Avaliação de técnicas de representação de limites operacionais nos problemas de fluxo de potência e fluxo de potência ótimo

Abstract

This dissertation evaluates techniques for representing reactive power generation limits in solving the power flow and optimal power flow problems. It discusses the main techniques for solving this problem and presents a new modeling approach for addressing these limits in optimal power flow. This approach includes an equation in the problem formulation that uses three modified sigmoid functions to act as switches, incorporating the behavior of PV buses. These functions assess the generated power relative to the reactive power limits and the voltage relative to the specified voltage. Thus, both normal operation behavior and the backoff mechanism are reproduced for PV buses. All computational development was done in Python 3, and the results were validated using the ANAREDE network analysis program, academic version, provided by the Electric Energy Research Center (CEPEL). The model is evaluated and compared using the IEEE 14 and New England systems.