Bruno Leandro Galvão Costa, S. A. Oliveira da Silva
{"title":"Optimized Simultaneous Tuning of VSI Controllers in Autonomous Microgrids Using Differential Evolution Metaheuristic","authors":"Bruno Leandro Galvão Costa, S. A. Oliveira da Silva","doi":"10.1109/COBEP53665.2021.9684122","DOIUrl":null,"url":null,"abstract":"This paper proposes a differential evolution metaheuristic application for simultaneous tuning of parallel-connected three-phase voltage source inverter (VSI) controllers allocated in an autonomous microgrid. The VSIs structures are composed of power-sharing, voltage, and current controllers that dictate the dynamics performance of the microgrid. The tuning of the controllers is modeled as an optimization problem. This procedure involves minimizing a cost function based on a weighted sum of deviations between instantaneous and nominal active/reactive powers, inner control loop errors, control signals saturation, active power-sharing errors, and the total harmonic distortion of the output voltages. It is considered an eigenvalue stability analysis based on a complete autonomous microgrid small-signal model for defining the search range of the optimization parameters by combining three major sub-modules: droop-controlled three-phase VSIs, network and loads, in conjunction with the frequency response method in terms of phase margin and 0dB crossover frequency. Simulation results are obtained to evidencing the effectiveness of the proposed approach.","PeriodicalId":442384,"journal":{"name":"2021 Brazilian Power Electronics Conference (COBEP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 Brazilian Power Electronics Conference (COBEP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/COBEP53665.2021.9684122","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This paper proposes a differential evolution metaheuristic application for simultaneous tuning of parallel-connected three-phase voltage source inverter (VSI) controllers allocated in an autonomous microgrid. The VSIs structures are composed of power-sharing, voltage, and current controllers that dictate the dynamics performance of the microgrid. The tuning of the controllers is modeled as an optimization problem. This procedure involves minimizing a cost function based on a weighted sum of deviations between instantaneous and nominal active/reactive powers, inner control loop errors, control signals saturation, active power-sharing errors, and the total harmonic distortion of the output voltages. It is considered an eigenvalue stability analysis based on a complete autonomous microgrid small-signal model for defining the search range of the optimization parameters by combining three major sub-modules: droop-controlled three-phase VSIs, network and loads, in conjunction with the frequency response method in terms of phase margin and 0dB crossover frequency. Simulation results are obtained to evidencing the effectiveness of the proposed approach.