Wind Power in the UK (PDF). - Sustainable Development Commission

sd.commission.org.uk

Wind Power in the UK (PDF). - Sustainable Development Commission

Glossary of termsTransmission - The act or process oftransporting electric energy in bulk.Transmission and distribution (T&D) losses -Losses that result from the heating effect ofcurrent as it flows through wires to travel fromthe generation facility to the customer. Becauseof losses, the electricity produced by the utilityis greater than the electricity that shows up onthe customer bills.Transmission and distribution (T&D) system -An interconnected group of electric transmissionlines and associated equipment for themovement or transfer or electrical energy inbulk between points of supply and points atwhich it is transformed for delivery to theultimate customers.Transmission lines - Heavy wires that carrylarge amounts of electricity over long distancesfrom a generating station to places whereelectricity is needed. Transmission lines are heldhigh above the ground on tall towers calledtransmission towers.Transmission network - the electricitytransmission system operating at voltages above132kV (in England and Wales) and including132kV in Scotland)TSO, TNO – (Electricity) Transmission System (orNetwork) OperatorUpgrade - Replacement or addition of electricalequipment resulting in increased generation ortransmission capability.Utility - A regulated vertically-integratedelectricity company. "Transmission utility" refers tothe regulated owner/operator of the transmissionsystem only. "Distribution utility" refers to theregulated owner/operator of the distributionsystem which serves retail customers.Volt – the unit of electrical potential. It is theelectromotive force which, if steadily applied toa circuit having a resistance of one ohm, willproduce a current of one ampere.Volt-amperes - The volt-amperes of an electriccircuit; the mathematical product of the voltsand amperes. Equals the power in a directcurrent circuit.Voltage - Measure of the force of movingelectrical energy.Watt - The electrical unit of power or rate ofdoing work. One horsepower is equivalent toapproximately 746 watts.Watt-hour - One watt of power expended forone hour.116 Wind Power in the UK sustainable development commission

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