DAPR Map 2018

About this map

This mapping portal forms part of our Distribution Annual Planning Report (DAPR) (5.0MB) and presents:

  • the topology of our regulated network, including transmission network connection points, substations, sub-transmission network, and distribution feeders.
  • forecast loads for transmission network
  • connection points, forecast loads and capacity information for each of our substations and sub-transmission feeders
  • distribution feeders that are forecast to have capacity constraints in the next 2 years
  • sub-transmission & substation constraints that are forecast to emerge in the next 5 years.

As a Distribution Network Service Provider (DNSP), we are required to publish this information under Rule 5.13 and Schedule 5.8 of the National Electricity Rules (NER).

Forecast Information

Bulk Supply Forecasts

Peak Load Forecast and Capacity Tables

These tables show information about the substation’s customer category, transformer capacity, including emergency cyclic capacity and normal cyclic capacity, load at risk, and the compliance of each substation with its security standard.

Definition of Terms - Feeder Capacity and Forecast Tables

Peak Risk Period

The time period over which the load is highest (Day/Night).

NCC Rating (MVA)

Normal Cyclic Capacity - the total capacity with all network components and equipment in service.

Contracted non-network (MVA)

The amount of embedded generation and contracted curtailed demand management capacity available within the supply area of a substation during peak times. The impacts of these have been incorporated into the load forecasts. Solar PV connections are not included in the reported figure.

10 PoE Load (MVA)

Peak load forecast with 10% probability of being exceeded (one in every 10 years will be exceeded). Based on normal expected growth rates and weather corrected starting loads.

LARn (MVA)

Security standard load at risk under system normal condition, expressed in MVA.

LARn (MW)

Security standard load at risk under system normal condition, expressed in MW.

Power Factor at Peak Load

Compensated power factor at 50 PoE Load.

ECC Rating (MVA)

Emergency Cyclic Capacity – the long term firm delivery capacity under a single contingent condition.

50 PoE Load (MVA)

Peak load forecast with 50% probability of being exceeded (one in every two years will be exceeded). Based on normal expected growth rates & weather corrected starting loads.

Hours PA > 95% Peak Load

The amount of load greater than 95% 50 PoE Load.

Raw LAR (MVA)

The amount of load exceeding ECC rating. (Load – ECC Rating)

2-Hour Rating (MVA)

Two Hour Emergency Capacity (2HEC) – the short term or firm delivery capacity under single contingency conditions.

Auto Trans Avail (MVA)

SCADA or automatically controlled load transfers that can be implemented within one minute.

Remote Trans Avail (MVA)

Load transfers that can be implemented through SCADA switching procedures by the network control officer. It is assumed that this can generally be achieved within 30 minutes.

Manual Trans Avail (MVA)

Load transfers can also be deployed via manually controlled switchgear locally by field staff.

Mobile Plant Avail (MVA)

The capacity of mobile substation or mobile generation that can be deployed within the timeframe and capacity prescribed by the security standard.

POPS

Plant Overload Protection Scheme (POPS) consists of several applications which continuously monitor specific items of plant for overload conditions. If overload conditions are detected and validated, POPS will initiate predefined actions in order to relieve the overload condition.

LARc (MVA)

Security standard load at risk for single contingent conditions.

LARc (MW)

Estimated generation / load reduction required to defer the forecast system limitation. This is the security standard load at risk under single contingency condition, expressed in MW.

Customer Category

For security standard application, the general type of customer a substation or feeder supplying the area.

For further information, please refer to Appendix E of Energex Distribution Annual Planning Report.

Zone Substation Forecasts

Peak Load Forecast and Capacity Tables

These tables show information about the substation’s customer category, transformer capacity, including emergency cyclic capacity and normal cyclic capacity, load at risk, and the compliance of each substation with its security standard.

Definition of Terms - Feeder Capacity and Forecast Tables

Peak Risk Period

The time period over which the load is highest (Day/Night).

NCC Rating (MVA)

Normal Cyclic Capacity - the total capacity with all network components and equipment in service.

