Development of Relay Protection Device Production on Line Control System Based on CPS

Abstract

Smart grid relay protection device is the key equipment to ensure the security and stability of power grid operation, and it is the basis to realize the secure and stable supply of energy and the sustainable, healthy development of national economy. At present, the production of relay protection device is discrete island mode which slows down the production process, the automation degree of device assembly and testing process is not high, the production process is opaque, which reduce the output of the product. This paper designs an automatic production line control system which is based on model of Cyber-Physical Systems (CPS), and meets the requirements of production process parameters, and realizes the automatic production of equipment assembly, testing, logistics etc. This system uses auto machines replacing human labor and designs logic timing control, and uses active Radio Frequency Identification (RFID) tags to track device and detect relevant status. In this line system, each process station adopts modular design idea and uses PLC for independent control and data acquisition. Furthermore, the system has been integrated and tested in conjunction with Manufacturing Execution System (MES), the dispatching system of Automated Guided Vehicle (AGV), device product testing system. The production line based on CPS model is of great significance for improving shop floor’s environment, saving labor costs, and improving the quality and production efficiency of relay protection products.