6.5.7.4
Setting Reactive Power Control
Operation failure of the PV power plant due to incorrectly set parameters
If the parameter settings for grid management services are incorrect, the PV power plant may not be able to meet the
requirements of the grid operator. This can involve yield losses and the inverter may have to be disconnected by the
grid operator.
• When setting the modes of grid management services, ensure that the control procedures agreed with the grid
operator are parameterized.
• If the inverter is operated with a Power Plant Controller, ensure that the mode
WCtlCom
for active power
limitation and the mode
VArCtlCom
for reactive power control are selected in the inverter.
Avoiding electromagnetic interference emissions in large-scale PV systems
To avoid electromagnetic interference emissions in large-scale PV systems at the changeover from night mode to
feed-in operation, it is recommended using Modbus communication for setpoint in feed-in operation and night
mode.
For smaller-sized PV systems without farm control, the use of fixed setpoints for reactive power control is
recommended.
Validity of parameters in feed-in operation and in "Q at Night" operation
The parameters used for these substitute values are valid in feed-in operation and in "Q at Night" operation.
• Ensure that the settings of the parameters for the substitute values meet the requirements for feed-in operation
and "Q at Night" operation.
Procedure:
1. Make sure the inverter is in the operating state "Stop".
2. Call up the parameter overview (see Section 12.8.3, page 178).
3. Set the parameter
Q-VArMod
to the desired value.
4. Change the parameters belonging to the selected mode (see Section 13.3.3, page 192).
5. Use the parameter
PwrMonErrMod
to select the desired behavior in the absence of setpoint specifications as
follows (see Section 13.3.5, page 206).
6. If
SubVal
has been selected, enter the substitute values for normal feed-in operation and for operation outside of
normal feed-in operation.
7. In the parameter
PwrMonErrTm
configure the time lapse until recognition of the absence of setpoint
specifications.
8. Save the parameter changes (see Section 12.8.4, page 178).
6.5.7.5
Setting Q at Night
Operation failure of the PV power plant due to incorrectly set parameters
If the parameter settings for grid management services are incorrect, the PV power plant may not be able to meet the
requirements of the grid operator. This can involve yield losses and the inverter may have to be disconnected by the
grid operator.
• When setting the modes of grid management services, ensure that the control procedures agreed with the grid
operator are parameterized.
• If the inverter is operated with a Power Plant Controller, ensure that the mode
WCtlCom
for active power
limitation and the mode
VArCtlCom
for reactive power control are selected in the inverter.
6 Commissioning
SMA Solar Technology AG
System Manual
85
MVPS22JP-SH-en-11
Summary of Contents for 1000-1SC
Page 257: ......
