Multi-Target Virtual Resistance Control Strategy in a 400 Hz Low Voltage Microgrid

This paper has proposed a multi-target virtual resistance strategy which can effectively realize targets of unbalanced voltage compensation and unbalanced current (power) sharing among inverters in 400 Hz low voltage microgrid. For unbalanced voltage compensation function, the strategy employs virtual resistance based on unbalanced voltage degree to compensate unbalanced voltage. For unbalanced current sharing function, the strategy uses current sharing degree and virtual resistance to share unbalanced current among inverters in parallel system. The experimental results of two inverters in parallel system are shown to prove the validity of proposed strategy. In addition, this strategy reduces large calculation and is easy to implement.