IEEE Power & Energy Magazine - March/April 2020 - 20

The authors present a case study of a
wide-area damping controller for damping interarea oscillations and discuss
plans to further develop the simulator,
including a possible extension for future
hardware-in-the-loop capabilities.
The final article, by Jan Alam, Patrick Balducci, Kevin Whitener, and
Steve Cox, discusses an ESS control.
The system optimizes the physical operation of a 5-MW/1.25-MWh battery
system to balance demands among the
battery blocks and coordinates with the
centralized energy-management system
to maximize the economic value of the
overall system by providing energy arbitrage, capacity, ancillary services, and
system security. The authors first present
a technical description of the ESS and
the use cases considered. They then provide major considerations for ESS control strategy development perspectives
and processes, including technical and
financial aspects. Actual operation results and some features of the deployed
control system are presented, followed

by lessons learned for electric utilities that would like to apply ESSs. The
controls coordinate the ESS operation
among multiple use cases and manage
charging and discharging the ESS in a
manner that satisfies the requirements of
each use case, so operational constraints
are not violated.
In his "In My View" column, Dale
A. Douglass shares the insights he
gained through more than 50 years of
experience in transmission line design
and analysis. He begins with a brief
overview of the history of line-design
optimization, the relationship of line
parameters, and the amount of power
that can be transmitted over a line. He
then discusses conductor selection, particularly comparing the capabilities of
the widely used aluminum conductor
steel-reinforced (ACSR) to new hightemperature conductors, i.e., aluminum
conductor steel supported (ACSS). With
the same conductor diameter, ACSS can
yield new lines with 50% higher thermal
ratings and the same electrical losses,

at a capital cost that is typically only
5-10% higher than that for ACSR.
The higher ratings avoid future powerflow constraints that can otherwise
occur due to the system-planning uncertainties produced by the combination of
increasing use of renewable generation,
distributed generation, and open access
transmission. Examples demonstrate the
advantages to using a high-temperature
conductor. With the growing uncertainty
in generation patterns as we transition to a
lower-carbon and renewable-based power
system, the added robustness achieved
by avoiding potential future power-flow
constraints due to line thermal rating
could be very beneficial, especially since
it could be available for a very modest
additional investment.
We would like to extend our sincere
appreciation to the authors and for the
editorial support provided by Mike Henderson and the IEEE Power & Energy
Magazine publications staff.


p&e


https://www.nuscalepower.com/benefits/cost-competitive

IEEE Power & Energy Magazine - March/April 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2020

Contents
IEEE Power & Energy Magazine - March/April 2020 - Contents
IEEE Power & Energy Magazine - March/April 2020 - Cover2
IEEE Power & Energy Magazine - March/April 2020 - 1
IEEE Power & Energy Magazine - March/April 2020 - 2
IEEE Power & Energy Magazine - March/April 2020 - 3
IEEE Power & Energy Magazine - March/April 2020 - 4
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IEEE Power & Energy Magazine - March/April 2020 - 96
IEEE Power & Energy Magazine - March/April 2020 - Cover3
IEEE Power & Energy Magazine - March/April 2020 - Cover4
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