Cired 2011rt 5b
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CIRED 2011RT 5b. TSO-DSO co-ordination of planning for wind connections. Tony Hearne Manager, Renewable Planning ESB Networks. Topics. Utility Landscape in Ireland Wind situation in Ireland Group processing Gate 3 Conclusions. Topics. Utility Landscape in Ireland

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CIRED 2011RT 5b

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Cired 2011rt 5b

CIRED 2011RT 5b

TSO-DSO co-ordination of planning for wind connections

Tony Hearne

Manager, Renewable Planning

ESB Networks


Topics

Topics

  • Utility Landscape in Ireland

  • Wind situation in Ireland

  • Group processing

  • Gate 3

  • Conclusions


Topics1

Topics

  • Utility Landscape in Ireland

  • Wind situation in Ireland

  • Group processing

  • Gate 3

  • Conclusions


Main players in ireland

Regulator

Transmission System Operator

Transmission System Planner

Distribution System Operator

Distribution System Planner

Transmission and Distribution Asset owner

CER

EirGrid

EirGrid

ESB Networks

ESB Networks

ESB

Main Players in Ireland


System operator structures

System Operator Structures

  • ESB Group

    • Generation- Customer supply

    • Consultancy

  • Eirgrid PLC

    • TSO

      • Plan Tx network

      • Contol access to Tx network

      • Operate Tx network

    • SEMO

      • Operate wholsale energy market

  • ESB Networks Ltd

  • TAO

  • DAO

  • DSO


Cired 2011rt 5b

Transmission

Distribution

MV

20 kV & 10 kV

LV

400 & 230V

220kV

400kV

400kV

220kV

110kV

110kV

38kV

20kV

10kV

  • Transmission

  • 6,300 km of Overhead Network

  • 140km of Underground Cables

  • 165 HV Stations

  • Distribution

  • 160,000 km of Lines/Cables

  • 630 HV Substations

  • 230,000 MV Transformers/Units

  • 2m meters

€1B RAB Value

€5B RAB Value


Topics2

Topics

  • Utility Landscape in Ireland

  • Wind situation in Ireland

  • Group processing

  • Gate 3

  • Conclusions


Wind connections mw

Wind Connections MW

System Demand 2020

3990

1460 MW

c1250


History to date

History to date

  • Up to 2003 applications for connection of wind to both System Operators were processed sequentially

  • Since 2004, following a moratorium on wind connections, such is the volume of applications in the queue, that a Group Processing Approach [GPA] was the only practical way forward.

  • They are now processed in batches known as Gates


Cired 2011rt 5b

Connected:Blue

In Progress:Red

Being Quoted: Green


Topics3

Topics

  • Utility Landscape in Ireland

  • Wind situation in Ireland

  • Group processing

  • Gate 3

  • Conclusions


Example of sequential approach

Example of Sequential Approach

MV

38kV

38kV/MV Stn

38kV

38kV

110/38kV Stn

38kV/MV Stn

110kV


Example of sequential approach1

Example of Sequential Approach

MV

?

38kV

38kV/MV Stn

38kV

38kV

110/38kV Stn

38kV/MV Stn

110kV


Example of group approach

Example of Group Approach

110kV

38kV

38kV

38kV/MV Stn

110/38kV Stn

38kV/MV Stn

110kV


Cired 2011rt 5b

Sequential processing

Large applicants tend to apply to TSO, smaller ones to DSO

The connection method is determined solely on the basis of their connection

Applicants pay for their dedicated works

Interracting offers can cause withdrawal of offers already in train

Group Processing

Applications are processed by the SO most suited to their Group connection irrespective of which SO they originally applied to.

The connection method is determined by the Least Cost technically Acceptable [LCTA] method for the defined sub-group

Applicants pay in full for their dedicated shallow works and a per MW share of shared shallow works

No Interaction issues within Gates


General operation of a gate

General operation of a “Gate”

  • Regulator [with input from both System Operators and wind industry] determine criteria for eligibility for inclusion of “Gate”

  • TSO and DSO jointly apply criteria to the “Queue” of application

  • Queue comprises both DSO and TSO applicants

  • Result: Make up of “Gate” is determined


Topics4

Topics

  • Utility Landscape in Ireland

  • Wind situation in Ireland

  • Group processing

  • Gate 3

  • Conclusions


Implementation of gate 3

Implementation of Gate 3

  • The implementation of Gate 3 required very close collaboration between CER, TSO and DSO.

  • The following slides will endeavour to explain the steps, mechanisms and features involved


Size of gate 3

Size of Gate 3

22


1 eligibility criterion

1: Eligibility criterion

  • Full consultation held with industry and stakeholders

  • Result: Date order of applications the clear preference from the wind industry

  • CER Direction issued to System Operators including MW size of the Gate

  • Implementation commences

  • Unified “queue” formed by combining separate SO queues

  • Cut-off criterion applied

In

Out


What next

What next?

  • Now we know who is in and out!

  • To begin their studies, TSO need to know how much generation will present at their transmission nodes

  • In order to inform this, DSO would normally carry out full studies on the smaller applicants to determine which transmission node

  • To shorten timeframe as much as possible it was necessary to frontload the node assignments


2 node assignments

2: Node Assignments

  • Banded rule-set devised based upon distance to nearest distribution primary sub-station

  • Clauses put in place to define “nearest”

  • Result: Transmission sub-groups formed

Tx Node 1

Tx Node 2


Gate 3 general tso dso process

Gate 3 General TSO-DSO Process

TSO

Issue Tx

offers

DSO and TSO

Tx SC and

other studies

Establish Tx

Firm Access

Quantities

Node Assignment

Report to TSO

Connection Agreement

DSO

Determine Distribution

connection methods

Issue DSO offers


Transmission firm access quantities

Transmission Firm access quantities

  • Transmission System Operator calculates additional capacity available at each node for each future year.

  • Available capacity allocated based on application date-order

  • Each Gate 3 application will have a Scheduled Firm Access Quantity for each year from 2010 to 2025, taking account of grid reinforcements and other new generation

  • Thus, transmission reinforcement based on approved development strategy leads the wind generation connections.


Grid development strategy to 2025

Grid development strategy to 2025

http://www.eirgridprojects.com/

  • Takes account of:

    • demand growth

    • renewable generation to meet targets

    • conventional generation development

    • future DC interconnections with UK or Europe.

  • Will require

    ~ 1,150 km new transmission

    ~ 2,300 km upgrades


Project planning

Project Planning

  • Country divided in to ”Areas” for transmission study purposes

  • Detailed offer issuance Project Plan agreed between TSO, DSO and CER.

  • Project Plan published


Communications

Communications

  • Gate 3 Liaison Group meeting

    • chaired by Regulator

    • Attended by both SO ‘s and representatives of all industry stakeholders

    • SO’s report on progress per workplan

    • Other issues discussed as they emerge

  • Customer connection meetings

    • Held once distribution connection methods signed off

  • TSO-DSO bi-lateral meetings

    • Held bi-monthly or weekly


Questions

Questions ?

[email protected]


Conclusions

Conclusions

  • The circumstances in Ireland lend themselves to the TSO-DSO-Regulator approach outlined above

  • Facilitates large quantities of Renewable Energy being processed in a structured manner

  • Transmission and Distribution systems developed in co-ordinated fashion

  • Certainty of offer issuance to those in the Gate

  • Rationalises the allocation of scarce capacity


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