CDT Communication Protocol Realization based on STM32

Abstract

In industry 4.0 society, the development of smart grid requires to realize the conversion of substation equipments from CDT protocol to LEC61850 protocol. CDT (Cyclic Digital Transmission) protocol provides the function, the frame structure, the information word structure and transfer rules in the grid data collection and monitoring system. In this paper, the CDT protocol that uses STM32 as the master chip is developed, in order to realize a high degree of automation in the grid scheduling and a stable and reliable communication. Some technologies and functions of 5TM32 such as DMA, USART, Timer, and so on are applied into the design. The results show that CDT protocol can be applied in the communication between 5TM32 and peripheral, and using the conversion board to implement the link of CDT and IEC61850 is feasible.