An Approach for Load Shedding in Islanded Microgrids

Wesley Peres; Francisco C. R. Coelho; Raphael P. B. Poubel; Junior N. N. Costa

doi:10.20906/sbse.v2i1.2982

Wesley Peres Departamento de Engenharia Elétrica, Universidade Federal de São João del Rei – UFSJ, São João del-Rei, Minas Gerais
Francisco C. R. Coelho Departamento de Engenharia Elétrica, Universidade Federal de São João del Rei – UFSJ, São João del-Rei, Minas Gerais
Raphael P. B. Poubel Departamento de Engenharia Elétrica, Centro Federal de Educação Tecnológica de Minas Gerais – CEFET-MG, Belo Horizonte
Junior N. N. Costa Departamento de Engenharia Elétrica, Universidade Federal de São João del Rei – UFSJ, São João del-Rei, Minas Gerais

DOI: https://doi.org/10.20906/sbse.v2i1.2982

Keywords: Microgrid, Islanded Operation, Load Shedding, Optimal Power Flow, Steady-State Frequency Regulation

Abstract

This paper proposes an Optimal Power Flow for defining the minimum load to be shed to maintain the steady-state frequency between allowable limits in islanded microgrids. The droop coefficients and setpoints (no-load voltage and frequency of each Distributed Generator) are optimized considering the limits of microgrid frequency, nodal voltages, and power generation (apparent and reactive powers). The approach is applied to a microgrid of 33 nodes, considering a 24 hours time-horizon. The found results point to the methodology effectiveness.