Nordic Capacity Calculation Methodology (CCM) Stakeholder … · 2018. 8. 3. · Submission of CCM proposal to NRAs Sept 17 Nordic DA CCM operationalized Q3 18 Go-live DA CCM Q1-Q2

Nordic Capacity Calculation Methodology

(CCM) Stakeholder Group meeting

December 1, 2016

Copenhagen airport

http://www.fingrid.fi/en/

Agenda 1. Welcome, tour de table, objective and agenda (9.00-9.20)

2. Status update of the Nordic CCM project and timeline (9.20-9.50)

3. CCM proposal process (9.50-10.20)

4. Coffee break (10.20-10.40)

5. Cap. Calc. methodology and preliminary FB results (10.40-11.20)

6. Preliminary FB simulation results: market simulations (11.20-11.40)

7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)

9. Method for the CNTC CCM (13.00-13.30)

10. Common Grid Model (CGM) used in the capacity calculation (13.30-14.00)

11. Market information platform and market information tool (14.00-14.30)

12. Coffee break (14.30-14.50)

13. Open discussion (14.50-15.30)





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)



Latest developments

The project has been redefined From Flow-Based Capacity Calculation Methodology Project ID CCM is formally included

CNTC is formally included

CCM Proposal process formally included

Development of industrialized CC tool is shifted to the RSC

The FB-prototype is now fully developed, but not fully implemented Final GSK strategy not implemented

FRMs calculated, but not included

Operators are consulted, not personally involved

Adjustment and learning process is ongoing Continuous FB capacity calculations from week 01-2016 (Ex week 24-28)

Threshold on CNEs implemented from week 40 → Relaxed domains

Not operational domains yet, data quality is an issue • Error detection and corrections in the preliminary IGMs/CGMs

• Error detection and corrections on CNE definitions


The quality of the preliminary CGM is an

issue which will be solved by the CGMES

AC Load flow 63%

Data corrupt

18%

Missing hours 11%

Unknown method

7%

DC Load flow 1%

AC and DC load flow:

results with sufficient quality

Unknown method:

AC or DC load flow (earlier

script did not recognized

this)

Missing hour:

No CGM data model

Data corrupt:

The CGM, the FB prototype

data or the PX have

identified errors

71 % sufficient quality data ≈ 2700 hours for week 1-23


CNE definition is a learning process

Critical Network Elements (CNEs) are used for defining current NTCs in an operator-driven process

Current CNEs are used in the prototype tools

Operators makes choices based on best practice and experience (and there are different practices between the TSOs)

Not a "one-to-one" relation between the defined CNEs and the resulting NTCs

FB and CNTC is establishing a common mathematical approach for Calculating market capacities

The relation between current CNEs and NTCs are revealed, and overloads are detected

Non-relevant CNEs are revealed

The need for new CNEs are revealed


2020

Today

2016 2017 2018 2019 2020

Submission of CCM proposal to NRAs

Sept 17

Nordic DA CCM operationalized

Q3 18

Go-live DA CCM

Q1-Q2 19

Go-live ID CCM

2020

Oct 16 – Dec 17 Weekly Cap.Calc. & Welfare analyses (FB/NTC/CNTC preliminary CGM)

