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MATLAB Simulation of Grid-Connected PV Wind Battery System

The demand for renewable energy sources has been growing rapidly in recent years. Among them, solar and wind power are the most popular choices for clean energy production. However, the intermittent nature of these sources can make it challenging to integrate them into the grid. Therefore, the combination of PV, wind, and battery energy storage systems (BESS) has become a popular solution to overcome this challenge. In this article, we will discuss the MATLAB simulation of a grid-connected PV wind battery system.

Introduction

The integration of multiple renewable energy sources with BESS into the grid has become a popular solution to reduce the dependency on fossil fuels and improve the reliability of the power supply. This system consists of a photovoltaic (PV) array, a wind turbine generator (WTG), and a battery energy storage system. The PV and WTG generate DC power, which is then converted to AC power using inverters. The inverter output is then connected to the grid through a point of common coupling (PCC). The BESS stores the excess energy generated by PV and WTG for future use.

Design and Modelling

The design and modeling of the grid-connected PV wind battery system can be achieved through MATLAB simulation. The simulation model consists of the following components:

PV Module

The PV module is the core component of the system. It consists of a group of solar cells that convert sunlight into electrical energy. The amount of electrical energy generated by the PV module depends on several factors, including the irradiance, temperature, and shading. The simulation of the PV module can be achieved using the PVLIB MATLAB toolbox.

Wind Turbine Generator

The WTG is another source of renewable energy that can be integrated into the system. The amount of electrical energy generated by the WTG depends on the wind speed and turbine characteristics. The simulation of the WTG can be achieved using the Wind Turbine Toolbox in MATLAB.

Battery Energy Storage System

The BESS is used to store the excess energy generated by the PV and WTG for future use. The simulation of the BESS can be achieved using the Simulink library of MATLAB.

Inverter

The inverter is used to convert DC power generated by the PV and WTG into AC power. The simulation of the inverter can be achieved using the Power Electronics Toolbox in MATLAB.

Simulation Results

The simulation of the grid-connected PV wind battery system can provide insights into the system's performance and behavior under different operating conditions. The simulation results can help to optimize the system's design and control strategies.

Power Output

The power output of the system depends on the availability of solar and wind energy and the state of the battery. The simulation results show that the system can generate a significant amount of power under favorable conditions. However, the power output can be affected by various factors, including the weather, shading, and battery state of charge.

Battery State of Charge

The BESS plays a crucial role in the system's operation by storing excess energy generated by PV and WTG for future use. The simulation results show that the battery state of charge varies depending on the operating conditions. The state of charge can be optimized by controlling the charging and discharging of the battery.

Power Quality

The power quality of the system is essential for reliable and safe operation. The simulation results show that the power quality of the system meets the standards set by the grid operator. However, the power quality can be affected by various factors, including the inverter's quality and the grid's voltage stability.

Conclusion

The simulation of the grid-connected PV wind battery system using MATLAB provides insights into the system's performance and behavior under different operating conditions. The simulation results can help to optimize the system's design and control strategies.

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