Xcel Energy 2006 Annual Report Download - page 16

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6
ROE Return on equity
RTO Regional Transmission Organization. An independent entity, which is established to have “functional
control” over a utility’s electric transmission systems, in order to provide non-discriminatory access to
transmission of electricity.
SFAS Statement of Financial Accounting Standards
SO2 Sulfur dioxide
SPP Southwest Power Pool, Inc.
Standard & Poor’s Standard & Poor’s Ratings Services
TEMT Transmission and Energy Markets Tariff
TCEQ Texas Commission of Environmental Quality
unbilled revenues Amount of service rendered but not billed at the end of an accounting period. Cycle meter-reading practices
result in unbilled consumption between the date of last meter reading and the end of the period.
underlying A specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates, or
other variable, including the occurrence or nonoccurrence of a specified event such as a scheduled payment
under a contract.
VaR Value-at-risk
WDNR Wisconsin Department of Natural Resources
wheeling or transmission An electric service wherein high-voltage transmission facilities of one utility system are used to transmit
power generated within or purchased from another system.
working capital Funds necessary to meet operating expenses.
Measurements
Btu British thermal unit. A standard unit for measuring thermal energy or heat commonly used as a gauge for the
energy content of natural gas and other fuels.
Bcf Billion cubic feet
Dth Dekatherm (one Dth is equal to one MMBtu)
KV Kilovolts
KW Kilowatts (one KW equals one thousand watts)
Kwh Kilowatt hours
Mcf Thousand cubic feet
MMBtu One million Btus
MW Megawatts (one MW equals one thousand KW)
Mwh Megawatt hour (one Mwh equals one thousand Kwh)
Watt A measure of power production or usage.
Volt The unit of measurement of electromotive force. Equivalent to the force required to produce a current of one
ampere through a resistance of one ohm. The unit of measure for electrical potential. Generally measured in
kilovolts or KV.