Proportional Current Sharing Based on Periodic Dynamic Event-driven H_(∞) Consensus in DC Microgrids with Power Coupling  

作　　者：Rui Wang Qiuye Sun Lei Liu Li Zhang Peng Wang Huaguang Zhang 

机构地区：[1]College of Information Science and Engineering,Northeastern University,Liaoning 110819,China [2]College of Science,Liaoning University of Technology,Liaoning 121001,China [3]School of Electrical and Electronic Engineering,Nanyang Technological University,639798,Singapore

出　　处：《CSEE Journal of Power and Energy Systems》2022年第6期1558-1568,共11页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by National Key Research and Development Program of China(2018YFA0702200);National Natural Science Foundation of China(62073065).

摘　　要：Although the proportional current sharing has been widely studied,the heterogeneous characteristic of the different interfaced converters and power coupling terms among distributed generators(DGs)are rarely considered.Therefore,this paper proposes a secondary H_(∞)consensus method with a periodic dynamic event-driven scheme for dc microgrids with power coupling to accomplish the precise proportional current-sharing.It is useful for reducing carbon.First,a generalized converter is constructed through equivalent transformation between rectifier and boost converter.Moreover,the heterogeneous characteristic of the interfaced converters regarding different DGs,such as wind and solar generators,is embedded into controller design.Furthermore,the standard linear heterogeneous multi-agent system with power coupling term is built.On this basis,the problem of proportional current sharing is modified into the output consistency problem of multi-agent systems.Furthermore,the H_(∞)consensus approach is proposed to accomplish the precise proportional current sharing.Meanwhile,to shorten communication bandwidth,the periodic dynamic event-driven communication strategy is designed.Compared with traditional event-driven communication schemes,a lower communication frequency has been obtained through the proposed communication scheme.In addition,this communication scheme not only avoids Zeno-behavior,but also acquires the smallest sampling time interval.Finally,effectiveness of the proposed approach is verified by two test systems.

关 键 词：Current sharing event-driven communication H_(∞)consensus approach heterogeneous distributed generators 

分 类 号：TM732[电气工程—电力系统及自动化]