摘要
电力电子设备的强非线性、模型误差以及外部系统扰动给配电网的电压稳定控制带来巨大挑战.多逆变器分布式协同抗扰控制是提升配电网电压稳定性的一种新思路.首先,将复杂的逆变器高维模型转换为输入-输出等效模型,利用高增益扩展状态观测器对系统中多种扰动影响进行估计;同时,根据一致性协同控制理论设计多逆变器的分布式协同控制策略,结合扰动估计结果,实现逆变器网络的电压协同控制和主动扰动抑制.为确保协同控制的动态性能,从图论和网络控制的角度提出通信拓扑优选方法.在PowerFactory软件中搭建由4个逆变器构成的配电网测试系统,仿真结果表明:所提控制策略和通信拓扑优选方法能够实现多逆变器的电压协同跟踪调控以及扰动抑制.
Voltage stability control in distribution grids faces challenges due to strong nonlinearity,modeling error of power electronic devices,and external disturbances.Distributed cooperative disturbance-rejection control of multiple inverters is a novel and promising approach to improve voltage stability in distribution grids.First,the high-dimension model of inverters is simplified into an equivalent input-output model.An extended state high-gain observer is utilized to estimate the effects of multiple disturbances in the equivalent model.Then,a distributed cooperative control strategy for multiple converters is designed based on the consensus theory,achieving coordinated voltage control and active disturbance suppression by integrating the disturbance estimation results.To ensure the dynamic performance of the distributed controller,an optimal topology selection method is proposed based on the graph theory and network control system.A test system consisting of four inverters is built in PowerFactory to verify the proposed control strategy.The simulation results show that the proposed control strategy effectively realizes coordinated voltage tracking control and suppress external disturbances.
作者
全少理
于昊正
马杰
王炜宇
郭勇
陈春
QUAN Shaoli;YU Haozheng;MA Jie;WANG Weiyu;GUO Yong;CHEN Chun(Economic and Technological Research Institute,State Grid Henan Electric Power Company,Zhengzhou 450052,China;College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《上海交通大学学报》
北大核心
2025年第5期605-616,共12页
Journal of Shanghai Jiaotong University
基金
国网河南省电力公司科技项目(5217L0220013)。
关键词
配电网
高增益观测
分布式控制
一致性理论
抗扰控制
distribution grid
high gain observer
distributed control
consensus theory
disturbance rejection control
