<p>ACRONYMS Acronyms 5/8/18</p><p>Acronym Expansion</p><p>A Symbol for Ampere</p><p>ABA Adjacent Balancing Authority</p><p>AC Alternating Current</p><p>ACB Air Circuit Breaker</p><p>ACE Area Control Error</p><p>ACSR Aluminum Conductor Steel Reinforced</p><p>AEP American Electric Power</p><p>AFC Available Flowgate Capability</p><p>AGC Automatic Generation Control</p><p>AIC Alternative Interpersonal Communication</p><p>AIE Area Interchange Error</p><p>ALR Adequate Level of Reliability</p><p>ANSI American National Standards Institute</p><p>AS Ancillary Services</p><p>ASCC Alaskan System Coordination Council</p><p>ASCII American Standard Code for Information Interchange</p><p>ASD Adjustable Speed Drive</p><p>ATC Available Transfer Capability</p><p>ATF After The Fact</p><p>AVR Automatic Voltage Regulator</p><p>B Symbol for frequency Bias</p><p>β Symbol for frequency response characteristic</p><p>BA Balancing Authority</p><p>BAAL Balancing Area ACE Limit</p><p>BAL Balancing</p><p>BCP Blackstart Capability Plan</p><p>2Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>BES Bulk Electric System</p><p>BPA Bonneville Power Administration</p><p>BPD Bushing Potential Device</p><p>BPS Bulk Power System</p><p>BSR Black Start Resource</p><p>BSU Black Start Unit</p><p>BTU British Thermal Unit</p><p>C Symbol for Capacitance</p><p>CA Contingency Analysis</p><p>CB Circuit Breaker</p><p>CBM Capacity Benefit Margin</p><p>CCA Critical Cyber Asset</p><p>CCPD Capacitively Coupled Potential Device</p><p>CCVT Capacitively Coupled Voltage Transformer</p><p>CERTS Consortium for Electric Reliability Technology Solutions</p><p>CF Compliance Factor</p><p>CFC Constant Frequency Control</p><p>CIP Critical Infrastructure Protection</p><p>CME Coronal Mass Ejection</p><p>CNI Constant Net Interchange</p><p>COM Communications</p><p>COU Commonly Owned Unit</p><p>CPC Control Performance Criteria</p><p>CPM Control Performance Measure</p><p>CPS Control 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Symbol used in CPS2 for the 10-minute average targeted frequency error</p><p>EA Emergency Assistance</p><p>EACMS Electronic Access Control or Monitoring Systems</p><p>EAP Electronic Access Point</p><p>EAR Event Analysis Report</p><p>ED Economic Dispatch</p><p>4Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>EDE Energy Deficient Entity</p><p>EEA Energy Emergency Alert</p><p>EEI Edison Electric Institute</p><p>EHC Electro Hydraulic Control</p><p>EHV Extra High Voltage</p><p>EIR Electric Industry Registry</p><p>EM Electromechanical</p><p>EMF Electro Magnetic Field</p><p>EMF Electro Motive Force</p><p>EMS Energy Management System</p><p>EOP Emergency Operation & Preparedness</p><p>EPRI Electric Power Research Institute</p><p>ERCOT Electric Reliability Council of Texas</p><p>ERO Electric Reliability Organization</p><p>ESP Earth Surface Potential</p><p>ESP Electronic Security Perimeter</p><p>ETC Existing Transmission Commitments</p><p>EWG Exempt Wholesale Generator</p><p>F Symbol for Farad</p><p>F Symbol for Frequency</p><p>FA Frequency Actual</p><p>FR Frequency Resonance</p><p>FS Frequency Scheduled</p><p>FAC Facilities</p><p>FAL Frequency Abnormal Limit</p><p>FERC Federal Energy Regulatory Commission</p><p>FNET Frequency monitoring NETwork</p><p>5Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>FPA