Three-phase four-wire grid-forming converter connected to microgrid with unbalanced nonlinear load

• Grant number: 22/00317-3
• Support Opportunities: Scholarships abroad - Research
• Start date: September 05, 2022
• End date: September 04, 2023
• Field of knowledge: Engineering - Electrical Engineering - Industrial Electronics, Electronic Systems and Controls
• Principal Investigator: Claudionor Francisco Do Nascimento
• Grantee: Claudionor Francisco Do Nascimento
• Host Investigator: Simone Buso
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Institution abroad: Università degli Studi di Padova, Italy
• Associated research grant: 16/08645-9 - Interdisciplinary research activities in electric smart grids, AP.TEM

Abstract

A microgrid with neutral conductor, generally, is composed of inverters, grid-forming convertes, units of renewable energy sources and several three-phase and single-phase local linear and nonlinear loads (in condition of unbalanced loads). Thus, there can be a significant increase of the unbalance and distortion at the point of common connection (PCC), which imposes additional restrictions and considerations on the control of the inverters connected to the microgrid, because of the oscillating voltage at DC side. In this context, the present project aims to analyze a three-phase four-wire voltage source converter (VSC) connected or isolated from the microgrid (isolated or not from the utility), which is controlled as a grid-forming converter. Therefore, the main result of this project is to improve the modeling of the conversion system with a four-wire VSC with split capacitor. It is intended to use the VSC modeling and control system based on the digital models and controls developed in the UNIPD, using the Typhoon HIL 402 platform. Thereby, it becomes possible to analyze the oscillating voltages and currents at each DC capacitor of the VSC, which are generated by the unbalanced and distorted currents at the PCC. In addition, it is expected that the results arising from this project can contribute to the state of the art and development of the four-wire VSC with split capacitor, with consequences in the academic and industrial sectors. (AU)

Scientific publications

(4)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

DO NASCIMENTO, CLAUDIONOR F.; BUSO, SIMONE; DE SOUZA, WESLEY ANGELINO. Design of Digital Controllers for Grid-Connected Voltage Source Converter Operating as Voltage or Current Source. ENERGY INFORMATICS, EI.A 2023, PT II, v. 14468, p. 17-pg., 2024-01-01. (22/00317-3, 16/08645-9)

DIENE, OUMAR; NASCIMENTO, CLAUDIONOR FRANCISCO; WATANABE, EDSON HIROKAZU; ROLIM, LUIS GUILHERME BARBOSA; ALVES, ANDRE GUILHERME P.. Analysis of Grid-Connected Three-Phase Three-Wire Voltage-Source Converters Operating with Unbalanced Conditions. JOURNAL OF CONTROL AUTOMATION AND ELECTRICAL SYSTEMS, v. 35, n. 1, p. 13-pg., 2023-11-02. (22/00317-3, 16/08645-9)

DO NASCIMENTO, CLAUDIONOR F.; BUSO, SIMONE; SOUZA, WESLEY A.; AGULHARI, CRISTIANO M.; POMILIO, JOSE A.. Analytical modelling of three-phase four-wire grid-connected inverter under unbalanced conditions applying digital controllers. SYSTEMS SCIENCE & CONTROL ENGINEERING, v. 13, n. 1, p. 28-pg., 2025-12-31. (16/08645-9, 22/00317-3)

BERNARDINO, LUIZ G. R.; DO NASCIMENTO, CLAUDIONOR F.; SOUZA, WESLEY A.; MARAFAO, FERNANDO P.; ALONSO, AUGUSTO M. S.. Deep HarDec: Deep Neural Network Applied to Estimate Harmonic Decomposition. ENERGY INFORMATICS, EI.A 2023, PT I, v. 14467, p. 18-pg., 2024-01-01. (22/00317-3, 16/08645-9)