Abstract:In view of the lack of precise localization and multi-technology complementary and low module indecency in the security system around the traditional substation,a solution is put forward,concluding precise positioning,multi-technology linkage,and bus system,and a new alarming and positioning fence is designed through the laser and ultrasonic ranging.The functions of intrusion detection,obstruction,alarm and so on are realized by network camera,electronic fence,voice alarm and GPRS.This improves the stability of the system and the independence of modules through the bus system.The maximum positioning error is 0.2 m,which can satisfy the requirements of security location.The overall plan is tested to be effective in the practical engineering.