配电网分布式储能孤岛供电控制策略  

Control Strategy of Distributed Energy Storage in Island Distribution Network

作　　者：李佳骥[1] 于宝鑫 张华东[1] 李文龙[1] 薛宇石 褚铁柱 毕然 LI Jiaji;YU Baoxin;ZHANG Huadong;LI Wenlong;XUE Yushi;CHU Tiezhu;BI Ran(Chengde Electric Power Supply Company, State Grid Jibei Electric Power Co. , Ltd. , Chengde 067000, Hebei Province, China;State Key Laboratory of Operation and Control of Renewable Energy ＆ Storage Systems, China Electric Power Research Institute, Beijing 100192, China)

机构地区：[1]国网冀北电力有限公司承德供电公司,河北省承德市067000 [2]新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市100192

出　　处：《电力建设》2018年第4期83-91,共9页Electric Power Construction

基　　金：国家自然科学基金项目(51777197)~~

摘　　要：以利用储能系统提高电网可靠性为目的,文章研究了分布式储能实现配电网孤岛运行的控制策略。首先提出了基于虚拟电阻的LC滤波型储能变流器(power converter system,PCS)恒压恒频控制策略,之后在传统下垂控制策略的基础上增加了虚拟电感,可以在配电网电阻较大时实现有功功率和无功功率的解耦控制,并给出了求取虚拟电感合理取值的方法。然后通过引入荷电状态(state of charge,SOC)反馈动态调整下垂控制中的有功控制参数,实现了有功功率在不同储能之间的合理分配。最后在Simulink仿真平台搭建了IEEE 14节点配电网,接入了4台分布式储能设备实现配电网的孤岛运行,仿真结果验证了所提控制策略的有效性,可以实现配电网的孤岛运行。To improve the reliability of the power grid with energy storage systems,this paper studies the control strategy of distributed energy storage to realize island mode of distribution network. Firstly,the constant voltage and frequency control strategy of LC filter power converter system（ PCS） based on virtual resistor is proposed. Secondly,the droop control strategy based on the addition of virtual inductance is proposed,the decoupling control of active and reactive power when resistance is large in the distribution network can be achieved. And the method to obtain a reasonable value of the virtual inductance is given. Then,the state of charge（ SOC） feedback is introduced which can dynamically adjust the active control parameters in droop control,the rational distribution of active energy among different energy storage is realized.Finally,an IEEE 14 node distribution network is set up in Simulink platform,and 4 distributed energy storage devices are connected to realize the island mode of the distribution network. The simulation results verify the effectiveness of the control strategy,which can realize the island operation in the distribution network.

关 键 词：分布式储能 配电网 孤岛运行 下垂控制 

分 类 号：TM61[电气工程—电力系统及自动化]