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Research on SF6 Ingredient Monitoring System in the High Voltage Transmision and Transformation Equipment

Author: TanWeiJun
Tutor: DingWanShan
School: Nanjing University of Aeronautics and Astronautics
Course: Measuring Technology and Instruments
Keywords: infrared sensor SF6 S3C44B0 uC/OS-II CC1100
CLC: TM726.1
Type: Master's thesis
Year: 2011
Downloads: 112
Quote: 1
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Abstract


The number of high voltage transmission and transformation equipment with SF6 gas has increased a lot following the rapid development of the electrical power industry; therefore, it is more important to monitor ingredients of SF6. SF6 gas has excellent insulation and suppressing arc performance, and could generate a variety of impure gas （H2O, SO2, H2S, and HF etc.） through resolving under the action of arc and corona, then corrupts electrical equipment to impact its insulation which may produce a serious consequence. It is necessary to build a system to monitor ingredients of SF6 within high voltage transmission and distribution equipment which make it an attention and significant study to scholars.The present study discusses the significance of detection of SF6 ingredients within electrical equipment, and makes a comparison among several principles used to measure SF6 ingredients. According to their characteristics, we select a measurement adapted to this system and propose an entire design scheme correlated to detection system of SF6 ingredients.This system develops an ARM central processing platform hardware involving ADC conversion module, LCD module, wireless communication module and keyboard module, which has a 32-bit processer S3C44B0 at the core; Accomplish the production and debug of PCB; Achieve the transplantation of operating system uC/OS-II and code applications in the ARM embedded and integrated platform ADS1.2; Code the remote monitoring software in the VC Environment; Debug the whole system based on the hardware circuit; Finally, calibrate and test the gas-concentration in the laboratory. This system is characteristic by high intelligence, stable performance, simple manipulation, more compacted, low power consumption, and strong anti-interference.Compared with the traditional sensors, the gas sensor based on infrared spectrum absorption technology designed in the present study is characterized by rapid respond speed, long service life and good adapting in the adverse circumstance. Adopt ARM embedded processor supplemented by the embedded operating system, the present system has advantages of good real-time performance, offline operation and portability, and has a good prospect in application market.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Transmission and distribution technology > Transmission and distribution lines > High Voltage Transmission Line
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