摘要
针对孤岛运行的微电网采用传统下垂控制时,无法实现母线电压与频率的无差控制问题,采用基于有限时间一致性理论,构建了一种电压频率分布式协同控制方法。首先,将通信技术与分层控制原理相结合,在减少微源之间通信压力的同时,实现系统无差调频及电压恢复;其次,针对二次控制策略,考虑微源之间的供电功率比例,提升微源使用效率,避免集中控制方式下的单点故障;最后,通过搭建多微源孤岛微电网仿真模型,验证了该方法所提控制策略的合理性及基于分布式一致性算法的二次控制策略有效性,实现了孤岛微电网电压补偿与频率的无差调节及微源的即插即用功能,提高了系统的可靠性和灵活性。
When traditional droop control is adopted for microgrids operating on isolated islands,it is impossible to achieve zero-difference control of bus voltage and frequency.Based on the theory of finite time consistency,it constructs a distributed collaborative control method for voltage and frequency.Firstly,by combining communication technology with the principle of hierarchical control,the system can achieve zero difference frequency modulation and voltage recovery while reducing the communication pressure between micro sources.Secondly,for the secondary control strategy,it considers the power supply ratio between micro sources to improve the efficiency of micro source utilization and avoid single point faults under centralized control mode.Finally,by building a simulation model of a multi micro source isolated microgrid,it verifies the rationality of the control strategy and the effectiveness of the secondary control strategy based on distributed consistency algorithm.It realizes the voltage compensation of the island microgrid,the no-difference regulation of frequency and the plug-and-play function of micro-sources,which improves the reliability and flexibility of the system.
作者
孙一宁
刘畅
董人铭
刘洪波
彭守信
SUN Yining;LIU Chang;DONG Renming;LIU Hongbo;PENG Shouxin(Marketing Service Center of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang,Liaoning 110168,China;Tongliao Heating Co.,Ltd.,Tongliao,Inner Mongolia 028000,China)
出处
《东北电力技术》
2025年第8期1-8,共8页
Northeast Electric Power Technology
关键词
孤岛微电网
协同控制
一致性算法
二次控制策略
island microgrid
collaborative control
consistency algorithm
secondary control strategy
