Authors: Xiangjun Zeng; Guangming Jin; Yuanyuan Wang; Xiaoxi Hu
Addresses: Hunan Province Key Laboratory of Smart Grids Operation and Control, School of Electrical and Information Engineering, Changsha University of Science and Technology, Room 508, Engineering Building 1, 960, 2nd Section, Wangjiali South RD., Changsha, 410004, Hunan, China. ' Faculty of Electrical Engineering, Wuhan Electric Power Technical College, Room 301, Building 6, Wuhan, 430072, Hubei, China. ' School of Electrical and Information Engineering, Changsha University of Science and Technology, Room 402, Building 1, Changsha, 41076, Hunan, China. ' School of Electrical and Information Engineering, Changsha University of Science and Technology, Room 402, Building 1, Changsha, 41076, Hunan, China
Abstract: The theft rate of street lamp cable is very high in China, the monitoring/tracking systems are thus being deployed with an increasing popularity. These systems have some limitations such as high cost, high false-alarm rate, and easy to be disabled. In order to solve these problems, a novel anti-theft monitoring system based on measuring the parallel resonant frequency is presented in this paper. The model and equivalent circuit for street lamp is presented to calculate the resonant frequency. The measured frequency and the measured number of street lamp are then calculated to distinguish whether the cable of street lamp is stolen or not, and to locate the stolen cable point. The scheme has been verified by EMTP simulation, and a fault detection prototype has been developed and tested in the laboratory. The results show that the proposed method can detect reliably if the cable of street lamp is stolen, and can locate accurately where the theft occurred.
Keywords: anti-theft monitoring; street lamps; high voltage sodium lamps; theft location; resonance measurement; street lamp cables; China; parallel resonant frequency; fault detection; stolen cables; metal theft; copper theft; scrap metal.
International Journal of Advanced Mechatronic Systems, 2012 Vol.4 No.1, pp.11 - 17
Published online: 30 Aug 2014 *Full-text access for editors Access for subscribers Purchase this article Comment on this article