GENERATION HEAT MAP

Accessing our generation heat map and downloadable data

Our generation availability heat map is designed to give you a high-level indication (red/amber/green) of our network’s capability to facilitate new connections.

In addition to a web view, you can also access free, downloadable network data sets. This data is updated monthly and provides important guidance and assumptions to be aware of when considering a new connection. All data was correct at the point in time it was produced. A full design study will be required before any connection offer can be made.

To access our generation heat map and downloadable data, accept the ‘Terms and Conditions’ below and click ‘Continue’. If you have any questions, you can email our team.

Network constraints

We are seeing a significant increase in volumes of new connections applications at both the transmission and distribution level and are aware that our customers may be facing long delays and increased costs as a result of constraints on the transmission network that will require major reinforcement works and could impact on their ability to connect to our distribution network.

We are committed to working with NGET, NGESO and those customers directly impacted to explore all possible solutions and to being open and transparent about what we know.

We are updating our network availability heat maps with information on known constraints at the affected Grid Supply Points (GSPs). We will review this information on a monthly basis and update it when we receive outcomes from National Grid, so that our customers can make more informed choices about how and where to connect.

The NGET website features further information on transmission constraints and reinforcement works required in our region nationalgridet.com/pre-application.

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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Availability

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Medium

Low

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Supply points

Grid

Bulk

Primary

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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):

The lower voltage busbars of the substation.

Upstream Nominal Voltage (kV):

The higher voltage circuits feeding the substation.

The lower voltage busbars of the substation

Downstream Overall Classification:

The RAG status of the lower voltage busbars of the substations

Potential for new Substation (MVA):

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.

Fault Level(%):

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.

Worst-Case Tap Position :

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:

Voltage Constraint Issue:

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:

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:

The RAG status of the higher voltage circuits feeding the substations

Voltage constraint issue:

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):

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.

NGET Statement of works required (MVA):

Connection requests above the capacity shown will require a SOW request.

Upstream Constraints Levels (MVA):

The higher voltage circuits feeding the substation.

Firm Capacity

Load (MVA):

Maximum / Minimum Load

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

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

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)

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 (MVA):

Valid Until:

Contracted Generation Connections (MVA):

Connection Date:

Location Data

(Latitude,Longitude):

Postcodes served:

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CONNECTIONS ENQUIRIES

0800 011 3433

getconnected@northernpowergrid.com

MON - FRI:

8am - 8pm

SAT:

9am - 5pm

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GENERATION HEAT MAP

Accessing our generation heat map and downloadable data

Network constraints