Open AccessRobust decentralised load frequency control for interconnected time delay power systems using sliding mode techniques
Author(s) -
Onyeka Adrian E.,
XingGang Yan,
Mao Zehui,
Jiang Bin,
Zhang Qingling
Publication year - 2020
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2019.0809
Subject(s) - control theory (sociology) , sliding mode control , robustness (evolution) , electric power system , lyapunov function , computer science , robust control , mode (computer interface) , automatic frequency control , control system , power (physics) , control engineering , engineering , control (management) , nonlinear system , telecommunications , physics , quantum mechanics , artificial intelligence , electrical engineering , operating system , biochemistry , chemistry , gene
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.