Review of the Swedish Network Performance Assessment Model
2008 (English)Report (Other academic)
The Swedish energy agency (STEM), has developed a new regulatory model to supervise the revenues of the Distribution System Operators (DSO), referred to as the Network Performance Assessment Model (NPAM). The fundamental idea of the NPAM is that the electrical distribution system provides customer values, and the DSO is allowed to collect revenue corresponding to these values. The NPAM calculates customer values for a fictive electrical distribution system, with a total cost referred to as the Network Performance Assessment (NPA). The allowed debiting rate for a DSO is defined by the quotient of the revenue and the NPA. If the debiting rate is higher than a certain value, defined by the Energy Market Inspection (EMI) at STEM, the DSO is placed under review and could be forced to pay back revenue to customers. A lawsuit is currently in progress on this use of the NPAM, which has highlighted drawbacks in the model. This paper provides a comprehensive presentation of the NPAM. It describes in detail the different input data for the model, the steps in the calculations and the resulting cost factors. The paper also presents for the first time details on the theory underlying the calculations.
Place, publisher, year, edition, pages
2008. , 9 p.
Electrical Distribution System, Regulatory model, Network Performance Assessment Model, NPAM, Customer value, Outage cost, Probability, Performance-based regulation, Redundancy, Reference networks, Monte Carlo simulation and Reliability
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-8309OAI: oai:DiVA.org:kth-8309DiVA: diva2:13595
This paper was included in a licentiate thesis, but later rejected. A later version of this paper is accepted:
http://kth.diva-portal.org/smash/record.jsf?parentRecord=diva2:433030&pid=diva2:415658 (inluded in a PhD thesis)