _ g dq dq s dq dq _ f Steady-state d-q equation: r r r r n r r Vdq _ g = RI dq + jωs L Idq + Vdq _ f = ( R+ jωs L) Idq _ i + V { Z S i= 1 turbine current dq _ f

13 Integrated Wind Farm and Grid Steady-State State Equivalent Circuit in d-q d q Frame R Vdq_g L Vdq_f PCC + Is_dq Vs_dq Rs Lls 1 2 Lm 1 Ir_dq + Ems_dq Llr 1 2 Rr Rr(1-s)/s Vr_dq - - Zs 2 - A very large grid Vr_dq(1-s)/s PCC Voltage Wind turbines transformation are identical from high-voltage and use fixed-speed side to low-voltage induction machines. side; Current Wind speeds transformation at the wind from farm generator are uniform. terminal All to wind the line; turbines have the same operating condition. Sum of generator current representing the total current for all the wind turbines; The line impedance between each turbine and the PCC is neglected.

14 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

15 Simulation Mechanism for Characteristic Study Based upon the DFIG steady-state model and equivalent circuit Grid voltage: constant voltage at 1p.u. for all simulation r case V = + j ( dq _ g 1 0) Rotor injected voltage: control voltage from rotor-side converter variable for each simulation case study r V = V + jv ( ) dq _ r rd rq Characteristics: versus slip obtained for each rotor voltage control condition

16 Typical Characteristics of Fixed-Speed IG V 1 = 0.96, 0.83, 0.71, and 0.58p.u 3 2 Motoring 1 Is_dq + Vs_dq - Rs Lls 1 2 Lm 1 2 Ir_dq + Ems_dq - Llr 1 2 Rr Rr(1-s)/s Vr_dq Vr_dq(1-s)/s r T o r q u e (p.u.) ( Vdq _ r = 0+ j0) -1-2 Generating -3 Slip

17 DFIG Torque Characteristics under d-q d q Control r ( Vdq _ r = Vrd + jvrq ) 20 Vd=-0.08p.u. 10 Vd=0 p.u Vq=0p.u. Torque (p.u.) Vd=0.28p.u. T o rq u e (p.u.) Vq=-0.08p.u. -20 Vq=0.28p.u Slip Slip V rd =-0.08 to 0.28 p.u., ΔV rd =0.04 p.u., V rq =0 V rq =-0.08 to 0.28 p.u., ΔV rq =0.04 p.u., V rd =0 (V rd d-axis component of rotor voltage; V rq - q-axis component of rotor voltage)

18 DFIG Stator Real Power Characteristics Stator Real Power (p.u.) Vd=-0.1 p.u Vd=0.1 p.u Slip Vd=0 p.u. Stator P o w e r (p. u. ) 20 Vq=0p.u Vq=-0.08p.u. -20 Vq=0.28p.u. -30 Slip V rd =-0.1 p.u. to 0.1 p.u., ΔV rd =0.01 p.u., V rq =0 V rq =-0.08 to 0.28 p.u., ΔV rq =0.04 p.u., V rd =0 (V rd d-axis component of rotor voltage; V rq - q-axis component of rotor voltage)

19 DFIG Stator Reactive Power Characteristics R e a c tiv e P o w e r (p.u.) 30 Vd=-0.08p.u Vd=0p.u Slip R eactive Power (p.u.) Vq=0.28p.u. 40 Vq=0 p.u Vd=0.28p.u. Vq=-0.08p.u. -20 Slip V rd =-0.08 to 0.28 p.u., ΔV rd =0.04 p.u., V rq =0 V rq =-0.08 to 0.28 p.u., ΔV rq =0.04 p.u., V rd =0 (V rd d-axis of the rotor voltage; V rq - q-axis component of the rotor voltage)

20 General Properties of DFIG Wind Turbine Torque characteristics: generating mode: from over-synchronous to sub-synchronous speed region pushover torque increases; improve DFIG stability. Stator real power characteristics: similar to the torque characteristics. d-axis voltage is more stable for torque and real power control; Reactive power: d or q control alone result in excessive reactive power, requiring q or d control to compensate the reactive power. q-axis voltage is more stable for reactive power control. Control coordination between d and q is important: keep the pushover torque smaller than the generator driving torque maintain stator and rotor power within the rated power limitations.

21 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

22 Wind farm Model with Multiple Wind Turbines (uncompensated) R L Vdq_g 1 2 Zs + Vdq_f PCC + Is_dq Vs_dq Rs Lls 1 2 Lm 1 Ir_dq + Ems_dq Llr 1 2 Rr Rr(1-s)/s Vr_dq Vr_dq(1-s)/s Voltage balance equation: r r r One turbine only: Vdq _ f = Vdq _ g Idq1 Zs r r r r = ( + L+ ) r r r r = V ni Z = V I n Z n turbines: Vdq _ f Vdq _ g Idq 1 Idqn Zs ( ) dq _ g dq1 s dq _ g dq1 s

23 Wind Farm using Fixed-Speed IGs Voltage (p.u.) 1turbine 10turbines 50turbines 100turbines 150turbines Torque (p.u.) 1 turbine 10 turbines 50 turbines 100 turbines 150 turbines slip slip -2.5

24 Properties of Fixed-Speed IG Wind Farm (as number of turbines added to the wind farm increases) Generator terminal voltage drops. Torque characteristics of a wind turbine shrink (also true for output power-speed characteristics). Both terminal voltage drop and equivalent line impedance changes cause the torque characteristics to shrink. Stability of a fixed-speed wind turbine is reduced.

25 Wind Farm using variable-speed DFIGs Torque (p.u.) turbine 10 turbines 50 turbines 100 turbines 150 turbines Torq ue (p.u.) turbine 10 turbines 50 turbines 100 turbines 150 turbines -100 slip -3 slip (V rd =0.2 p.u., V rq =0 p.u.)

26 Properties of Variable-Speed DFIG Wind Farm (as number of turbines added to the wind farm increases) Around the synchronous slip: more reactive power generation higher generator terminal voltage pushover torque increases rather than decreases (also true for stator real power characteristics) DFIG becomes more stable. Away from the synchronous speed: voltage boost effect drops quickly. the effectiveness of the speed control is reduced. a larger voltage control signal is needed for the same speed control effect the rotor-side converter is more fragile to get into the converter nonlinear modulation mode.

