Constrained connection point	Year	Gadara	Broken Hill 4	Yass	Sydney West	Sydney East	Armidale	Tamworth 330 kV	Coleambally	Molong	Tuggerah	Broken Hill	Wellington	Parkes	Darlington Point3	Yass	Munyang	Wagga 330kV	Sydney West2	Macarthur2	Murrumburrah	Deniliquin	Darlington Point	Wagga 330 kV	Ingleburn	Muswellbrook	Liverpool	Haymarket	Forbes	Broken Hill	Darlington Point	Darlington Point4	Wagga 132 kV and Yanco	Vineyard	Vineyard	Western Sydney Priority Growth Area	Various substation sites	Southern NSW	Far West NSW	Sydney West	Various Substation sites 2	Ingleburn	Kemps Creek	Liverpool	Moree	Murrumburrah	Panorama	Sydney North-	Southern NSW2	Sydney West	Sydney northwest 330 kV smart grid controls	Narrabri	Taree	North West NSW	Various substation sites 22	Greater Sydney Region	Moree/ Inverell Region	Canberra	Beryl	Canberra	Sydney South	Sydney East0	Sydney North	Albury	Dapto	Tomago	Hume	Wagga 132 kV	Murray	Eraring	Darlington Point2	Inverell	Gunnedah2	Tumut	Taree	Yass2	Tenterfield	Molong2	Various Substation Sites2	Sydney East	Lismore	Wallerawang	Lower Tumut	Regentville	Panorama	Cowra	Newcastle	Sydney East	Vales Point	Forbes	Nambucca	Gunnedah	Tomago	Kempsey	Finley	Dumaresq	Kemps Creek	Narrabri2	Uranquinty	Beaconsfield	Vineyard	Various Substation Sites22

Substation Name	Limitation Asset	Preferred investment description	Preferred investment capital cost ($M)	Preferred investment annual operating cost ($M)	Preferred investment cost accuracy (%)	Proposed timing	Annual economic cost of constraint ($M)	Constraint Primary Driver	Investment Type	Forecast Demand (50% POE) (MVA) - S25/26 or W25	Forecast Demand (50% POE) (MVA) - S26/27 or W26	Forecast Demand (50% POE) (MVA) - S27/28 or W27	Forecast Demand (50% POE) (MVA) - S28/29 or W28	Forecast Demand (50% POE) (MVA) - S29/30 or W29	Forecast Demand (50% POE) (MVA) - S30/31 or W30	Forecast Demand (50% POE) (MVA) - S31/32 or W31	Forecast Demand (50% POE) (MVA) - S32/33 or W32	Forecast Demand (50% POE) (MVA) - S33/34 or W33	Forecast Demand (50% POE) (MVA) - S34/35 or W34	Forecast Data Summer (10% POE) (MVA) - S25/26 or W25	Forecast Data Summer (10% POE) (MVA) - S26/27 or W26	Forecast Data Summer (10% POE) (MVA) - S27/28 or W27	Forecast Data Summer (10% POE) (MVA) - S28/29 or W28	Forecast Data Summer (10% POE) (MVA) - S29/30 or W29	Forecast Data Summer (10% POE) (MVA) - S30/31 or W30	Forecast Data Summer (10% POE) (MVA) - S31/32 or W31	Forecast Data Summer (10% POE) (MVA) - S32/33 or W32	Forecast Data Summer (10% POE) (MVA) - S33/34 or W33	Forecast Data Summer (10% POE) (MVA) - S34/35 or W34

