a kind of sf 6 Gas leakage online monitoring and alarm system

An alarm system, gas leakage technology, applied in the direction of liquid tightness measurement using liquid/vacuum degree, measuring device, detecting the appearance of fluid at the leakage point, etc., can solve the problem of low accuracy and improve detection accuracy and performance Stable and avoid the effect of high cost

Active Publication Date: 2017-10-31
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD +2
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  • Application Information

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Problems solved by technology

Less accurate than the above measurement methods

Method used

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  • a kind of sf <sub>6</sub> Gas leakage online monitoring and alarm system

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Embodiment Construction

[0036] Such as figure 1 Shown, SF 6 The gas leakage online monitoring and alarm system is composed of the connection between the field end and the remote end through the RS485 bus; the field end includes,

[0037] Ultrasonic measurement module, installed in the SF 6 In the substation of electrical equipment, the ultrasonic velocity measurement method is used to measure the propagation speed of the ultrasonic wave through the ultrasonic sensor, and the SF is deduced in reverse. 6 Gas content, used to measure SF in air 6 Concentration of leakage gas, which is connected with ARM controller;

[0038] Infrared measurement module, installed in the SF 6 In the substation of electrical equipment, it measures the gas composition in the substation based on the principle of infrared absorption, and analyzes whether there is SF 6 Gas leaks for measuring SF in air 6 Concentration of leakage gas, which is connected with ARM controller;

[0039] Temperature measurement module, install...

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Abstract

The invention discloses an SF6 gas leakage on-line monitoring and alarming system. The SF6 gas leakage on-line monitoring and alarming system consists of a remote end and an on-site end which are connected through a data wire, wherein the on-site end comprises an ultrasonic measurement module, an infrared measurement module, an ARM controller, an RS485 communication module, a relay control module, an AC220-DC24 / 5V switching power supply and an AC220V wiring terminal; the remote end comprises a remote control module and a data analysis module. In the detection of the SF6 gas leakage on-line monitoring and alarming system, an infrared measurement principle and an ultrasonic measurement principle are reasonably combined; a detection process of the system comprises ultrasonic measurement first, and then if SF6 concentration is detected to exceed a standard, then infrared measurement is started, so that the problem that the expense is relatively high due to frequent measurement is solved, the ultrasonic measurement can be supplemented so as to improve the detection precision; therefore, the detection method makes full use of the advantages of the ultrasonic measurement and the infrared measurement, the defect that in the prior art, the SF6 concentration is measured by a single sensor is overcome, and the precision and flexibility of SF6 concentration detection are improved.

Description

technical field [0001] The invention relates to the technical field of alarm systems, in particular to a SF 6 Gas leakage online monitoring and alarm system. Background technique [0002] In recent years, sulfur hexafluoride (hereinafter referred to as SF 6 ) The application of electrical equipment is increasingly widespread. In actual use, each substation has installed SF in the GIS room (or switch room) 6 Gas alarm device in order to achieve SF 6 On-line real-time monitoring of gas leakage. [0003] Traditional SF 6 Leak detection methods mainly use soapy water leak detection, hand-held leak detectors, etc., which can be classified into qualitative leak detection and quantitative leak detection. Qualitative leak detection includes vacuum leak detection and leak detector qualitative leak detection; quantitative leak detection includes local bandaging method, hanging bottle method and buckle cover method, etc. These methods belong to off-line detection, and the high-v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/02G01M3/24G01N21/17G01N29/024
Inventor 张英王先培李巍李军卫田猛吴喜玉余鹏程赵宇蒋震代荡荡邓扬
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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