摘要
自主控制与集中控制是两种典型的微电网控制方式,自主控制适合分布式发电装置(distributed generator,DG)“即插即拔”的灵活特性,但却难以保证高变化率源荷下的电压质量。提出一种由底层控制与上层控制组成的二级协同控制方法。底层由具有即插即拔特性的分布式新能源发电装置自主控制实现;上层采用集中控制,由微电网中央控制器(microgrid center controller,MGCC)协同子网与上层管理的子网级储能装置(energy storage system,ESS)调控网内电压。给出了该控制方法下子网级ESS的控制方法,并通过Matlab/Simulink仿真验证了方法的有效性。
Centralized and decentralized control are two conventional control methods for micro-grid,while decentralized control is more adoptable for the“plug-in and plug-out”characteristic of distributed generators(DG)in micro-grid.However,high load and generation various ratio lead by increasing renewable energy causes challenges for decentralized control and it’s hard to ensure the power quality of micro-grid.Aiming to the demand of distributed renewable generation with high load/generation various ratio,a two-level cooperation control scheme contains primary level and secondary level is proposed in this paper.The primary level is realized by decentralized control of DGs with“plug-in and plug-out”characteristic,while secondary level adopt centralized control,micro-grid central controller(MGCC)cooperates sub-micro-grid and secondary-level energy storage system(ESS)and regulate the power quality inside micro-grid.In this paper,the control method of subnet-level ESS for energy storage system has also been proposed,and performance of the method was validated by MATLAB/Simulink simulation.
作者
董庆九
徐志爱
毕跃林
DONG Qingjiu;XU Zhiai;BI Yuelin(Yunnan Power Grid Co.,Ltd.,Dali Power Supply Bureau,Dali 671000,China)
出处
《供用电》
2020年第4期78-85,共8页
Distribution & Utilization
基金
云南电网有限责任公司科技项目(050500KK52180005)。
关键词
微电网
分布式发电
高源荷变化率
协同控制
储能装置
micro-grid
distributed generation
high power and load change rate
cooperation control
energy storage system
