26 Program features
P(f) limitation curve based on Italy MV grid code
This is an example of an incremental P(f) limitation.
When 130.63 P(f) corner frequency is crossed, a timer is started to hold off and keep the
P(f) feature inactive for the time set in parameter 130.69 P(f) activation delay. After the
delay time, the P(f) limitation ramp is applied. The gradient of the ramp is determined by
parameter 130.64 P(f) limit gradient and the magnitude of the instantaneous power when
the delay time elapsed. The actual power limit, as controlled by the gradient, can only
move towards lower values as frequency increases. It stays at its current lowest value as
long as the frequency remains above the corner frequency defined in parameter 130.63
P(f) corner frequency. As the frequency decreases and passes through the corner
frequency, a release delay is started. The 130.66 P(f) release time must elapse before the
power limit is ramped up with 130.67 P(f) release ramp in relation to the nominal power.
Settings
130.62 P(f) limit type
130.63 P(f) corner frequency
130.64 P(f) limit gradient
130.66 P(f) release time
130.67 P(f) release ramp
130.69 P(f) activation delay
Plim/%
Power at the time of
exceeding corner point
130.63 P(f) corner frequency
130.66 P(f) release time
130.67 P(f) release ramp
f/Hz
130
.
64 P(f) li
m
it g
r
adient
130.62 P(f) limit type = Incremental
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