The 2.0 Cost Benefit Analysis and its Application to the National Development Plan 2017 - Methodology for evaluating electricity grid projects' benefits: current status and further improvements

摘要

Since 2005, Terna have applied a technical-economic evaluation of the main electrical infrastructure planned in the National Development Plan by using a Cost-Benefit methodology based on the comparison of discounted costs and benefits. That evaluation have allowed the profitability index (IP) estimation in order to quantify and qualify the system utility. On 2013, Terna have undertaken a review of the Cost-Benefit methodology for the infrastructure evaluation in order to improve the information transparency. The new methodology (called ACB 2.0) has been deliberated on 4th November 2016 b y the National Authority (AEEGSI 627/16/eel/r) and it is resulted in the following set of documents and actions: 1. Annex n.3 to the NDP 2015: Development of the Cost-Benefit Analysis; 2. Appendix C to the AEEGSI's Consultation Document dated 1st October 2015 and related Terna's feedbacks dated 3rd February 2016; 3. ENTSO-E's Guideline for Cost Benefit Analysis of Grid Development Projects dated February 2015; 4. ACER opinion n.01/2014 dated 30 January 2014 regarding Guideline for Cost Benefit Analysis of Grid Development Projects ENTSO-E; 5. ENTSO-E's Guideline for Cost Benefit Analysis of Grid Development Projects, version dated 29 July 2016 published and submitted to ACER. The ACB 2.0 has been applied the 1st time to the NDP 2017 evaluating for all the investment projects - which CapEx is more than 25 M{EUR} - the benefits for the electrical system. The first section of the paper provides an introduction on the perimeter of the analysis and the identification of benefit category, including the way to monetize them (where applicable). The second section presents the methodology applied to a few study cases, identifying benefits and its evaluation, System Utility Index (SUI similar to the known PI) and Net Present Value (NPV). The third section deals with the area in which Terna is investigating to catch further benefits introducing new category of benefits (not only electrical) that can be monetized in a next future. The last part of the paper includes some concluding remarks.