traveling wave line

The traditional traveling-wave differential protection cannot be applied to ultra/ extra high voltage transmission line with shunt reactor, so this paper describes a novel differential current expression. Based on traveling-wave differential protection a new scheme with low proportional restraint characteristic is presented.

传统的行波差动保护无法应用于带并联电抗器特/超高压输电线路，为此给出了一种新的行波差流表达式，并据此提出一种具有轻微比例制动特性的行波差动保护实用方案。

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Secondly, a online cable fault location in single terminal for mine supply line is proposed based on wavelet transform muti-resolution analysis of transient traveling wave in partial mutation and weak variation signal processing is stated.

然后根据小波对局部突变信号或者微弱变化信号处理上的优势，利用小波变换对暂态行波进行多分辨率分析，从而提出了一种针对矿用供电线路的电缆故障的单端行波在线测距算法。

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With the earth as current loop, the zero-modal current is large in impedance, and the traveling wave runs slowly, so the line-modal current signal caused by the transmission line fault is processed with wavelet transform.

由于零模电流以大地为回路，其波阻抗大，并且行波波速比较慢，所以，文中对输电线路故障后的线模电流信号进行小波处理。

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Mathematic expression of temperature and rate of change of temperature to time at the point ( xO, yO, zO) at any time of laser rotating mirror scanning wideband temperature field is developed and "traveling-wave method of temperature wave line" is put forward.

提出了温度波线行波法，并推导出激光转镜扫描宽带温度场任意时刻点（x0，y0，z0）处的温度和温度对时间变化率的数学表达式。

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Traveling wave dispersion in the parallel line is more complex than that in the single line and is an important reason why the fault location error is large for traveling wave method.

行波色散是造成故障测距误差大的重要原因：利用行波故障定位时要考虑采用多相行波数据。

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