Anforderungen an die lokale Infrastruktur zur Steigerung der Eigenversorgung im Verteilnetz

Schwerdt, Patrick; Moser, Albert (Thesis advisor); Sauer, Dirk Uwe (Thesis advisor)

1. Auflage. - Aachen : printproduction (2021)
Book, Dissertation / PhD Thesis

In: Aachener Beiträge zur Energieversorgung 202
Page(s)/Article-Nr.: xi, 180 Seiten : Illustrationen, Diagramme

Dissertation, RWTH Aachen University, 2020

Abstract

The possible integration of renewable-based generation plants into the distribution grid and the expected increase of controllable consumers provide the opportunity to balance generation and consumption actively starting on lower voltage levels of the electricity supply system. Various research projects show that by balancing generation and consumption as locally as possible, interregional transport requirements can be reduced. Therefore, the aim of this thesis is to investigate the infrastructure requirements to increase self-supply at the medium and low-voltage level in addition to present interregional studies. For this purpose, a multi-stage optimization method was developed. The method designs for a given supply area and a specified minimum degree of self-supply the required generation plants and storage facilities as well as the medium and low-voltage grid, at minimum cost. Thereby, the infrastructure design is carried out using a greenfield approach and under consideration of a bottom-up balancing mechanism. In a first step, the required generation plants are determined and integrated as close as possible to the consumer based on an average-linkage cluster analysis. Based on this, the storage facilities and the distribution grid are dimensioned bottom-up. Again, the cluster analysis of the average linkage and a genetic algorithm are applied. The exemplary investigations based on a rural supply area show that additional costs of between 1.6 ct and 2.7 ct per kWh of self-supply are needed for the required storage facilities and grid. These additional costs increase with the specified minimum degree of local self-supply. Overall, the concept of "balancing generation and consumption as locally as possible" leads to higher costs at the local level compared to more centralized balancing at the medium-voltage level.