Ramp rateThe rate at power system load or generator output varies, or the limits to such rates due to mechanical or reliability considerations.
Real-time marketAn electricity market that settles–determines the price–for one-hour periods or less during the day of delivery.
Real-time pricingThe instantaneous pricing of electricity based on the cost of the electricity available for use at the time the electricity is demanded by the customer.
Reference priceThe settlement price of a derivatives contract, based on a particular location and commodity; An estimated electricity offer price based on operating and…
Regional Transmission Organization (RTO)A voluntary organization of electric transmission owners, transmission users and other entities approved by the Commission to efficiently coordinate…
Reliability must run (RMR)A unit that must run for operational or reliability reasons, regardless of economic considerations. Also called a reliability agreement.
Reserve marginThe percentage of installed capacity exceeding the expected peak demand during a specified period.
Residual fuel oilHeavy fuel oil produced from the residue in the fractional distillation process rather than from the distilled fractions. No.
Retail unbundlingDisaggregating electric utility service into its basic components and offering each component separately for sale with separate rates for each component.
Ring-fencingTechniques used to isolate the credit risk of a subsidiary within a corporation from the risk of its affiliated companies.
risk managementThe process, distinct from risk assessment, of weighing policy alternatives, in consultation with all interested parties, considering risk assessment and…
Rolling blackoutsA controlled and temporary interruption of electrical service. They are necessary when a utility is unable to meet heavy peak demands because of an…