1000kv extra-high voltage ac non-contact type electricity checking method and apparatus

A UHV AC, non-contact technology, applied in the direction of instruments, measuring electric variables, electrostatic field measurement, etc., can solve problems such as there are no similar products, achieve the elimination of interference, solve the problem of poor repeatability, and meet the safety protection of engineering operations required effect

Active Publication Date: 2009-07-22
STATE GRID ELECTRIC POWER RES INST
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  • Abstract
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  • 1000kv extra-high voltage ac non-contact type electricity checking method and apparatus
  • 1000kv extra-high voltage ac non-contact type electricity checking method and apparatus
  • 1000kv extra-high voltage ac non-contact type electricity checking method and apparatus

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[0022] specific implementation plan

[0023] The 1000kV UHV AC non-contact electrometry method and its electroscope of the present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0024] figure 1 Middle mark description: 1—signal acquisition module, 2—signal amplification module, 3—signal processing module, 4—analog-to-digital conversion and data processing module, 5—alarm module, 6—self-inspection signal.

[0025] image 3 Marks in: 7-differential input stage, 8-voltage amplification stage, 9-output stage, 10-bias circuit.

[0026] Figure 6 Instructions for middle marks: 11—self-inspection, 12—pre-inspection, 13—detection, 14—comparison, 15—sound and light alarm, 16—power on, 17—no power, 18—cycle detection.

[0027] figure 1 It is a block diagram of the hardware system of the embodiment of the present invention. The 1000kV UHV AC non-contact electroscope provided by the present invention consists of a signal acq...

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Abstract

The invention provides a 1000kV ultrahigh voltage alternating current non-contact-type electroscopy and an electroscope thereof, the hardware part of the electroscope consists of a signal acquisition module, a signal amplification module, a signal processing module, an analog-to-digital conversion and data processing module and an alarm module, the software part thereof is divided into five stages comprising self-check, pre-check, checkup, comparison and alarm; after the self-check is passed and time delay of 3 seconds elapses, a value, which is obtained by performing a data acquisition in 10KHz frequency on the electric field intensity of the working location, is regarded as a reference value for the electroscopy, the inventive reference value is an electric field value of the on-site working location, which effectively enhances the use range and accuracy of the electroscope; the invention implements the electroscopy in terms of field intensity curves of space electric fields and gives a reflection of the size of the electric field via the frequency velocity of acoustic, optical signals for the alarm, which effectually eradicates the interferences from adjacent charged equipment and settles the difficult problem of inferior repetitiveness and low accuracy of the electroscopy result which is resulted from the interference with the space field intensity by charged bodies of the adjacent measured equipment.

Description

technical field [0001] The invention belongs to safety tools for 1000kV ultra-high voltage AC power transmission and transformation equipment, and in particular relates to a 1000kV ultra-high voltage AC non-contact electrometry method and an 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 voltage on...

Claims

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Application Information

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IPC IPC(8): G01R19/155G01R29/14
Inventor 邵瑰玮易辉张丽华纪建明杜建忠
Owner STATE GRID ELECTRIC POWER RES INST
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