3 29 EL ECR ICMACH IN ESANDCON ROL Vol3 No Jan. 29, 2,, (., 224; 2., 232) :,,,,,,,, :; ; ; ; : M35 : A : 7-449X (29) - 57-6 Exact linearization control cheme of DFIG GUO J ia2hu, 2, ZHANG Lu2hua, CA I Xu (. W ind Power Reearch Centre, Shanghai J iao ong Univerity, Shanghai 224, China; 2. Department of Automation, Anhui Univerity of Science and echnology, Huainan 232, China) Abtract: he traditional vector control of double fed induction generator (DF IG) baed on imp lified model ha no good performance and can not guarantee a ufficient tability region in the tate pace. In thi paper, a novel control trategy by internal model control baed on the invere ytem theory wa p ro2 poed. On the bai of on nonlinear mathematical model of DF IG which developed w ith tate variable, theorder invere ytem of DF IG wa derived and a p eudo linear ytem wa obtained with invere y2 tem method. he InternalModel Control ( IMC) wa ued for the p eudo linear ytem to imp rove the ro2 butne. hi control trategy wa able to decoup le the active and reactive tator current allow ing the in2 dependent control of the active power and reactive power of DF IG w ith a ufficient tability region in the tate pace. he experimental reult verified the validity of the p ropoed control trategy. Key word: double fed induction generator; decoup ling control; invere ytem ; internal model control; exact linearization,, [ - 6 ], [ 3-6 ] : 28 - - 6 : ( KJ27B6) ;(5DZ2) : (974 - (98 - (964 - ),,,,,; ),,,,; ),,,, 994-29 China Academic Journal Electronic Publihing Houe. All right reerved. http://www.cnki.net
58 3,,PWM,L L l + L m, L r L lr + L m ; [ 2-4 ],,, - r, r ; J,,, [ 5 ], ; L ; e ; n p ; m, 4, 5,5, i d i q, i rd i rq, r, x x x 2 x 3 x 4 x 5 i d i q i rd i rq r R n R 5 (5),,,,, v d v q, L,, [ 7 ] u rd u rq,, v, d v q,; L,,,;,, [ 5-2 ] u rd u rq,, u u u 2 u rd u rq R m R 2 (6),, 2 dx L 2 [ R L r x - ( L L r - L 2 m ) x 2 -,,,,,,,, v R i + d v r R r i r + d r + j, + j r r ; L i +L m i r, r L m i +L r i r ; e () (2) n p Im [ m i 3 r ], (3) 994-29 China Academic Journal Electronic Publihing Houe. All right reerved. http://www.cnki.net J n p d r e - L (4) : r; v ; i; ; L L m dx 2 dx 3 dx 4 dx 5 R r L m x 3 - r L m L r x 4 - L r v d +L m u ], (7a) L 2 m [ ( L L r - L 2 m ) x + R L r x 2 + - L L r r L m L r x 3 - R r L m x 4 - L r v q +L m u 2 ], (7b) [ - R L 2 L m x + r L m L x 2 + R r L x 3 + ( L 2 m - L L r ) x 4 +L m v d - L u ], (7c) L 2 [ - r L m L x - R L m x 2 - ( L 2 m - L L r ) x 3 +R r L x 4 +L m v q - L u 2 ], (7d) n p J ( e - L ) (7e)
59 3 3,,,,,,, p 5 ( u d i d + u q i q ) 5u d i d, q 5 ( u q i d - u d i q ) - 5u d i q (8) (8),d2q, y y y 2 h ( x) h 2 ( x) i d i q R m R 2 (9) [ 2 ],, y y2 k x - k 2 x 2 - k 3 x 3 - k 4 x 4 - k 5 u d k 2 x + k x 2 + k 4 x 3 - k 3 x 4 - k 5 u q + u u 2 () : k R L r L 2, k 2 L L r - L 2 m L 2, k 3 R rl m L 2, k 4 L r rl m L r L 2, k 5 L 2, L 2 m L m - L L r 2, 5 5u [ f k h i ], k,,, i - ; 5 5u [ f k h i ], k i f h i ψ def 5 5x h i f, f k h i ψ def f ( f k - h i ), k, f h i ψ def h i (), () u, 5 5u ( y y 2 ),, () ( 2 ) u u 2 - k x + k 2 x 2 + k 3 x 3 + k 4 x 4 + k 5 u d - k 2 x - k x 2 - k 4 x 3 + k 3 x 4 + k 5 u q (2) 2 (2),, G ( ) y y 2 + (3) 2 F ig. Peudo linear ytem of D F IG,u u rd u rq y i d i q, 32,,,,,, (MPC),,,, (3), G^ ( ) (4) 994-29 China Academic Journal Electronic Publihing Houe. All right reerved. http://www.cnki.net
6 3 G^ ( ),, G c ( ) G c ( ) F ( ) G^ - ( ) (5),, G ( ) G^ ( ),,, G ( ), G ( ) ^ G ( j) : G ( j) - G ( j) G^ ( j) l m ( j) l m ( j) (6) : l m ( j); l m ( j) e( ) lim - F () +F ()G^ - () [G () - G^ () ] [ - D () ] (2),,, r i 3 d, r 2 i 3 q,, (8), ( 8),,, P I,2 G c ( ) F ( ) G^ - ( ),, [ ], F ( - j) G^ ( j) G^ ( j) l m ( j) F ( j) l m ( j) (7),, F ( ), F ( ), G c ( ),, F () diag(f (), f 2 () ) diag +, 2 + (8), 2, E ( ) R ( ) - Y ( ) - G c () G^ () [R () - D () ] +G c () [G () - G^ () ] (9) D ( ),, e() lim - F () +F ()G^ - () [G () - G^ () ] R () ; R ( ), (2) 2 F ig. 4 2Con trol chem e of the D F IG 6 kw 6 kw PWM, 6 kw, dspace5 3 4 3,, kw, 4, kvar, kw, 994-29 China Academic Journal Electronic Publihing Houe. All right reerved. http://www.cnki.net
6 5 6 5 5 kw 5 kw, kvar 6, kvar5 kvar,,,,,,,,,,, 994-29 China Academic Journal Electronic Publihing Houe. All right reerved. http://www.cnki.net
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