Contribuições em modelos e na análise do método BFS

Abstract

This work proposes the presentation and the computational development of an algorithm for power flow solution in distribution systems based on the Backward Forward Sweep (BFS) method. The algorithm contains the main steps of the traditional method and some strategies proposed separately in works in the literature. In addition, it is proposed the incorporation of the representation of the electromagnetic coupling between feeders in parallel in the line models, and studies of the impact of this representation in the power flow calculations using the BFS. A way to implement the tape control of the voltage regulators in the BFS method is also presented in detail. Such questions are usually neglected or not deeply explained in the works found in the literature that involve the analyzed method. A detailed analyzes of the BFS method are also performed and presented in this work. Some analytical evidence is developed to support these analyzes, as well as the results obtained. In this work a comparison is also made between the developed BFS method and a Newton-Raphson-based method for the distribution systems solution. The analyzes made have as main focus the investigation of the behavior of these methods when they are taken to operate in points considered critical for convergence. For this, factors such as the variation of the X/R ratio, the load’s increase up, the impact of the load modeling (ZIP model) and the impact of the presence of the voltage regulators are analyzed.