Principle of High Impedance Busbar Differential Relay Protection and Application for MV Busbar
This article introduces the principle of high-impedance busbar differential protection,and the working principle of high-impedance busbar differential protection under three different working conditions:faults out-side the busbar protection zone,faults inside the busbar protection zone,and differential currents caused by cur-rent transformer saturation.Taking the 33kV busbar protection being implemented in a foreign project as an example,the actual derivation and calculation of current transformer parameter,stabilizing resistor selection,protection setting value calculation,etc.are carried out,and final selection parameters and setting value list are given.
High impedanceDifferential relay protectionMV busbar
万方数据
维普
