基于模糊PCI与PR控制的三相LC型并网逆变器控制策略  

A control strategy of grid-connected inverter with three-phase LC filter based on fuzzy PCI and PR control

作　　者：杨旭红 郭凯 杨峰峰 薛冰 王阗姝 YANG Xuhong;GUO Kai;YANG Fengfeng;XUE Bing;WANG Tianshu(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Binzhou Power Supply Company,State Grid Shandong Electric Power Co.,Ltd.,Binzhou 256600,China)

机构地区：[1]上海电力大学自动化工程学院,上海200090 [2]国网山东省电力有限公司滨州供电公司,山东滨州256600

出　　处：《电力科学与技术学报》2020年第5期20-26,共7页Journal of Electric Power Science And Technology

基　　金：上海市重点科技攻关计划(上海市科委地方院校能力建设项目)(14110500700);国家自然科学基金(61203224);上海自然科学基金(13ZR1417800)。

摘　　要：针对传统PI控制交流信号时的局限性,提出模糊PCI控制,并与PR控制并联以直接控制三相逆变器并网。其中模糊PCI控制可以在给定条件下消除交流稳态误差,并根据误差的大小和变化率对PCI控制器的比例参数和积分参数进行在线调整。同时利用PR控制在谐振频率处具有无穷大增益的优势,使系统满足并网要求。该新型复合控制策略可以较好地控制交流量,能直接应用于三相ABC坐标系,省去坐标变化环节,节约逆变器控制系统成本。最后通过MATLAB/Simulink仿真平台,建立LC型滤波的逆变器并网模型,仿真分析证明了该控制策略的可行性。The traditional PI control of AC signal results a certain steady state error commonly.Under this background,a new strategy is proposed based on the fuzzy PCI control which is in parallel with a PR control.It controls the grid-connect process of the three-phase inverter directly.The fuzzy PCI control can eliminate the steady-state error under given conditions and track AC control variables accurately.The PCI proportional coefficients and ratio coefficient are adjusted online according to error and error rate.In view of the advantage PR control which has an infinite gain at the resonant frequency,the PR control is added to make the system meet the requirements of the grid-connected.The proposed compound control strategy can be utilized to control the AC signal and can be directly applied to the three-phase ABC coordinate system without a coordinate change.The cost of the inverter control system is saved.Lately,a model of grid-connected inverter with LC filter is established on MATLAB/Simulink and the feasibility of the strategy is verified.

关 键 词：逆变器并网 模糊PCI控制 模糊PCI与PR复合控制 参数在线调整 

分 类 号：TM727[电气工程—电力系统及自动化]