Principles of cost-benefit analysis
Article 66
1. HVDC system owners, DC-connected power park module owners and DSOs, including CDSOs, shall assist and contribute to the cost-benefit analysis undertaken according to Article 65 and 80 and provide the necessary data as requested by the relevant system operator or relevant TSO within three months of receiving a request, unless agreed otherwise by the relevant TSO. For the preparation of a cost-benefit-analysis by a HVDC system owner or DC-connected power park module owner, or their prospective owner, assessing a potential derogation pursuant to Article 79, the relevant TSO and DSO, including CDSO, shall assist and contribute to the cost-benefit analysis and provide the necessary data as requested by the HVDC system owner or DC-connected power park module owner, or their prospective owner, within three months of receiving a request, unless agreed otherwise by the HVDC system owner or DC-connected power park module owner, or their prospective owner. 2. A cost-benefit analysis shall be in line with the following principles: (a) the relevant TSO, or HVDC system owner or DC-connected power park module owner, or their prospective owner, shall base its cost-benefit analysis on one or more of the following calculating principles: (i) the net present value; (ii) the return on investment; (iii) the rate of return; (iv) the time needed to break even. (b) the relevant TSO, or HVDC system owner or DC-connected power park module owner, or their prospective owner, shall also quantify socioeconomic benefits in terms of improvement in security of supply and shall include at least: (i) the associated reduction in probability of loss of supply over the lifetime of the modification; (ii) the probable extent and duration of such loss of supply; (iii) the societal cost per hour of such loss of supply. (c) the relevant TSO, or HVDC system owner or DC-connected power park module owner, or their prospective owner, shall quantify the benefits to the internal market in electricity, cross-border trade and integration of renewable energies, including at least: (i) the active power frequency response; (ii) the balancing reserves; (iii) the reactive power provision; (iv) congestion management; (v) defence measures. (d) the relevant TSO shall quantify the costs of applying the necessary rules to existing HVDC systems or DC-connected power park modules, including at least: (i) the direct costs incurred in implementing a requirement; (ii) the costs associated with attributable loss of opportunity; (iii) the costs associated with resulting changes in maintenance and operation.