Contracted non-network (MVA)

The amount of embedded generation and contracted curtailed demand management capacity available within the supply area of a substation during peak times. The impacts of these have been incorporated into the load forecasts. Solar PV connections are not included in the reported figure.

10 PoE Load (MVA)

Peak load forecast with 10% probability of being exceeded (one in every 10 years will be exceeded). Based on normal expected growth rates and weather corrected starting loads.

LARn (MVA)

Security standard load at risk under system normal condition, expressed in MVA.

LARn (MW)

Security standard load at risk under system normal condition, expressed in MW.

Power Factor at Peak Load

Compensated power factor at 50 PoE Load.

ECC Rating (MVA)

Emergency Cyclic Capacity – the long term firm delivery capacity under a single contingent condition.

50 PoE Load (MVA)

Peak load forecast with 50% probability of being exceeded (one in every two years will be exceeded). Based on normal expected growth rates & weather corrected starting loads.

Hours PA > 95% Peak Load

The amount of load greater than 95% 50 PoE Load.

Raw LAR (MVA)

The amount of load exceeding ECC rating. (Load – ECC Rating)

2-Hour Rating (MVA)

Two Hour Emergency Capacity (2HEC) – the short term or firm delivery capacity under single contingency conditions.

Auto Trans Avail (MVA)

SCADA or automatically controlled load transfers that can be implemented within one minute.

Remote Trans Avail (MVA)

Load transfers that can be implemented through SCADA switching procedures by the network control officer. It is assumed that this can generally be achieved within 30 minutes.

Manual Trans Avail (MVA)

Load transfers can also be deployed via manually controlled switchgear locally by field staff.

Mobile Plant Avail (MVA)

The capacity of mobile substation or mobile generation that can be deployed within the timeframe and capacity prescribed by the security standard.

POPS

Plant Overload Protection Scheme (POPS) consists of several applications which continuously monitor specific items of plant for overload conditions. If overload conditions are detected and validated, POPS will initiate predefined actions in order to relieve the overload condition.

LARc (MVA)

Security standard load at risk for single contingent conditions.

LARc (MW)

Estimated generation / load reduction required to defer the forecast system limitation. This is the security standard load at risk under single contingency condition, expressed in MW.

Customer Category

For security standard application, the general type of customer a substation or feeder supplying the area.

For further information, please refer to Appendix E of Energex Distribution Annual Planning Report.

Transmission Feeder Forecasts

Peak Load Forecast and Capacity Tables

These tables show information about the feeder capacity, load at risk, and the compliance of each feeder with its security standard.

Interconnected or feeders that supply multiple customers are examined in the following tables. Feeders exclusively supplying a customer owned substation or dedicated to a customer are not included in these tables.

Definition of Terms - Feeder Capacity and Forecast Tables

NCC Rating (A)

Normal Cyclic Capacity - the total capacity with all network components and equipment intact.

10 PoE Load (A)

Peak load forecast with 10% probability of being exceeded (one in every 10 years will be exceeded). Based on normal expected growth rates and weather corrected starting loads.

Power Factor (System Normal)

Lowest power factor along the feeder at 10 PoE Peak Load.

LARn (A)

Security standard load at risk under system normal condition, expressed in Amps.

LARn (MW)

Security standard load at risk under system normal condition, expressed in MW, assuming the nominal system voltages and lowest power factor.

ECC Rating (A)

Emergency Cyclic Capacity – the long term firm delivery capacity under single contingency conditions.

50 PoE Load (A)

Peak load forecast with 50% probability of being exceeded (one in every two years will be exceeded). Based on normal expected growth rates & weather corrected starting loads.

Hours PA > 95% Peak Load

The forecast number of hours per annum where the load exceeded 95% of the peak 50 PoE demand.

Raw LAR (A)

The amount of load exceeding ECC rating. (Load – ECC Rating)

2-Hour Rating (A)

Two Hour Emergency Capacity (2HEC) – the short term firm delivery capacity under single contingency conditions.

