摘要
为解决依靠例行和诊断性试验来评估变压器套管的绝缘状态,难以及时发现运行中套管的潜在故障和现有的套管局部放电测量通过末屏引出信号安全性差,且易受干扰的问题,提出了基于特高频信号的套管局部放电带电检测与时间差定位方法。阐明了特高频定位方法的基本原理,并进行了仿真计算及套管实体缺陷模型局放特性比对与定位,且通过现场对在运变压器套管进行测试,结果表明,该方法可以辨识出套管局部放电缺陷类型及放电部位。
In order to solve the problems in the evaluation of insulation condition of transformer bushing through routine and diagnostic test,including the difficulty in discovering the hidden fault in the running bushing in time and the poor security of bushing partial discharge measurement of which the signal is educed through end screen,this paper proposed the bushing partial discharge live detection and location by difference of times based on UHF,expounded the basic principle of UHF location,simulated and calculated the method,and compared the located the partial discharge of bushing defect model. The test of the running transformer bushing shows that this method is able to identify the type and location of bushing partial discharge.
出处
《黑龙江电力》
CAS
2016年第2期141-144,149,共5页
Heilongjiang Electric Power
