> feeder lines in Sacramento?

Not sure what you mean there. If you mean feeders from the substation to the overhead, running along the poles and dropping periodically, then yes, I think I've seen some. Not everywhere, but some places. Some feeders may be underground, too. That's probably how they interconnect substations so losing one doesn't stop everything. The substations themselves, of course, are fed directly by local power not RT, and yes, my commute was occasionally slowed down by local power failures. At least once, a larger power failure took out several adjacent substations causing service stoppage and bus bridging.

A couple of substations serving some bridges over railroad lines were supposed to have ultracapacitors installed to harvest regenerated power (about half of the LRVs can do regen) from downhill running then support voltage for uphill trains. Not sure how well that worked out. Eastbound trains on the big bridge at Brighton, for instance, usually don't brake much going downhill (heading from a 35 mph into a 55 mph zone) after a hard climb through the S-curves, and westbound are going pretty slowly down the S-curves after braking lightly going uphill (from 55 mph zone to 35 in the curves on the bridge. Never saw a report on whether the test actually happened or how it turned out. It wasn't unusual for the newer (CAF) cars to have the lights and a/c go out, and even for traction power to have hiccups, when climbing that bridge eastbound on hot afternoons - probably from voltage drop in cars full of computers. We even completely stalled once; that was exciting, on a commute-time train that was standing room only.