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Board examines wildfire risk-modeling limits after January extreme-wind events
Summary
Staff told the board utilities use risk-informed, circuit-level operational thresholds but planning models typically rely on historical worst-day samples; board members cautioned that common spread models were tested only to about 30 mph wind and urged sensitivity testing for realistic extremes.
The Wildfire Safety Advisory Board devoted substantial discussion Dec. 3 to how electric utilities incorporate extreme-weather conditions into both operational decisions (like PSPS and device settings) and longer-term planning models.
Senior adviser Donald Richards summarized staff'led follow-up to an Energy Safety request: the three large investor-owned utilities (PG&E, Southern California Edison and SDG&E) responded that they use risk-informed criteria combining a fire potential index (FPI), fuel-moisture…
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