Sunday, September 20, 2015

IEC TC 57 Reference Architecture For Power Systems Management And Associated Information Exchange

IEC TC 57 just published a new draft for IEC TR 62357-1 Ed. 2 “Power systems management and associated information exchange – Part 1: Reference architecture” (57/1621/DC)

“The new edition provides updates and defines layered Reference Architecture to help direct longer term goals and activities, specifically to ensure compatibility of all new standards developed in TC57 by benefitting from lessons learned during development of the current standards and their application on actual utility projects as well as through application of other internationally recognized architecture standards.

This edition reflects the progress recently achieved from the international Smart Grids (SG) initiatives and the CIGRE D2.24 large system architecture vision. It also leverage the work done by NIST-SGIP, CEN-CELELEC-ETSI SGCG M490, IEC TC8 Smart Grids Roadmap, and IEC TC8 WG5, WG6, The edition also reflects the most recent editions of the TC 57 standards including IEC 61850 Edition 2 and the IEC 61968, 61970, and 62325 Common Information Model (CIM) standards.”

One of the lessons learned is that the three information models (CIM, IEC 61850 and COSEM) need some additional harmonization – a reasonable level has already be reached.


IEC 61850 has a very broad application domain and has defined many useful information models that can (and will) be “tapped” by COSEM and CIM applications.

One example that shows that IEC 61850 can be used even for schedules (de: Fahrpläne):


These schedules can be mapped from COSEM directly to IEC 61840 logical node FSCH. COSEM may be used for flexible tariffs while IEC 61850 could be used for tariffs as well as for control of switchable equipment like circuit breakers or change settings for loads or generation. The schedule LN is applied in the VHPready 4.0 specification.

More to come soon.

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