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CIGRÉ 2004 Paris

IEC 61850 based digital communication
as interface to the primary equipment

F. ENGLER (ABB), T. L. KERN (ABB), L. ANDERSSON (ABB)
B. KRUIMER (KEMA), G. SCHIMMEL (Tamarack), K. SCHWARZ (NettedAutomation)

KEYWORDS

IEC 61850 -- Substation Automation -- Station Bus -- Process Bus -- SV – GOOSE -- MMS -- Ethernet -- Stack -- Feasibility Study

INTRODUCTION

During the past years, the IEC TC57 defined the IEC 61850 standard for Communication Networks and Systems in Substations. This standard is now ready to be used, not only between the station level computer and the bay level devices, but also for the open communication to the primary equipment.

In the past, a typical substation automation system contained a station bus connecting the bay level equipment (relays, bay controllers) with the station level equipment. IEC 61850 not only standardizes the communication technology used in conjunction with the station-/interbay bus, but also facilitates universal SA modeling. Digital communication interfaces to the process level are additional benefits of the IEC 61850.

The digital communication will replace traditional wiring between the bay level devices on one side and the instrument transformers and switchgear apparatuses on the other side. Product standards for primary equipment using these new interfaces already exist or are under preparation. IEC 61850 uses mainstream communication technologies like switched Ethernet and TCP/IP. The benefit of this choice is, that commonly available and accepted communication components can be used. However, while the use of Ethernet for the communication between station and bay level does not seem to create any problems, it needed to be verified that the same technology can be used for the more time critical communication between the control and protection devices and the primary apparatuses.

The paper gives an overview of the feasibility studies made with IEC 61850 in the process-close area.

Download paper [pdf, 830 KB]

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