基于综合选线策略的小电流接地选线装置

For the deficiency of single line selection principle, therefore, in this study, for steady-state fault, neutral ungrounded power system using zero sequence admittance method, neutral in tuning arc suppression coil power system using zero sequence susceptance increment method, and neutral in pre-tuning arc suppression coil power system using zero sequence conductance method, and for transient-state fault using mutual integral of transient current, a microcomputer fault line device for single phase earthed fault of non-effective earthed power system is developed based on the above methods. This computer selecting device is effective for high impedance ground fault and arcing ground fault.