摘要
针对现阶段以虚拟同步发电机(virtual synchronous generator,VSG)为基础的孤岛微电网电压二次控制中存在对连续通信依赖度高、计算收敛上界与实际收敛时间差异较大的问题,提出了一种结合事件触发机制的预设时间一致性算法。首先,根据状态误差越限设计事件触发机制,使各逆变器仅需与相邻逆变器进行少量间断通信,即可在用户设定时间内实现电压无差恢复和无功功率按容量分配。然后,从理论上分析了所提方法的收敛性,并排除了芝诺行为出现的可能。最后,搭建孤岛微电网测试系统进行仿真实验,结果表明系统可在设定时间内完成收敛。且相比连续通信方案,在几乎不影响恢复性能的前提下,通信次数减少超过99%,显著提升了微电网的效率与灵活性。
For islanded microgrids using virtual synchronous generator-based secondary voltage control,existing approaches depend heavily on continuous communication and exhibit a significant gap between the theoretical convergence upper bound and the actual convergence time.To address these issues,this paper proposes a preset-time consensus algorithm enhanced with an event-triggered mechanism.First,an event-triggered strategy is designed based on state error thresholds,enabling each inverter to communicate intermittently and only with its neighbors.This achieves voltage restoration without deviation and reactive power sharing according to inverter rating within a user-specified time.Then,the convergence of the proposed method is theoretically analyzed,and the possibility of Zeno behavior is excluded.Finally,a simulation platform of an islanded microgrid is built and the test results show that the system converges within the preset time.Compared with continuous communication schemes,the proposed method reduces communication events by more than 99%with almost no loss in recovery performance,significantly improving the efficiency and flexibility of microgrid control.
作者
贾浩洋
李斌
胡丹丹
王浩
高康佳
JIA Haoyang;LI Bin;HU Dandan;WANG Hao;GAO Kangjia(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Henan International Joint Laboratory of Direct Drive and Control of Intelligent Equipment(Henan Polytechnic University),Jiaozuo 454003,China;Jiaozuo Power Supply Company of State Grid Henan Electric Power Company,Jiaozuo 454000,China)
出处
《电力系统保护与控制》
北大核心
2025年第23期176-187,共12页
Power System Protection and Control
基金
河南省科技攻关项目资助(242102241056)
河南省高等学校重点科研项目资助(25B470003)。
关键词
孤岛微电网
虚拟同步发电机
事件触发
预设时间一致性
电压二次控制
islanded microgrid
virtual synchronous generator
event-triggered control
preset-time consensus
secondary voltage control
