Research on the Three-phase Photovoltaic Grid-connected Control Strategy

LIU Yukai; HU Zhijian; ZHANG Ziyong; SUO Jianglei; LIANG Kaibin

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Research on the Three-phase Photovoltaic Grid-connected Control Strategy

LIU Yukai 1 #,HU Zhijian 2 *,ZHANG Ziyong 2,SUO Jianglei 2,LIANG Kaibin 2

1.School of Electrical Enginner,Wuhan University, WuHan 430072

2.School of Electrical Enginner,Wuhan University,430072

*Correspondence author

#Submitted by

Subject:

Funding: Ph.D. Programs Foundation of Ministry of Education of China （No.20110141110032）

Opened online:10 May 2013

Accepted by: none

Citation: LIU Yukai,HU Zhijian,ZHANG Ziyong.Research on the Three-phase Photovoltaic Grid-connected Control Strategy[OL]. [10 May 2013] http://en.paper.edu.cn/en_releasepaper/content/4541473

This paper mainly studies scheduling type photovoltaic generation system, and establishes a three-phase photovoltaic grid-connected model in Matlab/Simulink, which uses the MPPT control that can make full use of the solar energy. At the same time, energy storage device is added. The inverter of the energy storage device adopts V/f control. In the running state of the islanding because of a certain power failure, it can maintain a constant voltage and frequency. The simulation shows that as the output of the photovoltaic power increases, harmonic rate decreases under the same conditions, and the energy storage device can increase the stability of photovoltaic grid and reduce harmonic contents. So it's very necessary to add energy storage device in the photovoltaic system.

Keywords:Photovoltaic grid; energy storage device; PQ control; V/f control; harmonic rate

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