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

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...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2013-07, Vol.28 (7), p.3195-3205
Main Authors: Yuncong Jiang, Qahouq, J. A. Abu, Haskew, T. A.
Format: Article
Language:English
Subjects:
Adaptive algorithms
Adaptive control systems
adaptive step size
Adaptive-perturbation-frequency perturb and observe (P&O) algorithm
Algorithm design and analysis
Algorithms
Applied sciences
Circuit properties
Circuits
Control systems
Controllers
dc-dc converters
Digital
Digital circuits
Direct energy conversion and energy accumulation
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical machines
Electrical power engineering
Electronic circuits
Electronics
Energy
Equipments, installations and applications
Exact sciences and technology
Frequencies
Frequency control
Heuristic algorithms
maximum power point tracking (MPPT)
Natural energy
Perturbation methods
Photoelectric conversion
photovoltaic (PV)
Photovoltaic conversion
Power supply
Regulation and control
Solar energy
Solar power generation
Steady-state
Tracking
Transient analysis
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Description
Summary: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.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2012.2220158