Q1/18 – Q3/19 Develop the DA CCM into an operational procedure

Q3/18 – Q3/20 Prepare go-live of the ID CCM

CCM high-level project timeline

Weekly and daily parallel market runs (Final CGM) Q1/18 – Q4/19

Oct 16 – Sept 17 CCM proposal

Domain experts Operators

CGM-ES D-2

RSC develops industrialized DA tool

RSC develops industrialized ID tool

CGM-ES ID

Oct 16 – Dec 17

2017 – 2019

Q1 18 – Q4 18

Q1 19 – Q4 20

CC

M P

roje

ct

Rel

ate

d P

roje

cts

TEST

VER

SIO

N


Recap: From an NTC- to a FB market

coupling

FB constraints: Σi(PTDFi * NPi) – Margin ≤ 0 Only one valid NTC matrix

Line Margin PTDF area A PTDF area B PTDF area C

A -> B 1000 MW 33 % - 33 % 0

B -> C 1000 MW 33 % 67 % 0

A -> C 1000 MW 67 % 33 % 0

A

C

B

67 %

33 %

NTC constraints: Flowij - NTCij ≤ 0 Many valid NTC matrixes

Line Max flow

A -> B 750 MW

B -> C 750 MW

A -> C 750 MW

However, physical flows follows patterns given by electric resistance in the grid

1000 MW

0,1 0,1

0,4

0,2

0,2

But not all of the physics are considered by flow based – GSKs changes over time due to external conditions and require changes in the PTDFs

GSKs

PTDF factor

PTDF factor

Line Max flow

A -> B 900 MW

B -> C 900 MW

A -> C 250 MW

Line Max flow

A -> B 0 MW

B -> C 1000 MW

A -> C 1000 MW


Recap: Valid market solutions in FB and

NTC

Net position A

Net position B 1000

1000

1500

1500

1000

2000

Limited by BC

Limited by AC

Limited by AB

A

C

B

1500 MW

1000 500

1500 MW

500

A

C

B

2000 MW

1000 1000

1000 MW 1000 MW

0

ATC domain

FB domain


Recap: Many valid market solutions in NTC

A

C

B

750 750

750

A

C

B

250 900

900

A

C

B

1000 1000

0

NTC values





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)



Two documents to be prepared for NRA

approval

Legal binding document on proposal for CCM

legally binding requirements related to the selected methodology

Supporting document:

Proposal and reasoning of proposal

Impact assessment

Results of public consultation

This document will be consulted on


CCM proposal timeline

2017

Today

Sep Nov 2017 Mar May Jul Sep

Stakeholder Forum

Feb 8

Supporting document ready

Feb 21

Workshop (Stakeholder Forum)

Apr 19

Public consultation completed

May 15

Legal CCM proposal ready + internal consultation document

Jun 30

Stakeholder Forum

Sep 7

Submission of final CCM proposal to NRAs

Sep 18

Sep 1 - Feb 21 Develop supporting document

Feb 22 - Mar 28 Internal TSO consultation and approval of proposed CCM

Apr 3 - May 15 Public consultation

Apr 3 - Jun 30 Develop the legal CCM proposal (legally-binding

document)

Jul 3 - Aug 18 Internal TSO consultation

Aug 21 - Sep 18 Finalization of the CCM

proposal and MSG approval

Jul 1 - Aug 15 Holiday


Outline of supporting document

Impact assessment of proposal • On CACM objectives, cf. article 3 • Description of FB and CNTC • Assessment on relevant issues (Comparing FB/CNTC/NTC, ++)

CCM proposal: • Legal obligation • Proposal of the DA and ID CC methodologies • Timescale for the implementation

Introduction • Introduction and executive summary

The document is expected to contain three main sections + annex:

Annex


CCM proposal (1/3)

Headline Content

Legal obligation

- Reproduction of CACM Article 20 – 26 - Interpretation of the wording of the articles

Timescale for the implementation

- Describing the steps between the day of proposal submission to NRA’s and the day for: - DA CCM go live - ID CCM go live

Presentation of Methodologies

- Presentation of CCM methodologies - To some degree a reproduction of the FB technical report, including new relevant

material + CNTC description

Headline Content

Introduction - Intro and executive summary


CCM proposal (2/3)

