Gaoya dianqi局部放电是开关柜发生绝缘故障的主要原因和前期阶段，准确有效地对局部放电产生的特征信号进行监测和分析是保障设备安全运行的关键。针对广泛运用的超声波和地电波检测法在实际检测过程中忽略的环境温湿度因素，本文设计制作了四种典型绝缘缺陷模型，在不同温湿度条件下测量局部放电信号并进行汇总分析，研究了环境温湿度对不同类型局部放电起始和熄灭电压以及超声波与地电波信号的影响特征。结果表明，温度升高针板缺陷超声波信号和悬浮缺陷地电波信号增强，40-60℃时针板缺陷熄灭电压与沿面、悬浮和气隙缺陷起始熄灭电压下降明显 ...
蔡乐辉 +5 more
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Dianci bileiqi, 2009 专利申请号:CN200510030426.2公开号:CN1948962申请日:2005.10.12公开日:2007.04.18申请人:华东电力试验研究院本发明公开了一种支柱瓷绝缘子的超声波探伤检测方法,包括:a)向被检工件的检测面发射SH波;b)使用横波耦合剂将探头与被检工件的待检测面耦合;c)用探头在待检测面上进行扫查;d ...
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