Estrategia de control para la reducción del desbalance de tensión en microredes eléctricas.

Abstract

This master's thesis focuses on control strategies that will allow reducing voltage imbalance in electrical networks supported by electronic inverters. Voltage imbalance is one of the main problems affecting electrical and electronic equipment, presenting itself as resonances, energy losses, premature deterioration and operating defects. This problem becomes critical within isolated microgrids, because the generating sources are not connected to a main network that supports them, which is why, in this context, the voltage regulation of the microgrid depends on the type of power converter used and the way of controlling the regulation of the electrical network. To attack the problem described above, different control schemes existing in recent research were studied, and the problems generated as a consequence of voltage imbalances were delved into. Then, we proceeded with the implementation of these control models in simulink®. Once they were implemented, different test scenarios were generated to determine which of them presented the best performance. With the strategy that presented the best performance, an improvement was proposed that would allow its operation to be automated under variable conditions of imbalance, guaranteeing the stability of the system. Different tests carried out on simulation models allowed validating the operation of the proposed improvement.