Headline Content

Proposal of the methodology

For Flow based and CNTC in a DA and ID time frame: - Detailed description of the capacity calculation approach: 1. a mathematical description of the applied capacity calculation approach with different capacity calculation

inputs; 2. rules for avoiding undue discrimination between internal and cross-zonal exchanges 3. rules for taking into account previously allocated cross-zonal capacity; 4. rules on the adjustment of power flows on critical network elements or of cross-zonal capacity due to remedial

actions 5. for the flow-based approach, a mathematical description of the calculation of power transfer distribution

factors and of the calculation of available margins on critical network elements; 6. for the coordinated net transmission capacity approach, the rules for calculating cross-zonal capacity, including

the rules for efficiently sharing the power flow capabilities of critical network elements among different bidding zone borders;

7. where the power flows on critical network elements are influenced by cross-zonal power exchanges in different capacity calculation regions, the rules for sharing the power flow capabilities of critical network elements among different capacity calculation regions in order to accommodate these flows.

- Methodologies for the calculation of the inputs to capacity calculation will include the following parameters: 1. a methodology for determining the reliability margin; 2. the methodologies for determining operational security limits, contingencies relevant to capacity calculation

and allocation constraints; 3. the methodology for determining the generation shift keys; and 4. the methodology for determining remedial actions to be considered in capacity calculation


CCM proposal (3/3)

Headline Content

Proposal of the methodology

8. Validation methodology (both DA and ID) 9. Intraday reassessment frequency 10.Fallback procedure (both DA and ID)


Impact assessment of proposal (1/2)

Headline Content

Introduction - Approach to demonstrating impact

Impact on the objectives of the CACM GL

- An assessment of the impact on the objectives of the CACM GL, article 3: - promoting effective competition in the generation, trading and supply of electricity; - ensuring optimal use of the transmission infrastructure; - ensuring operational security; - optimising the calculation and allocation of cross-zonal capacity; - ensuring fair and non-discriminatory treatment of TSOs, NEMOs, the Agency, regulatory

authorities and market participants; - ensuring and enhancing the transparency and reliability of information; - contributing to the efficient long-term operation and development of the electricity transmission

system and electricity sector in the Union; - respecting the need for a fair and orderly market and fair and orderly price formation; - creating a level playing field for NEMOs; - providing non-discriminatory access to cross-zonal capacity.

Approach: - outline our understanding of definition of each of the objectives - do the assessment based on our definition


Headline Content

Quantitative impact indicators

- Socioeconomic welfare of FB per country/per bidding zone per element (PS, CS, CR)

- Impact on capacity domains and cross bidding zone exchange - Spot prices - Selected cases illustrating impact and benefit (in case FB is the selected

methodology)

Qualitative impact indicators

- xx

Cost of implementation and operation

- Assessment of costs of implementing FB and/or CNTC will be presented. If additional costs compared with reference, these will go into CBA (maybe qualitative reasoning)

Impact assessment of proposal (2/2)


Annex – consultation of stakeholders

Headline Content

Consultation questions

Outcome of the consultation

- Replies by each stakeholder to consultation questions - Gather replies and present them in form in order to get an overview for the CCM

project

Reasoning for the final proposal

- What has been taken into account and what is not





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)






4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)


Nils slides are here and will show automatically in show mode





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)



Recap: Objective function of the Price coupling

Euphemia

Same price coupling algorithm in both FB and NTC

MAX Welfare =

Subject to constraints

Consumer surplus

Producer surplus

Congestion revenue

Example of an exchange from a low price area to a high price area


Welfare economic results for Week 1-23

• Week 10 and 12 is excluded due to lack of data

• Days 4/1, 20/1, 21/1, 23/1, 1/2, 19/2, 2/5, 3/5, 4/5 and 15/5 are excluded due to poor quality in data

• Hours with FB-flow exceeding the max NTC on DC interconnectors due to a topology error in the PX Simulation Facility are excluded (~600 h)

-5,000

-4,000

-3,000

-2,000

-1,000

0

1,000

2,000

3,000

4,000

5,000

-20

-15

-10

-5

0

5

10

15

20

25

Nordic Tota

l [kE

UR

]

SEW

per

Sta

keh

old

er [

MEU

R]

