Bobine de Petersen Eletrónica: análise do regime transitório e validação experimental

Pedro Miguel da Silva Moreira

Key information

Authors:

Pedro Miguel da Silva Moreira (Pedro Miguel da Silva Moreira)

Supervisors:

Sónia Maria Nunes dos Santos Paulo Ferreira Pinto (Sónia Maria Nunes dos Santos Paulo Ferreira Pinto); José Fernando Alves da Silva (José Fernando Alves da Silva)

Published in

09/23/2020

Abstract

The electrical power system is regarded as one of the greatest achievements of the 20th century, but also one of the most complex system ever designed. In the present time, energy suppliers are growing concerns to improve the quality of the service by trying to reduce medium and long duration interruptions. Voltage magnitude and the continuity of availability of supply are the most important parameters to consider when the Quality of Energy by the consumers is pronounced. As so, new systems have been researched to implement this objective. Grounding has a fundamental role in the behaviour of voltages and currents during single-phase-to-earth faults. A new system of single-phase-to-earth faults compensation based on the Petersen Coil is studied. This system provides an inductive current in the neutral point of the network to neutralize the capacitive current that surges during an earth fault. The basics of the new system is to apply a Proportional Integral Controller to a Single-Phase Voltage Source Inverter (VSI) and to simulate an active compensation system, inserted in a 60/15kV electrical grid, using MATLAB/Simulink software. Lastly, an experimental validation of the system is performed with the assistance of dSPACE MicroLabBox equipment and active compensation of a single-phase-to-earth fault is achieved. The behaviour of the electrical grid voltages and currents is analysed. Future developments and experimentations with other voltage levels and other equipment connected to the grid are necessary to ensure the robustness and efficacy of the controller.