SMA SC 500CP-US-10 600V User Manual
Page 64
8 Reactive Power Control
SMA America, LLC
64
SCCP-US-BE-US_en-52
Operating Manual
In order to prevent several systems with this function from influencing each other, the Q-VArTmsVtg parameter can be
used to set a delay time. This delay time indicates for how long a voltage change must be pending before a change in
the reactive power supply results. This allows several systems to alternately control the line voltage at the grid connection
joint.
The Q-EnaTmsVtg parameter can be used to switch the delay time on and off.
8.2 Displaying Error Messages and Warnings for the Reactive Power
Setpoint
The instantaneous value Q-VArModFailStt displays errors or warnings relating to the reactive power setpoint.
Procedure: Display the instantaneous value Q-VArModFailStt on the user interface (see Section 6.1 "Displaying
Instantaneous Values", page 51).
Parameters used
Q-VolWidNom
Q-VolNomP1
Q-VolNomP2
Q-VArGraNom
Q-VArTmsSpnt
Q-VArTmsVtg
Q-EnaTmsVtg
Display
Cause and corrective measures
Off
No procedure for specifying the reactive power setpoint has been selected.
Ok
A procedure for specifying the reactive power setpoint has been selected and there are no errors.
ComFail
The VArCtlCom or PFCtlCom procedure has been chosen and the expected signal with a valid
reactive power setpoint has been absent for at least five minutes.
Corrective measures:
• Ensure that the inverter and the Power Plant Controller can be accessed via the Internet.
• Ensure that the inverter and the Power Plant Controller are connected correctly.
• Ensure that the cabling between the inverter and Power Plant Controller is OK.
AnInFail
The VArCnstNomAnIn or PFCnstNomAnIn procedure has been chosen and the value
measured at the analog input is less than 2 mA.
Corrective measures:
• Make sure the signal cable is correctly connected to the analog input.
ComInvalid
The VArCtlCom or PFCtlCom procedure has been chosen and the information on the power
specification settings contains invalid content.
Corrective measures:
• Check the power specification settings.