List of energy abbreviations

A

AAQS—Ambient Air Quality Standards (environment) (US)

AAU—Assigned amount units (measurement)

ABT—Availability based tariff (electricity)

ABF—Aquatic Base Flow (Hydropower) (electricity)

AC—Alternating current

ACA—Annual Charge Adjustment (electricity)

Acc.—Accession countries (to the European Union) (government)

ACE—Area Control Error (electricity)

ACEEE—American Council for an Energy-Efficient Economy

ACRS—Accelerated Cost Recovery System (finance)

ADITC—Accumulated Deferred Investment Tax Credit (policy)

ADR—Asset Depreciation Range (finance)

—Alternative dispute resolution

AEP—American Electric Power (electricity)

AESO—Alberta Electric System Operator

AFE—Authority for Expenditure or Authorization for Expenditure

AFUDC—allowance for funds used during construction

AFV—Alternative fuel vehicle

AGA—American Gas Association

AGC—Automatic generation control

AGD—Associated Gas Distributors (US)

AIEE—American Institute of Electrical Engineers

AIMA—Agricultural Impact Mitigation Agreement (US)

ALJ—Administrative law judge

AMBO—Armenia, Macedonia, Bulgaria Oil pipeline

AMI—Advanced metering infrastructure

AMR—Automated meter reading also known as Automatic Meter Reading

AMRA—Automatic Meter Reading Association

ANGTA—Alaskan Natural Gas Transportation Act of 1977 to build the Alaska gas pipeline

ANGTS—Alaskan Natural Gas Transportation System

ANSI—American National Standards Institute

AOS—Authorized Overrun Service

APA—Administrative Procedure Act

—Alaska Power Administration

APE—Area of potential effect (electricity)

API—American Petroleum Institute (oil)

APPA—American Public Power Association (electricity)

APR—Actual peak reduction (e.g. in demand response systems) (electricity)

AQCR—Air Quality Control Region (US) (environment)

ARA—(in shipping) ports of Amsterdam – Rotterdam – Antwerp (oil)

ARR—Auction Revenue Rights (electricity)

ASCC—Alaskan System Coordination Council

ASE—Alliance to Save Energy

ASTM—American Society for Testing and Materials

ATC—Available transfer capability

AVR—Automatic Voltage Regulator (electricity)

B

BA—Balancing Authority

BA—Biological Assessment

BACT—Best Available Control Technology

BBL/D—Barrel per day

BBL/SD—Barrel per day, on stream days

BBL—barrel (42 gallons)

—Balgzand Bacton Line (BBL Pipeline)

BCD—Barrel per day, on calendar days

BCF—billion cubic feet

BCP—Blackstart Capability Plan

BES—Bulk electric system (Electricity transmission)

BfP—Bureau Fédéral du Plan (Belgium). (Has responsibilities over economic, social and environmental policy

bhp— Brake horsepower

BIA—Bureau of Indian Affairs (US)

bl—Barrel

BLM—Bureau of Land Management of United States Department of the Interior

BLS—Bureau of Labor Statistics of United States Department of Labor

BOE—Barrel of oil equivalent (international)

BPA—Bonneville Power Administration (US)

BPL—Broadband over power line

BPS—Bulk Power System (Electricity transmission)

BTMG—Behind The Meter Generation

BTU—British thermal unit(s)

BTX—from BTX process, a mixture of benzene, toluene, and xylene (oil)

BuRec—United States Bureau of Reclamation (government)

BWR—Boiling water reactor (nuclear)

C

C&I—Commercial and industrial customers (Electricity transmission)

CA—Carbon Abatement- increasing carbon neutrality

—Control area (EU) – The portion of the generation and transmission system controlled by a single transmission system operator. (See also TSO).

CAA—Clean Air Act (US)

CAEM—Center for the Advancement of Energy Markets (US)

CAFE—Corporate Average Fuel Economy standards (US)

CAISO—California Independent System Operator Corporation, a regional transmission organization. (US)

CAP—Capacity market programs

—Climate Action Plan

CAPM—Capital asset pricing model

CARB—California Air Resources Board

CBL—Customer Baseline Load

CBM—Capacity Benefit Margin

CBOB—Conventional Gasoline Blendstock for Oxygenate Blending (Motor Gasoline Blending Component)

CC—Combined cycle see also CCPP and CCGT

CCGT—Combined cycle gas turbine electricity generator

CCLIP—Conditional Credit Line for Investment Projects

CCN—Certificate of Convenience and Necessity (utilities regulation)

CCPG—Colorado Coordinated Planning Group

CCPP—Combined cycle power plant

CD—Contract Demand

CDD—Cooling degree day, a qualitative index used to reflect the demand for energy to cool a business

CDM—Clean Development Mechanism

CEA—Country Environmental Analysis

CEC—California Energy Commission

—Commission for Environmental Cooperation

—Council of the European Communities

CEEC—Central and Eastern European Countries

CEMS—Continuous emissions monitoring system

CEP—Country Environmental Profile

—Clean Energy Partnership, a joint hydrogen-project in Europe.

