tag:blogger.com,1999:blog-13900197.post112379119188380385..comments2023-10-15T05:20:00.675-06:00Comments on Entropy Production: Plug-in Hybrid Ancillary Services, Take 2Robert McLeodhttp://www.blogger.com/profile/05270962906437456350noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-13900197.post-1125745001516724632005-09-03T04:56:00.000-06:002005-09-03T04:56:00.000-06:00I wrote a bit about the advantage of plug out hybr...I wrote a bit about the advantage of <A HREF="http://powerandcontrol.blogspot.com/2005/09/disaster-and-plug-in-hybrids.html" REL="nofollow">plug out hybrids </A> in emergency situations.<BR/><BR/>I have been a fan of AC Propulsion for the last few years. I include a link.M. Simonhttps://www.blogger.com/profile/09508934110558197375noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-1123888801366983952005-08-12T17:20:00.000-06:002005-08-12T17:20:00.000-06:00AC Propulsion doesn't just assume that their vehic...AC Propulsion doesn't just assume that their vehicle can act as both a source and a sink, they've tested it. Specifically, the inverter system which drives the induction motor can either consume or produce 60 Hz power.<BR/><BR/>Elsewhere on the site they lay out another advantage of this scheme: one AC-150 unit can plug into another to transfer power, allowing rescue of a vehicle which is "out of gas". As long as the capability is inherent in the technology, it makes no sense not to use it.<BR/><BR/>Speaking from experience here... if the passenger vehicle fleets of SE Michigan and northern Ohio had been equipped with AC-150's or the equivalent and plugged in during the day, the 8/14/03 blackout <I>need never have happened</I>; even if the transmission lines went out, the vehicles in Ohio would have been able to prop up local consumption long enough for orderly load-shedding to be done, and the vehicles in Michigan could have supplied much of the deficit. Down-regulation alone would have been able to arrest the cascade by absorbing the excess in Michigan, but only after Ohio had gone down; it's better to be able to nip such problems sooner than later, and if the capability comes for free, why not?<BR/><BR/>FWIW, I believe that AC Propulsion proposes immediate recharging in the morning because demand at those times is well below the afternoon peak, and excess battery storage can be used to back-feed the grid and shave that peak. To the extent that the batteries would age out before cycling would wear them out, back-feeding the grid can be done at zero additional battery-replacement cost.Engineer-Poethttps://www.blogger.com/profile/06420685176098522332noreply@blogger.com