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URL:
http://www.iec.ch/cgi-bin/procgi.pl/www/iecwww.p?wwwlang=E&wwwprog=dirwg.p&ctnum=2613
Object models for Distributed Energy Resources (DER) are
being developed in the IEC TC57 WG17 and for Wind Turbines, in IEC TC88 WG25,
to become international standards for communicating with DER systems. These
object models are based as much as possible on the IEC61850 object modeling
concepts and core components. In particular they use existing Common Data
Classes (CDCs) and Logical Nodes (LNs) where these meet the requirements. They
only add new CDCs and LNs where these are necessary for the unique
characteristics of DER devices and systems.
The scope of the DER object modeling is illustrated
in the Figure 1 below, while Figure 2 provides a list of the DER object models.
In 2003 a draft of the DER object document was submitted to the IEC as a
starting draft for the DER object models, and the first meeting of the WG was
held in April 2004.
Working Group 17 is tasked with making
recommendations and standards for communication with Distributed Energy
Resource Devices. The development of the standard is requirements driven but
through participation of WG members familiar with IEC 61850, a high degree of
re-use and compatibility with IEC 61850 is anticipated.
Advantages/Strengths
The DER object models meet IntelliGrid Architecture High Level
Concepts of using abstract information modeling as a core method. These object
models will support interoperability among the many stakeholders that need to
exchange information with DER systems. These include the DER Owners, Marketers,
Distribution System Operators, DER Operators, Distribution System Maintenance,
and DER Device Maintenance personnel.
Disadvantages/Weaknesses
At this time (early 2004) object models for only
three DER device types have been developed as drafts. The DER object models are
only in draft form, and still require significant review by the IEC working
groups.
Keywords:
DER, Distributed Energy Resources, ADA, Advanced Distribution
Automation, Object Models, Distributed Resources, DR, distributed generation,
alternative energy, Logical Nodes, LN, CDC, distribution system
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