A Free Model Based Controller Design for Power System Stabilization
| Authors: | Ko Hee-Sang, University of British Columbia, Canada
Lee Kwang Y., Pennsylvania State University, United States
Kim Ho-Chan, Cheju National University, Korea, Republic of |
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| Topic: | 6.3 Power Plants and Power Systems |
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| Session: | Excitation Systems and PSS |
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| Keywords: | Free model, power system stabilization, simultaneous perturbation stochastic approximation, linear quadratic regulator. |
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Abstract
This paper presents an intelligent modeling approach, named as free model approach, for a closed-loop system identification using input and output data and its application to design a power system stabilizer (PSS). The free model concept is introduced as an alternative intelligent system technique to design a controller for an unknown system with input and output data only. The parameters of the free model can be obtained by the SPSA method. The feasibility of the proposed method is demonstrated in a one-machine infinite-bus power system. The linear quadratic regulator method is applied to the free model to design a PSS for the system, and compared with the conventional PSS in different loading conditions and system failures such as the outage of a major transmission line or a three phase to ground fault which causes the change of the system structure.
