750kV GIS中隔离开关取消合分闸电阻可行性研究  

Study on the Feasibility of Removing the Opening and Closing Resistor of Disconnecting Switch in 750 kV GIS

作　　者：魏磊 郭洁[2] 贾宏刚 马欢[2] 陈舒[2] 乔兵兵[2] 

机构地区：[1]国网陕西省电力公司经济技术研究院,西安710065 [2]西安交通大学电气工程学院,西安710049

出　　处：《高压电器》2016年第5期136-140,147,共6页High Voltage Apparatus

摘　　要：文中以西安南750 kV GIS电站为工程背景,研究取消750 kV GIS中隔离开关分合闸电阻的可行性。依据西安南750 kV GIS结构和电气接线选取了7种典型的运行方式,建立了ATP-EMTP仿真计算模型,分别对不同方式下隔离开关进行分合闸操作,研究分析各设备节点的电压幅值。对幅值较高的电压波形进行幅频分析,对过电压及VFTO进行绝缘配合校验。计算结果表明:取消隔离开关分合闸电阻后,不同接线方式下操作隔离开关时,进线套管、与被操作隔离开关相邻的断路器、与之连接在同一母线上且与之相邻的隔离开关上的过电压幅值较高,但均未超过设备的雷电耐受电压。因此可以得出结论:从绝缘配合的角度,750 kV GIS中隔离开关分合闸电阻可以取消。With Xi＇annan 750 kV GIS as the project background, the feasibility of removing the opening and closing resistor of disconnecting switch is studied. Seven modes of connection have been chosen and seven ATP-EMTP models have been built to operate every disconnecting switch in the models and the voltage of important nodes is recorded, what＇s more, the frequency amplitude domain analysis against those voltage wave shapes with high amplitude is made to make sure whether it is VFTO and then it is checked by the lightning impulse withstand voltage. The results show that after removing the opening and closing resistor, when the disconnecting switches are operated, the voltage on the income casing, the circuit breaker borderupon the operated disconnecting switch, and the disconnecting switch border upon the operated disconnecting switch and connected on the same bus with it are relatively high, but they are also under the lightning impulse withstand voltage of the equipment. So a conclusion could be drawn that from the point of insulation coordination, the opening and closing resistor of disconnecting switch in 750 kV GIS could be removed.

关 键 词：GIS 隔离开关 分合闸电阻 VFTO 幅频 

分 类 号：TM564.1[电气工程—电器]