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COMMUNICATION NETWORK SUPERVISION AND DIAGNOSIS BASED ON GOOSE AND SV MESSAGES

IP.com Disclosure Number: IPCOM000242193D
Publication Date: 2015-Jun-24
Document File: 6 page(s) / 47K

Publishing Venue

The IP.com Prior Art Database

Related People

Wolfgang Wimmer: INVENTOR [+2]

Abstract

The invention relates to the field of Substation Automation systems with a standardized configuration representation. More particularly, it relates to a method of diagnosing faulty configuration as well as failed parts inside a communication network based on IEC 61850 with GOOSE or SV messages. IEC 61850 services, especially the real time related services, are based on Ethernet. Real time messages like GOOSE and Sampled Value (SV) need managed Ethernet switches and are normally configured to restrict the multicast / VLAN traffic between those IEDs that really need it. Further, if a sender of such a message is reconfigured, also all receivers need to be reconfigured to be able to correctly interpret the changed message. As an IED’s application internally just sets the quality of incoming data to invalid if either no message arrives at all, or the configuration identification in the message does not match that with which the receiver is configured, the cause for a restricted or even blocked function is not easy to see. Therefore appropriate diagnosis facilities are needed mainly at commissioning, but they also have some value as permanent supervision during system operation e.g. to identify failed parts in the communication network or tempering with the Ethernet switch configuration. This invention shall be able to present if a GOOSE or SV message really arrives at a receiver, and if it arrives with the expected configuration. Additionally it can present if currently a simulated GOOSE is used as input message instead of a real one. This functionality alone can be provided by the LGOS and LSVS logical nodes as defined in IEC 61850-7-4 Edition 2 (2010). By overlaying these information for all senders and all receivers, an end – end supervision similar to EP1758301 can be implemented without any additional communication traffic for the supervision itself. If some GOOSE is not arriving at some end IED, however at some others, also the switches which might contain wrong VLAN or multicast filters can be identified. This extends the supervision of the physical network with a supervision of a logical network defined by VLANs or multicast addresses. In the following detailed description, the invention concerns following main aspects of: using a fixed number of LGOS/LSVS instances, diagnosing physical and logical network faults, and diagnosing PRP networks.

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1 COMMUNICATION NETWORK SUPERVISION AND DIAGNOSIS BASED ON GOOSE

AND SV MESSAGES


1.1 Background

The invention relates to the field of Substation Automation systems with a standardized configuration representation. More particularly, it relates to a method of diagnosing faulty configuration as well as failed parts inside a communication network based on IEC 61850 with GOOSE or SV messages.


1.2 Technical problem

IEC 61850 services, especially the real time related services, are based on Ethernet. Real time messages like GOOSE and Sampled Value (SV) need managed Ethernet switches and are normally configured to restrict the multicast / VLAN traffic between those IEDs that really need it. Further, if a sender of such a message is reconfigured, also all receivers need to be reconfigured to be able to correctly interpret the changed message.

As an IED's application internally just sets the quality of incoming data to invalid if either no message arrives at all, or the configuration identification in the message does not match that with which the receiver is configured, the cause for a restricted or even blocked function is not easy to see. Therefore appropriate diagnosis facilities are needed mainly at commissioning, but they also have some value as permanent supervision during system operation e.g. to identify failed parts in the communication network or tempering with the Ethernet switch configuration.

2 STATE OF THE ART

The Edition 1 of IEC 61850 missed features to distinguish between missing and wrongly configured messages. Therefore the Edition 2 introduces logical nodes LGOS for GOOSE supervision, and LSVS for Sampled Value stream supervision. Each instance of such logical node can be configured to supervise exactly one GOOSE or SV message source, and indicates then if messages are arriving at all, if they are correct or differently configured than expected, and if currently simulated messages are used by the receiving IED.

The introduction of these logical node functions allows to supervise a GOOSE or SV stream with standard IEC 61850 means, and allows to supervise pure GOOSE or SV senders by means of MMS/TCP based client server services if at least one of its receivers supplies MMS/TCP based services.

If such a static supervision is configured, then e.g. a system with 21 bays and 2 GOOSE messages per bay for control (e.g. interlocking, command reservation) going to each other bay controller would need 40 instances of LGOS at each bay controller.

We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden. 2015 ABB Switzerland

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