低电压穿越控制下双馈风电机组短路电流特性与计算方法

doi:10.19595/j.cnki.1000-6753.tces.160823

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Abstract The fault characteristics of power system is being changed by the large-scale application of doubly fed induction generator (DFIG) in wind generation. Thus, the relay protection of power system is restricted. Many researches on fault characteristics of DFIG have been conducted, but the influence of low voltage ride through (LVRT) was excluded. This paper studies the short-circuit current contributed by DFIG under LVRT control, with the emphasis on the effects of reactive power on terminal voltage. The coupling mechanism between the winding reaction and LVRT control is taken into account. The expressions of short-circuit currents before and after the LVRT control were presented by constructing the vector model of DFIG operated with LVRT control. The influence on short-circuit caused by the reactive power and its trigger time under LVRT control was analyzed. The equivalent models of DFIG before and after LVRT control were then built. Finally, the calculation method of short-circuit current of a doubly-fed wind power system was proposed.

Key words： Wind generation, doubly fed induction generator (DFIG), short-circuit current, fault analysis, lower voltage ride through (LVRT)

Received: 02 June 2016 Published: 05 December 2017

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TM744

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	Articles by authors
	Ouyang Jinxin
	Tang Ting
	Zheng Di
	Ren Wenjun
	Xiong Xiaofu
	Zeng Jiayong

Cite this article:

Ouyang Jinxin,Tang Ting,Zheng Di等. Characteristics and Calculation Method of Short-Circuit Current of Doubly Fed Wind Generator under Lower Voltage Ride Through[J]. Transactions of China Electrotechnical Society, 2017, 32(22): 216-224.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.160823 OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I22/216

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