IEEE Power & Energy Magazine - January/February 2016 - 26

data exchange format, the complete model
is 11.3 mb (a zip file). It is true that the
size increases, but there are numerous
techniques used to make the exchange
efficient. The cIm offers the model partitioning approach so that you do not need
to send all data every time an exchange
occurs. In this example, the equipment
part is 7.67 mb (68% of the total amount),
the part representing the steady state is
0.97 mb, the topology part 1.82 mb, and
the solution part 0.83 mb. normally in
frequent exchanges, you would only need
to exchange the state stage hypothesis so
you would not be operating with big files.
currently. all tools archive the Xml files
to zip automatically so there are no worries about this. You can also use the techniques of difference file exchange where
you would exchange only the changes you
need to apply on a previously sent model.
Some people are concerned that it
might be more challenging to exchange
data by e-mail. This might be true, but in
our industry we are dealing with critical

infrastructure information. So why would
you allow data exchange by e-mail?

The Articles in This Issue
There are seven articles in this issue
that aim to
✔ explain the high-level challenges of power systems and related
use cases
✔ explain and demonstrate where
the cIm can be applied to help
resolve problems that power system engineers are facing
✔ bring forward current information on approaches that can resolve important issues in a key
domain such as data exchanges
in a complex and increasingly
challenging environment.
The first article, "Prescription for Interoperability," summarizes the main challenges related to the operation and development of bulk power systems around the
world. The environment is rapidly changing due to the need to integrate more re-

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newables into the electricity grid, use the
assets more efficiently, and cope with
structural changes in the power system
business. The authors illustrate the need
for more analytic work to be performed.
This requires seamless data exchanges
that meet the requirements of different
business domains. The success stories described in this and the following articles
confirm that the Iec cIm standards have
achieved a high level of maturity and
should be deployed as a best practice to
achieve data interoperability.
The adoption of smart metering immediately presents utilities with a huge
increase in the volume of data associated
with the core function of reading meters.
The next article in the issue, "everything's Talking to each other," focuses on
this topic. In the absence of information
standards, each data-enrichment scenario
would, at worst, involve its own implementation effort to reconcile different local
representations, with no ability to reuse
artifacts from similar previous efforts. The

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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - January/February 2016