Electric power systems are made up of many generators, each with varyingcharacteristics, including: minimum and maximum generating capacities, start up costs,and costs to run. An independent system operator uses unit-commitment models todetermine which generating units should be in use at a...

This paper provides a survey of the history and future of storage development in the US and policy and analytical questions relating to storage. The paper discusses the history of storage development in the US, and some of the limitations in how storage investment was justified beginning in the...