IEC 62934 pdf – Gird integration of renewable energy generation – Terms and definitions
1 scope
This terminology document provides terms and definitions in the subject area of grid integrationof renewable energy generation.The technical issues of grid integration mainly focus on theissues caused by renewable energy generation with variable sources and/or converter basedtechnology,such as wind power and photovoltaic power generation.Some renewable energygenerations such as hydro power and biomass power with a relatively continuously availableprimary energy source and a rotating generator are conventional sources of generation, andare therefore not covered in this document.
The intention of this document is to answer the question “what do the words mean” and not”under what conditions do the terms apply”.
2Normative references
There are no normative references in this document.
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Is0 and lEC maintain terminological databases for use in standardization at the followingaddresses:
. IEC Electropedia: available at http://www.electropedia.orgl
. Iso Online browsing platform: available at http://www.iso.orglobp3.1 Terms and definitions for renewable energy generation3.1.1
renewable energyRE
primary energy, the source of which is constantly replenished and will not become depleted
Note 1 to entry: Examples of renewable energy are: wind,solar, geothermal, hydropower, etc.
Note 2 to entry: Fossil fuels are non renewable.
[SOURCE:IEC 60050-617:2009,617-04-11 modified, examples of renewable energy are addedin Note 1 to entry.””]
3.1.2
variable renewable energyVRE
subset of renewable energy, the source of which is not continuously available and cannot bestored or controlled
EXAMPLE wind energy,solar energy, wave energy.
3.1.3
renewable energy generation
generation of electrical energy, which uses renewable energy as the primary energy source forthe conversion into electricity
3.1.4
variable renewable energy generation
subset of renewable energy generation,which uses variable renewable energy as the primaryenergy source for the conversion into electricity
EXAMPLE Wind power generation, photovoltaic power generation,concentrated solar power generation，wavepower generation.’
Note 1 to entry: The primary energy from variable renewable energy sources is in most cases not able to be storedand therefore the electricity generated is constrained by the availabillity of the energy source.
3.1.5
renewable energy generating unitREGu
smallest set of equipment which can generate electricity from renewable energy and can feedthe electricity into an electric power network
Note 1 to entry: Several typical forms of renewable energy generating unit are shown in Annex A.3.1.6
renewable energy power plant
collection of renewable energy generating units connected to an electric power network throughone or more points of connection, including auxiliaries and connection equipment
Note 1 to entry: Two typical forms of renewable energy power plant are shown in Annex A.
3.1.7
power collection system
electrical system that collects the electricity from at least onerenewable energy generating unit and feeds this electricity into an electric power network,usually comprising transformers and overhead lines or cables
3.1.8
substation
plant substation
transformer substation or switching substation of a renewableenergy power plant through which the output power of all generating units is transmitted to theelectric power network
3.1.9
point of generating unit connectionPGuc
point that is part of the generating unit and identified by the manufacturer as a reference pointat which the generating unit is connected to the power collection system
3.1.10
point of connectionPoc
reference point on the electric power network where the user’s electrical facility is connected
[SOuRCE:IEC 60050-617:2009,617-04-01]