Active islanding detection method for inverter-based distribution generation power system

作者：Chiang Wen Jung; Jou Hurng Liahng^*; Wu Jinn Chang

来源：International Journal of Electrical Power & Energy Systems, 2012, 42(1): 158-166.

DOI：10.1016/j.ijepes.2012.03.038

• Islanding
• Distributed generation power system
• Grid-connected DC/AC inverter

A novel islanding detection method for an inverter-based distribution generation power system is proposed in this paper. The inverter-based distribution generation power system includes a dc power source and a grid-connected DC/AC inverter. The grid-connected DC/AC inverter acts as a virtual capacitor as the frequency is slightly lower than the fundamental frequency of utility voltage. Since only the inverter-based distribution generation power system supplies power to the load as the utility power interruption occurs, the virtual capacitor operation of the inverter-based distribution generation power system will result in the change of load voltage in amplitude or frequency. Hence, the proposed method can immediately detect the islanding operation.

• 出版日期2012-11