Research On GOOSE Communication And Simulation Based On IEC61850

The substation is a critical node in the power system. With the development of sensor technology, computer science and network, hard wiring for information exchange between substation equipment is gradually replaced by Ethernet connection. According to IEC61850, generic object oriented substation event(GOOSE) is an effective way to transfer key control information, as trip and locking, through broadcast. Therefore,implementation of GOOSE communication which could satisfy the need of real time and reliability were brought into sharp focus.This study is committed to the realization of GOOSE communication according to IEC61850 protocol and analysis of the factors that affect its real time performance based on OPNET. First of all, the application of IEC61850 protocol, GOOSE communication and the application of OPNET in power system are illustrated. Then, GOOSE communication are described in several aspects:the structure, mapping, retransmission mechanism, frame structure and coding. On the basis of GOOSE communication theory, GOOSE message sending and parsing program are developed on PC using WinpCap, which could act as GOOSE communication test platform afterwards.A GOOSE communication system based on ARM kernel embedded microprocessor STM32F407VG and physical layer chip DP83848VYB is presented. After analyzing the hardware requirements of GOOSE communication, the selection and architecture design of hardware are described. Based on the requirement of GOOSE communication, the initialization and configuration process are explained on the hardware platform. According to the GOOSE requirements of event trigger and retransmission mechanism, the software design of message sending part is presented. And the software design of message receiving part is presented based on frame structure and parameter definition of GOOSE message.Test platform is built to test the GOOSE communication system in several aspects: verifying the message retransmission mechanism, testing the acception and parsing of message and measuring the communication delay. Based on the results, real-time performance and reliability of the system are analyzed. The results show that the system can send event triggered GOOSE message in a correct frame. Besides, communication delay is short. And the system meets the requirements of the retransmission mechanism. The system can obtain gooses message from the network without loss and parse them and output corresponding signal. In summary, the GOOSE communication system could meet the real-time and reliability requirements of IEC61850 protocol.The simulation of process layer network to which GOOSE communication belongs is conducted. Based on network topology, communication nodes and data flow, the method of how to build the process layer communication is illustrated. Combined with the simulation results, the effect of priority tag, mapping method, and VLAN on message real-time performance are analyzed. It can be concluded that in the process layer network, the priority tag, mapping method and VLAN can significantly improve real-time performance of GOOSE communication, so as to ensure the reliable transmission of the information contained in the message.