Setting Grid Monitoring And Grid Limits; Setting Grid Voltage Monitoring; Setting Power Frequency Monitoring - SMA SUNNY CENTRAL 500CP XT User Manual

SMA Solar Technology AG
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 9.3.1, page 78).
3. Set the parameter QoDQ-VarMod to the desired value.
4. Change the parameters belonging to the selected mode (see Section 10.3.4, page 102).
5. Use the parameter PwrMonErrMod to select the desired behavior in the absence of setpoint specifications as
follows (see Section 10.3.5, page 107).
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 9.3.2, page 78).
4.6.7

Setting Grid Monitoring and Grid Limits

4.6.7.1

Setting Grid Voltage Monitoring

Consultation prior to parameter change
The parameters of this mode can only be selected or changed after consultation (see Section 13 "Contact",
page 153).
Procedure:
1. Call up the parameter overview (see Section 9.3.1, page 78).
2. Set the parameters for monitoring the grid voltage (see Section 10.1.3.1, page 81).
3. Save the parameter changes (see Section 9.3.2, page 78).
4.6.7.2

Setting Power Frequency Monitoring

Consultation prior to parameter change
The parameters of this mode can only be selected or changed after consultation (see Section 13 "Contact",
page 153).
Procedure:
1. Call up the parameter overview (see Section 9.3.1, page 78).
2. Set the parameters for monitoring the power frequency (see Section 10.1.3.2, page 82).
3. Save the parameter changes (see Section 9.3.2, page 78).
User Manual
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