(A - E) (F - J) (K - O) (P - T) (U - Z)

  • Ramp Rate : The rate at which you can increase load on a power plant. The ramp rate for a hydroelectric facility may be dependent on how rapidly water surface elevation on the river changes.
  • Ramp Up (Supply Side) : Increasing load on a generating unit at a rate called the ramp rate.
  • Ramp-Up (Demand-Side) : Implementing a demand-side management program over time until the program is considered fully installed.
  • Rate Base : Value of property upon which a utility is permitted to earn a specific rate of return.
  • Rate Class : A group of customers identified as a class and subject to a rate different from the rates of other groups.
  • Rate Structure : The design and organization of billing charges by customer class to distribute the revenue requirement among customer classes and rating period.
  • Rate-Basing : The practice by utilities of allotting funds invested in utility Research Development Demonstration and Commercialization and other programs from ratepayers, as opposed to allocating these costs to shareholders.
  • Rate-of-Return Rates : Rates set to the average cost of electricity as an incentive for regulated utilities to operate more efficiently at lower rates where costs are minimized.
  • Ratemaking Authority : The utility commission's authority as designated by a State or Federal legislature to fix, modify, and/or approve rates.
  • Ratepayer : This is a retail consumer of the electricity distributed by an electric utility. This includes residential, commercial and industrial users of electricity.
  • Real-time Pricing : The instantaneous pricing of electricity based on the cost of the electricity available for use at the time the electricity is demanded by the customer.
  • Receiving Party : Entity receiving the capacity and/or energy transmitted by the transmission provider to the point(s) of delivery.
  • Recovered Energy : Reused heat or energy that otherwise would be lost. For example, a combined cycle power plant recaptures some of its own waste heat and reuses it to make extra electric power.
  • Regional Power Exchange : An entity established to coordinate short-term operations to maintain system stability and achieve least-cost dispatch. The dispatch provides back-up supplies, short-term excess sales, reactive power support, and spinning reserve. The pool may own, manager and/or operate the transmission lines or be an independent entity that manages the transactions between entities.
  • Regional Reliability Councils : Regional organizations charged with maintaining system reliability even during abnormal bulk power conditions such as outages and unexpectedly high loads.
  • Regional Transmission Group : An organization approved by a Commission to coordinate transmission planning (and expansion), operation, and use on a regional basis.
  • Regulation : An activity of government to control or direct economic entities by rulemaking and adjudication.
  • Regulatory Compact : Under this compact, utilities are granted service territories in which they have the exclusive right to serve retail customers. In exchange for this right, utilities have an obligation to serve all consumers in that territory on demand.
  • Reliability : Electric system reliability has two components - adequacy and security. Adequacy is the ability of the electric system to supply the aggregate electric demand and energy requirements of the customers at all times, taking into account scheduled and unscheduled outages of system facilities. Security is the ability of the electric system to withstand sudden disturbances such as electric short circuits or unanticipated loss of system facilities.
  • Reliability Councils : Regional reliability councils were organized after the 1965 northeast blackout to coordinate reliability practices and avoid or minimize future outages. They are voluntary organizations of transmission-owning utilities and in some cases power cooperatives, power marketers, and non-utility generators. Membership rules vary from region to region. They are coordinated through the North American Electric Reliability Council.
  • Renewable Energy : Energy that is capable of being renewed by the natural ecological cycle.
  • Replacements : The substitution of a unit for another unit generally of a like or improved character.
  • Repowered Plant : This is an existing power facility that has been substantially rebuilt to extend its useful life.
  • Reregulation : The design and implementation of regulatory practices to be applied to the remaining regulated entities after restructuring of the vertically-integrated electric utility. The remaining Regulated entities would be those that continue to exhibit characteristics of a natural monopoly, where imperfections in the market prevent the realization of more competitive results, and where, in light of other policy considerations, competitive results are unsatisfactory in one or more respects. Reregulation could employ the same or different regulatory practices as those used before restructuring.
  • Resellers : Companies that purchase utility service from a wholesaler and resell it to consumers.
  • Reserve Capacity : Capacity in excess of that required to carry peak load.
  • Reserve Generating Capacity : The amount of power that can be produced at a given point in time by generating units that are kept available in case of special need. This capacity may e used when unusually high power demand occurs, or when other generating units are off-line for maintenance, repair or refueling.
  • Reserve Margin : The percentage of installed capacity exceeding the expected peak demand during a specified period.
  • Restructuring : The reconfiguration of the vertically-integrated electric utility. Restructuring usually refers to separation of the various utility functions into individually-operated and-owned entities.
  • Retail : Sales of electric energy to the ultimate customer.
  • Retail Company : A company that is authorized to sell electricity directly to industrial, commercial and residential end-users.
  • Retail Competition : A system under which more than one electric provider can offer to sell to retail customers, and retail customers are allowed to choose more than one provider from whom to purchase their electricity.
  • Retail Transaction : The sale of electric power from a generating company or wholesale entity to the customer.
  • Retail Wheeling : This refers to the ability of end-use customers of any size to purchase electric capacity, energy or both from anyone other than the local electric utility by moving or wheeling such power over the local utility's transmission and/or distribution lines.
  • Rolling Blackouts : A controlled and temporary interruption of electrical service. These are necessary when a utility is unable to meet heavy peak demands because of an extreme deficiency in power supply.
  • Running and Quick-Start Capability : Generally refers to generating units that can be available for load within a 30-minute period.
  • Rural Electric Cooperative : A nonprofit, customer-owned electric utility that distributes power in a rural area.

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