Adaptive Step Size With Adaptive-Perturbation-Frequency Digital MPPT Controller for a Single-Sensor Photovoltaic Solar System

作者：Jiang Yuncong^*; Abu Qahouq Jaber A; Haskew Tim A

来源：IEEE Transactions on Power Electronics, 2013, 28(7): 3195-3205.

DOI：10.1109/TPEL.2012.2220158

• Adaptive-perturbation-frequency perturb and observe (P& O) algorithm
• adaptive step size
• dc-dc converters
• maximum power point tracking (MPPT)
• photovoltaic (PV)
• solar energy

This paper presents a load-current-based maximum power point tracking (MPPT) digital controller with an adaptive-step-size and adaptive-perturbation-frequency algorithm. Only one sensor is needed in the controller circuitry since the MPPT controller is only utilizing the load current information. By utilizing a variable step-size algorithm, the speed, accuracy, and efficiency of the PV system MPPT are improved when compared to the fixed step-size load-current-based algorithm. Furthermore, the proposed adaptive algorithm utilizes a novel variable perturbation frequency scheme which further improves the controller speed. The concept and operation of the load-current adaptive-step-size and adaptive-perturbation-frequency MPPT controller are presented, analyzed, and verified by results obtained from a proof-of-concept experimental prototype.

• 出版日期2013-7