摘要
The conventional droop control technology, which can achieve autonomous power sharing among the distributed generation units, suffers from inaccurate reactive power sharing due to its dependence on line impedances. In this article, a novel consensus-based cooperative droop control technique where the droop slope gain is adaptively adjusted is proposed to improve the reactive power-sharing accuracy with the help of a sparse communication network. Through detailed small-signal analysis, it is verified that the proposed droop technique presents excellent immunity against communication delay. Laboratory test results are presented and the performances of the proposed control technique under different operation scenarios are verified, including the load change, communication link failure, and plug-And-play operation.