Research And Development Of Integrated Digital Relay

With the development of electronic industry and computer technology, presently relay protection has already entered the microcomputer protection era. There are advanced integrated digital relays now used to incorporate such functions as protecting, measuring, controlling, monitoring, communicating and displaying and so on into an organic whole. One single synthetic device can be adopted to realize all functions of the second elements during the second design of the electricity system. So it can be used as the fundamental elements of the integrated automatic system, and also can be used as the fundamental electric elements of the intellectual switching cabinet.This text has developed a kind of synthetic digital relay based on ARM7, on the basis of analyzing the domestic and international products and domestic demands and absorbing and perceiving their advantages. This text adopted AT91M40800 microprocessor of U.S.A. Atmel Company to design the whole hardware platform. At the same time in order to reduce the quantity of the separated component and bus, it adopted EPM3128A of Altera Company to realize all logic deciphers and disposing function in hardware circuit. Whereas the low consumption, small cubage, strong real-time character and high aggregation of the embedded system, it also transplanted an operating system uC/OS-II at this integrated digital relay.This integrated digital relay mainly realized the following function: instantaneous break-off protection, limit break-off protection , two type time-limit three-stage current protection, low-voltage protection etc; And Measurement function of all electric ponderance; The monitoring functions of positional signal , breaking-off signal of the control circuit; Display function of the first system picture, measuring data, real wave, event record, and etc.