基于静止无功补偿的单相变三相电源变换研究

Study on One-phase to Three-phase Converter Based on Static Var Compensation

单相电源变换为三相电源的技术在电气化铁道辅助用电和偏远山区供电方面有广泛的应用前景,寻找一种电源变换技术为这些用电场所提供高性价比的三相电源具有现实意义,但其技术问题一直未能很好解决。本文介绍单相交流电源变为三相交流电源的分相原理,给出单相电源变换为三相电源的2个理论方案;介绍晶闸管控制电抗器(TCR)和晶闸管投切电容器(TSC)的工作原理,与单相电源变换为三相电源的原理相结合,提出分别基于TCR和TSC的单-三相电源变换器的实现方式,进而得出适用于电气化铁道和偏远山区供电的单-三相电源变换设计方案。

The technology of converting single-phase AC to three-phase AC has the prospect of wide application in electrified railways and remote mountainous districts. However, the related technical issues have not been well solved for a long time. It is of practical significance to find a single-phase to three-phase conversion technique to supply good price-performance three-phase power where it is needed. In this paper, the split-phase principle and two theoretical schemes to convert one-phase AC to three-phase AC are introduced; the working theory of TCR and TSC is introduced; according to the theory of converting single-phase AC to three-phase AC and the theory of TCR and TSC, the implementation mode of the TCR-based and TSC-based single-phase to three-phase converters is put forward. Thus, the single-phase to three-phase converter applicable to electrified railways and remote mountainous districts is formed.