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Vol. 175, Issue 7, July 2014, pp. 150-155




A Maximum Power Point Tracking Method Combined with Constant Voltage Tracking
& Variable Step-Size Perturbation

* Kaisheng Zhang, Pan Cheng, Lifeng He

Shanxi University of Science and Technology, College of electrical& information engineering Xi’an, 710021, China
* Tel.: 02986168628, fax: 02986168628

* E-mail: skdzks@sina.com


Received: 20 March 2014 /Accepted: 30 June 2014 /Published: 31 July 2014

Digital Sensors and Sensor Sysstems


Abstract: According to the characteristics of photovoltaic cell output power curve, this paper analyzed and explained the principle of Maximum Power Point Tracking (MPPT) and both advantages and disadvantages of constant voltage tracking method & perturbation observation method. Further, in combination with the advantages of existing maximum power tracking methods, this paper comes up with an improved tracking method which is recognized as maximum power point tracking combined with constant voltage tracking method & variable step-size perturbation observation method. The Simulink simulation results have proven this enhanced tracking method has a better performance in System response and steady state characteristics.


Keywords: Photovoltaic, MPPT, Matlab, Perturbation observation, System simulation.


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