DOI:https://doi.org/10.1007/s40565-018-0458-5 |
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Effects of fractional-order PI controller on delay margin in single-area delayed load frequency control systems |
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Author:
Vedat C¸ ELIK1, Mahmut Temel O¨ ZDEMIR1, Kwang Y. LEE2
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Author Affiliation:
1. Department of Electrical and Electronics Engineering,
Faculty of Engineering, Firat University, Elazıg˘, Turkey
2. Department of Electrical and Computer Engineering, Baylor
University, Waco, USA
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Foundation: |
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Abstract: |
This study aims to determine the improvement
effect on the delay margin if fractional-order proportional
integral (PI) controller is used in the control of a singlearea
delayed load frequency control (LFC) system. The
delay margin of the system with fractional-order PI control
has been obtained for various fractional integral orders and
the effect of them has been shown on the delay margin as a
third controller parameter. Furthermore, the stability of the
system that is either under or over the delay margin is
examined by generalized modified Mikhailov criterion.
The stability results obtained have been confirmed
numerically in time domain. It is demonstrated that the
proposed controller for delayed LFC system provides more
flexibility on delay margin according to integer-order PI
controller. |
Keywords: |
Delay dependent stability, Delay margin,
Fractional-order proportional integral (PI), Generalized
modified Mikhailov criterion, Load frequency control with
delay |
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Online Time:2019/03/08 |
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