Activating The Manual Resume Mode; Setting The Grid Support; Setting Full And Limited Dynamic Grid Support (Frt); Setting Enable Islanding Detection - SMA SUNNY CENTRAL 500CP XT User Manual

4 Commissioning
4.6.7.3

Activating the Manual Resume Mode

If the inverter is switched off due to a grid limit infringement, you can prevent an automatic restart of the inverter. Only
once the error has been acknowledged will the inverter switch back on. You can activate the Manual Resume Mode
for individual errors of grid limit infringement. You can read off the reason for the current restart block in the
instantaneous value ManResStt.
Procedure:
1. Call up the parameter overview (see Section 9.3.1, page 78).
2. To activate the Manual Resume Mode for individual disturbances, set the desired parameters to On:
Manual Resume Mode after
Disconnection due to overvoltage
Disconnection due to undervoltage
Disconnection due to overfrequency
Disconnection due to underfrequency
Disconnection due to passive islanding detection
Disconnection due to disturbance in a line conductor
3. Save the parameter changes (see Section 9.3.2, page 78).
4.6.8

Setting the Grid Support

4.6.8.1

Setting Full and Limited Dynamic Grid Support (FRT)

1. Call up the parameter overview (see Section 9.3.1, page 78).
2. Set dynamic grid support with the parameter FRTEna.
3. Set operating mode for dynamic grid support with the parameter FRTMod.
4. Set deactivation delay for LVRT with the parameter FRTSwOffTm.
5. Set the scaling of the k factor for LVRT with the parameter FRTArGraNom.
6. Set the upper limit of the voltage deadband with the parameter FRTDbVolNomMax.
7. Set the lower limit of the voltage deadband with the parameter FRTDbVolNomMin.
8. In operating mode FRT_SDLWindV, set the gradient for the FRT characteristic curve in case of overvoltage with the
parameter FRT2ArGraNomHi.
9. For the operating mode FRT_SDLWindV, set the gradient for the FRT characteristic curve in case of undervoltage
with the parameter FRT2ArGraNomLo.
10. Save the parameter changes (see Section 9.3.2, page 78).
4.6.8.2

Setting Enable Islanding Detection

1. Call up the parameter overview (see Section 9.3.1, page 78).
2. Set the islanding detection with the parameter EnaAid.
3. Save the parameter changes (see Section 9.3.2, page 78).
4.6.8.3

Setting the Medium Voltage

The line-to-line voltage of the overvoltage side of the MV transformer (parameter TrfVolExlHi) has to be adapted to
the nominal conductor voltage of the utility grid (parameter VRtg). It is important that the transmission ratio of the
external MV transformer is adjusted at the same time. The undervoltage side is already preset for the specific device.
40 SCCPXT-E7-BA-en-58
SMA Solar Technology AG
Parameter
ManResOvrVol
ManResUndrVol
ManResOvrFrq
ManResUndrFrq
ManResPID
ManResPLD
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