高压直流输电换流站无功控制系统分析

阐述了无功控制在直流输电换流站中的重要性,介绍了换流站无功控制系统和无功控制的定无功及定电压控制功能。结合南方电网“西电东送”主网架已经建成的3条直流工程换流站中无功控制的应用情况,分析了换流站无功控制与电压控制方式、交流滤波器的配置以及投切控制,通过典型案例分析说明在换流站运行维护工作中无功功率控制应该注意的问题,如在正常情况下,无功控制为自动控制模式,小组交流滤波器为热备用和自动控制模式,此时直流系统运行时严禁将无功控制改为手动模式等。总结了无功功率控制在换流站的运行情况,并针对运行维护中值得注意的问题提出建议,对换流站的建设、运行和维护具有参考价值。

Analysis of Reactive Power Control System for HVDC Power Transmission Converter Station

The paper elaborated the importance of reactive power control in HVDC converter station, and introduced reactive power control system of converter station and control function of constant reactive power and constant voltage. Combined with the application conditions of reactive power control in the 3 projects of HVDC converter station for the main power network frame of "power transmission from west to east" in Southern China Power Grid, the paper analyzed the modes of reactive power control and voltage control, disposition and switching control of AC filter. Through typical case analysis, the problems of reactive power control in operation and maintenance of converter station were explained. If reactive power control mode is automatic control under the normal condition and AC filter is hot for reserve with automatic control mode, the reactive power control cannot be changed to the automatic control mode. The operation condition of reactive power control in converter station was summarized, and the suggestion according to the problem of notice in operation and maintenance was presented, which has reference meaning for construction, operation and maintenance of converter station.