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Load Modulation at Two Locations for Damping of Electro-Mechanical Oscillations in a Multimachine System

Samuelsson, Olof LU (2000) IEEE Power Engineering Society Summer Meeting, 2000 In Power Engineering Society Summer Meeting, 2000. IEEE 3. p.1912-1917
Abstract
Modulation of customer loads for increased power system damping is suggested as an alternative to control of HVDC links and FACTS devices. The loads are modeled as real power controlled by local bus frequency, which is equivalent to viscous damping in a mechanical system. The qualitative aspects of the interaction between two load modulation controllers are studied using linearized models of two test systems with three and twenty-three machines respectively. Root locus plots show that transfer function zeros limit damping. Tuning a controller for maximum relative damping is equivalent to impedance matching. This is used to explain the zero dynamics and why a second controller may not be able to contribute to added damping. Time simulations... (More)
Modulation of customer loads for increased power system damping is suggested as an alternative to control of HVDC links and FACTS devices. The loads are modeled as real power controlled by local bus frequency, which is equivalent to viscous damping in a mechanical system. The qualitative aspects of the interaction between two load modulation controllers are studied using linearized models of two test systems with three and twenty-three machines respectively. Root locus plots show that transfer function zeros limit damping. Tuning a controller for maximum relative damping is equivalent to impedance matching. This is used to explain the zero dynamics and why a second controller may not be able to contribute to added damping. Time simulations of a nonlinear system model verifies the final design of the controllers for the large test system (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
load regulation oscillations power system control power system transient stability root loci transfer functions
in
Power Engineering Society Summer Meeting, 2000. IEEE
volume
3
pages
1912 - 1917
conference name
IEEE Power Engineering Society Summer Meeting, 2000
external identifiers
  • Scopus:0037478654
ISBN
0-7803-6420-1
DOI
10.1109/PESS.2000.868826
language
English
LU publication?
yes
id
18faf669-514e-4626-b8ff-ee6bb497e8a1 (old id 4357719)
alternative location
http://www.iea.lth.se/~ielolof/olof/SM00.pdf
date added to LUP
2014-11-26 16:25:41
date last changed
2016-10-13 04:54:08
@misc{18faf669-514e-4626-b8ff-ee6bb497e8a1,
  abstract     = {Modulation of customer loads for increased power system damping is suggested as an alternative to control of HVDC links and FACTS devices. The loads are modeled as real power controlled by local bus frequency, which is equivalent to viscous damping in a mechanical system. The qualitative aspects of the interaction between two load modulation controllers are studied using linearized models of two test systems with three and twenty-three machines respectively. Root locus plots show that transfer function zeros limit damping. Tuning a controller for maximum relative damping is equivalent to impedance matching. This is used to explain the zero dynamics and why a second controller may not be able to contribute to added damping. Time simulations of a nonlinear system model verifies the final design of the controllers for the large test system},
  author       = {Samuelsson, Olof},
  isbn         = {0-7803-6420-1},
  keyword      = {load regulation oscillations power system control power system transient stability root loci transfer functions},
  language     = {eng},
  pages        = {1912--1917},
  series       = {Power Engineering Society Summer Meeting, 2000. IEEE},
  title        = {Load Modulation at Two Locations for Damping of Electro-Mechanical Oscillations in a Multimachine System},
  url          = {http://dx.doi.org/10.1109/PESS.2000.868826},
  volume       = {3},
  year         = {2000},
}