The Action Analysis of Losing Voltage in Adjacent Substations Caused by Mistaken Bus Grounding

Power system fault has brought great disturbance to the stable operation of power system. The in-depth search and analysis of fault causes is the basic requirement to improve the reliability of power system. With an example of relay protection action of a power plant due to the electrification of the operator is mismatched with the busbar grounding switch. In this paper, the protection device and automatic bus transfer equipment action in this action case are analyzed from the logic judgment of the protection action and the calculation of the fault information, and the reasons for the loss of pressure in the substation are discussed. It provides reference methods for analysis and treatment of similar accidents to ensuring safe and reliable operation of power grid.