27 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

28 Wind farm Model with Multiple Wind Turbines (parallel compensated) R Vdq_g Zs L Vdq_f PCC Cp Is_dq Rs + Vs_dq Lls 1 2 Lm 1 Ir_dq + Ems_dq Llr 1 2 Rr Rr(1-s)/s Vr_dq Vr_dq(1-s)/s Voltage balance equation: One turbine only: r r r r r r V = V I + I Z ; I = jx V ( ) dq _ f dq _ g dq1 dq _ cp1 s dq _ cp1 cp dq _ f n turbines: r r r r r r V = V I + I nz ; I = jx V ( ) ( ) dq _ f dq _ g dq1 dq _ cp1 s dq _ cp1 cp dq _ f

29 Wind Farm using Fixed-Speed IGs Voltage (p.u.) 1 turbine 10turbines 50turbines 100turbines 150turbines slip Torque (p.u.) 1turbine 10turbines 50turbines 100turbines 150turbines slip

30 Properties of Parallel Compensated Fixed-Speed IG Wind Farm (as number of turbines added to the wind farm increases) A properly selected parallel capacitor: generator terminal voltage is boosted pushover torque is improved at the price of a high over-voltage To avoid a high over-voltage: Either a thyristor controlled parallel compensation or a smaller parallel capacitor A smaller parallel capacitor torque characteristics of a fixed-speed IG still shrink considerably

31 Wind Farm using variable-speed DFIGs Torque (p.u.) turbine 10 turbines 50 turbines 100 turbines 150 turbines Torq ue (p.u.) turbine 10 turbines 50 turbines 100 turbines 150 turbines -250 slip -3 slip (V rd =0.2 p.u., V rq =0 p.u.)

32 Properties of Parallel Compensated Variable-Speed DFIG Wind Farm (as number of turbines added to the wind farm increases) Around the synchronous slip: more reactive power generation higher generator terminal voltage pushover torque increases rather than decreases (also true for stator real power characteristics) DFIG becomes more stable. Away from the synchronous speed: voltage boost effect drops quickly. the effectiveness of the speed control is reduced. a larger voltage control signal is needed for the same speed control effect the rotor-side converter is more fragile to get into the converter nonlinear modulation mode.

33 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

34 Wind farm Model with Multiple Wind Turbines (series compensated) R L Vdq_g Zs 1 2 Cs + Vdq_f PCC + Is_dq Vs_dq Rs Lls 1 2 Lm 1 Ir_dq + Ems_dq Llr 1 2 Rr Rr(1-s)/s Vr_dq Vr_dq(1-s)/s Voltage balance equation: One turbine only: r r r V = V I Z X ( ) dq _ f dq _ g dq1 s Cs n turbines: r r r V = V I n Z X ( ) dq _ f dq _ g dq1 s Cs

35 Wind Farm using Fixed-Speed IGs T o r q u e ( p. u. ) 1 turbine 10 turbines 50 turbines 100 turbines 150 turbines T o r q u e ( p. u. ) 1 turbine 10 turbines 50 turbines 100 turbines 150 turbines slip -3 slip -8

36 Properties of Series Compensated Fixed-Speed IG Wind Farm (as number of turbines added to the wind farm increases) A properly selected series capacitor: voltage regulation is greatly reduced generator torque characteristics and stability are improved usually requires a large capacitor Over compensation: A low series capacitance a high generator terminal voltage significant drop of generator torque characteristics affect proper and/or stable operation of fixed-speed wind turbines.

37 Wind Farm using variable-speed DFIGs T o r q u e (p.u.) 1 turbine 10 turbines 50 turbines 100 turbines 150 turbines T o r q u e (p.u.) 1 turbine 10 turbines 50 turbines 100 turbines 150 turbines slip -150 slip (V rd =0.2 p.u., V rq =0 p.u.)

38 Properties of Series Compensated Variable-Speed DFIG Wind Farm (as number of turbines added to the wind farm increases) A properly selected series capacitor: Equivalent line impendence is much smaller. Total reactive power generation increases at low speed. Torque characteristics expand Voltage control signal is smaller than that without a series compensation for the same speed control effect Converter has larger margin toward its nonlinear modulation mode. Over compensation: high generator terminal voltage considerable distortion of DFIG characteristics affect operation, efficiency and effective control of DFIG wind turbines on the wind farm.

39 Contents 1. Steady-state model in d-q frame 2. Characteristics of a single wind turbine 3. WECS characteristics as multiple turbines are connected online 4. WECS characteristics under parallel compensation 5. WECS characteristics under series compensation 6. Integrated steady-state and transient studies 7. Conclusions

40 Integrated Simulation Environment d-q control of the rotor-side controller affect machine operating data simultaneously: Torque & speed Stator real and reactive power Rotor real and reactive power Stator/rotor d and q currents. Integrative study: examine input/output power, torque, and other parametric data concurrently evaluate various practical constraints rated power of the stator and rotor windings acceptable slip converter linear modulation requirement.

41 Integrated Steady-State State Study Using MathCAD Z m Z s Z m n := 1 Z s := Z s0 + Z st + nz t Z th := V Z m + Z th_dq := V g_dq s Z s + Z m Injected rotor v oltage V rd := 3 99V V rq := V V r_dq := V rd + jv rq Find operating slip and rotor speed V r_dq V Given th_dq s 1 Re 1 s 1 Z th + Z r + R r s 1 ( ) I r_dq := V r_dq V s th_dq slip Z rt 1 s slip V r_dq E ms := I r_dq Z r + R r + P air := Re ( E ms I r_dq ) P air = kW s slip s slip Generator terminal voltage E ms I ms_dq := Z m I s_dq := I ms_dq I r_dq V s_dq := E ms + I s_dq Z s0 V s_dq = V Stator real and reactiv e power ( ) ( ) P stator := Re V s_dq I s_dq P stator = kW Q stator := Im V s_dq I s_dq Q stator = kW Rotor real and reactiv e power ( ) ( ) P rotor := Re V r_dq I r_dq P rotor = kW Q rotor := Im V r_dq I r_dq Q rotor = kW Efficiency ( ) ( ) 1 s 1 R r s 1 s slip := Find( s 1 ) s slip V r_dq ( 1 s 1 ) s 1 V r_dq V th_dq s 1 P ( 1 s 1 ) drive + P rot Z th + Z r + R r s 1 ( ) = ω m := ω syn 1 s slip ω m = Hz P drive Input driv e torque τ in := τ in = Nm ω m Conv ertered power P conv := P rot + P drive P conv = 595kW Air gap power ( ) 1 s slip Z rt := Z th + Z r + R r s slip η( P r ) := P stator P in P r if P r 0 P stator P r P in if P r < 0 η( P rotor ) = %

42 Integrative power generation and control study (Turbine drive power: 600kW; Turbine rotational speed: 120rad/s) No. of wind turbines Uncompensated Parallel Series Stator line voltage (V) Stator real power (kw) Resultant reactive power (kvar) Rotor real power (kw) Rotor reactive power (kvar) V rd control (V) V rq control (V) Generator Efficiency (%)

43 Integrated Transient Study Using SimPowerSystems

44 DFIG transient simulation under constant turbine driving torque a) Rotor speed (rad/s) t (s ) b ) Stator power (kw) t (s ) R e a l p o w e r R e a c t i v e p o w e r c) Rotor Power (kw) R e a l p o w e r r e a c t iv e p o w e r t (s ) When stable, transient results match steady-state results perfectly.

