Estudo e análise da regulação de tensão e do suporte de potência reativa em sistemas integrados de transmissão de energia elétrica

Abstract

The purpose of this work is to study and analyze the voltage regulation and the reactive power support in large transmission systems of electric energy. The effects in the electric system with the use of synchronous condensers and distribution system voltage regulators were studied also the effects resulting from the demand of reactive power by the power system. With the intention to compare different situations in the power system, the ANAREDE program was used as a tool for studying. Several power system simulations were performed using the ANAREDE program, considering different loads and network configurations and also the reactive compensating devices in the system were analyzed. The conclusions obtained in the study demonstrate that synchronous condensers are very important to maintain the voltage quality of the power system when they supply reactive power to the system, in spite of the higher costs to keep such equipment. As studied, the reactive power supply is an essential ancillary service, therefore the generators units are remunerated to provide this service. The shunt capacitors are devices more versatile and not much expensive; therefore they are more used than synchronous condensers. With shunt capacitors is possible to obtain a voltage regulation on not- controlled bus, always obeying the operation limits imposed by ANEEL.