PERFORMANCE ANALYSIS OF DOUBLY- FED INDUCTION GENERATOR FOR WIND ENERGY CONVERSION SYSTEM

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1 The 5 th PSU-UNS Intenatonal Confeence on Engneeng an 53 Technology (ICET-11), Phuket, May -3, 11 Pnce of Songkla Unety, Faculty of Engneeng Hat Ya, Songkhla, Thalan 911 PEFOMANCE ANALYSIS OF OUBLY- FE INUCTION GENEATO FO WIN ENEGY CONVESION SYSTEM Sath Chouhuy 1*, Kanungo Baaa Mohanty, B.Chtt Babu 3 1 Natonal Inttute of Technology oukela, Stuent, Oa, Ina Natonal Inttute of Technology oukela, Aocate Pofeo, Oa, Ina 3 Natonal Inttute of Technology oukela, Atant Pofeo, Oa, Ina *Eal:chouhuy.ath@yahoo.co Abtact- Th ae eent oltage fe cuent egulate oto-e an g-e contol of oubly-fe nucton geneato (FIG) une teay an tanent conton. The ecto contol of g-e ae to contol the acte an eacte owe flow fo the utlty g to the g e conete neenently an alo antan the c-lnk oltage contant. Machne-e contol egulate the ee of the e oe thu akng the yte utable fo aable ee alcaton. The oltage contol, cuent contol an ee contol loo ue PI contolle. Key Wo: oubly-fe Inucton Geneato, Vecto contol, PWM Conete, G-e conete, Machne-e conete 1. NOMENCLATUE, q ae the thee hae tato oltage n -q efeence fae eectely α, β ae the thee hae tato oltage n α-β efeence fae eectely, q ae the thee hae tato cuent n -q efeence fae eectely α, β ae the thee hae tato cuent n α-β efeence fae eectely, q, ae the thee hae oto oltage n -q efeence fae eectely α, β ae the thee hae oto oltage n α-β efeence fae eectely, q ae the thee hae oto cuent n -q efeence fae eectely α, β ae the thee hae oto cuent n α-β efeence fae eectely Ψ, Ψ q ae the tato flux lnkage n -q efeence fae eectely Ψ α, Ψ β ae the tato flux lnkage n α-β efeence fae eectely Ψ, Ψ q ae the oto flux lnkage n -q efeence fae eectely Ψ α, Ψ β ae the oto flux lnkage n α-β efeence fae eectely, l ae the ynchonou ee an l ee eectely. P, Q ae the tato e acte an eacte owe eectely, ae the achne etance e hae l, l ae the achne leakage eactance e hae the achne utual eactance e hae b the bae fequency the angula oto ee P the nube of ole T e the electoagnetc toque. θ e the angula oton of the uly oltage θ the tato flux ecto oton. INTOUCTION a eeloent n cence an technology hae wtnee a atou effect on enonent. Th ue ae nce oe ecae an eflecte a a ajo agena n Kyoto otocol an any othe clate change ut. Coneaton of non-enewable eouce otate to exloe the new aenue of eouce fo electcty geneaton whch ean tll ate a lage ollute when coal lke atte ue. Inucton achne a a geneato ha coe a long way an efeable oe ynchonou an c geneato fo t obou aantage. Fo tan-alone to g connecte a woun oto achne a a oubly fe nucton geneato ganng goun n any wn fa an hyel geneaton. The contol aect of FIG ece

