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A-C | D-E | F-I | L-N| O-Q | R | S-Z | Acronyms
AC - alternating current
ACE - Area Control Error
AGC - Automatic Generator Control
ARA - Annual Reconfiguration Auction
ARD - Asset Related Demand
ARR - Auction Revenue Right
Appendix H - Appendix H of Market Rule 1, Operations during Cold Weather Conditions
ASM - Ancillary Services Market
BA - Balancing Authority
BACT - best available control technology
BCC - backup control center
C&LM - conservation and load management
CA - Control Area
CAA - U.S. Clean Air Act
CAGR - compound annual growth rate
CAIR - Clean Air Interstate Rule
CAMS - Customer and Asset Management System
CARL - Control Area Reliability
CC - Combined Cycle (generator)
CCP - Capacity Commitment Period
CEII - Critical Energy Infrastructure Information
CELT Report - Forecast Report of Capacity, Energy, Loads, and Transmission
CFR - Code of Federal Regulations
CIP - Critical Infrastructure Protection
CONE - Cost of New Entry
COP - Current Operating Plan
COS - cost of service
CP - Clearing Price
CPI - Consumer Price Index
CPS - Control Performance Standard
CPS - Critical Path Standard
CT - Combustion Turbine (generator) or Connecticut Load Zone
CTR - Capacity Transfer Rights
DA - Day-Ahead (prior to the operating day)
DAALO - Day-Ahead Adjusted Load Obligation
DAANI - Day-Ahead Adjusted Net Interchange
DAGO - Day-Ahead Generation Obligation
DALO - Day-Ahead Load Obligation
DALRP - Day-Ahead Load Response Program
DAM - Day-Ahead Energy Market
DARD - dispatchable asset-related demand
DC (see HVDC) - direct current
DCF - Discounted Cash Flow
DCS - Disturbance Control Standard
DDP - Desired Dispatch Point
DEC's - Decrement Bid
DG - distributed generation
DOE - Department of Energy
DRP - demand-response provider
DRR Pilot - Demand-Response Reserve Pilot Program
DSM - demand-side management
EBB - electronic bulletin board
EcoMax - Economic Maximum
EcoMin - Economic Minimum
ECP - energy clearing price
ED - Economic Dispatch
EES - Enhanced Energy Scheduler
EFOR - equivalent forced-outage rate
EFORd - Demand Estimated Forced Outage Rate
EHV - extra-high voltage
EIS - Environmental Impact Statement
EMF - electromagnetic field
eMkt - Software application used to submit Offers and Bids into the ISO Market
EMS - Energy Management System
EP - Enrolling Participant
EPAct - Energy Policy Act of 2005
ERO - Electric Reliability Organization
ET - External Transactions
FACTS - flexible alternating-current transmission system
FAM - Financial Assurance Management
FAQ - Frequently Asked Question
FAP - Financial Assurance Policy
FCA - Forward Capacity Auction
FCM - Forward Capacity Market
FCTS - Forward Capacity Tracking System
FERC - Federal Energy Regulatory Commission
FPA - Federal Power Act
FRM - Forward Reserve Market
FTR - Financial Transmission Right
FRM - Forward Reserve Market
GADS - Generating Availability Data System
GIS - gas-insulated substation, gas-insulated switchgear, Generation Information System, Geographic Information System
GRT - Generation Requirements for Transmission Constraints
HQICC - Hydro Quebec Interconnection Capability Credits
hp - horsepower
HVDC - high-voltage direct current
IA - interconnection agreement
IBCS - Internet Based Communication System
IBL - Internal Bilateral for Load
IBM - Internal Bilateral for Market
IBT - Internal Bilateral Transaction
ICAP - Installed Capacity
ICR - Installed Capacity Requirement
ICU - Internal Combustion Unit (generator)
IGCC - integrated coal-gasification combined cycle
IMO - Independent Electricity Market Operator (Ontario)
INC's - Increment Bid
IPP - independent power producer
IROL - interconnection-reliability operating limit
IRH - Interconnection Rights Holders
ISO - Independent System Operator, ISO New England Inc.
LCC - local control center
LDC - local distribution company
LICAP - Locational Installed Capability
LMP - Locational Marginal Pricing
LNS - local network service
LOLE - loss-of-load expectation
LOS - loss of source
LPG - liquefied petroleum gas
LRP - load-response program
LSC - Local Second Contingency
LSCPR - Local Second Contingency Protection Resource
LSE - Load Serving Entity
LTTR - Long-term Transmission Right
MAIN - Mid-America Interconnected Network
MC - Markets Committee
ME - Maine Load Zone
MIS - Market Information Server
MOU - Memorandum of Understanding
MPSA - Market Participant Service Agreement
MR1 - Market Rule 1 (Section III of the Transmission, Markets & Services Tariff)
MRR - Manual Response Rate
MSS - Market Support Services
MSW - municipal solid waste
MUI -market user interface
muni - municipal utility
MW - Megawatt
MWh - Megawatt Hour
N-1 - first-contingency loss
N-2 - second-contingency loss
NAAQS - National Ambient Air Quality Standards
NB - New Brunswick
NCPC - Net Commitment Period Compensation
NECPUC - New England Conference of Public Utility Commissioners
NEL - net energy for load
NEMA/Boston - Northeastern Massachusetts/Boston load zone
NEPOOL - New England Power Pool
NERC - North American Electric Reliability Council
NESCOE - New England States Committee on Electricity
NH - New Hampshire Load Zone
NIETC - National Interest Electric Transmission Corridor
NOPR - Notice of Proposed Rulemaking
NPCC - Northeast Power Coordinating Council, Inc.
