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Accurate Regulation of the Power Output of a Two-Stage Photovoltaic System with Minimal Local Energy Storage
V.K. Kolakaluri,
Published in Institute of Electrical and Electronics Engineers Inc.
2022
Abstract
The conventional maximum power point tracking controllers are being replaced with the flexible power point tracking (FPPT) controllers to overcome the issues associated with the excess photovoltaic (PV) power production. The FPPT controller adjusts the PV array power output in accordance with the user specified reference power command (RPC). However, the PV array power output may not be adjusted precisely at the specified RPC because of the duty ratio quantization problem. As a result, there would be some power tracking error between the actually specified RPC and the tracked PV array output power. The power tracking error on the PV side eventually leads to a power tracking error on the grid side if no compensation is made. The main objective of this paper is to reduce the power tracking error on the grid side by compensating the power tracking error on the PV side with the help of a low capacity local energy storage system. A coordinated control strategy between the FPPT control and the local energy storage control is developed to achieve the specific objective. The efficacy of the proposed control strategy is verified using the MATLAB simulation studies, and the results are presented. © 2022 IEEE.
About the journal
Journal2022 IEEE International Conference on Power Systems Technology: Embracing Advanced Technology in Power and Energy Systems for Sustainable Development, POWERCON 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Open AccessNo