A method of publishing smart substation service subscription relationship based on lldp

Abstract

The invention proposes a method for publishing smart substation service subscription relationship based on LLDP. The method includes the following steps: any switch in the process layer network receives the IED device data subscription relationship information issued by the network management system, and combines the information of the connected IED terminal equipment dynamically learned by the switch with the information obtained according to the LLDP connection relationship. Connection information between switches, the switch dynamically generates a multicast forwarding table, and publishes the multicast subscription relationship through the LLDP extension protocol type, other switches on the network dynamically learn the multicast subscription relationship through the LLDP protocol, and guide the process layer network data flow according to the learned multicast table forwarding. The method of the invention can quickly and automatically realize the release of the service subscription relationship of the intelligent substation, effectively improve the efficiency of engineering commissioning and construction, eliminate potential safety hazards caused by wiring and configuration errors, and ensure the safe operation of the power system.

Description

technical field [0001] The invention relates to automatic control of power systems, in particular to a method for publishing a service subscription relationship of an intelligent substation. Background technique [0002] Smart substation is a modern substation that is constructed by layers of intelligent primary equipment and networked secondary equipment on the basis of IEC61850 communication protocol, which can realize information sharing and interoperability between intelligent equipment. Compared with conventional substations, the equipment and network interfaces of the bay layer and station control layer of intelligent substations only change the interface and communication model, but the process layer is composed of traditional current, voltage transformers, primary equipment, primary equipment and secondary equipment. The cable connection between devices is changed to electronic transformers, intelligent primary equipment, merging units, optical fiber connections, etc...

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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