Transient ground electric wave sensor with excellent sensitivity

Abstract

The invention discloses a transient ground electric wave sensor with excellent sensitivity. The sensor includes a shielding shell, a BNC connector, an insulating medium, a first-stage voltage dividingcapacitor, a second-stage voltage dividing capacitor, a matching resistor and a signal cable, the first-stage voltage dividing capacitor is arranged on the inner bottom surface of the shielding shell, the insulating medium is arranged between the first-stage voltage dividing capacitor and the bottom face of the shielding shell, the first-stage voltage dividing capacitor is connected with one endof the second-stage voltage dividing capacitor through a wire, the other end of the second-stage voltage dividing capacitor is connected with the input end of the BNC connector through a signal cable,one end of the second-stage voltage dividing capacitor is connected with one end of the matching resistor, and the other end of the second-stage voltage dividing capacitor is connected with the otherend of the matching resistor. The size of the first-stage voltage dividing capacitor and the size of the second-stage voltage dividing capacitor are convenient to adjust, the optimal sensitivity, andthe ideal resonance frequency point and bandwidth are achieved by adjusting the magnitude of the second-stage voltage dividing capacitance value.

Description

technical field [0001] The invention relates to a transient ground wave sensor, in particular to a transient ground wave sensor with excellent sensitivity. Background technique [0002] The phenomenon of partial discharge mainly refers to high-voltage electrical equipment. The electrical equipment insulation discharge occurs in a local area under the action of a sufficiently strong electric field. This kind of discharge is limited to only causing a local short circuit of the insulation between the conductors without forming a conductive path. Each partial discharge will have some impact on the insulating medium. Slight partial discharge has little effect on the insulation of power equipment, and the insulation strength will drop slowly; while strong partial discharge will make the insulation strength drop quickly. This is an important factor that damages the insulation of high-voltage power equipment. Therefore, when designing the insulation of high-voltage power equipmen...

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Problems solved by technology

[0005] The present invention solves the common problem of poor sensitivity and low resonance frequency point in the current transient ground wave sensor commonly used in the market in the prior art, and provides a transient ground wave sensor with excellent sensitivity. The size of the first-stage voltage divider capacitor value, the second-stage voltage divider capacitor value and the matching resistance value ensure the best sensitivity, ideal resonant frequency point and bandwidth of the transient ground wave sensor

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