Technical Information
PV inverter
Usage and settings of PV inverters in island grids and backup systems
Contents
Deviations from the nominal voltage and frequency are possible in island grids and in backup systems
during grid failures. Despite these variations in the island grid, all components of these systems must work together smoothly.
•Find the right SMA PV inverter type that is suitable for usage in an island/backup system (see page 2 ff).产品质量法试题 •Set the PV inverter parameters to island/backup so that you can achieve optimal operation (see page 4 ff).
•The PV inverter can reduce its output power with these island/backup parameter settings if required by the
battery charge state or the consumer power demands. This task is assumed by the Frequency Shift Power
Control (FSPC) integrated in the PV inverter (see page 8 ff).
1 Choosing the PV inverter李斯特狩猎
The following SMP PV inverters can be used in island grids or backup systems:
Inverter Island system Backup system SB 700x x
SB 1100 / 1700x x
SB 1100LV x x
SB 2100TL x
SB 2400 x x
SB 2500x x*
SB 3000x x*
SB 3000TL-20 / 4000TL-20 / SB 5000TL-20 x x
SB 3300x x
SB 3300TL x
SB 3300TL HC x
SB 3800x x
SB 4200TL Multi-String / 5000TL Multi-String x
SB 4200TL HC / SB 5000TL HC x
SB 5000TLW Multi-String x SMC 4600A / 5000A / 6000A x x SMC 5000 / 6000 x x SMC 7000HV x x SMC 6000TL / 7000TL / 8000TL x x SMC 9000TL / 10000TL / 11000TL x x SWR 700 / 850(E) / 1100E x SWR 1100LV x SWR 1500 x SWR 1700(E)x SWR 2000 x SWR 2500 / 3000 x
*In the backup system S, SI 2012/2224: Usage from model series May 2005
Sizing procedure:
In an island system, the nominal AC power of the PV inverter may only be twice as large as the nominal AC power of the island grid inverter.
In a backup system, the maximum AC power of the PV inverter is limited by the Automatic Switch Box (AS-Box).
The following table shows the nominal PV inverter power that you can connect to a suitable AS-Box: Automatic Switch Box – Type nominal AC power of PV inverter
AS-Box S 4.6 kW
AS-Box M 5.7 kW
AS-Box L30 kW
AS-Box XL110 kW
SUNNY BACKUP SET S
Connect a maximum of 2 PV inverters to an AS-Box S!
SUNNY BACKUP SET XL
In a Sunny Backup system XL, the nominal AC power of the PV inverter may only be twice as large as the sum of the nominal AC power of the backup inverters.
2 Setting the island grid/backup parameters
Note when configuring the SMA PV inverters for operation in island grids or backup systems:
DEFAULT SETTINGS
You can order all PV inverters with default island grid or backup parameters from SMA Solar Technology.
WARNING!
As soon as you set a PV inverter to island grid/backup parameters, the device no longer complies with certain standards and guidelines (e.g. in Germany the DIN VDE 0126-1-1). Danger of feedback if the public grid is down.
•Never directly operate the PV inverter on the public grid with these settings.
ACCESS PERMISSION
For changing the grid relevant parameters in the PV inverter you need a special access code, the installer code. To obtain your personal code, contact the Sunny Island Hotline by calling +49 561 9522 399 or sending an e-mail to SunnyIsland.Service@SMA.de.
You need one of the following communication devices to set the PV inverter parameters:
•Sunny Boy Control
•Sunny WebBox
•PC/laptop with Sunny Data /Sunny Data Control software and a service cable for data transfer (SMA order number: "USBPBS-11" USB service interface)
Change the parameter settings as described in the user manual for the device or the software.
2.1 Setting the parameters for PV inverter Sunny Boy SB 3000TL-20 / 4000TL-20 / SB 5000TL-20
庄逢甘
Setting parameters with the internal rotary code switch
In the first 10 operational hours you can set the inverter types SB 3000TL-20 / 4000TL-20 / SB 5000TL-20 using the rotary code switch to island grid/backup operation ("off-grid"). In this time period you do not require access permission to change the grid parameters.
Turn the rotary code switch to the position "E1". "E" stands for off-grid and "1" stands for German.
Setting parameters with the software Sunny Data/Sunny Data Control
After the first 10 operational hours you can only set the island grid/backup parameters using the communication devices. For this you need access permission.
Set the parameter "GridGuard.CntrySet" to "None".
Operation of the inverters in 60 Hz grids
NO GRID FREQUENCY DETECTION
The inverters SB 3000TL-20 / 4000TL-20 / SB 5000TL-20 do not perform automatic grid frequency detection (50 Hz or 60 Hz).
Setting the parameters to island grid/backup operation using the rotary code switch does not change the frequency. The device continues to operate with a frequency of 50 Hz. Manually change the frequency from 50 Hz to 60 Hz if you wish to use this inverter in 60 Hz grids.
苍茫云海中秋月
Parameter settings for operation in 60 Hz grids:
•"GridGuard.FrqCtl.hLim" = 65 Hz
•"GridGuard.FrqCtl.Max" = 65 Hz
•"GridGuard.FrqCtl.lLim" = 55 Hz
•"GridGuard.FrqCtl.Min" = 55 Hz
2.2 Setting parameters for the PV inverters Sunny Boy SB 2100TL / SB 3300TL / SB 3300TL HC / SB 4200TL Multi-String / SB 4200TL HC / 5000TL Multi-String / SB 5000TL HC / SB 5000TLW Multi-String for backup operations
The inverter types SB 2100TL / SB 3300TL / SB 3300TL HC / SB 4200TL Multi-String / SB4200TL HC / 5000TL Multi-String / SB 5000TL HC / SB 5000TLW Multi-String are set up manually for backup operation. For this you need access permission.
Set the parameters in the following table with the values provided.
2.3 Setting parameters for other PV inverter types
This chapter describes the settings for the following PV inverter types: No.Parameter Unit Value
1I-NiTest mA Off (MSD = 0)
4Fac-delta–
lower range in which the Sunny Boy is active relative to f 0
Hz
–4.5 (starting from base frequency f 0)
5Fac-delta+
upper range in which the Sunny Boy is active relative to f 0
Hz
+1.5 (starting from base frequency f 0)
Max. Rate of change
Hz/s 4
-
SB 700
- SB 1100 / 1700 - SB 1100LV - SB 2400 - SB 2500 - SB 2800i - SB 3000 - SB 3300 - SB 3800
- SMC 4600A / 5000A / 6000A - SMC 5000 / 6000 - SMC 7000HV
- SMC 6000TL / 7000TL / 8000TL - SMC 9000TL / 10000TL / 11000TL
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