CEPS—Centre for European Policy Studies

CEPII—Centre d'Etudes Prospectives et d'Informations Internationales Economics think tank

CEQ—Council on Environmental Quality

CER—Certified Emission Reduction

CERA—Cambridge Energy Research Associates

CERCLA—Comprehensive Environmental Response, Compensation, and Liability Act "Superfund" (US)

CERCLIS—Comprehensive Environmental Response, Compensation, and Liability Information System (US)

CERTS—Consortium for Electric Reliability Technology Solutions sposored by the United States Department of Energy and California Energy Commission (US)

CfD—Contract for difference

CFS—cubic feet per second

CFTC—Commodity Futures Trading Commission

CH₄—Methane

CHP—Combined heat and power

CIAC—Contributions in Aid of Construction

CIP—Critical Infrastructure Protection (US)

—see also EPCIP European Programme for Critical Infrastructure Protection

CMVE—Competitive Market Value Estimate

CNG—Compressed natural gas

CO—Carbon monoxide

CO₂—Carbon dioxide

COC—Cost of capital

COE—U.S. Army Corps of Engineers

CP—Coincident Peak

—Certificate Proceeding

CPA—California Power Authority

CPI—Consumer Price Index

CPP—Critical Peak Pricing

CPP-F—Critical peak fixed

CPP-F—Critical peak variable

CPS—Control Performance Standard

—Cycles per second (hertz)

CPUC—California Public Utilities Commission

CREF—Caribbean Renewable Energy Facility

CRP—Conservation Reserve Program (US)

CRT—Capacity Reservation Tariff

CSD—Commission for Sustainable Development (UN)

CSEM—Center for the Study of Energy Markets (US)

CSP—Country Strategy Paper

—Curtailment service provider

CT—Combustion turbine (electricity)

CZMA—Coastal Zone Management Act

D

DADRP—Day Ahead Demand Response Program

DANIDA—Danish International Development Agency

DA-RTP—RTP Day ahead real time pricing (regarding Electricity metering)

DC—Direct current

DCLM—Direct control load management

DCS—Disturbance Control Standard

DEFG—Distributed Energy Financial Group (US)

DEIS—Draft Environmental Impact Statement (US)

DER—Distributed Energy Resources

DF—Distribution Factor

DG—Distributed generation (electricity)

—Directorate-General (EU) (government)

DIIS—Danish Institute for International Studies (organization)

DLC—Direct load control (regarding Load management)

DME—Disturbance Monitoring Equipment

DO—Dissolved oxygen

DOE—United States Department of Energy (government)

DOE/FE—United States Department of Energy Office of Fossil Energy (government)

DOI—United States Department of the Interior (government)

DOT—United States Department of Transportation (government)

DP—Distribution point

DR—Demand response

DRAM—Demand Response and Advanced Metering Coalition

DRB—Demonstrated reserve base

DRCC—Demand Response Coordinating Council (coalition)

DRR—Demand Response resources

DRRC—Demand Response Research Center (California)

DSM—Demand side management

DSO—Distribution system operator (regarding electricity distribution)

Dth—Dekatherm (defined as 1 million British thermal units, also written "MMBtu") (measurement)

DTW—dealer tank wagon (as in, "oil companies setting regional dealer tank wagon pricing") (Oil)

E

E&D—Exploration and development expenses

E85—E85 fuel: A fuel containing a mixture of 85 percent ethanol and 15 percent gasoline

E95—like E85 fuel but with less gasoline. A fuel containing a mixture of 95 percent ethanol and 5 percent gasoline

EA—Environmental assessment as in an Environmental impact assessment

EAR—Estimated additional resources, as in considering reserves of uranium deposits

EC—European Commission

ECAR—East Central Area Reliability Coordination Agreement (US)

EPCIP—European Programme for Critical Infrastructure Protection

ECPA—Electric Consumers Protection Act (US)

EDC—Electric Distribution Company (electricity)

EdF—Electricité de France

EDRP—Emergency demand response program

EE—Energy efficiency

EEI—Edison Electric Institute

EF—Earth Fault

EHV—Extra high voltage

EIA—Energy Information Administration (US)

—Environmental impact assessment (international)

EIB—European Investment Bank

EIM—Energy Imbalance Market (electricity)

