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Convergence analysis and tuning of Ripple Correlation based MPPT: a sliding mode approach
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| Author(s) |
Alessandro COSTABEBER, MAURO ZIGLIOTTO, Matteo CARRARO |
| Abstract |
The development of fast MPPT (Maximum Power Point Tracking) algorithms for photovoltaic (PV)systems able to track variable irradiation conditions with high bandwidth is becoming attractive,especially for mobile applications. This paper focuses on the well known ripple correlation technique,proposing an analysis that provides an upper bound to the convergence time in response to solarirradiation steps. The availability of an upper bound enables the prediction of the dynamic behaviourof the MPPT, and gives a set of guidelines for a proper tuning of the controller to fit specific dynamicrequirements. The analysis is based on a simple application of sliding control theory, and it alsoincludes chattering phenomena and the effects of parasitic reactive elements of the PV module. Matlabsimulation and experimental tests are provided on a 35W panel interfaced to a 24V battery through aboost converter. A controllable LED illuminator has been used as solar generator, able to provideirradiation step changes with a bandwidth of 1kHz. The results confirm the effectiveness of both theanalysis and tuning. |
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| Filename: | 0266-epe2013-full-17551556.pdf |
| Filesize: | 1.111 MB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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