IEC 61850 Qualifications

Quanta Technology's industry experts have participated in the development of the IEC 61850 protocol since its inception in 1995, and through its absorption of EPRI UCA in 2000 to yield the single international multivendor standard for substation protection and data integration. IEC 61850 is a compendium of definitions of communications services and objects at several layers of the OSI 7-layer communications stack. The specific services of IEC 61850 should be mapped to application needs in order to design practical substation protection and control systems, with assessment of products, tools, risks and risk mitigation strategies for each facet of the deployment.

The most widely recognized IEC 61850 services are:

• GOOSE Messaging – Publisher-subscriber service for transfer of status, control, and analog information among peer servers (interacting IEDs) at millisecond speeds equaling or exceeding the speed of the dedicated point-to-point wiring that GOOSE aims to replace.

• Information and Control Object Exchanges – Substation specific messages passed between servers (IEDs) and clients (substation host computers or concentrators) for operational and non-operational data – local HMI, SCADA and EMS, and operations support.

• Sampled Values or Process Bus Messaging – For bringing switchyard power system data (such as volt-age and current waveforms from VTs and CTs) from switchyard data collecting and apparatus control units (merging units) to IEDs in the control building on optical fibers that replace conventional switchyard wiring. This technology has triggered industry attention with the recent introduction of the first products from major vendors.

• A Host of Other Services – Device configuration and parameter settings, file transfer for non-operational data, time synchronization, etc.