IEEE Power & Energy Magazine - March/April 2018 - 65

This innovative framework for system operation
allows periodic and automatic studies, identifies potential
constraints, and, accordingly, determines if actions are needed.
tests should be designed and optimized. new automated test
tools and maintenance instructions have to be available.
maintenance crews will require exposure and training in
new environment.

Focus on the Monitoring System
a wide range of sensors has been available for installation for
years. The problem was collecting the data in the field and
sending them to control and/or maintenance centers, generally for system alarms. each vendor solution was proprietary.
With the introduction of ieC 61850, sensors could now be
considered as ieDs, including ieC 61850 interfaces, and, if
not, a multifield protocol interface box could be designed,
which opened new possibilities to convert alarms (threshold
trespass like insufficient level of sF6) in actual monitoring.
The Blocaux integrated digitalized sas (Dsas) operates a
wide variety of sensors. For instance, on a power transformer
we monitor (increased rate trend and alarms) the cooling fans
and pumps, fault gas accumulation in the Buchholz relay, oil
temperature, power dissipation, power factor, capacitance, and
partial discharge around the bushings, as well as a dissolved gas
analyzer (nine faults gases analysis via a photoacoustic method)
and a moisture-in-oil estimation.
For circuit breakers and disconnectors, we have installed
the control and monitoring of open-close contact, real-time

current, motor/pump start information, sF6 information, and
torque and current in switchgear drives. For busbars and
switchgear, an infrared hot spot detection is under commission. To contribute to the sustainable development, water
supply, storm water discharge, auxiliary units, and the technical buildings' main services (temperature control, electrical
consumption, and lights) control and metering have also been
installed (Figure 9).

Focus on Computational Resources for
Implementation of Advanced Functions
The DLr function is becoming a key issue for rTe as for
many Tsos. numerous ways to perform it are under consideration or already deployed on rTe's grid. one uses online
sag and conductor temperature-embedded measurements and
combines this information with offline external computations of ampacity margin versus operational rules based on
risk analysis. The DLr provides a rating status or a warning
to the Tso.
another DLr option takes local weather measurements
(temperature, wind velocity, and direction) into account plus
voltage and current levels to compute an equivalent thermal state
of a given line. should one supplement it with local future wind
and solar photovoltaic generation, then an algorithm might be
devised to apply a local margin or restriction to all the concerned

figure 9. Thermal imaging of the busbars at the Blocaux substation.
march/april 2018

ieee power & energy magazine

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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2018

Contents
IEEE Power & Energy Magazine - March/April 2018 - Cover1
IEEE Power & Energy Magazine - March/April 2018 - Cover2
IEEE Power & Energy Magazine - March/April 2018 - Contents
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IEEE Power & Energy Magazine - March/April 2018 - Cover3
IEEE Power & Energy Magazine - March/April 2018 - Cover4
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