08/08/2024
Functions of an AVR in a Diesel Generator
1. Voltage Regulation:
The AVR continuously monitors the output voltage of the generator.
It compares the actual voltage with a preset reference value.
If there is any deviation, the AVR adjusts the excitation current to the generator’s rotor, thereby stabilizing the output voltage
2. Load Adjustment:
When the load on the generator changes, the AVR adjusts the excitation to maintain a constant voltage.
This is essential for preventing voltage drops or spikes that could damage sensitive equipment.
3. Protection:
The AVR protects the generator from over-voltage and under-voltage conditions.
It can also help in protecting the generator from overheating by reducing the excitation if the generator’s temperature rises.
4. Excitation Control:
The AVR controls the excitation system of the generator, which is responsible for producing the magnetic field in the rotor.
By adjusting the excitation, the AVR ensures that the generator produces the correct voltage output.
Importance of an AVR
a) Stability: Ensures stable voltage output, which is critical for the safe operation of electrical equipment.
b) Efficiency: Helps in maintaining the efficiency of the generator by optimizing the excitation.
c) Protection: Provides protection against voltage fluctuations, which can damage both the generator and the connected equipment.
Understanding the role of an AVR can help you troubleshoot issues related to voltage instability in diesel generators