Standard for High Voltage eg connections


Standard for High Voltage EG Connections



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STNW1175-Standard-for-HV-EG-Connections

Standard for High Voltage EG Connections 
 
STNW1175 
Owner: EGM Engineering
Release: 4, 11 Feb 2022 

Document ID: 2946177 
SME: Manager Generation & Customer Standards 
Uncontrolled When Printed
 
4 of 60 
4.8.2
 
Lightning insulation levels for surge arrestors .............................................. 22
 
4.8.3
 
Standard power system frequency .............................................................. 22
 
4.9
 
Fault levels and protection impacts ........................................................................... 23
 
4.9.1
 
Fault withstand requirements ....................................................................... 24
 
4.10
 
Power quality ............................................................................................................ 24
 
4.10.1
 
General ....................................................................................................... 24
 
4.10.2
 
Voltage changes and flicker......................................................................... 24
 
4.10.3
 
Short duration over voltages ........................................................................ 24
 
4.10.4
 
Harmonic distortion ..................................................................................... 25
 
4.10.5
 
Voltage unbalance ....................................................................................... 25
 
4.10.6
 
Power quality meter ..................................................................................... 25
 
4.11
 
Communication and SCADA requirements ............................................................... 26
 
4.11.1
 
Communication systems ............................................................................. 26
 
4.11.2
 
SCADA requirements .................................................................................. 26
 
4.12
 
Data and information ................................................................................................. 26
 
4.12.1
 
Static data and information .......................................................................... 26
 
4.12.2
 
Dynamic data and information ..................................................................... 26
 
4.13
 
Cybersecurity and telecommunications ..................................................................... 26
 
4.13.1
 
Communications link ................................................................................... 26
 
4.13.2
 
Traffic inspection and notifications ............................................................... 27
 
4.13.3
 
Traffic flows ................................................................................................. 27
 
4.14
 
Power system modelling requirements ...................................................................... 28
 
4.14.1
 
General ....................................................................................................... 28
 
4.14.2
 
EMT modelling requirements ....................................................................... 28
 
4.15
 
Interlocking ............................................................................................................... 29
 
4.16
 
Curtailment schemes ................................................................................................ 29
 
4.17
 
Technical Studies ...................................................................................................... 29
 
5
 
Class A1 and Class A2 EG System requirements ............................................................... 30
 
5.1
 
Inverter Energy Systems ........................................................................................... 30
 
5.1.1
 
Energy Storage System (ESS) .................................................................... 30
 
5.2
 
Class A1 and Class A2 protection requirements ....................................................... 31
 
5.2.1
 
Inverter integrated protection ....................................................................... 31
 
5.2.2
 
Central Protection ........................................................................................ 32
 
5.2.3
 
Passive Anti-islanding protection ................................................................. 33
 
5.2.4
 
Overcurrent and earth fault protection ......................................................... 34
 
5.2.5
 
Grid reverse power or Power Limit protection .............................................. 34
 
5.2.6
 
Synchronisation facilities ............................................................................. 34
 
5.2.7
 
Neutral Voltage Displacement (NVD) protection .......................................... 34
 



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