考虑换相失败相互影响的多馈入高压直流系统换相失败判断方法

doi:10.19595/j.cnki.1000-6753.tces.190143

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Abstract In the multi-infeed high-voltage DC system (MIDC), the interaction among inverter stations is an important factor that triggers the propagation of commutation failure. In this paper, the transient characteristics of inverter station during commutation failure are analyzed in detail, and the commutation failure component is derived by the switching function model and the dynamic phasor theory. Then, the analytical calculation method is studied to reflect the commutation voltage of each inverter station, considering the mutual influence of AC system fault and commutation failure. On this basis, by comparing the maximum commutation area of each converter valve with the minimum commutation area required for turning off, a commutation failure judgement method is proposed. Finally, the simulation results verify the proposed method.

Key words： Multi-infeed high-voltage DC system mutual influence commutation failure switching function commutation area

Received: 03 February 2019 Published: 24 April 2020

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TM721

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	Articles by authors
	Xu Hanping
	Yang Weichen
	Zhang Dongyin
	Miao Shihong
	Wang Yicong

Cite this article:

Xu Hanping,Yang Weichen,Zhang Dongyin等. Commutation Failure Judgment Method for Multi-Infeed HVDC Systems Considering the Interaction of Commutation Failures[J]. Transactions of China Electrotechnical Society, 2020, 35(8): 1776-1786.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190143 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I8/1776

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