Algoritmo para restauração de sistemas de distribuição considerando medições e reduzidas informações de parâmetros da rede elétrica

Abstract

This work proposes a methodology able to restore a radial electrical system in front of a contingency in any point of the system, needing little information, reenergizing the largest number of loads or priority sections. The main contribution of this work consists that the decision process used in this methodology is based only at the conditions of system’s switches and reclosers and of the pre-fault voltage and current data from system’s instrument transformers, that are information easily obtained in practice, differently of other methodologies that are dependent of other network parameters, often absent or full of uncertainties. It can be highlighted that in the proposed methodology it is not necessary the knowledge of the network impedances, load demands and controls, among other characteristics. The methodology can be summarized as follows. From the instrument transformers acquired data and the links of maneuvering devices, the algorithm is able to identify the area between the disconnectors devices where the fault occurs, and to determine which bars are unable to re-energizing in front of a restoration. After this, a load re-energizing is accomplished, respecting the feeders load limits and keeping the system radial. The restoration topology chosen by the algorithm depends of the criteria predetermined by the user, that can be the largest number of re-energized bars or the reenergization of priority system sections.