【摘要】 建立了谐振接地系统单相接地故障分量复合模网,得出了接地故障时暂态电容电流和暂态电感电流的数学表达式,并根据计算结果分析了故障初相角、故障时刻及过渡电阻对暂态电流特性的影响。经与单独使用零序网络进行比较,采用复合模网分析暂态电流更加准确全面,计算结果具有更高的精度和适用性,为谐振接地系统故障选线研究提供了有益的参考。更多还原

【Abstract】 The composite modal network was established for single-phase grounding fault in a resonant earthed system and mathematical expressions of transient current in the capacitor and inductor were obtained.According to calculation results,this paper analyzed impacts of fault initial phase angle,fault time and transition resistance on the characteristics of transient current.Compared with using zero sequence networks alone,adopting composite modal network to analyze transient current is more correct and complete.The calculation result is with higher accuracy and applicability,providing useful reference for the study of fault line detection in the resonant earthed system.更多还原