Design of Lower Computer System in Wireless Sensor Network for Monitoring of SF6 Moisture Content

Abstract:

Aiming at the problems currently exist in the wire communication used in the monitoring of SF6 moisture content parameters, such as complex wiring structure, fixed data collection points and easy occurrence of monitoring blind spots, ZigBee wireless communication technology is adopted according to the characteristics of soft sensing of SF6 moisture content, which applies to the implementation of design scheme of lower computer system for the SF6 moisture content multi-data collection wireless sensor network. At first, collection of relevant data information such as absolute humidity, temperature and pressure of SF6 gas is achieved utilizing a variety of wireless sensors; then flexible increase of sensors is achieved using ZigBee communication protocol and hardware modules. Simulation data show that: the maximum wireless transmission distance of the present design is 110 meters, and the minimum transmission distance 60 meters on condition of presence of obstacles, furthermore, the transmission bit error rate is low; the design also has small monitoring error for SF6 gas parameters, and a good reliability.

• Periodical: Applied Mechanics and Materials (Volumes 462-463)
• Pages: 39-44
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.462-463.39
• Online since: November 2013
• Authors: Hui Yang
• Keywords: Lower Computer, Moisture Content, SF6, Wireless Sensor

References

[1] Duan Zhi-qiang, Wang Bao-shi, Tang Xue-dong. Actualities and development trend of SF6 high voltage circuit breaker in our country [J]. Journal of Shenyang Institute of Engineering (Natural Science), 2011, Vol. 7 (1): 50-52.

[2] W. Mosch. High voltage insulation technology using sulfur hexafluoride gas [M]. China Machine Press, first edition, Beijing, (1984).

[3] Li Jian-ji. High voltage and ultrahigh voltage SF6 insulated switchgear [J]. High Voltage Electrical Equipment Communication, 2001, Vol. 20 (1): 13-18.

[4] Yang Jin-ying. Cause of Humidity Rising of Gas of SF6 Combined Electrical Apparatus And Its Prevention Measurement [J]. Fujian Electric Power and Electrical Engineering, 2000, Vo1. 20 (l): 63-64.

[5] Wang Yong-qiang. Research on the Moisture Existence Problem in SF6 Gas Insulated Metal Enclosed Switchgear [J]. Information on Electric Power, 2001, No. 2: 40-43.

[6] Li Wen-zhong, Duan Chao-yu. Introduction and practice of ZigBee wireless network technology, 2007, 5-6.

[7] Lu Zi-qiang. Monitoring, control and treatment of moisture in SF6 gas [J]. Qinghai Electric Power, 1996, No. 3: 22-25.

[8] Zhu Chang-ping, Jiang Fu-chun, He De-yu. Implementation of industry and mine automation based on CPLD data serial communication in ultrasound excessive SF6 gas alarming system, Industry and Mine Automation， 2005 (5): 26-27.

[9] Zhang Ning, Pan Zheng-rong, Zhao Lei. Research and implementation of on line monitoring system of moisture content in SF6 circuit breaker [J]. Electronic Measurement Technology, 2010, Vol. 33 (4): 109-112.

[10] Zhang Xiao-hua, Zhu Chang-ping, Dan Ming-lei, Wang Rui-hua, Liang Xing-jian. Simulation research on wide-range micro-concentration gas detection by ultrasonic. Technical Acoustics, 2008, 27 (1): 40-43.