Design of Fractional Order Cascaded Controller for AGC of a Deregulated Power System

The aim of this paper is to study the automatic generation control (AGC) in a restructured power system. The power system under study has five different diversified energy sources assisting some real time nonlinearities like generation rate constraint (GRC), governor dead band (GDB), and boiler dyna...

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Published in:Journal of control, automation & electrical systems automation & electrical systems, 2022, Vol.33 (5), p.1389-1417
Main Authors: Jena, Narendra Kumar, Sahoo, Subhadra, Sahu, Binod Kumar, Mohanty, Kanungo B.
Format: Article
Language:English
Subjects:
Algorithms
Automatic control
Control
Control and Systems Theory
Controllers
Degrees of freedom
Deregulation
Electrical Engineering
Engineering
Mechatronics
Perturbation
Proportional integral derivative
Robotics
Robotics and Automation
Robust control
Time lag
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Summary:The aim of this paper is to study the automatic generation control (AGC) in a restructured power system. The power system under study has five different diversified energy sources assisting some real time nonlinearities like generation rate constraint (GRC), governor dead band (GDB), and boiler dynamics. Three controllers such as PID, two-degrees of freedom PID-PD cascaded controller with derivative filters (2-DOF-PIDN-PDN) and 2-DOF fractional order PID-fractional order PD cascaded controller with derivative filters (2-DOF-FOPIDN-FOPDN) are designed to dispatch the scheduled and unscheduled power under different contracts such as poolco, bilateral and contract violation-based transactions through different tie-lines. But, time delay is a vital factor which influences the performance of AGC immensely. So, the impact of time delay to the system under contract violation-based power transaction is explored in this work. The controller gains are enumerated by applying a nascent wild goat algorithm (WGA) technique assisting with an integral time absolute error (ITAE) as objective function. The proposed controller incorporating with WGA algorithm is validated by comparing with a recently published work. Along with this, the potential of WGA algorithm over PSO and DE is presented. The superior performance of 2-DOF-FOPIDN-FOPDN controller in comparison to PID and 2-DOF-PIDN-PDN controller is established well. Further, the robustness of the 2-DOF-FOPIDN-FOPDN controller is examined against sporadic load perturbation and parametric variation of the system.
ISSN:2195-3880
2195-3899
DOI:10.1007/s40313-022-00897-z