A novel islanding detection based on adaptive active current disturbance

作者：Ding Hao^*; Wei Yanjun; Qi Hanhong; He Yu; Guo Xiaoqiang

来源：Transactions of China Electrotechnical Society, 2014, 29(8): 294-300.

• Active current
• Adaptive
• Islanding detection
• Non detection zones
• PV grid-connected inverters

For islanding detection of the three-phase PV grid-connected inverter, the constant and periodic active current disturbance methods are briefly analyzed, and the islanding detection method based on adaptive active current disturbance is proposed for overcoming the insufficiencies of the two methods. According to the amplitude of the voltage at the point of common coupling(PCC) detected after islanding occurred, the resistance value of the load can be obtained. Then the relationship between the minimum active disturbance current which can trigger islanding protection and the amplitude of PCC voltage is deduced. The required active disturbance current can be adaptively added to the inverter according to the amplitude of PCC voltage. As a result, the island can be detected after power failure without non-detection zone. According to IEEE Std. 1547.1 and IEEE Std. 929-2000, the simulation results show that the proposed algorithm is correct and effective. The experiment results also show that the disturbance on the inverter's output current is more significantly reduced by using the proposed adaptive active current disturbance algorithm, compared to any of constant and periodic disturbance methods.

• 出版日期2014