CENTRAL TERMOELÉCTRICA ANDINA UNIDAD Nº 1

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1 PROYECTO PROJECT CENTRAL TERMOELÉCTRICA ANDINA UNIDAD Nº 1 TÍTULO TITLE Technical Data and curves of the Generator Nº DE DOCUMENTO PROYECTO PROJECT DOCUMENT Nº CTA-12-MA EHP-SK-0086_Rev00 REV 00 FECHA DATE 01/02/08 EDITADO PARA ISSUED FOR approval 00/4 01/02/2008 Kaluza For approval / customer rev 00 = Siemens rev 4 Kaluza Ebert RE V FECHA DATE PREPARADO PREPARED DESCRIPCIÓN DESCRIPTION REVISADO CHECKED APROBADO APPROVED Nº SUBCONTRATISTA SUBCONTRACTOR Nº SUBCONTRATISTA SUBCONTRACTOR EDITADO ISSUED PARA INFORMACIÓN / FOR INFORMATION... PARA APROBACIÓN / FOR APPROVAL... PARA PETICIÓN OFERTA-COMPRA / FOR ASKING QUOTATION PURCHASING.. PARA CONSTRUCCIÓN / FOR CONSTRUCTION... SEGÚN LO CONSTRUIDO / AS- BUILT... OTROS / OTHERS... ESTE DOCUMENTO CONTIENE INFORMACIÓN PROPIETARIA Y NO PUEDE SER DUPLICADO, PROCESADO O CEDIDO A TERCEROS PARA UN USO DISTINTO AL DE ESTE PROYECTO Y EL OBJETO PARA EL QUE HA SIDO PREVISTO SIN LA AUTORIZACIÓN ESCRITA DE COBRA. THIS DOCUMENT CONTAINS PROPIETARY INFORMATION AND CAN NOT BE DUPLICATED, PROCESSED OR DISCLOSED TO THIRD PARTIES FOR ANY USE OTHER THAN THIS PROJECT AND THE PURPOSE FOR WHICH IT IS INTENDED FOR WITHOUT THE WRITTEN CONSENT OF COBRA

2 S for Steam- and Gas-Turbines from Erfurt Plant TECHNICAL DATA FOR GENERATOR OFFER Type: SGen5-100A-2P FOR THE PROJECT S N = 206,30 MVA PF = 0,80 U N = 15,75 kv f N = 50 Hz Design corresponds to: I N = 7,56 ka n N = 3000 rpm IEC 34 CONTENT OF THIS FILE Datasheet: Electrical Data, Losses and Efficiencies 0 Reactive Capability Curve 1 No Load Saturation and Short-Circuit Characteristic 2 V-Curves at Rated Voltage 3 Unbalanced Load-Time-Curve 4 Mechanical Data Sheet 5 Efficiency vs. Power and Power Factor 7 Losses vs. Power and Power Factor 8 Armature Current and Field Voltage vs. Time 10 Limitation of Earth Fault Current vs. Time 11 Short Time Voltage/Frequency Capability 12 Mechanical Air Gap Moment in Case of 2 Poles Short Circuit 13 Short Circuit Currents and Time Constants 14 Short Circuit Decrement Curve - 3 poles Short Circuit 15 Short Circuit Decrement Curve - 2 poles Short Circuit 16 Short Circuit Decrement Curve - 1 pole Short Circuit to Earth 17 Vibration Limits 19 CTA-12-MA-EHP-SK-0086_00 The given data are calculated values (if not indicated differently) Die angegebene Werte sind Rechenwerte (wenn nicht anders bezeichnet) SIEMENS Kaluza Rev. 004 Power Generation (PG) - Erfurt Plant Revision P251 G

