Powering Europe - European Wind Energy Association
Powering Europe - European Wind Energy Association
Powering Europe - European Wind Energy Association
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eferences,glossaryandabbreviations<br />
aCtiVE PowER Is a real component of the apparent power, usually expressed in kilowatts (kW)<br />
or megawatts (MW), in contrast to REACTIVE POWER (UCTE).<br />
aDEqUaCy A measure of the ability of the power system to supply the aggregate electric<br />
power and energy requirements to the customers within component ratings<br />
and voltage limits, taking into account planned and unplanned outages of system<br />
components. Adequacy measures the capability of the power system to<br />
supply the load in all the steady states in which the power system may exist<br />
considering standards conditions (CIGRE definition).<br />
anCillaRy sERViCEs Are Interconnected Operations Services identified as necessary to perform a<br />
transfer of electricity between purchasing and selling entities (TRANSMISSION)<br />
and which a provider of TRANSMISSION services must include in an open access<br />
transmission tariff (UCTE).<br />
CaPaCity Is the rated continuous load-carrying ability of generation, transmission, or<br />
other electrical equipment, expressed in megawatts (MW) for ACTIVE POWER or<br />
megavolt-amperes (MVA) for APPARENT POWER (UCTE).<br />
CaPaCity CREDit See CAPACITY VALUE<br />
CaPaCity faCtoR (load factor) Is the ratio between the average generated power in a given period<br />
and the installed (rated) power.<br />
CaPaCity ValUE Also denoted as CAPACITY CREDIT of installed wind power capacity measures<br />
the amount of conventional generation that can be replaced by wind power capacity<br />
while maintaining existing level of supply security.<br />
ContinGEnCy Is the unexpected failure or outage of a system component, such as a generator,<br />
transmission line, circuit breaker, switch, or other electrical element.<br />
A CONTINGENCY also may include multiple components, which are related by<br />
situations leading to simultaneous component outages (UCTE).<br />
ContRol aREa Is a coherent part of the ENTSO-E INTERCONNECTED SYSTEM (usually coincident<br />
with the territory of a company, a country or a geographical area, physically<br />
demarcated by the position of points for measurement of the interchanged<br />
power and energy to the remaining interconnected network), operated by a single<br />
TSO, with physical loads and controllable generation units connected within<br />
the CONTROL AREA.<br />
A CONTROL AREA may be a coherent part of a CONTROL BLOCK that has its<br />
own subordinate control in the hierarchy of SECONDARY CONTROL (UCTE).<br />
ContRol bloCk Comprises one or more CONTROL AREAS, working together in the SECONDARY<br />
CONTROL function, with respect to the other CONTROL BLOCKS of the SYN-<br />
CHRONOUS AREA it belongs to (UCTE).<br />
CURtailMEnt Means a reduction in the scheduled capacity or energy delivery (UCTE).<br />
DynaMiC linE RatinG Controlled adaptation of transmission line rating as a function of continuously<br />
measured line temperature.<br />
176 <strong>Powering</strong> <strong>Europe</strong>: wind energy and the electricity grid
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