Implementação de uma máquina síncrona virtual em um sistema fotovoltaico trifásico conectado à rede elétrica

Abstract

The huge expansion of the systems of electric power generation from renewable sources, highlighting wind and solar sources, gave rise operation challenges to the electrical power system, among which it can be highlighted: an intense variability and difficult predictability of the generated power by means of these resources, and susceptibility while facing a transient disturbance, which may cause instability. Currently, the use of renewable generation systems is possible due to its low representability on the electrical system and the hydroelectric synchronous generator’s capacity in absorbing oscillations from other sources ensuring system stability. The concept of virtual synchronous machine has been attracted growing interest in its use in systems based on power electronics, as an alternative for the control of power flow from these sources and mitigation of the effects averse to their interconnection with the electrical grid. This paper aims to present a proposal of control structures modification of a photovoltaic renewable generation system using the concept of virtual synchronous machine for effective control of power flow and contribute to the stability of the voltage and frequency of the coupling point.