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This paper proposes a novel control method to realize unbalanced load power sharing in an islanded microgrid. The proposed method consists of typical real-power-frequency (P-f) and reactive-power-voltage (Q-V) droop control, virtual impedance control which only functions at fundamental negative sequence, and unbalanced-power-small-signal-frequency (SU-ωss) droop control. The typical droop control...
The well-known active power-frequency and reactive power-voltage amplitude droop control is widely used in the coordinative control of parallel inverters in microgrids. However, this conventional droop method may cause frequency and voltage deviation, which affects the accuracy of power supply. This paper proposes a novel secondary control strategy to compensate this deviation. This strategy mimics...
In order to improve power reliability of critical load, distributed generation (DG) should be with intentional islanding operation when utility is outage. This paper proposes a novel control strategy for three phase inverter in DG to realize transferring between grid-tied and islanding modes, which is with an inner inductor current loop and outer capacitor voltage loop in the synchronous rotating...
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