高压直流输电工程换流变进线电压互感器断线故障分析

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Abstract In high voltage direct current (HVDC) transmission project, the main function of the converter control system is to carry out closed-loop control of DC current controller, DC voltage controller and arc extinguishing angle controller according to the DC current reference value or DC voltage reference value, and convert the firing angle instructions to firing pulses,which plays an important role in the safe and stable operation of the HVDC transmission system. A case study is made on the incoming potential transformer (PT) fault of converter transformer in Shanbei-Wuhan project. The reason of converter block is analyzed after incoming PT fault. A software optimization scheme is proposed and the original synchronous voltage fault logic is optimized. The experimental results show that the optimized converter control system is able to respond to fault quickly, switch converter control system timely and ensure the stable operation of the DC system.

Key words： high voltage direct current (HVDC) converter control synchronous voltage fault switch

Received: 27 February 2023

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	Articles by authors
	WANG Qiyuan
	JIN Gonglei
	KANG Jingjing
	ZHANG Qingwei
	ZHANG Zipeng

Cite this article:

WANG Qiyuan,JIN Gonglei,KANG Jingjing等. Analysis of incoming potential transformer fault of converter transformer in HVDC project[J]. Electrical Engineering, 2023, 24(5): 71-75.

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http://dqjs.cesmedia.cn/EN/Y2023/V24/I5/71

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