DocumentCode :
3233993
Title :
Active damping control of PMSG with LCL filter in tidal generation system
Author :
Luo Yaohua ; Duan Xiaoli ; Xu Tieyan ; Lv Shijia
Author_Institution :
Coll. of Autom., Harbin Eng. Univ., Harbin, China
fYear :
2012
fDate :
18-20 Sept. 2012
Firstpage :
1
Lastpage :
4
Abstract :
This paper has researched on the control strategy of PMSG direct-drive tidal generation system with LCL filter. Firstly, the model of PMSG (permanent magnet synchronous generator) with LCL filter is established in dq-frame, and then according to the analysis of the model, the equivalent circuit and admittance seen from the converter side in dq-frame is obtained. The bode figure shows that the LCL filter may resonance the harmonic current and even break the stability of whole system. One way to restrain the resonance is in parallel or in series a resistance with the capacitor in AC filters which is called passive damping. However, the physical resistance in passive damping will cause the energy loss. So an active damping strategy using a virtual resistance parallel with capacitor in LCL filter is proposed to restrain the resonance and reduce the stator current THD. Based on the active damping, the control system of PMSG is designed, in which the rotor speed is controlled and the unity power factor is realized. Finally, the simulation results have verified the effectiveness of the proposed control strategy.
Keywords :
angular velocity control; control system synthesis; damping; harmonic distortion; machine control; permanent magnet generators; power harmonic filters; synchronous generators; tidal power stations; AC filters; LCL filter; PMSG direct-drive tidal generation system; active damping control; control strategy; control system design; dq-frame; energy loss; equivalent circuit; harmonic current; passive damping; permanent magnet synchronous generator; rotor speed control; stator current THD reduction; unity power factor; virtual resistance; Capacitors; Damping; Power harmonic filters; Rectifiers; Resistance; Rotors; Stators; PMSG; PWM rectifier; active damping; tidal generation system;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering and Automation Conference (PEAM), 2012 IEEE
Conference_Location :
Wuhan
Print_ISBN :
978-1-4577-1599-0
Type :
conf
DOI :
10.1109/PEAM.2012.6612521
Filename :
6612521
Link To Document :
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