An Effective Design and Implementation of Hybrid MPP Tracking Scheme based on Linear Tangents & Neville Interpolation (LT-NI) Technique for Photovoltaic (PV) System
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Date
2017
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Abstract
Solar power is free from environmental pollution and also offers economic benefits to the
investors. In order to optimize at most solar power, tracking schemes are employed and traditional schemes
from the family of perturbation suffer from slow response, due to specific step size disruption and
oscillations around operating point. Therefore, this paper proposes an effective design and implementation
of a hybrid Maximum Power Point Tracking (MPPT) scheme based on Linear Tangents - Neville
Interpolation (LT-NI) techniques. Two tangents are drawn on the P-V characteristics at 75% and 90% of
open circuit voltage (VOC).The chosen two tangents intersect and gives rise to a third voltage (N) point. In
continuation, the three voltage points (0.75VOC, N & 0.9VOC) are computed using Neville Interpolation. The
performance of the proposed LT-NI scheme is compared with Perturb & Observe (P&O) and advanced
Divide and Conquer (DC) algorithms.