1. Public workshop: CBA 3.0 –come and improve with us the transmission and storage assessment methodology
Brussels
07 November 2017

2. Organisation of the workshop

3. Organisation of the workshop

4. Purpose of the workshop
Why start CBA 3 with a public workshop?
Good experience including „external“ parties in the CBA 2 process
For CBA 3: starting from the very beginning with help of external experts
Defining together the way of working and core indicators
Purpose of this workshop
To bring all the parties to the same level of knowledge
To define the core issues
To organise the future work on CBA 3

5. 2nd CBA guideline – indicator overview

6. 2nd CBA guideline – Storage projects
Storage is a main part of CBA
Principle: no discrimination between storage and transmission
Changes since CBA 1
Storage is moved from annex to chapter
Improved consistency in computation of storage/transmission
System flexibility indicator: ‘tailor- made’ computation for storage projects

7. Internal projects Challenges Changes since CBA 1
Benefits of internal projects with small impact on cross-border flows are underestimated, because internal congestions are not taken into account
included a separate section on internal projects
considering internal congestions
using redispatch simulations
using fictive market areas (for modelling purpose only)

8. B1. Socio-economic welfare
Variation in variable cost of generation (generation cost savings)
cheaper units are made available by transmission projects
reduction of marginal cost (prices) difference
decreasing overall system costs
Partly included in B1 (SEW):
reduced generation costs due to renewables with zero marginal costs
reduced generation costs due to reduced CO2 emissions
Indicator directly given as monetary value

9. RES integration benefits
B2. RES integration
Separately reported as one of the EU targets
Monetary value partly included in B1
reduced costs due to RES integration
Additional value (no double counting)
RES integration benefits
included in B1
additional value
given in € under B1 as generation cost savings
qualitative indicator
Improvements
development of concepts for monetising the additional value

10. B3. Variation in CO2 emissions
Separately reported as one of the EU targets
Monetary value partly included in B1
reduced costs due to RES integration
Additional value (no double counting)
CO2 variation benefits
included in B1
additional value
given in € under B1 as generation cost savings (due to emission-cost component in generation costs)
qualitative indicator
Improvements
development of concepts for monetising the additional value

11. B4. Variation in losses Changes since CBA 1
New projects change the network topology and flows, resulting in a change in losses
Projects may decrease or increase losses!
Changes since CBA 1
Mandatory monetization of losses
Calculation of losses should be representative for pan-European system

12. B5/B6/B7: Security of supply
2nd CBA methodology introduces a new indicator structure for security of supply
Old security of supply-related indicators:
B1: security of supply
B6: technical resilience
B7: robustness/flexibility

13. B5. Additional adequacy margin
Variation in energy not served (ENS; in [MWh / yr])
Monetisation based on VOLL
Additional adequacy margin (in [MW]):
Pmax,A
Pmax,B

14. B6. System flexibility
Contribution of transmission capacity to enhance the ability of the system to deal with increased ramping requirements

15. B6. System flexibility (continued)
The maximum hourly ramp of residual load (maximum absolute value in MW at the 99.9 percentile in respective time series) R0,max;
The existing GTC value in MW given as GTCold;
The remaining maximum hourly ramp of residual load (equal to maximum hourly ramp of residual load – existing GTC) defined as
𝑅 𝑟,𝑚𝑎𝑥 = 𝑅 0,𝑚𝑎𝑥 − 𝐺𝑇𝐶 𝑜𝑙𝑑
∆GTC for the new project .

16. B7. System stability
Element
Transient Stability
Voltage Stability
Frequency Stability
New AC line ++
New HVDC
+ (between sync areas)
AC line series compensation +
AC line high temperature conductor / conductor replacement (e.g. duplex to triplex) -
AC line Dynamic Line Rating
MSC/MSR (Mechanically Switched Capacitors/Reactors)
SVC
STATCOM
Synchronous condenser
-: Adverse effect: the technology/project has a negative impact on the respective indicator.
0: No change: the technology/project has no (or just marginal) impact on the respective indicator.
+: Small to moderate improvement: the technology/project has only a small impact on the respective indicator.
++: Significant improvement: the technology/project has a big impact on the respective indicator.
N/A: Not relevant: if a particular project is located in a region where the respective indicator is seen as not relevant, this should also be highlighted by reporting N/A.

17. CBA 3.0 contect and expectations
Why do we need a 3rd CBA guideline?
To take into account the feedback
To look at how we can broaden the CBA benefits
*why not already covered in CBA 2?*
long approval process (with tight time tables)
CO2 variation benefits
included in B1
additional value
given in € under B1 as generation cost savings (due to emission-cost component in generation costs)
qualitative indicator
Benefits due to reduced congestion:
included in CBA 2 for internal projects what about the CB?

18. Timeline for CBA 3 for TYNDP 2020
2017 end November – end May developing and drafting the new methodology together with the stakeholders
2018 June final version for public consultation
2018 June – September public consultation of the draft CBA 3.0
2018 September – October ENTSO-E updates the methodology in line with the stakeholders comments
2018 December start of official approval process by sending the CBA 3.0 to ACER
2019 March ACER delivers its opinion to ENTSO-E and EC
2019 June EC releases its official opinion
2019 November CBA 3.0 official approval by the EC.
2020 January application of CBA 3.0 to the TYNDP 2020.

19. What has to be discussed?
Defining the most important improvements
capturing more benefit indicators
improving „critical“ indicators (e.g. SEW, SoS, Storage projects)

20. What has to be „decided“?
main improvements we have to concentrate on
how we want to work together
defining a time table and TORs
next steps