Disturbance Observer‐Aided SSA‐TID Control for Frequency Stabilisation in Hybrid Renewable Power Systems

Rakibul Hasan; Md. Mahmudul Hasan; M. S. Rana; Fariya Tabassum; Mst. Nafisa Binte Reza

doi:10.1049/rpg2.70137

journal article Open Access Jan 01, 2025

Disturbance Observer‐Aided SSA‐TID Control for Frequency Stabilisation in Hybrid Renewable Power Systems

Rakibul Hasan

Md. Mahmudul Hasan

M. S. Rana Fariya Tabassum

Mst. Nafisa Binte Reza

IET Renewable Power Generation Vol. 19 No. 1 · Institution of Engineering and Technology (IET)

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Abstract

ABSTRACT
Power systems with high renewable energy (RE) penetration are increasingly vulnerable to frequency instabilities caused by the stochastic nature of RE sources and load‐generation imbalances. Additional challenges such as communication delays in phasor measurement units (PMUs), nonlinearities like governor deadband (GDB) and generation rate constraints (GRC) and cross‐coupling between load frequency control (LFC) and automatic voltage regulation (AVR) loops further impair system stability. This paper proposes an efficient control framework that combines a fractional‐order tilt‐integral‐derivative (TID) controller, optimised using the salp swarm algorithm (SSA), with a continuous‐time disturbance observer (DO) for real‐time estimation and rejection of aggregate disturbances. Unlike traditional approaches that rely solely on complex feedback controllers, the integration of the DO improves robustness against nonlinearities and disturbances while maintaining a low‐order control structure. The controller parameters are optimised over a nonlinear time‐delay model of a two‐area hybrid power system, considering both inter‐area coupling and dynamic uncertainties, using SSA, genetic algorithm (GA), particle swarm optimisation (PSO) and Archimedes optimisation algorithms (AOA). The proposed SSA‐TID‐DO controller achieved the lowest objective function value (IAE = 0.2367), clearly outperforming SSA‐TID (0.4082), SSA‐PID (0.6413), PSO‐TID (0.4434), GA‐TID (0.4515) and AOA‐TID (0.4435) controllers. The results highlight the effectiveness and practicality of the proposed strategy for robust frequency regulation in RE‐dominated power systems.

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Details

Published: Jan 01, 2025
Vol/Issue: 19(1)
License: View

Authors

R

Rakibul Hasan

Department of Electrical & Electronic Engineering Rajshahi University of Engineering & Technology Rajshahi Bangladesh

M

Md. Mahmudul Hasan

Department of Electrical & Electronic Engineering Rajshahi University of Engineering & Technology Rajshahi Bangladesh

M

M. S. Rana

Department of Electrical & Electronic Engineering Rajshahi University of Engineering & Technology Rajshahi Bangladesh

F

Fariya Tabassum

Department of Electrical & Computer Engineering Rajshahi University of Engineering & Technology Rajshahi Bangladesh

M

Mst. Nafisa Binte Reza

Department of Electrical & Electronic Engineering Pundra University of Science & Technology Bogura Bangladesh

Cite This Article

Rakibul Hasan, Md. Mahmudul Hasan, M. S. Rana, et al. (2025). Disturbance Observer‐Aided SSA‐TID Control for Frequency Stabilisation in Hybrid Renewable Power Systems. IET Renewable Power Generation, 19(1). https://doi.org/10.1049/rpg2.70137

Disturbance Observer‐Aided SSA‐TID Control for Frequency Stabilisation in Hybrid Renewable Power Systems

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