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孤岛运行下垂逆变器二次调频方法
董家伟1, 王志新1, 朱国忠2, 包俊3
1.上海交通大学 电气工程系,上海 200240;2.上海正泰电源系统有限公司,上海 200210;3.上海禧龙科技股份有限公司,上海 201517
摘要:
为消除下垂控制引起的微电网频率静差,提出一种基于积分超前补偿环节的孤岛运行的下垂逆变器二次调频方法。采用基于组件连接法的小信号状态空间分析法对系统参数进行分析和设计,实现了逆变器之间无需通信即可消除频率静差,且提高了逆变器下垂系数的稳定范围和多并联逆变器系统的稳定性。在MATLAB/Simulink上对多并联逆变器系统进行仿真,验证了所提方法的有效性。
关键词:  下垂控制  二次调频  小信号状态空间分析法  稳定性  逆变器
DOI:10.16081/j.epae.202202005
分类号:TM73;TM464
基金项目:国家重点研发计划项目(2018YFB1503000,2018YFB1503001);上海市科委科技计划项目(20dz1206100);上海市经信委工业强基计划项目(2021)
Secondary frequency regulation method for droop inverters in island operation
DONG Jiawei1, WANG Zhixin1, ZHU Guozhong2, BAO Jun3
1.Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2.Shanghai Chint Power System Co.,Ltd.,Shanghai 200210, China;3.Shanghai Xilong Technology Co.,Ltd.,Shanghai 201517, China
Abstract:
In order to eliminate the static frequency error of microgrid caused by droop control, a secondary frequency regulation method of droop inverters in island operation is proposed based on integral lead compensation link. The small signal state space analysis method based on component connection method is adopted to analyze and design the system parameters, which realizes the elimination of static frequency error without communication between inverters, and improves the stability range of droop coefficient of inverters and the stability of multi-parallel inverter system. The simulation of a multi-parallel inverter system in MATLAB/Simulink is carried out, verifying the effectiveness of the proposed method.
Key words:  droop control  secondary frequency regulation  small signal state space analysis method  stability  electric inverters

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