摘要
基于南方电网直流输电工程中换流阀水冷及其监控系统结构和功能,介绍了南方电网各直流输电系统中由于换流阀水冷监控系统无冗余配置的部分关键传感器故障、部分参数或定值设置不合理、主处理器抗干扰能力差等问题引起误动,造成系统强迫停运的典型案例,运行经验表明,阀水冷监控系统动作的正确率比较低。针对阀水冷监控系统中控制与保护功能在同一套系统内实现、保护功能'一取一'出口逻辑可靠性低、未设置测量值异常的监测功能等设计上存在的缺陷,提出了独立换流阀水冷系统的控制和保护功能、将保护功能出口逻辑改进为'三取二'以及在控制系统中设置测量值异常监视功能等改进措施,有助于确保换流阀水冷系统的稳定运行、提高直流输电系统的可靠性。
Based on the configuration and function of the valve-cooling control and monitoring system used in HVDC transmission projects in CSG,the typical forced outages caused by the mis-operation of the defects of valve-cooling control and monitoring system,such as the faults of the non-redundant sensors,the unreasonable parameters or settings,the weak disturb-resisting capability of main processors,are introduced.The operational experiences show that the reliability of the valve-cooling control and monitoring system should be improved.The improving suggestion,such as isolating the valve-cooling control and protection function,using the selecting 2 from 3 logic in valve-cooling protection system and setting the measurements monitoring function in valve-cooling control system,are given.All of those improving suggestions are valuable to confirm the stability of the valve-cooling system and benefit to improve the reliability of HVDC transmission system.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第16期153-156,共4页
Power System Protection and Control
关键词
直流输电
换流阀水冷系统
监控系统
可靠性
三取二
HVDC
valve-cooling system
control and monitoring system
reliability
selecting 2 from 3
