access icon free Dynamic performance improvement of buck–cuk converter in renewable energy resources using EHO optimised PR controller

© The Institution of Engineering and Technology
Received 25/01/2020, Accepted 08/06/2020, Revised 22/05/2020, Published 11/06/2020

Renewable energy resources energy is widely collected from the natural resources of wind, photovoltaic, and geothermal heat energy. Generally, the hybrid system is affected by the unwanted power quality issues such as harmonics, voltage sag, and swell. The proportional resonant (PR) controller is optimised with an Elephant herding optimisation (EHO) algorithm to investigate the dynamic performance of buck–cuk power converters in hybrid renewable energy sources. The proposed power converter is used to regulate the level of voltages by controlling the switching pulse of the converter depending on the duty cycle ratio. An EHO algorithm is employed for tuning the PR controller gain parameters. In the grid side, shunt active power filters are integrated, and the inductor–capacitor–inductor filter is utilised for solving the overshoot and settling time problems. The total harmonic distortion (THD) and steady-state error are reduced by the proposed technique. The proposed system is designed with the help of MATLAB/Simulink platform, and the output response is determined with the simulated results. The dynamic response of the proposed system is examined based on simulated outcomes, and THD comparison analysis is performed with the existing controllers such as proportional–derivative, proportional–integral–derivative, and fuzzy controller.

Inspec keywords: renewable energy sources; harmonic distortion; dynamic response; voltage control; electric current control; DC-DC power convertors; active filters; power harmonic filters; inductors; PI control; fuzzy control; control system synthesis; power supply quality; power grids; switching convertors; three-term control

Other keywords: inductor–capacitor–inductor filter; EHO algorithm; dynamic response; PR controller gain parameters; buck–cuk power converters; duty cycle ratio; dynamic performance improvement; buck–cuk converter; proportional–derivative –integral–derivative controller; hybrid system; fuzzy controller; Elephant herding optimisation algorithm; total harmonic distortion; settling time problems; voltage swell; voltage sag; EHO optimised PR controller; hybrid renewable energy sources; active power filters; geothermal heat energy; renewable energy resources energy; proportional resonant controller; power converter; unwanted power quality issues

Subjects: Control system analysis and synthesis methods; Current control; Other power apparatus and electric machines; Voltage control; Fuzzy control; Power supply quality and harmonics; Control of electric power systems; DC-DC power convertors

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