EIPP—Eastern Interconnection Phasor Project

EIS—Environmental Impact Statement (US)

ELCON—Electricity Consumers Resources Council

EMF—Electro magnetic field

EMP—Environmental Management Plan

EOR—Enhanced oil recovery

EPA—United States Environmental Protection Agency

EPAct—Energy Policy Act of 1992 (US)

—Energy Policy Act of 2005 (US)

EPRI—Electric Power Research Institute (US)

EPSA—Electric Power Supply Association

EQR—Electric Quarterly Report

ERA—Economic Regulatory Administration (part of United States Department of Energy

ERCOT—Electric Reliability Council of Texas, Inc, a regional transmission organization. (US)

ERGEG—European Regulators Group for Electricity and Gas

ERIS—Energy Resource Interconnection Service (electricity)

ERO—Electric Reliability Organization. The US designated NERC as its ERO.

ERoEI—Energy returned on energy invested

ERRA—Energy Regulators Regional Association

ESCO—Energy service company

ESI—Environmental Sustainability Index

ESMAP—Energy Sector Management Assistance Programme

ESP—Electrostatic precipitator

ESS—Energy Storage System, as in grid energy storage (electricity)

ETBE—ethyl tertiary butyl ether

ETSO—European Transmission System Operators association

EU—European Union

EUEF—European Union Energy Facility

EUEI—European Union Energy Initiative

F

FAC—Fuel Adjustment Clause

FACTS—Flexible Alternating Current Transmission System

FASB—Financial Accounting Standards Board

FBR—fast breeder reactor

FCITC—First Contingency Incremental Transfer Capability

FEIS—Final Environmental impact statement (US)

FELCC—Firm Energy Load Carrying Capability

FERC—Federal Energy Regulatory Commission (U.S.)

FGD—Flue-gas desulfurization

FINESSE—Financing Energy Services for Small Scale Users

Fishway—Fish ladder

FLPMA—Federal Land Policy and Management Act (US)

FME—Free market economics

FONSI—Finding of no significant impact. See Environmental impact statement (US)

FPA—Federal Power Act (US)

FPC—Federal Power Commission (US)

FPS—Firm peaking service. See Peaking power plant

FRCC—Florida Reliability Coordinating Council (US)

FRS—Financial Reporting System

FT—Firm Transportation Service

FTC—Federal Trade Commission (US)

FTR—Firm Transmission Rights

—Financial Transmission Rights. See explanation in electricity markets.

FTS—Firm transportation service

FUA—The Fuel Use Act (US)

FUCO—Foreign Utility Company

FWPA—Federal Water Power Act (US)

G

G&T—Generation and transmission utility cooperative (electricity)

GADS—Generating Availability Data System (electricity)

GAL—gallon (measurement)

GAO—Government Accountability Office (General Accounting Office) (US) (government)

GATT—General Agreement on Tariffs and Trade (government)

GDP—gross domestic product (economics)

GEF—Global Environmental Facility (environment)

Genco—Any company doing electricity generation (US) (electricity)

GFN—Global Footprint Network

GFSE—Global Forum on Sustainable Energy (organization)

GHC—Gross Inland (energy) Consumption (EU) (energy)

GHG—Greenhouse gas (climate)

GIA—Generator Interconnection Agreement (electricity)

GIC—Gas Inventory Charge (natural gas)

GISB—Gas Industry Standards Board (now NAESB) (US) (natural gas)

GLDF—Generator to Load Distribution Factor. See Load balancing (electricity)

Gm³—Billion cubic metres (measurement – gas)

GMO—Genetically modified organism

GMP—Green Mountain Power (US) (electricity)

GNP—gross national product (economics)

GNSED—Global Network for Sustainable Energy Development

GRI—Gas Research Institute (US) (natural gas)

GridCo—Any company running a transmission grid (electricity). Also known as a TransCo (US) (electricity)

GSF—Generator to Load Distribution Factor. See Load balancing (electricity)

GSR—Gas Supply Realignment (natural gas)

Gt—Gigaton (1 billion tons) (measurement)

GTCC—Gas Turbine Combined Cycle (electricity)

GTI—Gas Technology Institute (US)

Gtoe—One billion tons of oil equivalent(EU) (measurement- oil)

GVEP—Global Village Energy Partnership (organization)

GVW—gross vehicle weight (transportation)

GW—Gigawatt (one billion watts) (measurement- elect)

GWE—Gigawatt of electric energy (measurement- elect)

Gwh—Gigawatt hour (one billion watt hours) (measurement- elect)

GWP—global warming potential (climate)

H

HCA—Host Control Area (electricity)

HDD—Heating degree days a qualitative index used to reflect the demand for energy to heat a business (conservation)