Auto Trans Avail (A)

SCADA or automatically controlled load transfers that can be implemented within one minute. A blank entry indicates that this type of transfer is not considered as available in the evaluation of security standard compliance.

Remote Trans Avail (A)

Load transfers that can be implemented through SCADA switching procedures by the network control officer. It is assumed that this can generally be achieved within 30 minutes. A blank entry indicates that this type of transfer is not considered as available in the evaluation of security standard compliance.

Manual Trans Avail (A)

Load transfers can also be deployed via manually controlled switchgear locally by field staff. A blank entry indicates that this type of transfer is not considered as available in the evaluation of security standard compliance.

POPS

Plant Overload Protection Scheme (POPS) consists of several applications which continuously monitor specific items of plant for overload conditions. If overload conditions are detected and validated, POPS will initiate predefined actions in order to relieve the overload condition.

Mobile Gen Reqd (A)

The amount of generation required under the contingency, capped at the maximum MVA allowable under the security standard requirements.

LARc (A)

Security standards load at risk under single contingency condition, expressed in Amps.

LARc (MW)

Estimated generation / load reduction required to defer the forecast system limitation. This is the security standard load at risk under single contingency condition, expressed in MW, assuming the nominal system voltages and the lowest power factor on the feeder under system normal condition.

Customer Category

For security standard application, the general type of customer a sub-transmission, or transmission feeder is supplying.

Qualification on the information provided - for a given feeder:
  • If there is no Raw LAR forecast over the period reported:
    • Forecast:
      • 10 PoE forecast is shown;
      • 50 PoE is not shown; and
      • shown as blank for feeders not normally supplying load.
    • Rating:
      • NCC rating is shown; and
      • ECC and 2HEC ratings are not shown.
    • Transfers:
      • no details shown.
  • If there is forecast Raw LAR in any year over the period reported:
    • Forecast:
      • 10 PoE is shown in all years; and
      • 50 PoE is shown in years when Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.
    • Rating:
      • NCC is shown in all years; and ECC and 2HEC are shown in years when Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.
    • Transfers – Auto, Remote and Manual:
      • where available, details are provided in years where Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.
    • Load at Risk:
      • where available, details are provided in years where Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.

For further information, please refer to Appendix F of Energex Distribution Annual Planning Report.

Subtransmission Feeder Forecasts

Peak Load Forecast and Capacity Tables

These tables show information about the feeder capacity, load at risk, and the compliance of each feeder with its security standard.

Interconnected or feeders that supply multiple customers are examined in the following tables. Feeders exclusively supplying a customer owned substation or dedicated to a customer are not included in these tables.

Definition of Terms - Feeder Capacity and Forecast Tables

NCC Rating (A)

Normal Cyclic Capacity - the total capacity with all network components and equipment intact.

10 PoE Load (A)

Peak load forecast with 10% probability of being exceeded (one in every 10 years will be exceeded). Based on normal expected growth rates and weather corrected starting loads.

Power Factor (System Normal)

Lowest power factor along the feeder at 10 PoE Peak Load.

LARn (A)

Security standard load at risk under system normal condition, expressed in Amps.

LARn (MW)

Security standard load at risk under system normal condition, expressed in MW, assuming the nominal system voltages and lowest power factor.

ECC Rating (A)

Emergency Cyclic Capacity – the long term firm delivery capacity under single contingency conditions.

50 PoE Load (A)

Peak load forecast with 50% probability of being exceeded (one in every two years will be exceeded). Based on normal expected growth rates & weather corrected starting loads.

Hours PA > 95% Peak Load

The forecast number of hours per annum where the load exceeded 95% of the peak 50 PoE demand.

Raw LAR (A)

The amount of load exceeding ECC rating. (Load – ECC Rating)

2-Hour Rating (A)

Two Hour Emergency Capacity (2HEC) – the short term firm delivery capacity under single contingency conditions.

Auto Trans Avail (A)

SCADA or automatically controlled load transfers that can be implemented within one minute. A blank entry indicates that this type of transfer is not considered as available in the evaluation of security standard compliance.

