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TRACKING ALGORITHM FOR OPTIMAL PHOTOVOLTAIC (PV) EFFICIENCY UNDER DIFFUSED LIGHT

IP.com Disclosure Number: IPCOM000195517D
Publication Date: 2010-May-04
Document File: 5 page(s) / 64K

Publishing Venue

The IP.com Prior Art Database

Abstract

A tracking algorithm for optimizing photovoltaic efficiency under diffused light that maximizes the efficiency of photovoltaic system is disclosed. The tracking algorithm described herein optimizes photovoltaic efficiency under diffused light by tracking the direction of maximum percentage of light and positioning the photovoltaic plate towards the direction of maximum percentage of light to obtain maximum yield.

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RP13351

TRACKING ALGORITHM FOR OPTIMAL PHOTOVOLTAIC (PV) EFFICIENCY

UNDER DIFFUSED LIGHT

BRIEF ABSTRACT

    A tracking algorithm for optimizing photovoltaic efficiency under diffused light that maximizes the efficiency of photovoltaic system is disclosed. The tracking algorithm described herein optimizes photovoltaic efficiency under diffused light by tracking the direction of maximum percentage of light and positioning the photovoltaic plate towards the direction of maximum percentage of light to obtain maximum yield.

KEYWORDS

    Solar tracker, algorithm, tracking algorithm, optimal PV efficiency, diffuse light, cloud, overcast.

DETAILED DESCRIPTION

    Photovoltaic systems supply a sinusoidal power over the day due to the movement of the sun over the horizon. To obtain a constant power supply, the Sun needs to be tracked using solar trackers to position photovoltaic plates accordingly. Generally, solar trackers are active or passive and may be single axis or dual axis. Usually, single axis trackers have a manual elevation (axis tilt) adjustment on a second axis which is adjusted on regular intervals throughout the year. There are two types of dual axis trackers, polar and altitude-azimuth.

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RP13351

Solar tracking may cause up to 35% more yield over a full sunny day. The tracking is done on sunny days as well as on cloudy days.

    However, on cloudy days, irradiance consists of indirect sun light coming from all directions due to diffusion. As illustrated in Figure 1, conventional solar trackers are not able to handle the diffused light. Thereby, tracking the Sun on cloudy days or overcast days results in reduced efficiency, than the fixed position photovoltaic plates.

    Therefore, there is a need in the art for a technique to increase the efficiency of photovoltaic modules using solar trackers under diffused light conditions.

    A tracking algorithm for optimizing photovol...