International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 08 | Aug 2024
p-ISSN: 2395-0072
www.irjet.net
MODELING OF SOLAR PHOTOVOLTAIC MAXIMUM POWER POINT TRACKING BATTERY CHARGE CONTROLLER FOR STANDALONE SYSTEM APPLICATIONS Balraju Akhila1 and Dr. K. Naga Sujatha2 1M. Tech. Student, Dept. of Electrical and Electronics Engineering, JNTUHUCESTH, Hyderabad, India. 2Professor of Electrical and Electronics Engineering, JNTUHUCESTH, Hyderabad, India.
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Abstract -The solar photovoltaic MPPT battery charge
distribution to the batteries and improving efficiency can be achieved by operating the PV module at its maximum power point [6,7]. To charge the batteries a three-stage charging method is used which prevents the batteries from overcharging or deep discharging. This work also presents a battery charge controller, which is intended to extend the battery life. With MATLAB-SIMULINK, the entire system is simulated, and the outcomes are shown.
controller for lead acid and nickel-cadmium batteries used in standalone systems were presented in this paper. The MPPT battery charge controller is implemented using a buck converter. The purpose of the controller is to extend battery life and boost photovoltaic (PV) system efficiency. To achieve this, the three-stage charging strategy and the MPPT (Maximum power point Tracking) methodology were employed. The results shows that the lead acid battery controllers performance gives high efficiency than that of the nickel-cadmium battery controller performance. The proposed techniques were implemented in the MATLAB/SIMULINK environment. Key Words: PV System, Perturb and Observe algorithm, Buck converter, Battery Charge Controller, Three-stage charging method.
1.INTRODUCTION In the last ten years, solar photovoltaic energy has drawn a lot of interest. Up to 181 GW installed worldwide, it is one of the renewable energy sources with the quickest growth [1]. The PV module's power-voltage characteristics vary depending on the surrounding air conditions and have a distinct peak. Taking into account the PV system's initial cost, it is always necessary to run photovoltaic cells at maximum power point (MPP). Dc-dc converter interface is necessary for this purpose between battery and SPV. Additionally, to extend the battery's life, the controller for charging batteries is necessary [2]. PV cell properties (I-V or V-P) are also nonlinear and vary with temperature and insolation. The most expensive parts of standalone solar PV systems are the batteries and PV modules. The lifespan of the batteries is shortened when they are connected directly to the PV modules since there is no safeguard against overcharging [3]. Charge controllers can be used to prevent batteries from being overcharged, however they are less efficient than typical charge controllers since they do not operate PV modules at MPP. Running the PV module at its maximal power point will maximize power delivery to the batteries and enhance efficiency [4]. Additionally, a longer battery life requires the battery charging controller. Rechargeable batteries are often used by freestanding solar systems as a means of energy storage [5]. Optimizing power
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Fig 1. Block diagram of Solar PV MPPT battery charge controller The above figure 1. Shows the block diagram of Solar PV MPPT battery charge controller. The solar irradiance and temperature are the input to the Solar PV array. The P&O technique takes the PV array current and voltage as the inputs and gives the duty cycle as output. The battery charge controller takes the battery voltage and initial state of charge as the inputs and follows the three-stage charging method conditions and produces the current, voltage and state of charge of battery. The duty cycle and outputs from battery charge controller are passed through multiply block to the PWM generator for the output of the buck converter switching device.
2.Maximum Power Point Tracking Battery charge controller The MPPT battery charge controller block consists of Perturb and Observe technique and Battery charge controller.
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