International Journal of Science Engineering and Advance Technology, IJSEAT, Vol 2, Issue 12

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1 Intenational Jounal of Science Engineeing and Advance Technology, IJSEAT, Vol, Iue Decebe-04 itch Contol of DFIG Wind Tubine Baed on Fuzzy Logic Contolle T.Anil Kua, Ch.V.V.Mangalakhi G chola, Dept of EEE, Aitant pofeo, depatent of EEE agati Engineeing College JNTUK, Suapale, A.. Abtact: With ipoveent in vaiable peed yte contol and deign of wind powe yte, the enegy captue of thee yte alo iing. Fo enhance the efficiency and pefoance of wind enegy conveion yte(wecs),in thi pape coe up with itch angle contol of a Doubly FED Induction Geneato(DFIG) baed wind powe yte with the objective of aintain contant powe with vaiable wind peed by uing fuzzy logic contolle. Thi pape peent pincipal conveion of wind enegy, wind tubine lineaization and dynaic odeling ae deived. The fuzzy logic contolle i eployed fo change blade angle of wind tubine and contant powe can be achieve. The block diaga of popoed pitch contol which conit of pitch contolle, actuato odel and tubine lineaized odeled by uing Matlab/Siulink oftwae. Keywod: FLC, C, DFIG, WECS. ugged and iple contuction and good efficiency unde diffeent opeating condition. Induction geneato ae equie low aintenance and le cot. Optiization of vaiable wind enegy can be olved by uing pitch contol with fuzzy logic contolle. II.THEWIND ENERGY SYSTEMS The wind enegy conveion yte fou ajo equipent with a geneato, wind tubine, geabox, inteconnection appaatu and contol yte. Noally wind tubine claified into two diffeent type naely hoizontal and vetical axi type. The wind tubine conit of thee o two blade. The wind geneato opeate with eithe up wind o downwind. Majo wind tubine anufactue have opted gea between high peed thee phae geneato and low wind tubine. Fig. how that Diffeent pitch angle ha been analyzed fo wind tubine. I.INTRODUCTION In enewable enegy ecto wind Enegy ha been the ajo ouce in county. Geneally At vaiable peed and fix peed wind tubine opeate fo geneate powe. The wind genetic phenoenon fo any caue; atopheic peue, tepeatue diffeence and otation foce of eath. Thee eaon poduce the wind peed and powe []. Now day, utilization of wind enegy i inceaed due to clean, fiendly fo envionent, fee and euable eouce. Wind tubine convet wind enegy into electical enegy. By uing echanical equipent convet kinetic enegy fo wind to echanical enegy fo utilization []. Howeve, thee ae any unolved poble in wind enegy. The conventional contolle a well a newly enhanced advanced contolle fo hoizontal, Vaiable peed wind tubine popoed []. Mot of wind plant contuct with Double fed induction Geneato (DFIG).DFIG ued in vaiable peed wind tubine fo geneating contant fequency and voltage in wind powe yte [3]. DFIG ae Fig. Chaacteitic of wind tubine Nowaday, Wind tubine deign uing doubly-fed induction geneato (DFIG) with oto induction geneato and an AC/DC/AC convete vey popula. The winding of tato ae connected diectly to the gid and oto fed at diffeent fequency though age 044

