Mitigation of Unbalance Voltages for Islanded Micro-Grids by using Five Level Diode Clamped Multilevel Inverter
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Abstract
— In this paper, a control strategy for paralleled three-phase inverters is proposed. The proposed local controller includes
inner loop controller and droop controller and virtual impedance and unbalance compensator. The voltage/current controllers are to better
mitigate voltage distortion when supplying non linear loads. Linear and non liner loads are to accurate current sharing for droop controller
and virtual impedance. According to the amplitude of the negative sequence voltage by adjusting voltage reference. Compensation signal is
sent to the DGs local controller, unbalance factor is reduced significantly. Unbalance is caused by single phase generators. It can be mitigated
to an extremely low. In order to proposed control strategy for ac micro-grid consist of three three phase three leg inverters
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