简要介绍移相变压器控制潮流和产生相移的基本原理及其功能，进而对其安装位置进行了研究，提出了能反映移相变压器调控效果的相对指标的概念以及能反映系统稳定性的两个指标，并且提出了移相变压器的选址方法。最后对一个九节点算例进行计算分析，结果表明本文所提出的指标和方法可以有效的选择移相变压器的安装位置。关键词：电力系统移相变压器选址ABSTRACT : The working principle and function of the phase-shifting transformer is presented briefly. And the site selection of the phase-shifting transformer is researched. This paper presents the index on reflecting the effect of regulation and the parameters on reflecting stability of the system. Also the method on site selection of the phase-shifting transformer is put forward. Finally the analysis result of a nine nodes example shows that with the presented index and method of site selection the installation position of phase-shifter can be effectively determined.KEY WORDS : electric power system ; phase-phifter ; site selection