基于無線通信技術(shù)的XLPE電纜局部放電在線監(jiān)測系統(tǒng)的研究
[Abstract]:With the continuous expansion of city scale and the application of power cable in power system, the reliability of power supply has been paid more and more attention by power supply departments and users. The existing power cable lines are maintained through regular maintenance and post-accident detection, which increases the duration of cable faults, consumes a lot of manpower to find fault points, and reduces the efficiency of cable maintenance. This paper presents a real-time fault monitoring method based on wireless communication technology, which can effectively improve the processing speed of cable faults. In this paper, the on-line monitoring method of partial discharge of high voltage cable is studied systematically, and a set of on-line monitoring system for cable is designed. Firstly, the partial discharge model of power cable is established, and the UHF signal is extracted from the joint to monitor the operation of the cable. On this basis, a wireless transmission system for UHF signal detection and processing is designed, which realizes the timely and effective transmission of fault signal and introduces the propagation characteristics of UHF signal in cable line. Secondly, the hardware modularization is designed for the system, which makes the whole structure clear and clear, mainly including: data acquisition circuit, main control circuit, GPRS module circuit, power circuit. In the process of data transmission, the scheme of underground wire transmission and ground wireless transmission is adopted, which solves the problem of wireless signal transmission in underground. Finally, this paper analyzes the characteristics of the voltage when the cable is defective, and introduces the basic method of cable defect identification. In addition, after debugging the hardware and software of the system, the effectiveness of the system is verified.
【學(xué)位授予單位】:西安理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TM855
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