Comparison of Virtual Synchronous Generator Strategies for Control of Distributed Energy Sources and Power System Stability Improvement

Guilherme  Penha da Silva Júnior; Thiago  Figueiredo do Nascimento; Luciano  Sales Barros

doi:10.48011/sbse.v1i1.2482

Guilherme Penha da Silva Júnior Federal University of Rio Grande do Norte
Thiago Figueiredo do Nascimento Federal University of Rio Grande do Norte
Luciano Sales Barros Federal University of Paraiba

DOI: https://doi.org/10.48011/sbse.v1i1.2482

Keywords: Renewable energy, Power system, Virtual synchronous generator, Microgrids

Abstract

The high integration of distributed generation (DG) system based on renewable energy sources (RES) in the power system requires changes regarding the control mode of these sources with some urgency. Such changes seek to maintain the stability of the power systems. Thus, there is a demand for using control techniques on DGs/RESs that can mitigate the disturbances caused by low inertia and the lack of control over the dispatched powers. As a solution, one can use virtual synchronous generator (VSG) techniques making the voltage source inverter (VSI) control behave similarly to the traditional synchronous generator (SG). This paper presents a literature review and performance tests for the main VSG topologies used in DGs/RESs: ISE, VSYNC, VISMA and Synchronverter. The implementation of VSG in the DGs/RESs has made possible increase inertia in the grid and, additionally regulate the active and reactive powers separately and bidirectionally. So, it has been possible to meet power system requirements; being able to operation both grid-connected or island-mode, which is ideal for microgrids. The results obtained confirm the literature reports. It was observed that the Synchronverter topology presented advantages over the other VSG topologies.