IEEE Power & Energy Magazine - September/October 2015 - 55

A major challenge in using PMU data for application
development is IEEE C37.118 data formats, supporting both
integer and floating points.

✔ enhanced situational awareness in real time
✔ visualization of df/dt and oscillations
✔ in the offline mode, the synchrophasors data is being

utilized for forensic analysis of faults, postdispatch
analysis of grid performance, and detection and analysis of oscillations in the power system.
After the synchronization of the southern regional grid on
31 December 2013 with the rest of the Indian grid, the angular
spread of phasors throughout the grid provides very useful information. The power flow from the eastern/central part of the grid
to southern India involves power transfer unidirectional over
2,500 km. The extreme angular difference between two points
in the grid has been found to be
a useful index. Figure 9 indicates
one such angular spread plot,
Afghanistan
which has been observed both
through simulations as well as
actual operation that the power
system is stressed on those days
when the extreme angular difference crosses 95-100°, necessitatPakistan
ing a higher degree of alertness.
The angular spread in addition
to other information provides a
useful tool to the NLDC system
operator for varying the HVdc
power order set points in the
grid besides other control actions
at RLDCs.

of its commissioning. It has now become an indispensable
part of the data resource available at the load dispatch center. Four years of experience has revealed several challenges
that need to be addressed during the upcoming full-fledged
project, called the Unified Real-Time Dynamic State Measurement (URTDSM) system. Some of the challenges are
discussed in detail here.

Challenges with Respect to
Visualization Tools in Real Time
A large volume of synchrophasor data is received and
stored at the control center. It is difficult to comprehend

Central PDC
Regional PDC
Local PDC
PMU (Pilot Project)
PMU (IPP)

China
Nepal

Bhutan

Bangladesh

Myanmar

Challenges
and Experiences
in WAMS
Implementations
The experience with synchrophasors has been a roller coaster
ride full of exhilaration and
excitement. Although the synchrophasors data is presently
available only from a few locations in the Indian grid compared to its size, it has dramatically raised visualization and
the level of understanding of
the power system in the control center within a few months
september/october 2015

Bay
of
Bengal

Sri Lanka

figure 8. Current PMU deployment in India.
ieee power & energy magazine

55



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - September/October 2015

IEEE Power & Energy Magazine - September/October 2015 - Cover1
IEEE Power & Energy Magazine - September/October 2015 - Cover2
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IEEE Power & Energy Magazine - September/October 2015 - Cover3
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