NRI - Northeast Reliability Interconnection
NYISO - New York Independent System Operator
O&M - operations and maintenance
OASIS - Open Access Same-Time Information System
OATT - Open Access Transmission Tariff
ODR - Other Demand Resource
OOM - Out-of-Merit
OP - operating procedure
OP 4 - ISO Operating Procedure No. 4, Action during a Capacity Deficiency
OP 8 - ISO Operating Procedure No. 8, Operating Reserve and Regulation
OP 17 - ISO Operating Procedure No. 17, Load Power Factor Correction
OP 19 - ISO Operating Procedure No. 19, Transmission Operations
OP 21 - ISO Operating Procedure No. 21, Actions during an Energy Emergency
OR - Operating Reserve
PA - Planning Authority
PAR - phase-angle regulator; phase-angle regulating transformer
PER - Peak Energy Rent
pnode - pricing node
POLR - provider of last resort
PPA - Power Purchase Agreement
PTDF - Power Transfer Distribution Factor
PTF - Pool Transmission Facility
PTO - Participating Transmission Owners
PTOAC - Participating Transmission Owners Administrative Committee
PUC - Public Utility Commission
PUCHA - Public Utility Holding Company Act
PURPA - Public Utility Regulatory Policies Act
PV - solar photovoltaic
QUA - Qualified Upgrade Awards
RAA - Reserve Adequacy Analysis, Resource Adequacy Assessment
RBA - Requested Billing Adjustment
RC - Reliability Committee, reliability coordinator
RCP - Regulation Clearing Price
RCPF - Reserve Constraint Penalty Factor
REC - Renewable Energy Certificate, Renewable Energy Credit
RFP - Request for Proposals
RGGI - Regional Greenhouse Gas Initiative
RI - Rhode Island Load Zone
RIG - Remote Intelligent Gateway
RMCP - Reserve Market Clearing Price
RMR - Reliability Must Run
RNA - Restated NEPOOL Agreement
RNS - Regional Network Service
ROE - Return On Equity
ROS - Rest of System
ROW - right of way
RP - resource planner
RPS - Renewable Portfolio Standard
RRA - Resource Reliability Assessment
RSC - Resource Scheduling and Commitment
RSG - Reserve Sharing Group
RSP - Regional System Plan
RT - Real-Time
RTANI - Real-Time Adjusted Net Interchange
RTANID - Real-Time Adjusted Net Interchange Deviation
RTALO - Real-Time Adjusted Load Obligation
RTGO - Real-Time Generation Obligation
RTLO - Real-Time Load Obligation
RTM - Real-Time Energy Market
RTMP - real-time marginal price
RTO - Regional Transmission Organization
SAS70 - Statement on Auditing Standards No. 70
SCADA - System Control and Data Acquisition
SCC - Seasonal Claimed Capability
SCR - Special Constrained Resources
SEMA - South East Massachusetts Load Zone
SIP - state implementation plan
SIS - System Impact Study
SMD - Standard Market Design
SME - subject matter expert
SMS - Settlement Market System
SOG - settlement-only generator
SOI - show of interest
SOL - system operating limit
SPD - scheduling, pricing, and dispatching
SPS - special protection system
SS - Self-scheduled
STATCOM - static synchronous compensator
SVC - static VAR compensator
SVD - static VAR device
SWCT - Southwest Area of the Connecticut Load Zone
TADO - Total Amount Due and Owing
TCA - Transmission Cost Allocation
TMNSR - Ten-Minute Non-Spinning Reserve
TMOR - Thirty-Minute Operating Reserve
TMSR - Ten-Minute Spinning Reserve
TO - Transmission Owner
TOA - Transmission Operating Agreement
PAC - Planning Advisory Committee
TP - transmission planner
TRAGO - Transmission Related Abnormal Generation
TSA - Transmission Service Agreement or Transmission Security Analysis
TSO - Tariffs, Schedules, and OASIS
TTC - Total Transfer Capacity
UDG - Unit Desired Generation
UDS - Unit Dispatch System
UI - User Interface
VAR - Voltage Amperes Reactive
VOC - volatile organic compound
VT - Vermont Load Zone
WCMA - West Central Massachusetts Load Zone
WEM - Wholesale Electric Market
WSCC - winter seasonal claimed capability
Load Zones
VT - Vermont Load Zone
ME - Maine Load Zone
NH - New Hampshire Load Zone
WCMA - West Central Massachusetts Load Zone
SEMA - South East Massachusetts Load Zone
CT - Connecticut Load Zone
RI - Rhode Island Load Zone
NEMA - North East Massachusetts and Boston Load Zone