3 Electrical Data, Losses and Efficiencies Generator Type: SGen5-100A-2P Load Point N A Standard IEC 34 IEC 34 Thermal Classification: Design / Using F / B F / B Apparent Power MVA 206,3 194,1 Active Power MW 165,0 165,0 Cold Air Temperature C 43,0 43,0 Voltage kv 15,75 15,75 Voltage Deviation + - % 5,0 5,0 5,0 5,0 Armature Current ka 7,562 7,115 Frequency Speed Hz rpm Power Factor - 0,80 0,85 Excitation No load I f0 U f0 A V Requirements 4/4-load I fn U fn A V /4-load I f5/4 U f5/4 A V Cooling Air Losses kw Air flow Temp. rise m 3 /s K 50,0 41,1 50,0 39,0 Sudden-SCC I S : 3-phase (peak) ka at No-Load and I K3 : 3-ph. (sustained at I fn ) ka 10,9 10,1 Nominal Voltage I K2 : 2-ph. (sustained at I fn ) ka 17,5 16,2 Short Circuit Ratio - 0,47 0,50 Reactances x" d unsat. sat. % % 19,1 14,3 17,9 13,5 x' d unsat. sat. % % 25,8 23,2 24,3 21,8 calculated values, x d unsat. sat. % % tolerance +/-15% x'' q unsat. sat. % % 21,0 15,7 19,7 14,8 acc. IEC x' q unsat. sat. % % 50,1 45,3 46,0 41,6 x q unsat. sat. % % x 2 unsat. sat. % % 20,0 15,0 18,8 14,1 x 0 unsat. % 10,1 9,5 x leak unsat. % 14,9 14,0 Time constants T'' d s 0,030 0,030 at 75 C T' d s 1,342 1,342 winding T' d0 s 13,680 13,680 temperature T'' d0 s 0,044 0,044 T a s 0,490 0,490 Resistance Stator winding / phase mω 0,96 0,96 at 20 C Rotor winding mω 195,51 195,51 Voltage PF = rated P.F. % 37,4 35,4 regulation PF = 1,00 % 30,9 29,6 Max. unbalanced Continuous % load Short time i 2 2 * t s Power at Underexcited Mvar 81,6 81,6 PF = 0 Overexcited Mvar 167,0 150,3 Winding temp. rise Stator (RTD) K C Winding temp. Rotor (average) K C Losses Bearing losses kw Windage losses kw Core losses kw Short circuit losses kw Rotor I 2 R losses kw Total losses kw Efficiencies with tolerance 4/4-load % 98,69 98,76 at static excitation 3/4-load % 98,55 98,60 and rated P.F. 2/4-load % 98,15 98,18 (incl. bearing losses) 1/4-load % 96,74 96,76

4 Reactive Capability Curve Load Point Rated A S N 206,30 MVA 194,10 MVA U N 15,75 kv 15,75 kv I N 7,562 ka 7,115 ka f N 50 Hz 50 Hz PF 0,80 0,85 T Cold 43,0 C 43,0 C Q/S 1,0 N 0,00 0,20 0,40 0,60 0,70 0,9 0,8 0,80 0,7 0,85 0,6 0,5 0,90 0,4 0,95 0,3 Underexcited Overexcited 0,2 0,1 0,0-0,1-0,2-0,3 0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1 0,975 1,00 0,975 0,95-0,4-0,5 0,00 0,20 0,40 0,60 0,70 0,80 0,85 0,90 P/S N

5 No Load Saturation and Short-Circuit Characteristic Generator - Typ: SGen5-100A-2P S N = 206,30 MVA PF = 0,80 S(1,0) = 15,6 % U N = 15,75 kv SCR = 0,47 S(1,2) = 56,7 % I N = 7,562 ka I f0 = 363 A f N = 50 Hz I fn = 1112 A 2 U / U N I / I N 1,4 1,8 1,2 1,6 1,4 1 1,2 0,8 1 0,6 0,8 0,6 0,4 0,4 0,2 0, ,2 0,4 0,6 0,8 1 1,2 air-gap line no load saturation short circuit characteristic I F [ka]

6 V-Curves at Rated Voltage Generator - Typ: SGen5-100A-2P S N = 206,30 MVA PF = 0,80 I f0 = 363 A U N = 15,75 kv f N = 50 Hz I fn = 1112 A I N = 7,562 ka T Cold Air = 43,0 C practical stability limit (rotor angle safety margin at 82 degrees) rated rated ,10 1,00 0,90 0,80 0, ,60 0,50 heating limit of stator and rotor winding 4/4 3/4 2/4 1/4 0,00 0,10 0,20 0,30 0,40 0,50 0,60 0,70 0,80 0,90 1,00 1,10 I F / I FN 0,40 0,30 0,20 0,10 0,00 I / I N V-Curves Refer to Apparent Power

7 Unbalanced Load-Time-Curve Generator - Typ: SGen5-100A-2P U N = 15,75 kv f N = 50 Hz i2² * t = 10 sec. 0,10 * i2 continuous time t [s] negative sequence current i 2 [p.u.]

