Title :
An Improved Islanding Detection Method for a Grid-Connected Inverter With Intermittent Bilateral Reactive Power Variation
Author :
Zhang, Jun ; Xu, Dehong ; Shen, Guoqiao ; Zhu, Ye ; He, Ning ; Ma, Jie
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
An islanding detection method for a grid-connected inverter incorporating intermittent bilateral (IB) reactive power variation (RPV) is described. The inverter output with IB reactive power enables the detection of an islanding. The RPV range is derived in order to eliminate the nondetection zone. The design scheme of variation time in the method is obtained by estimating the transient response due to islanding occurrence. In addition, the effect of the proposed detection strategy on power quality is investigated. The proposed islanding detection method has been experimentally verified on a three-phase grid-connected 6-kW inverter.
Keywords :
distributed power generation; invertors; power supply quality; reactive power; transient response; IB RPV; design scheme; detection strategy; improved islanding detection method; intermittent bilateral reactive power variation; inverter output; nondetection zone elimination; power 6 kW; power quality; three-phase grid-connected inverter; transient response estimation; Distributed power generation; Generators; Inverters; Monitoring; Phase locked loops; Reactive power; Transient analysis; Distributed power generation; grid-connected inverter; intermittent bilateral reactive power variation (IB-RPV); islanding detection method; nondetection zone (NDZ);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2012.2196713
