ANALYSIS OF A EOLIC-PHOTOVOLTAIC HYBRID GENERATION WITH SYNCHRONVERTER FOR FREQUENCY AND VOLTAGE SUPPORTS IN A MICROGRID

Maxwel d a Silva Santos; Luciano  Sales Barrosy; Rafael Lucas  da Silva França; Flavio Bezerra Costa; Camila Mara  Vital Barrosy; Kai  Strunzz

doi:10.48011/asba.v2i1.1277

Maxwel d a Silva Santos Universidade Federal do Rio Grande do Norte
Luciano Sales Barrosy Universidade Federal da Paraíba
Rafael Lucas da Silva França Universidade Federal do Rio Grande do Norte
Flavio Bezerra Costa Universidade Federal do Rio Grande do Norte
Camila Mara Vital Barrosy Universidade Federal da Paraíba
Kai Strunzz Technische Universitat Berlin

DOI: https://doi.org/10.48011/asba.v2i1.1277

Keywords: Eolic-photovoltaic hybrid distributed generation, Full-power converter, Microgrid, Synchronverter, Virtual synchronous generator

Abstract

A microgrid consists of a grid capable of operating in connection to the main interconnected power system or in island mode. This paper deals with a microgrid containing a small hydroelectric power plant (HPP), a battery energy storage system (BESS), a wind energy conversion system (WECS), and a photovoltaic array (PV). The WECS and PV systems are connected to the grid through one full-power voltage source converter (VSC). In order to provide frequency and voltage supports to the microgrid, the VSC is controlled by a virtual synchronous generator (VSG) technique of synchronverter. The considered scenario was divided into three parts: first, the microgrid operates connected to the main system and then it starts operating in island mode; posteriorly, frequency and voltage variations occur due to load variations in the microgrid; finally, the microgrid returns to operate connected to the interconected system. Simulation results have shown that the synchronverter is an alternative to provide efficient frequency and voltage control to a microgrid for both connected and island modes, considering a hybrid generation unit.