基于改进粒子群优化权函数的直流微电网H_(∞)控制策略  

H_(∞) Control Strategy for DC Microgrid Based on Improved Particle Swarm Optimization Weight Function

作　　者：马文忠[1] 王源航 高健壹 李维国 么旻蕊 黄建伟 MA Wenzhong;WANG Yuanhang;GAO Jianyi;LI Weiguo;YAO Minrui;HUANG Jianwei(School of New Energy,China University of Petroleum(East China),Qingdao 266580,Shandong Province,China;Shandong Energy Group Co.,Ltd.,Jinan 250014,Shandong Province,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东省青岛市266580 [2]山东能源集团,山东省济南市250014

出　　处：《现代电力》2024年第3期431-440,共10页Modern Electric Power

基　　金：国家自然科学基金项目(51777216);山东省自然科学基金项目(ZR2018MEE040,ZR2019MEE094)。

摘　　要：直流微电网中常常含有恒功率负载(constant power loads,CPLs),其负阻抗特性会降低系统的稳定性,造成直流母线电压波动甚至崩溃。因此,首先建立了直流微电网的小信号模型,使用根轨迹法分析了恒功率负载对系统稳定性的影响;其次提出一种基于混合灵敏度优化的电压控制策略,提升了直流微电网系统的稳定性,并采用改进粒子群优化(particle swarm optimization,PSO)算法对权函数进行了优化,进一步提升了鲁棒控制器的性能;最后采用Matlab/Simulink仿真算例进行验证,仿真结果表明提出的鲁棒控制器减小了母线电压的波动,有效提升了直流微电网系统的稳定性。DC microgrids often contain constant power loads(abbr.CPLs),whose negative impedance characteristics can reduce the stability of the system,causing DC bus voltages to fluctuate and even collapse.Therefore,firstly,a small-signal model of DC microgrid is established,and the influence of constant power load on system stability is analyzed using the root trajectory method;secondly,a hybrid sensitivity optimizationbased voltage control strategy is proposed to improve the stability of the DC microgrid system,and an improved particle swarm optimization(abbr.PSO)algorithm is used to optimize the weight function and further improve the performance of the robust controller;finally,a Matlab/Simulnik simulation is used to verify the performance of the robust controller,and the simulation results show that the proposed robust controller reduces the bus voltage fluctuation and effectively improves the stability of the DC microgrid system.

关 键 词：直流微电网 稳定性分析 母线电压 H_(∞)控制 粒子群算法 

分 类 号：TM46[电气工程—电器]