特高压换流站阀冷系统隐患分析及整改措施

Hidden Danger Analysis and Improvement Measures in the Valve Cooling System of UHVDC Converter Station

针对特高压穗东换流站阀冷系统内冷水流量与压力传感器、外冷水池水位传感器、冗余配置传感器超差跳闸逻辑、跳闸出口回路、直流电源监视回路及交流电源电压监视继电器等方面存在的隐患,分析了阀冷系统的硬件配置和控制逻辑,对隐患进行了整改或提出了临时应对措施,降低了直流系统发生强迫停运的概率,保证了穗东换流站阀冷系统的安全稳定运行,为其他换流站的设计运行维护提供了参考。

In allusion to hidden dangers of the valve cooling system in UHVDC Suidong converter station, such as the water flow and pressure sensor in the DIW main stream, the water level sensor in the spray water tank, excee-ding tolerance trip logic of the redundant sensor, trip circuit, DC power monitoring circuit, AC power supply moni-toring relay, etc.Hardware configuration and control logic of the valve cooling system are analyzed.The paper pro-poses improvement measures to reduce the UHVDC forced outage rate.The results ensure the security and stability of the valve cooling system in Suidong converter station, and provide reference value for equipment manufacture and engineering design.