Title: Network-cost-loss-allocation methods evaluation under the perspective of the social welfare theory

Authors: P.M. De Oliveira-De Jesus, M.T. Ponce de Leao, H.M. Khodr

Addresses: Electrical and Computer Department, Faculdade de Engenharia da Universidade do Porto (FEUP) Instituto de Engenharia de Sistemas e Computadores (INESC Porto), Dr. Roberto Frias, 378 4200–465, Porto, Portugal. ' Electrical and Computer Department, Faculdade de Engenharia da Universidade do Porto (FEUP) Instituto de Engenharia de Sistemas e Computadores (INESC Porto), Dr. Roberto Frias, 378 4200–465, Porto, Portugal. ' Instituto de Engenharia de Sistemas e Computadores (INESC Porto), Rua Dr. Roberto Frias, 378 4200–465, Porto, Portugal; Universidad Simon Bolivar, Valle de Satenejas, Caracas, Ap. 89000, Venezuela

Abstract: Different ex post methodologies have been proposed to allocate network losses. Under day-ahead pool-based electricity markets, the implementation of these procedures implies an access-pricing framework based on half-hour or hourly locational prices. Since every allocation procedure modifies the locational prices in a different way, the initial market equilibrium point is altered as a result of the price elasticity of demand. This implies that some form of cross-subsidy appears among market agents, affecting economic variables as social welfare and network remuneration. This paper aims to contribute to the regulatory assessment by means of an analysis based on the social welfare theory in order to ensure a non-discriminatory access to the network. A base scenario is obtained through an optimal power flow study with the purpose of simulating an efficient energy market, and four allocation philosophies have been considered: incremental, roll-in-embedded, tracing based and circuit based. The methodology has been tested in two test cases: an illustrative three-bus network and the IEEE RTS 24-bus test network.

Keywords: electricity markets; loss allocation; power losses; power system economics; social welfare; network losses; network remuneration; regulatory assessment; power flow optimisation.

DOI: 10.1504/IJGEI.2007.014922

International Journal of Global Energy Issues, 2007 Vol.28 No.1, pp.11 - 31

Published online: 20 Aug 2007 *

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