Review and Comparison of Grid-Tied Inverter Controllers in Microgrids

作者：Qing Liu, Tommaso Caldognetto, Simone Buso · 发表于：IEEE Transactions on Power Electronics · 年份：2020 · DOI：10.1109/tpel.2019.2957975 · 被引用次数：150 · 研究领域：Microgrid Control and Optimization、Islanding Detection in Power Systems、Smart Grid Energy Management

Grid-tied inverters are widely used for interfacing renewable energy sources or storage devices to low-voltage electrical power distribution systems. Lately, a number of different control techniques have been proposed to address the emerging requirements of the smart power system scenario, in terms of both functionalities and performance. This article reviews the techniques proposed for the implementation of current-controlled or voltage-controlled inverters in microgrids. By referring to a voltage source inverter with an LCL output filter, different control architectures are classified as single, double, and triple loop. Then, the functionalities that are needed or recommended in the grid-connected, islanded, and autonomous operating modes of the grid-tied inverter are identified and their implementation in the different control structures is discussed. To validate the analysis and to better illustrate the merits and limitations of the most effective solutions, six control strategies are finally implemented and experimentally compared on a single-phase, grid-connected inverter setup.