Federal Power Act</p><p>FRC Frequency Response Characteristic</p><p>FRCC Florida Reliability Coordinating Council</p><p>FRL Frequency Relay Limit</p><p>FRM Frequency Response Measure</p><p>FRO Frequency Response Obligation</p><p>FRSG Frequency Response Sharing Group</p><p>FTL Frequency Trigger Limit</p><p>FTR Firm Transmission Rights</p><p>G Symbol for Giga or 109</p><p>GCB Gas Circuit Breaker</p><p>GIC Geomagnetic Induced Currents</p><p>GLDF Generator to Load Distribution Factor</p><p>GMD Geo Magnetic Disturbance</p><p>GO Generation Owner</p><p>GPE Generation Providing Entity</p><p>GOP Generation Operator</p><p>GSF Generation Shift Factor</p><p>GSU Generator Step Up</p><p>GW Giga Watt</p><p>GWh Giga Watt hour</p><p>H Symbol for Henry. Symbol for inertial constant.</p><p>HBA Host Balancing Authority</p><p>HDF Harmonic Distortion Frequency</p><p>HDV Harmonic Distortion Voltage</p><p>HIR High Initial Response</p><p>HP High Pass</p><p>6Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>HP High Pressure</p><p>HS High Side</p><p>HV High Voltage</p><p>HVDC High Voltage Direct Current</p><p>HZ Hertz</p><p>I Symbol for current</p><p>IME Interchange Metering Error</p><p>IA Interchange Authority</p><p>IC Interchange Coordinator</p><p>ICCP Inter Control center Communications Protocol</p><p>IDC Interchange Distribution Calculator</p><p>IEEE Institute of Electrical & Electronics Engineers</p><p>IFRO Interconnection Frequency Response Obligation</p><p>IME Interchange Metering Error</p><p>INT Interchange</p><p>IOS Interconnected Operations Services</p><p>IOU Investor Owned Utilities</p><p>IP Intermediate Pressure</p><p>IPP Independent Power Producer</p><p>IR Inertia Ratio</p><p>IRO Interconnection Reliability Operations</p><p>IROL Interconnection Reliability Operating Limit</p><p>IROL TV Interconnection Reliability Operating Limit TV</p><p>IS Interchange Schedule</p><p>ISDN Integrated Services Digital Network</p><p>ISN Interregional Security Network</p><p>ISO Independent System Operator</p><p>7Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>IT Interchange Transaction</p><p>IT Instrument Transformer</p><p>ITC International Transmission Company</p><p>ITS Interchange Transaction Scheduler</p><p>JOU Jointly Owned Unit</p><p> k Symbol for Kilo or 103</p><p> kV kilo Volt</p><p> kVAr kilo Volt Amperes reactive</p><p> kW kilo Watt</p><p> kWh kilo Watt hours</p><p>L Symbol for inductance</p><p>LC-CSC Line Commutated Current Sourced Converter</p><p>LDC Load Drop Compensation</p><p>LED Light Emitting Diode</p><p>LF Load Forecast</p><p>LLR Local line Loading Relief</p><p>LOF Loss Of Field</p><p>LP Low Pressure</p><p>LS Low Side</p><p>LSE Load Serving Entity</p><p>LSF Load Shift Factor</p><p>LTC Load Tap Changer</p><p>LV Low Voltage</p><p>M Symbol for Mega or 106</p><p>MAV Mercury Arc Valve</p><p>MCP Market Clearing Price</p><p>MEL Minimum Excitation Limiter</p><p>8Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>MHO Ohm spelled backwards (type of distance relay)</p><p>MISO Midwest Independent System Operator</p><p>MMI Man Machine Interface</p><p>MOD Modeling</p><p>MOD Motor Operated Disconnect</p><p>MRO Midwest Reliability Organization</p><p>MSC Mechanically Switched Capacitor</p><p>MVA Mega Volt Ampere</p><p>MVAr Mega Volt Ampere reactive</p><p>MW Mega Watt</p><p>MWh Mega