HERS—Home energy rating standard (conservation)

HHI—Herfindahl–Hirschman Index (markets)

HID—high intensity discharge (electricity)

hp—Horsepower (measurement)

HTGR—high temperature gas cooled reactor (nuclear)

HVAC—Heating, ventilation, and air conditioning (conservation)

—High voltage alternating current (electricity)

HVAR—Highly Valued Aquatic Resource

HVDC—High Voltage Direct Current

I

I/C—Interruptible /Curtailable (electricity)

ICAP—Installed Capacity (electricity)

ICAP-SCR—Installed capacity special case resources (electricity)

ICCP—Inter-Control Center Communications Protocol (electricity)

ICE—Internal combustion engine (transportation)

ICT—Independent Coordinator of Transmission (US) (electricity)

—Information and Communication Technology

IDC—Interchange Distribution Calculator (electricity)

IEA—International Energy Agency (Paris)

IEM—Internal electricity market (electricity)

IEEE—Institute of Electrical and Electronics Engineers

IEPE—Institute of Energy Policy and Economics (France)

IER—Incremental Energy Rate

IET—International emission trading (policy)

IGCC—Integrated coal gasification combined cycle

IGIC—Interim gas inventory charge (natural gas)

IGSC—Interim gas supply charge (natural gas)

IGT—Institute of Gas Technology (natural gas)

IHR—Incremental Heat Rate- plant monitoring (electricity)

IIASA—International Institute for Applied System Analysis

IJC—International Joint Commission

ILP—Integrated Licensing Process

INGAA—Interstate Natural Gas Association of America

IOS—Interconnected Operations Services (electricity)

IOU—Investor owned utility (electricity)

IPAA—Independent Petroleum Association of America (oil)

IPCC—Intergovernmental Panel on Climate Change (climate)

IPP—Independent Power Producer (electricity)

IPS/UPS—Integrated Power System/United Power System, consisting of Independent Power Systems of 12 countries bordering Russia and the Unified Power System of Russia

IRC—ISO / RTO Council (electricity)

IROL—Interconnection Reliability Operating Limit (electricity)

IRP—Integrated Resource Planning

IRR—Internal Rate of Return (finance)

ISO—Independent System Operator (US) (see also TSO) Responsible for grid management, but does not own assets. (electricity)

ISO-NE—Independent System Operator of New England, a regional transmission organization. (US) (electricity)

ISO—NE ISO New England, Inc. (electricity)

ISS—Interruptible Sales Service

IT—Interruptible Transportation is gas shipment via pipeline whose delivery may be interrupted in favor of "firm shipment" contracts if there is lack of capacity. (natural gas)

ITC—Investment tax credit (policy)

ITS—"Interruptible Transportation Service" is gas shipment via pipeline whose delivery may be interrupted in favor of "firm shipment" contracts if there is lack of capacity. (natural gas)

J

JRC—Joint Research Centre

JREC—Johannesburg Renewable Energy Coalition

K

koe—One kilogram oil equivalent (EU) (measurement)

kV—Kilovolt (one thousand volts) (measurement)

kVA—One thousand volt Ampere (measurement)

kvar—one thousand vars (measurement)

kW—Kilowatt (one thousand watts) (measurement)

kWE—kilowatt electric (measurement)

kWh—Kilowatt hour (one thousand watt hours) (measurement)

L

LaaR—Load acting as a resource (ERCOT category) (electricity)

LBA—Local Balancing Authority (electricity)

LBNL—Lawrence Berkeley National Laboratory (US)

LDC—Local distribution company (electricity)

LEVP—Low Emissions Vehicle Program

LHV—lower heating value

LIHEAP—Low Income Home Energy Assistance Program

LIPA—Long Island Power Authority (US) (electricity)

LLF—Load-loss factor (electricity)

LMP—Locational marginal price/pricing. See explanation in electricity markets.

LMR—Load Modifying Resource (electricity)

LNG—Liquified Natural Gas

LODF—Line Outage Distribution Factor (electricity)

LOLE—Loss of Load Expectation (electricity)

LPG—liquefied petroleum gas

LPN—Lender Participation Notes

LRG—liquefied refinery gases

LSE—Load serving entity

LSF—Load Shift Factor

lsfo—Low sulfur fuel oil

LWR—light water reactor

M

MAAC—Mid Atlantic Area Council (US- geographically within PJM)

MADRI—Mid Atlantic Distributed Resources Initiative (US)

MAIN—Mid America Interconnected Network (US)

MAOP—Maximum allowable operating pressure

MAPP—Mid Continent Area Power Pool (US)

MBD—million barrels per day

MBOED—One million barrels of oil equivalent(EU)