45 Conclusions As the number of turbines online increases Uncompensated wind park: Fixed-speed WECS: torque characteristics shrinks obviously. Variable-speed DFIG WECS: DFIG stability increases as more turbines are connected online A higher voltage control signal may be needed to get the same speed control effect Parallel compensated wind park: Fixed-speed WECS: Enhances the generator torque characteristics Over-voltage may become a critical problem. Variable-speed DFIG WECS: DFIG stability is reinforced A higher voltage control signal may still be needed to achieve the same speed control effect. Series compensated wind park: Properly designed series compensation improves the generator profiles for both fixed and variable speed induction generators. A high overcompensation may derogate fixed-speed wind turbine characteristics and distort the DFIG characteristics significantly.

46

University of Jordan Faculty of Engineering & Technology Electric Power Engineering Department

University of Jordan Faculty of Engineering & Technology Electric Power Engineering Department University of Jordan Faculty of Engineering & Technology Electric Power Engineering Department EE471: Electrical Machines-II Tutorial # 2: 3-ph Induction Motor/Generator Question #1 A 100 hp, 60-Hz, three-phase

More information

Direct Quadrate (D-Q) Modeling of 3-Phase Induction Motor Using MatLab / Simulink

Direct Quadrate (D-Q) Modeling of 3-Phase Induction Motor Using MatLab / Simulink Direct Quadrate (D-Q) Modeling of 3-Phase Induction Motor Using MatLab / Simulink Sifat Shah, A. Rashid, MKL Bhatti COMSATS Institute of Information and Technology, Abbottabad, Pakistan Abstract This paper

More information

Comparative Analysis of an integration of a Wind Energy Conversion System of PMSG and DFIG Models Connected to Power Grid

Comparative Analysis of an integration of a Wind Energy Conversion System of PMSG and DFIG Models Connected to Power Grid International Journal of Electrical Engineering. ISSN 0974-2158 Volume 6, Number 3 (2013), pp. 231-248 International Research Publication House http://www.irphouse.com Comparative Analysis of an integration

More information

Equivalent Circuits with Multiple Damper Windings (e.g. Round rotor Machines)

Equivalent Circuits with Multiple Damper Windings (e.g. Round rotor Machines) Equivalent Circuits with Multiple Damper Windings (e.g. Round rotor Machines) d axis: L fd L F - M R fd F L 1d L D - M R 1d D R fd R F e fd e F R 1d R D Subscript Notations: ( ) fd ~ field winding quantities

More information

Control of Wind Turbine Generators. James Cale Guest Lecturer EE 566, Fall Semester 2014 Colorado State University

Control of Wind Turbine Generators. James Cale Guest Lecturer EE 566, Fall Semester 2014 Colorado State University Control of Wind Turbine Generators James Cale Guest Lecturer EE 566, Fall Semester 2014 Colorado State University Review from Day 1 Review Last time, we started with basic concepts from physics such as

More information

REAL TIME CONTROL OF DOUBLY FED INDUCTION GENERATOR. Benmeziane Meriem, Zebirate Soraya, Chaker Abelkader Laboratory SCAMRE, ENPO, Oran, Algeria

REAL TIME CONTROL OF DOUBLY FED INDUCTION GENERATOR. Benmeziane Meriem, Zebirate Soraya, Chaker Abelkader Laboratory SCAMRE, ENPO, Oran, Algeria REAL TIME CONTROL OF DOUBLY FED INDUCTION GENERATOR Benmeziane Meriem, Zebirate Soraya, Chaker Abelkader Laboratory SCAMRE, ENPO, Oran, Algeria This paper presents a real time simulation method of wind

More information

Modeling Free Acceleration of a Salient Synchronous Machine Using Two-Axis Theory

Modeling Free Acceleration of a Salient Synchronous Machine Using Two-Axis Theory 1 Modeling ree Acceleration of a Salient Synchronous Machine Using Two-Axis Theory Abdullah H. Akca and Lingling an, Senior Member, IEEE Abstract This paper investigates a nonlinear simulation model of

More information

Mathematical Modelling of an 3 Phase Induction Motor Using MATLAB/Simulink

Mathematical Modelling of an 3 Phase Induction Motor Using MATLAB/Simulink 2016 IJSRSET Volume 2 Issue 3 Print ISSN : 2395-1990 Online ISSN : 2394-4099 Themed Section: Engineering and Technology Mathematical Modelling of an 3 Phase Induction Motor Using MATLAB/Simulink ABSTRACT

More information

MATLAB SIMULINK Based DQ Modeling and Dynamic Characteristics of Three Phase Self Excited Induction Generator

MATLAB SIMULINK Based DQ Modeling and Dynamic Characteristics of Three Phase Self Excited Induction Generator 628 Progress In Electromagnetics Research Symposium 2006, Cambridge, USA, March 26-29 MATLAB SIMULINK Based DQ Modeling and Dynamic Characteristics of Three Phase Self Excited Induction Generator A. Kishore,

More information

Analysis and Calculation of Rotor Currents for Doubly Fed Induction Generator at An Early Stage of Terminal Voltage Dip

Analysis and Calculation of Rotor Currents for Doubly Fed Induction Generator at An Early Stage of Terminal Voltage Dip International Conference on Information Sciences, achinery, aterials and Energy (ICISE 15) Analysis and Calculation of Rotor Currents for Doubly Fed Induction Generator at An Early Stage of Terminal Voltage

More information

Introduction to Synchronous. Machines. Kevin Gaughan

Introduction to Synchronous. Machines. Kevin Gaughan Introduction to Synchronous Machines Kevin Gaughan The Synchronous Machine An AC machine (generator or motor) with a stator winding (usually 3 phase) generating a rotating magnetic field and a rotor carrying

More information

INDUCTION MOTOR MODEL AND PARAMETERS

INDUCTION MOTOR MODEL AND PARAMETERS APPENDIX C INDUCTION MOTOR MODEL AND PARAMETERS C.1 Dynamic Model of the Induction Motor in Stationary Reference Frame A three phase induction machine can be represented by an equivalent two phase machine

More information

CHAPTER 3 ANALYSIS OF THREE PHASE AND SINGLE PHASE SELF-EXCITED INDUCTION GENERATORS

CHAPTER 3 ANALYSIS OF THREE PHASE AND SINGLE PHASE SELF-EXCITED INDUCTION GENERATORS 26 CHAPTER 3 ANALYSIS OF THREE PHASE AND SINGLE PHASE SELF-EXCITED INDUCTION GENERATORS 3.1. INTRODUCTION Recently increase in energy demand and limited energy sources in the world caused the researchers

More information

Wind Turbines under Power-Grid Partial Islanding

Wind Turbines under Power-Grid Partial Islanding European Association for the Development of Renewable Energies, Environment and Power Quality (EAEPQ) International Conference on Renewable Energies and Power Quality (ICREPQ 1) Santiago de Compostela

More information

Synchronous Machines

Synchronous Machines Synchronous Machines Synchronous generators or alternators are used to convert mechanical power derived from steam, gas, or hydraulic-turbine to ac electric power Synchronous generators are the primary

More information

Chapter 6. Induction Motors. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Chapter 6. Induction Motors. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 6 Induction Motors 1 The Development of Induced Torque in an Induction Motor Figure 6-6 The development of induced torque in an induction motor. (a) The rotating stator field B S induces a voltage

