Reactive power sharing among distributed generators in a microgrid by using virtual current

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 obtainedby 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 withtwo generators and a load with five households and implemented in MATLAB/Simulinksoftware. 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 rapidtransient response of the system

• Autores: Molina Vilora, Eder Alexander; Candelo Becerra, John Edwin; Hoyos Velasco, Fredy Edimer
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2021
• Institución: Tecnológico de Antioquia
• Repositorio: Repositorio Tdea
• Idioma: eng
• OAI Identifier: oai:dspace.tdea.edu.co:tdea/3053
• Acceso en línea: https://dspace.tdea.edu.co/handle/tdea/3053
• Palabra clave: Distributed generation; Generación distribuida; Microgrid; Microrred; Reactive power sharing; Reparto de potencia reactiva; Virtual current; Corriente virtual; Virtual impedance; Impedancia virtual
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-sa/4.0/