电力系统保护与控制2024，Vol.52Issue(24)：53-63,11.DOI:10.19783/j.cnki.pspc.240384
基于不平衡无功与触发角误差补偿的直流输电系统送端交流暂态过电压控制方法
A suppression method for sending-end transient overvoltage of LCC-HVDC based on the compensation of unbalanced reactive power and firing angle error
摘要
Abstract
Line-commuted converter-based high voltage direct current(LCC-HVDC)is prone to commutation failure,causing transient overvoltage at the AC bus of the rectifier station.Given that AC transient overvoltage can threaten the safe operation of the sending-end system,an AC transient overvoltage control method of the LCC-HVDC sending-end system is proposed.First,the influence of the phase locking error of the rectifier station on the firing angle control is analyzed by analyzing the characteristics of the transient overvoltage during commutation failure,and the influence of the phase locking error on the AC transient overvoltage of the rectifier station is quantified.Then,the threshold DC current calculation method for compensating the unbalanced reactive power of the rectifier station is proposed based on the reactive balance relationship between the sending and receiving ends.Next,a calculation method of firing angle command value for compensating the dynamic error of firing angle is proposed.The control method for sending-end AC transient overvoltage based on the compensation of unbalanced reactive power and firing angle error is proposed.Finally,simulation cases demonstrate that the AC transient overvoltage of LCC-HVDC sending-end system can be effectively suppressed by the proposed method.关键词
LCC-HVDC/暂态过电压/锁相偏差/直流电流控制/触发角控制Key words
LCC-HVDC/transient overvoltage/phase locking error/DC current control/firing angle control引用本文复制引用
欧阳金鑫,陶睿,潘馨钰,肖超,郭春义,庞茗予..基于不平衡无功与触发角误差补偿的直流输电系统送端交流暂态过电压控制方法[J].电力系统保护与控制,2024,52(24):53-63,11.基金项目
This work is supported by the National Key Research and Development Program of China(No.2023YFB2406802). 国家重点研发计划项目资助(2023YFB2406802) （No.2023YFB2406802）
河南省电力公司科技项目资助(521702230008) （521702230008）