More information

ECEN 667 Power System Stability Lecture 18: Voltage Stability, Load Models

ECEN 667 Power System Stability Lecture 18: Voltage Stability, Load Models ECEN 667 Power System Stability Lecture 18: Voltage Stability, Load Models Prof. Tom Overbye Dept. of Electrical and Computer Engineering Texas A&M University, overbye@tamu.edu 1 Announcements Read Chapter

More information

Lecture 9: Space-Vector Models

Lecture 9: Space-Vector Models 1 / 30 Lecture 9: Space-Vector Models ELEC-E8405 Electric Drives (5 ECTS) Marko Hinkkanen Autumn 2017 2 / 30 Learning Outcomes After this lecture and exercises you will be able to: Include the number of

More information

Chapter 4. Synchronous Generators. Basic Topology

Chapter 4. Synchronous Generators. Basic Topology Basic Topology Chapter 4 ynchronous Generators In stator, a three-phase winding similar to the one described in chapter 4. ince the main voltage is induced in this winding, it is also called armature winding.

More information

CHAPTER 6 STEADY-STATE ANALYSIS OF SINGLE-PHASE SELF-EXCITED INDUCTION GENERATORS

CHAPTER 6 STEADY-STATE ANALYSIS OF SINGLE-PHASE SELF-EXCITED INDUCTION GENERATORS 79 CHAPTER 6 STEADY-STATE ANALYSIS OF SINGLE-PHASE SELF-EXCITED INDUCTION GENERATORS 6.. INTRODUCTION The steady-state analysis of six-phase and three-phase self-excited induction generators has been presented

More information

From now, we ignore the superbar - with variables in per unit. ψ ψ. l ad ad ad ψ. ψ ψ ψ

From now, we ignore the superbar - with variables in per unit. ψ ψ. l ad ad ad ψ. ψ ψ ψ From now, we ignore the superbar - with variables in per unit. ψ 0 L0 i0 ψ L + L L L i d l ad ad ad d ψ F Lad LF MR if = ψ D Lad MR LD id ψ q Ll + Laq L aq i q ψ Q Laq LQ iq 41 Equivalent Circuits for

More information

A simple model based control of self excited induction generators over a wide speed range

A simple model based control of self excited induction generators over a wide speed range ISSN 1 746-7233, England, UK World Journal of Modelling and Simulation Vol. 10 (2014) No. 3, pp. 206-213 A simple model based control of self excited induction generators over a wide speed range Krishna

More information

3 d Calculate the product of the motor constant and the pole flux KΦ in this operating point. 2 e Calculate the torque.

3 d Calculate the product of the motor constant and the pole flux KΦ in this operating point. 2 e Calculate the torque. Exam Electrical Machines and Drives (ET4117) 11 November 011 from 14.00 to 17.00. This exam consists of 5 problems on 4 pages. Page 5 can be used to answer problem 4 question b. The number before a question

More information

Generators for wind power conversion

Generators for wind power conversion Generators for wind power conversion B. G. Fernandes Department of Electrical Engineering Indian Institute of Technology, Bombay Email : bgf@ee.iitb.ac.in Outline of The Talk Introduction Constant speed

More information

Dynamic Analysis of Grid Connected Wind Farms Using ATP

Dynamic Analysis of Grid Connected Wind Farms Using ATP Dynamic Analysis of Grid Connected Wind Farms Using ATP A. Samuel Neto, F. A. S. Neves Universidade Federal de Pernambuco Department of Electrical Engineering and Power Systems 50740-50 Recife, PE - BRASIL

More information

2016 Kappa Electronics Motor Control Training Series Kappa Electronics LLC. -V th. Dave Wilson Co-Owner Kappa Electronics.

2016 Kappa Electronics Motor Control Training Series Kappa Electronics LLC. -V th. Dave Wilson Co-Owner Kappa Electronics. 2016 Kappa Electronics Motor Control Training Series 2016 Kappa Electronics C V th CoOwner Kappa Electronics www.kappaiq.com Benefits of Field Oriented Control NewtonMeters Maximum Torque Per Amp (MTPA)

More information

TRANSIENT ANALYSIS OF SELF-EXCITED INDUCTION GENERATOR UNDER BALANCED AND UNBALANCED OPERATING CONDITIONS

TRANSIENT ANALYSIS OF SELF-EXCITED INDUCTION GENERATOR UNDER BALANCED AND UNBALANCED OPERATING CONDITIONS TRANSIENT ANALYSIS OF SELF-EXCITED INDUCTION GENERATOR UNDER BALANCED AND UNBALANCED OPERATING CONDITIONS G. HARI BABU Assistant Professor Department of EEE Gitam(Deemed to be University), Visakhapatnam

More information

CONTROL ASPECTS OF WIND TURBINES. Faizal Hafiz, Wind Energy Research Group, SET Center

CONTROL ASPECTS OF WIND TURBINES. Faizal Hafiz, Wind Energy Research Group, SET Center CONTROL ASPECTS OF WIND TURBINES Faizal Hafiz, Wind Energy Research Group, SET Center Presentation Outline 2 Power in Wind Maximum Power Point Tracking Connection Topologies Active Power Control How? Grid

More information

ECE 422/522 Power System Operations & Planning/ Power Systems Analysis II 2 Synchronous Machine Modeling

ECE 422/522 Power System Operations & Planning/ Power Systems Analysis II 2 Synchronous Machine Modeling ECE 422/522 Power System Operations & Planning/ Power Systems Analysis II 2 Synchronous achine odeling Spring 214 Instructor: Kai Sun 1 Outline Synchronous achine odeling Per Unit Representation Simplified

More information

Doubly-Fed Induction Generator Wind Turbine Model for Fault Ride-Through Investigation

Doubly-Fed Induction Generator Wind Turbine Model for Fault Ride-Through Investigation 32 ECTI TRANSACTIONS ON ELECTRICAL ENG., ELECTRONICS, AND COMMUNICATIONS VOL.11, NO.1 February 2013 Doubly-Fed Induction Generator Wind Turbine Model for Fault Ride-Through Investigation Yutana Chongjarearn

More information

Simulations and Control of Direct Driven Permanent Magnet Synchronous Generator

Simulations and Control of Direct Driven Permanent Magnet Synchronous Generator Simulations and Control of Direct Driven Permanent Magnet Synchronous Generator Project Work Dmitry Svechkarenko Royal Institute of Technology Department of Electrical Engineering Electrical Machines and

More information

A Power System Dynamic Simulation Program Using MATLAB/ Simulink

A Power System Dynamic Simulation Program Using MATLAB/ Simulink A Power System Dynamic Simulation Program Using MATLAB/ Simulink Linash P. Kunjumuhammed Post doctoral fellow, Department of Electrical and Electronic Engineering, Imperial College London, United Kingdom