8 Mechanical Data Sheet U N = 15,75 kv f N = 50 Hz T Warm Air = 84,1 C P V, Cooler = 2148 kw Dimensions [mm]: L1 = 9900 H1 = 1700 Overall weight: kg L2 = 7750 H2 = 3900 Stator weight: kg L3 = 7300 H3 1) = Rotor weight: kg W1 = 4000 W2 = 1600 Rotor moment of inertia: 6900 kgm² L4 = H4 = 8100 Oil flow for both bearings: 280 l/min for rotor withdrawal crane hook height breakaway torque w. jacking oil: 273 Nm Preliminary values. breakaway torque w/o jacking oil: Nm Exact values are part of detail engineering. Thermal time constants [min]: Stator Winding: Rotor Winding: 19,9 min 7,7 min Estimation for required cooling water 2) flow (for TEWAC - cooling): T A(cooling air) - T W(cooling water) Standard water temperature rise Required cooling water flow 15 K 10 K 203 m³/hour 10 K 7 K 264 m³/hour 5 K 3,5 K 528 m³/hour 1) For cooler in top position. 2) Data are generated independent of cooling method; for DAC- or CACA-applications these data are not applicable.

9 Efficiency vs. Apparent Power and Power Factor U N = 15,75 kv f N = 50 Hz Efficiency acc. to: IEC 34 Apparent Power Output MVA 51,6 103,2 154,7 206,3 p.u. 0,25 0,50 0,75 1,00 Efficiency at P.F. = 1,00 % 97,42 98,56 98,89 99,00 Efficiency at nominal P.F. = 0,80 % 96,74 98,15 98,55 98,69 99,5 99,0 Generator Efficiency [%] 98,5 98,0 97,5 97,0 Power Factor = 1,0 Nominal Power Factor 96,5 0,25 0,50 0,75 1,00 Apparent Power Output / Rated Apparent Power Output [p.u.]

10 Total Losses vs. Apparent Power and Power Factor U N = 15,75 kv f N = 50 Hz Apparent Power Output MVA 51,6 103,2 154,7 206,3 p.u. 0,25 0,50 0,75 1,00 Losses at P.F. = 1,00 kw Losses at nominal P.F. = 0,80 kw Generator Losses [kw] Power Factor = 1,0 Nominal Power Factor 0 0,25 0,50 0,75 1,00 Apparent Power Output / Rated Apparent Power Output [p.u.]

11 Stator Current and Field Voltage versus Time U N = 15,75 kv f N = 50 Hz I fn = 1112 A Time [s] Stator Current I/I N [%] Field Voltage U f /U fn [%] Fullfills IEC and ANSI requirements Stator Current Field Voltage Stator Current [%] Field Voltage [%] Time [s] 100 The generator is capable of operating at 130 percent of rated stator current for 1 min. The generator field winding is capable of operating at 125 percent of rated load field voltage for 1 min. Both requirements are fullfilled starting from stabilized temperatures at rated conditions. It is recognized that winding temperatures under these conditiones will exceed rated-load values. Number of such operations should be limited to two times a year (corresponds to ANSI and IEC).

12 Limitation of Earth Fault Current versus Time U N = 15,75 kv f N = 50 Hz A for 30s 10 Time [s] 1 0,1 0, I 0 [A] I 0 [A] Time [s] Ground fault current over neutral point to earth Limitation time for I 0 to prevent damage from stator iron core Diagram basis is I² * t = const.; 10 A for 30 s is Siemens standard for dimensioning earthing. When exceeding limitation curve, stator iron is endangered melting in the fault region. Worst case is earth fault on phase side (opposite to neutral point side) of winding. In that case the potential of neutral point changes from zero to phase-to-phase-voltage /. 3 Fault current and recommended trip time depend on earthing resistance.

13 Short Time Voltage/Frequency Capability U N = 15,75 kv f N = 50 Hz Continuous operation limits (S1) Voltage max.: +5,0 % 1) Frequency max.: +2,0 % Voltage min.: -5,0 % Frequency min.: -2,0 % 1) 1) In case of overvoltage and underfrequency at the same time the sum of both deviations for continuous operation is limited to: 5,0 % Minimum requirements IEC 34-3 Item 5 Voltage: +/- 5 % Frequency: +/- 2 % Permissible Duration Time [s] ,0 1,1 1,2 1,3 1,4 1,5 Volts per Hertz [p.u]

