Partial discharge positioning device and method for ultra-long power distribution cable
A partial discharge and power distribution cable technology, which is applied in the direction of measuring devices, fault locations, and measuring electricity, can solve the problems of high-frequency partial discharge signal propagation attenuation, submersion, etc., and achieve the effect of improving sensitivity and increasing the upper limit of length
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[0029] A partial discharge location device for super-long power distribution cables, including a pulse signal generator, an oscillatory wave voltage generator and a signal receiving device arranged at the head end of the cable, and several capacitive sensors arranged on spaced cable joints; The sensor includes a coupling unit, a signal acquisition module and a 4G module. The coupling unit is composed of a high-voltage coupling capacitor and an RLC coupling circuit. The signal collected by the signal acquisition module is transmitted to the signal receiving device through the 4G module. The sampling rate of the signal acquisition module is greater than or equal to 100MHz. The above-mentioned high-voltage coupling capacitor is pre-embedded between the grounding copper network of the cable joint and the outer semi-conductive layer, and its external wiring is connected in series with the RLC coupling circuit.
[0030] Both the head end and the end of the distribution cable of the p...
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