Method and device for detecting strength of transient electric shock caused by object nearby power transmission corridor to human body

Abstract

The invention discloses a method and a device for detecting the strength of transient electric shock caused by an object nearby a power transmission corridor to a human body. The method comprises the following steps: pre-arranging a voltage acquisition device and a current acquisition device, enabling a tester pedaled on a metal plate to be in contact with the charged object nearby the power transmission corridor during detection, acquiring a human body surface potential at a human body skin position through a voltage signal within the sampling time T and acquiring all parts of transient current entering the human body via a contact point and various coupled distributed capacitors through the current acquisition device; then calculating heat generated within the sampling time T according to the human body surface potential and the various transient current flowing through the human body; the device comprises a human body contact metal part, the metal plate, a current collection lead, the voltage acquisition device, the current acquisition device and a signal acquisition device. The method and the device disclosed by the invention have the advantages that the difficulty that a distributed parameter system distributes acquired current can be overcome, the strength of the transient electric shock caused to the human body can be accurately and quantitatively evaluated, the detection is accurate and reliable, the reaction is sensitive, and the resolution ratio is high.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method and device for detecting the intensity of transient electric shocks to human bodies by objects near power transmission corridors. Background technique [0002] Overhead transmission lines will generate an electric field in the space around the high-voltage transmission corridor, and objects near the transmission corridor (especially objects with high conductivity) will accumulate charges under the action of the electric field to generate a higher potential, and the human body will come into contact with such objects When a high-potential object discharges to a human body with a lower potential, the electric charge accumulated by itself is released to the earth through the human body. This phenomenon in which a high-potential object discharges to a low-potential object is a transient electric shock. At the moment when a transient electric shock occurs, the potential o...

AI Technical Summary

Problems solved by technology

However, in the field of electronic technology, the objects of collecting signals are all concentrated parameter circuits, and the problem of transient electric shock to the human body is essentially a field problem, and the voltage and current of the human body in the electrostatic field are not limited to a certain port or a certain Branches, which brings great difficulties to the acquisition of electrical signals, especially current signals

[0005] To sum up, the disadvantage of the existing method is that the effective value of the voltage of the charged object after the transient electric shock can only be detected by a voltage detection device such as a multimeter, and the signal acquisition device cannot be effectively connected to the human body to capture the transient electric shock process, so that in the end it is impossible to accurately evaluate the intensity of transient electric shock

Images