Method of measuring secondary cable transfer impedance caused by ground net impact current
A technology of inrush current and secondary cables, which is applied in the high voltage field, can solve the problems of high experimental cost, limited output capacity, output waveform distortion, etc., and achieve the effect of saving safety measures, reducing experimental cost, and experimental safety
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[0034] The method for measuring the transfer impedance of the secondary cable caused by the inrush current of the grounding grid of the present invention includes the following steps:
[0035] (1) Take the actual measurement of a substation as an example, such as figure 1 As shown, two points in the middle of a grounding grid with a side length of 100m in a substation are selected as the grounding points of the impulse voltage generator 1. One grounding point is the current inflow point, and the other grounding point is the current outflow point. Use EMCpro's impulse voltage generator 1;
[0036] (2) Connect the impulse voltage generator 1 to the grounding grid of the substation through the two grounding points selected in step (1);
[0037] (3) Find the midpoint of the connection between the two grounding points of the impulse voltage generator 1;
[0038] (4) On the line connecting the two grounding points of impulse voltage generator 1, find an 80m-long line segment with the midpoi...
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