This report covers the potential of commercial and industrial loads in California to provide fast automated demand response for ancillary services. While the Northwest does not have a market for ancillary services there are some interesting take-aways from this report. First, there is a comparison of automated DR to battery storage that puts the cost of automated DR around 10 percent of the cost of battery storage. Then there is an estimate of the ability of commercial loads to shed by end-use and by duration.
The report is available at http://drrc.lbl.gov/node/431.