基于背靠背变流器柔性互联的微网群分层协同恢复控制策略  

Hierarchical Cooperative Recovery Control Strategy for Flexible Interconnected Microgrid Cluster Based on Back-to-back Converters

作　　者：孟潇潇 邵冰冰 韩平平[1] 华玉婷 王强钢[3] MENG Xiaoxiao;SHAO Bingbing;HAN Pingping;HUA Yuting;WANG Qianggang(Anhui Province Key Laboratory of Renewable Energy Utilization and Energy Saving(Hefei University of Technology),Hefei 230009,Anhui Province,China;Energy Laboratory of Anhui Province(Hefei Comprehensive National Science Center),Hefei 230031,Anhui Province,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Shapingba District,Chongqing 400044,China)

机构地区：[1]新能源利用与节能安徽省重点实验室(合肥工业大学),安徽省合肥市230009 [2]安徽省能源实验室(合肥综合性国家科学中心能源研究院),安徽省合肥市230031 [3]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2023年第20期7812-7826,共15页Proceedings of the CSEE

基　　金：安徽省自然科学基金项目(2108085QE236);中央高校基本科研业务费专项资金项目(JZ2021HGQA0196,PA2022GDSK0072)。

摘　　要：柔性多状态开关丰富了微网群拓扑构型的多样性,提升了其调控手段和故障恢复能力。但柔性互联方式改变了传统交流微网群的扰动传递模式,导致各微网单元间频率/电压解耦,从而给扰动下的频率/电压无差恢复及有功均分控制带来了新的难题。该文以背靠背变流器柔性互联微网群为研究对象,设计全新的集中–分布式混合的分层协同控制通信网络架构,分别基于一致性理论和功率平衡方程组推导并提出柔性互联微网群的分层协调控制策略。在该策略下,能够实现集群全网的频率/电压无差恢复和有功出力按容量比率均分的控制目标。该文分析该控制策略下柔性互联微网群的稳定性,在Matlab/Simulink中搭建仿真模型,验证控制策略的有效性。The flexible multi-state switch(FMSS)enriches the diversity of the topology configuration of microgrid cluster(MGC)and improves its control measure and fault recovery ability.However,flexible interconnection changes the disturbance transfer mode of the traditional AC-MGC,leading to frequency/voltage decoupling among the MG units,which brings new difficulties to the frequency/voltage zero-error recovery and active power sharing control under the disturbance.This study firstly takes BTBC-FMSS based flexible interconnected MGC system as the research object.Then,a novel centralized-distributed hybrid communication architecture is designed,and a hierarchical cooperative control for the MGC system is proposed based on consistency theory and power balance equations.Under this control strategy,the frequency/voltage restoration and active power sharing control goals can be achieved.Finally,the stability analysis of the proposed control strategy is analyzed,and a simulation model is built in Matlab/Simulink to verify the effectiveness of the control strategy.

关 键 词：微网群 柔性多状态开关 分层协同控制 背靠背变流器 

分 类 号：TM73[电气工程—电力系统及自动化]