Fimer PVS-100-TL - Power Derating

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3.7 Power derating
In order to allow inverter operation in safe thermal and electrical conditions, the unit automatically reduces the value of the power fed into
the grid.
Power derating may occur due to:
• Adverse environmental conditions (thermal derating)
• Percentage of output power (value set by the user)
• Grid voltage over frequency (mode set by user)
• Grid overvoltage U>10min Der. (enabling carried out by user)
• Anti-islanding
• Grid under voltage
• Input voltage values too high.
• High input current values.
3.7.1 Power derating due to environmental conditions
The power reduction value and the inverter temperature at which it occurs depend on the ambient temperature and on many operating
parameters. Example: input voltage, grid voltage and power available from the photovoltaic field.
The inverter can therefore reduce the power during certain periods of the day according to the value of these parameters. The graph
shown below the power reduction in relation to the ambient temperature at the nominal input voltage.
-30
-22
-20
-4
-10
14
0
32
10
50
20
68
30
86
40
104
50
122
60
140
70
158
60
40
20
0
80
100
120
160
140
180
200
220
Ambient temperature (°C / °F)
Output power (kW)
PVS-100 PVS-120
80 kW
100 kW
12.5 kW
100 kW
120 kW
3.7.2 Power derating due to the input voltage
The power reduction occurred for too high or too low DC input voltage values is adjusted automatically.
NOTE – D Power reduction behaviour is guaranteed only in case of balanced input channels.
300 400 500 600 700 800 900 1000 1100 1200
1300
30
20
10
0
40
50
60
80
70
90
100
110
120
130
Input voltage (Vdc)
Output power (kW)
PVS-100 PVS-120