Line Number	Line Name	Constraint Primary Driver	Historic Asset Continuous Rating (MVA) - Summer 2024-25 and Winter 2024	Historic Asset Continuous Rating (MVA) - Summer 2025-26 and Winter 2025	Historic Asset Continuous Rating (MVA) - Summer 2026-27 and Winter 2026	Forecast Asset Contingency Rating (MVA) - Summer 2027-28 and Winter 2027	Forecast Asset Contingency Rating (MVA) - Summer 2028-29 and Winter 2028	Forecast Asset Contingency Rating (MVA) - Summer 2029-30 and Winter 2029	Forecast Asset Contingency Rating (MVA) - Summer 2030-31 and Winter 2030	Forecast Asset Contingency Rating (MVA) - Summer 2031-32 and Winter 2031	Forecast Asset Contingency Rating (MVA) - Summer 2032-33 and Winter 2032	Forecast Asset Contingency Rating (MVA) - Summer 2033-34 and Winter 2033	Forecast Asset Contingency Rating (MVA) - Summer 2034-35 and Winter 2034	Preferred investment description	Preferred network investment capital cost (Real $M)	Preferred network investment operating cost (Real $M)	Preferred network investment cost accuracy (%)	Proposed timing	Annual risk cost of constraint ($M/y)

Coningent Project Name	Supply to Bathurst Orange and Parkes Stage 2	Moree Special Activation Precinct	Manage increased fault levels in Southern NSW	Supply to North West Slopes Area Stage 2	System Security Roadmap operational technology

Location	FDR Name	Extent of Primary Feeder Overload (% above normal cyclic rating)(Summer)			Extent of Primary Feeder Overload (% above normal cylic rating)(Winter)			Reduction Required (MVA)	Potential Solution
		Actual 18/19	Forecast 19/20	Forecast 20/21	Actual 2019	Forecast 2020	Forecast 2021

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Disclaimer

The NSW Transmission Annual Planning Report (TAPR) portal is prepared and made available solely for information purposes. It is made available on the understanding that Transgrid and/or its employees, agents and consultants are not engaged in rendering professional advice. Nothing in this document is a recommendation in respect of any possible investment.

The TAPR portal reflects the forecasts, proposals and opinions adopted by Transgrid as at 19 August 2025, other than where specifically stated. Those forecasts, proposals and opinions may change at any time without warning. Anyone considering this document at any date should independently seek the latest forecasts, proposals and opinions. The TAPR portal or the information in it may be subsequently amended or updated by Transgrid.

This TAPR portal includes information obtained from AEMO and other sources. That information has been adopted in good faith without further enquiry or verification and Transgrid takes no responsibility for any error, omission or inaccuracy in that information.

The information in this TAPR portal should be read in the context of the Electricity Statement of Opportunities, Integrated System Plan, and the National Transmission Network Development Plan published by AEMO and other relevant regulatory consultation documents. It does not purport to contain all of the information that AEMO, a prospective investor, Registered Participant or potential participant in the NEM, or any other person or interested party may require for making decisions. In preparing the TAPR portal it is not possible, nor is it intended, for Transgrid to have regard to the investment objectives, financial situation and particular needs of each person or organisation which reads or uses this document.

In all cases, anyone proposing to rely on or use the information in this document should:

1. Independently verify and check the currency, accuracy, completeness, reliability and suitability of that information

2. Independently verify and check the currency, accuracy, completeness, reliability and suitability of reports relied on by Transgrid in preparing this document

3. Obtain independent and specific advice from appropriate experts or other sources.

Accordingly, Transgrid makes no representations or warranty as to the currency, accuracy, reliability, completeness or suitability for particular purposes of the information in this TAPR portal.

Persons reading or utilising this TAPR portal acknowledge and accept that Transgrid and/or its employees, agents and consultants have no liability for any direct, indirect, special, incidental or consequential damage (including liability to any person by reason of negligence or negligent misstatement) for any damage resulting from, arising out of or in connection with, reliance upon statements, opinions, information or matter (expressed or implied) arising out of, contained in or derived from, or for any omissions from the information in this document, except insofar as liability under any NSW and Commonwealth statute cannot be excluded.

By providing your details to this TAPR portal, we will treat your information in accordance with Transgrid's Privacy Policy
Privacy Policy: https://www.transgrid.com.au/Pages/privacy.aspx

When you use and access the TAPR Portal we place cookies in your web browser for tracking purposes.

