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

  • Incentive : A rebate or some form of payment used to encourage people to implement a given demand-side management (DSM) technology. The incentive is calculated as the amount of the technology costs that must be paid by the utility for the participant test to equal one and achieve the desired benefit/cost ratio to drive the market.
  • Incremental Effects : Annual effects in energy use and peak load caused by new participants in existing DSM programs and all participants in new DSM programs during a given year.
  • Independent Power Producers (IPPs) : These are private entrepreneurs who develop, own or operate electric power plants fueled by alternative energy sources such as biomass, cogeneration, small hydro, waste-energy and wind facilities.
  • Independent System Operator (ISO) : An ISO is the entity charged with reliable operation of the grid and provision of open transmission access to all market participants on a non-discriminatory basis.
  • Indirect Utility Cost : Any cost that is not identified with a specific DSM category such as Administration, Marketing, etc.
  • Installed capacity : The total generating units' capacities in a power plant or on a total utility system. The capacity can be based on the nameplate rating or the net dependable capacity.
  • Intangible Transition Charge : The amounts on all customer bills, collected by the electric utility to recover transition bond expenses.
  • Integrated Resource Plan (IRP) : A comprehensive and systematic blueprint developed by a supplier, distributor, or end-user of energy who has evaluated demand-side and supply-side resource options and economic parameters and determined which options will best help them meet their energy goals at the lowest reasonable energy, environmental, and societal cost.
  • Interchange (Electric utility) : The agreement among interconnected utilities under which they buy, sell and exchange power among themselves. This can, for example, provide for economy energy and emergency power supplies.
  • Interconnection (Electric utility) : The linkage of transmission lines between two utility, enabling power to be moved in either direction. Interconnections allow the utilities to help contain costs while enhancing system reliability.
  • Interdepartmental Service (Electric) : Amounts charged by the electric department at specified rates for electricity supplied by other utility departments.
  • Intermediate Load (Electric Systems) : Range from base load to a point between that and peak load.
  • Intermittent Resources : Resources whose output depends on some other factory that cannot be controlled by the utility e.g. wind or sun. Thus, the capacity varies by day and by hour.
  • Interruptible Loads : Loads that can be interrupted in the event of capacity or energy deficiencies on the supplying system.
  • Interruptible Power : This refers to power whose delivery can be curtailed by the supplier, usually under some sort of agreement by the parties involved.
  • Interruptible Rates : These provide power at a lower rate to large industrial and commercial customers who agree to reduce their electricity use in times of peak demand.
  • Interval Metering : The process by which power consumption is measured at regular intervals in order that specific load usage for a set period of time can be determined.
  • Investor-Owned Utility (IOU) : An IOU is a form of electric utility owned by a group of investors. Shares of IOUs are traded on public stock markets.

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