More information

International Journal of Advance Engineering and Research Development

International Journal of Advance Engineering and Research Development Scientific Journal of Impact Factor (SJIF): 4.7 International Journal of Advance Engineering and Research Development Volume 4, Issue 5, May-07 e-issn (O): 348-4470 p-issn (P): 348-6406 Mathematical modeling

More information

Step Motor Modeling. Step Motor Modeling K. Craig 1

Step Motor Modeling. Step Motor Modeling K. Craig 1 Step Motor Modeling Step Motor Modeling K. Craig 1 Stepper Motor Models Under steady operation at low speeds, we usually do not need to differentiate between VR motors and PM motors (a hybrid motor is

More information

SUbsynchronous resonance (SSR) oscillations were observed

SUbsynchronous resonance (SSR) oscillations were observed Impedance Model Based SSR Analysis for Type 3 Wind Generator and Series Compensated Network Zhixin Miao, Senior Member, IEEE Abstract Interaction between doubly-fed induction generator (DFIG) Type 3 wind

More information

ECE 325 Electric Energy System Components 7- Synchronous Machines. Instructor: Kai Sun Fall 2015

ECE 325 Electric Energy System Components 7- Synchronous Machines. Instructor: Kai Sun Fall 2015 ECE 325 Electric Energy System Components 7- Synchronous Machines Instructor: Kai Sun Fall 2015 1 Content (Materials are from Chapters 16-17) Synchronous Generators Synchronous Motors 2 Synchronous Generators

More information

Steady State Modeling of Doubly Fed Induction Generator

Steady State Modeling of Doubly Fed Induction Generator Steady State Modeling of Douly Fed Induction Generator Bhola Jha 1, Dr. K. R. M Rao 2 1 Dept. of Electrical Engg., G. B. Pant Engg. College, Pauri-Garhwal, India 2 Dept. of Electrical Engg., M. J. College

More information

Vector Controlled Power Generation in a Point Absorber Based Wave Energy Conversion System

Vector Controlled Power Generation in a Point Absorber Based Wave Energy Conversion System Vector Controlled Power Generation in a Point Absorber Based Wave Energy Conversion System Jisha Thomas Chandy 1 and Mr. Vishnu J 2 1,2 Electrical & Electronics Dept of Engineering, Sree Buddha College

More information

SCHOOL OF ELECTRICAL, MECHANICAL AND MECHATRONIC SYSTEMS. Transient Stability LECTURE NOTES SPRING SEMESTER, 2008

SCHOOL OF ELECTRICAL, MECHANICAL AND MECHATRONIC SYSTEMS. Transient Stability LECTURE NOTES SPRING SEMESTER, 2008 SCHOOL OF ELECTRICAL, MECHANICAL AND MECHATRONIC SYSTEMS LECTURE NOTES Transient Stability SPRING SEMESTER, 008 October 7, 008 Transient Stability Transient stability refers to the ability of a synchronous

More information

Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science Electric Machines

Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science Electric Machines Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.685 Electric Machines Problem Set 10 Issued November 11, 2013 Due November 20, 2013 Problem 1: Permanent

More information

Synchronous Machines

Synchronous Machines Synchronous machine 1. Construction Generator Exciter View of a twopole round rotor generator and exciter. A Stator with laminated iron core C Slots with phase winding B A B Rotor with dc winding B N S

More information

Dynamic Modeling Of A Dual Winding Induction Motor Using Rotor Reference Frame

Dynamic Modeling Of A Dual Winding Induction Motor Using Rotor Reference Frame American Journal of Engineering Research (AJER) e-issn: 2320-0847 p-issn : 2320-0936 Volume-7, Issue-11, pp-323-329 www.ajer.org Research Paper Open Access Dynamic Modeling Of A Dual Winding Induction

More information

Generation, transmission and distribution, as well as power supplied to industrial and commercial customers uses a 3 phase system.

Generation, transmission and distribution, as well as power supplied to industrial and commercial customers uses a 3 phase system. Three-phase Circuits Generation, transmission and distribution, as well as power supplied to industrial and commercial customers uses a 3 phase system. Where 3 voltages are supplied of equal magnitude,

More information

Lecture Set 8 Induction Machines

Lecture Set 8 Induction Machines Lecture Set 8 Induction Machine S.D. Sudhoff Spring 2018 Reading Chapter 6, Electromechanical Motion Device, Section 6.1-6.9, 6.12 2 Sample Application Low Power: Shaded pole machine (mall fan) Permanent

More information

SIMULATION OF STEADY-STATE PERFORMANCE OF THREE PHASE INDUCTION MOTOR BY MATLAB

SIMULATION OF STEADY-STATE PERFORMANCE OF THREE PHASE INDUCTION MOTOR BY MATLAB olume No.0, Issue No. 08, August 014 ISSN (online): 48 7550 SIMULATION OF STEADY-STATE PERFORMANCE OF THREE PHASE INDUCTION MOTOR BY MATLAB Harish Kumar Mishra 1, Dr.Anurag Tripathi 1 Research Scholar,

More information

Chapter 5 Three phase induction machine (1) Shengnan Li

Chapter 5 Three phase induction machine (1) Shengnan Li Chapter 5 Three phase induction machine (1) Shengnan Li Main content Structure of three phase induction motor Operating principle of three phase induction motor Rotating magnetic field Graphical representation

More information

EE 742 Chapter 3: Power System in the Steady State. Y. Baghzouz

EE 742 Chapter 3: Power System in the Steady State. Y. Baghzouz EE 742 Chapter 3: Power System in the Steady State Y. Baghzouz Transmission Line Model Distributed Parameter Model: Terminal Voltage/Current Relations: Characteristic impedance: Propagation constant: π

More information

SPEED SENSOR-LESS CONTROL OF INDUCTION MACHINE BASED ON CARRIER SIGNAL INJECTION AND SMOOTH-AIR-GAP INDUCTION MACHINE MODEL

SPEED SENSOR-LESS CONTROL OF INDUCTION MACHINE BASED ON CARRIER SIGNAL INJECTION AND SMOOTH-AIR-GAP INDUCTION MACHINE MODEL The Pennsylvania State University The Graduate School Department of Electrical Engineering SPEED SENSOR-LESS CONTROL OF INDUCTION MACHINE BASED ON CARRIER SIGNAL INJECTION AND SMOOTH-AIR-GAP INDUCTION

More information

1 Unified Power Flow Controller (UPFC)

1 Unified Power Flow Controller (UPFC) Power flow control with UPFC Rusejla Sadikovic Internal report 1 Unified Power Flow Controller (UPFC) The UPFC can provide simultaneous control of all basic power system parameters ( transmission voltage,

More information

INVESTIGATION OF A COMPUTER MODEL OF THREE-PHASE MOTOR REGULATED BY FREQUENCY MODE

INVESTIGATION OF A COMPUTER MODEL OF THREE-PHASE MOTOR REGULATED BY FREQUENCY MODE INVESTIGATION OF A COMPUTER MODEL OF THREE-PHASE MOTOR REGULATED BY FREQUENCY MODE Dinko Petkov Gospodinov, Pencho Venkov Georgiev TU-Gabrovo 5300, H.Dimitar str. 4, Department of Electronics, e-mail:

