Acquisition unit for leak current of ultra high voltage direct-current arrester based on two Hall elements

A UHV DC, dual Hall element technology, applied in the direction of measuring current/voltage, instruments, measuring electrical variables, etc., can solve the problem of inability to stabilize and accurately detect leakage current of UHV DC arresters, and achieve a simple structure, strong self-contained Restorative and adaptive capabilities, practical effects

Active Publication Date: 2015-12-16
RED PHASE INC
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a collection unit dedicated to the leakage current of UHV DC arresters based on dual Hall elements, the main purpose of which is to overcome the defect that the existing leakage current alarm system cannot stably and accurately detect the leakage current of UHV DC arresters

Method used

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  • Acquisition unit for leak current of ultra high voltage direct-current arrester based on two Hall elements
  • Acquisition unit for leak current of ultra high voltage direct-current arrester based on two Hall elements
  • Acquisition unit for leak current of ultra high voltage direct-current arrester based on two Hall elements

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Embodiment 1

[0036] refer to figure 1 . An online detection system for the leakage current of a UHV DC arrester, comprising a detection device 1 arranged near the DC arrester, a data sending device for transmitting the detection result of the leakage current obtained by the detection device 1, a data receiving device, Central monitoring device and mobile terminal 3. The data sending device is a public network signal transmitting unit 5 , and the data receiving device is a public network signal receiving unit 6 . The public network signal transmitting unit 5 and the public network signal receiving unit 6 can realize data transmission through the mobile public network (GSM network or GPRS network). The transmitting unit 5 is preferably a communication module of a GSM network or a GPRS network. The central monitoring device includes a background processor 40 and a storage device 41, the input end of the background processor 40 is connected to the data receiving device, and the output end o...

Embodiment 2

[0060] refer to Figure 6 . This embodiment is substantially the same as the implementation of Embodiment 1, the difference is that: the data sending device includes a radio frequency signal transmitting unit 50, a frequency modulation forwarding unit 51 and a dual-mode communication unit 52 connected in sequence, and the data receiving The device is the public network signal receiving unit 6 connected to the output end of the dual-mode communication unit 52 .

[0061] Adopting the above settings can make this embodiment not only transmit the circuit detection value to the central monitoring device in the range covered by the public network, but also pass the radio frequency signal transmitting unit and the frequency modulation forwarding unit in the area where there is no public network signal. In cooperation, the lightning strike information is first sent to a dual-mode communication unit set within the coverage of the public network, and then transmitted to the central mon...

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PUM

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Abstract

The invention discloses an acquisition unit for leak current of an ultra high voltage direct-current arrester based on double Hall elements. The acquisition unit comprises a current sensor, a power amplifier and a circuit acquisition module, wherein the current sensor comprises an annular shell, a magnetic core arranged in a C shape and two Hall circuit modules; an accommodating space is formed inside the annular shell; a first coil winding and a second coil winding are respectively wound on the magnetic core, and the magnetic core is installed inside the accommodating space; and the magnetic flux density direction produced by the second coil winding is opposite to that of the first coil winding. The acquisition unit acquires the leak current of the arrester by adopting the two Hall circuit modules, so that the nonlinearity and the position error of the sensor can be greatly reduced, and the anti-interference capability and the range limit of the sensor are improved.

Description

technical field [0001] The invention relates to a state detection technology of an ultra-high voltage direct current line arrester, in particular to a collection unit dedicated to the leakage current of an ultra-high voltage direct current arrester based on dual Hall elements. Background technique [0002] With the rapid development of my country's economy, the demand for electricity is growing rapidly. However, my country has the natural characteristics that the distribution of power resources does not match the load center area. It is necessary to use long-distance and large-capacity transmission lines to improve the contradiction between power supply and demand. "West to East Power Transmission", Projects such as "North-South Mutual Supply" are the main deployment schemes at this stage, and UHV DC transmission technology is the specific implementation technical means. [0003] DC power transmission converts AC power into DC power through a converter, then sends it to the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 袁愿邓敏陈耀高林玉涵刘鸿渤吴章坤
Owner RED PHASE INC
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