A two-steps algorithm improving the P%26O steady state MPPT efficiency

作者：Mamarelis Emilio; Petrone Giovanni^*; Spagnuolo Giovanni

来源：Applied Energy, 2014, 113: 414-421.

DOI：10.1016/j.apenergy.2013.07.022

• Photovoltaic
• Maximum power point tracking
• Switching converters

A key point in the control of photovoltaic (PV) systems is the design of the maximum power point tracking (MPPT) algorithm. Although a huge number of approaches has been proposed in literature, the methods based on the perturb and observe (P%26O) technique are the most widely employed in commercial products. The reason is in the fact that P%26O can be implemented in cheap digital devices by assuring high robustness and a good MPPT efficiency. The low hardware resources required by the P%26O algorithm are especially useful in distributed MPPT architectures, where the cost makes the difference. The performances of the P%26O algorithm implemented in a digital device are affected by the quantization effect and numerical approximations. In this paper the basic P%26O algorithm is suitably improved in order to compensate for these effects. A design recipe for choosing the best values of the P%26O parameters is also given. The conclusions of the theoretical analysis are validated through simulations and experiments.

• 出版日期2014-1