Анализ энергетических показателей тягового выпрямителя с широтно-импульсным регулированием

Abstract

RU: В статье выполнен анализ энергетических показателей выпрямительной установки тяговой подстанции с вольтодобавочным преобразователем, управляемым широтно–импульсной модуляцией. Получено аналитическое выражение для коэффициента мощности с учетом влияния на него коэффициента трансформации и коэффициента заполнения импульсов ШИМ.

EN: In the article a rectifier for the feed of electric transport is considered. This rectifier consists of the serial united bridge circuit of rectifying, which are connected in series. The first rectifier creates basic part of output voltage, and the second is used for control and stabilization of supply voltage. It is suggested to carry out control by pulse-width control method. A basic power index – power-factor is analysed. For its finding an original method which is based on equality of active-powers, which consumed from a network and given in loading is offered. It allows to exclude bulky procedure of harmonic analysis and get analytical character expression for a power-factor. Such parameters, as coefficient of transformation and duration of pulse-width control, are taken into account. By MATHCAD was built family of plots which shows, that the offered system possesses high power indexes, that promotes substantially economies of electric power.