Study of line protection measurement and control device based on TMS320F2812

A line protection device which integrates functions of protection, measurement, control, communication and faults memory based on 32 bit DSP TMS320L2812 is designed in this paper. The main function of this system is introduced. The hardware structure, data acquisition unit circuit and protection algorithm are offered. In allusion to fieldbus communication of the device, the object model is established and the data trigger mode is defined. This device meets the middle and low voltage line protection. It also has simple hardware structure, high precision algorithm and stronger communication ability. (5 pages)