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ALARM & EVENT MANGEMENT

From anomaly signal to closed-loop handling,
Let every event have its context.

Link a set of discrete signals from BMS, PCS, EMS, Temperature Control, Fire Protection and Communications Systems to a complete event by equipment, time and condition that can be understood, graded, disposed of and reset.

Alarm management is not “turning off the red light,” but building a full closed loop from detection, correlation, judgment, action, and recovery through verified closure.
Current Activity 1
Association signal 42
Abnormal Relevance 95%
System End State SAFETY

01 Detection sources: multi-system signals converging on one cabinet

BMS
Cell temperature
Temperature variance
SOC
PCS
Power
Electricity
Status
EMS
Schedule Command
Power limit value
Operation plan
Thermal control system
Traffic
Fan
Temperature variance
FIRE FIGHTING SYSTEM
Smoke detection
Fire state
Association
communications systems.
Chain
Reconnect
Delay
BMS: In the first instance, the highest temperature increase of R05 cores, the increase in temperature differentials and the change in the state of the local Pack are important battery side evidence of this event.

02 Correlation engine: merge discrete signals into one operational event

Correlation rule engine
Correlation
Aggregation window 2.1 s
Asset scope Colleague / Co-Rack
State context Power / Temperature
Suppression rules 10 min

03 · Event timeline: full lifecycle of one cabinet, one event

Align temperature, current, communications, and event status on one timeline to avoid mistaking sequence for causation.
&Normal
WARNING
Alarm
Protection
Confirm.
Processing
Restore

04 Severity and strategy

Event Type Device Abnormal/ Thermal-Communications
Site seriousness P2 Medium level
Initial Policy Temperature protection 25% reduction
Scope of impact Single / Single Rack Priority
Promotion rules Constant Heating / Smoke P1
Confirm SLA ≤ 15 min
Restoration principle Gradual recovery, no direct full power
Strategic principles: Severity decides priority, Strategy decides how the system works. The two cannot be combined into a “prosecution level”.

05 Equipment context and evidence workbench Event: 2024-05-21 10:14:23

R01
R02
R03
R04
R05
R06
R07
R08

Key sites (R05)

Points Value threshold Status
Cell Temp Max 66.6°C >65°C Alarm
Cell Temp Avg 58.3°C <60°C Attention
Pack Voltage 832.5 V <860 V &Normal
Pack Current 312.7 A <400 A &Normal
Cooling Flow 68% >80% Low
Moderate BMS-2 communication delay: 166 ms

Trend curves

06 Root-cause analysis: evidence, hypotheses, and confirmation

Factual evidence

1 R05-C12 first reaches 66.6°C.
2 Cooling flow declined about 12% over the same period.
3 BMS-2 communications were briefly delayed but subsequently resumed.
4 Fire alarms were not confirmed by the smoke and fire systems.
5 The upward trend of temperature after the decrease stopped.

Testable hypotheses

There's not enough traffic in the cabinet. High
Temperature Valve Carded High
Sensor Drift Medium
BMS communications anomaly leads to misreporting Low
Internal cell thermal runaway Low

Confirmed conclusion

R05 Flow of cooling down
+ Delay in the implementation of temperature control Confirmation:
On-site flow retroactivity check.
Exclude: There is no evidence to support the development of the incident into a smoke/fire.

07 Response coordination and ownership assignment

Role Personnel Duties SLA Status
Event Manager Chan.Chen Qi Integration of events and classification of disposal Fifteen minutes. Completed
Dispatchers Lee.Li Ting. Implementation reductions and operational adjustments Fifteen minutes. 10:17
Equipment Engineer Wang.Wang Man. Verify temperature control and equipment reasons Thirty minutes. Processing
Field service Cho.Zhao Yi On-site inspection and recovery Four hours. Pending construction
Head of Security LiuLiu Keung Identification of fire and safety boundaries Thirty minutes. Pending confirmation

08 · Closure is not clearing the red dot—it meets recovery and recurrence-monitoring criteria

ACK, silencing, or alarm clearance alone do not satisfy incident-close criteria.
01 Safe-state verification There is no risk that the system will run out of control.
02 Fault isolation verification Unusual source disarmed.
03 Controlled restart Gradual resumption of operations
04 Stable observation window 30 minutes.
05 Complete evidence Sheet/ Log/ Test
06 Post-incident review complete Reasons and measures confirmed
07 Incident closed Closed 11:06
• System security, failure isolation, controlled recovery, stable observation, evidence integrity, no recurrence

09 Closed incident record Example:

Event ID INC-20240521-100423-B3-2-C07
Start Time 2024-05-21 10:14:23
Close Time 2024-05-21 11:06:00
Duration 51 min 37 s
Severity P2 (High)
Confirm time About two minutes.
Restore duration About 17 minutes.
Gene. Weaknesses in temperature control implementing agencies
Impact 1 cabinet / R05 / Controlled Decline
closure criteria SR-20240521-00078

10 Alarm portfolio overview Almost 30 days.

Top alarm categories

HF equipment Top 5

Communication links BMS-2 56
Fan anomaly 38
Temperature of the core 27
PCS Temperature 19
Temperature of transformers 14

Misreporting / inhibiting signal

37%
Aggregated / suppressed single-point alarms
8.6%
Misreporting recognition rate

Trends in alarms

11 Boundaries and coordination: clear ownership, efficient collaboration

Event management

  • Alarm–event correlation
  • Severity classification
  • Responsibility and SLA
  • Disposal records
  • closure criteria
Core scope of the page
→

Predictive Maintenance

  • Identification of duplicate risk patterns
  • Risk trends and remaining life
  • Environmental degradation analysis
  • Maintenance plan optimization
Closed events have access to the predictive maintenance sample library
→

Remote O&M

  • Remote diagnosis
  • Controlled command execution
  • Maintain workflow
  • Field-service coordination
The disposal must retain the authorization and evidence of execution.
Ultimate Principle: An anomaly must be able to... Signal → Event → Context → Decision → Action → Recovery → Evidence → Experience Full retroactive, rather than staying at “the alarm has disappeared”.