Note: The data in the TAPR Portal was last updated on 19th August 2025.

Transgrid, as the System Strength Service Provider (SSSP) for NSW, is responsible for ensuring sufficient system strength is available to maintain power system stability in NSW.

Transgrid has comprehensively assessed more than 100 network and non-network options to meet National Electricity Rules (NER) requirements and maintain a safe, secure and reliable power system. The preferred portfolio of options to meet system strength requirements is presented in the Project Assessment Conclusions Report (PACR).

The Transgrid Connection Opportunities Portal System Strength and maximum fault level data is independent of this Regulatory Investment Test - Transmission (RIT-T) assessment, and is provided only as an indication of existing levels in Transgrid’s network.

The System Strength Rule Change has established new requirements for connecting parties. A summary of these can be found on the System strength for network connections page.

System Strength Heat Map

What synchronous generation profile was used in the network studies to generate the heat map.
When assessing the system strength, measured as the three-phase fault level, for busbars across the network, a virtual synchronous generator is connected to each of the system strength nodes (SSNs) in NSW with all the other generators, including NSW interconnectors, switched off. The fault contributions are fine-tuned so the system strength levels at all SSNs are no less than and as close as possible to AEMO’s minimum requirements. The heat map represents a minimum fault level scenario.
This profile is identical to that used when undertaking the System Strength Preliminary Assessment for connection enquiries and aligns with AEMO’s System Strength Impact Assessment guidelines.
With the future connection of additional synchronous condensers, which are forecasted to be online under normal network conditions, the methodology may require review and updating.

Is this system strength under normal conditions or contingency conditions (N-1)?
The heat map represents system strength under normal operating conditions.

Does this heat map take account of existing asynchronous, committed asynchronous and advanced asynchronous generators?
The heat map is a simplified representation of available fault levels and takes into account existing and committed asynchronous generators only.

Why are some locations showing both as high and low in system strength?
For example, for a 330/132 kV substation the 330 kV bus may show low system strength while the 132 kV bus indicates high system strength.
This difference arises due to assumptions around projects sizes at different voltage levels. Larger projects are assumed to connect at a higher voltage level, leading to a large reduction in Available Fault Level. Smaller projects are assumed to connect at a lower voltage level, lead to a smaller reduction in Available Fault Level. At locations where there is more than one voltage level, there may be more than one representation of system strength.

If a substation is indicating low system strength does this mean I cannot connect to that substation?
No, a low reading does not mean you cannot connect to that location.

If a substation is indicating high system strength does this mean there is no requirement for a Full Impact Assessment and/or system strength remediation?
No, a high reading does not remove the requirement to undertake a Full Impact Assessment (FIA) and/or system strength remediation. Per NER requirements, a System Strength Preliminary Assessment must be undertaken as part of a connection enquiry response. This will then determine the requirement to undertake a FIA.

There is medium to low system strength at the location I wish to connect my project but I believe this is sufficient under system normal and we can install a transfer trip scheme to disconnect from the grid for contingencies.
The requirement for a remediation strategy due to low system strength will be confirmed following a Full Impact Assessment. A transfer trip scheme may not be an acceptable remediation strategy in all cases.
Implementation of transfer trip schemes are subject to (but not limited to) AEMO agreement and approval during GPS negotiation, technical feasibility and/or any technical limitations discovered during functional and/or detailed design phases.

SSLF

We have calculated system strength locational factors (SSLF) for each of Transgrid’s main supply points based on the latest version of the system strength impact assessment guideline. SSLF is one of the variables which must be used along with System Strength Unit Price to calculate the system strength charge.

Why has the value of SSLF for some substations been calculated in respect to system strength nodes which are far away from them?
The SSLF reflects electrical distance between each substation and the system strength node. This means that physical distance between the system strength node and the corresponding busbar is not a determining factor.

Does the SSLF values represent the maximum value, and could a lower SSLF be achieved for the same busbar?
No, the provided system strength node and SSLF is the minimum. Other system strength nodes will be higher for the same busbar.

