特高压交流输电线路地线绝缘间隙电压的研究

Research on Voltages Across Both Terminals of Ground Wire Insulation Gap for UHVAC Transmission Line

地线绝缘是为降低地线损耗而普遍采用的技术,该技术可保障特高压线路工况下处于绝缘状态、故障下处于击穿状态从而形成短路电流的泄放通道。将地线运行模型转换成电路计算模型,通过求解电网络方程,计算工况及故障情况下地线绝缘间隙两端的电压,为工程建设中确定地线绝缘间隙的大小提供技术支持。

The widely used ground wire insulataion is such a technology to reduce the power loss in ground wires.This technology can ensure that the ground wires are insulated to reduce the power loss under nomal operation conditions,and broken-down to provide a channel for short-circuit current and lightning current under fault conditions.Turning the operation model of ground wire into circuit calculation model and by means of solving electric network equations,the voltages across both terminals of ground wire insulation gap under normal operation conditions and fault conditions can be calculated to provide technical support for determining the sizes of ground wire gaps in engineering construction.