Desenvolvimento e implementação da MSV numa estrutura de controle unificada para controladores em conversores formadores de rede

Abstract

The trend of increasing demand by distributed generation (DG) units, especially the renewable ones, results in a scenario that points out to change in the conventional system based entirely on large centralized generation units. Due to this, more power electronic converters, start to integrate the main electrical system, which motivates several works in the context of control applied to eletronic converters operating in microgrids (MG). Among the existing control techniques, the concept of the virtual synchronous machine (VSM) is recognized as a suitable approach to deal with the current and future scenario, and have gained importance due to its dynamic behavior similar to that of real synchronous generators. VSM is a way to control the converters through active and reactive power control loops, granting to the power converters properties such as inertia, wich contributes to the stability of the electrical system. In this work,a new control structure for power eletronic converters is proposed. It is a generic framework so that well known controllers like droop and VSM can be embedded to implement voltage and frequency dynamics. The validation of the structure is performed by applying the concepts of the VSM from the simulation for a three-phase system with grid and loads, and experimentally in the reduced scale microgrid developed in the research lab LaPEC.