Power Reserves Control for PV Systems With Real-Time MPP Estimation via Curve Fitting

被引:141
作者
Batzelis, Efstratios I. [1 ,2 ]
Kampitsis, Georgios E. [1 ]
Papathanassiou, Stavros A. [1 ]
机构
[1] Natl Tech Univ Athens, Sch Elect & Comp Engn, Athens 15780, Greece
[2] Imperial Coll London, Dept Elect & Elect Engn, London SW7 2AZ, England
关键词
Active power control; curve fitting; linearized converter model; maximum power point tracking (MPPT); photovoltaic (PV); power reserves; single-diode model; RIPPLE CORRELATION CONTROL; PHOTOVOLTAIC MODULE MPP; POINT TRACKING; MODEL PARAMETERS; CONTROL STRATEGY; ENERGY-STORAGE; EXTRACTION; GENERATION;
D O I
10.1109/TSTE.2017.2674693
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In order for a photovoltaic (PV) system to provide a full range of ancillary services to the gird, including frequency response, it has to maintain active power reserves. In this paper, a new control scheme for the dc/dc converter of a two-stage PV system is introduced, which permits operation at a reduced power level, estimating the available power (maximum power point-MPP) at the same time. This control scheme is capable of regulating the output power to any given reference, from near-zero to 100% of the available power. The proposed MPP estimation algorithm applies curve fitting on voltage and current measurements obtained during operation to determine the MPP in real time. This is the first method in the literature to use the nonsimplified single-diode model for the determination of the MPP and the five model parameters while operating at a curtailed power level. The developed estimation technique exhibits very good accuracy and robustness in the presence of noise and rapidly changing environmental conditions. The effectiveness of the control scheme is validated through simulation and experimental tests using a 2-kW PV array and a dc/dc converter prototype at constant and varying irradiance conditions.
引用
收藏
页码:1269 / 1280
页数:12
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