±800 kV特高压直流测量系统优化研究

Research on Optimization of±800 kV UHVDC Measurement System

直流测量系统由光电互感器、光电转换模块、传输光纤、测量装置等系统构成,具有结构简单、抗干扰能力强、响应迅速等优点,能满足±800 kV特高压直流控制保护系统的性能和功能需求。介绍了特高压直流系统中光电互感器结构及其测量系统的工作原理,对比了实际工程中的配置情况,针对工程中直流滤波器电流互感器配置不当产生电磁干扰和测量系统滤波回路设计缺陷导致保护误动作等问题进行了分析,研究了相应的优化措施。通过仿真和工程实践验证了优化措施的正确性,可以提高特高压直流控制保护系统的运行稳定水平。

The DC measurement system is composed of photoelectric transformer,photoelectric conversion module,transmission optical fiber,measuring device and other systems.It has the advantages of simple structure,strong anti-interference ability and rapid response,and can meet the performance and functional requirements of±800 kV UHVDC control and protection system.The structure of photoelectric transformer in UHVDC system and the working principle of its measurement system are introduced,and the configurations in practical engineering are compared.The problems of electromagnetic interference caused by improper configuration of DC filter current transformer and protection misoperation caused by design defects of filter circuit of measurement system are analyzed.The corresponding optimization measures are studied.The correctness of the optimization measures is verified by simulation and engineering practice,which can improve the operation stability of UHVDC control and protection system.