A Novel Sensorless Photovoltaic Power Reserve Control With Simple Real-Time MPP Estimation



Li, X ORCID: 0000-0002-1262-406X, Wen, H, Zhu, Y, Jiang, L, Hu, Y ORCID: 0000-0002-1007-1617 and Xiao, W
(2018) A Novel Sensorless Photovoltaic Power Reserve Control With Simple Real-Time MPP Estimation. IEEE Transactions on Power Electronics.

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Abstract

IEEE Power reserve control (PRC) becomes esential for modern photovoltaic power plants to meet the increased ancillary service requirements such as grid frequency support. Conventional PRC strategies show obvious limitations in terms of additional hardware requirements, implementation difficulty, and dynamic response. Originated from the linear characteristic of PV curves in the current source region and Lambert-W function, a novel PRC strategy is proposed for the dc/dc converter of a two-stage PV system in order to always achieve the reduced-power operation for any given reference while realizing the real-time maximumum PV power (MPP) estimation with simple implementation. The proposed strategy requires no additional hardwares such as the irradiance and temperature sensors, which realizes sensorless control with reduced cost. Furthermore, cumbersome procudures of curve fitting with sophisticated operating points sampling and key paratmers determination in the real-time MPP estimation by using the conventional PRC methods can be eliminated. In this strategy, the operating point with a curtailed power level is allocated at the left-hand side of the MPP, which guarantees the stability of PV systems under varying conditions. The developed strategy exhibits fast dynamic response, high robustness, and good compatibility with existing PV systems. Simulation and experimental results under variouis scenarios are provided to validate the effectiveness of the proposed strategy.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 20 Nov 2018 09:02
Last Modified: 14 Dec 2019 08:26
DOI: 10.1109/TPEL.2018.2880461
URI: http://livrepository.liverpool.ac.uk/id/eprint/3028932
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