Method for publishing service subscription relationship of intelligent substation based on LLDP

Abstract

The invention provides a method for publishing a service subscription relationship of an intelligent substation based on LLDP. The method comprises the following steps: any switch in the process layernetwork receives IED equipment data subscription relationship information issued by the network management system, combines the accessed IED terminal equipment information dynamically learned by theswitch with the inter-switch connection information obtained according to the LLDP connection relationship; and the switch dynamically generates a multicast forwarding table and publishes the multicast subscription relationship through the LLDP extension protocol type, and other switches on the network dynamically learn the multicast subscription relationship through the LLDP and guide the processlayer network data flow to forward according to the learned multicast table. According to the method, the service subscription relationship of the intelligent substation can be quickly and automatically published, the efficiency of engineering debugging construction can be effectively improved, potential safety hazards caused by wiring and configuration errors are eliminated, and safe operation of a power system is guaranteed.

Description

technical field [0001] The invention relates to automatic control of electric power systems, in particular to a method for issuing service subscription relationships of intelligent substations. Background technique [0002] A smart substation is a modern substation that is constructed layered on the basis of the IEC61850 communication protocol by intelligent primary equipment and networked secondary equipment, and can realize information sharing and interoperability between intelligent equipment. Compared with conventional substations, only the interface and communication model of the equipment and network interfaces of the intelligent substation bay layer and station control layer have changed, but the process layer is composed of traditional current, voltage transformers, primary equipment, and primary equipment and secondary equipment. The cable connection between devices is changed to electronic transformer, intelligent primary equipment, merging unit, optical fiber conn...

AI Technical Summary

Problems solved by technology

In the process of engineering commissioning, implementation and operation and maintenance, the process-layer network subscription relationship is realized through static multicast or dynamic multicast protocol GMRP (GARP Multicast Registration Protocol). Static multicast requires a one-to-one correspondence between devices and switch port connections. The configuration workload of the broadcast switch is heavy, and it is also relatively error-prone

The dynamic multicast GMRP protocol depends on whether the substation IED (Intelligent Electronic Device, intelligent electronic device) equipment has the GMRP function. At present, most IED devices in China do not have the GMRP protocol function, and the subscription interaction relationship of IEC61850 cannot be realized through dynamic multicast.

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