Sungrow SG30KU, Руководство пользователя

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2 Product Introduction User Manual
12
2.3.3 Derating
Derating the output power is a way to protect the inverter from overload and
potential faults. Inverter’s derating function can be activated in the following
scenarios:
y
PV input overload
y
Grid voltage too low
y
Temperature too high (Inner temperature and power modules temperature)
y
Power limit setting on the inverter LCD display or remote dispatch
PV Overload Derating
When the PV input power exceeds the defined Max DC Input Power, the inverter will
reduce the power evenly to the maximum limit and keep the output power at
nominal value.
Fig. 2-6 PV Overload Derating
Power Limit Setting
User may allocate output power value of the inverter via LCD control panel or the
remote dispatch from the grid company. Under this kind of power derating, the
operating states will display on the LCD screen.
Over-temperature Derating
Power modules over-temperature may result from high ambient temperature, poor
ventilation or fault of fans. Over-temperature derating may protect the inverter as
well as the power modules against damage.
y
When the modules temperature exceeds an upper limit, the inverter start to
gradually derating until the temperature decreases to normal range.