大功率直流高压电源的变压器分布电容分析  

Analysis of the Stray Capacitances in the Transformer of the High-power and High-voltage DC Power Supply

作　　者：杨雷[1] 傅鹏[1] 刘小宁[1] 

机构地区：[1]中国科学院等离子体物理研究所,合肥230031

出　　处：《高电压技术》2009年第6期1403-1408,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2008GB104000)~~

摘　　要：高压大容量隔离变压器,原副边分布电容储能较大。对于速调管和中性束加速极负载,负载打火时这些能量的注入可能导致它们的损坏。在电源设计阶段需要对变压器分布电容进行分析,并尽量减少它们的储能。为此通过对EAST装置中100kV/100A高压电源系统的两种变压器结构模式,采用绕组分段的方式计算绕组间的分布电容和分布电容电压,推导出变压器内部分布电容储能算式。计算结果表明:分布电容储能是一个与时间无关的量;不同变压器结构,储能差异较大。根据这些计算结果,高压电源的变压器结构采用油浸式隔离变压器串联干式变压器的模式,大大降低了变压器内部的分布电容储能。The stored energy of stray capacitances in high-voltage large capacity insulation transformer＇s windings can not be neglected. This energy will discharge to the load such as klystron or neutral beam injection accelerator, and destroy it when serious arc fault happens. In order to protect them, the energy should to be analyzed at the design stage. Consequently, two types of transformer structures of 100 kV/100 A high voltage power supply in experimental advanced superconducting tokamak（EAST）were introduced . To compute the stored energy in the stray capacitances of transformers, the transformer windings were divided into segments, then these stray capacitors and their voltage could be calculated. Thus the energy of each segment could be achieved. The results demonstrate that the energy is independent of time and different in the two transformer＇s structures. The transformer structure of oil insulation transformer in series with dry transformer was adopted in the high voltage power supply for reducing the energy that was stored in the stray capacitances of transformers.

关 键 词：PSM 高压电源 直流 变压器 分布电容 储能 

分 类 号：TM42[电气工程—电器]