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CLC number: TM314; TM614

On-line Access: 2010-09-30

Received: 2009-11-14

Revision Accepted: 2010-01-29

Crosschecked: 2010-09-03

Cited: 4

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Journal of Zhejiang University SCIENCE C 2010 Vol.11 No.10 P.817-823

http://doi.org/10.1631/jzus.C0910702


Improved direct power control of a grid-connected voltage source converter during network unbalance


Author(s):  Peng Zhou, Wei Zhang, Yi-kang He, Rong Zeng

Affiliation(s):  School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   beatles851@163.com, weizhang@zju.edu.cn

Key Words:  Voltage source converter, Direct power control, Unbalance, Resonant controller


Peng Zhou, Wei Zhang, Yi-kang He, Rong Zeng. Improved direct power control of a grid-connected voltage source converter during network unbalance[J]. Journal of Zhejiang University Science C, 2010, 11(10): 817-823.

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DOI - 10.1631/jzus.C0910702


Abstract: 
This paper deals with an improved direct power control (DPC) strategy for the pulse width modulation (PWM) voltage source converter (VSC) under unbalanced grid voltage conditions. In order to provide enhanced control performance for the VSC, the resonant controllers tuned at the double grid frequency are applied in the DPC design to eliminate the power pulsations and dc link voltage ripples produced by the transient unbalanced grid faults. In this way, the output power and dc link voltage of the VSC can be directly regulated without positive and negative sequential decomposition. As a result, and as has been verified by experiment, the proposed method can provide fast dynamic response with easy implementation.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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