本文讨论了小波变换及小波变换的奇异性检测理论，并将其应用于暂态行波故障特征的分析。
The paper discuss the singularity detection theory of wavelet transform, this theory is applied to analysis of fault characteristics of the transient traveling waves.
当电力电缆发生故障后，会由故障点向所电缆的两端发射暂态行波，这个暂态行波包含着丰富的故障信息。
When the faults happened, the transient traveling wave contained abundant information is emitted to the ends of cables by the faults.
将基于暂态行波的接地选线技术应用于现场，实现了基于电流行波的配电系统故障选线装置SL-11，并在现场对装置进行了多次试验。
The grounding line selector SL-11 has passed field tests of single-phase-grounding line selection in non-solidly grounding system, which is based on current transient traveling wave.
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