2 Intenational Jounal of Science Engineeing and Advance Technology, IJSEAT, Vol, Iue Decebe-04 AC/DC/AC convete. The DFIG geneato iniize te on wind tubine while low wind peed. Eliination of capacito i anothe advantage DFIG. Alo DFIG ha ability to abob o geneato eactive powe. II.I WIND TURBINE SYSTEM MODEL R V () W Whee R i the wind tubine oto adiu, wind peed i v w. echanical angula oto peed w t of the wind tubine. The wind tubine geneated powe can be deive fo below equation p 3 R C (, ) VW () Whee ( ) i the ai denity, and (A) i the wept aea by the blade, and 5 C (, ) 0.73[ Whee λ I i i.4 3.] e (3) 8.4 i i (4) Fig. Block diaga of the WTGS Fig. how that wind powe geneation, fit it involve the convet the wind enegy into echanical toque by uing wind tubine to gea box than it convent echanical toque into electical powe by uing induction geneato. Due to vaiation in wind powe y due to the input vaiable like wind peed, itch angle and tip atio becaue foce deigne to conide cloe loop contol yte a how in fig. ode to get an effective and contant wind powe. Fo thi vaiable wind peed condition tubine odel i play key ole in powe geneation.[] and [] decibed about wind enegy geneation by uing vaiable and fixed wind tubine, that analyi how that vaiable peed wind tubine give bette epone than the fixed wind peed tubine due to the udden change in wind peed vaiation. Due to eaon in thi pape conide the vaiable peed wind tubine coupled to a DFIG. Alo toque geneated fo the wind tubine can how in below T ARCTV (5) Whee C T can define a C CT (6) II. III. DOUBLY-FED INDUCTION GENERATOR SYSTEM The deigned odel of DFIG baed wind tubine i an available unde Matlab/Siulink. Thi deigned odel iin fig.3 how below and oiginated fo [5], [6], [7]. II.II DYNAMIC MODELING OF THE WIND TURBINE The wind tubine i deigned by dienional le cuve of powe coefficient (C) a function of blade pitch angle (ß) and tip peed atio (λ). In ode to utilize wind enegy optiu λ value hould aintained.theefoe the C value will each axiu value. The atio between the angula oto peed of wind tubine to the linea wind peed at the tip of the blade. It how a below age 045

3 Intenational Jounal of Science Engineeing and Advance Technology, IJSEAT, Vol, Iue Decebe-04 Fig 3 Block Diaga of DFIG baed wind tubine The tato winding tanit electical powe geneated by the wind tubine diven double fed Induction Geneato. DFIG conit of AC/DC/AC convet call oto ide convete (RSC) and tato ide convete (SSC). The GSC convete aintain contant DC-link voltage and the RSC contol eactive active powe of induction achine. The GSC i not ued to inject eactive powe in gid and RSC inject eactive powe independently in to the oto. But, Duing the low voltage and teady tate condition, Reactive powe will geneate by GSC.In dfig oto can capable fo powe flow bidiectional. owe will flow fo the oto to gid when ω>ω, powe will abob the enegy fo gid when ω<ω,.roto aplitude and fequency of gid adjut by uing powe electonic convete. The echanical powe and the tato electic powe output ae coputed a follow: The tato electical powe and echanical powe ae define below (7) M T S T e (8) equation fo lole echanical enegy i j. d T T e dt In tudy tate at fixed peed fo a lole geneato : T e (9) T (0) () Follow T T () S T T ( )* Whee S i defined a the lip of the geneato ( ) e (3) Whee, ech i the extacted echanical powe. i the powe fo the tato to the gid. total i the total geneated electical powe. J i the cobined oto and wind tubine inetia coefficient. i the powe fo the oto to the gid. ω i the ynchonou peed. ω i the oto otational peed. The Matlab/Siulink odel fo popoed yte i how in fig.5. It conit 0MW wind tubine geneato deign of MW wind tubine. The geneated powe i connected to 575KV yte III. ITCH ANGLE CONTROL USING FUZZY LOGIC CONTROLLER Wind tubine conit of geneally thee o two blade, a contolle, a evo oto, a oto otation eno, a geneato and othe echanical coponent. The pitch angle of the blade i contol by evooto. To eaue peed of wind tubine oto otay encode i ued. Fig. 4 how a block Fig. 4 Matlab/Siulink odel popoed pitch contolled DFIG baed wind tubine age 046

