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Open AccessArticle

A Novel Plant Propagation-Based Cascaded Fractional Order PI Controller for Optimal Operation of Grid-Connected Single-Stage Three-Phase Solar Photovoltaic System

Department of Electrical Engineering, Inha University, 100, Inha-ro, Nam-gu, Incheon 402-751, Korea
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Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(20), 4269; https://doi.org/10.3390/app9204269
Received: 30 August 2019 / Revised: 1 October 2019 / Accepted: 8 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Computational Intelligence in Photovoltaic Systems 2019)
Grid-connected photovoltaic (PV) inverters are gaining attention all over the world. The optimal controller setting is key to the successful operation of a grid-connected PV system. In this paper, a novel plant propagation algorithm-based fractional order proportional-integrator (FOPI) controller for cascaded DC link voltage and inner current control of a grid-connected PV controller has been proposed, which outperforms particle swarm optimization-based PI and elephant herding optimization-based FOPI in terms of multicriteria-based analysis. The performance of the proposed controller also has been measured in terms of total harmonic distortion to maintain the appropriate power quality. Also, the proposed controllers were tested under various solar irradiance and voltage sag conditions to show the effectiveness and robustness of the controllers. The whole system is developed in OPAL-RT using MATLAB/Simulink and RT-LAB as a machine-in-loop (MIL) system to validate the performance in real time. View Full-Text
Keywords: grid-connected PV; DC link voltage controller; inner current controller; fractional order PI controller; plant propagation algorithm; particle swarm optimization; elephant herding optimization grid-connected PV; DC link voltage controller; inner current controller; fractional order PI controller; plant propagation algorithm; particle swarm optimization; elephant herding optimization
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Zamee, M.A.; Won, D. A Novel Plant Propagation-Based Cascaded Fractional Order PI Controller for Optimal Operation of Grid-Connected Single-Stage Three-Phase Solar Photovoltaic System. Appl. Sci. 2019, 9, 4269.

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