The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid

doi:10.1007/s11633-017-1072-0

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	The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid
	Qiu-Xia Yang; Kun Li; Cui-Mei Zhao; Hu Wang
发表期刊	International Journal of Automation and Computing
ISSN	1476-8186
	2018
卷号	15 期号:6 页码:716-727
摘要	Obvious resonance peak will be generated when parallel photovoltaic grid-connected inverters are connected to the weak grid with high grid impedance, which seriously affects the stability of grid-connected operation of the photovoltaic system. To overcome the problems mentioned above, the mathematical model of the parallel photovoltaic inverters is established. Several factors including the impact of the reference current of the grid-connected inverter, the grid voltage interference and the current disturbance between the photovoltaic inverters in parallel with the grid-connected inverters are analyzed. The grid impedance and the LCL filter of the photovoltaic inverter system are found to be the key elements which lead to existence of resonance peak. This paper presents the branch voltage and current double feedback suppression method under the premise of not changing the topological structure of the photovoltaic inverter, which effectively handles the resonance peak, weakens the harmonic content of the grid current of the photovoltaic grid-connected inverter and the voltage at the point of common coupling, and improves the stability of the parallel operation of the photovoltaic grid-connected inverters in weak grid. At last, the simulation model is established to verify the reliability of this suppression method.
关键词	Parallel photovoltaic grid-connected inverters weak grid, grid impedance resonance peak branch voltage and current double feedback.
DOI	10.1007/s11633-017-1072-0
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/42446
专题	学术期刊_Machine Intelligence Research
作者单位	School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China
推荐引用方式 GB/T 7714	Qiu-Xia Yang,Kun Li,Cui-Mei Zhao,et al. The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid[J]. International Journal of Automation and Computing,2018,15(6):716-727.
APA	Qiu-Xia Yang,Kun Li,Cui-Mei Zhao,&Hu Wang.(2018).The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid.International Journal of Automation and Computing,15(6),716-727.
MLA	Qiu-Xia Yang,et al."The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid".International Journal of Automation and Computing 15.6(2018):716-727.

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