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Grid connected PV battery with Non linear Load in MATLAB

Grid connected PV battery with Non linear Load in MATLAB


We examined a photovoltaic (PV) battery system designed to provide an uninterrupted power supply. The system consists of various components including a PV array, boost converter, battery, DC-DC converter, inverter, and AC load, among others. Let's delve into the details of each component and its role in ensuring a steady power supply.


  1. PV Array:

  • Rated at 4.6 kW and generating a peak current of around 164 amps.

  • Controlled by a boost converter utilizing P and MPPT control to extract maximum power from the PV.

  1. Battery:

  • Voltage: 240 volts with an initial state of charge of 50%.

  • Connected via a DC-DC converter and controlled to maintain stability using a voltage reference and controller.

  1. Inverter:

  • Converts DC power from the PV and battery into AC power for the load.

  • Includes filtering components such as inductors and capacitors to ensure smooth AC output.

  1. AC Load:

  • Consists of three types of loads, with varying power requirements over time.

  • Load variations are managed to maintain system stability and efficiency.

  1. Control System:

  • Utilizes controllers to manage power flow between the PV, battery, and grid.

  • Implements algorithms to optimize power generation and distribution based on system parameters and load requirements.


Analysis of System Operation:

  • Initially, the PV supplies power to the load, with the grid providing supplementary power as needed.

  • As PV power increases, the battery enters charging mode to store excess energy.

  • Load variations are accommodated by adjusting power distribution between the PV, battery, and grid.

  • The system maintains stability and ensures uninterrupted power supply by dynamically adjusting power flow based on real-time conditions.


Conclusion: The PV battery system demonstrates effective utilization of renewable energy sources to provide uninterrupted power supply. Through efficient control and management of power flow, the system optimizes energy utilization and enhances overall reliability. This analysis highlights the significance of integrated renewable energy systems in meeting the growing demand for sustainable power solutions.

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