More information

Power system modelling under the phasor approximation

Power system modelling under the phasor approximation ELEC0047 - Power system dynamics, control and stability Thierry Van Cutsem t.vancutsem@ulg.ac.be www.montefiore.ulg.ac.be/~vct October 2018 1 / 16 Electromagnetic transient vs. phasor-mode simulations

More information

The synchronous machine (detailed model)

The synchronous machine (detailed model) ELEC0029 - Electric Power System Analysis The synchronous machine (detailed model) Thierry Van Cutsem t.vancutsem@ulg.ac.be www.montefiore.ulg.ac.be/~vct February 2018 1 / 6 Objectives The synchronous

More information

A Novel Adaptive Estimation of Stator and Rotor Resistance for Induction Motor Drives

A Novel Adaptive Estimation of Stator and Rotor Resistance for Induction Motor Drives A Novel Adaptive Estimation of Stator and Rotor Resistance for Induction Motor Drives Nagaraja Yadav Ponagani Asst.Professsor, Department of Electrical & Electronics Engineering Dhurva Institute of Engineering

More information

EFFECTS OF LOAD AND SPEED VARIATIONS IN A MODIFIED CLOSED LOOP V/F INDUCTION MOTOR DRIVE

EFFECTS OF LOAD AND SPEED VARIATIONS IN A MODIFIED CLOSED LOOP V/F INDUCTION MOTOR DRIVE Nigerian Journal of Technology (NIJOTECH) Vol. 31, No. 3, November, 2012, pp. 365 369. Copyright 2012 Faculty of Engineering, University of Nigeria. ISSN 1115-8443 EFFECTS OF LOAD AND SPEED VARIATIONS

More information

EFFICIENCY OPTIMIZATION OF VECTOR-CONTROLLED INDUCTION MOTOR DRIVE

EFFICIENCY OPTIMIZATION OF VECTOR-CONTROLLED INDUCTION MOTOR DRIVE EFFICIENCY OPTIMIZATION OF VECTOR-CONTROLLED INDUCTION MOTOR DRIVE Hussein Sarhan Department of Mechatronics Engineering, Faculty of Engineering Technology, Amman, Jordan ABSTRACT This paper presents a

More information

International Journal of Advance Engineering and Research Development SIMULATION OF FIELD ORIENTED CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR

International Journal of Advance Engineering and Research Development SIMULATION OF FIELD ORIENTED CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR Scientific Journal of Impact Factor(SJIF): 3.134 e-issn(o): 2348-4470 p-issn(p): 2348-6406 International Journal of Advance Engineering and Research Development Volume 2,Issue 4, April -2015 SIMULATION

More information

CHAPTER 5 STEADY-STATE ANALYSIS OF THREE-PHASE SELF-EXCITED INDUCTION GENERATORS

CHAPTER 5 STEADY-STATE ANALYSIS OF THREE-PHASE SELF-EXCITED INDUCTION GENERATORS 6 CHAPTER 5 STEADY-STATE ANALYSIS OF THREE-PHASE SELF-EXCITED INDUCTION GENERATORS 5.. INTRODUCTION The steady-state analysis of six-phase SEIG has been discussed in the previous chapters. In this chapter,

More information

Dynamic Performance Improvement of an Isolated Wind Turbine Induction Generator

Dynamic Performance Improvement of an Isolated Wind Turbine Induction Generator Dynamic Performance Improvement of an Isolated Wind Turbine Induction Generator A.H.M.A. Rahim, M. Ahsanul Alam and M.F. Kandlawala King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia Abstract

More information

The Modeling and Analysis of Grid Connected DFIG with Low-Voltage Ride- Through Solution Using Series Compensator

The Modeling and Analysis of Grid Connected DFIG with Low-Voltage Ride- Through Solution Using Series Compensator The Modeling and Analysis of Grid Connected DFIG with Low-Voltage Ride- Through Solution Using Series Compensator Khasim Shaik 1, S.Srinu 2, Jan Bhasha Shaik 3 1 Post Graduate Student (M.Tech), Newton

More information

Incorporation of Asynchronous Generators as PQ Model in Load Flow Analysis for Power Systems with Wind Generation

Incorporation of Asynchronous Generators as PQ Model in Load Flow Analysis for Power Systems with Wind Generation Incorporation of Asynchronous Generators as PQ Model in Load Flow Analysis for Power Systems with Wind Generation James Ranjith Kumar. R, Member, IEEE, Amit Jain, Member, IEEE, Power Systems Division,

More information

Vector Controlled Sensorless Estimation and Control of Speed of Induction Motors

Vector Controlled Sensorless Estimation and Control of Speed of Induction Motors Vector Controlled Sensorless Estimation and Control of Speed of Induction Motors Gayatri Gite Electrical Engineering Department SSSIST Sehore Bhopal, India Prabodh Khampariya Electrical Engineering Department

More information

ECE 585 Power System Stability

ECE 585 Power System Stability Homework 1, Due on January 29 ECE 585 Power System Stability Consider the power system below. The network frequency is 60 Hz. At the pre-fault steady state (a) the power generated by the machine is 400

More information

Parameter Estimation of Three Phase Squirrel Cage Induction Motor

Parameter Estimation of Three Phase Squirrel Cage Induction Motor International Conference On Emerging Trends in Mechanical and Electrical Engineering RESEARCH ARTICLE OPEN ACCESS Parameter Estimation of Three Phase Squirrel Cage Induction Motor Sonakshi Gupta Department

More information

A GENERALISED OPERATIONAL EQUIVALENT CIRCUIT OF INDUCTION MACHINES FOR TRANSIENT/DYNAMIC STUDIES UNDER DIFFERENT OPERATING CONDITIONS

A GENERALISED OPERATIONAL EQUIVALENT CIRCUIT OF INDUCTION MACHINES FOR TRANSIENT/DYNAMIC STUDIES UNDER DIFFERENT OPERATING CONDITIONS A GENERALISED OPERATIONAL EQUIVALENT CIRCUIT OF INDUCTION MACHINES FOR TRANSIENT/DYNAMIC STUDIES UNDER DIFFERENT OPERATING CONDITIONS S. S. Murthy Department of Electrical Engineering Indian Institute

More information

Chapter 3 AUTOMATIC VOLTAGE CONTROL

Chapter 3 AUTOMATIC VOLTAGE CONTROL Chapter 3 AUTOMATIC VOLTAGE CONTROL . INTRODUCTION TO EXCITATION SYSTEM The basic function of an excitation system is to provide direct current to the field winding of the synchronous generator. The excitation

More information

Electric Machines I Three Phase Induction Motor. Dr. Firas Obeidat

Electric Machines I Three Phase Induction Motor. Dr. Firas Obeidat Electric Machines I Three Phase Induction Motor Dr. Firas Obeidat 1 Table of contents 1 General Principles 2 Construction 3 Production of Rotating Field 4 Why Does the Rotor Rotate 5 The Slip and Rotor

