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Monitoring the Pressure, Temperature and Content of Micro-water of SF6 Gas and Remote Querying

Author: WeiLin
Tutor: WangZhangQi
School: Huazhong University of Science and Technology
Course: High Voltage and Insulation Technology
Keywords: Online monitoring Gas pressure Gas temperature Of water content
CLC: TP274.5
Type: Master's thesis
Year: 2006
Downloads: 84
Quote: 1
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Abstract


State monitoring of SF6 gas is mainly reflected in two aspects : leakage and micro water content . The traditional leakage monitoring using a gauge or density relays, are not completely compensate for the effects of temperature on the pressure , and the accuracy and reliability is not satisfactory ; complex process and equipment monitoring of moisture content , the comparative Poor measurement results You can not objectively reflect the moisture content . The papers carefully elaborated the theoretical basis of the digital solution and the solution process : the use of SF6 gas equation of state , the input of the temperature and pressure of the gas , the figures for solving the density of the gas , and then use to solve the density value , solving translated to 200c when the air pressure . Thus completely compensate for the effects of temperature on the pressure , so that the gas leak judgment becomes accurate and intuitive . Papers before the launch of moisture monitoring methods , the moisture content of SF6 gas in existing national and industry control standards were discussed, questioned the standard proposed for reference moisture control standards . Paper, a new moisture content monitoring method the relative humidity of the gas measurement parameters , consider the gas pressure and temperature on the moisture content in ppm values ??, normalized approach Elimination of temperature on the moisture content value , using the absolute water pressure to objectively reflect the absolute increase in the amount of water vapor in the gas . The focus of this article is the design and the development of a centralized online monitoring of SF6 gas analyzer , the device has the following characteristics : monitoring functions , the instrument can be monitored by the sensor of humidity , temperature , pressure , digital solving SF6 gas density , thus determine whether there is leakage phenomenon . More comprehensive fault diagnosis , a three-dimensional diagnostic mode , the upcoming device status monitoring data with the norms and fixed detection test data , compared with historical data of longitudinal horizontal comparison with other equipment operating characteristics of the same model , in order to achieve the diagnosis results more accurately target . Design and Development of the device hardware 80C196KC core software architecture uses a modular design . Display the amount of monitoring , not only by the SCM and PC live show by the Inter net remote query , and achieved good results in the laboratory simulation tests .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Automatic detection system using a variety of new technologies
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