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DEGO III. Q-TAGG. ENGINE SPEED GOVERNOR . Space for picture. DEGO III - Main features. Very simple commissioning Cost effective The properties of DEGO II are retained Sturdy electric actuator = low maintenance Fuzzy control Diagnostics functions integrated

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engine speed governor

DEGO III

Q-TAGG

ENGINE SPEED GOVERNOR

Space for picture

dego iii main features
DEGO III - Main features
  • Very simple commissioning
  • Cost effective
  • The properties of DEGO II are retained
  • Sturdy electric actuator = low maintenance
  • Fuzzy control
  • Diagnostics functions integrated
  • Built-in instruction (user’s manual)
more features
More features
  • Customized from a normal PC in Windows format
  • Inter-active commissioning via the PC
  • Protocol on all settings can be printed out after commissioning
  • The governor set-up is easily tested against a realistic simulator program before engine start up
propulsion governor features
Propulsion governor features
  • The control algorithm is automatically adopted to the actual running condition
  • Back-up control bypassing the governor in fixed propeller applications
  • Excellent load sharing in multi-engine applications
  • The parameters for most slow speed engines are stored in the programming aid
generator governor features
Generator governor- features
  • Three modes of operation:
  • - Speed droop
  • - Isochronous
  • - Load control
  • Program for smooth start-up
  • Synchronizing integrated
  • Power measurement integrated
low frequency torsional oscillations
Low Frequency Torsional Oscillations

If the shaft system has a resonance that is in a frequency range that the governor can respond to, the governor can amplify the torsional oscillation

A misfiring can excite the torsional oscillation

In severe cases the torque is changing sign also at load

(gives gear hammering)

The governor gain setting for stability is extremely low

Installation of one pickup on each side of the elastic

coupling may be efficient

If a Multi Channel Tacho (MCT) is installed, we can

guarantee that the governor not is making the situation worse

'

suppression of torsional oscil lations with the mct funtion
Suppression of torsional oscil-lations with the MCT funtion

Governorelectronics with Multi Channel Tacho functions

F

A

SPEED

U

V

E

F

R

U

ALTERNATOR

OR

GEARBOX

ELASTIC COUPLING

arrangement for diesel electric propulsion
Arrangement for Diesel-Electric propulsion

NOT ABB SUPPLY

SUPERIOR

C/R

MSB

PANEL

CONTROL

PANEL

GOVERNOR CUBICLE

TERMINALS

QHFD 552

POWER AMPLIFIER

CONTROLLER

SPEED TRIMMER

FUEL SET

TERMINALS

UNIT SUPPLY 24 VDC

INTERCONNECTION

ACTUATOR

48 VDC

24 VDC BATT.

HARMONICS FILTER

3x400 VAC

TERMINALS

SUPPLY

UNIT

MSB

TRANSFORMERS

CIRCUIT

VT

PICKUPS

BREAKER

CT

GENERATOR

DIESEL ENGINE

features in speed droop mode
Features in Speed Droop mode

Same characteristics as for hydraulic governors

The frequency is load dependant (static) and fluctuating

with load variations (no feed forward)

Difficult to maintain load sharing at loss of load

Loading up and loading down is manual

Utilised to arrange smooth load up and load down

No signals from the switchboard are required

features in isochronous mode
Features in Isochronous mode

The frequency is always nominal (50 Hz)

Equal load sharing also at low load

The load sharing and the frequency is maintained

also at large load changes

The load sharing is based on electric power

Used when the station busbar is isolated

The frequency is independent from load variations

load rejection
Load rejection

Without feed forward

Withfeed forward

features in load control mode
Features in Load Control mode

The governor is converted to a "power regulator"

The load is independent from frequency variations

The desired power level is easily preset

The fuel rack is completely steady

Requires minimum one unit connected to the busbar in frequency control (electric interlock needed)

Utilised to arrange smooth load up and load down

loading up down sequence
Loading up/down sequence

FIX LEVEL

AVERAGE LOAD

BREAKING

POINTS

START LEVEL

LOAD CONTROL

CIRCUIT BREAKER

ORDER UNLOAD

BREAKER TRIP

choose the right pick up location
Choose the right pick-up location

Correct pick-up location

Shaft bearing

Engine

Correct pick-up location

This location gives problems

Tank top