基于模糊PCI与PR控制的三相LC型并网逆变器控制策略
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杨旭红(1969),女,博士,教授,主要从事新能源电网控制技术、核电和火电机组的仿真及控制技术研究;Email:yangxuhong.sh@163.com

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TM727

基金项目:

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)


A control strategy of gridconnected inverter with threephase LC filter based on fuzzy PCI and PR control
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    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。

    Abstract:

    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 gridconnect process of the threephase inverter directly. The fuzzy PCI control can eliminate the steadystate 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 gridconnected. The proposed compound control strategy can be utilized to control the AC signal and can be directly applied to the threephase ABC coordinate system without a coordinate change. The cost of the inverter control system is saved. Lately, a model of gridconnected inverter with LC filter is established on MATLAB/Simulink and the feasibility of the strategy is verified.

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杨旭红,郭凯,杨峰峰,等.基于模糊PCI与PR控制的三相LC型并网逆变器控制策略[J].电力科学与技术学报,2020,35(5):20-26.
YANG Xuhong, GUO Kai, YANG Fengfeng, et al. A control strategy of gridconnected inverter with threephase LC filter based on fuzzy PCI and PR control[J]. Journal of Electric Power Science and Technology,2020,35(5):20-26.

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  • 在线发布日期: 2021-04-16
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