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Utilities point to data and modeling limits — AMI telemetry, LTCs and a new LTPT tool — as causes of ICA inaccuracies
Summary
Utility staff at the CPUC ICA workshop said many zero‑capacity results stem from conservative study assumptions, limited telemetry (AMI/SCADA) and model limitations; they described long‑term tool builds, telemetry upgrades and interim automation to improve results.
Utility engineers at the CPUC’s quarterly ICA workshop described technical drivers behind a large share of zero hosting‑capacity results and said the next major improvements depend on richer telemetry and a multi‑year tool build.
SCE, PG&E and SDG&E told stakeholders that common technical contributors to 0‑capacity outputs include low source voltage episodes captured in time‑series profiles, conservative study thresholds, missing transformer or substation telemetry, and model backfilling where historical AMI or SCADA data are unavailable. SCE engineers explained that their steady‑state voltage (SSV) studies use a ±3% tolerance around a 120‑volt baseline (resulting in a 118–126 volt threshold) and that adjusting…
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