Komponentuppdelning av elnätetpå lokalnivå

Sammanfattning: Sweden will, in accordance with the EU-directive 2003/54/EC, move from post-regulating the electricity power grid-tariffs by using a fictitious grid, to a regulation in advance which uses the actual power grid as a starting point. For this purpose a component breakdown of the grid needs to be made to determine the value of the network and by that the tariff price that is reasonable for the network business in question to charge. The primary breakdown criteria is the voltage-level and type of region. Voltage-level is crucial for the cost and complexity of a grid-part, because the higher the voltagelevel is, there are more and stricter laws and rules to follow. This work is limited to the distributionpart of the grid, in other words voltage levels from 20 kV and below. The type of region is crucial to the type of components you can and want to use. In city environments both overhead-wires and independent substations are undesirable for both practical, safety and aesthetic reasons. Overhead-wires is more common in rural areas, where it´s not economically justifiable to use ground-cable, so the cheaper air-alternative is chosen. An interference in a city environment is also much more costly than one in a urban or rural setting, which is crucial for a component's value. The value of an existing substation in a city environment is much higher than a station of similar nature in the countryside. The components that are taken into account are overhead-wires, ground-cables and substations. These come in a variety of aberrations that are used as preconditions for the grouping of components. Based on the components actual presence in the network and their electrical properties they are divided into groups, which together with type of region and voltage-level can determine the component's actual value and thus be able to give a value to the power-grid in question.