Watt hour</p><p>N-1 Normal – 1</p><p>NAESB North American Energy Standards Board</p><p>NARUC National Association of Regulatory Utility Commissioners</p><p>NASPI North American Synchro Phasor Initiative</p><p>NATC Non-recallable Available Transfer Capability</p><p>NERC North american Electric Reliability Corporation</p><p>NESC National Electricity Safety Code</p><p>NIA Net Interchange Actual</p><p>NIS Net interchange Scheduled</p><p>NIST National Institute of Standards and Technology</p><p>NL Native Load</p><p>NLTC No Load Tap Changer</p><p>NOAA National Oceanic and Atmospheric Administration</p><p>NOPR Notice of Proposed Rule Making</p><p>NPCC Northeast Power Coordinating Council</p><p>NRC Nuclear Regulatory Commission</p><p>9Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>NRCan Natural Resources Canada</p><p>NUG Non-Utility Generator</p><p>NYPP New York Power Pool</p><p>OASIS Open Access Same time Information Service</p><p>OATT Open Access Transmission Tariff</p><p>OLTC Off Load Tap Changer</p><p>OOS Out Of Step</p><p>OPF Optimal Power Flow</p><p>OSL Operating Security Limit</p><p>OTC Operating Transfer Capability</p><p>OTDF Outage Transfer Distribution Factor</p><p>P Symbol for Active Power (MW)</p><p>P-V Power versus Voltage</p><p>P.U. Per Unit</p><p>PA Planning Authority</p><p>PACS Physical Access Control Systems</p><p>PAR Phase Angle Regulator</p><p>PC Planning Coordinator</p><p>PCGC Personnel Certification Governance Committee</p><p>PCA Protected Cyber Assets</p><p>PF Power Factor</p><p>PJM Pennsylvania Jersey Maryland</p><p>PLC Power Line Carrier</p><p>PLC Programmable Logic Controller</p><p>PMG Permanent Magnet Generator</p><p>PMU Phasor Measurement Unit</p><p>POD Point Of Delivery</p><p>10Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>POR Point Of Receipt</p><p>POTT Permissive Over-reaching Transfer Trip</p><p>PRC Protection and Control</p><p>PS Personnel Subcommittee</p><p>PSE Purchasing Selling Entity</p><p>PSI Pounds per Square Inch</p><p>PSMP Protection System Maintenance Program</p><p>PSP Physical Security Perimeter</p><p>PSIG Pounds per Square Inch Gauge</p><p>PSP Physical Security Perimeter</p><p>PSS Power System Stabilizer</p><p>PST Phase Shifting Transformer</p><p>PT Potential Transformer</p><p>PTDF Power Transfer Distribution Factor</p><p>PTP Point to Point Transmission Service</p><p>PUC Public Utility Commission</p><p>PUHCA Public Utility Holding Company Act of 1935</p><p>PURPA Public Utility Regulatory Policies Act of 1978</p><p>PUTT Permissive Under-reaching Transfer Trip</p><p>PX Power Exchange</p><p>Q Quality</p><p>Q Symbol for Mvar</p><p>QF Qualifying Facility</p><p>R Symbol for Resistance</p><p>RAAI Reliability Adjustment Arranged Interchange</p><p>RAS Remedial Action Scheme</p><p>RATC Recallable Available Transfer capability</p><p>11Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>RBC Reliability Based Control</p><p>RC Reliability Coordinator</p><p>RCIS Reliability Coordinator Information System</p><p>RE Regional Entity</p><p>RE Reliability Entity</p><p>RF Reactive Factor</p><p>RFC Reliability First Corporation</p><p>RFI Request for Interchange</p><p>RMS Root Mean Square</p><p>ROP Rules of Procedure</p><p>ROW Right Of Way</p><p>RP Resource Planner</p><p>RPM Revolutions Per Minute</p><p>RRO Regional Reliability