Download Siemens 600Series Operating instructions

Grid management
4.2 Static grid support
3. Frequency derating with hysteresis and without start frequency
Figure 4-8
Active power control according to frequency P=f(f) with hysteresis and start
frequency
Contrary to active power control according to frequency P=f(f) with hysteresis and start
frequency, the second limit frequency f2 is not required. The inverter generally no longer
follows the curve in the case of frequency derating, and instead remains at the minimum
calculated output power P (determined via the curve) until the final frequency for
resuming normal operation f3 (parameterizable) has been undershot.
Only one mode is parameterized for frequency-dependent active power reduction. You set
all parameters here, regardless of which mode is used.
Parameterization of a minimum holding power
A minimum holding power can be parameterized additionally for modes 1 and 3. Some
Grid Codes demand this. If this function is activated, the inverter will not reduce the output
power below the parameterized holding power. If the frequency f nevertheless continues to
rise, the inverter will be switched off when the frequency point fH is reached.
Note
The functions can be deactivated if required.
PVS 600Series
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Operating Instructions, 08/2014, A5E03467293-003