Cormac Mc Carthy, Access Planning, EirGrid Liaison Group November - - PowerPoint PPT Presentation

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Cormac Mc Carthy, Access Planning, EirGrid Liaison Group November - - PowerPoint PPT Presentation

Nov 05, 2022 377 likes •622 views

Short Circuit Cormac Mc Carthy, Access Planning, EirGrid Liaison Group November 2013 EirGrid Short Circuit Review Can generators safely connect? Prioritise and sequence short circuit reinforcements Small generators, large lists of

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SLIDE 1

Short Circuit

Cormac Mc Carthy, Access Planning, EirGrid Liaison Group – November 2013

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SLIDE 2

EirGrid Short Circuit Review

  • Can generators safely connect?
  • Prioritise and sequence short circuit

reinforcements

  • Small generators, large lists of short circuit

associations

  • Graphical presentation of short circuit info
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SLIDE 3

Sample – Carrick on Shannon

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SLIDE 4
  • 1. Proposed Revision to Short

Circuit Associations

Short Circuit Review

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SLIDE 5

For illustrative purposes only

No accurate values in the following slides

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SLIDE 6

Short Circuit Associations - today

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

Next .. Reinforcements complete in 2013

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SLIDE 7

Associations – after Reinforcements Complete in 2013

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

Next .. Reduction in Future Short Circuit Levels

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SLIDE 8

Projected short circuit levels have fallen

  • Network optimisation

– Some reinforcements now not needed

  • Generator Technical Parameters

– Assumed Data is prudently conservative

  • Retirement of existing generators
  • Non take up of some connection offers
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SLIDE 9

Associations – after Reduction in Future Short Circuit Levels

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

Next .. Alignment of Associations with Reinforcement Optimisation

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SLIDE 10

Associations – after Alignment of Associations with Reinforcement Optimisation

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

Next .. Dominant Generators

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SLIDE 11

Associations – after Dominant Generators

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

Next .. Threshold Value

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SLIDE 12

Associations – after Threshold Value

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

Proposed Update to Short Circuit Associations

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SLIDE 13
  • 2. Reinforcement Delivery
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SLIDE 14

Progress in Reinforcement Delivery

  • Grouped by Station, reinforcements in six

stations are complete, in another three stations are approved. Another two stations, need is reducing or gone.

  • EirGrid to publish Target Completion Dates for

Reinforcements that are Short Circuit

  • Associations. Propose to Defer until after

communication of revised associations

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SLIDE 15
  • 3. Those that Remain Associated

but may be able to connect …

Using Existing Spare Short Circuit Capacity …

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SLIDE 16

Associated but may be ableo to connect …

  • Use existing spare short circuit capacity
  • Delivery of reinforcements and roll out of

generator connections

  • Letter of Comfort
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SLIDE 17

Use Existing Spare Short Circuit Capacity

  • Group processing changes what a short circuit

association means

– Safe to do so, fair to other generators

  • Generators may be able to connect before their short

circuit association is complete. Check with EirGrid!

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SLIDE 18

Using Existing Spare Short Circuit Capacity – a lot of these can connect without delay anyway – possibly all if generator roll out and reinforcement delivery align

Short Circuit Associations Generators with Offers

Limerick Shannonb 110 Maynooth 220 Killonan 110 Knockraha 110 Tarbert 220 Tarbert 110 Galway Kilbarry Marina Carrick on S Cashla

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SLIDE 19

Letters of Comfort

  • How do we handle those generators who still

have some associations but because of spare capacity and because of roll out rates of both reinforcements and generators, may be permitted to connect

  • Assessment and Letters of Comfort?
  • Need more information on programme of

generator connections / EirGrid review

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SLIDE 20
  • 3. Conclusion and Next Steps
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SLIDE 21

Conclusion

  • Reinforcements being approved and delivered
  • Projected short circuit levels are lower now
  • Recommend revised short circuit associations

– Several Refinements to the Approach allows removal of associations

  • Generators with remaining associations may be

able to connect in advance of short circuit associations being complete

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SLIDE 22

Next Steps and Timeline

  • Subject to Comments / Feedback on this

Presentation

– Do we wish to revise the short circuit associations?

  • Complete Assessment arising from Gate 3 take-

up / latest information and finalise Revised Short Circuit Associations,

  • End of Quarter 1, 2013
  • Communicate Revisions / Update Contracts
  • Publish Associated Reinforcement Completion

Dates

  • Communicate findings about Assessment re:

Letters of Comfort

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SLIDE 23