Reactive Power Control of Doubly Fed Induction Generator based Wind Turbine
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1 Intentonl Jounl on Futue Revoluton n Coute Scence & Councton Engneeng ISSN: Volue: 4 Iue: Rectve Powe Contol of Doubly Fed Inducton Geneto bed Wnd Tubne Snjeev Ku Electcl Engneeng Detent, Mhh Mkndehw Engg college Mulln, Abl, Ind-107 e-l: khkwl@gl.co Ahok Ku Electcl Engneeng Detent, Mhh Mkndehw Engg. college Mulln, Abl, Ind-107 e-l:hoko1@yhoo.co Abtct Powe geneton utlzng enewble eouce hve been nceng woldwde vey dly. When uch eouce hve to be ntegted wth extng owe yte then oeton becoe oe chllengeble tcully n te of tblty, ecuty nd elblty. So the ecent gd code tcully etblhed fo lge cle ntegton of enewble owe geneton n the owe yte dend the netwok uot l to conventonl geneto n tedy tte nd dync oeton. The voltge ntblty one of the jo concen wth huge ount of wnd owe enetton n the extng owe yte whch due to nuffcent ount of ectve owe. Moden wnd geneto ued n vble eed lcton equed wth owe electonc convete h cblty to delve/ conue ectve owe l to the conventonl geneto. In eent wok, Ft gd connected DFIG- bed wnd tubne yte nlyzed to enue the ndeendent contol of ctve nd ectve owe, then the ectve owe contol though RSC enued nd Voltge contol ttegy leented tht contol the voltge t ont of coon coulng effectvely. Keywod-Wnd tubne; DFIG; Rectve owe contol; RSC; GSC; Voltge contol; ***** I. INTRODUCTION Rd deleton nd Envonentl concen octed wth fol fuel ttcted the ttenton woldwde towd the develoent of clen nd utnble enegy technology. Aong vou enewble enegy eouce wnd enegy ot ong nd ft develong one. Ind h foth oton n the wold n wnd owe geneton wth the totl ntlled ccty of [1]. In oe ce, owe geneton h eched to the owe utlty level. Due to nceed wnd owe enetton, the oeton of owe yte h becoe oe chllengng tk tcully n te ecuty, tblty, nd elblty []. In ode to ntegte wnd owe genetng yte nto the gd, dffeent gd oeto e develong new gd code ccodng to chctetc of the electc owe gd []. It eque tht lge cle wnd genetng yte ut oete lly to conventonl owe lnt n tedy tte well n tnent condton. The fequency egulton, voltge egulton nd fult de-though (FRT cblty e the n equeent fo wnd owe lnt. vble eed wnd tubne (VSWT nely doubly fed nducton geneto (DFIG nd enent gnet ynchonou geneto (PMSG equed wth owe electonc convete hve the cblty to fulfll gd code equeent to gete extent [4]. In ddton, DFIG bed VSWT h the nueou dvntge uch wde oetng eed nge below nd bove ynchonou eed, oe enegy extcton,, ndeendent contol of ctve nd ectve owe, educed convete ze [5]. Rectve owe cblty of DFIG bed wnd tubne h been detened unde dffeent oetng condton [6-7]. Rectve owe contol ttege e ued n tedy tte nd tnent condton. But voltge vton fo dffeent lodng condton not condeed [8]. In the eent wok, gd connected DFIG-bed wnd tubne yte condeed. The xu owe ont lgoth ued to obtn tck the xu owe dffeent wnd eed oeton. The Roto de convete (RSC contolled n tto flux oented contol nd the gd de convete (GSC contolled n voltge oented contol. The vton n voltge t the ont of coon coulng (PCC occu due to lggng owe fcto lod vton. Voltge contol ttegy leented to contol the voltge t PCC. IJFRCSCE Mch 018, htt:// II. Fgue 1. DFIG BASED WIND TURBINE Genel tuctue of DFIG bed wnd tubne The DFIG equed wnd tubne tuctue hown n fgue 1 tht coe of wnd tubne, DFIG, two bck to bck connected voltge ouce convete nd contol yte. A. Wnd tubne odelng The echncl owe extct fo the wnd tubne exeed [9] Pw 1 R Vw C (, P w (1 Whee = A denty n Kg/, R = Rdu of oto blde, V w = wnd eed n /, C = owe coeffcent, = t 190
