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Development of a methodology for stability study and analysis of multiple parallel inverters in microgrids

Grant number: 22/07811-3
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2022
Effective date (End): August 31, 2026
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal Investigator:Helmo Kelis Morales Paredes
Grantee:José de Arimatéia Olímpio Filho
Host Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

This project proposes the implementation and development of a methodology for studying stability analysis of parallelism of grid-tied inverters based on passivity, with the objective of guaranteeing the stability of the system considering the variation of the inductance and resistance characteristics of the grid aiming finding the better values of gain of the controllers of the internal current loop, thus guaranteeing the operation of the system in the desired operating range. In this way, the electronic power converter will be able to inject active and reactive power into the utility grid. The main objective is based on theoretical and experimental studies in order to validate, through the passivity-based criterion, the stability of multiconverter systems based on the observation of the input impedance of the controlled converter. Finally, simulation results are used to validate the proposed method and to show its effectiveness. It is worth noting that the methodology and control system will be evaluated and tested in a laboratory bench. (AU)

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