Table 7 System level of failure
From: Large-scale energy storage system: safety and risk assessment
Level, a | Â | Description | Failure modes | fa | Na |
|---|---|---|---|---|---|
1 | Battery rack level | Single failure affects one battery rack | Internal short circuit, overcharging, communications failure | f1 = MCS of frequency of battery rack level failures | N1 = Number of battery racks per BESS unit |
2 | BESS unit Level | Single failure affects one BESS unit or container | Cooling system failure, external short circuit, mechanical impact | f2 = MCS of Frequency of BESS unit level failures | N2 = Number of BESS units in LSSPV system |
3 | Global level | Single occurrence affects all BESS units | Natural hazard event (e.g. flood) | f3 = MCS of frequency of global level failures |  |