8 Power Control
SMA Solar Technology AG
54
SCCP-JP-BA-A4-en-12
User Manual
Procedure:
1. Ensure that the Sunny Central is in the operating state "Stop".
2. Log into the user interface.
3. Change the parameter
Q-VarMod
4. Change any parameters associated with the selected mode.
5. Use the parameter
PwrMonErrMod
to select the desired inverter behavior in the absence of setpoint specifications
as follows:
6. If
SubVal
has been selected, enter the proxy values for normal feed-in operation and for operation outside of normal
feed-in operation, as follows:
7. In the parameter
PwrMonErrTm
configure the time lapse until recognition of the absence of setpoint specifications.
8. Confirm the parameter entry with [
Save
].
8.2.1.2 No Reactive Power Control: Off Mode
The reactive power setpoint is limited to 0 kVAr. This setpoint cannot be controlled.
PFCnstAnIn
The reactive power setpoint is imported via the analog input for setpoint specification. The analog
value is converted into a displacement power factor cos φ.
PFCtlW
The displacement power factor cos φ is set as a function of the feed-in power. The dependency is
depicted by a configurable characteristic curve.
VArCtlVol
The reactive power is set as a function of the line voltage.
VArCtlVolHystDb
The provision of reactive power helps perform voltage-stabilizing measures in the event of
overvoltage or undervoltage. The parameterization is carried out by means of a reactive
power/voltage characteristic curve.
VArCtlVolHysDbA The provision of reactive power helps perform voltage-stabilizing measures in the event of
overvoltage or undervoltage. The parameterization is carried out by means of a reactive
power/voltage characteristic curve and an activation power.
Parameter block
The parameter
Q-VARMod
can only be changed in the operating state "Stop". The entry will not be accepted in
any other operating state.
Setting
Description
LastVal
If specified via communication: utilization of the last value received. In case of analog
setpoints: utilization of the last valid mean value.
SubVal
Utilization of the configured proxy values. SMA recommends use of the proxy values when
setpoint specifications are effected via analog signals.
Parameters
Description
Q-VArSubValRun
Proxy value for the reactive power setpoint in feed-in operation
PF-PFSubValRun
Proxy value for the displacement power factor in feed-in operation
PF-PFExtSubValR
Proxy value for the excitation of the displacement power factor in feed-in operation
Q-VArSubVal
Proxy value for the reactive power setpoint outside of feed-in operation
PF-PFSubVal
Proxy value for the displacement power factor outside of feed-in operation
PF-PFExtSubVal
Proxy value for the excitation of the displacement power factor outside of feed-in operation
Mode
Description