An Investigation on Efficient PID Controller Tuning Methods for Controlling Dual Input Single Output Buck Converter used for Electric Vehicle Application

Sarala Kumari Gurijala, John Pradeep Darsy

Abstract


Multiport DC–DC converters play an important role in energy conversion and integration in renewable energy source (RES) systems and electric vehicles. In multi-source environments, conventional buck converters cannot combine voltages, and using separate converters for each source is uneconomical. To address this limitation, researchers have developed multiport converter topologies. This work investigates a Dual-Input Single-Output (DISO) buck converter with the PID controllers in the feedback loop. There are a variety of tuning techniques available for tuning the gain parameters. Among them, two PID tuning approaches are considered: response-based methods and transfer-function-based methods. The response-based approach is further classified into Open Loop Transient Response (OLTR) methods and Error Performance Index (EPI) methods. The PID gains for both voltage and current controllers are obtained using these tuning techniques, and their performance is evaluated using time-domain and frequency-domain parameters. Results show that the IAE-2 PID tuning method provides the best performance for the voltage controller, with an 81% difference in peak overshoot between the best and worst tuning methods. For the current controller, the Min-IAE-Wang and Min-ITAE-Wang methods perform best. Although the peak overshoot variation is only 1.2%, a significant difference of 1760 in phase margin is observed. The analysis is carried out using MATLAB/Simulink.

Keywords


buck converter; dual input single output; electrical vehicle; PID controller;

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v16i1.15056.g9165

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