Análises e soluções de problemas em sistemas de distribuição ferroviários bifásicos e isolados

Abstract

In this dissertation several analyzes are presented and a solution to the problem encountered in the distribution network at 13.8 kV railway MRS network, which is related with the presence of high capacitive reactive in the network together with imbalances issues. These issues have been shown to be common in rail distribution network of the company. Because they are typical problems of rail systems, which consist of various equipment and have specific operating characteristics also takes place in this study is a basic description of the distribution rail system, showing its main characteristics. The capacitive characteristic analyzed in this work is a possible source of problems in system operation and can be cited as an example, impacts on GMG (generator engine group) responsible for redundancy in the supply of electricity in the absence of the concessionaire, in which the action occurs the protection repeatedly, turning off the GMG overvoltage. The importance of proper system operation in question took the need for theoretical analysis of the problem, supported by practical aspects, in search of a solution. Once several hypotheses and analyzes, the investigation was focused on the capability curve of the generator versus the load supplied, known from measurements carried out by the energy analyzer. Upon further examination of this issue, contemplating calculations and measurements, come up with a solution to the problem that was implemented in practice with success, basically becoming allocation of specific reactors in the power distribution network for reactive compensation, resulting in the reduction of the capacitive current in the circuit, moving the load power factor for the stable area of the capability curve in which the GMG operates without the protection operation in addition to reducing the imbalance of power and consequently avoid improper shutdown.