Smart Grid Communication Simulation Study Based On Epochs

Smart Grid provides solutions to safety and stability operation of large scale power grids, new energy access and demand side management and has become the development trend of the future grid. Communication system as an important part of Smart Grid has gained wide attentions, and power system communication with mature IP Internet technology has demonstrated huge advantages. The second edition of IEC61850has been extended its application area outwards substations, which has greatly promoted the development process of Smart Grid’s communications system.This paper analyzes the communication needs of the wide-area protection system. Also, the advantages and disadvantages of three kinds of communication structures, distributed, centralized, and the regional centralized, is analyzed. IP-based regional centralized communication network architecture of wide-area protection is used and a dynamic routing strategy is used to solve the problem of wide-area protection communication disruption when part of communication links fail. The simulation model of a wide-area backup protection algorithm and its communication system is developed using electric power and communication synchronizing simulator (EPOCHS) platform, and the detailed design and implementation of three kinds of agent, regional decision-making agents,line decision-making agents and protection agents, is given. The feasibility of wide-area protection’s communications system and the effectiveness of the dynamic routing strategy are checked. The simulation results show that the IP-based wide-area communication system can meet the communication needs of wide-area backup protection and dynamic routing strategy makes wide area protection system work correctly even if part of the communication links fail.Based on analyzing the current communication system of distribution automation, smart distribution grid communication requirements and their traffic modeling are presented, and an IP-based smart distribution communication architecture is proposed. The simulation model of the smart distribution grid’s communication system is developed using EPOCHS, and the communication interaction procedure of a GOOSE based feeder automation algorithmic is studied by simulation. The results demonstrate the proposed communication architecture satisfy the communication needs of smart distribution grid.