特高压直流输电系统交流过电压控制动作策略分析研究

Research on the Strategy of AC Overvoltage Control for UHVDC Power Transmission System

在特高压直流输电工程中,为了防止出现交流母线电压过高继而威胁直流系统稳定运行的情况发生,系统在无功功率控制中配置了交流过电压控制功能。为了解交流过电压控制功能动作特性,该文对特高压直流工程中实际配备的交流过电压控制软件逻辑以及动作策略进行了分析研究,并结合RTDS仿真系统对该工程典型运行工况下的交流过电压情形进行了仿真计算,验证了交流过电压控制功能的有效性,其分析结果对该工程的后续建设及研究具有一定的技术支撑及参考意义。

In the UHVDC transmission project,the overvoltage control function can provide sufficient reactive pow-er for the system and limit the amplitude of AC bus voltage. This article analyzes the action strategies and softwarelogic of overvoltage control,and it uses RTDS simulation system to deliver a simulation technique for various over-voltage situations under the typical operation of the UHVDC engineering,then the effectiveness of the engineering＇sAC overvoltage control is verified through simulation. The analysis of the results has a certain technical support andreference value for the research and construction of Jiuquan-Hunan UHVDC engineering.