Nordic socio-economic welfare , FB compared to NTC

Congestion rent Producer surplus Consumer surplus Total

-1,000

-800

-600

-400

-200

0

200

400

600

800

1,000

-20

-15

-10

-5

0

5

10

15

20

1 2 3 4 5 6 7 8 9 11 13 14 15 16 17 18 19 20 21 22 23

Tota

l [kE

UR

]

SEW

per

Sta

keh

old

er [

MEU

R] Nordic socio-economic welfare per week, FB compared to NTC

Congestion rent Producer surplus Consumer surplus Total


Average prices and net position in

Week 1-23

• Week 10 and 12 is excluded due to lack of data • Days 4/1, 20/1, 21/1, 23/1, 1/2, 19/2, 2/5, 3/5, 4/5 and 15/5 are excluded due to poor quality in data • Hours with FB-flow exceeding the max NTC on DC interconnectors due to a topology error in the PX Simulation

Facility are excluded (~600 h)

-6

-4

-2

0

2

4

6

Nordic Denmark Norway Finland Sweden[TW

h]

Net position per country

NTC

FB

0

5

10

15

20

25

30

35

[EU

R/M

Wh

]

Average price per bidding area

NTC

FB


Average Nordic FB and NTC price for

each hour, Week 1-23




-10

10

30

50

70

90

110

130

150

-10 10 30 50 70 90 110 130 150

NTC

, €/M

Wh

FB, €/MWh

Lower price with FB

Lower price with NTC


Average numbers of price areas per

Week 1-23

• Week 10 and 12 is excluded due to lack of data • Days 4/1, 20/1, 21/1, 23/1, 1/2, 19/2, 2/5, 3/5, 4/5 and 15/5 are excluded due to poor quality in data • Hours with FB-flow exceeding the max NTC on DC interconnectors due to a topology error in the PX Simulation

Facility are excluded (~600 h)

0

1

2

3

4

5

6

7

8

9

10

1 2 3 4 5 6 7 8 9 11 13 14 15 16 17 18 19 20 21 22 23

NTC

FB


0

20

40

60

80

100

120

140

160

180

200

0

10

0

20

0

30

0

40

0

50

0

60

0

70

0

80

0

90

0

10

00

11

00

12

00

13

00

14

00

15

00

16

00

17

00

18

00

19

00

20

00

21

00

22

00

23

00

24

00

25

00

26

00

Max

pri

ce -

min

pri

ce, €

/MW

h

Hours

NTC

FB

Zoom in on hours with no Nordic price difference

Price spread, Week 1-23 (max price – min price of Nordic BZs; ordering from high to low values)




Zoom in on 100 hours with the highest price spread

0

50

100

150

200

0 20 40 60 80

0,00

1,00

2,00

3,00

17

00

18

00

19

00

20

00

21

00

22

00





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)






4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)






4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)



Content

CNTC approach

Capacity calculation

Initialization

Steady state analysis

Dynamic analysis

Efficiently sharing the technical grid capacity on the borders

FB/CNTC comparison


CNTC approach

Coordinated net transfer capacity (CNTC) approach is an advanced and

highly automated version of current NTC

Calculations based on the CGM, basic AC load flow and dynamic

simulations

Aim to calculate maximum transmission capacity by taking into account

following items defined by TSOs

Contingencies

GSKs

Operational security limits

Remedial actions

Rules for efficiently sharing transmission capacity to different borders


Capacity calculation

Four phases

Initialization

Steady state analysis

Dynamic analysis

Efficiently sharing technical transmission capacity


Initial technical capacity calculation

Security

Domain

Initial calculation

of max flows on the

borders

Resulting NTC

(flow) domain

Flo

w/N

TC B

> C

Flow/NTC A > B

A

C

B

1000 1000

1000

1000 MW

1000 MW -1000 MW

-1000 MW

The initial calculation of the technical max flow on a border provides points at the edge/border of the Security Domain (illustrated by a linear domain)

