Lightning arrester discharging current monitoring system and method

A discharge current, monitoring system technology, applied in the direction of measuring current/voltage, instruments, measuring devices, etc., can solve problems such as circuit damage, and achieve the effect of improving reliability and reducing acquisition costs

Inactive Publication Date: 2016-11-02
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the arrester side of this system is a passive system, which overcomes the problem of easy damage to the circuit caused by the rise of the ground potential

Method used

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  • Lightning arrester discharging current monitoring system and method
  • Lightning arrester discharging current monitoring system and method

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] Such as figure 1 and figure 2 As shown, the present invention discloses a lightning arrester discharge current monitoring system, including an air-core coil 1, a passive integrator 2, an integrated electro-optic modulator 3, a light source 4, a first optical fiber 5, a second optical fiber 6, a photodetector 7, Collection device 8 , upper electrode 9 , lower electrode 10 , optical waveguide channel 11 , lithium niobate crystal 12 .

[0047] The air-core coil 1 is used for non-contact current measurement and is placed outside the grounding lead. In order to ensure the consistency of the measurement of the air-core coil 1, it is made of a printed circuit board, which avoids the measurement dispersion caused by the uneven winding quality of the wire-wound air-core coil. The air-core coil 1 converts the arrester discharge current signal into a proportionally red...

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PUM

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Abstract

The invention provides a lightning arrester discharging current monitoring system and method. The system comprises a hollow wire coil, a passive integrator, an integrated electro-optical modulator, a light source, a first optical fiber, a second optical fiber, an optical detector and a collecting device, wherein the hollow wire coil and the passive integrator are used for subjecting lightning arrester discharging currents to passive measurement, the integrated electro-optical modulator is used for converting detected electric signals into optical signals, and the optical detector and the collecting device in a control room end are used for converting received optical signals into electric signals and recording the electric signals. A problem that electricity supply of a lightning arrester end can be easily affected by circuit damaged caused by ground potential rise is solved, a problem that signal transmission is susceptible to interference is solved, and the lightning arrester end can be safely and effectively insulated from a control room.

Description

technical field [0001] The invention relates to the technical field of high-voltage equipment performance detection, in particular to a discharge current monitoring system and method for an arrester. Background technique [0002] Lightning tripping is the main cause of tripping faults in high voltage transmission systems. As an important device in the power system, the arrester can effectively protect the power equipment. When the protected equipment is running under the normal working voltage, the arrester will not work, and it will be regarded as an open circuit to the ground. Once there is an impulse voltage that endangers the protected equipment, the arrester will act immediately to guide the high-voltage impulse current to the ground, limit the voltage amplitude, and protect the insulation of electrical equipment, thereby effectively limiting the damage of lightning overvoltage to electrical equipment. a wide range of applications. The discharge current flowing throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 岳一石黄福勇周卫华王成王峰龚政雄王海跃彭波
Owner STATE GRID CORP OF CHINA
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