What is the voltage instability of Yuchai diesel generator?

There will be various uncertainties in the operation of Yuchai diesel generator. What is the voltage instability of diesel generator?

1. The speed of the diesel generator set will increase after observing whether the voltage and frequency are stable. With the increase of the speed, the voltage and frequency fluctuate greatly, but the diesel engine tends to be stable and the soot emission is light gray, which indicates that the diesel engine works normally and faults may occur in the control box and exciter.

2. Use a multimeter to measure the exciter and all related circuits, and it is abnormal.

3. Adjust the stability of AVR control board and cannot delete more information of diesel generator set. Please pay attention

4. After the generator is shut down, charge it with 6V battery. The starting speed of the diesel engine is 750 R / min. the generator starts to boost voltage, and the fluctuation range of voltage and frequency meets the technical requirements of the generator set.

5. Start the diesel engine after flameout, observe the response of the frequency and voltage of the generator, and find that the frequency and voltage of the generator are unstable.

6. After shutdown, the starting speed of the diesel engine is increased (increasing the oil supply of the governor). When the generator frequency and voltage are stable, the diesel engine is restarted to about 800 R / min. However, when the control handle is reduced to start the diesel engine, the frequency and voltage of the generator are unstable. After repeated tests, it is concluded that the starting speed of diesel generator set must be in the range of 750 ~ 800 R / min to generate electricity, and the fluctuation range of voltage and frequency meets the requirements.