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Voltage Shift Acceleration Control for Anti-Islanding of Distributed Generation Inverters

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4 Author(s)
Seul-Ki Kim ; Electrotechnol. Res. Inst., Changwon, South Korea ; Jin-Hong Jeon ; Heung-Kwan Choi ; Jong-Yul Kim

This paper proposes voltage-shift acceleration control for islanding detection of distributed-generation (DG) inverters. The proposed method is conceptually based on a traditional dq -based voltage positive feedback control. A main improvement of the proposed control is that the anti-islanding performance and its impact on inverter output control can be consistent regardless of inverter operation points. An analytical approach based on a small-signal model of an inverter controller is used to prove the proposed control. Also, an analytical design method is proposed to obtain proper control gain that satisfies two conflicting issues: successful anti-islanding and limited impact on inverter control. Simulation and experimental tests were conducted to validate the proposed detection algorithm and its design method. In addition, simulation results on a two DGs system are shown to investigate the performance in multiple DGs operation.

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Power Delivery, IEEE Transactions on  (Volume:26 ,  Issue: 4 )