Abstract
The load side failure of an independent microgrid will lead to an imbalance in power supply and demand and voltage drop in the fault area. The use of traditional reactive power compensation to achieve fault traversal in microgrids cannot effectively solve. This article proposes a differential power flow compensation control strategy based on micro source feeder impedance. Utilize micro source redundant power to increase active power output and compensate for the required power flow in the fault area. Calculate the power flow compensation coefficient based on the difference in feeder impedance, and dynamically adjust the reference value of power flow compensation according to the required power in the fault area. By rationalizing the distribution of fault flow, the transient power balance and voltage support in the fault area can be improved. To a certain extent, it enhances the fault resilience of the independent microgrid, and improves the working reliability during fault traversal. At the same time, it reduces the sharp increase in line losses caused by fault currents, and even endangers the security of network structures. The effectiveness of the strategy was verified through simulation and experiments.
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