Control aspects of synchronous machines in power systems applications
Control aspects of synchronous machines in power systems applications
Developments in control design methods for power systems have continually been made during the last ten years, and the present thesis seeks to make its contribution to this pattern of work. In so doing, it develops electrical machine mathematical models on which the subsequent designs are based. The formulations relate specifically to those from which computer programs may be readily developed and particular importance has been attached to the systematic marshalling of plant and network equations for the subsequent and efficient solution by computer methods. Methods of model reduction and state transformation are described and these are used to manipulate the system models into the form appropriate to the regulator design algorithm. The regulator-design algorithm is described in which a systematic numerical technique is used to predetermine the performance criterionJ = C(xtQx + u )dt. The constraints imposed on the system response by the design specification are associated with the movement of the eigenvalue locations to give actual values for the elements of Q. The algorithm described, for the linear single-input system, is based on the sensitivity of the elements of Q to shifts in the eigenvalue locations to produce a performance criterion for improved system stability. The resulting algorithm is applied to the design of an a.c. turbo generator excitation control and is shown to give a system that has advantages over a controller designed using conventional techniques. The thesis is supported by four published papers in which the author of the present thesis is joint author. One reports on the development of the design algorithm and the others deal with computational aspects of control design and its-application to power systems; computer listings are presented in the papers. In addition, the author's work has been presented at two conferences for which published records exist.
University of Southampton
Stringfellow, David Christopher
1978
Stringfellow, David Christopher
Stringfellow, David Christopher
(1978)
Control aspects of synchronous machines in power systems applications.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Developments in control design methods for power systems have continually been made during the last ten years, and the present thesis seeks to make its contribution to this pattern of work. In so doing, it develops electrical machine mathematical models on which the subsequent designs are based. The formulations relate specifically to those from which computer programs may be readily developed and particular importance has been attached to the systematic marshalling of plant and network equations for the subsequent and efficient solution by computer methods. Methods of model reduction and state transformation are described and these are used to manipulate the system models into the form appropriate to the regulator design algorithm. The regulator-design algorithm is described in which a systematic numerical technique is used to predetermine the performance criterionJ = C(xtQx + u )dt. The constraints imposed on the system response by the design specification are associated with the movement of the eigenvalue locations to give actual values for the elements of Q. The algorithm described, for the linear single-input system, is based on the sensitivity of the elements of Q to shifts in the eigenvalue locations to produce a performance criterion for improved system stability. The resulting algorithm is applied to the design of an a.c. turbo generator excitation control and is shown to give a system that has advantages over a controller designed using conventional techniques. The thesis is supported by four published papers in which the author of the present thesis is joint author. One reports on the development of the design algorithm and the others deal with computational aspects of control design and its-application to power systems; computer listings are presented in the papers. In addition, the author's work has been presented at two conferences for which published records exist.
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Published date: 1978
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Local EPrints ID: 458466
URI: http://eprints.soton.ac.uk/id/eprint/458466
PURE UUID: 0d0d6dab-1e1c-471a-98c1-6253d8a9d567
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Date deposited: 04 Jul 2022 16:49
Last modified: 04 Jul 2022 16:49
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Author:
David Christopher Stringfellow
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