基于下垂移相的三端口直流能量路由器功率协调控制策略  

A Coordinated Power Control Strategy of Three-port DC Energy Router Based on Droop Phase-shift

作　　者：涂春鸣[1] 栾思平 肖凡[1] 兰征 TU Chunming;LUAN Siping;XIAO Fan;LAN Zheng(National Electric Power Conversion Control Engineering Technology Research Center(Hunan University),Changsha 410082,Hunan Province,China;Department of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan Province,China)

机构地区：[1]国家电能变换与控制工程技术研究中心(湖南大学),湖南省长沙市410082 [2]湖南工业大学电气与信息工程学院,湖南省株洲市412007

出　　处：《电网技术》2019年第11期4105-4114,共10页Power System Technology

基　　金：国家自然科学基金项目(51577055)~~

摘　　要：针对应用于多个直流微网间互联的三端口直流能量路由器,分析了三端口直流微网的运行状态和能量路由器各端口的工作模式。在此基础上,分析了单母线直流微网传统下垂控制存在的问题和局限性;为此提出基于标幺化下垂移相的三端口直流能量路由器功率协调控制策略,实现能量在多个直流微网间的合理分配和减小各直流微网中的母线电压偏差;通过将单母线直流微网的电压-有功功率下垂特性标幺化,从而得到不同电压等级直流子微网间需交换的能量,无需切换三端口直流能量路由器端口工作模式便可确保各直流子微网在正常、不正常和功率故障状态下的功率支撑。仿真结果验证了所提下垂移相功率协调控制策略的正确性和可行性。For the three-port DC energy router applied to the interconnected system with multiple DC microgrids, the operating state of the three-port DC microgrids and the working mode of each port of the energy router were analyzed. On this basis, the problems and limitations of conventional droop control of single-bus DC microgrids were analyzed. Therefore, a coordinated power control strategy based on normalized droop phase-shifted control is proposed for three-port DC energy router to effectively realize rational energy allocation among multiple DC microgrids and reduce bus voltage deviation in each DC microgrid. The required power exchange between the DC sub-grids with different voltage levels can be obtained by standardizing the voltage-active power droop characteristics of the single-bus DC microgrids. In addition, there is no need to switch port working mode of the three-port DC energy router to ensure the power support of each DC sub-microgrid under normal, abnormal and power failure conditions. Correctness and feasibility of the proposed coordinated droop phase-shift control method are verified by simulation results.

关 键 词：直流微网 三端口能量路由器:下垂移相 功率协调控制 

分 类 号：TM721[电气工程—电力系统及自动化]