A Practical Integration of Automatic Generation Control and Demand Response
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ShiltzAnnaswamyACC2016_header.pdf
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Author(s)
Shiltz, Dylan
Annaswamy, Anuradha
Date Issued
October 16, 2015
Series/Report no.
IEEE ACC;2016
Abstract
For a power grid to operate properly, electrical
frequency must be continuously maintained close to its nominal
value. Increasing penetration of distributed generation, such as
solar and wind generation, introduces fluctuations in active power
while also reducing the natural inertial response of the electricity
grid, creating reliability concerns. While frequency regulation
has traditionally been achieved by controlling generators, the
control of Demand Response resources has been recognized in
recent smart grid literature as an efficient means for providing
additional regulation capability. To this end, several control
methodologies have been proposed recently, but various features
of these proposals make their practical implementations difficult.
In this paper, we propose a new control algorithm that facilitates
optimal frequency regulation through direct control of both
generators and Demand Response, while addressing several issues
that prevent practical implementation of other proposals. In
particular, i) our algorithm is ideal for control over a large,
low-bandwidth network as communication and measurement is
only required every 2 seconds, ii) it enables Demand Response
resources to recover energy lost during system transients, and iii)
it accommodates both measured disturbances and unmeasured
disturbances. We demonstrate the viability of our approach
through dynamic simulations on a 118-bus grid model.
Subjects
Optimal AGC
direct load control
demand response
frequency regulation
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