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
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Appendix A: Deviations from the National DER Connection Guidelines (informative) Table 31 Table of deviations from National DER Connection Guidelines Section Description of deviations Type of deviation Justification 1.2
IES systems under 30kVA
excluded
n/a
These systems are covered
under STNW1170 Standard for
Micro EG Connections
1.2 and
various
other
instances
“Rotating Machines” used
instead “Non-IES”
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electricity system
Rotating Machines or rotating
electrical machines is an
established term used in
Industry and IEC standards.
1.2 and 5
EG Systems registered under
Chapter 5 is included in scope
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The DNSPs had one standard
for all HV EG Systems and this
practice is carried forward with
clear separation of
requirements for different
categories.
1.2, 4.1,
4.2, 4.4
Removed exclusion for ESS in
both total system capacity and
Export limits for IES.
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ESS can have an integrated
inverter and be AC or be DC.
An ESS with integrated
inverter would not be excluded
from either total system
capacity or Export limit for IES
due to impact on the
Distribution System.
2.1
Different definitions for defined
terms where appropriate. Italics
is used to highlight specific
terms in NER/National Energy
Retail Law not defined in this
Standard.
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For better clarity and alignment
with other related documents.
2.2
Abbreviations replaced with new
additions. Some acronyms also
moved to the definitions section.
n/a
Documentation policy to not
include abbreviations not
required within the Standard.
2.3.1
onwards
Numbering structure changed
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benefit to Australia’s
electricity system
To fit >5 MVA connections to
form one Standard for HV EG
Connections and improve
readability for the end user.
4.8
Nominated maximum voltage
set point is omitted.
n/a
Voltage control is covered
under S 4.10.
4.11
Communications requirements
excluded for Class A1 EG
systems. Large Non-export EG
Systems are required (Class A2
and above)
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Large Non-export EG Systems
can still impact the network
significantly. An example is
importing a large amount of
power in the event of a
generating failure.