采用二极管合环模块供电的110V直流系统隐患分析

Hazard Analysis about 110VDC System Using Diode Closed Loop Module Power Supply

上海±500kV枫泾换流站工程是三沪二回直流输电工程的受端变电站,是外电入沪的重要通道,双极输送功率为3GW,满负荷容量是上海高峰负荷的1/8。通过分析直流保护电源系统以及斯尼文特光电流互感器(TA)极线TA测量屏110V电源系统中使用二极管合环模块存在的供电隐患,提出了确保设备安全运行的改进措施及对策。

The project about the ± 500kV Fengjing converter station in shanghai whose bipolar conveying power is 3GW and full load capacity is 1/8 of the peak load of Shanghai is the end of substations of HVDC transmission from the Three Gorges to shanghai, which is also the important channel which the external electricity from other region entering shanghai. By analyzing the hidden trouble in power supply for using diode closed loop module in DC protection systems as well as Sehniewindt Covent optical current transformer （TA） TA polar measurement screen 110 V power supply system, it puts forward the corresponding measures for improvement and measures to ensure the safe operation of equipment.