Dear all!
I have 2 questions:

1) Does anyone know about "Voltage Balance Meter" range between -15V~0~+15V Analog dial type inside Diesel Generator Control Alarm Panel and what is the purpose of installing that meter. For information we have 2 unit of diesel generator running in parallel and we have 2 unit of this inside each panel

2) Why our Woodward Governor for freq control do not have isochronous mode and only using droop mode? Our system have 2 5MW diesel engine using as a stand alone unit (local use)and not tie to the grid.

Thanks for all opinion and explanation.

Regards:
Azman Shari

 

Hi Azman,
The function of "Voltage Balance Meter" is to maintain the output terminal voltage of the generator. When the generator is started & the excitation is switched "ON", then the output terminal voltage of the generator is zero, which is then increased through the AVR in manual mode till it reaches the preset value (the rated value of the voltage).

The function of this "Voltage Balance Meter" is to compare the actual terminal voltage of the generator (scaled down to the range of 0-15 V) with the reference value (the rated value scaled down to the range of 0-15 V). Hope this clarifies the first query.

For generators to operate in parallel it is the normal practice that the governors have droop characteristics.