2 533 by two back to back conete lace on oto e. In th, contant-fequency ac g ae ue, wheea ay echancal owe ouce uch a a c achne uually oeate at aable ee. Inee, they ae ue n all-cale geneato n wnll fo ntance. Howee, ecfc alcaton, uch a acaft, eque hghe leel elablty an/o long-te antenance eocty. The oubly fe nucton achne ung an AC-AC conete n the oto ccut (Schebu e) ha long been a tana e oton fo hgh-owe alcaton nolng a lte ee ange. The owe conete nee only be ate to hanle the oto owe [1]. To atfy the g coe equeent of wn tubne, uually g e conete layng a ajo ole []. Ineenent contol of acte an eacte owe fo the g o to the g oble by ecto contol of lne e conete [3]. A cuent fe nete contolle FIG wth a aable oto e fequency exlane fo enegy ecoey n [4]. The aantage of enegy ecoey chee whch ue natually coutate conete ccut whch affect the outut chaactetc of FIG yte oeatng n ub ynchonou an ue ynchonou egon cue n [5]. The teay tate analy of a FIG exlane by leentng a cuent contolle cyclo-conete [6]. Otal toque ee ofle of a wn tubne tacke by a tato fel oente contol tategy fo a FIG yte [7]. Whle the aboe ae cue teay tate analy though ffeent contol tatege th ae focue on tanent analy ung a back to back IGBT bae oltage fe PWM conete connecte to oto e of woun oto nucton achne. 3.MOELING OF FIG A 1 h.. woun oto nucton achne whoe aaete etal ae gen n Table 1, oele n ynchonou efeence fae. The cheatc aga of the oeall yte hown n Fg.1. Two oltage fe PWM conete ae ue n the oel, one ue n the g e an othe n the achne e. The objecte of g e conete to antan c-lnk oltage contant an the achne e conete contol to egulate the ee of the e oe thu akng the yte utable fo aable ee alcaton yte. The etale oel gen n equaton 1. Snce the achne aaete ae nealy alway gen n oh, t conenent to exe the oltage an flux lnkage equaton n te of eactance athe than nuctance. If the cuent ae electe a neenent aable an the flux lnkage e econ elace by the cuent [8], the oltage equaton becoe q q = [ A] (1) q q Whee A equal to b l Whee = l, = l, = The flux lnkage e econ ay be exee a equaton. q q = [ B] () q q Whee B equal to l l If the flux lnkage ae electe a neenent aable then equaton. ay be ole fo cuent an wtten a l Fgue 1. Oeall FIG Syte Whee C equal to q q C = q q (3)

3 534 Whee = l l Subttutng the alue of cuent fo equaton.3 n equaton.1 yel the oltage equaton n te of flux lnkage a gen by equaton.4. q = q Whee equal to b [ ] l 4πf Whee b = πf = P q q 4.GI SIE CONVETE CONTOL (4) l A oubly fe nucton achne contolle to be oeate a a g connecte nucton geneato. To ake the achne to geneate the oeatng l to be ae negate. At the ae te the owe fe back to the tato tenal an to the utlty g. 3 = ( qq) (5) 3 Q = ( q q) (6) The angula oton of the uly oltage calculate a 1 β θ e = e = tan (7) α Whee α an β ae the, α, β tato oltage coonent. Algnng the -ax of the efeence fae along the tato-oltage oton gen by eqn.7, q zeo, an nce the altue of the uly oltage contant contant. The acte an eacte owe wll be ootonal to an q eectely. The contol chee thu utlze cuent contol loo fo an q wth the ean beng ee fo the C-lnk oltage eo though a tana PI contolle. The q ean etene the laceent facto on the uly-e of the nucto. The tategy hown n Fg.. Fo eqn. (8) the lant fo the cuent contol loo gen by ( ) ( ) q 1 F( ) = = = (8) L ( ) q ( ) Whee an L ae the choke etance an nuctance eectely. The efeence oltage * 1 an * q1 fo the uly e conete foun ung eqn. (9) an (1). Whee backete te ae the oltage coenaton te. = L (9) * 1 * q1 ( ) q q = L (1) Fgue. Vecto contol tuctue fo g e conete 5.MACHINE SIE CONVETE CONTOL The achne e conete contol tategy [1] goene by the followng equaton. = = L L (11) q L = σl (1) L = σl (13) q q q L = q (14) L = σl lσlq (15) q = q σ L l( L σl) (16) ( ) 3 1 Te = q q (17) Whee = l L L σ = 1 L = L L L The tato flux angle calculate fo α = ( α α) (18) β = ( β β) (19)