MBR—Market based Rates

MBS—Macro economic Budget Support

Mcf—Roman numeral "M" for one thousand cubic feet (measurement of natural gas)

MDAS—Meter Data Acquisition System

MDD—Maximum Daily Delivery Obligations

MDDQ—Maximum Daily Delivery Quantity

MDM—Meter Data Management

MDQ—Maximum Daily Quantities

MECS—Manufacturing Energy Consumption Survey

MEDREP—Mediterranean Renewables Energy Partnership

MER—Maximum efficient rate

MERC—Mobile Emission Reduction Credit (MERC) (US)

MFV—Modified fixed variable rate

MISO—Midcontinent Independent System Operator, Inc. A regional transmission organization. (US)

MLP—Maximum lawful price

MLRA—Major Land Resource Areas

MM—Used to denote million in gas usage

MMbbl/d—one million barrels of oil per day

MMBtu—1 million British thermal units, same as dekatherm

MMC—Market Monitoring Center

MMCF—one million cubic feet (measurement of natural gas)

MMCFD—one million cubic feet per day

MMGAL—one million gallons

MMGAL/D—one million gallons per day

MMS—Minerals Management Service (US)

MMST—one million short tons

MODFLOW—model of groundwater flow

MOU—Memorandum of Understanding

MOX—mixed oxide fuel (nuclear)

MPG—Miles per gallon

MRO—Midwest Reliability Organization (US)

MSA—metropolitan statistical area

MSHA—Mine Safety and Health Administration (US)

msl—Mean sea level

MSW—Municipal solid waste

Mt—one million tons (ambiguous as to whether short tons or metric tons)

—one Metric ton

MTBE—methyl tertiary butyl ether

MTEF—Medium Term Expenditure Framework

MTEP—Midwest ISO Transmission Expansion Plan 2005 (US)

Mtoe—One million tons of oil equivalent(EU)

Muni—Municipality

MVA—Megavolt amperes (one million volt amperes)

MW—Megawatt (one million watts)

MWE—megawatt electric

MWh—Megawatt hour (one million watt hours)

N

N₂O—nitrous oxide

NAAQS—National Ambient Air Quality Standards (US)

NAESB—North American Energy Standards Board (formerly GISB)

NAFTA—North American Free Trade Agreement

NAICS—North American Industry Classification System

NAP—National Renewable Energy Action Plan

NARUC—National Association of Regulatory Utility Commissioners (US) [1]

NAS—United States National Academy of Sciences

NASPI—North American Synchrophasor Initiative

NASUCA—National Association of Utility Consumer Advocates(US)

NATC—Non Recallable Available Transfer Capability

NBS—National Bureau of Standards (US)

NCD—Non coincidental Demand

NCEP—National Council on Electricity Policy (US) [2]

NCSL—National Conference of State Legislatures (US)

NEA—The National Energy Act of 1978 (US)

NEB—National Energy Board (Canada)

NEDRI—New England Distributed Resources Initiative (US)

NEPA—National Environmental Policy Act (US)

NEPOOL—New England Power Pool

NERC—North American Electric Reliability Council

NGA—Natural Gas Act (US)

NGAA—Natural Gasoline Association of America (US)

NGL—natural gas liquids

NGPA—Natural Gas Policy Act of 1978 (US)

NGPL—Natural gas plant liquids

NGPSA—Natural Gas Pipeline Safety Act of 1968 (US)

NGSA—Natural Gas Supply Association (US)

NGV—Natural gas vehicle

NHPA—National Historic Preservation Act (US)

NIETC—National Interest Electric Transmission Corridor (US)

NITC—Normal Incremental Transfer Capability

NIMBY—Not in my backyard regarding siting of energy generation and transmission infrastructure.

NOAA—National Oceanic and Atmospheric Administration (US)

NOC—National Oil Company

NOI—Notice of Intent or Notice of Inquiry or Notice of Investigation

NOPR—Notice of Proposed Rulemaking (US)

NORDEL—association of Nordic electric system operators, comprising Denmark, Finland, Norway, Sweden

NOx—nitrogen oxides

NPCC—Northeast Power Coordinating Council (US)

NPV—Net Present Value

NRC—Nuclear Regulatory Commission (US)

NRCS—National Resource Conservation Service (US)

NRECA—National Association of Rural Electric Cooperatives (US)

NREPA—National Resource and Environmental Protection Act (US)

NRI—National Rivers Inventory (US)

NRIS—Network Resource Interconnection Service (electricity)

NSA—Noise sensitive area

NTAC—Northwest Transmission Assessment Committee (US)

NUG—Non Utility Generator

NURE—national uranium resource evaluation (US)

