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A Simplified Control Method for the Grid-Connected Inverter With the Function of Islanding Detection

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3 Author(s)
Hurng-Liahng Jou ; Dept. of Electr. Eng., Nat. Kaohsiung Univ. of Appl. Sci., Kaohsiung ; Wen-Jung Chiang ; Jinn-Chang Wu

In this paper, a novel method for the voltage-controlled grid-connected inverter with the function of islanding detection is proposed for the distribution power generation system. The salient features of the proposed voltage-controlled grid-connected inverter are simple control circuit and fast transient response. Besides, an islanding detection method is proposed and incorporated into the controller of a voltage-controlled grid-connected inverter. The proposed islanding detection method will cause variation in amplitude and frequency of the load voltage when the utility is interrupted so as to immediately detect the islanding operation. A prototype is developed and tested to demonstrate the performance of the proposed voltage-controlled grid-connected inverter. The experimental results show that the performance of the proposed voltage-controlled grid-connected inverter is as expected.

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Power Electronics, IEEE Transactions on  (Volume:23 ,  Issue: 6 )