The adjustment and function of each potentiometer of the generator voltage regulating board?

The potentiometer of the generator voltage regulation board includes:

  1. VOL: Voltage regulation

         Function: If the voltage adjustment does not match the output voltage, turn the voltage adjustment potentiometer clockwise to increase the output voltage; otherwise, the opposite is true.

  2. DROOP: Reactive power adjustment during parallel operation

         Function: adjust the current to compensate the voltage drop 

  3. UF: low frequency protection adjustment

         Function: play low frequency protection

  4. TRIM: Reactive power adjustment during parallel operation

         Function: Optimize voltage correction sensitivity.

  5. OVER EXC: Over-excitation protection adjustment

         Function: Over-current de-excitation makes the generator under rated power, rotate the excitation trip potentiometer counterclockwise to make the indicator diode light up, and then rotate clockwise about 5 degrees.

  6. STAB: stable adjustment

         Function: Adjust the stability. 

Optimize voltage correction sensitivity

  1. Adjust the excitation current according to the change of the generator load to maintain the terminal voltage as a given value.
  2. Control the reactive power distribution among the generators in parallel operation.
  3. Improve the static stability of parallel operation of generators.
  4. Improve the transient stability of parallel operation of generators.
  5. When a fault occurs inside the generator, demagnetize to reduce the degree of fault loss.
  6. Implement the maximum excitation limit and the minimum excitation limit for the generator according to the operation requirements.
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