Influência dos tipos de reguladores de tensão e velocidade no desempenho dinâmico de geradores síncronos em sistemas de distribuição de energia utilizando o software PSP-UFU.

Abstract

This study consists of analyzing the dynamic performance of synchronous generators and their controls, in a distributed generation system, using the PSP-UFU software. For this analysis, different types of regulators, both voltage and speed, are implemented to determine which one has the best control response for frequency, voltage and system stability. Regulators were used following the IEEE models suitable for the synchronous machine, such controls were implemented in the PSP. The test system chosen to represent a distribution system was the IEEE 13 buses, the analyzes consist of the study of the system in relation to the sudden increase in load, short circuits in the buses, duration of faults, thus analyzing the response of the controls of the machine. With the results obtained, it was possible to evaluate aspects of power quality (voltage magnitude, frequency, etc.), machine stability and the influence that controls have on synchronous machines. These analyzes are carried out in two different scenarios, in the first, the distribution system is characterized by having high short-circuit power and a high inertia value, which was called “Strong system”. The second system is characterized by having a small short-circuit power and low inertia value, called “Weak system”. The performance of voltage and speed regulators in these analyzes was proven, showing the importance of their use to improve oscillations in the aspects of power quality, reduce voltage and frequency unbalance and return these values to stability. Although the regulators have the same function, it is clear that for each model used there is a unique response in its performance, depending on the type of fault occurred in the system. For the first system (strong network), the DC1 and hydraulic type regulators obtained better responses in the stability control of the system, while for the second system (weak network), all controls presented unique responses depending on the type of fault, being more detailed in chapter four.