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The inverter reactive power cannot reach the target power Highlighted

Latest reply: Aug 6, 2022 17:17:54 902 11 9 0 0

Problem description

A customer reported that the SUN2000-75KTL-C1 was connected to the monitoring server through the SmartLogger 2000. The SmartLogger responds properly when the background delivers reactive power to the SmartLogger, but the reactive power feedback value is less than the target value (the target value is 100 kVar, but the SmartLogger feedback value is only 74 kVar).

Problem location

According to the grid_adjust_run_log.log file of the SmartLogger, the monitoring background delivered a target value of 100 Kvar to the SmartLogger at 9:15 on January 15, 2020. The SmartLogger responded properly and evenly distributed the target value to 22 connected inverters.


charting


View the 5-minute run log of the inverter. The inverter reactive power starts to run properly based on the average 4.5 kvar delivered by the SmartLogger. However, when the grid voltage collected by the inverter reaches 540 V or higher, the reactive power decreases to 2.3 Kvar. As a result, the reactive power response of the entire array is low.


charting


The maximum voltage of the onsite power grid is 549.5 V, which tends to be 550 V, and the high penetration is frequently triggered. When the grid voltage is close to the high/low-through threshold or the overvoltage/Undervoltage threshold, the SUN2000 limits the reactive power output to prevent a shutdown.

Solution

Modify the inverter high- and low-through protection thresholds and reactive power after the overvoltage and Undervoltage protection thresholds.

On the SmartLogger WebUI, choose Special User > Device Monitoring > Running Parameter > Feature Parameter > LVRT Trigger Threshold to 400 and HVRT Trigger Threshold to 600.

Undervoltage protection threshold: On the SmartLogger WebUI, choose Special User > Device Monitoring > Running Parameters > Protection Parameters > Level-1 Undervoltage Protection Threshold 400.

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little_fish
Admin Created Jan 22, 2021 07:34:15

good
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Faridrami
Created Jan 24, 2021 16:10:42

thank you
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Zebra
Created Feb 4, 2021 14:21:40

Thanks for sharing
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Chanbora
Chanbora Created Jul 12, 2022 02:06:12 (0) (0)
 
bek7
Created Feb 5, 2021 16:02:32

interesting
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NTan33
Created Feb 6, 2021 01:54:55

Great run-through of the solution.
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MedinskiyO
Created Feb 15, 2021 20:46:00

Many thanks.
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Faridrami
Created Feb 21, 2021 16:45:13

Great
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Unicef
MVE Created Nov 10, 2021 13:29:50

Good share thanks
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Chanbora
Created Jul 12, 2022 02:06:21

note friend
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