ID
Parameter
Setting range
[Default]
Description
Note: Input 0.0s disables the filter
influence.
1899
Q(V) limit setpoint filter
0 to 99.9 s
[10.0 s]
The PT1-filter for the reactive
power characteristic Q(V) limit can
be configured here. The
parameter stands for the 3 times
tau value of a PT1 element. (see
drawing). That means the
configured time defines when 95%
of the original setpoint jump is
reached.
Note: Input 0.0s disables the filter
influence.
4.4.4.2.5
Reactive Power Characteristic
4.4.4.2.5.1 Reactive power Q(V)
General notes
This feature is related to the VDE-AR-N 4110 / 4105 grid code. For BDEW related grid
code please refer to
╚═▷ “4.4.4.2 Power Factor Control”
.
The FNN VDE-AR-N 4105 / 4110 requests different methods for reactive power control
during mains faults to stabilize the mains.
This method determines a reactive power setpoint deviation based on the mains voltage
deviation from a rated mains voltage value.
The slope follows the formula:
Slope(QV) =
(Qmax
/
Pinst.)
(Vmax / Vc) - (VQ0
/
Vc)
The formula contains a factor which can shift the curve on the voltage axis. The shift itself
can be determined through an analog value “VQ0”. This gives the network provider the
capability to change the reactive power influence remotely.
Function
This procedure of running different reactive power values over the voltage is based on
two points:
Point 1 is defined as the reference voltage on which the reactive power shall be zero.
Point 2 is defined through the value pair (Vmax/VC ; Qmax/Pinst.). This point defines
finally the maximal reactive power, which is allowed to run for the generator. It is valid for
leading and lagging reactive power (Under-excitation/Over-excitation).
So if mains voltage exceeds the Vmax/VC point inductive power is absorbed and with
surpassed Vmax/VC inductive reactive power is delivered to mains.
318
easYgen-3000XT Series
B37574
4 Configuration
4.4.4.2.5 Reactive Power Characteristic
Released