“Self-healing” distribution is usually implemented as FLISR (Fault Location, Isolation, and Service
Restoration). The concept is simple: detect the faulted section quickly, isolate it, and restore supply to
healthy sections via tie switches.
Where FLISR projects succeed
- Protection coordination matches the switching logic and available fault indicators.
- Comms latency and availability assumptions are measured, not guessed.
- Operations procedures are aligned: who owns the switching decision, and what are the safety gates?
Minimum validation checks
- Time-to-isolate targets (seconds/minutes) and end-to-end latency tests.
- Switching constraints (backfeed limits, voltage regulation, thermal limits) enforced in logic.
- Event logging and post-event analytics to improve settings over time.
Practical takeaway: treat FLISR as an operations product, not only a protection scheme — reliability gains
come from repeatable workflows and measurable outcomes.