Glossary of terms

A

A2O - Application to offer  ^{gas connections}

AAHEDC - Assistance for areas with high electricity distribution  ^electricity

ACER - Agency for the Cooperation of Energy Regulators  ^{gas and electricity}

ANS - Active Notification System  ^gas

ASEP - Aggregated system entry point  ^gas

AQ - Annual quantity  ^gas

ARA - Annual report and accounts  ^{gas and electricity}

B

BCA - Bilateral connection agreement  ^electricity

BEGA - Bilateral embedded generation agreement  ^electricity

BELLA - Bilateral embedded licence exemptible large power station agreement  ^electricity

BM - Balancing Mechanism  ^electricity

BMRS - Balancing Mechanism Reporting System  ^electricity 

BSC - Balancing and Settlement Code  ^electricity

BSSG - Balancing services standing group  ^electricity

BSUoS - Balancing Services Use of System  ^electricity

C

CACoP - Code Administration Code of Practice  ^electricity

CAM - Capacity Allocation Mechanism  ^gas

CBSG - Commercial balancing services group  ^electricity

CES - Commercial Engineering Services  ^electricity

CHP - Combined heat and power  ^gas

ChUG - Charging user group  ^electricity

CLoCC - Customer low-cost connections  ^gas

CMN - Capacity Market Notices  ^electricity

CSEP - Connected system entry point  ^gas

CUSC - Connection and Use of System Code  ^electricity

CV - Calorific value  ^gas

CWV - Composite weather variable  ^gas

D

D - The gas day  ^gas

DAI - Day-ahead interruptible  ^gas

DECC - Department of Energy and Climate Change

DFN - Daily flow notification(s)  ^gas

DFO - Delivery facility operator(s)  ^gas

DMC - Daily metered consumer(s)  ^gas

DN - Distribution network  ^{gas and electricity}

DNO - Distribution network operator  ^{gas and electricity}

DRC - Data Registration Code  ^electricity

DSR - Demand side response  ^{gas and electricity}

E

EBI - Energy balancing invoice  ^gas

ECQ - Emergency curtailment quantity  ^gas

EFCC - Enhanced Frequency Control Capability  ^electricity

EFR - Enhanced frequency response  ^electricity

EMR - Electricity Market Reform  ^electricity

ENC - European network codes  ^electricity

ENTSOG - European Network of Transmission System Operators for Gas  ^gas 

EOD - End of day  ^gas

ERPS - Enhanced reactive power service  ^electricity

ESO - Electricity System Operator  ^electricity

ETO - Electricity Transmission Owner  ^electricity

ETR - European Transparency Regulation

ETYS - Electricity Ten Year Statement  ^electricity

EV - Electric vehicles  ^electricity

F

FCF - Firm curtailment factor  ^gas

FCO - Full connection offer  ^gas

FES - Future Energy Scenarios

FFR - Firm frequency response  ^electricity

G

GC - Grid Code  ^electricity

GCD - Gas charging discussion  ^gas

GCDF - Grid code development forum  ^electricity

GDW - Gas deficit warning  ^gas

GFOP - Gas Future Operability Planning  ^gas 

GHG - Greenhouse Gas  ^gas

GMRS - Gas Market Reporting System  ^gas 

GSG - CUSC governance standing group  ^electricity

GS(M)R - Gas Safety (Management) Regulations  ^gas 

GSO - Gas System Operator  ^gas

GT - Gas transporter  ^gas

GTO - Gas Transmission Owner  ^gas

GTYS - Gas Ten Year Statement  ^gas

H

HAP - Highest accepted price  ^gas

HSE - Health and Safety Executive

I

ICF - Interruptible curtailment factor  ^gas

ICO - Initial connection offer  ^gas

IECR - Incremental entry capacity release  ^gas

IP - Interconnection point  ^gas

J

JESG - Joint European stakeholder group  ^electricity

JPC - Joint planning committee  ^electricity

K

Kw - Kilowatt  ^electricity

Kwh - Kilowatt hour  ^electricity

L

LAP - Lowest accepted price  ^gas

LDTEC - Limited duration transmission entry capacity  ^electricity

LDZ - Local distribution zone  ^gas

Linepack - the amount of gas within the system at any time  ^gas

LNG - Liquefied natural gas  ^gas

LRS - Long range storage  ^gas

M

MCM - Million cubic meters  ^gas

MFR - Mandatory frequency response  ^electricity

MIPI - Market Information Provision Initiative  ^gas

MN - Margins notice  ^gas

MODIS - Market Operation Data Interface System  ^electricity

MRS - Medium range storage  ^gas

MSEC - Monthly system entry capacity  ^gas

N

NBP – National balancing point  ^gas

NDM - Non-daily metered   ^gas

NETS - National Electricity Transmission System  ^electricity

NGP - National Grid Property

NGSE - Network gas supply emergencies  ^gas

NOA - Network Options Assessment

NRAPM - Negative Reserve Active Power Margin^electricity

NSL - Network sensitive load  ^gas

NTS - National Transmission System  ^gas

O

OCM - On-the-day commodity market  ^gas

Ofgem - Office of Gas and Electricity Markets

OM - Operating Margins  ^gas

OPN - Offtake profile nominations  ^gas

ORPS - Obligatory reactive power service  ^electricity

OTC - Over the counter  ^gas

OUG - Own use gas  ^gas

P

PARCA - Planning and Advanced Reservation of Capacity Agreement  ^gas

PCLP - Projected closing linepack  ^gas

PMC - Pipeline Maintenance Centre  ^gas

PRI charge - Physical renomination incentive charge  ^gas

Q

QSEC - Quarterly system entry capacity  ^gas

R

REMIT - Regulation on wholesale energy markets integrity and transparency  ^{gas and electricity}

RIIO - Revenue = Incentives + Innovation + Outputs  ^{regulatory framework}

RMSEC - Remaining monthly system entry capacity  ^gas

S

SAP - System average price  ^gas

SCCA - Storage curtailment compensation arrangements  ^gas

SF - Scaling factor  ^electricity

SFN - Storage flow notification  ^gas

SMP - System marginal price  ^gas

SND - Seasonal normal demand  ^gas

SO - System operator  ^{gas and electricity}

SO to SO - System operator to system operator  ^electricity

SOF - System Operability Framework

SOQ - Supply offtake quantity  ^electricity

SQSS - Security and Quality of Supply Standards  ^electricity

SRS - Short range storage  ^gas

STC - System operator Transmission owner Code  ^electricity

STOR - Short-term operating reserve  ^electricity

STTEC - Short-term transmission entry capacity (firm access service)  ^electricity

T

TCMF - Transmission charging methodology forum  ^electricity

TEC - Transmission entry capacity  ^electricity

TNUoS - Transmission Network Use of System  ^electricity

TO - Transmission owner  ^{gas and electricity}

TPC - Transmission Planning Code  ^gas

TRW - Transmission reinforcement works  ^electricity

TSS - Transportation Support Services  ^gas

TWR - Transmission works register  ^electricity

U

UAG - Unaccounted for Gas  ^gas

UNC - Uniform Network Code  ^gas

V

VIP - Visual Improvement Provision

VLDMC - Very large daily metered consumer  ^gas

W

WAP - Weighted average price  ^gas

WCF - Weather correction factor  ^gas

X

Y

Z