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Experimental impulse response of grounding grids

机译：接地网的实验脉冲响应

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Experimental tests, consisting in the impression of low amplitude impulsive currents with lightning-patterned waveforms on a real grounding grid, were performed to assess the grid transient response. Simultaneous waves of current and grounding potential rise were measured considering the current impression on different positions along the grid electrodes (earth termination) to determine the impulsive grounding impedance. Currents with very short front-times were used to show strong propagation effects in the soil, responsible for values of grounding impedance always significantly larger than the measured low frequency resistance and strongly dependent on the position where current was impressed on the grid.
机译：为了评估电网瞬态响应，进行了一些实验测试，包括低振幅脉冲电流和雷电波形在真实接地网上的印象。考虑到沿网格电极（接地端子）不同位置的电流印记，测量了电流和接地电位上升的同时波，以确定脉冲接地阻抗。前置时间非常短的电流被用来显示在土壤中的强烈传播效应，其接地阻抗值始终明显大于测得的低频电阻，并且很大程度上取决于在电网上施加电流的位置。

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