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ACRONYMS
ACRONYMS
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A Symbol for Ampere
ABA Adjacent Balancing Authority
AC Alternating Current
ACB Air Circuit Breaker
ACE Area Control Error
ACSR Aluminum Conductor Steel Reinforced
AEP American Electric Power
AFC Available Flowgate Capability
AGC Automatic Generation Control
AIC Alternative Interpersonal Communication
AIE Area Interchange Error
ALR Adequate Level of Reliability
ANSI American National Standards Institute
AS Ancillary Services
ASCC Alaskan System Coordination Council
ASCII American Standard Code for Information Interchange
ASD Adjustable Speed Drive
ATC Available Transfer Capability
ATF After The Fact
AVR Automatic Voltage Regulator
B Symbol for frequency Bias
β Symbol for frequency response characteristic
BA Balancing Authority
BAAL Balancing Area ACE Limit
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BAL Balancing
BCP Blackstart Capability Plan
BES Bulk Electric System
BPA Bonneville Power Administration
BPD Bushing Potential Device
BPS Bulk Power System
BSR Black Start Resource
BSU Black Start Unit
BTU British Thermal Unit
C Symbol for Capacitance
CA Contingency Analysis
CB Circuit Breaker
CBM Capacity Benefit Margin
CCA Critical Cyber Asset
CCPD Capacitively Coupled Potential Device
CCVT Capacitively Coupled Voltage Transformer
CERTS Consortium for Electric Reliability Technology Solutions
CF Compliance Factor
CFC Constant Frequency Control
CIP Critical Infrastructure Protection
CME Coronal Mass Ejection
CNI Constant Net Interchange
COM Communications
COU Commonly Owned Unit
CPC Control Performance Criteria
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CPM Control Performance Measure
CPS Control Performance Standard
CPS1 Control Performance Standard 1
CPS2 Control Performance Standard 2
COI California Oregon Interface
CS Circuit Switcher
CSC Current Source Converter
CSV Comma Separated Value
CT Combustion Turbine
CT Current Transformer
CVT Capacitive Voltage Transformer
D Load Damping Formula
DC Direct Current
DCB Directional Comparison Blocking
DCLM Direct Control Load Management
DCS Disturbance Control Standard
DCU Directional Comparison Unblocking
DDR Dynamic Disturbance Recorder
DF Distribution Factor
DME Disturbance Monitoring Equipment
DOE Department of Energy
DP Distribution Provider
DSM Demand-Side Management
DUTT Direct Under-reaching Transfer Trip
1 Symbol used in CPS1 & BAAL for the 1-minute average targeted frequency error
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10 Symbol used in CPS2 for the 10-minute average targeted frequency error
EA Emergency Assistance
EACMS Electronic Access Control or Monitoring Systems
EAP Electronic Access Point
EAR Event Analysis Report
ED Economic Dispatch
EDE Energy Deficient Entity
EEA Energy Emergency Alert
EEI Edison Electric Institute
EHC Electro Hydraulic Control
EHV Extra High Voltage
EIR Electric Industry Registry
EM Electromechanical
EMF Electro Magnetic Field
EMF Electro Motive Force
EMS Energy Management System
EOP Emergency Operation & Preparedness
EPRI Electric Power Research Institute
ERCOT Electric Reliability Council of Texas
ERO Electric Reliability Organization
ESP Earth Surface Potential
ESP Electronic Security Perimeter
ETC Existing Transmission Commitments
EWG Exempt Wholesale Generator
F Symbol for Farad
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F Symbol for Frequency
FA Frequency Actual
FR Frequency Resonance
FS Frequency Scheduled
FAC Facilities
FAL Frequency Abnormal Limit
FERC Federal Energy Regulatory Commission
F-NET Frequency monitoring NETwork
FPA Federal Power Act
FRC Frequency Response Characteristic
FRCC Florida Reliability Coordinating Council
FRL Frequency Relay Limit
FRM Frequency Response Measure
FRO Frequency Response Obligation
FRSG Frequency Response Sharing Group
FTL Frequency Trigger Limit
FTR Firm Transmission Rights
G Symbol for Giga or 109
GCB Gas Circuit Breaker
GIC Geomagnetic Induced Currents
GLDF Generator to Load Distribution Factor
GMD Geo Magnetic Disturbance
GO Generation Owner
GPE Generation Providing Entity
GOP Generation Operator
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GSF Generation Shift Factor
GSU Generator Step Up
GW Giga Watt
GWh Giga Watt hour
H Symbol for Henry. Symbol for inertial constant.
