Controle Baseado em Potência Aplicado em Geradores Distribuídos em uma Microrrede de Baixa Tensão

Abstract

This work consists in the application of the power-based control technique in the management of power flow in distributed energy resources connected to a low-voltage microgrid. The microgrid is composed of six single-phase H-bridge converters, three connected between phase-neutral and three with phase-phase connection sharing a single DC bus controlled by an active PWM (Pulse Width Modulation) rectifier. The converters used are current mode controlled, injecting or absorbing active and reactive power in the micro-grid to meet the specifications of the AC grid. A low speed communication structure based on the CAN 2.0 protocol establishes the communication between the DERs and the master controller, which is responsible for determining the energy contributions of each converter allowing the proportional sharing of power among them and regulating the power flow in the PAC. The results obtained through the experimental prototype, show that the power based control, guarantees in permanent regime a stable active and reactive power following the requested reference and the proportional sharing of power among the DERs according to their maximum capacities.