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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Eder A. Molina-Viloria
Universidad Nacional de Colombia
Control & Systems Engineering Electrical & Electronics Engineering

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Reactive power sharing among distributed generators in a microgrid by using virtual current Eder A. Molina-Viloria; John Edwin Candelo Becerra; Fredy Edimer Hoyos Velasco
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 12, No 1: March 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v12.i1.pp99-111

Abstract

This paper presents a new autonomous effective power distribution control strategy for three-phase parallel inverters. The proposal uses a controller that can provide the system with accurate power sharing among distributed generators installed in the microgrid once some load variations are presented in the network. The methodology uses a virtual current loop introduced into the current controller of the inverter to optimize the output signal, which goes directly to the PWM. This virtual current is obtained by using a virtual impedance loop. Furthermore, a small-signal model of the system is used to check stability of the proposed control strategy, which was developed for island mode operation of the microgrid. Simulations were performed for a microgrid with two generators and a load with five households and implemented in MATLAB/Simulink software. The results show that the model provides a wide margin of stability and a rapid response when electrical loads change, thus fulfilling the reactive power sharing among generators. The proposed method shows a large margin of stability and a rapid transient response of the system.
Co-Authors Fredy Edimer Hoyos Velasco John Edwin Candelo Becerra