HBA Host Balancing Authority
HDF Harmonic Distortion Frequency
HDV Harmonic Distortion Voltage
HIR High Initial Response
HP High Pass
HP High Pressure
HS High Side
HV High Voltage
HVDC High Voltage Direct Current
HZ Hertz
I Symbol for current
IME Interchange Metering Error
IA Interchange Authority
IC Interchange Coordinator
ICCP Inter Control center Communications Protocol
IDC Interchange Distribution Calculator
IEEE Institute of Electrical & Electronics Engineers
IFRO Interconnection Frequency Response Obligation
IME Interchange Metering Error
INT Interchange
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IOS Interconnected Operations Services
IOU Investor Owned Utilities
IP Intermediate Pressure
IPP Independent Power Producer
IR Inertia Ratio
IRO Interconnection Reliability Operations
IROL Interconnection Reliability Operating Limit
IROL TV Interconnection Reliability Operating Limit TV
IS Interchange Schedule
ISDN Integrated Services Digital Network
ISN Interregional Security Network
ISO Independent System Operator
IT Interchange Transaction
IT Instrument Transformer
ITC International Transmission Company
ITS Interchange Transaction Scheduler
JOU Jointly Owned Unit
k Symbol for Kilo or 103
kV kilo Volt
kVAr kilo Volt Amperes reactive
kW kilo Watt
kWh kilo Watt hours
L Symbol for inductance
LC-CSC Line Commutated Current Sourced Converter
LDC Load Drop Compensation
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LED Light Emitting Diode
LF Load Forecast
LLR Local line Loading Relief
LOF Loss Of Field
LP Low Pressure
LS Low Side
LSE Load Serving Entity
LSF Load Shift Factor
LTC Load Tap Changer
LV Low Voltage
M Symbol for Mega or 106
MAV Mercury Arc Valve
MCP Market Clearing Price
MEL Minimum Excitation Limiter
MHO Ohm spelled backwards (type of distance relay)
MISO Midwest Independent System Operator
MMI Man Machine Interface
MOD Modeling
MOD Motor Operated Disconnect
MRO Midwest Reliability Organization
MSC Mechanically Switched Capacitor
MVA Mega Volt Ampere
MVAr Mega Volt Ampere reactive
MW Mega Watt
MWh Mega Watt hour
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N-1 Normal – 1
NAESB North American Energy Standards Board
NARUC National Association of Regulatory Utility Commissioners
NASPI North American Synchro Phasor Initiative
NATC Non-recallable Available Transfer Capability
NERC North american Electric Reliability Corporation
NESC National Electricity Safety Code
NIA Net Interchange Actual
NIS Net interchange Scheduled
NIST National Institute of Standards and Technology
NL Native Load
NLTC No Load Tap Changer
NOAA National Oceanic and Atmospheric Administration
NOPR Notice of Proposed Rule Making
NPCC Northeast Power Coordinating Council
NRC Nuclear Regulatory Commission
NRCan Natural Resources Canada
NUG Non-Utility Generator
NYPP New York Power Pool
OASIS Open Access Same time Information Service
OATT Open Access Transmission Tariff
OLTC Off Load Tap Changer
OOS Out Of Step
OPF Optimal Power Flow
OSL Operating Security Limit
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OTC Operating Transfer Capability
OTDF Outage Transfer Distribution Factor
P Symbol for Active Power (MW)
P-V Power versus Voltage
P.U. Per Unit
PA Planning Authority
PACS Physical Access Control Systems
PAR Phase Angle Regulator
PC Planning Coordinator
PCGC Personnel Certification Governance Committee
PCA Protected Cyber Assets
PF Power Factor
PJM Pennsylvania Jersey Maryland
PLC Power Line Carrier
PLC Programmable Logic Controller
PMG Permanent Magnet Generator
PMU Phasor Measurement Unit
POD Point Of Delivery
POR Point Of Receipt
POTT Permissive Over-reaching Transfer Trip
PRC Protection and Control
PS Personnel Subcommittee
PSE Purchasing Selling Entity
PSI Pounds per Square Inch
PSMP Protection System Maintenance Program
