SMA SC 200 - Manual (Page 36)

Parameters SMA Solar Technology AG
36 SC-BEN100262 User Manual
HzCtlMinTm Triggering time for the minimum threshold values at underfrequency in Level 3.
Grid connection
GriGrdMonTm
This parameter defines the time span required to meet the switch-on conditions,
before the Sunny Central can be reconnected to the energy supply grid.
VCtlOpMinNom This parameter determines the minimum grid voltage, as a percentage of the
nominal voltage VRtg, which must be present at the Sunny Central for it to
reconnect to the energy supply grid.
VCtlOpMaxNom This parameter defines the maximum grid voltage, as a percentage of the
nominal voltage VRtg, which may be present at the Sunny Central for it to
reconnect to the energy supply grid
HzCtlOpMin This parameter determines the minimum grid frequency which must be present
at the Sunny Central for it to reconnect to the energy supply grid.
HzCtlOpMax This parameter defines the maximum grid frequency which may be present at
the Sunny Central for it to reconnect to the energy supply grid.
Mpp Limit Val.
VmppMin *
Minimum MPP voltage required for the Sunny Central to feed.
dVreference MPP tracking is possible within a range equal to 2 x dVreference. As soon as
the voltage breaches these voltage limits, the inverter changes to "MPP Search"
mode.
Default setting: 80 V
Recommendation for operation with thin-film modules: 120 V
PsearchMpp * If the currently measured PV power drops below the value PsearchMpp for the
duration of TsearchMpp, the Sunny Central restarts the search for the MPP.
TsearchMpp *
MPP Tracking
dVtrack *
During MPP tracking, the inverter changes the voltage in "dUtrack" steps at
"TcheckMpp" intervals before it selects the MPP.
TcheckMpp *
Mpp Factor
The start value for MPP tracking is obtained by multiplying the "Mpp Factor"
parameter by the measured open circuit voltage.
Factory setting: 0.80
Recommendation for operation with thin-film modules: 0.70
TrackCnt During operation, the Sunny Central searches the maximum power point. It
checks the voltage up to seven times (default setting) in one direction, e.g.
always toward the higher voltage. After the seventh time (at the latest), it also
searches below the last voltage, in order to check whether the maximum power
point has decreased. If, for example, the Sunny Central finds a lower power
point upon the third increase, it searches below the most recently checked
voltage.
Start requirement
Operating mode * MPP is set as a condition for starting up the inverter.
Parameters Description of function