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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


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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T1 - Improved direct power control of a grid-connected voltage source converter during network unbalance
A1 - Peng Zhou
A1 - Wei Zhang
A1 - Yi-kang He
A1 - Rong Zeng
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DOI - 10.1631/jzus.C0910702

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


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