CIRED 2011RT 5b
description
Transcript of CIRED 2011RT 5b
CIRED 2011RT 5b
TSO-DSO co-ordination of planning for wind connections
Tony HearneManager, Renewable Planning ESB Networks
Frankfurt (Germany), 6-9 June 2011
Topics
Utility Landscape in Ireland Wind situation in Ireland Group processing Gate 3 Conclusions
Frankfurt (Germany), 6-9 June 2011
Topics
Utility Landscape in Ireland Wind situation in Ireland Group processing Gate 3 Conclusions
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
Transmission Transmission 6,300 km of Overhead Network6,300 km of Overhead Network 140km of Underground Cables140km of Underground Cables 165 HV Stations165 HV Stations
€€1B RAB Value 1B RAB Value
DistributionDistribution 160,000 km of Lines/Cables160,000 km of Lines/Cables 630 HV Substations630 HV Substations 230,000 MV Transformers/Units230,000 MV Transformers/Units 2m meters2m meters
€€5B RAB Value 5B RAB Value
Transmission
400kV 220kV 110kV
38kV
MV 20 kV & 10 kV
Distribution
LV 400 & 230 V
110kV
220kV
400kV 20kV
10kV
Frankfurt (Germany), 6-9 June 2011
Topics
Utility Landscape in Ireland Wind situation in Ireland Group processing Gate 3 Conclusions
Frankfurt (Germany), 6-9 June 2011
Frankfurt (Germany), 6-9 June 2011
Wind Connections MW
1460 MW c1250
3990
System Demand 2020
Frankfurt (Germany), 6-9 June 2011
0
10
20
30
40
50
60
00
:00
01
:30
03
:00
04
:30
06
:00
07
:30
09
:00
10
:30
12
:00
13
:30
15
:00
16
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18
:00
19
:30
21
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22
:30
%
Time
Wind generation as % of system demandMonday 5th April 2010
%
Frankfurt (Germany), 6-9 June 2011
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
Gate Size [MW] YearTake up of
offers
1 370 2005 100%
2 1385 2007 100%
3 3900 2011 Offers issue nearing
completion
Frankfurt (Germany), 6-9 June 2011
Connected: Blue
In Progress: Red
Being Quoted: Green
Frankfurt (Germany), 6-9 June 2011
Topics
Utility Landscape in Ireland Wind situation in Ireland Group processing Gate 3 Conclusions
Frankfurt (Germany), 6-9 June 2011
Example of Sequential Approach
110kV
38kV
MV
110/38kV Stn
38kV/MV Stn
38kV/MV Stn
38kV
38kV
Frankfurt (Germany), 6-9 June 2011
110kV
38kV
MV
?
110/38kV Stn
38kV/MV Stn
38kV/MV Stn
38kV
38kV
Example of Sequential Approach
Frankfurt (Germany), 6-9 June 2011
110kV
38kV
110/38kV Stn
38kV/MV Stn
38kV/MV Stn
110kV
38kV
Example of Group Approach
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
Topics
Utility Landscape in Ireland Wind situation in Ireland Group processing Gate 3 Conclusions
Frankfurt (Germany), 6-9 June 2011
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
Network MWNumber of
Connections
Distribution 1941 127
Transmission 2050 28
Frankfurt (Germany), 6-9 June 2011
Size of Gate 3
22
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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
Application Capacity
Node Rule
Less than 5 MW Nearest 38 kV
5 MW – 10 MW Nearest 38 kV or 110 kV
10 MW – 40 MW Nearest 110 kV
40 MW – 177 MW New 110 kV
Greater than 177 MW
New 220 kV or 400 kV
Tx Node 1
Tx Node 2
Frankfurt (Germany), 6-9 June 2011
DSO and TSO
DSO
TSO
Gate 3 General TSO-DSO Process
Node Assignment
Establish Tx Firm Access Quantities
Determine Distribution connection methods
Report to TSO
Tx SC and other studies
Connection Agreement
Issue DSO offers
Issue Tx offers
Frankfurt (Germany), 6-9 June 2011
◦ 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.
Transmission Firm access quantities
Frankfurt (Germany), 6-9 June 2011
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
Grid development strategy to 2025
http://www.eirgridprojects.com/
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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 ?
Frankfurt (Germany), 6-9 June 2011
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