Análise de um controle que visa a regulação de frequência e tensões em microrredes CA

Abstract

The present work presents an analysis of a frequency and voltage regulation in the secondary control level of an AC Microgrid. Such proposal is used in microgrids operating in an isolated way from the electric power system. One of the characteristics of an energy microgrid is the parallelism of voltage inverters, therefore, the controls used must maintain the stability of the system, distributing the active and reactive powers between the units in an equitable manner, in addition to maintaining the frequency and voltages adequate levels of operation. For this, a hierarchy control is necessary, which must exchange information between the units that integrate the microgrid. In this work, a study is made about the controls that make up the hierarchy, being internal, primary, secondary and tertiary, giving a special focus to the primary and secondary. The main contribution is the analysis of a secondary control scheme, through extensive simulations, the results of which are discussed and weighted. The work provides some characteristics about this control, in addition to demonstrating how it behaves in different situations common to the electrical system, as well as discussing the quality of the energy delivered to the load.