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

 Answer : The potentiometer of the generator voltage regulation board includes: VOL: voltage regulation; DROOP: reactive power regulation when paralleling; UF: low-frequency protection regulation; TRIM: reactive power regulation when paralleling; OVER EXC: overexcitation protection regulation; STAB: stable regulation

     A. 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.

     B. DROOP: Reactive power adjustment during parallel operation

     Function: adjust the current to compensate the voltage drop 

     C, UF: low frequency protection adjustment

     Function: play low frequency protection

     D. TRIM: Reactive power adjustment during parallel operation

     Function: 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.

     E. 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.

     F. STAB: stable adjustment

     Function: Adjust the stability. 

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