Hybrid Local-global Power-sharing Scheme for Droop-free Controlled Microgrids  

作　　者：Kunyu Zuo Lei Wu 

机构地区：[1]Electrical and Computer Engineering Department,Stevens Institute of Technology,Hoboken,NJ 07030,USA

出　　处：《Journal of Modern Power Systems and Clean Energy》2024年第5期1520-1534,共15页现代电力系统与清洁能源学报（英文）

基　　金：supported in part by the PSEG Foundation gift。

摘　　要：The droop-free control adopted in microgrids has been designed to cope with global power-sharing goals,i.e.,sharing disturbance mitigation among all controllable assets to even their burden.However,limited by neighboring communication,the time-consuming peer-to-peer coordination of the droopfree control slows down the nodal convergence to global consensus,reducing the power-sharing efficiency as the number of nodes increases.To this end,this paper first proposes a local power-sharing droop-free control scheme to contain disturbances within nearby nodes,in order to reduce the number of nodes involved in the coordination and accelerate the convergence speed.A hybrid local-global power-sharing scheme is then put forward to leverage the merits of both schemes,which also enables the autonomous switching between local and global power-sharing modes according to the system states.Systematic guidance for key control parameter designs is derived via the optimal control methods,by optimizing the power-sharing distributions at the steady-state consensus as well as along the dynamic trajectory to consensus.The system stability of the hybrid scheme is proved by the eigenvalue analysis and Lyapunov direct method.Moreover,simulation results validate that the proposed hybrid local-global power-sharing scheme performs stably against disturbances and achieves the expected control performance in local and global power-sharing modes as well as mode transitions.Moreover,compared with the classical global power-sharing scheme,the proposed scheme presents promising benefits in convergence speed and scalability.

关 键 词：Droop-free control POWER-SHARING optimal control Lyapunov stability 

分 类 号：TM727[电气工程—电力系统及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]