Abstract :
Low power photovoltaic (PV) systems are commonly used in stand-alone applications. For these systems, a simple and cost-effective
maximum power point tracking (MPPT) solution is essential. In this paper, a fast and low cost analog MPPT method for low power PV
systems is proposed. By using two voltage approximation lines (VALs) to approximate the maximum power point (MPP) locus, a lowcomplexity
analog MPPT circuit can be developed. Theoretical derivation and detailed design procedure will be provided in this paper.
The proposed method boasts the advantages such as simple structure, low cost, fast tracking speed and high tracking efficiency. To validate
the correctness of the proposed method, simulation and experimental results of an 87W PV system will also be provided to demonstrate
the effectiveness of the proposed technique.
2011 Elsevier Ltd. All rights reserved.