Organization</p><p>RRSG` Regulation Reserve Sharing Group</p><p>RSG Reserve Sharing Group</p><p>RTCA Real Time Contingency Analysis</p><p>RTG Regional Transmission Group</p><p>RTO Regional Transmission Organization</p><p>RTU Remote Terminal Unit</p><p>S Symbol for MVA</p><p>SAC Standards Authorization Committee</p><p>SCADA Supervisory Control And Data Acquisition</p><p>SC-VSC Self Commutated Voltage Sourced Converter</p><p>SCR Short Circuit Ratio</p><p>SCR Silicon Controlled Rectifier</p><p>SE State Estimator</p><p>12Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>SERC Southeastern Electric Reliability Council</p><p>SESC Space Environmental Service Center</p><p>SF6 Symbol for Sulfur hexa-Fluoride gas</p><p>SIL Surge Impedance Loading</p><p>SMD Solar Magnetic Disturbance</p><p>SMD Standard Market Design</p><p>SMS Single Most Severe</p><p>SO System Operator</p><p>SOE Sequence of Events</p><p>SOL System Operating Limit</p><p>SPP Southwest Power Pool</p><p>SPS Special Protection System</p><p>SSR Sub Synchronous Resonance</p><p>STATCOM Static Compensator</p><p>SVC Static Var Compensator</p><p>SVS Static Var System</p><p>SWPC Space Weather Prediction Center</p><p>T&D Transmission and Distribution</p><p>TCF Total Capacity of Facilities</p><p>TCR Thyrister Controlled Reactor</p><p>TDF Transmission Distribution Factor</p><p>THD Total Harmonic Distortion</p><p>TLB Tie Line frequency Bias</p><p>TLR Transmission line Loading Relief</p><p>TOP Transmission Operator</p><p>TO Transmission Owner</p><p>13Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>TOP Transmission Operations</p><p>TOU Time Of Use</p><p>TOV Transient Over Voltage</p><p>TP Transmission Planner</p><p>TRE Texas Reliability Entity</p><p>TSP Transmission Service Provider</p><p>TPL Transmission Planning</p><p>TRM Transmission Reliability Margin</p><p>TRMID Transmission Reliability Margin Implementation Document</p><p>TSA Transient Stability Analysis</p><p>TSC Thyrister Switched Capacitor</p><p>TSIN Transmission System Information Network (Used as the EIR)</p><p>TTC Total Transfer Capability</p><p>TV Time Value</p><p>TVA Tennessee Valley Authority</p><p>TVMP Transmission Vegetation Management Program</p><p>UC Unit Commitment</p><p>UF Under Frequency</p><p>UFLS Under Frequency Load Shedding</p><p>UHV Ultra High Voltage</p><p>ULTC Under Load Tap Changing</p><p>UPS Uninterruptible Power Supply</p><p>URAL Under excited Reactive Ampere Limit</p><p>UTC Universal Coordinated Time (French acronym)</p><p>UVLS Under Voltage Load Shedding</p><p>V Symbol for Volt</p><p>14Copyright Operations Training Solutions 2015 Acronyms 5/8/18</p><p>Acronym Expansion</p><p>VA Volt Ampere</p><p>VAR Voltage and Reactive</p><p>VSC Voltage Sourced Converter</p><p>V-Q Voltage versus Q (for reactive power studies)</p><p>VT Voltage Transformer</p><p>W Symbol for Watt</p><p>WACS Wide Area Control System</p><p>WAMS Wide Area Monitoring System</p><p>WebSAS Web based Security Analysis System</p><p>WECC Western Electricity Coordinating Council</p><p>WEQBPS Wholesale Electric Quadrant Business Practice Standard</p><p>WART Wide Area Reliability Tool</p><p>XC Transmission line capacitive reactance</p><p>XL Transmission line inductive reactance</p><p>YTD Year To Date</p><p>Z Symbol for impedance</p><p>15Copyright Operations Training Solutions 2015</p>