Title :
A combined two-method MPPT control scheme for grid-connected photovoltaic systems
Author :
Dorofte, Cristinel ; Borup, Uffe ; Blaabjerg, Frede
Author_Institution :
PowerLynx A/S, Sonderborg
Abstract :
In order to increase the output efficiency of a grid-connected photovoltaic (PV) system it is important to have an efficient maximum power point tracker (MPPT). In the case of low irradiation, the perturb and observe (PO) and incremental conductance (IC) methods have a poor efficiency, because of the poor resolution in the acquired signals, when a fixed point implementation is done. A cost-effective two-method MPPT control scheme is proposed in this paper to track the maximum power point (MPP) at both low and high irradiation, by combining a constant voltage (CV) method and a modified PO algorithm. Simulation and experimental results are presented to verify the performance of the proposed method
Keywords :
photovoltaic power systems; power generation control; constant voltage method; grid-connected photovoltaic systems; incremental conductance methods; maximum power point tracker; perturb and observe methods; two-method MPPT control scheme; Control systems; Costs; Digital signal processing; Mesh generation; Photovoltaic systems; Power generation; Renewable energy resources; Signal resolution; Uniform resource locators; Voltage; DSP; efficiency; renewable energy systems; simulation; solar cell system;
Conference_Titel :
Power Electronics and Applications, 2005 European Conference on
Conference_Location :
Dresden
Print_ISBN :
90-75815-09-3
DOI :
10.1109/EPE.2005.219714