4 Intenational Jounal of Science Engineeing and Advance Technology, IJSEAT, Vol, Iue Decebe-04 diaga of wind tubine pitch angle contol uing Fuzzy Logic contolle (FLC) fo le ated wind peed. By contol the blade pitch angle to wind tubine peed i axiize. Fo Fig. 6 oto peed in p fo encode i copaed with efeence peed of oto. The Fuzzy logic contolle conide oto peed eo and change in eo a input. Fig 6 how the fuzzy logic contol yte, conit of Fuzification, Rule baed contol, Deciion aking, Defuzification. Fo thi FLC yte input ae conide a eo in oto peed and change in eo in oto peed. In Fuzification poce the input ae conveted into even linguitic vaiable how in Fig 7 & 8.Fo deciion aking a ueno ethod i ued with 49 ule Fig.9 fuzzy ule ERROR C Eo OUTUT Fig.5 Fuzzy Logic contol Syte Fig 0 Suface view of fuzzy ule Suface view of fuzzy logic ule a how in fig.0. a centoid ethod i ued fo defuzzification. IV. SIMULATION RESULTS Fig.6 pitch angle contolle Fig.7 oto peed eo Siulation Deign of itch contol DFIG Syte a how in Fig 4. In thi yte Five wind tubine, Fo each tubine MW powe will Geneate with 575 V voltage and geneated voltage tep up tanitted fo 30k П- line at 5KV. Finally it will connect gid at 5KV.Fig how geneato voltage, cuent, geneato eal, eactive powe, DC link voltage and oto peed, gid voltage, cuent at diffeent wind peed. Fig. how diffeent Wind Speed. Fo gaph take with epective tie v pe unit value of epective quantity. Fig.8 change in eo in oto peed Fig : Wind Speed of DFIG age 047

5 Intenational Jounal of Science Engineeing and Advance Technology, IJSEAT, Vol, Iue Decebe-04 Fig. Geneato voltage, Cuent, eal, eactive powe, Dc link voltage, Roto peed, Gid voltage and Cuent V.CONCLUSION Thi pape popoe ipleentation of Fuzzy logic contol in pitch angle contol fo DFIG baed wind enegy conveion. Fuzzy logic contol i deign with ugeno 49 ule, it effectively contol the pitch angle to get bette epone in powe geneation and voltage geneation aintained contant value. The Siulation and odeling popoed odel i deigned in Matlab/Siulink oftwae. The iulation eult how that fuzzy contolle effectively egulate pitch angle of wind tubine. VI.REFERENCES Tan. owe Electon., vol. 9, no. 5, pp. 4-49, Sept [4] Boik, S.003.Gid Requieent challenge fo wind Tubine. Billund: Fouth Intenational wokhop on Lage cale Integation of wind powe and Taniion Netwok fo Offhoe Wind fae. [5] Slootweg, J.G., de Haan, S.W.H., olinde, H., and Kling, W.L Geneal odel fo epeenting vaiable peed wind tubine in powe yte dynaic iulation. IEEE Tanaction on owe Syte, Vol.8, No., pp [6] Iov, F., Hanen, A. D., Søenen,., and Blaabjeg, F Wind Tubine Blocket in Matlab/Siulink. Denak: Aalbog Univeity. [7] ena, R., Clae, J.C., and Ahe, G.M Doubly fed induction geneato uing back-toback WM convete and it application to vaiable-peed wind- enegy geneation. IEEE oc.- Elect. owe Appl., Vol. 43, No. 3. [8] Mugica, M.S., Ukiola, A. M., Vidal, M. R., and Redondo, R. R Copaion of Dynaic Space Model fo Wind Tubine Gid Integation Studie. otugal. [9] Akdag, S. A., and Gule, O. 00. Copaion of Wind Tubine owe Cuve Model. Soue, Tuniia: Intenational Renewable Enegy Conge. [0] Bhaanikua, R., Yazhini, A. C., and Kua, A. N.00. Modling and Siulation of Wind Tubine Diven eanent Magnet Geneato with New MT Algoith. Aian owe Electonic Jounal, vol. 4,No:. [] Melicio, R., Mende, V. M. F., and Catalao, J.. S. 009.Copute Siulation of Wind owe Syte : owe Electonic and Tanient Stability Analyi. Kyoto, Japan: Intenational Confeence on owe Syte Tanent(IST009). [] Dffey, C.K Update of haonic tandad IEEE -59: IEEE Recoended actice and Requieent fo Haonic contol in Electic owe Syte. In oc of IEEE :etoleu and Cheical Induty Confeence, pp [] Liuchen Chang Wind Enegy Conveion Syte, IEEE Canadian Review - ping / intep, pp. - 6, 00. [] Abdel Aitouche and Elkhatib Kaal, Intelligent Contol of Wind Enegy Conveion Syte, ISBN: , InTech, 0. [3] Q. Wang and L. Chang, An intelligent axiu powe extaction algoith fo invetebaed vaiable peed wind tubine yte, IEEE age 048