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Current Control Strategy of Photovoltaic Grid-Connected Inverter Based on Passivity
Pages: 176-182
Year: Issue:  11
Journal: Transactions of China Electrotechnical Society

Keyword:  光伏并网逆变器 无源控制 阻尼注入 解耦;
Abstract: 针对光伏并网逆变器的数学模型呈现非线性特性,采用无源控制(PBC)理论得出的算法对逆变器进行控制,可使并网逆变器具备优良的动、静态特性。本文根据并网逆变器的欧拉-拉格朗日(EL)数学模型和严格无源性,得到了使逆变器网侧dq轴电流解耦的无源控制律。为提高逆变器的动态性能,采用注入阻尼方法对控制器进行了优化设计,实现对给定电流及最大功率点快速跟踪。计算机仿真和4kW样机试验均表明,基于无源性的光伏并网逆变器电流控制策略是可行的。
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