IEC 62786:2017 pdf free download Distributed energy resources connection with the grid
1 Scope and object
This technical specification provides principles and technical requirements for distributedenergy resources (DERs) connected to the distribution network. It applies to the planning.design，operation and connection of DERs to distribution networks. t includes generalrequirements, connection scheme, choice of switchgear,normal operating range, immunity todisturbances,active power response to frequency deviation，reactive power response tovoltage variations and voltage changes，EMC and power quality，interface protection,connection and start to generate electrical power，active power management，monitoring,control and communication, and conformance tests.
This document specifies interface requirements for connection of generating plants with thedistribution network operating at a nominal frequency of 50 Hz or 60 Hz.
DERs include distributed generation and permanently connected electrical energy storage inthe form of synchronous generators,asynchronous generators, converters,etc., connected tothe medium voltage (MVv) or low voltage (LV) distribution network.
NOTE Mobile electrical energy storage devices (e.g. electrical vehicles) are under consideration for futureeditions.
The requirements of this document can be superseded by laws and regulations whereapplicable.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document.For dated references,only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies.
IEC61000(all parts)，Electromagnetic compatibility(EMC)
IEC TS 62749,Assessment of power quality – Characteristics of electricity supplied by publicnetworks
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Iso and lEC maintain terminological databases for use in standardization at the followingaddresses:
.IEC Electropedia: available at http://www.electropedia.org/
ISo Online browsing platform: available at http://www.iso.orglobp
3.1
black start
start up of an electric power system from a blackout through internal energy resources
3.2
converter-type generator
generator that produces electrical power and is connected to the distribution network via aconverter, including doubly-fed induction machines
3.3
distributed energy resourceDER
generators，including loads having a generating mode (such as electrical energy storagesystems) connected to the low or medium voltage distribution network,with their auxiliaries,protection and connection equipment
3.4
distribution network
electric power network for the distribution of electric power from and to network users forwhich a distribution system operator (Dso) is responsible
3.5
distribution system operatorDso
party operating a distribution network
Note 1 to entry: In some countries, a DS0 is also referred to as DNO (distribution network operator).
[SOURCE: IEC 60050-617:2009,617-02-10, modified – Note 1 to entry has been added]
3.6
flicker
impression of unsteadiness of visual sensation induced by a light stimulus whose luminanceor spectral distribution fluctuates with time
Note 1 to entry: Flicker can be calculated by short term indicator P,and long term indicator Pp
[SOURCE: IEC 60050-161:1990,161-08-13, modified – Note 1 to entry has been added]
3.7
fundamental frequency
frequency of the fundamental component of a periodic quantity
Note 1 to entry: For the purpose of this document, the fundamental frequency is the same as the power supplyfrequency . e.g.50 Hz or 6o Hz.
[SOURCE: IEC 60050-103,103-07-21, modified – Note 1 to entry has been added]
3.8
fundamental component
sinusoidal component of Fourier series of periodic quantity having the frequency of thequantity itself
[SOURCE: IEC 60050-103,103-07-19]
IEC 62786:2017 pdf free download
