高电压技术2025，Vol.51Issue(2)：828-839,中插23-中插26,16.DOI:10.13336/j.1003-6520.hve.20240949
高压直流输电直流线路故障穿越重启策略
Fault Ride-through Restart Strategy for DC Line Fault of High-voltage DC Transmission
摘要
Abstract
When a DC line fault occurs in a high-voltage DC transmission system,a phase-shifting restart strategy is used to quickly suppress the fault current by controlling the rectifier's phase shift,and after going through the deionization time,the phase shift is released and the high-voltage DC transmission system is restarted.However,when phase-shifting re-starts,both rectifiers and inverters no longer consume reactive power,and the AC filter of the converter station will provide surplus reactive power to the AC system,which is prone to producing overvoltage of the AC system;for the symmetrical single-pole topology,it will also affect the non-faulted line that cannot transmit active power,which will produce a large active power impact on the AC system.This paper proposes a DC line fault ride-through restart strategy.In the event of a DC line fault,by controlling the rectifier and the inverter at both ends of the fault with equal dc currents,the DC current will ride through the fault while controlling the current at the point of fault to be zero,and the reactive power consumption will continue to be maintained to avoid the generation of an overvoltage in the AC system..For the symmetrical single-pole topology,the fault-pole continuation of the current can also be utilized to continue to deliver part of the active power.关键词
高压直流输电/直流线路故障/移相重启/电流控制/穿越重启/交流过电压/去游离时间/直流电弧Key words
high-voltage direct current(HVDC)transmission/DC-line fault/phase-shifting restart/current control/ride-through restart/AC overvoltage/deionization time/DC arc引用本文复制引用
卢东斌,黄志岭,龚飞,李海英,卢宇,凌建..高压直流输电直流线路故障穿越重启策略[J].高电压技术,2025,51(2):828-839,中插23-中插26,16.基金项目
国家自然科学基金青年基金(51607042).Project supported by National Natural Science Foundation of China(51607042). （51607042）
