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Operation Manual 37107F
MFR 3 - Multi Function Relay
Page 82/165
© Woodward
Real Power Controller
Parameter
72
Power controller
ON
P controller
ON/OFF
ON
................ In a mains parallel operation, the real power is automatically con-
trolled at the configured set point (see page 73) when the real power
controller is enabled. The subsequent screens of this function are dis-
played.
OFF
.............. Control is disabled, and the subsequent screens of this function are
not displayed.
Set Point Ramp %/s
Parameter
73
Power controller
ramp 000 %/s
P controller: set point ramp %/s
0 to 100 %/s
The setpoint change is supplied to the controller via a percent per second ramp in
reference to the generator rated power (Parameter 28). The slope of the ramp is
used to alter the rate at which the controller modifies the set point value. The more
rapidly the change in the set point is to be carried out, the greater this value must
be.
Power Limitation
Parameter
74
Power limit
P max. 000%
P controller: real power limitation - maximum
10 to 120 %
If the maximum generator real power is to be limited, the desired limit of the gene-
rator rated power (Parameter 28) must be entered into this screen as a percentage.
The generator is controlled in such a manner that this value is not exceeded. The
value "P
max
" only limits the real power controller set point and has no effect in iso-
lated operation.
Parameter
75
Power limit
P min. 00%
P controller: real power limitation - minimum
0 to 50 %
If the minimum generator real power is to be limited, the desired limit of the gene-
rator rated power (Parameter 28) must be entered into this screen as a percentage.
The generator is controlled in such a manner that the generator real power does not
fall below this value. This parameter is not enabled during constant power control.