IEEE Power & Energy Magazine - May/June 2014 - 45

Using Synchrophasor Data to
Validate Power Plant Models

as conditions in the power plant change-when equipment is
upgraded, for example. The importance of keeping models current is reflected in the policy of the Western electricity coordinating council (Wecc) and several other grid-operating
entities, which require power plant model revalidation every five
years or when changes are made to relevant plant equipment.
The revalidation of the power plant models can be
achieved by repeating the staged tests that are the basis of
the initial model construction, but this is expensive due to
lost revenue, fuel requirements, and other costs. it also does
not provide a complete picture, as staged tests cannot capture
the response of the generator to unplanned disturbances on
the power grid. The increasing use of phasor measurement
units (PMUs) and synchrophasor data has enabled operators
to analyze the response of generators to such disturbances,
which in turn has begun to improve power plant models
and can pave the way for validation models using PMUs to
supplement and potentially defer certain staged tests. Power
plant model validation techniques developed with funding
from the DOe and the bPa could ultimately reduce outages,
increase reliability, and reduce the costs associated with
power plant model validation testing.

Limitations of Today's Models
Power plant modeling accuracy became a concern in
1996, when the Western interconnection experienced several major power system outages. System engineers at the
Western Systems coordinating council (WScc, now the
Wecc) attempted to reproduce these events using their
existing power grid simulation software, but they found

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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - May/June 2014

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IEEE Power & Energy Magazine - May/June 2014 - Cover3
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