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针对±800 kV云广特高压直流控制系统功能相对复杂、各个控制环节设置较传统直流输电工程有很大区别的问题,介绍和分析了其控制系统各控制环节的设置,如控制器选择功能、站间电流控制协调功能、电流裕度补偿功能、电流误差控制环节、低压限流功能与暂态故障恢复;特殊控制环节设置,如电压平衡控制单元、泄漏电流判断功能。对特高压直流工程现场调试和系统运行时的保护配置选择具有实际指导意义。
As the function of ± 800 kV Yun-Guang UHVDC control system is relatively complex, the control aspects of each set are much different from the traditional HVDC transmission projects. The setting of each control section of the control system is introduced and analyzed, such as the controller selection function, Current control coordination between stations, current margin compensation, current error control, low voltage limiting and transient fault recovery; special control settings, such as voltage balance control unit, leakage current judgment function. It is practical and instructive to choose the protection configuration of UHV DC project on site and during system operation.