DATA REQUIREMENTS FOR AEMO’S
PLANNING ADVICE
PREPARED BY:
Transmission Services
DOCUMENT REF:
VERSION:
1
DATE:
11 October 2011
FINAL
DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
Version Release History
VERSION
1
v1
DATE
APPROVED
11 Oct 11
Joe Spurio
11 October 2011
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DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
Data Requirements for AEMO’s Planning Advice
AEMO prepares a Planning Advice document for all new connections, whether there are
augmentations to the Declared Shared Network (DSN) or not.
The purpose of the Planning Advice is to inform:

AEMO and regional Transmission Operation Centre (TOC) operational staff of the
objectives of the connection to the DSN, the connection’s intended application, and the
impact on network capability including any operational constraints.

All relevant organisations of the as-built asset data needed for loadflow and fault level
studies, as authorised by the asset owner, relating to the connection.
This ensures system operation will remain safe, secure, and within asset ratings and capabilities at
all times, including initial energisation, testing and commissioning of new works.
The Planning Advice describes:
1. The need for the connection and the associated planning considerations.
2. The information that must be considered during operation and maintenance of the assets
including how the new works integrate into the existing network and may possibly integrate
with the future network. The information will include:
a. Ratings and parameters for relevant network assets and assets connecting to the DSN.
b. Associated protection, communication and control systems.
c. Any special procedures / precautions (such as switching sequences).
d. New or changed operational constraints.
In preparation of the Planning Advice, information is obtained from a number of planning
documents and other relevant sources. The information sources will include connection
applications, works specifications and service agreements. A party may also provide additional
data or information advising AEMO of particular plant capabilities; these may not have been
covered in the above documents.
AEMO will refer to the information available and may request the relevant asset owners to
reconcile any information discrepancies and confirm against the data and parameters pertinent to
the as-built network assets and assets connecting to the DSN.
Responsibility to provide AEMO corresponding data and information for assets, including
augmentations to the existing network assets or new assets connecting to the network, rests with
the relevant asset owner. However, an applicant initiating a connection to the DSN should ensure
that the data and information provided to AEMO by the network asset owner is appropriate for
operation of the new connection.
AEMO initiates preparation of a Planning Advice approximately six months ahead of the
anticipated completion of the new connection or network augmentation. The following table
summarises the key milestones associated with preparation of the Planning Advice.
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DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
Activity
Relevant Milestone
AEMO instigates the preparation of Planning Advice 6 months ahead of completion
1 based on planning information and design data of augmentation or connection
available to AEMO
AEMO consults the relevant planning and operational 4 months ahead of completion
staff, including that of TOC and distribution of augmentation or connection
2 businesses, and the asset owners, on the adequacy
and accuracy of the information that will be included
with the planning advice
3
AEMO issues a draft Planning Advice based on the 3 months ahead of completion
most up-to-date information available
of augmentation or connection
AEMO receives confirmation of the asset information 1 month after the completion of
4 based on as-built (and verified during commissioning if augmentation or connection
relevant) from the asset owners
5
AEMO issues final Planning Advice
2 months after the completion of
augmentation or connection
Appendix 1 summarises the network and connecting asset ratings and parameters that are
generally included as a part of the Planning Advice, where relevant.
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DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
Appendix 1: Data and information generally included in Planning Advice
Note:

Applicants are to provide data named in the table below, as applicable to the connection.

The following list is not exhaustive and AEMO may request additional data, if relevant, to
include in the Planning Advice to ensure safe and secure operation of the network and
connecting assets.

In all cases this data should be provided to AEMO prior to commencing any construction
work. This data should be consistent with data provided with all other written advices,
including planning applications, works specifications and the Use of System Agreement. If
data provided for preparation of Planning Advice is different to that already included in
these and other documents, the differences should be highlighted and reasons for change
in data provided.
Data / Information
Source
All data to be provided for 5oC steps from 5oC to 50oC inclusive if not deemed to be constant
Single line diagram (SLD) of all applicant’s:
Applicant

assets forming part of the transmission network

plant directly connected to the transmission network

in case of new generators, and any associated transformers,
lines/feeders, shunt and/or series reactive plant connecting
this generating system to the transmission network

