12相整流发电机接地方式对直流过电压影响的研究

doi:10.19595/j.cnki.1000-6753.tces.L80535

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Abstract In order to effectively suppress DC overvoltage in the occurrence of single-phase grounding fault of the 12 phase generator with rectifier load, an analysis method of the relation between the grounding mode of generator neutral point and DC overvoltage is proposed. First of all, the DC load resistor was converted to resistor in zero sequence circuit by power balance. The zero sequence loop of the non fault winding was analyzed, and the zero sequence voltage of each winding was calculated. Then, through vector analysis method, the line voltage between the phases were calculated and compared in fault state, and the calculation formula of maximum overvoltage on the DC side was obtained. The results show that when resistance is grounded at the neutral point of the generator, the greater the earth resistance is, the smaller the DC side voltage is. Finally, the correctness of theoretical analysis were verified by using simulation and experimental results.

Key words： Generator with rectifier load grounding mode single-phase grounding fault zero sequence voltage DC overvoltage

Received: 29 May 2018 Published: 29 July 2019

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TM711

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	Articles by authors
	Wu Benxiang
	Zhang Xiaofeng
	Chen Liang
	Xu Guoshun
	Li Geng

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Wu Benxiang,Zhang Xiaofeng,Chen Liang等. Researches on Influence of Grounding Mode of 12-Phase Generator with Rectifier Load on DC Overvoltage[J]. Transactions of China Electrotechnical Society, 2019, 34(zk1): 321-326.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80535 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/Izk1/321

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