More information

Analysis and Comparison of High Frequency Resonance in Small and Large Scale DFIG System

Analysis and Comparison of High Frequency Resonance in Small and Large Scale DFIG System Aalborg Universitet Analysis and Comparison of High Frequency Resonance in Small and Large Scale DFIG System Song, Yipeng; Blaabjerg, Frede; Wang, Xiongfei Published in: Proceedings of 8th IEEE Energy

More information

CHAPTER 5 SIMULATION AND TEST SETUP FOR FAULT ANALYSIS

CHAPTER 5 SIMULATION AND TEST SETUP FOR FAULT ANALYSIS 47 CHAPTER 5 SIMULATION AND TEST SETUP FOR FAULT ANALYSIS 5.1 INTRODUCTION This chapter describes the simulation model and experimental set up used for the fault analysis. For the simulation set up, the

More information

Dynamic Modeling of Surface Mounted Permanent Synchronous Motor for Servo motor application

Dynamic Modeling of Surface Mounted Permanent Synchronous Motor for Servo motor application 797 Dynamic Modeling of Surface Mounted Permanent Synchronous Motor for Servo motor application Ritu Tak 1, Sudhir Y Kumar 2, B.S.Rajpurohit 3 1,2 Electrical Engineering, Mody University of Science & Technology,

More information

Generators. What its all about

Generators. What its all about Generators What its all about How do we make a generator? Synchronous Operation Rotor Magnetic Field Stator Magnetic Field Forces and Magnetic Fields Force Between Fields Motoring Generators & motors are

More information

Power System Stability and Control. Dr. B. Kalyan Kumar, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India

Power System Stability and Control. Dr. B. Kalyan Kumar, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India Power System Stability and Control Dr. B. Kalyan Kumar, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, India Contents Chapter 1 Introduction to Power System Stability

More information

Time-Harmonic Modeling of Squirrel-Cage Induction Motors: A Circuit-Field Coupled Approach

Time-Harmonic Modeling of Squirrel-Cage Induction Motors: A Circuit-Field Coupled Approach Time-Harmonic Modeling of Squirrel-Cage Induction Motors: A Circuit-Field Coupled Approach R. Escarela-Perez 1,3 E. Melgoza 2 E. Campero-Littlewood 1 1 División de Ciencias Básicas e Ingeniería, Universidad

More information

REGULAR PAPER. The Improvement Avalability of a Double Star Asynchronous Machine Supplied redondant voltage source inverters

REGULAR PAPER. The Improvement Avalability of a Double Star Asynchronous Machine Supplied redondant voltage source inverters FAOUZI BEN AMMAR SAMI GUIZANI REGULAR PAPER The Improvement Avalability of a Double Star Asynchronous Machine Supplied redondant voltage source inverters This paper proposes the availability analysis of

More information

Lecture 1: Induction Motor

Lecture 1: Induction Motor 1 / 22 Lecture 1: Induction Motor ELEC-E8402 Control of Electric Drives and Power Converters (5 ECTS) Marko Hinkkanen Aalto University School of Electrical Engineering Spring 2016 2 / 22 Learning Outcomes

More information

Nonlinear Control of Variable wind Speed Conversion System Based on a Squirrel Cage Induction Generator (SCIG)

Nonlinear Control of Variable wind Speed Conversion System Based on a Squirrel Cage Induction Generator (SCIG) American Journal of Engineering and Applied Sciences Original Research Paper Nonlinear Control of Variable wind Speed Conversion System Based on a Squirrel Cage Induction Generator (SCIG) Abouobaida Hassan

More information

MODELING AND SIMULATION OF ENGINE DRIVEN INDUCTION GENERATOR USING HUNTING NETWORK METHOD

MODELING AND SIMULATION OF ENGINE DRIVEN INDUCTION GENERATOR USING HUNTING NETWORK METHOD MODELING AND SIMULATION OF ENGINE DRIVEN INDUCTION GENERATOR USING HUNTING NETWORK METHOD K. Ashwini 1, G. N. Sreenivas 1 and T. Giribabu 2 1 Department of Electrical and Electronics Engineering, JNTUH

More information

EEE3405 ELECTRICAL ENGINEERING PRINCIPLES 2 - TEST

EEE3405 ELECTRICAL ENGINEERING PRINCIPLES 2 - TEST ATTEMPT ALL QUESTIONS (EACH QUESTION 20 Marks, FULL MAKS = 60) Given v 1 = 100 sin(100πt+π/6) (i) Find the MS, period and the frequency of v 1 (ii) If v 2 =75sin(100πt-π/10) find V 1, V 2, 2V 1 -V 2 (phasor)

More information

An adaptive sliding mode control scheme for induction motor drives

An adaptive sliding mode control scheme for induction motor drives An adaptive sliding mode control scheme for induction motor drives Oscar Barambones, Patxi Alkorta, Aitor J. Garrido, I. Garrido and F.J. Maseda ABSTRACT An adaptive sliding-mode control system, which

More information

Predictive Control Strategy for DFIG Wind Turbines with Maximum Power Point Tracking Using Multilevel Converters

Predictive Control Strategy for DFIG Wind Turbines with Maximum Power Point Tracking Using Multilevel Converters Predictive Control Strategy for DFIG Wind Turbines with Maximum Power Point Tracking Using Multilevel Converters José Sayritupac 1, Eduardo Albánez 1, Johnny Rengifo 1, José Aller 1,2 and José Restrepo

More information

CHAPTER 2 CAPACITANCE REQUIREMENTS OF SIX-PHASE SELF-EXCITED INDUCTION GENERATORS

CHAPTER 2 CAPACITANCE REQUIREMENTS OF SIX-PHASE SELF-EXCITED INDUCTION GENERATORS 9 CHAPTER 2 CAPACITANCE REQUIREMENTS OF SIX-PHASE SELF-EXCITED INDUCTION GENERATORS 2.. INTRODUCTION Rapidly depleting rate of conventional energy sources, has led the scientists to explore the possibility

More information

Sub-Synchronous Interaction Analysis between DFIG Based Wind Farm and Series Compensated Network

Sub-Synchronous Interaction Analysis between DFIG Based Wind Farm and Series Compensated Network Downloaded from orbit.dtu.dk on: May 01, 2018 Sub-Synchronous Interaction Analysis between DFIG Based Wind Farm and Series Compensated Network Wang, Yun; Wu, Qiuwei; Kang, Shaoli Published in: Proceedings

More information

=, (1) , (2) 1. INTRODUCTION

=, (1) , (2) 1. INTRODUCTION Rev Roum Sci Techn Électrotechn et Énerg Vol 6, 3, pp 63 68, Bucarest, 6 A NOVEL DIRECT POWER CONTROL FOR GRID-CONNECTED DOUBLY FED INDUCTION GENERATOR BASED ON HYBRID ARTIFICIAL INTELLIGENT CONTROL WITH

