TSC高压晶闸管阀过电流失效机理  

Study on the Failure Mechanism of TSC High Voltage Thyristor Valve Over-current

作　　者：贺之渊[1] 汤广福[1] 邓占锋[1] 郑健超[1] 

机构地区：[1]中国电力科学研究院,北京市100085

出　　处：《电力系统自动化》2007年第13期23-28,共6页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217907)~~

摘　　要：为满足晶闸管投切电容器(TSC)装置可靠性及其试验方法和试验等效机理研究的需要,重点研究了TSC装置的核心部件——高压晶闸管阀在过电流故障状态下的失效机理。首先介绍了TSC系统及其阀的结构以及过电流故障形成的原因和特征,并给出了过电流的数学方程和仿真波形。然后按照过电流故障的不同发展阶段对TSC阀的电流、电压和热等应力进行了解析分析。在上述基础上,结合器件的物理特性,对TSC阀各个元件在各种故障应力下的内部物理过程进行了分析。最终得到了TSC阀在过电流故障的不同发展阶段的失效模式和失效指标,从而揭示了TSC高压晶闸管阀的过电流失效机理。For studying the reliability,testing methods and the mechanism of thyristor switched capacitor （TSC）, the over-current failure of high voltage thyristor valve,which is the core component of TSC,is analyzed. Firstly,the configuration ofthe TSC and its thyristor valve is described;the over-current fault is examined;the waveform and its analysis representation are given.Then, based on the different development stages of TSC over-current fault,the voltage, current and thermal stresses on valve is expounded,the expression of each stress is inferred;the inner physical processes of the TSC valve under variable stresses are expounded.Finally, the failure modes and failure indexes of TSC valve on different over-current stages are obtained,thus the failure mechanism of TSC high voltage thyristor valve over-current is revealed.

关 键 词：晶闸管投切电容器(TSC) 可靠性 高压晶闸管阀 过电流 失效机理 

分 类 号：TM761[电气工程—电力系统及自动化]