事件触发改进一致性算法的孤岛混合微电网并联互联变流器分布式协调控制策略  

Distributed Coordinated Control Strategy for Parallel Bidirectional Power Converters of Island Hybrid Microgrid Based on Event Triggered Improved Consensus Algorithm

作　　者：赵洪山[1] 徐昆毓 ZHAO Hongshan;XU Kunyu(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,Hebei Province,)

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《电网技术》2024年第7期2977-2984,I0097,共9页Power System Technology

摘　　要：在交直流混合微电网中,并联互联变流器(parallel bidirectional power converters,BPCs)可以实现大容量的功率传输,以满足新型电力系统在空间上的供需匹配。如何在占用更少资源的同时协调控制BPCs实现功率的比例共享,是交直流混合微电网中BPCs控制的研究难点。因此,该文设计了一种针对BPCs的事件触发改进一致性协调控制策略。以归一化下垂控制为基础,提出了改进的比例功率一致性算法,实现BPCs间高精度比例功率共享。在此之上,基于BPCs比例功率误差建立事件触发改进一致性算法,并预设触发函数的预判阈值,从而降低系统在稳定状态下的通信次数。最后进行仿真对比分析,结果表明该文提出的方法相比基本一致性算法通信量减少98.35%;同时,与现有控制策略相比,该文提出的方法有着更好的控制性能。In the AC/DC hybrid microgrid,parallel bidirectional power converters(BPCs)can realize large-capacity power transmission to meet the new power system's spatial supply and demand matching.Coordinating and controlling BPCs to realize power proportion sharing while occupying fewer resources is the research difficulty of BPCs control in AC/DC hybrid microgrids.Therefore,this paper designs an event triggering improved consistency coordination control strategy for BPCs.Based on the normalized droop control,an improved proportional power consensus algorithm is proposed to realize high-precision proportional power sharing among BPCs.On this basis,an event trigger improved consensus algorithm is established based on the BPCs proportional power error,and a pre-judgment threshold of the trigger function is preset,thereby reducing the number of system communications in a stable state.The simulation results show that the traffic volume of the proposed method is reduced by more than 98%compared with the basic consensus algorithm;Meanwhile,the proposed method has better control performance compared with the existing literature.

关 键 词：孤岛交混合微电网 并联互联变流器 改进一致性算法 事件触发 李雅普诺夫函数 

分 类 号：TM721[电气工程—电力系统及自动化]