NYDER—New York Department of Environmental Resources

NYISO—New York Independent System Operator, Inc. (US)

NYMEX—New York Mercantile Exchange

NYPSC—New York Public Service Commission

NYSERDA—New York State Energy Research and Development Authority

O

O&M—Operation and Maintenance Expenses

O₃—Ozone

OASIS—Open Access Same-Time Information System

OATT—Open Access Transmission Tariff (US)

OCS—Outer Continental Shelf (oil)

OCSLA—Outer Continental Shelf Lands Act (oil)

OECD—Organization for Economic Cooperation and Development

OEM—original equipment manufacturers

OFO—Operational Flow Order

OMP—Operation and Maintenance Plan

Ontario—IESO Ontario Independent Electricity System Operator (Canada)

OPEC—Organization of Petroleum-Exporting Countries (oil)

OPRG—oxygenated fuels program reformulated gasoline (oil)

ORNL—Oak Ridge National Laboratory (U.S.) (nuclear)

OSHA—U.S. Department of Labor Occupational Safety and Health Administration

OTAG—Ozone Transport Assessment Group

OTDF—Outage Transfer Distribution Factor

OTEC—ocean thermal energy conversion (electricity)

P

PA—Planning Authority

—Programmatic Agreement

PADD—Petroleum Administration for Defense Districts (US)

PBR

—pebble bed reactor (nuclear)

—performance based rates (electricity)

—Performance-based regulation

PCB—polychlorinated biphenyl

PCM—Project Cycle Management

PCT—Programmable Communicating Thermostat (electricity)

PD—Preliminary Determination

PDC—Phasor data concentrator. See description in phasor measurement unit article. (electricity)

PDCI—Pacific Direct Current Intertie (US) (electricity)

PEM—Proton Exchange Membrane

PFC—perfluorocarbons

PG&E—Pacific Gas & Electric (US) (electricity)

PGA—Purchased gas adjustment

PHA—Production Handling Agreement

PHFFU—Plant held for future use

PIDX—Petroleum Industry Data Exchange (oil)

PIER—Public Interest Energy Research (CEC)

PIFUA—Powerplant and Industrial Fuel Use Act of 1978

PJM—PJM Interconnection, LLC, a regional transmission organization. (US) (electricity)

PLC—Power line communication (electricity)

PLMA—Peak Load Management Association (US) (electricity)

PM—Particulate matter

PM&E—Protection, mitigation and enhancement

PMA—Power Marketing Administration or Fed. Power Marketing Agency (US) (electricity)

PMU—Phasor measurement unit (electricity)

PNNL—Pacific Northwest National Laboratory (DOE) (US)

POD—Point of Delivery

PoE—Power over Ethernet

POLES—Prospective On Long Term Energy Systems

POLR—Provider of last resort (electricity)

PPA—Power Purchase Agreement (electricity)

PPI—producer price index

ppmv—Parts Per Million by Volume

ppp—Purchasing power parity

PPR—Potential peak reduction

PREP—Pacific Regional Energy Programme

PRESSEA—Promotion of Renewable Energy Sources in South East Asia (PRESSEA)

Prim—Primary (electricity) nuclear, hydro, geothermal, wind, solar

PSC—Public Service Commission

PSD—Prevention of Significant Deterioration

PSE—Puget Sound Energy (US) (electricity)

PTDF—Power Transfer Distribution Factor (electricity)

PTP—Point to Point Transmission Service (electricity)

PUC—Public Utility Commission (electricity)

PUD—Public Utility District (electricity)

PUHCA—Public Utility Holding Company Act of 1935 (US) (electricity)

PURPA—Public Utility Regulatory Policies Act of 1978 (US) (electricity)

PV—photovoltaic (solar)

PVC—photovoltaic cell (solar)

PVC—polyvinyl chloride

PWR—pressurized water reactor (nuclear)

PX—Power exchange

Q

QF—qualifying facility

QSE—Qualifying scheduling entity

QUAD—10¹⁵ Btu (a quadrillion in the short scale)

R

R/P—Reserve on Production

—Reserves to Production

RAB—Regional Advisory Body (US)

RAC—Refiners' acquisition cost

RAP—Regulatory Assistance Project

RAR—Reasonable assured resources

RAS—Remedial Action Scheme

RATC—Recallable Available Transmission Capability

RBMK—Russian: Реактор Большой Мощности Канальный = "High Power Channel Type Reactor" (RU)

RBOB—reformulated gasoline blendstock for oxygenate blending

RC—Reliability Coordinator

RCIS—Reliability Coordinator Information System

RCRA—Resource Conservation and Recovery Act (US)

RDF—refuse derived fuel (electricity)

REA—Rural Electrification Administration (US)