The max technical flow on each border are not simultaneously available in a meshed grid

Provided as CNTC values allows physical flows to be outside the Security Domain

Base Case


From max flow on a border to CNTC

Security

Domain

Optimized and

secure CNTC

border values

Optimized NTC

(flow) domain

Flo

w/N

TC B

> C

Flow/NTC A > B

A

C

B

750 750

750

1000 MW

1000 MW -1000 MW

-1000 MW

A CNTC domain is calculated by an optimization procedure which is constrained by the security domain

Optimization rules: Capture the forecasted base case Optimize the total domain volume Optimize the domain volume around

the forecasted base case

The calculated CNTC values provides a secure CNTC (flow) domain -750 MW

-750 MW

750 MW

750 MW

Base Case


A

C

B

1000 0

1000

Any forecasted base case is obtainable

by CNTC

Security

Domain

Optimized NTC

(flow) domain

Flo

w/N

TC B

> C

Flow/NTC A > B

1000 MW

1000 MW -1000 MW

-1000 MW

The rule "capture the Base Case" will provide CNTC values that permits the base Case to be realized

Accurate forecasting is crucial (as it is in the current and all NTC solution)

If the base case is in a corner (see figure) the CNTC domain might be extremely narrow (NTC on B>C is zero)

Optimized CNTC

border values

Base Case





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)






4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)



Stakeholder Information Platform

Energinet Sharepoint site

• Initial content:

– Newsletters

– Meeting materials

– Reports

– Q&A section

• Upcoming content:

– Simulation results

– CCM consultation material

– SH tool


How to connect

https://projects360.energinet.dk/NCCM

To register: Send mail to Paul Sørensen [email protected]

Subject: User registration NCCM SH info platform

Content: • Name

• E-mail

• Telephone




mailto:[email protected]

Stakeholder Tool

Nordic CCM Stakeholder Group meeting

1 December 2016


Stakeholder Tool

Tool for examining the effect on flows/possible net

positions from PTDFs

CNEs are fully anonymized – randomized numbering

This is a first draft – comments/suggestions are welcome


Stakeholder tool


GUI - Test feasible net positions

cells that can be editted

the white cells indicate the Nordic synchronous area; the grey cells the DK1 synchronous area

the orange texts indicate that the cell value is computed from another. Indeed, this is applied for DC cables: the power injected on one side is emitted at the other

A check on the power balance in each synchronous area is performed;


GUI - Test feasible net positions If the net positions, that you entered, fit within the FB domain, the message that 'Transmission system not congested' appears. Otherwise, the message 'Transmission system congested' appears in red.

The net position, that you entered, appears in the Nordic map in bold. Above this value, the maximum net position (feasible within the FB domain) is shown. Below this value the min net position (feasible within the FB domain) is shown.

The border flows (according to the FB model), resulting from the net positions that you entered, are shown in the map.


FB parameters

the net positions that you filled in on the 'GUI'

the flows induced on the CNEs (PTDF matrix * net positions)

is the CNE congested? Or in other words: is the resulting flow larger than the RAM ( remaining available margin, the flow that is allowed to be used by the market transactions)?

the PTDF factors of the CNEs


Min/Max Net Positions & Border Flows

The tool includes information on Min/Max Net Position

per bidding zone

Not simultaneously feasible

The border flows (according to the FB model), resulting

from the net positions that you entered, are computed.

Those values are presented in the 'GUI'





4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)






4. Coffee break (10.20-10.40)



7. Discussion (11:40-12:00)

8. Lunch (12.00-13.00)




12. Coffee break (14.30-14.50)



Documents

Nordic Capacity Calculation Methodology (CCM) Stakeholder … · 2018. 8. 3. · Submission of CCM proposal to NRAs Sept 17 Nordic DA CCM operationalized Q3 18 Go-live DA CCM Q1-Q2