OPTIMAL LOAD DISPATCHING THROUGH WIND ENERGY AND SOLAR ENERGY SYSTEMS

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M.kumudwathi, Dr.G.sreenivasan, Dr.R.kiranmayi

Abstract

Conventional resources of energy such as coal and fossil fuels are now being
replaced with renewable sources. Solar PV and wind energy conversion systems are
being widely employed for harvesting electric energy. Modern power electronic
converters have made it possible to draw maximum power from these solar and wind
energy conversion systems. This paper presents a hybrid energy system that integrates
wind energy from Permanent Magnet Synchronous Generator (PMSG) and a
photovoltaic (PV) solar system. Maximum Power Point Tracking (MPPT) algorithm is
implemented that extracts maximum power from PV array under constantly changing
environmental conditions. The outputs of wind turbine and PV array are integrated
suitably in order to retain continuous power supply as per load requirement. Operation
of wind generator is mainly determined by estimation of speed which is carried out by a
sensor-less rotor speed estimator. This estimator replaces all mechanical sensors and
they are no longer needed. The turbine speed is thus governed based on the estimated
rotor speed by controlling the voltage and current at the input of Boost converter. The
proposed system is designed and simulated on Matlab / Simulink platform and results
are discussed.

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