Controllable load (not to be confused with the demand response service) is a technology that allows some component of the site load to modify itself to meet the objectives of the DERs. Any load modification is temporary - it must be made up by extra load in a different time. DER-VET requires that this "energy debt" be paid in the same day it is withdrawn. This is modeled similarly to a storage system with 100% roundtrip efficiency, and is specified by the two parameters below. DER-VET does not model individual controllable loads, so instead treats their aggregate capabilities as the "controllable load" technology.
|What is the maximum power the load can reduce itself by?
|How long can the load sustain its reduced electricity consumption for?