IEC 62909-2-2019 pdf free.Bi-directional grid-connected power converters—Part 2: Interface of GCPC and distributed energy resources.
This part of lEC 62909 specifies GcPC interface requirements for particular distributedenergy resources, namely electric vehicle (EV), battery, and photovoltaic (PV)systems.Theserequirements are in addition to the general requirements given in IEC 62909-1.
2 Normative 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.
IEC 60730-1:2013, Automaticelectrical controls – Part1: General requirementslEC 60730-1:2013/AMD1:2015
IEC 61508 (all parts),Functional safety of electrical/electronic/programmable electronicsafety-relafed systems
IEC 61851-23:2014,Electric vehicle conductive charging system – Part 23: DC electricvehicle charging station
IEC 62909-1:2017,Bi-directional grid-connected power converters – Part 1: Generalrequirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in lEC 62909-1 and thefollowing apply.
lSO and lEC maintain terminological databases for use in standardization at the followingaddresses:
IEC Electropedia: available at http://www.electropedia.orgl
lSO Online browsing platform: available at http://www.iso.orglobpTable 101 provides an alphabetical cross-reference listing of terms.
The GCPC should continue to operate normally when the EV is connected or disconnected.This requires a charge/discharge switch between the EV DCI/DC converter and the DC-connection interface or between the EV DCIDC converter and the DC-port interface. Thecharge/discharge switch shall conform (as applicable) to lEC 61851-23:2014,Clauses AA.2,BB.2 and CC.7.An example of an active EV section of the GCPC with a switch at the DC-connection interface side is shown in Figure 105. Figure 106 illustrates that the EV section isinactive.
During grid-independent operation,the EV may power up and control the GCPC using adedicated auxiliary power port to switch on the GCPC and closing the charge/dischargeswitch to provide energy from the EV.This is an lEC 61851-23:2014 optional feature.
NOTE Self-start up for system B, system C and multi-outlet is not defined in lEC 61851-23:2014.
The vehicle may provide an optional function in which the auxiliary power to the station issupplied through the optional pin of the charging connector, or the cigarette lighter socket. Insuch cases, charging/discharging control of the station may be started (and operated) by theauxiliary power supplied from the vehicle,and the station shall draw the power through theterminals AS1 or AS2 shown in Figure 107.Parameters and values for the interface circuit areshown in Table 102.
Additional requirements for actuating the unintended current flow prevention circuit are shownin Figure 107. If the optional function is used, the EV section shall monitor the status of theunintentional current flow prevention circuit during the EV discharging process. lf therequirements are not satisfied, the station shall transfer to shutdown sequence.IEC 62909-2 pdf download.