Regulação de tensão no ponto de acoplamento utilizando controle com ajuste automático do ganho de corrente

Abstract

The control strategies applied to distributed generation systems have used control strategies based on the slope of the active and reactive power curves to achieve reliable operation and the quality of electricity in the utility grid. However, this power based strategy has limitations, such as slow time response, problems with load variations, fluctuations in the voltage level at the coupling point and problems in the power sharing between the distributed generation units. In this dissertation, a control strategy is proposed, based on the coupling point voltage. From the voltage information at the coupling point and the current injected in the utility grid by a distributed generation unity, the current gain gradient of the distributed generation unit is calculated, that is, a control based on V −I. Tellegen’s theorem and Kirchhoff laws are used to obtain mathematical modeling. A comparison is performed between both controls in terms of response time and point control of the coupling point voltage. At the end of the work, a table of activities is proposed to complete the dissertation.