Master IED for Substation Analog GOOSE Transmission

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Solution Overview

Problem

Existing substation IEDs lack clear specifications for GOOSE communication of analog values, limiting high-level applications such as power management and load shedding, as not all vendors support analog values via GOOSE protocol.

Innovation Solution

A master-IED with a remote control interface and MMS client functionality that supports GOOSE publisher-subscriber communication, enabling the transmission of analog and binary values and calculation results as multicast signals for fast reaction across connected IEDs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If GOOSE protocol is used for fast transmission of substation events, then transmission speed is improved, but support for analog values is limited as not all vendors implement this capability

Engineering Contradiction:

Improvetransmission speedVSAvoidsupport for analog values

Core Design Contradiction:

SpeedVSAdaptability or versatility

Solution Approach 1:

The master-IED is designed with multi-functional communication capabilities, supporting both traditional MMS client functions and GOOSE publisher-subscriber functionality. This allows the device to operate in diverse communication modes and support various data types including analog values through GOOSE protocol, thereby resolving the limitation of vendor-specific analog value support while maintaining fast transmission speeds.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If MMS client functionality is used for vertical point-to-point communication, then data access reliability is improved, but communication speed is reduced compared to GOOSE multicast

Engineering Contradiction:

Improvedata access reliabilityVSAvoidcommunication speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The communication architecture is segmented into different functional layers: MMS client functionality handles reliable vertical communication with SCADA systems for data access and supervision, while GOOSE publisher-subscriber functionality handles fast horizontal communication for protection and control signals. This segmentation allows each protocol to operate in its optimal performance regime without compromising the other.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If all IEDs are combined in one sub-network for GOOSE communication, then communication simplicity is improved, but signal isolation and security are reduced

Engineering Contradiction:

Improvenetwork configuration simplicityVSAvoidsignal isolation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The master-IED acts as an intermediary device within the sub-network, implementing intelligent message routing and filtering. It can receive GOOSE messages from publishers and selectively forward them to specific subscriber IEDs based on configuration, thereby maintaining network simplicity while providing logical isolation and security for critical protection signals without requiring separate physical sub-networks.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2687925B1Master intelligent electronic device for high level application

Publication Date: 2018.10.17 ABB (SCHWEIZ) AG

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AI summary

The invention refers to a master-IED (Intelligent Electronic Device) for high level applications e.g. in power management or load shedding applications in power generation facilities or in electric power transformation, comprising at least one communication interface supporting MMS client and GOOSE functionality (CI-1, CI-2 ...CI-n), wherein each is designed as IED with its own configurable CID-file according IEC 61850 requirement. The master-IED specific IEC 61850 configuration tool can handle SCD (Substation Configuration Description)- files per communication interface CI-1.