阀冷系统24V电源缺陷引起的直流闭锁及策略优化

The cause analysis and strategy optimization of HVDC blocked by 24V power supply defects in the valve cooling system

以±800 kV特高压直流阀冷系统的一次扰动误出口导致直流闭锁为切入点,详细分析了引起直流闭锁的原因,提出了阀冷系统传感器供电网络布局、传感器信号及控制逻辑的优化方案。该方案已在云广直流输电工程中实际运用,运用结果证明该套优化方案能够减少直流输电工程中因阀冷系统传感器故障而引起的闭锁事件。

In this paper, a disturbance ofe 800 kV Yun Guang UHVDC valve cooling system caused the UHVDC blocked as the break through point. And put forward the optimization scheme of valve cooling system in power supply network, sensor signal sensor layout and control logic. This scheme has been applied in Yun Guang HVDC project, the results prove that the optimized scheme can reduce the blocking events caused by sensor fault of valve cooling system.