Maximum Fault Level

The maximum fault levels, measured as the three-phase fault level, provide an indication of existing levels for busbars in Transgrid’s network. This does not consider future network augmentations or generators.

Line and BSP Data - FAQ

How can I find historical data for Lines and BSP?
The historical data trace can be found by selecting the relevant Transmission Line or Bulk Supply Point, through the hyperlink, ‘Click here to download the load trace data in XLSX format’. The past three years of available data has been provided.

How do I interpret historical Line data?
The data is a time weighted average over 30-minute intervals.
Except for rare occasions, the substation positive values mean that the substation is exporting and negative values mean that substation is importing from the transmission line. Adding the flows at each end of the line will not always be an indication of the losses (or intermediate loads/generation if they exist on Tee’d lines) due to differences in timing and accuracy of measurement at the two ends of a transmission line.

How do I interpret historical BSP data?
The data is a time weighted average over 30-minute intervals.
Data may be presented as summated transformer data or as individual line data, depending on availability and network configuration. Bulk Supply Points with multiple voltage levels are defined within the file.

What if there is no data available or there is missing data?
Due to the complexity of our transmission network, including network augmentations and outages, some data may be unavailable or missing. If you have any questions, please contact Transgrid directly via tapr@transgrid.com.au.

Available Capacity for Load - FAQ

The Available Capacity for Load can be found under the relevant Transgrid Transmission Substation.

1. What is available capacity for load?
The available capacity for load is an estimated MW value which can be connected to a particular busbar in Transgrid's existing network. Forecasted loads beyond Summer 2025/26 were not considered in the assessment.

2. How is available capacity for load determined?
The available capacity for load, for a particular busbar, is determined based on network thermal and/or voltage limitations, for system normal and critical N-1 conditions.

3. Does available capacity consider proposed network developments?
The assessment was done based on the existing 2025 network configuration.

4. What busbars are considered for load capacity?
Busbars up to 220 kV have been considered, with 330 kV as well in Greater Sydney. Load connections can be connected to busbars or voltages not included in this assessment.

5. Can I connect a larger load than the available capacity value or at a different connection point?
To obtain accurate information about what can be connected to Transgrid's network, the formal connection process must be followed. A connection enquiry starts the formal connection process. Each enquiry is reviewed on an individual basis, taking into account the technical specifications of the proposed connection. To make an enquiry, please email connections@transgrid.com.au. We will respond to your enquiry in accordance with National Electricity Rules.

Available Capacity for Generation - FAQ

1. What is available capacity for generation?
The available capacity for generation is an estimated MW value which can be connected to a particular busbar in Transgrid's existing network.

2. How is available capacity for generation determined?
The available capacity for generation at a particular busbar is determined based on network thermal and/or voltage limitations under system normal conditions. This capacity was assessed using a single technical scenario, which includes specific assumptions about the network configuration, demand levels, and system operation. In this scenario interconnectors were assumed to be neither importing nor exporting to NSW. The actual amount of generation that can be connected may vary depending on the type of generator, its operating characteristics, and future changes to the network.

3. Does available capacity consider proposed network developments?
The assessment was done based on the existing 2025 network configuration. Generator connections in the connection process were not considered in the assessment.

4. What busbars are considered for generation capacity?
Generation capacity at 220 kV and 330 kV busbars have been considered. Generator connections can be connected to busbars or voltages not included in this assessment.

5. Can I connect a larger generator than the available capacity value or at a different connection point?
To obtain accurate information about what can be connected to Transgrid's network, the formal connection process must be followed. A connection enquiry starts the formal connection process. Each enquiry is reviewed on an individual basis, taking into account the technical specifications of the proposed connection. To make an enquiry, please email connections@transgrid.com.au. We will respond to your enquiry in accordance with National Electricity Rules.

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For all enquiries regarding the Transmission Annual Planning Report and for making written submissions, contact tapr@transgrid.com.au.

Historic Load Trace Data