More information

PARAMETER SENSITIVITY ANALYSIS OF AN INDUCTION MOTOR

PARAMETER SENSITIVITY ANALYSIS OF AN INDUCTION MOTOR HUNGARIAN JOURNAL OF INDUSTRIAL CHEMISTRY VESZPRÉM Vol. 39(1) pp. 157-161 (2011) PARAMETER SENSITIVITY ANALYSIS OF AN INDUCTION MOTOR P. HATOS, A. FODOR, A. MAGYAR University of Pannonia, Department of

More information

Direct Flux Vector Control Of Induction Motor Drives With Maximum Efficiency Per Torque

Direct Flux Vector Control Of Induction Motor Drives With Maximum Efficiency Per Torque Direct Flux Vector Control Of Induction Motor Drives With Maximum Efficiency Per Torque S. Rajesh Babu 1, S. Sridhar 2 1 PG Scholar, Dept. Of Electrical & Electronics Engineering, JNTUACEA, Anantapuramu,

More information

Inertia Identification and Auto-Tuning. of Induction Motor Using MRAS

Inertia Identification and Auto-Tuning. of Induction Motor Using MRAS Inertia Identification and Auto-Tuning of Induction Motor Using MRAS Yujie GUO *, Lipei HUANG *, Yang QIU *, Masaharu MURAMATSU ** * Department of Electrical Engineering, Tsinghua University, Beijing,

More information

Three phase induction motor using direct torque control by Matlab Simulink

Three phase induction motor using direct torque control by Matlab Simulink Three phase induction motor using direct torque control by Matlab Simulink Arun Kumar Yadav 1, Dr. Vinod Kumar Singh 2 1 Reaserch Scholor SVU Gajraula Amroha, U.P. 2 Assistant professor ABSTRACT Induction

More information

Dynamics of the synchronous machine

Dynamics of the synchronous machine ELEC0047 - Power system dynamics, control and stability Dynamics of the synchronous machine Thierry Van Cutsem t.vancutsem@ulg.ac.be www.montefiore.ulg.ac.be/~vct October 2018 1 / 38 Time constants and

More information

A Novel Three-phase Matrix Converter Based Induction Motor Drive Using Power Factor Control

A Novel Three-phase Matrix Converter Based Induction Motor Drive Using Power Factor Control Australian Journal of Basic and Applied Sciences, 8(4) Special 214, Pages: 49-417 AENSI Journals Australian Journal of Basic and Applied Sciences ISSN:1991-8178 Journal home page: www.ajbasweb.com A Novel

More information

Mutual Inductance. The field lines flow from a + charge to a - change

Mutual Inductance. The field lines flow from a + charge to a - change Capacitors Mutual Inductance Since electrical charges do exist, electric field lines have a starting point and an ending point. For example, if you have a + and a - change, the field lines would look something

More information

LESSON 20 ALTERNATOR OPERATION OF SYNCHRONOUS MACHINES

LESSON 20 ALTERNATOR OPERATION OF SYNCHRONOUS MACHINES ET 332b Ac Motors, Generators and Power Systems LESSON 20 ALTERNATOR OPERATION OF SYNCHRONOUS MACHINES 1 LEARNING OBJECTIVES After this presentation you will be able to: Interpret alternator phasor diagrams

More information

Aspects on Wind Turbine Protections and Induction Machine Fault Current Prediction

Aspects on Wind Turbine Protections and Induction Machine Fault Current Prediction Aspects on Wind Turbine Protections and Induction Machine Fault Current Prediction Marcus Helmer Department of Electric Power Engineering CHALMERS UNIVERSITY OF TECHNOLOGY Göteborg, Sweden 2004 THESIS

More information

EE595S : Class Lecture Notes Parameter Identification and Maximum Torque Per Amp Control Algorithm

EE595S : Class Lecture Notes Parameter Identification and Maximum Torque Per Amp Control Algorithm EE595S : Class Lecture Notes Parameter Identification and Maximum Torque Per Amp Control Algorithm Outline GA based AQDM Characterization Procedure MTPA Control strategy AMTPA Control Strategy 2 Alternate

More information

SSC-JE EE POWER SYSTEMS: GENERATION, TRANSMISSION & DISTRIBUTION SSC-JE STAFF SELECTION COMMISSION ELECTRICAL ENGINEERING STUDY MATERIAL

SSC-JE EE POWER SYSTEMS: GENERATION, TRANSMISSION & DISTRIBUTION SSC-JE STAFF SELECTION COMMISSION ELECTRICAL ENGINEERING STUDY MATERIAL 1 SSC-JE STAFF SELECTION COMMISSION ELECTRICAL ENGINEERING STUDY MATERIAL Power Systems: Generation, Transmission and Distribution Power Systems: Generation, Transmission and Distribution Power Systems:

More information

Modelling of Closed Loop Speed Control for Pmsm Drive

Modelling of Closed Loop Speed Control for Pmsm Drive Modelling of Closed Loop Speed Control for Pmsm Drive Vikram S. Sathe, Shankar S. Vanamane M. Tech Student, Department of Electrical Engg, Walchand College of Engineering, Sangli. Associate Prof, Department

More information

ECEN 460 Exam 1 Fall 2018

ECEN 460 Exam 1 Fall 2018 ECEN 460 Exam 1 Fall 2018 Name: KEY UIN: Section: Score: Part 1 / 40 Part 2 / 0 Part / 0 Total / 100 This exam is 75 minutes, closed-book, closed-notes. A standard calculator and one 8.5 x11 note sheet

More information

Sensorless Sliding Mode Control of Induction Motor Drives

Sensorless Sliding Mode Control of Induction Motor Drives Sensorless Sliding Mode Control of Induction Motor Drives Kanungo Barada Mohanty Electrical Engineering Department, National Institute of Technology, Rourkela-7698, India E-mail: kbmohanty@nitrkl.ac.in

More information

EE 451 Power System Stability

EE 451 Power System Stability EE 451 Power System Stability Power system operates in synchronous mode Power system is subjected to a wide range of disturbances (small and large) - Loads and generation changes - Network changes - Faults

More information

Available online at ScienceDirect. Procedia Technology 25 (2016 )

Available online at   ScienceDirect. Procedia Technology 25 (2016 ) Available online at www.sciencedirect.com ScienceDirect Procedia Technology 25 (2016 ) 801 807 Global Colloquium in Recent Advancement and Effectual Researches in Engineering, Science and Technology (RAEREST

More information

Control of an Induction Motor Drive

Control of an Induction Motor Drive Control of an Induction Motor Drive 1 Introduction This assignment deals with control of an induction motor drive. First, scalar control (or Volts-per-Hertz control) is studied in Section 2, where also

More information

Eigenvalue Analysis of Subsynchronous Resonance Study in Series Compensated Wind Farm

Eigenvalue Analysis of Subsynchronous Resonance Study in Series Compensated Wind Farm e-issn: 2349-9745 p-issn: 2393-8161 Scientific Journal Impact Factor (SJIF): 1.711 International Journal of Modern Trends in Engineering and Research www.ijmter.com Eigenvalue Analysis of Subsynchronous

More information