路灯电缆防盗检测和定位新方法

提出了一种路灯电缆防盗新方法.将一个可调电抗器和一个定值电阻串联接入路灯变压器的中性点与三相输出母线之间,经可调电抗器注入一个变频恒流信号,寻找单相路灯电路的谐振频率.根据谐振频率的大小计算线路上连接的路灯数量,判断线路是否完整,并通过计算找出电缆被盗点.该方法无需在线路末端增加设备,不受变压器型号和线路长度的影响,解决了路灯系统关灯期间断线报警的问题.仿真和实验结果验证了该方法的可行性.

A Novel Anti-theft and Location Method of Street Lamp Power Cables

A novel anti-theft method of street lamp power cables based on capacitance current resonance measurement principle is presented.An adjusted reactance and a resistance are in series connection with three-phase buses and transformer neutral point.Current signals varying with frequency are injected to the street lamp power system,and then the resonance frequency is sought.The equivalent capacitance and the lamp number are calculated.Whether the cable is stolen or not can be judged,and the fault point is also l...