RECS—Residential Energy Consumption Survey (US)

REEEP—Renewable Energy and Energy Efficiency Partnership

RER—Renewable Energy Rider

RES—Renewable energy source

RET/EE—IAF Renewable Energy Technology & Energy Efficiency Investment Advisory Facility

RF—Radio frequency

RFA—Regulatory Flexibility Act (US)

RFC—ReliabilityFirst Corporation (US) (electricity)

RFG—reformulated gasoline (oil)

RFI—Request for Interchange

RFP—Request for proposals

RGGI—Regional Greenhouse Gas Initiative

RGS—Renewable Generating System

RM—Rulemaking

RMATS—Rocky Mountain Area Transmission Study (US) (electricity)

RMR—Reliability Must Run (electricity)

RMU—Removal Units

ROA—Return of Assets (finance)

ROE—Return of Equity (finance)

ROFR—Right of First Refusal (finance)

ROI—Return on Investment

ROW—Right of Way

RPM—Reliability Pricing Model. See explanation in electricity market#Electricity market experience. (electricity)

RRO—Regional reliability organization (US)

RSE—Revenue Stream Estimate (finance)

RSE—relative standard error

RTBM—Real-Time Balancing Market (electricity)

RTEP—Regional transmission expansion plan

RTG—Regional Transmission Group (US)

RTO—Regional transmission organization (US)

RTP—Real time Pricing

RTU—Remote Terminal Unit

RUS—Rural Utilities Service

RVP—Reid vapor pressure

S

SCADA—Supervisory control and data acquisition a remote control and telemetry system used to monitor and control the electrical system

SCE—Southern California Edison (US)

SCE&G- South Carolina Electric & Gas (US)

scf—Standard cubic foot

SCO—Stranded Cost Obligation (finance)

SCR—Special Case Resources (US- NYISO category)

SCR—Selective Catalytic Reduction

SDG&E—San Diego Gas & Electric (US)

SEA—Strategic Environmental Assessment

SEC—Securities and Exchange Commission (US)

SEER—seasonal energy efficiency ratio

SEFI—Sustainable Energy Finance Initiative

SEIA—Sustainable Energy Industry Association

SERC—Southeastern Electric Reliability Council (US)

SF₆—sulfur hexafluoride

SFC—Solid oxide fuel cell (transportation)

SFEIS—Supplemental Final Environmental Impact Statement (US)

SFV—Straight Fixed Variable

SGR—State game refuge (US)

SHPO—State Historic Preservation Office (US)

SI—International System of Units (Système international d'unités)

SIC—Standard Industrial Classification

SMPs—Special Marketing Programs

SNG—Synthetic Natural Gas or Substitute Natural Gas

SO₂—Sulfur dioxide

SOL—System Operating Limit

SPCC—Spill Prevention, Containment and Countermeasure Plan

SPM—Synchronized phasor measurement- a WAMS network with synchrophasor sensors (PMUs). (electricity)

SPP—Southwest Power Pool Inc., a regional transmission organization (US)

—Statewide Pricing Pilot (US-California)

—Small power producer (electricity)

SPR—Strategic Petroleum Reserve (US)

SPS—Special Protection System

SR—Speculative resources For example, regarding uranium deposits. (nuclear)

SRP—Salt River Agricultural Improvement & Power District (US) (electricity)

SSG—WI PWG Seams Steering Group of Western Interconnection PlanningWork Group (US) (electricity)

SSM—Synchronized system measurement-a WAMS with synchronous sensors in addition to PMUs. See Phasor networks.

STEP—Southwest Transmission Expansion Plan group (US) (electricity)

SVC—Static VAR compensator (electricity)

SWAT—Southwest Area Transmission (US) (electricity)

SWU—Separative work unit

T

TAME—Tertiary amyl methyl ether

TAPS—Trans-Alaska Pipeline System (natural gas)

TBA—tertiary butyl alcohol

TBL—Transmission business line (electricity)

TBS—Town border station

Tcf—Trillion cubic feet (measurement)

TCR—Transition Cost Recovery (Mechanism)

TDU—Transmission Dependent Utility (electricity)

TEFRA—Tax Equity and Fiscal Responsibility Act of 1985

TEN—Trans-European Networks (electricity)

TLR—Procedures Transmission Line Loading Relief Procedures (electricity)

TO—Transmission owner (electricity)

toe—Ton of oil equivalent (EU)

TOP—Transmission Operator (electricity)

TOU—Time of use (rate) (electricity)

Transco—Transmission Company (US) (electricity)

—Transcontinental Pipeline (US) (natural gas)

—National Transmission Corporation (Philippines)

TRM—Transmission Reliability Margin (electricity)

