Test method for acquiring high-frequency response of cable
A high-frequency response and test method technology, applied in the measurement of electrical variables, dielectric strength, current/voltage measurement, etc., can solve the problems of difficulty in guaranteeing accuracy and reliability, lack of actual measurement, etc., and improve the reliability of field operation. properties, avoid refracted radiation and waveform distortion, and avoid the effect of being in an overvoltage environment
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[0030] Below in conjunction with embodiment the present invention is described in further detail:
[0031] A test method for obtaining the high-frequency response of the cable. A steep pulse signal with a steep rising edge is input at the head end of the cable. To avoid signal reflection, a matching device is connected at both ends of the cable, and the overvoltage is measured by a high-frequency voltage measuring device. For measurement, the response characteristics of the long-distance cable can be obtained by comparing the input and output signals; finally, based on the response characteristics of the long-distance cable test results, the ATP-EMTP cable line module is written to calculate the overvoltage of the high-voltage cable line and improve the accuracy of the model.
[0032] 1) Steep pulse source design
[0033] Based on the high-frequency power electronic switch to form a steep pulse source, the proposed high-voltage circuit design is as follows figure 1 Shown:
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