Standard for High Voltage eg connections



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STNW1175-Standard-for-HV-EG-Connections

Destination Protocol 
Security Controls 

SCADA traffic 
EG System 
SCADA 
DNSP
SCADA 
DNP3 
Deep packet inspection 
Next-generation firewall 

SCADA traffic 
DNSP
SCADA 
EG SCADA DNP3 
Deep packet inspection 
Next-generation firewall 

Routing 
DNSP 
ED device 
EG ED 
device 
eBGP or Open 
Shortest Path First 
(OSPF) or E
nhanced 
Interior Gateway 
Routing Protocol 
(
EIGRP) or static 
Deep packet inspection 
Next-generation firewall 

Troubleshooting ED device 
ED device 
ICMP 
Deep packet inspection 
Next-generation firewall 

Implicit deny all Any 
Any 
Any 
Non approved flows alerted as 
possible suspicious activities 
 


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
 
28 of 60 
Router
Edge Defence
SCADA
Router
Edge Defence
SCADA
Ly3
Figure 1 Information traffic flow architecture representation 
4.14 Power system modelling requirements 
4.14.1 General
The Proponent shall: 
a. undertake steady-state, root mean square (RMS) modelling as required to confirm 
compliance to this Standard’s requirements; and 
b. develop and supply an EMT model to the DNSP as required in Section 4.14.2. 
4.14.2 EMT modelling requirements
EMT modelling shall comply with the requirements in Table 17. The EMT modelling and analysis 
shall be through PSCAD
TM
/EMTDC
TM
simulation. 
All models and analysis shall be certified by an RPEQ who has competence in the relevant area of 
practice. The Proponent shall comply with the Power System Model Guidelines published by 
AEMO under S5.5.7(a)(3) of the NER and any other modelling requirements advised by the DNSP. 
Detailed requirements on EMT studies is found in Section 6.6.

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