IEEE Power & Energy Magazine - September/October 2015 - 32

figure 3. A dashboard for wide area situational awareness in EPG's RTDMS
platform.

resources to prototyping and testing it
in its own environment.
NYISO employs a three-part strategy
for data quality management: calibration, validation, and bad data detection.
The data-conditioning algorithms are a
crucial component of a synchrophasor
data system and provide high-quality
synchrophasor data to end users such as
engineers, operators, and network applications. Synchrophasor data is used
to check for instrument transformer
polarity and phase sequence reversals
as well as cross-validating values with
supervisory control and data acquisition
(SCADA) data in the energy management system during both the summer
and winter seasons. NYISO is also
working toward a phasor-enhanced state
estimator to provide data conditioning
and bad data detection.
EPG has also invested significant
effort into addressing synchrophasor
data quality in all of its products. EPG
aims to enable synchrophasor data users
to detect data quality problems, diagnose
root causes, and validate and condition
data. These possibilities are driven by
several algorithmic techniques and an
LSE contained in the advanced validation and conditioning module as part of
EPG's DataNXT platform.

Visualization
Synchrophasor technology is considered
to be a foundational component of improved situational awareness and widefigure 4. A screenshot of PJM's synchrophasor dashboard that it shares with
area monitoring systems. EPG created a
its member organizations.
platform, the Real-Time Dynamics Monitoring System (RTDMS), for real-time
synchrophasor
data
visualization
to enable operators to monitor
a forum where top performers can share best practices and
the power grid (Figure 3).
lessons learned with other PJM members.
This platform can be used to visualize real-time synDVP's commitment to high-fidelity data is also captured
in its philosophy of the "complete package" for data quality. chrophasor data, application results, and weather data, all
This approach addresses the end-to-end health of the syn- superimposed over geographical displays and electric infrachrophasor system-from the instrument transformers, to structure. These displays are supplemented by customizable
the PMUs, to the substation PDCs, through the fiber com- trends, bar charts, and oscillation mode meters. In the near
munications and IT transport layers, and ultimately to the future, EPG will integrate schematic one-line diagrams into
central PDC. This philosophy accommodates the under- their portfolio of displays in their RTDMS platform, a feastanding that, even with a well-built and perfectly tuned sys- ture valued by many transmission organizations.
As users of the RTDMS software, NYISO, PJM, and DVP
tem, there are naturally occurring levels of data loss and data
quality issues that must be resolved through data condition- all share a common philosophy that synchrophasor data visuing. DVP's LSE, which is publicly available as open source, alization should be simplistic and effective. The strategy has
is the heart of the data-conditioning strategy. PJM also been to display synchrophasor data in traditional and familunderstands the value in LSE technology as it has dedicated iar forms to drive adoption of the technology. Additionally,
32

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IEEE Power & Energy Magazine - September/October 2015 - Cover3
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