point of connection to transmission network
Layout diagram of assets in the SLD
Applicant
Transmission line information
Line and tower number/s, station and bus name, or other like
identification of the point/s of connection to the transmission network
Applicant
R / X / line charging parameters
Applicant
Generator information
Rated MVA
Applicant
Rated MW (sent out)
Applicant
Rated MW (generated)
Applicant
PMAX MW (maximum power generated)
Applicant
Nominal terminal voltage
Applicant
Anticipated terminal voltage operating range
Applicant
Auxiliary load at PMAX
Applicant
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DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
Rated reactive generating output at generator terminals at PMAX
Applicant
Rated reactive absorbing output at generator terminals at PMAX
Applicant
Minimum load (ML)
Applicant
Rated stator current
Applicant
Generator stator resistance
Applicant
Direct axis transient reactance (unsaturated)
Applicant
Direct axis transient reactance (saturated at rated terminal voltage)
Applicant
Direct axis sub-transient reactance (unsaturated)
Applicant
Direct axis sub-transient reactance (saturated at rated terminal
voltage)
Applicant
Zero sequence reactance
Applicant
Negative sequence reactance
Applicant
Nominal voltage at connection to network
Applicant
Total station net maximum capacity (NMC)
Applicant
The following data are to be provided as at the point of supply, as
negotiated with AEMO – usually the point of connection to the
existing network – as augmented for a connection:
Applicant

Maximum 3 phase short circuit infeed per generating unit
calculated by method of AS 3851 (1991)

Minimum positive, negative and zero sequence impedances
Generator capability diagram
Applicant
Generator and/or transmission network connection transformer
data
Applicant
Continuous rating (MVA)
Applicant
15 minute rating and any prior conditions (MVA)
Applicant
30 minute rating and any prior conditions (MVA)
Applicant
Maximum EHV winding continuous voltage withstand
Applicant
Nominal transformation ratio
Applicant
Number of taps
Applicant
Neutral tap
Applicant
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DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
Tapped winding
Applicant
Minimum tapping range
Applicant
Tapping Steps
Applicant
Positive sequence impedance on principal tap
Applicant
Minimum positive sequence impedance
Applicant
Zero sequence impedance on principal tap
Applicant
Minimum zero sequence impedance
Applicant
Fault current carrying capability and duration
Applicant
Busbars / Switchgear / Interplant connection data
Applicant
Continuous current rating
Applicant
Fault ratings (kA) 3 phase fault (symmetrical), single phase to
ground fault (symmetrical), instantaneous peak fault current (kA)
Applicant
Voltage rating (kV) continuous and short-term
Applicant
Station earth grid, structures and external connections
Applicant
Fault ratings (kA) 3 phase fault (symmetrical), single phase to
ground fault (symmetrical), instantaneous peak fault current (kA)
Applicant
Other data and information
Applicant
Wind farm generation equivalent impedance determining fault infeed
at low voltage terminals of main transformation connection to the
shared network
Applicant
Thevenin equivalent circuit providing fault infeed at the point of
connection of a distribution or similar lower voltage network to the
transmission network
Applicant
Fault ratings of all plant directly connected to the transmission
network
Applicant / network asset
owner
Continuous, 15 minute and 30 minute thermal ratings of all plant
directly connected to the transmission network
Applicant / network asset
owner
Continuous and all short time voltage ratings of all plant directly
connected to the transmission network
Applicant / network asset
owner
Changes to any (existing) transmission communication systems,
electrical or other protection systems, control or monitoring systems,
including any retirement / removal from service
Applicant / network asset
owner
New transmission communication systems, electrical or other
protection systems, control or monitoring systems, including any
Applicant / network asset
owner
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DATA REQUIREMENTS FOR AEMO’S PLANNING ADVICE
controls and/or restrictions relating to synchronising to the
transmission network
Any other restrictions, constraints or the like on transmission
operations due to the new connection, or affecting interaction of the
new connection with the rest of the transmission network, due to
specific normal or abnormal operating conditions of the rest of
transmission network. For example, generation output from the new
connection may be constrained under certain conditions in the rest
of the transmission network
Applicant / network asset
owner
Transmission network settings relating to the new connection; for
example, point of connection target voltages, synchronising or auto
reclose settings, alarm, trip or normally open / auto close control
system operating conditions
Applicant / network asset
owner
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