基于果蝇算法的电网不平衡时并网逆变器多目标优化控制研究  

Research on Multi-Objective Optimization Control of Grid-Connected Inverter Under Unbalanced Grid Voltage Based on Fruit Fly Algorithm

作　　者：万晓凤[1] 郗瑞霞 胡海林[1] 万小利 WAN Xiaofeng;XI Ruixia;HU Hailin;WAN Xiaoli(School of Information Engineering, Nanchang University, Nanchang 330031, Jiangxi Province, China;Nanchang Institute of Technology, Nanchang 330044, Jiangxi Province, China)

机构地区：[1]南昌大学信息工程学院,江西省南昌市330031 [2]南昌理工学院,江西省南昌市330044

出　　处：《电网技术》2018年第5期1628-1635,共8页Power System Technology

基　　金：国家国际科技合作专项(2014DFG72240);江西省科技落地计划(KJLD14006);江西省研究生创新创业项目(YC2017-S105)~~

摘　　要：在电网不平衡情况下并网逆变器的输出存在三相电流不平衡、有功及无功功率二倍频波动。为提高并网逆变器输出的电能质量,提出一种基于果蝇算法的电网不平衡时并网逆变器多目标优化控制策略。该方法采用瞬时功率直接计算得到建立不同控制目标下含参的统一电流参考矢量解析表达式,并基于各目标下的波动相对值建立起多目标函数表达式,利用果蝇算法对多目标函数的参数解进行全局寻优,从而得到优化后的电流参考值,实现并网逆变器的优化协调控制,提升了并网逆变器在不平衡电网条件下整体的控制性能。仿真实验表明,所提优化策略和所采用的智能群体寻优算法的可行性和有效性。1 In case of grid imbalance, output of gridconnected inverter has three-phase current imbalance with active and reactive power double frequency fluctuation. In order to improve power quality of grid-connected inverter, a multi-objective optimization control strategy of grid-connected inverter based on fruit fly algorithm is proposed. This method uses instantaneous power to calculate expression of unified current reference vector with different parameters under control of the instantaneous power. Based on relative value of the fluctuation under each target, the multi-objective function expression is established with fruit fly algorithm. Parameter optimization for global optimization is performed after the reference current value is obtained, to achieve optimal coordination of grid-connected inverter control, and improve overall control performance of the grid-connected inverter in unbalanced grid condition. Simulation results show that the proposed optimization strategy and the intelligent group optimization algorithm are feasible and effective.

关 键 词：电网不平衡 果蝇算法 并网逆变器 多目标优化 

分 类 号：TM721[电气工程—电力系统及自动化]