摘要
为增强多变流器互联交直流微网集群系统运行稳定性、可靠性及控制灵活性,本文提出一种一致性功率协同控制策略。控制系统包含互联变流器(DC-DC、DC-AC)柔性控制和交、直流微电网下垂控制等。互联DC-AC和DC-DC均采用双环控制,外环将一致性耦合控制和功率分配环节相结合,内环分别采用虚拟同步控制和移相控制。本文所提控制方法,系统仅基于就地量测频率或直流电压等信息,可同时实现子系统间功率协同互济、多互联变流器功率分配及多运行模式自适应平滑切换等目标。最后通过PSCAD/EMTDC仿真模型对所提方法的有效性进行了验证。
To enhance the operation stability,reliability,and control flexibility of an AC/DC microgrid cluster system with multiple interconnected converters,a consensus-based power coordinated control strategy is proposed in this paper.The control system includes the flexible control of interconnected DC-DC and DC-AC converters,as well as the droop control of AC and DC microgrids.Both the interconnected DC-AC and DC-DC converters adopt dual-loop control,in which the outer loop combines consensus-based coupling control and power sharing,while the inner loop adopts virtual synchronous generator control and phase shift control,respectively.By using the proposed control method,the goals of power coordination and mutual support among subsystems,power sharing between multiple interconnected converters,and adaptive smooth transition between among operating modes can be achieved simultaneously on the basis of only locally measuring the frequency or DC voltage information.Finally,the effectiveness of the proposed method is verified by a simulation model established in PSCAD/EMTDC.
作者
杨天国
何鹏
张浩
周倩
石侃
丁元元
YANG Tianguo;HE Peng;ZHANG Hao;ZHOU Qian;SHI Kan;DING Yuanyuan(Dehong Power Supply Bureau,Yunnan Power Grid Co.,Ltd,Dehong 678400,China;Electric Power Research Institute,Yunnan Power Grid Co.,Ltd,Kunming 650214,China;Ruili Power Supply Bureau,Yunnan Power Grid Co.,Ltd,Ruili 678600,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2024年第4期120-132,共13页
Proceedings of the CSU-EPSA
基金
云南电网有限责任公司科技项目(面向边境电力互联的变电站分布式光储资源规划与边端控制研究,YNKJXM20220134)。
关键词
交直流微网集群
协同控制
互联变流器
就地量测
功率分配
平滑切换
AC/DC microgrid cluster
coordinated control
interconnected converter
local measurement
power sharing
smooth transition
作者简介
杨天国(1984—),男,本科,高级技师,研究方向为电网调度自动化、新型电力系统。Email:ytianguo@163.com;何鹏(1983—),男,本科,高级工程师,研究方向为电力系统及其自动化。Email:19252074@qq.com;张浩(1991—),男,博士,工程师,研究方向为综合能源系统优化控制、电力人工智能。Email:zhanghaoncepu@163.com。
