Shielding suit complete-set device for measuring step voltage and contact voltage and measuring method

Abstract

The invention relates to a shielding suit complete-set device for measuring step voltage and contact voltage. The shielding suit complete-set device comprises a shielding suit; the shielding suit includes a right foot insulating boot part, a left foot insulating boot part and a glove part; an inter-electrode voltage measuring module (2) is fixed on the shielding suit; the inter-electrode voltage measuring module (2) is provided with three signal input ports and a signal output port; and the three signal input ports are a first signal input port, a second signal input port and a third signal input port. The device can be applied to the step voltage and contact voltage signal measurement in power system ground grid comprehensive evaluation and measurement. The device has high integration degree, can accurately measure all step voltage and contact voltage in a grounding power grid region under a grounding power grid comprehensive evaluation test condition or direct current ground loop grounding operation mode.

Description

technical field [0001] The invention relates to the field of electric system voltage signal measurement, in particular to a test device in the field of ground network comprehensive evaluation and measurement. Background technique [0002] At present, the measurement of the step voltage and contact voltage of the grounding grid in the power system generally requires at least two people to complete the measurement. One of them holds the voltage measuring device, and the other cooperates with the person stepping on two metal discs as voltage poles. Pick up the metal disk to measure the next point. If you need to record the test data, you need additional configuration personnel. However, in the comprehensive evaluation of the grounding grid of a large substation, there are only hundreds of measurement points for step voltage and touch voltage. The measurement process requires It consumes more human resources and time, and the operation process is not convenient enough. In addit...

AI Technical Summary

Problems solved by technology

[0002] At present, the measurement of the step voltage and contact voltage of the grounding grid in the power system generally requires at least two people to complete the measurement. One of them holds the voltage measuring device, and the other cooperates with the person stepping on two metal discs as voltage poles. Pick up the metal disk to measure the next point. If you need to record the test data, you need additional configuration personnel. However, in the comprehensive evaluation of the grounding grid of a large substation, there are only hundreds of measurement points for step voltage and touch voltage. The measurement process requires It consumes more human resources and time, and the operation process is not convenient enough

In addition, most of the current power system measures the step voltage and touch voltage of the grounding grid only when the equipment is not put into operation through a small test transformer at low voltage and low current, and then converted to the step voltage and high current under high voltage and high current. Touch voltage, this test is generally not carried out after the equipment is put into operation, but with the successive commissioning of UHVDC power transmission and transformation projects, for example, the measurement of step voltage and touch voltage under single pole operation mode will occur during operation It is also required to carry out, and under such high voltage and high current conditions, it is possible that the value of step voltage and touch voltage will exceed the design value, and the measurement has certain risks. The existing measurement methods have not done this potential danger take precautions

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