2 Intentonl Jounl on Futue Revoluton n Coute Scence & Councton Engneeng ISSN: Volue: 4 Iue: eed to, = tch ngle n deg.the t eed to, gven by R t =, Whee t = Angul eed of wnd tubne. V w c C 6 (, c 1( c c4 c 5 e ( c Whee, c1 0.5, c 116, c 0.04, c4 0, c5 5, c6 (.b The otu electc owe efeence, P ef o electognetc toque efeence, Te ef clculted tkng nto ccount the otl oto eed fo the ncong wnd eed condeng the C- cuve [15-x]. B. Modelng of doubly fed nducton geneto The ynchonouly ottng efeence ued to decbe the equton of DFIGURE The dvntge of tnfong ll the vble n ynchonouly ottng efeence tht the d-q coonent of the vble e te nvnt eultng n le couttonl te equeent fo contol ect. The thetcl exeon of doubly fed nducton geneto: d V R j (. d V R j( (.b (4. (4.b The uect denote ce vecto efeed to ynchonou efeence fe. whee, dd Vd Rd q dq Vq Rq d (5. (5.b dd Vd R d ( d (5.c dq Vq R q ( d (5.d d d d d q q d d d q q q (6. (6.b (6.c (6.d (Vd d Vq q (7. (Vd d Vq q (7.b Q (Vq d Vd q (7.c Q (Vq d Vq d (7.d Te ( qd d q (8 C. Vecto contol ttegy of DFIG Vecto contol (VC technque beng ued fo the ndeendent contol of ctve nd ectve owe [10] VC chee bed on tto voltge oentton (SVC [11] nd tto flux oentton (SFO [1]. In SFO vecto contol technque, the tto flux vecto lgned wth d-x of efeence fe uch tht V 0 (9. d V V (9.b q d q (9.c 0 (9.d Fgue. d-q odel of DFIG n ynchonouly ottng efeence f The tto nd oto thetcl equton of DFIG cn be tnfoed to d-q coonent by ung Pk tnfoton follow: dd Vd 0 Rd q (10. dq Vq V Rq d (10.b d d d (11. 0 (11.b q q q Fo bove equton, we get d d (1. q q (1.b IJFRCSCE Mch 018, htt:// 191
3 Intentonl Jounl on Futue Revoluton n Coute Scence & Councton Engneeng ISSN: Volue: 4 Iue: / (1 ( (14. d d d q q (14.b V q (15. V Q V (15.b d owe coeondng to gven wnd eed. The wnd eed ket 10 / eultng n ue ynchonou eed oeton of geneto hown n fgue 5 Fgue 5. Vble eed oeton of DFIG n Sue ynchonou ode Fgue. Roto de convete contol Fgue 6. GSC contol n ue ynchonou ode Fgue 4. Gd de convete contol III. ANAYSIS OF DFIG BASED WIND TURBINE UNDER VARIABE SPEED CONDITIONS A. Sue ynchonou eed oeton The xu owe ont tckng lgoth ued to obtn otu toque efeence n ode to tck xu owe coeondng to gven wnd eed. The wnd eed ket 10 / eultng n ue ynchonou oeton of geneto hown n fgue5. The tto ctve owe ndeendently contolled by the q-x oto cuent coonent, Iq, ccodng to (15. whee d-x oto cuent coonent, Id, zeo no ectve owe contol condeed t th oent. When the oto eed eche becoe oe thn ynchonou eed, then q-x oto voltge chnge t gn. So, n th ode of oeton, geneted owe flow fo tto well fo oto to gd v oto de convete nd gd de convete enued by GSC d-x oto cuent hown n fgue 6. The xu owe ont tckng lgoth ued to obtn otu toque efeence n ode to tck xu Fgue 7. Vble eed oeton of DFIG n ub ynchonou ode Fgue 8. GSC contol n ub ynchonou ode B. Sub ynchonou eed oeton The wnd eed ket 6 / nd the oto eed en below the ynchonou eed hown n fgue 7. A thee IJFRCSCE Mch 018, htt:// 19
