Research And Development Of The Relay Protection Device Based On DSP And μC/OS-Ⅱ

Whether the relay protection device can function steadily is very important to stability of the whole system. So the sensitivity, stability and celerity of relay protection call for more strict requests. Aiming at different kinds of faults and abnormity, we should install more advanced protection device. Using computer's powerful calculation, analysis and logic judgement to practise electric power system's protective relaying is a project which is paid attention to by many scholars and the goal of protective relaying development. Regarding middle-low pressure transmission lines in corporation as the object, the paper brings forward a kind of relay protection device based on DSP and embedded RTOSμC/OS-II.The hardware adopts DSP and MCU as double CPU configuration. It uses the DSP processor TMS320F2812 made in TI Company as control kernel to realize the protection, measure and communication function and uses the P89C668H SCM to complete the man-machine interface. The software design is based on the embedded RTOSμC/OS-II. The paper discuss the detail method of realizing TCP/IP stack on embedded system.The embedded computer system and Ethernet convenience the We can improve the efficiency of relay protective device by the Ethernet which based on TCP/IP protocols.The relay protection device mentioned in this paper is novel from the angle of collectivity scheme and design idea. The result indicates the scheme satisfies the basal request of protection.