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http://dx.doi.org/10.5207/JIEIE.2012.26.8.027

MPPT Control of Photovoltaic using Variable IC Method  

Ko, Jae-Sub (순천대학교)
Chung, Dong-Hwa (순천대학교 전기제어공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.26, no.8, 2012 , pp. 27-34 More about this Journal
Abstract
This paper proposes variable incremental conductance(IC) algorithm for maximum power point tracking(MPPT) control of photovoltaic. The conventional perturbation & observation(PO) and IC MPPT control algorithm generally uses fixed step size. A small step size reduces a tracking error in the steady state but slows a tracking speed in the transient state. Also, a large step size is fast a tracking speed but increases a tracking error. Therefore, this paper proposes variable IC MPPT algorithm that adjust automatically step size according to operating conditions. To improve a tracking speed and accuracy, when operating point is far from the maximum power point(MPP), the step size uses maximum value and when a operating point is near from the MPP, the step size uses variable step size that adjust according to slope of P-V curve. The validity of MPPT algorithm proposed in this paper prove through compare with conventional PO and IC MPPT algorithm.
Keywords
PV System; MPPT; PO; IC; Variable Step Size; P -V Curve;
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Times Cited By KSCI : 1  (Citation Analysis)
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