4 Intentonl Jounl on Futue Revoluton n Coute Scence & Councton Engneeng ISSN: Volue: 4 Iue: no chnge n the gn of q-x oto voltge, the geneted owe flow only fo tto to gd nd oto tke the owe fo gd though the RSC nd GSC. The dc lnk voltge contnt whch enue the ooth flow of owe though dc lnk n ethe decton hown n fgue 6 nd fgue 8. IV. REACTIVE POWER CONTRO The tto ectve owe (Q contolled though RSC. The d- x oto cuent coonent, Id contol the ectve owe. Fo the fgue 9, Id cuent zeo nd tto gnetzed by bobng the ectve owe fo the gd. At te, Id contol the efeence vlue of tto ectve owe, Q whch ket zeo. The ectve owe efeence ket -500 KVAR nd +500 KVAR t te nd eectvely. The oto cuent coonent,id tck the efeence vlue of Q hown n fgue 10. The tto ctve owe (P nd oto cuent coonent, Iq en contnt dung the whole oeton enung the ndeendent contol of tto ctve nd ectve owe. Fgue 10. Stto ectve owe contol Fgue 9. Stto gnetzton though gd nd RSC Fgue 11. Voltge t cc nd ectve owe wthout voltge contol Fgue 1 Voltge t cc nd Rectve owe wth voltge contol V. VOTAGE CONTRO AT PCC A. Voltge t PCC wthout voltge contol ttegy The vton of voltge t the PCC due to the vton n lggng owe fcto lod tht ncee t te 1,,nd nd decee t te 4 hown n fgue 11. The tto ectve owe zeo no voltge contol condeed. IJFRCSCE Mch 018, htt:// 19
5 Intentonl Jounl on Futue Revoluton n Coute Scence & Councton Engneeng ISSN: Volue: 4 Iue: B. Voltge t PCC wthout voltge contol ttegy Voltge contol though RSC leented to contol the voltge t PCC. The fgue how tht voltge t PCC contolled effectvely by contollng the tto ectve owe. Pete TABE 1. PARAMETERS OF DFIG Decton vlue P Nonl tto ctve owe MW V Nonl tto voltge 690 V f Nonl fequency 50 Hz R Stto etnce 0.06 Ω R Roto etnce 0.09 Ω l Stto lekge nductnce H l Roto lekge nductnce H Mgnetzng nductnce.5 H Pole u Stto to oto tun to 1/ [8] M. Kykc nd J. V. Mlnovc, Rectve owe contol ttegefo DFIG-bed lnt, IEEE Tncton on Enegy Conveon., vol., no., , Feb [9] Elbet Bogleck, Mch Koeck, Contol of ectve owe n double-fed chne bed wnd k, IEEE Confeence on Powe Electonc nd Dve Syte, , 008. [10] Dongkyoung Chw, Kyo-Beu ee, Vble tuctue contol of the ctve nd ectve owe fo DFIG n wnd tubne, IEEE Tncton on Induty Alcton, vol. 46, no. 6, Nov/Dec 010. [11] Gonzlo Abd, Doubly fed nducton chne odelng nd contol fo wnd enegy geneton, IEEE Pe ee on owe engneeng, John wley & on 011 [1] e Xu, Phll Ctwght, Dect ctve nd ectve owe contol of DFIG fo wnd enegy geneton, IEEE Tncton on Enegy Conveon, vol. 1, no., , Set VI. CONCUSION In the eent ceno, the enetton of enewble enegy eouce nceed to uch lge cle ong oe chllenge to the owe utlty. Voltge ntblty one ong the vou chllenge tht need to be contol. Moden vble eed wnd tubne h the cblty to genete/bob ectve owe though owe electonc convete long wth flow of ctve owe. In the eent wok, ndeendent contol of ctve nd ectve owe enued n gd connected DFIG-bed wnd tubne yte. Then the ectve owe contol enued fo dffeent efeence vlue of ectve owe. Alo voltge contol ttegy ung ectve owe contol though RSC leented tht eult n the effectve contol of voltge t PCC. REFERENCES [1] Reot on the wnd owe-wnd enegy ket ntellgence, Ind. Onlne: [].Xe et.l, Wnd ntegton n owe yte: oetonl chllenge nd oble oluton, IEEE Poceedng, vol. 99, no , Jn [] M.Tl nd S. Pthnou, A evew of gd code techncl equeent fo wnd F, IET Renewble Powe Geneton, Vol., no.,. 08, Set. 009 [4] T. Ackenn, Ed., Wnd Powe n Powe Syte, Wet Suex, U.K.:Wley Publcton, 005. [5] S. Mulle, M. Decke nd R.W. De-doncke, Doubly fed nducton geneto yte fo wnd tubne, IEEE Indutl Alcton Mgzne,. 6, My/June 00. [6] Snjeev ku, Ovee ngh, S. K. Aggwl, cotve tudy fo ectve owe cblty of doubly fed nducton geneto nd ynchonou geneto, IEEE confeence on contol, coutng, councton nd tel (ICCCCM, Oct. 016 [7] Bht Sngh nd S. N. Sngh, Rectve cblty ltton of doubly-fed nducton geneto, Electc Powe Coonent nd Syte, vol. 7, no. 4, , 009. IJFRCSCE Mch 018, htt:// 194
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