Governor Control

Your Goal

To understand Governor control system design and maintenance practices for Woodward UG8 Hydraulic system, and 2301 Electronic governors.

Governor Oil Specifications

• Use oils which have a high viscosity index.

• If oil temperature in the governor 180F, use S.A.E 40

• If oil temperature above 180F, use S.A.E 50

• Engine oil can be used if it meets these requirements.

Compensation Adjustment

After the temperature of the engine and the oil in the governor have reached their normal operating values, you can make compensation process without loading the engine.

.

Compensation Adjustment1. Loosen the nut holding the

compensation adjusting pointer and set the pointer at maximum position.

2. Remove the plug and open (unscrew) compensating needle valve three or more turns with a screwdriver.

3. Wait engine to hunt or serge for half a minute

Compensation Adjustment4. Loosen the nut holding the

compensation adjusting pointer and set the pointer at the lowest position.

5. Gradually close the needle valve until hunting just stops. Don’t go beyond this position.

6. Check the amount left to fully close the needle valve. 1/8 – ¼ turn open makes a satisfactory adjustment.

7. If hunting did not stop, raise the compensation pointer two divisions of the scale,

8. Open the needle valve again and repeat the cycle.

WOODWARD UG8 OIL CHANGES

• Oil should be clean and free of foreign particles.

• Under favorable conditions, the oil may be used for approximately six months without changing.

What is synchronization?

The matching of the output voltage wave form of one alternating current generator with the voltage wave form of another alternating current electrical system.

Synchronization of Engine Generator Systems

For two systems to be synchronized, five conditions must be matched:

1. The number of phases in each system.2. The direction of rotation of these phases.3. The voltage amplitudes of the two systems.4. The frequencies of the two systems.5. The phase angle of the voltage of the two

systems.

Parallel Operation of Alternators

speed

Load 100%

100%

A

50%

Load

0 100%

speed

57

60

63

With droop the speed decreases with load

DROOP SYSTEM

Parallel Operation of Alternators

speed

Load 100%

100%

A

BC

50%

4%

Parallel Operation of Alternators

speed

Load100%

100%

50%25% 75%

A

B

F1F2F3

Droop / Isochronous

If multiple generator sets operate in parallel in an isolated system, operate only one generator in an isochronous and all other generators in a droop mode.

The Isochronus generator is a swing unit

2301 Electric Governor

Parallel lines

2301 Load sharing & speed control

ENGINEGEN

Bus

Actuator

DC Power 20 – 40 V DC

Magnetic Pickup

3 ph

PT

3 PH

CT

2301 Load Sharing Control Box