Erweiterung und Vergleich von Leistungsflusszerlegungsmethoden

Abstract

The European transmission grid is characterized by a highly meshed grid structure and a comprehensive network of several transmission system operators. These connections mean that power flows occurring in one market region also affect other regions due to line impedances and the load situation in the system. Furthermore, additional power flow control systems such as phase-shifting transformers and high-voltage direct current lines have been installed in recent years and will be installed on a larger scale in the future. Based on the operational concepts applied, these elements will lead to additional power flows that can have a burdening or relieving effect on the assets of the system. A classification of the various partial power flows defined by ENTSO-E is extended in this work and then used to map the effects of individual generator-load pairs and the power flow-controlling equipment in the grid in a uniform and systematic way.

Due to the possible negative effects on the transmission capacities, the quality and quantity of the different flow types are determined in the work depending on the calculation method. It is necessary to compare the different algorithms, as each method is based on different mathematical descriptions of the flow types and uses different simplifications to separate the power flow. In this paper, Full Line Decomposition, Power Flow Coloring and Power Flow Decomposition are explained and compared. An important factor is the extension of the methods to recognize the influences of phase-shifting transformers and
high-voltage direct current lines. Therefore, all three methods are extended so that the extended flow categories can be calculated with each method. The advantages and disadvantages of the individual methods are then worked out and a
recommendation for the application of the algorithms is made.