IEEE Power & Energy Magazine - January/February 2015 - 69

figure 10 shows a practical example of a power line
corridor split into sections; each section has its own input
weather data. as mentioned previously, the rating of the section with the lowest rating (the section at the vertical red line)
is declared as the power line's thermal rating.

that, when it trips, causes the largest rise of load on the
power line of interest.
the quadrants are colored green if the ratio of the line
current to the rating is less than 90%. If the ratio is between

Exceptional Weather Events

SUMO DV Solvenija

In the case of weather events that could potentially lead
to power line outages directly (thunderstorms, high wind
speeds) or indirectly (high air temperatures and consecutively low ratings), the operator in charge is presented with
warnings (see figure 11) and notifications (see figure 12)
on the live weather situation of the power grid. In case of
a local thunderstorm, the operator can focus on the line in
question and reassess its outage in detail using other tools as
well (e.g., SCaDa and other load flow tools), thus confirming the outage's influence on the rest of the system.

✔✔ n-1 power line: the power line in the transmission grid

54% 62%
62% 65%
42% 44%
55% 55%
34% 30%
50% 46%
21% 22%
29% 31%

figure 13. The visualization platform: ODIN-VIS screenshot.

Visualization: Putting It All Together

the visualization subsystem provides a means of aggregating this
vast amount of data in a convenient
and easily understood manner. the
results are presented in real time to
dispatchers in the network control
center using an advanced visualization platform, oDIn-VIS (see
figure 13).
at the center of the screen, a portion of the transmission grid is shown
(see figure 13). the power lines are
colored according to the ratio of the
actual current to the actual rating.
on the right side of the screen is the
Sumo panel, which for each power
line shows the following:
✔✔ "four-quadrant" view of the
relative line load, including
*	first quadrant (upper left):
actual line current versus
actual line rating for actual network topology
*	second quadrant (upper
right): forecast line current
versus forecast line rating
for actual network topology
*	third quadrant (lower left):
actual line current versus
actual line rating for n-1
network topology
*	fourth quadrant (lower
right): forecast line current
versus forecast line rating
for n-1 network topology
*	exceptional weather events.
january/february 2015

150%

130%

115%

figure 14. Application of dynamic line rating in Germany.
ieee power & energy magazine

69



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - January/February 2015

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IEEE Power & Energy Magazine - January/February 2015 - Cover3
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