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1·Tower surge impedance is an important parameter for lightning protection design, but its value is not well determined.

杆塔波阻抗是防雷设计中的一个重要参数，国内外对这一问题一直未能很好地解决。

2·According to the property that the surge impedance relay is realized by the ratio of voltage and current travelling waves, the relay's algorithm based on wavelets is present.

针对波阻抗方向继电器利用初始电压和电流行波的比值构成的特点，提出了基于小波变换的继电器算法。

3·The reflection and refraction of traveling wave are quite complicated at the sheath-crossing point of high voltage power cable, due to its remarkably noncontinuous surge impedance.

高压电缆的金属护套交叉互联导致行波在多个波阻抗不连续点产生了复杂的折反射行为，这对高压电缆线路的行波故障测距产生很大的影响。

4·The tailrace impedance surge chamber is going to be used on Longtan hydropower station.

龙滩水电站设置尾水阻抗式调压井。

5·The calculating method of section of the well and the effective impedance hole in the surge tank has been gived.

导出了差动式调压室大井面积和有效阻抗孔面积的计算方法。