Research on Multi-terminal Differential Protection Method Based on Active Component of Positive Sequence Current
The access of distributed power source makes the bidirectional flow of power flow and the change of short-circuit cur-rent complicated,and the traditional three-stage current protection is difficult to apply.In order to solve the problem of data syn-chronization in the scenario of multi-terminal load access of distributed power supply,a multi-terminal differential protection method based on the active component of positive sequence current was proposed.The differential protection criterion is formed to realize the multi-terminal differential protection method by taking advantage of the fact that the active component of positive sequence current is a direct flow,which is basically not affected by the time error.Simulation results show that the proposed method can effectively identify faults in the region and has a certain ability to resist transition resistance.
positive sequence currentactive componentactive distribution networkmulti-end differential
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