Hamed Zekri

  Abstract

 The increasing penetration of DG in the power systems has changed the concept of the distribution networks. In traditional distribution networks, the costs of these networks were allocated only to demand customers, not generation because these networks were viewed as serving demand only. In this sense, traditional distribution networks were considered passive networks unlike transmission networks which serve both generation and demand and have always been considered active networks. The introduction of DG transforms a distribution network from a passive network into an active network.

 Present tari ff s schemes at distribution level have been conceived using the traditional concept of distribution. These tari ff s have been designed for networks which only have loads connected. These tari ff s that normally average costs among network users are not able to capture the real costs and benefits of some customers like DG. Consequently, traditional tari ff s schemes at the distribution level can a ff ect the competitiveness of DG and can actually stop its development.

 In this work a cost-causality based tari ff is proposed for distribution taking into account new distribution networks tend to be active networks. Two methodology based on the same philosophy used for transmission pricing are used. The first is nodal pricing for distribution networks, which is an economically e ffi cient pricing mechanism with which there is a great deal of experience and confidence from its use at transmission level. The second is an extent-of-use method for the allocation of fixed costs that uses marginal changes in a circuit’s current flow with respect to active and reactive power changes in nodes, and thus was called Amp-mile method. The proposed schema for distribution pricing results to give adequate price signals for location and operation for both generation and loads. This tariff schema considers the benefits of DG presence in distribution networks, and increases its revenue rather than classic tariff design. In fact, under the proposed tariff design, DG has rewarded for its contribution in line losses and usage reduction.

    When: Date: Tuesday September 14^th Time: 17:30

  Where: Electronic Research Center