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http://dx.doi.org/10.5207/JIEIE.2013.27.9.074

A Variable Step Size Incremental Conductance MPPT of a Photovoltaic System Using DC-DC Converter with Direct Control Scheme  

Cho, Jae-Hoon (Smart Logistics Technology Institute, Hankyong National University)
Hong, Won-Pyo (Dept. of Building Science & Plant Engineering, Hanbat National University)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.27, no.9, 2013 , pp. 74-82 More about this Journal
Abstract
This paper presents a novel maximum power point tracking for a photovoltaic power (PV) system with a direct control plan. Maximum power point tracking (MPPT) must usually be integrated with photovoltaic (PV) power systems so that the photovoltaic arrays are able to deliver maximum available power. The maximum available power is tracked using specialized algorithms such as Perturb and Observe (P&O) and incremental Conductance (indCond) methods. The proposed method has the direct control of the MPPT algorithm to change the duty cycle of a dc-dc converter. The main difference of the proposed system to existing MPPT systems includes elimination of the proportional-integral control loop and investigation of the effect of simplifying the control circuit. The proposed method thus has not only faster dynamic performance but also high tracking accuracy. Without a conventional controller, this method can control the dc-dc converter. A simulation model and the direct control of MPPT algorithm for the PV power system are developed by Matlab/Simulink, SimPowerSystems and Matlab/Stateflow.
Keywords
Photovoltaic(PV); Maximum Power Point Tracking(MPPT); Direct Control Scheme; Matlab/Simulink and SimPowerSystems; Matlab/Stateflow; Fuzzy Membership;
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