高压厂用变压器分支开关的选型和应用

大机组高压厂用变压器侧引线发生短路时,使用何种方式切断短路电流,是困扰电力系统的一大难题。笔者从安全性、可靠性和经济性的角度阐述了高压厂用变压器分支开关的选型;简要介绍了FSR大容量快速开关的原理和特点;分析了在高压厂用变压器高压侧套管处发生短路时,采用三种不同方式切断短路电流的利弊;说明了高压厂用变压器分支开关采用FSR快速开关的优越性;扼要介绍了FSR快速开关的实际应用。

Selection and Application of Auxiliary Branch Breaker

It is always one of the puzzling problems that which way to cut off short-circuit current in power system when takes place short-circuit in high voltage side of auxiliary transformer in large generator unit.Selection of auxiliary branch breaker is stated from point of view of security,reliability and economics.Principles and characteristics of large capacity rapid switch(FSR)are briefly introduced.The advantages and disadvantages of cutting off short-circuit current in three different ways are analyzed when takes place short-circuit in the cannula of high voltage side of auxiliary transformer.The superiority of using FRS rapid switch in auxiliary branch breaker is expounded.Also the application of FSR rapid switch is presented.