Chaves Eric N, Coelho Ernane A A, Carvalho Henrique T M, Freitas Luiz C G, Júnior João B V, Freitas Luiz C
Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
ISA Trans. 2016 Sep;64:373-383. doi: 10.1016/j.isatra.2016.05.002. Epub 2016 May 25.
This paper presents the design of a controller based on Internal Model Control (IMC) applied to a grid-connected single-phase PWM inverter. The mathematical modeling of the inverter and the LCL output filter, used to project the 1-DOF IMC controller, is presented and the decoupling of grid voltage by a Feedforward strategy is analyzed. A Proportional - Resonant Controller (P+Res) was used for the control of the same plant in the running of experimental results, thus moving towards the discussion of differences regarding IMC and P+Res performances, which arrived at the evaluation of the proposed control strategy. The results are presented for typical conditions, for weak-grid and for non-linear local load, in order to verify the behavior of the controller against such situations.
本文介绍了一种基于内模控制（IMC）的控制器设计，该控制器应用于并网单相脉宽调制（PWM）逆变器。文中给出了用于设计单自由度IMC控制器的逆变器和LCL输出滤波器的数学模型，并分析了采用前馈策略对电网电压进行解耦的情况。在实验结果运行过程中，使用比例谐振控制器（P+Res）对同一对象进行控制，从而展开对IMC和P+Res性能差异的讨论，进而对所提出的控制策略进行评估。给出了典型工况、弱电网和非线性本地负载情况下的结果，以验证控制器在这些情况下的性能表现。