TSO—Transmission System Operator) (electricity)

TSR—Transmission Service Request (electricity)

TTC—Total Transfer Capability (electricity)

TVA—Tennessee Valley Authority (US) (electricity)

TW—terawatt (one trillion watts) (measurement)

TWH—terawatt-hour (one trillion watt hours)

T&D—Transmission & Distribution

U

U.S.C.—United States Code

U₃O₈—triuranium octaoxide (nuclear)

UAE—United Arab Emirates (oil)

UCAP—Unforced Capacity (electricity)

UCTE—Union for the Coordination of the Transport of Electricity, the power transmission system of continental Europe

UF₆—uranium hexaflouride (nuclear)

UFLS—Under frequency load shedding (electricity)

UHVAC—Ultra High Voltage Alternating Current (electricity)

UHVDC—Ultra High Voltage Direct Current (electricity)

ULCC—Ultra Large Crude Carrier (oil)

UMTRA—Uranium Mill Tailings Radiation Control Act of 1978 (US)

UNCCD—United Nations Convention to Combat Desertification

UNDESA—UN Department of Economic and Social Affairs

UNDP—United Nations Development Programme

UNDP—United Nations Development Programme

UNECE—United Nations Economic Commission for Europe

UNEP—United Nations Environment Programme

UNFCCC—United Nations Framework Convention on Climate Change

UO₂—uranium dioxide (nuclear)

UO₃—uranium trioxide (nuclear)

UO₄—uranyl peroxide (nuclear)

UOX—uranium oxide (nuclear)

URR—Ultimate Recoverable Resources

USBR—United States Bureau of Reclamation

USCE—United States Army Corps of Engineers

US DOE—United States Department of Energy

USGS—United States Geological Survey

UVLS—Under voltage load shedding (electricity)

V

V—Volt (measurement)

VA—Volt-ampere (measurement)

var—Volt-ampere reactive (measurement)

VAWT—vertical axis wind turbine (wind)

VIN—vehicle identification number (US) (transportation)

VLCC—very large crude carrier (oil)

VMT—vehicle miles traveled (transportation)

VOC—volatile organic compound

VPP—Variable peak pricing (electricity)

VSA—Voltage stability analysis

W

W—Watt

WACOG—weighted average cost of gas

WAMS—Wide area measurement system- see description in phasor measurement unit article. (electricity)

WCMC—World Conservation Monitoring Centre

WCRE—World Commission on Renewable Energy

WEA—World Energy Assessment

WEC—World Energy Council

WECC—Western Electricity Coordinating Council (US)

WEEA—World Energy Efficiency Organization

WH—watthour (measurement)

WHO—World Health Organisation

WIRAB—Western Interconnection Regional Advisory Body (US)

WRI—World Resources Institute

WSCC—Western Systems Coordinating Council (US)

WSPP—Western Systems Power Pool (US)

WSSD—World Summit on Sustainable Development

WTG—Wind turbine generator (wind)

WTI—West Texas Intermediate (US)

WTP—Willingness to pay

WY—Water Year (measurement)

Appendix: Residential energy acronyms

The following table lists a number of terms that are used in the United States for residential energy audits.

AFUE—annual fuel utilization efficiency

BTL—building tightness limit (building tightness)

CDH—cooling degree hours (climate)

CFL—compact fluorescent light

COP—coefficient of performance

CRI—color rendering index

EEM—Energy Efficient Mortgage

EER—energy efficiency ratio

EF—energy factor (clothes washers)

EIM—Energy Improvement Mortgage

ERV—energy-recovery ventilator

HDD—heating degree day

HHI—home heating index

HID—high-intensity discharge

HRV—heat-recovery ventilator

HSPF—heating seasonal performance factor

HVI—Home Ventilating Institute

IECC—International Energy Conservation Code

K-value—thermal conductance

Low-e—low emissivity

LEED—Leadership in Energy and Environmental Design, standard for Green Building design

MEF—modified energy factor (clothes washers)

MINHERS—Mortgage Industry National Home Energy Rating Systems Standards

MVG—minimum ventilation guideline (building tightness)

MVL—minimum ventilation level (building tightness)

NAECA—National Appliance Energy Conservation Act

ODS—oxygen depletion sensor

RESNET—Residential energy services network

R-value—thermal resistance

SC—shading coefficient (windows)

SEER—seasonal E efficiency ratio

SHGC—solar heat gain coefficient

SIR—savings-to-investment ratio (energy conservation investments)

SLA—Specific leakage area

SPB—Simple Payback (energy conservation investments)

SSE—steady-state efficiency

U-value—thermal transmittance (also called U-factor)

WF—water factor (clothes washers)