Transformer Load Tap Changer control using IEC 61850 GOOSE messaging

Abstract

IEC 61850 General Overview IEC 61850 is a standard developed by the IEC's Technical Committee 57 (TC57). It specifies guidelines for communication between IEDs for the automation of substations. Although initially limited to the application within substations, it is being expanded to include substation-to-substation communication, substation-to-control center communication and communication systems for hydroelectric power plants, distributed energy resources, wind turbines and others. [2] IEC 61850 suggests specified ways to model substation IEDs to facilitate the communication between them. It is a set of conceptual rules which are independent of any particular current products, operating systems, programming languages, middleware, communication systems or vendors. [2] IEDs are modeled as a set of logical nodes according to the IED's functional decomposition. Each logical node has multiple data groups and each data group has multiple data attributes. An example of a logical node is the circuit breaker with the logical node name "XCBR". One of the data groups of this node is "Position" and one of the data attributes of this data group is "Status value". [2] IEC 61850 encompasses the strong points of the OSI 7-layer communication model. The two key message types, namely Generic Object Oriented Substation Event (GOOSE) and Sampled Values, are mapped using the bottom two layers, namely Data Link and Physical Layer. The client-server communication is mapped using all 7 layers. GOOSE messages are used for multicast peer-to-peer communication between IEDs and communication between IEDs and the substation computer. GOOSE messages are event-driven and not published on one specific time interval. Sampled Values messages are used for communication between

Fast bus protection using IEC 61850

“…In summary, GOOSE message is a user-defined and a self-described set of data that is "published" on detection of a change in any of the contained data items. GOOSE message is event-driven and not published on one specific time interval [11]. Any device on the local area network that is interested in the published data can subscribe to the publisher GOOSE message as desired.…”

“…proves a well designed IED can perform a detection of change with an average latency of 1ms in the receiving device.Bus Relay's Blocking TimeThe goal of this research was to determine if the implementation of IEC 61850 could improve the system disturbance clearing time per references[1,2,6,11,21]. The blocking time that the bus relay received from the feeder relay using the hardwired method and the IEC 61850 methods was captured and compared.…”

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