Setting Time-Dependent Two-Level Load Shedding - SMA SUNNY ISLAND 3.0M Installation Manual

8 Commissioning
8.3.5

Setting Time-Dependent Two-Level Load Shedding

The time-dependent load shedding divides the day into two time periods (see Section 9.3 "Setting Time-Dependent
Functions", page 100). You set the SOC thresholds that apply for each time period for two-level load shedding.
For example, you can set that as far as possible no loads are to be disconnected from the utility grid during the day.
Significance of the SOC thresholds:
Two lower and two upper SOC thresholds are available for each time period for controlling the load-shedding
contactors. The load-shedding contactors disconnect the loads from the utility grid if the states of charge are as follows:
• When the state of charge of the battery reaches the first lower SOC threshold, the multifunction relay opens the
connected load-shedding contactor for the first level of load shedding. The load-shedding contactor disconnects
those loads from the utility grid that are to be disconnected for the first level.
• When the state of charge of the battery reaches the second lower SOC threshold, the multifunction relay opens the
connected load-shedding contactor for the second level of load shedding. The load-shedding contactor disconnects
the remaining loads from the utility grid.
• When the state of charge of the battery reaches the second upper SOC threshold during recharging, the
multifunction relay closes the connected load-shedding contactor for the second level of load shedding.
The load-shedding contactor connects those loads to the utility grid that were disconnected for the second level .
• When the state of charge of the battery reaches the first upper SOC threshold during recharging, the multifunction
relay closes the connected load-shedding contactor for the first level of load shedding. The load-shedding contactor
connects those loads to the utility grid that were disconnected for the first level. All loads are now reconnected to the
utility grid.
Requirement:
☐ In a cluster, the communication product or Sunny Remote Control must be connected to the master.
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
2. Select the parameter Time load shedding 1 / 242.05 Lod1Tm1Str and set to the start time for the standard time
period.
3. Select the parameter Start time for the additional time period of load shedding 1 / 242.06 Lod1Tm2Str
and set to the start time for the additional time period.
4. Set the SOC threshold for the standard time period:
• Select the parameter Battery state of charge limit for load shedding 1 start / 242.01 Lod1SocTm1Str
and set it to the lower SOC threshold for the first level of load shedding.
• Select the parameter Battery state of charge limit for load shedding 1 stop / 242.02 Lod1SocTm1Stp
and set it to the upper SOC threshold for the first level of load shedding.
• Select the parameter Battery state of charge limit for load shedding 2 start / 242.07 Lod2SocTm1Str
and set it to the lower SOC threshold for the second level of load shedding.
• Select the parameter Battery state of charge limit for load shedding 2 stop in the additional time period
/ 242.08 Lod2SocTm1Stp and set it to the upper SOC threshold for the second level of load shedding.
5. Set the SOC threshold for the additional time period:
• Select the parameter Battery state of charge limit for load shedding 1 start in the additional time
period / 242.03 Lod1SocTm2Str and set it to the lower SOC threshold for the first level of load shedding.
• Select the parameter Battery state of charge limit for load shedding 1 stop in the additional time
period / 242.04 Lod1SocTm2Stp and set it to the upper SOC threshold for the second level of load shedding.
• Select the parameter Battery state of charge limit for load shedding 2 start in the additional time
period / 242.09 Lod2SocTm2Str and set it to the lower SOC threshold for the second level of load shedding.
• Select the parameter Battery state of charge limit for load shedding 2 stop in the additional time
period / 242.10 Lod2SocTm2Stp and set it to the upper SOC threshold for the second level of load shedding.
88 SI30M-44M-60H-80H-IA-en-32
SMA Solar Technology AG
Installation manual