11 Appendix IV: Power Response User Manual
100
11.2.5 Frq-watt Response
Press to select Frq-watt and Press ENT to confirm.
Active Power
Volt-watt
Frq-watt
Volt-watt (Chrg)
The variation of the active power generated by the
system will take place for exceeding of the threshold
values in the over-frequency adjustable between 50
and 52 Hz (default of 50.2 Hz).
The variation of the active power absorbed by the
system will take place for exceeding of the threshold
values in the under-frequency adjustable between 47
and 50 Hz (default of 49.8 Hz).
The power control of function active for transient
over- and under-frequency has an activation delay
can be set from 0 to 1s with 50 ms steps (default of
0.20 s).
The quadrilateral in the following figure shows the active power control in the
conditions of over- and under-frequency. The area included in the central
rectangular zone defines the possible points of normal operation in which the
storage system may be at work and from these points the system will have to
change its active power and move to the vertices of the quadrilateral according to
the thresholds of over- or under-frequency (see dashed lines).
48.5 48.8 49.1 49.4 49.7 50.0
50.3 50.6 50.9 51.2 51.5
51.8
P [W]
f [Hz]
Under-frequency
response
Over-frequency
response
P
smax
P
cmax
Fig. 11-6 Control of Active Power in Conditions of Over- and under-frequency
* P
smax
: the maximum discharge power; P
cmax
: the maximum charge power
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