Reaction Curve-Assisted Rule-Based PID Control Design for Islanded Microgrid

T. K. Bashishtha, V. P. Singh, U. K. Yadav and T. Varshney ()
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T. K. Bashishtha: Department of Electrical Engineering, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India
V. P. Singh: Department of Electrical Engineering, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India
U. K. Yadav: Department of Electrical Engineering, Malaviya National Institute of Technology, Jaipur 302017, Rajasthan, India
T. Varshney: Department of Electrical Electronics and Communication Engineering, Sharda University, Greater Noida 201310, Uttar Pradesh, India

Energies, 2024, vol. 17, issue 5, 1-19

Abstract: In a renewable energy-based islanded microgrid system, frequency control is one of the major challenges. In general, frequency oscillations occur in islanded microgrids due to the stochastic nature of load and variable output power of distributed generating units (DGUs). In the presented research proposal, frequency oscillations are suppressed by implementing the proportional integral derivative (PID) controller-based control design strategy for an islanded microgrid. The modeling of the islanded microgrid is firstly presented in the form of a linearized transfer function. Further, the derived transfer function is approximated into its equivalent first-order plus dead time (FOPDT) form. The approximated FOPDT transfer function is obtained by employing the reaction curve method to calculate the parameters of the FOPDT transfer function. Furthermore, the desired frequency regulation is achieved for the manifested FOPDT transfer function by incorporating PID control design. For PID controller tuning, different rule-based methods are implemented. Additionally, comparative analysis is also performed to ensure the applicability of the comparatively better rule-based tuning method. The Wang–Chan–Juang (WCJ) method is found effective over other rule-based tuning methods. The efficacy of the WCJ method is proved in terms of transient response and frequency deviation. The tabulated data of tuning parameters, time domain specifications, and error indices along with responses are provided in support of the presented control strategy.

Keywords: islanded microgrid; rule-based methods; controller tuning; frequency regulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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