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Laila S. Ribeiro
Laboratório de Eletrônica de Potência e Acionamento Elétrico, Universidade Federal do Espírito Santo, ES
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José Leandro F. Salles
Laboratório de Eletrônica de Potência e Acionamento Elétrico, Universidade Federal do Espírito Santo, ES
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Jussara F. Fardin
Laboratório de Eletrônica de Potência e Acionamento Elétrico, Universidade Federal do Espírito Santo, ES
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Domingos Sávio L. Simonetti
Laboratório de Eletrônica de Potência e Acionamento Elétrico, Universidade Federal do Espírito Santo, ES
Keywords:
Grid Impedance Estimation, Forgetting Factor Recursive Least Squares, Island detection, Distributed Generation
Abstract
Standard 1547 by IEEE recommends that a distributed generation device should be able to detect an island and cease to energize in no more than 2 seconds. To follow this recommendation, this work presents an island detection method based on grid impedance estimation using recursive least squares. The voltages and currents measured are converted to dq coordinates before being utilized in the island detection algorithm. MATLAB and Simulink simulation results with the performance of estimated grid and load resistances and reactances and island detection signals are presented. The presented method is robust to measurements noise, and the island detection is fast and precise, allowing the equipment to cease to energize within the recommended time.