Remote Trans Avail (A)

Load transfers that can be implemented through SCADA switching procedures by the network control officer. It is assumed that this can generally be achieved within 30 minutes. A blank entry indicates that this type of transfer is not considered as available in the evaluation of security standard compliance.

Manual Trans Avail (A)

Load transfers can also be deployed via manually controlled switchgear locally by field staff. A blank entry indicates that this type of transfer is not considered as available in the evaluation of security standard compliance.

POPS

Plant Overload Protection Scheme (POPS) consists of several applications which continuously monitor specific items of plant for overload conditions. If overload conditions are detected and validated, POPS will initiate predefined actions in order to relieve the overload condition.

Mobile Gen Reqd (A)

The amount of generation required under the contingency, capped at the maximum MVA allowable under the security standard requirements.

LARc (A)

Security standards load at risk under single contingency condition, expressed in Amps.

LARc (MW)

Estimated generation / load reduction required to defer the forecast system limitation. This is the security standard load at risk under single contingency condition, expressed in MW, assuming the nominal system voltages and the lowest power factor on the feeder under system normal condition.

Customer Category

For security standard application, the general type of customer a sub-transmission, or transmission feeder is supplying.

Qualification on the information provided - for a given feeder:
  • If there is no Raw LAR forecast over the period reported:
    • Forecast:
      • 10 PoE forecast is shown;
      • 50 PoE is not shown; and
      • shown as blank for feeders not normally supplying load.
    • Rating:
      • NCC rating is shown; and
      • ECC and 2HEC ratings are not shown.
    • Transfers:
      • no details shown.
  • If there is forecast Raw LAR in any year over the period reported:
    • Forecast:
      • 10 PoE is shown in all years; and
      • 50 PoE is shown in years when Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.
    • Rating:
      • NCC is shown in all years; and ECC and 2HEC are shown in years when Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.
    • Transfers – Auto, Remote and Manual:
      • where available, details are provided in years where Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.
    • Load at Risk:
      • where available, details are provided in years where Raw LAR is forecast and shown as blank in years where no Raw LAR is forecast.

For further information, please refer to Appendix F of Energex Distribution Annual Planning Report.

Distribution Feeders Forecasts

For the 11 kV feeder studies, the 50 PoE and 10 PoE load forecasts are assessed based on the 2017 winter and 2017/18 summer starting values, and include some load transfers expected from approved project proposals as at June 2018. The forecast winter loads are for the winter season following the summer quoted in that financial year. The 50 PoE load forecasts and the normal cyclic capacity of feeder rating are then used to determine limitations. Where projects have been approved to augment a feeder, the augmented rating has been used in the analysis. Permanent remediation strategies to correct network limitations beyond those resolved via approved projects have not been modelled in the study as these are developed year by year.

Instead of load at risk calculations, the analysis compares feeder utilisation under normal conditions against the acceptable levels of utilisation specific to each feeder. The target utilisation assigned to each feeder depends on its configuration, with radial feeders tending to have higher utilisations of about 80% and balanced three feeder meshes such as those typically found in the CBD having target utilisations of 67%. This approach accommodates the different purposes to which feeders may be employed (e.g. dedicated to single point customer loads, ties or dual feeders). This utilisation is calculated according to the following:

  • Utilisation (Normal Conditions) = 50 PoE Load / NCC Rating

The conditions used to determine security are as follows:

  • If Utilisation > Target Utilisation  site does not meet security standard Projects have been put in place to address all feeders with loads beyond their NCC rating.
General Information
Legend
Constrained zone substations
Bulk supply points
Zone substations
Sub-transmission lines
Constrained Feeder 11 kV
Constrained Feeder 33 kV
Feeder 33 kV
Constrained Feeder 110/132 kV
Feeder 110 kV
Feeder 132 kV

Note:

  • Data applies to the current year only. Data will be updated annually in line with the release of the Distribution Annual Planning Report (DAPR) (5.0MB).
  • Some data layers may need to be enabled, or are only available at certain zoom levels. Please see Layer options
Layers

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