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Generation Availability Map

Terms and Conditions

The generation availability map provides an indication of the networks capability to connect large-scale developments to Major Substations. The main assumptions are:

  • The data is provided as an indication only.
  • The constraints shown are based on existing generation commissioned on the network and accepted generation assumed to be operating at maximum export capacity.
  • The data provides information on accepted but not yet connected generation, and any valid quoted generation.
  • Each primary has been given an overall classification based on the known constraints for that area. Connections to the primaries with an overall RED/AMBER classification are still possible, however there might be a requirement for significant network reinforcement to overcome the impact on the network constraints.

Information last updated December 2017. 
Legal disclaimer: We have developed the generation availability map to assist you with connections applications in constrained areas. They give a general illustration of generation availability constraints only and cannot be relied upon to assess the terms of connection for specific premises. Nothing in this disclaimer limits or excludes our liability for (a) death or personal injury caused by our negligence; (b) fraud or fraudulent misrepresentation; or (c) any other liability that cannot be limited or excluded by applicable law. Subject to the above, we shall not be liable to you in tort (including negligence) or otherwise, arising under or in connection with your use of the generation availability map for: (a) loss of profits; (b) loss of sales or business; (c) loss of agreements or contracts; (d) loss of anticipated savings; (e) loss of or damage to goodwill; or (g) any indirect or consequential loss.

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MAP USER GUIDE

Use the icons to display areas of high, medium and low availability/demand.

Use the icons to display the specific supply types.

Roll over a supply type to see the post code it covers.

Click on a supply type to find out related information.

Choose to view downstream (availability)
or upstream (demand) information.

Substation Information
Name:
Downstream Nominal Voltage (kV): Not sure?
The lower voltage busbars of the substation.
Upstream Nominal Voltage (kV): Not sure?
The higher voltage circuits feeding the substation.
The lower voltage busbars of the substation
Downstream Overall Classification: Not sure?
The RAG status of the lower voltage busbars of the substations
Fault Level(%): Not sure?
This is the measure of the level of energy that could be supplied to a fault on the network. Our equipment is rated to withstand a given amount of fault level energy. Distributed Generation contributes to this energy during fault conditions and hence it has the potential to take it higher than the equipment is rated for.
Voltage : Not sure?
When generation exceeds the local demand on a primary substation, the excess power carries through the primary transformers to the upstream network for use elsewhere on the system. However, depending on the condition of the assets and tap changer capability the actual level of reverse power flow may be restricted to as low as 0% of the transformer rating. If the reverse power flow capability of a substation is 0% then the maximum distributed generation that can be connected to the substation is only the local demand served by it; as the additional power cannot be transferred to the upstream.
Reverse Power Flow Capability: Not sure?
When generation exceeds the local demand on a primary substation, the excess power carries through the primary transformers to the upstream network for use elsewhere on the system. However, depending on the condition of the assets and tap changer capability the actual level of reverse power flow may be restricted to as low as 0% of the transformer rating. If the reverse power flow capability of a substation is 0% then the maximum distributed generation that can be connected to the substation is only the local demand served by it; as the additional power cannot be transferred to the upstream.
Voltage Constraint Issue: Not sure?
This constraint indicates if there are any voltage issues on the substation after adding a generation connection on to the circuits feeding the substation.
Physical Constraints: Not sure?
This constraint indicates if there are any physical issues on the primary substation for a generation connection. Examples of physical constraints are the availability of spare switchgear or space for additional switchgear and if the existing switchgear on the primary substation can be extended to accommodate the new generation capacity.
The higher voltage circuits feeding the substation
Upstream Overall Classification: Not sure?
The RAG status of the higher voltage circuits feeding the substations
Voltage constraint issue: Not sure?
This constraint indicates if there are any voltage issues on the substation after adding a generation connection on to the circuits feeding the substation.
Potential for new upstream Feeder (MVA): Not sure?
This is an indication of maximum generation that could be connected on the lower side of the substation based on reverse power capability of the transformers but would be subject to detailed design studies and any constraint on the upstream network.
Potential for new Substation (MVA): Not sure?
This is an indication of maximum generation that could be connected on the higher side of the local substation subject to thermal and voltage rise limitations on the circuit.
NGET Statement of works required (MVA): Not sure?
Connection requests above the capacity shown will require a SOW request.
Upstream Constraints Levels (MVA): Not sure?
The higher voltage circuits feeding the substation.
Firm Capacity
Load (MVA):
Maximum / Minimum Load Not sure?
This is the power flow and has been indicated by Maximum (Max)/Minimum (Min) MVA values. The Max value is the maximum demand on the primary substation and the Min value is the minimum demand left on the primary substation after deducting the existing distributed generation. A negative minimum value indicates the existing amount of reverse power flow already flowing through the primary transformers.
Maximum (MVA):
Minimum (MVA):
Existing Generation Not sure?
Indicates the amount of existing distributed generation already connected when the availability maps were last updated. Note the existing generation does not include small-scale generation or any outstanding or quoted distributed generation capacity.
Downstream (MVA):
Upstream (MVA):
Fault Level Not sure?
This is the measure of the level of energy supplied to a fault on the network. Network plant is rated to withstand a given amount of Fault Level. Distributed Generation contributes energy during fault conditions in addition to the existing Fault level and hence increases it.
Break
Duty (kA):
Rating (kA):
Make
Duty (kA):
Rating (kA):
Transformer Rating (ONAN) Not sure?
The primary transformers normally have two ratings i.e. rating with forced cooling (OFAF) and rating with natural cooling (ONAN). The forced cooled rating is only used in emergency situation for short periods of time. To avoid overstressing the cooling equipment, Northern Powergrid policies dictates that the maximum amount of generation that we can connect on an unconstrained basis is dependent on the naturally cooled transformer rating of a single transformer.
Load (MVA):
Generation (MVA):
Additional Information
Quoted Generation Connections (KW):
Valid Until:
Contracted Generation Connections (KW):
Connection Date:
Location Data
(Latitude,Longitude):
Postcodes served: