The Research of a Derivation Calculation Method for the Maximum Power Point in Grid-Connect Photovoltaic System

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A derivation calculation methods for the maximum power point tracking is proposed in this paper. This method is the direct calculation method for the maximum power point tracking, through the calculation of the derivative value of the power to voltage, adjust the change values of occupies emptiescompared, which is used to deduce the voltage and current value, judge whether the derivative of the power to the voltage is zero, if it is ture, the maximum power point is got. Hardware is used the method to regulate the duty ratio of PWM in DC/DC boost circuit ,though once sampling, it can calculate the value of voltage and the duty ratio at maximum power point. The prototype experiments using DSP2812 chip verify that the inverter can better realize the most power tracing, high accuracy, and the system has the high stability.

Info:

Periodical:

Advanced Materials Research (Volumes 588-589)

Edited by:

Lawrence Lim

Pages:

583-586

Citation:

Y. X. Wang et al., "The Research of a Derivation Calculation Method for the Maximum Power Point in Grid-Connect Photovoltaic System", Advanced Materials Research, Vols. 588-589, pp. 583-586, 2012

Online since:

November 2012

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$38.00

[1] D'Souza N S, Lopes L A C, XunJun Liu. An Intelligent maximum power point tracker using peak current control. IEEE 36 th Conference on power Electronics Specialists, 2005: 172-177.

DOI: https://doi.org/10.1109/pesc.2005.1581620

[2] Kuei-Hsiang Chao, Ching-Ju Li, and Meng-Huei Wang. A maximum power point tracking method based on extension neural network for PV systems. LNCS, 2009: 745-755.

DOI: https://doi.org/10.1007/978-3-642-01507-6_84

[3] Femia N, Petrone G, Spagnuolo G, et al. Optimizing duty-cycle perturbation of P&O MPPT technique. IEEE 35th Annual Power Electronics Specialists Conference, 2004: 1939-(1944).

DOI: https://doi.org/10.1109/pesc.2004.1355414

[4] Fangrui Liu, hanxu Duan. A variable step size INC MPPT method for PV system, IEEE ransactions on Industrial Electronics, 2008, 55(7): 2622-2627.

DOI: https://doi.org/10.1109/tie.2008.920550

[5] Fang Luo, Pengwei Xu. A variable step maximum power point tracking method using differential equation solution, IEEE Conference on Industrial Electronics and Applications, 2007, (2): 2259-2263.

DOI: https://doi.org/10.1109/iciea.2007.4318813