Pid Controller - Deif GPC-3 Designers Reference Handbook

GPC-3 DRH 4189340587 UK

6. PID controller

6.1 PID controller
The PID controller consists of a proportional regulator, an integral regulator and a differential regulator. The
PID controller is able to eliminate the regulation deviation and can easily be tuned in.
For details about tuning the controllers, refer to the document "General Guidelines for Com-
missioning".
There are three controllers for the governor control and, if option D1 is selected, also three controllers for the
AVR control.
Controller
Frequency sync.
Frequency
Power
P load sharing
Voltage (option D1)
Reactive power (option D1)
Q load sharing (option D1)
The tables below indicate when each of the controllers is active. This means that the controllers can be tuned
in when the shown running situations are present.
Governor
Frequency Power
χ
The drawing below shows the basic principle of the PID controller.
DEIF A/S
GOV AVR Comment
χ Controls the frequency during synchronisation (GB OFF)
χ Controls the frequency and frequency droop
χ Controls the power in fixed power and during ramp up/down
χ Controls the active power load sharing
χ Controls the voltage and voltage droop
χ Controls the power factor and reactive power
χ Controls the reactive power load sharing
AVR (option D1)
P LS Voltage
χ
χ
Schematic
var Q LS
G
G
χ
G
PID controller
GB
GB
GB
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