Standard for High Voltage EG Connections
Bog'liq
STNW1175-Standard-for-HV-EG-Connections
Standard for High Voltage EG Connections
STNW1175
Owner: EGM Engineering
Release: 4, 11 Feb 2022
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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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