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

Yu Xin Wang; Feng Ge Zhang; Xiao Ju Yin; Shi Lu Zhu

doi:10.4028/www.scientific.net/AMR.588-589.583

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 588-589The Research of a Derivation Calculation Method...

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

Abstract:

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.

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Periodical:

Advanced Materials Research (Volumes 588-589)

Pages:

583-586

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.588-589.583

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Online since:

November 2012

Authors:

Yu Xin Wang, Feng Ge Zhang, Xiao Ju Yin, Shi Lu Zhu

Keywords:

DC/DC Booster Circuit, Derivation Calculation Method, Maximum Power Point (MPP), PWM

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References

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