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PSP Physical Security Perimeter
PSIG Pounds per Square Inch Gauge
PSP Physical Security Perimeter
PSS Power System Stabilizer
PST Phase Shifting Transformer
PT Potential Transformer
PTDF Power Transfer Distribution Factor
PTP Point to Point Transmission Service
PUC Public Utility Commission
PUHCA Public Utility Holding Company Act of 1935
PURPA Public Utility Regulatory Policies Act of 1978
PUTT Permissive Under-reaching Transfer Trip
PX Power Exchange
Q Quality
Q Symbol for Mvar
QF Qualifying Facility
R Symbol for Resistance
RAAI Reliability Adjustment Arranged Interchange
RAS Remedial Action Scheme
RATC Recallable Available Transfer capability
RBC Reliability Based Control
RC Reliability Coordinator
RCIS Reliability Coordinator Information System
RE Regional Entity
RE Reliability Entity
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RF Reactive Factor
RFC Reliability First Corporation
RFI Request for Interchange
RMS Root Mean Square
ROP Rules of Procedure
ROW Right Of Way
RP Resource Planner
RPM Revolutions Per Minute
RRO Regional Reliability Organization
RRSG` Regulation Reserve Sharing Group
RSG Reserve Sharing Group
RTCA Real Time Contingency Analysis
RTG Regional Transmission Group
RTO Regional Transmission Organization
RTU Remote Terminal Unit
S Symbol for MVA
SAC Standards Authorization Committee
SCADA Supervisory Control And Data Acquisition
SC-VSC Self Commutated Voltage Sourced Converter
SCR Short Circuit Ratio
SCR Silicon Controlled Rectifier
SE State Estimator
SERC SERC Reliability Corporation
SESC Space Environmental Service Center
SF6 Symbol for Sulfur hexa-Fluoride gas
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SIL Surge Impedance Loading
SMD Solar Magnetic Disturbance
SMD Standard Market Design
SMS Single Most Severe
SO System Operator
SOE Sequence of Events
SOL System Operating Limit
SPP Southwest Power Pool
SPS Special Protection System
SSR Sub Synchronous Resonance
STATCOM Static Compensator
SVC Static Var Compensator
SVS Static Var System
SWPC Space Weather Prediction Center
T&D Transmission and Distribution
TCF Total Capacity of Facilities
TCR Thyrister Controlled Reactor
TDF Transmission Distribution Factor
TE Transmission Entity
THD Total Harmonic Distortion
TLB Tie Line frequency Bias
TLR Transmission line Loading Relief
TOP Transmission Operator
TO Transmission Owner
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TOP Transmission Operations
TOU Time Of Use
TOV Transient Over Voltage
TP Transmission Planner
TRE Texas Reliability Entity
TSP Transmission Service Provider
TPL Transmission Planning
TRM Transmission Reliability Margin
TRMID Transmission Reliability Margin Implementation Document
TSA Transient Stability Analysis
TSC Thyrister Switched Capacitor
TSIN Transmission System Information Network (Used as the EIR)
TTC Total Transfer Capability
TV Time Value
TVA Tennessee Valley Authority
TVMP Transmission Vegetation Management Program
UC Unit Commitment
UF Under Frequency
UFLS Under Frequency Load Shedding
UHV Ultra High Voltage
ULTC Under Load Tap Changing
UPS Uninterruptible Power Supply
URAL Under excited Reactive Ampere Limit
UTC Universal Coordinated Time (French acronym)
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UVLS Under Voltage Load Shedding
V Symbol for Volt
VA Volt Ampere
VAR Voltage and Reactive
VSC Voltage Sourced Converter
V-Q Voltage versus Q (for reactive power studies)
VT Voltage Transformer
W Symbol for Watt
WACS Wide Area Control System
WAMS Wide Area Monitoring System
WebSAS Web based Security Analysis System
WECC Western Electricity Coordinating Council
WEQBPS Wholesale Electric Quadrant Business Practice Standard
WART Wide Area Reliability Tool
XC Transmission line capacitive reactance
XL Transmission line inductive reactance
YTD Year To Date
Z Symbol for impedance
