双馈风电系统中VRB储能型网侧九开关变换器

doi:10.19595/j.cnki.1000-6753.tces.170955

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Abstract

Stator side of doubly-fed induction generator (DFIG) wind generation system connects to grid directly, which makes the fault ride through especially important. On the basis of studying a variety of fault voltage compensation schemes and pulse width modulation strategies of nine-switch converter, a novel nine-switch converter is proposed to replace the grid side converter of DFIG system for grid connection control and voltage series compensation. This paper analyzes the mathematical model, modulation strategy, working state and control strategy of grid side nine switch converter, as well as the DC bus voltage distribution and vanadium redox flow battery energy storage circuit model. Then, the simulation model of DFIG system that replaces grid side converter with nine-switch converter is established. A variety of PCC voltage short circuit fault conditions were designed, and the electrical parameters and operating characteristics of the wind generation system were studied. The results show that the nine-switch converter can maintain the voltage stability of the DFIG and realize flexible fault ride through of the double-fed wind turbine under symmetrical and asymmetrical grid voltage faults.

Key words： Nine-switch converter (NSC) doubly-fed induction generation vanadium redox flow battery voltage compensation control strategy wind power generation

Received: 04 July 2017 Published: 28 March 2018

PACS:	TM614
	TM46

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	Lian Maohang
	Ren Yongfeng
	Han Peng
	Ren Yu
	Hu Zhishuai

Cite this article:

Lian Maohang,Ren Yongfeng,Han Peng等. Grid Side Nine-Switch Converter Based on VRB Energy Storage for Doubly-Fed Induction Generator Wind Turbine System[J]. Transactions of China Electrotechnical Society, 2018, 33(6): 1197-1207.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170955 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I6/1197

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