This dissertation provides an analysis of Island Prelude based on a method of analysis prescribed by the composer. The method, Energy Line Analysis, is essential to an enlightened performance. The content of this dissertation includes: biographical information, compositional influences, Joan Tower style periods, her works involving the oboe in a major role, and an Energy Line Analysis chart of Island Prelude. Island Prelude represents Joan Tower's musical language, the understanding of which is essential in an interpretation of her music.

This thesis deals with steady running and short-circuit conditions in the 110 kV network, E. ON, fed from 110 kV Otrokovice. Substation Otrokovice ensures system transformation from 400 kV to 110 kV system through three transformers. In order to increase reliability of power supply and improved economy is considered to bridge the transition from the operation of two transformers in bridge operations of the three transformers. However, this brings with it significant worsening of short-circuit conditions in the 110 kV network. The task of this work is to evaluate and compare the two variants of operation in terms of steady running and short-circuit conditions in the network at 110 kV and then implement operational and technical measures. The introduction describes the electricity system and its parts. The theoretical part of the paper discusses ways of dealing with steady running and short circuit conditions of long lines. Practical part will deal with applications of knowledge on the network. The conclusion summarizes the most relevant information and the results assessed both variants.