800kv extra-high voltage direct-current non-contact multichannel distance measurement type electroscope

Abstract

The invention provides a 800kV extra-high voltage direct-current non-contact multichannel distance measurement type electroscope comprising a signal amplification module, a signal processing module, an alarming module, an analog-to-digital conversion and data processing module and an LCD (liquid crystal display) display module, wherein the signal processing module comprises a rectification module, a filtering module, a signal acquisition module, a comparing control module and a distance measurement module, and the signal acquisition module comprises a stator and a rotor. The electricity testing value of the electroscope is the electric field value of the on-site working position, which effectively broadens the use range of the electroscope and improves the accuracy of the electroscope. The electroscope tests electricity by taking a distance value of a working position and a lead to be detected and a field intensity value correspondingly obtained according to the field intensity curve and the variation trend of a space electric field as alarming threshold values, and whether the lead to be detected is charged or not is reflected according to acoustic and light signals of alarming, thereby effectively eliminating the interference of adjacent charged equipment and solving the problems that the repeatability of an electricity testing result is poor and the accuracy is low because of the interference of the charged body of adjacent equipment to be detected on the space field intensity.

Description

technical field [0001] The invention belongs to safety tools for ultra-high voltage direct current transmission and transformation equipment, in particular to an 800kV ultra-high voltage direct current non-contact multi-channel distance-measuring electroscope. Background technique [0002] Operation and maintenance work is an important means to grasp the operation status of power grid equipment, discover and deal with equipment defects in time. The "State Grid Corporation Electricity Safety Work Regulations (Power Line Part)" clearly stipulates that before working on some electrical equipment that is powered off or installing grounding wires in the working section of a power outage line, an electrical test must be performed to verify that the equipment or lines are indeed without voltage. The electroscope is one of the common tools used to detect whether there is voltage on the electric equipment. Through the electroscope, it can be clearly verified whether there is no volta...

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Problems solved by technology

[0003] In the Chinese patent 200910060796.9 "1000kv UHV AC non-contact electric inspection method and its electroscope", the electric inspection reference value is obtained by the data processing module at a certain frequency to collect data from the electric field strength of this working position, and the alarm threshold is obtained by multiple on-site The test is reasonably selected according to the changing trend of the electric field. Since there are many live equipment in the substation and the converter station, the interference between the live equipment is relatively large, resulting in complex and changeable synthetic field strength around the live equipment. Large interference, so the acquisition of the reference value and alarm threshold in this patent is susceptible to external interference, and the accuracy is not high

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