大岗山机组励磁变压器设计特点及绝缘方式研究

Design features and insulation mode of excitation transformer of generating units in Dagangshan Hydropower Station

当前对于大型水轮发电机组来说,其励磁方式一般是选择静止的励磁系统,励磁变压器则是静止励磁系统中一个非常重要的组成部分。励磁变压器参数、绝缘方式的合理选择以及过电压保护的配合,对整个励磁系统安全、稳定以及可靠运行相当重要。介绍了大岗山水电站励磁变压器基本参数、绝缘方式的选择确定过程及其结构特点,并对励磁变压器的过电压保护进行了初步分析。

Excitation transformer is a crucial part of static excitation system that is a common excitation way for large generating units. It is quite significant for the safe,stable and reliable operation of whole excitation system to select the parameters and insulation mode reasonably and coordinate with over-voltage protection well. The paper introduces the selection and their structural features of basic parameters and insulation mode for excitation transformer in Dagangshan Hydropower Station. The over-voltage protection of excitation transformer is also analyzed.