AVR panel also known as an Automatic Voltage Regulator panel, is a control system that regulates the voltage output of an alternator or generator. It ensures a stable and consistent voltage supply to electrical equipment, even when there are fluctuations in the input power source.
Key Components of an AVR Panel:–
* AVR Module: The core component that monitors the output voltage and adjusts the excitation current to the alternator’s field winding. This adjustment regulates the voltage output.
* Control Circuitry: This circuitry processes the voltage feedback signal from the AVR module and generates the appropriate control signals to adjust the excitation current.
* Power Supply: Provides the necessary power to operate the AVR module and control circuitry.
* Metering: Displays the voltage, current, and other relevant parameters for monitoring the system’s performance.
* Protection Relays: Safeguard the system against over voltage, under voltage, over current, and other potential faults.
How an AVR Panel Works:
* Voltage Sensing: The AVR module continuously monitors the output voltage of the alternator.
* Voltage Comparison: The sensed voltage is compared to a reference voltage.
* Excitation Control: If there’s a deviation from the reference voltage, the control circuitry adjusts the excitation current to the alternator’s field winding.
* Voltage Regulation: The adjusted excitation current alters the magnetic field strength in the alternator, which in turn regulates the output voltage.
Benefits of Using an AVR Panel: –
* Stable Voltage Supply: Ensures consistent voltage to electrical equipment, preventing damage and malfunctions.
* Improved Power Quality: Reduces voltage fluctuations and harmonics, leading to better overall power quality.
* Increased Equipment Lifespan: Stable voltage prolongs the life of electrical equipment.
* Enhanced System Efficiency: Optimal voltage levels improve the efficiency of electrical systems.
Applications of AVR Panels:-
* Diesel Generator Sets (DG Sets): Provides stable power in remote areas or during power outages.
* Hydropower Plants: Regulates voltage output from hydro turbines.
* Wind Power Plants: Maintains voltage stability in wind turbines.
* Industrial Power Systems: Ensures reliable power supply for critical equipment in factories and industries.1