4 Stato Cuent Te n Secon β θ = tan () α Whee, the tato-flux ecto oton, the toque ootonal to q an can be egulate ung q. The oto exctaton cuent contolle ung. Fo conete 6.SIMULATION ESULTS AN ISCUSSION The oeall yte ulate wth MATLAB/SIMULINK enonent une teay tate.e. balance g uly an tanent tate.e. oltage ag occu n the g e ue to tubance n the utlty g an alo a coaon ha been ae between the eult obtane n thee aboe entone tate. 6.1.Sulaton une balance g uly the oto-oltage equaton gen n eqn. (15-16) we hae = σl (1) q q = q σl () The -q ax efeence oltage * an * q fo the achne e conete foun ung eqn. (3) an (4). * = lσl q (3) * = q l( L σl ) q (4) Fg. 3 how a cheatc block aga fo the achne contol. The efeence q-ax oto cuent obtane fo an oute ee-contol loo. A la analy fo the contol of the q cuent cae out fo the uly-e conete can lkewe be one fo the contol of the q oto achne cuent. Fgue 3. Vecto contol tuctue fo achne e Fgue 4. Sulaton eult une balance g uly The ulaton eult how the chaactetc waefo of the tato oltage, tato cuent, acte owe, eacte owe, c-lnk oltage, oto ee eectely fo to to botto n the Fg.4 une teay tate conton. It obee that the acte an eacte owe ule by the utlty g ae ecoule an c lnk oltage antane contant ue to the contol tategy ae n the g e conete. 6.. Sulaton une oltage ag Vabc n Volt Iabc n aee P n watt tato Voltage Te n Secon Stato Cuent Te n Secon Acte owe Vabc n Volt Stato Voltage Te n Secon eacte Powe Te n Secon Q n Va Iabc naee Te n Secon c lnk oltage P n Watt Q n Va Acte Powe Te n Secon eacte owe w n Vc n olt Te n econ oto ee Te n econ c lnk Voltage Te n econ Fgue 5. Sulaton eult une oltage ag Vc n olt Te n econ oto ee 11 The ulaton eult how the chaactetc waefo of the tato oltage, tato cuent, acte owe, eacte owe, c-lnk oltage, oto ee w n Te n econ

5 536 eectely fo to to botto n the Fg.5 une oltage ag. It obee that the FIG yte ouce acte owe of about 4kW whch coeon to axu echancal tubne outut nu electcal loe n geneato. When the g oltage change uenly fo t ate alue.e.415v the cuent nceae an the acte owe P uenly ocllate an then t ettle to t ate alue. The c lnk oltage et at 55V by the g e conete but at the te of oltage ag t ocllate an fnally ettle to t et alue an the oto ee alo antane contant to t ate (11) In Fg.5 the behao of V abc, I abc, P, Q, V c, obee at.5 when the oltage eceae to 8%. 7.CONCLUSION A FIG yte wth a back-to-back conete at the oto en ulate ung PI contolle. The yte efoance analy one une teay tate an fo a uen change n g oltage. The geneate tato oltage an cuent, acte owe ule to g, VA equeent fo the FIG ae obee an t conclue that wth the leente ecto contol tategy, the oubly fe nucton geneato yte une ulaton tuy utable une uen change n g oltage. [3]S.. Jone, an. Jone, Contol tategy fo nuoal uly e coneto, IEE Colloquu on eeloent n eal te contol fo nucton oto e, Febuay 1993, get 1993/4. [4]G. A. Sth, K. Ng, an A. Sth, Wn-enegy ecoey by a tatc Schebu nucton geneato, IEE Poc. C, 1981, 18, (6), [5]I. Cac, an M. E, ouble-outut nucton geneato oeatng at ub ynchonou an ue ynchonou ee teay tate efoance otzaton an wn-enegy ecoey, IEE oc. B, 199, 139, (5), [6]M. Mochou,. Leoeuff, F. M. Sago, an M. Chekaou, Steay tate analy of a oubly fe aynchonou achne ule by a cuent contolle cyclo conete n the oto, IEE Poc. B, 199, 139, (), [7]Y. Tang, an L. U, Stato fel oente contol of oubly excte nucton achne n wn owe geneatng yte, 35 th M-Wet Sy. on Ccut an yte, Wahngton, C, 199, [8]P. C. Kaue, O. Waynczuk, an S.. Suhoff, Analy of electc achney an e yte A John Wley & Son, INC, Publcaton,, Table 1. Machne Secfcaton ate Powe Stato Voltage 1h 415V (Stato etance) 1.11Ω (oto etance).9ω L (Stato Inuctance).3H L (Mutual nuctance) L (oto nuctance).8h(efee to the oto).9h(efee to the oto) Pole 6 ate ee 11 Stato-oto tun ato 1.5 Stato connecton oto Connecton Sta Sta 8.EFEENCES [1]. Pena, J. C. Clae, an G. M. Ahe, oubly fe nucton geneato ung back-to-back PWM conete an t alcaton to aable-ee wnenegy geneaton, IEE Poc. Elect. Powe Al., May 1996, Vol. 143, No. 3, [] F. Blaabjeg,. Teooecu, M. Lee, A. V. Tbu, Oeew of Contol an G Synchonzaton fo tbute Powe Geneaton Syte IEEE Tanacton on Inutal Electonc, Iue: 5, 6 Vol.:53,