Failure Event - France, Ariege, Perles-et-Castelet - 1 Dec 2020

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Event DetailsSMW-Info-button.png
Location: France, Ariege, Perles-et-Castelet
Capacity (MW): 0.5
Capacity (MWh): 0.5
Battery Module: Narada [LFP]
Application: Hybrid Supercacitor plus Storage System
Installation: Substation
Enclosure Type: Container
Event Date: 1 December 2020
System Age (yr): 0
Extent of Damage: Fire
State During Accident: Commissioning, testing
Description: The substation has 500 kWh of batteries and 1 MW - 10s of supercapacitors. The supercapacitors were not involved in the cause of failure, which happened during acceptance testing. The investigation found that rack #2 suddenly discharged into rack #3, and the current passed through only modules #1 to #7 of rack #3. The insulation resistance of rack #2 fell below the safety threshold and neared short circuit for rack #3. The investigation report provides a hypothesis of two faults resulting in failure: an electrical connection failed and came into contact with the metal frame, and an insulation fault between the busbar connecting a module to the BPU box, which may have caused an electric arc upstream of the fuse. The container was destroyed.
Root Cause:
Failed Element:
Source: Investigation Report (English Translation)
Additional Resources: Investigation Report (Original source, French)
Note: Missing values in this table reflect unknowns.

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