14 Mechanical Air Gap Moment in Case of 2 poles Short Circuit U N = 15,75 kv f N = 50 Hz Equation for the moment at 2-pole short circuit: M = M 1 *e -t/t1 sin ωt - M 2 *e -t/t2 sin 2ωt + M 3 *e -t/t3 M 1 = 4488 knm T 1 = 0,196 s M peak = 6528 knm M 2 = 2244 knm T 2 = 0,163 s M Nom. = 657 knm M 3 = 930 knm T 3 = 0,241 s Short Circuit Moment [knm] , ,1 0,2 0,3 0,4 0, Time [s] Values based on no load and nominal voltage

15 Short Circuit Currents and Time Constants U N = 15,75 kv f N = 50 Hz > Values based on 100% load and terminal voltage = 1,05 p.u. < Three Phase Short Circuit Asymmetrical Current (Peak) 1) I p = 153,7 ka Asymmetrical Current (RMS) I a = 104,6 ka Symmetrical Current (RMS) 2) I'' i = 60,4 ka DC Current I dc = 85,4 ka Sustained SC Current I s = 10,9 ka Armature Time Constant T a = 0,490 sec Transient Time Constant T' d = 1,492 sec Subtransient Time Constant T'' d = 0,027 sec Line To Line Asymmetrical Current (Peak) 1) I pl = 129,9 ka Asymmetrical Current (RMS) I al = 88,4 ka Symmetrical Current (RMS) 2) I'' il = 51,0 ka DC Current I dcl = 72,2 ka Sustained SC Current I sl = 17,6 ka Armature Time Constant T a = 0,490 sec Transient Time Constant T' dl = 2,295 sec Subtransient Time Constant T'' dl = 0,034 sec Line To Neutral Asymmetrical Current (Peak) 1) I pn = 171,8 ka Asymmetrical Current (RMS) I an = 116,9 ka Symmetrical Current (RMS) 2) I'' in = 67,5 ka DC Current I dcn = 95,5 ka Sustained SC Current I sn = 29,4 ka Armature Time Constant T an = 0,425 sec Transient Time Constant T' dn = 2,730 sec Subtransient Time Constant T'' dn = 0,036 sec 1) = 1,8*sqrt(2)*I k " 2) initial AC short circuit current (Anfangs-Kurzschlusswechselstrom I k ")

16 Calculated Three Phase Short Circuit Decrement Curves U N = 15,75 kv f N = 50 Hz RMS ASYMMETRICAL CURRENT RMS SYMMETRICAL CURRENT DC COMPONENT Current [ka] SUSTAINED SC CURRENT 0 0,0 0,5 1,0 1,5 2,0 Time [s] > Values based on 100% load and terminal voltage = 1,05 p.u. <

17 Calculated Line-to-Line Short Circuit Decrement Curves U N = 15,75 kv f N = 50 Hz RMS ASYMMETRICAL CURRENT RMS SYMMETRICAL CURRENT DC COMPONENT Current [ka] SUSTAINED SC CURRENT ,0 0,5 1,0 1,5 2,0 Time [s] > Values based on 100% load and terminal voltage = 1,05 p.u. <

18 Calculated Line-to-Neutral Short Circuit Decrement Curves U N = 15,75 kv f N = 50 Hz RMS ASYMMETRICAL CURRENT RMS SYMMETRICAL CURRENT DC COMPONENT Current [ka] SUSTAINED SC CURRENT ,0 0,5 1,0 1,5 2,0 Time [s] > Values based on 100% load and terminal voltage = 1,05 p.u. <

19 S for Steam- and Gas-Turbines Information from Erfurt Manufacturing Plant Vibration Limits The vibration limits are kept to zone A of the ISO 7919 and ISO at generator construction and shaft alignment according to manual. For test field conditiones with temporary foundation Zone B can be used. When other (lower) limits specified - e.g. API - project-specific calculations are required. Shaft Vibration Limits - ISO Peak-to-Peak-Values in µm Zone Speed Steam-Turbine Industrial Gas-Turbine Generator Application Generator rpm ISO ISO ISO A B Alarm C Trip Bearing Housing Vibration Limits - ISO v eff in mm/s Zone Speed Steam-Turbine Industrial Gas-Turbine Generator Application Generator rpm ISO ISO ISO A ,8 3,5 4, ,8 3,5 4, ,8 3,5 3, ,8 3,5 3,5 B ,5 11,8 7,1 11 9,3 14,7 Alarm ,5 11,8 7,1 11 9,3 14,7 C ,3 8,5 7,1 11 7,1 11 Trip ,3 8,5 7,1 11 7,1 11 SIEMENS CTA-12-MA-EHP-SK-0086_00 Kaluza Rev. 004 Power Generation (PG) - Erfurt Plant P251 G