An Improved Multistage Variable-Step MPPT Algorithm for Photovoltaic System


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This paper presents an improved multistage variable-step incremental conductance method to achieve the maximum power point tracking (MPPT). Compared with the traditional variable-step incremental conductance method, this improved algorithm optimizes the selection of the step size so that the tracking of the maximum power point is more quickly and the steady-state performance is better. Furthermore, the algorithm can still guarantee the quickness and accuracy of MPPT when the environmental conditions change suddenly and tremendously. At last, matlab simulation was applied to compare the characteristics of multistage variable-step algorithm with that of the other. And the simulation results verified that the improved algorithm has better dynamic and steady-state performance.



Edited by:

J. Z. Ma




P. Wang et al., "An Improved Multistage Variable-Step MPPT Algorithm for Photovoltaic System", Applied Mechanics and Materials, Vols. 347-350, pp. 1833-1838, 2013

Online since:

August 2013




[1] Li R S, Zhou P Q, Li Y B. Terrestrial Photovoltaic Power Generation Systems and Applications. Beijing: China Electric Power Press, 2011, p.20–33.

[2] Wu C F, Zhang J X, Chen Y K. Solar Photovoltaic Power Generation and Lighting System. Beijing: Science Press, 2009, p.130–142.

[3] Li X Y, Wang X, Zhang F, Zhang Y. The MPPT Improved Algorithm and Simulation under Changing Irradiance of Grid-Connected PV Systems. Energy Technology, 2009, vol. 5.

[4] Wang L Q, Sun X F. Photovoltaic Technology in Distributed Generation Systems. Beijing: Mechanical Industry Press, 2010, p.63–71.

[5] Fu J S, Xiao D S, Yang Q C. Analysis of characteristics of solar cells based on Matlab/simulink. Electronic Component Applications, 2012, vol. 2, pp.44-46.

[6] Dong M, Yang J, Yu J R. Improved Maximum Power Point Tracking Experiment Method in Variable Environment. Proceedings of the Chinese Society of Universities for Electric Power System and Automation, 2012, vol. 3, pp.41-45.

[7] Si C T, Zhou L, Zhang Y Y, Liu Q, Feng Y. Simulation Research on Output Characteristics of Photovoltaic Array and MPPT Control. East China Electric Power, 2010, vol. 38(2), pp.284-287.

[8] Ma X J, Wu J Y, Li Y M, Zhang L H. The Research on the Algorithm of Maximum Power Point Tracking in Photovoltaic Array. 2009, vol. 6, pp.36-38+51.

[9] Wang P, Ding H, Diao C Y. An Improved MPPT Algorithm Based on Traditional Incremental Conductance Method. PESA2011, Hong Kong, 2011, pp.1-4.

[10] Cheng J Z, Wu X K, Li S S, Zuo W X. Boost-based Two-level Grid-connected Photovoltaic Inverter System. High Voltage Engineering, 2009, vol. 8, p.2048-(2052).

[11] Glasner, I. Advantage of boost vs. buck topology for maximum power point tracker in photovoltaic systems. 19th Annu. IEEE Conv. Electr. Electron. Eng. Israel, Jerusalem, Israel, 1996, pp.355-358.


[12] Wang P, Ding H, The Design and Simulation Research on MPPT and Repetitive Control Strategy of Single-Phase Photovoltaic Grid-Connected System. Tianjin:Tianjin University, school of electrical engineering and automation, (2011).