Simulações das respostas de conversores de potência em regime permanente.

Abstract

In this work digital simulations are performed to analyse the steady-state response of power converters. Transient techniques as well as methods for accelerating the convergence to the steady state are used. In order to accomplish the latter task, two approaches are investigated. In the first one, harmonic admittance matrices from the power electronic circuits are used to obtain the steady state responses. This technique is based on the balance harmonic method. The second one is also employed for simulating directly the steady state and it is considered a novel technique, based on the definition of a differentiation matrix. It is simple to apply and is rapidly-convergent. The responses of several circuits, some of them with feedback control and soft-switching, are presented. They are compared with the responses obtained with the technique used in the Electromagnetic Transients Programs (EMTP).