When the diesel genset parallel with genset, the adjustment of the engine speed and the generator voltage can be controlled by parallel controller’s DC voltage output to distribute the genset power. The controlled voltage of GOV and AVR from different gensets are not same. It is important to set up the parallel controller GOV, AVR’s SW1 and SW2 to match up the genset in right way.
SW1 is also called center voltage, which is outputted by GOV and AVR interface of parallel controller. SW1 is adjustment voltage when the engine rotation speed and the generator voltage are standard values or rated values. There is the corresponding relationship of SW1 setting values and voltages:
For example: With the genset speed regulation plate is GAC5500 and center voltage is 4.5V, SW1 of controller GOV should be set as 9. With the genset voltage regulation plate is RS440 and center voltage is 0V, SW2 of controller AVR should be set as 0.
SW2 is also called adjusting range, which restricts the upper and lower limits of center voltage output to limit the adjustment range from parallel controller to the genset rotation speed and the voltage. There is the corresponding relationship of SW2 setting values and voltages:
For example: With SW2 of GOV and AVR is set as 0, the output voltage bias range values of GOV and AVR is±0.5V. When the center voltage of GOV is 4.5V, the adjusting output range of GOV is 4~5V. When the center voltage of AVR is 0V, the adjusting output range of AVR is -0.5~0.5V.