谐波对多馈入直流输电系统换相失败的影响

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Abstract The fundamental reason of the commutation failure caused by harmonics is analyzed based on the mechanism of commutation failure. This paper presents a method of voltage time area, meanwhile defines and calculates the commutation failure critical deviation angle and critical proportion coefficient of 5th, 7th, 11th, 13th order dominant harmonic. In addition, the actual example of Shanghai power grid is given, then through equivalent harmonic model and Ward equivalent algorithm of power network, voltage deviation of the DC access point caused by background harmonic and the critical condition of commutation failure can be calculated by Matlab software, all the results are checked by simulation. Finally, conditions of preventing commutation failure caused by harmonic in engineering are proposed. The conclusions have a practical guiding role on planning and operation of AC/DC power grid.

Key words： Multi-infeed direct current transmission system harmonic interference extinction angle the commutation failure critical proportion coefficient Ward equivalent method

Received: 07 January 2016 Published: 27 February 2017

PACS:

TM712

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	Articles by authors
	Wang Ling
	Wen Jun
	Li Yanan
	Liu Tingting
	Zhao Guopeng

Cite this article:

Wang Ling,Wen Jun,Li Yanan等. The Harmonic Effects on Commutation Faliure of Multi-Infeed Direct Current Transmission Systems[J]. Transactions of China Electrotechnical Society, 2017, 32(3): 27-34.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I3/27

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