Energy Management of Grid-Connected Photovoltaic System With Battery: Maximizing Efficiency and Resilience

Grid-connected photovoltaic (PV) systems with batteries offer a promising solution to address the challenges of integrating intermittent renewable energy sources into the grid while ensuring reliable and cost-effective electricity supply. However, maximizing the efficiency and resilience of these systems requires effective energy management strategies.

System Design and Components

The design of a grid-connected PV system with battery involves careful consideration of system components and their integration. The primary components include:

Energy Management of Grid-connected Photovoltaic System with Battery-supercapacitor Hybrid Energy Storage System

by Konstantinos Mylonas

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Language	:	English
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• PV panels: Convert sunlight into electrical energy.
• Battery: Stores excess energy produced by the PV panels.
• Inverter: Converts DC power from the PV panels and battery into AC power compatible with the grid.
• Grid connection: Enables the system to export or import electricity to and from the grid.

Control Strategies

Energy management in grid-connected PV systems with batteries involves optimizing the flow of energy between the PV panels, battery, and grid. Various control strategies can be employed, including:

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• Maximum Power Point Tracking (MPPT): Adjusts the electrical load to extract maximum power from the PV panels.
• Battery Charging and Discharging Control: Determines when and how to charge and discharge the battery to optimize energy storage and minimize battery degradation.
• Grid Interaction Control: Manages the flow of energy between the system and the grid, including grid support functions such as voltage and frequency regulation.

Energy Storage Optimization

The effective use of battery storage is crucial for optimizing energy management in grid-connected PV systems. Key considerations include:

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• Battery Capacity: Determines the amount of energy that can be stored.
• Battery Discharge Rate: Limits the rate at which energy can be drawn from the battery.
• Battery Efficiency: Affects the amount of energy lost during charging and discharging.
• Battery Lifespan: Indicates the expected operating life of the battery.

By carefully selecting and managing these parameters, the energy storage system can be optimized to meet specific performance goals, such as maximizing self-consumption, reducing grid dependence, or providing backup power during outages.

Grid Integration

Grid integration is essential to ensure the seamless operation of grid-connected PV systems. The key aspects of grid integration include:

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• Connection Standards: Compliance with electrical codes and grid interconnection requirements.
• Power Quality: Maintaining stable voltage and frequency to avoid grid disturbances.
• Grid Support: Providing ancillary services such as voltage regulation and frequency support to enhance grid stability.

Energy Management of Grid-connected Photovoltaic System with Battery-supercapacitor Hybrid Energy Storage System

by Konstantinos Mylonas

4.4 out of 5

Language	:	English
File size	:	9047 KB
Text-to-Speech	:	Enabled
Screen Reader	:	Supported
Enhanced typesetting	:	Enabled
Print length	:	74 pages
Lending	:	Enabled

FREE