1000kV特高压发电机升压变压器在火电厂的应用

Application of 1000kV Ultra-high Voltage Step-up Transformer in Coal-fired Power Plants

平圩三期2×1000MW扩建工程(以下简称:本工程)发电机升压变压器采用27k V直升电压至1000k V特高压接入系统,这一升压方式在全国乃至世界尚属首例。本文对本工程项目背景、来源及其重要意义予以说明,重点对1000k V发电机变压器的设计难点、结构特点、技术参数及应用运行情况等方面进行了介绍,并提出相关建议。该方案的实施,为今后1000k V特高压类似电厂项目建设起到了积极的示范作用。

In Pingwei Ⅲ phase 2×1000 MW extension project(hereinafter referred to as "the project"), the generator step-up transformer(hereinafter referred to as "the main transformer") directly transforms the generator output 27 k V to 1000 k V Ultra-high voltage(UHV) power grid, which is the first step-up mode in China and even in the world. In this paper, we describe the background, source and significance of the project focusing on the technology roadmap, design difficulties and structural features in 1000 KV generator-transformer. And we put forward relevant suggestions. The implementation of the scheme has played a positive role model for future similar plants 1000 k V UHV system project.