蜂巢状有源配电网中多端口能量枢纽控制策略  

Control strategy of multi-port energy hub in honeycomb active distribution network

作　　者：蒋玮[1] 余斌[1] 郁家麟 孙可 屠晓栋 钱伟杰 JIANG Wei;YU Bin;YU Jialin;SUN Ke;TU Xiaodong;QIAN Weijie(School of Electrical Engineering,Southeast University,Nanjing 210096,China;State Grid Zhejiang Electric Power Co.,Ltd.Jiaxing Power Supply Company,Jiaxing 314000,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]东南大学电气工程学院,江苏南京210096 [2]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314000 [3]国网浙江省电力有限公司,浙江杭州310007

出　　处：《电力工程技术》2023年第5期70-79,共10页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(52277172)。

摘　　要：作为一种适应高比例分布式新能源接入的新型配电网架构,蜂巢状有源配电网利用多端口能量枢纽(multi-port energy hub,MEH)可实现多微电网/配网单元间功率的互联互济,如MEH中包含储能设备,可以进一步提升新能源利用率和电网可靠性。文中提出一种含储能的MEH及其分层协调控制策略。上层控制根据储能系统的荷电状态和配电网运行状态协调控制储能变流器与各并网端口变流器之间的功率分配,使得MEH在平抑新能源波动、配网故障恢复等运行模式下均能够对内部储能系统进行能量管理。下层控制通过将储能变流器有功功率的微分值反馈至储能系统控制环路进行补偿,提高储能变流器输入/输出有功功率响应速度。文中设计了MEH控制系统关键参数,利用MATLAB/Simulink对MEH在配电系统中的应用进行仿真。不同工况下的仿真对比验证了所提分层协调控制策略的有效性,证明该策略能够延长储能系统工作时间,提高储能系统有功功率变化率,减小直流母线的电压波动。As a new distribution network structure,the honeycomb active distribution network uses the multi-port energy hub(MEH)to realize the interconnection of multiple microgrids/distribution network units.The MEH equipped with energy storage can improve the efficiency of renewable energy and flexibility of the system.In this paper,a MEH with energy storage and the corresponding hierarchical coordination control strategy are proposed.The upper-layer control coordinates the power distribution among the energy storage and grid-connected ports converters with considering the state of charge(SOC)of the energy storage and the operation states of the distribution system.Therefore,the energy management within the MEH can be realized in renewable energy fluctuations suppression and distribution network fault recovery modes.The lower layer control utilize the differential value of the output active power to compensation the control loop of the energy storage system for accelerating its response speed.The MEH system and its parameters are further designed.Finally,MATLAB/Simulink is used to simulate the application of the MEH in the distribution network.The effectiveness of the proposed hierarchical coordinated control strategy can be verified by the comparison of simulation results under different working conditions.By using this strategy,the working time of the energy storage system can be extended and the active power change rate of the energy storage system can be increased.Also,the voltage fluctuation of the DC bus can be reduced.

关 键 词：多端口能量枢纽(MEH) 蜂巢状有源配电网 储能变流器 分层协调控制 变下垂系数控制 暂态功率波动 

分 类 号：TM464[电气工程—电器]