混合式气体绝缘开关感应环流的计算方法探讨

摘要

指出混合式气体绝缘开关设备通流能力强而且要求外壳多点接地，在运行中外壳及其下方的接地网中会感应出相当大的环流。这些感应环流的数值大小是正确选择外壳接地线及地网导体截面的依据。提出了一种算法，利用电磁感应原理和电路的网孔定理来求解混合式气体绝缘开关设备周围的导体感应环流，并给出了一个实际的计算实例。%Because of HGIS' large load capacity and the requirement for its enclosure to be grounded at many points, during operation,great circulation current will be induced through the enclosure and the grounding grid. Magnitude of the circulation current is the basis for correctly choosing the cross section of the relative grounding conductors. Based on the principle of electromagnetic induction and the law of circuit loop,this paper presents an algorism to figure out the circulation current,and gives an example for a real HGIS. The presented algorism is easy to be understood and to be programmed in personal computers.