DECENTRALIZED CONTROLLERS FOR INTERCONNECTED POWER SYSTEMS
Date
1983-03
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ORCID
Type
Degree Level
Masters
Abstract
This thesis presents the results of studies carried out into problems associated with the provision of auxiliary damping of electromechanical oscillations in a multi-machine electrical power system. A particular real power system comprised of five generating plants and an infinite bus was investigated in these studies.
A review is given of the approaches used at present to improve system damping using power system stabilizers and alternative approaches utilizing modern control system theory are proposed.
The procedures followed in the mathematical modelling of the various power system components are given in detail and the digital computer-simulation of the system under study is described.
Two specific approaches to power system stabilizer design, on a linearized-system basis, are presented. The first leads to a centralized controller which depends for its operation on the exchange of data between the central controller and each of the plants. Simulation studies indicate that this control approach could give good results but it is unsatisfactory because of its absolute reliance upon sound telemetery channels. The second approach leads to localized controllers, one at each plant, without the need
for data exchange between the plants or with the plants and the central control device. Simulation studies indicate that this could offer a viable alternative to the schemes which are in use at the present time for power system stabilization.
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Degree
Master of Science (M.Sc.)
Department
Electrical Engineering