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Improper parameter configuration may affect the normal operation of the MV
Station!
Only authorized personnel can configure these parameters.
Should any question or doubt occurs, contact Sungrow.
10.5 Low Voltage Ride Through (LVRT)
Technical Requirements for Connecting Photovoltaic Power Station to Power System
requires medium-and-large PV plant should be equipped with Low Voltage Ride Through (-
LVRT) ability.
LVRT requires: PV plant can operate normally within certain voltage drop range and
duration when the voltage of the grid-connected point drops due to the power system failure
or disturbance; PV plant can provide the dynamic reactive power support during the period.
Active Power Recovery
If the power station still connects to the grid during power system failure, the active power
will recover from the moment the fault is removed at the speed of at least 30% nominal
power/second.
Dynamic Reactive Current Support
During LVRT, power station should feed reactive current to the power system as per
requirements. For a station whose 500kV or 750kV voltage is stepped up from the 220kV or
330kV voltage and then connects to the power station group, it should feed reactive current
to the grid when a short-circuit occurs and the voltage drops.
Zero Voltage Ride Through
When the grid-connection point voltage drops to zero, power station can operation normally
for 0.25 second.
Note: U
T
is the grid-connection point voltage; Upu is the grid-connection point nominal
voltage.
figure 10-2
Lower voltage withstand requirements
Note: T1, T2, U1, and U2 are all settable parameters.
Sungrow’s MV Station meets the abovementioned requirements.
System Manual
