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Onyeka, Adrian E.; Xing-Gang, Yan; Mao, Zehui; Jiang, Bin; Zhang, Qingling

Robust decentralised load frequency control for interconnected time delay power systems using sliding mode techniques. (English) Zbl 07907075

IET Control Theory Appl. 14, No. 3, 470-480 (2020).
Summary: Based on a sliding mode control, a multi-area decentralised load frequency control power system with time-varying delays and non-linear perturbations is designed in this study. Due to the destabilising effect of delay on the global system, it is necessary to design a control system to accommodate vast time delays so as to manage the deviation in frequency and interchange power. By taking advantage of the system structure and disturbance bounds, robustness is improved. A sliding surface is designed, and the stability of the corresponding sliding motion is analysed based on Lyapunov-Razumikhin function. A delay dependent decentralised sliding mode control is synthesised to drive the system to the sliding surface and maintain a sliding motion afterwards. The obtained results are applied to a two-area interconnected power system to demonstrate the effectiveness of the proposed method.
© 2021 The Authors. IET Control Theory & Applications published by John Wiley & Sons, Ltd. on behalf of The Institution of Engineering and Technology

Cited in 5 Documents

MSC:

93B35 Sensitivity (robustness)
93A14 Decentralized systems
93C80 Frequency-response methods in control theory
93B12 Variable structure systems
93B70 Networked control
93C43 Delay control/observation systems

Keywords:

delays; time-varying systems; load regulation; frequency control; variable structure systems; robust control; control system synthesis; power system control; Lyapunov methods; decentralised control; power system interconnection; interconnected systems; interconnected time delay power systems; mode techniques; sliding mode control; multiarea decentralised load frequency control power system; time-varying delays; nonlinear perturbations; global system; control system; vast time delays; interchange power; system structure; disturbance bounds; sliding surface; corresponding sliding motion; two-area interconnected power system
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References:

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