Anti Theft and Monitoring System of Street Lamp Power Cables

A novel anti-theft and monitoring method of street lamp power cables is presented in the paper. The method is based on capacitance current resonance measurement principle. A current signal with frequency varying is injected to the street lamp power system, then the resonance frequency can be found The equivalent capacitance and the length of the cable can be calculated. Whether the cable is stolen or not can be judged, and the fault location can be calculated. The novel method is no necessary to add equipment to the end of street lamp power cables, and it´s not influenced by power transformer types and the cable length. Simulation experimentations are carried out. Simulation results show that the method is simple and correct.