Intelligent substation GOOSE network system based on EtherCAT

Abstract

The invention discloses an intelligent substation GOOSE network system based on EtherCAT. The system comprises an EtherCAT master station and EtherCAT slave stations, wherein the EtherCAT slave stations are all intelligent electronic equipment in the station, and comprise a combination unit, an intelligent terminal and a measuring and control device. The EtherCAT master station is special network communication equipment; each EtherCAT slave station is embedded with an ESC board card to simultaneously achieve network communication besides established functions of the intelligent electronic equipment. The network system provided by the invention has a reliable topological structure, each of the master and slave station equipments in the GOOSE network is generally provided with two Ethernet physical interfaces, the network adopts an annular topological structure which is higher in reliability than a start structure of the existing GOOSE network; the GOOSE network provided by the invention does not need a switch, is low in requirement on CPU performance, does not need a special physical layer port, and can save a lot of hardware resources in the network.

Description

technical field [0001] The invention relates to an EtherCAT-based intelligent substation GOOSE network body system, belonging to the technical field of intelligent substation network transmission. Background technique [0002] GOOSE (General Object-Oriented Substation Events) network is a network used to transmit important information such as tripping and closing commands, switch positions and device interlocking in the process layer of smart substations. Its reliability and real-time performance are important for the safe and stable operation of smart substations. significance. The existing GOOSE network is based on switched Ethernet technology and uses switches as the core of information exchange. The reliability and real-time performance of the network are limited by the number and performance of switches, and when a broadcast storm occurs on the switches, the real-time performance of the network will be greatly reduced. decline and may cause substation safety production...

AI Technical Summary

Problems solved by technology

[0003] 1. In terms of reliability, the existing GOOSE network mostly adopts a star structure, and the redundancy of network communication links can only be realized by increasing the number of switches in the network. The realization of this kind of redundant network structure requires a large number of switches , the cost is high, and because there is less data disseminated in the GOOSE network, the utilization rate of communication links in such redundant networks is very low. On the other hand, the redundancy of communication links will increase the data processing burden of intelligent electronic devices in the network , affecting the realization of its core control functions

[0004] 2. In terms of real-time performance, the IEC61850 protocol clearly stipulates the upper limit of the transmission delay of different types of data in the GOOSE network. Since the existing GOOSE network uses switches as the core, the data transmission delay increases with the number of switches and the number of devices in the network. Therefore, in order to ensure the real-time performance of the network, the scale of the existing GOOSE network is limited

On the other hand, multicast packets are mostly used in switched Ethernet. Once a broadcast storm occurs, the real-time performance of the network will be greatly reduced.

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