Today society is facing numerous challenges associated with energy management system. The centralized power generation system is depending on the fossil fuels to generate energy which is harmful to the environment, and it is unable to fulfill the rising demand for electricity. The decentralized power generation system could easily be integrated with renewable energy sources which could satisfy the growing demand for electricity without damaging the environment. This thesis explores the proper energy distribution system (smart grid) which could be fully equipped with the digitalized technology and be integrated with renewable energy sources and decentralized system. Peer-reviewed articles and government reports have been reviewed in order to get the impact of digitalized technology on overall energy management system, as well as the smart grid services commercialized through the business models. The result shows that the cost of transmission lines is reduced by using decentralized power generation system which helps to provide clean energy at low price to the end consumers. Furthermore, the thesis claims that smart grid is a disruptive technology which encourages energy producers and distributors to adopt a rapid change in the energy market along with changing their business model.  Finally, it has been explored that smart grid could provide three services, such as demand response, integration of renewable energy, and grid to vehicle services. These services could successfully be commercialized through business model innovation which enables energy providing and distributing firms to create and capture value regarding profit. / <p>Thanks for the great support who were involved in the completion of this project.</p>

This Master's degree thesis deals with the renewable energy sources regulation in the Czech Republic. It also mentions the European Union legislation on the topic and its development and focuses on the most important Directives and their goals as well as Member States' obligations. It presents Czech regulation in force and the conceptual documents in greater detail. It also points out the system of support available for the promotion in using the renewable sources of energy. Finally it examines the renewable energy sources of the small extent and the decentralized power generation as well.

This Master´s thesis deals with problematics related to the connection of new decentralized power sources into electrical power grid. Due to advantageous legislative support of these new, especially photovoltaic power sources, a massive amount of these sources have been connected into the power grid between years 2009 and 2010. For theoretical understanding of processes during a steady-state, the initial parts of this paper are focused on a procedure which solves steady-state on every power line mentioned. When we speak of decentralized power sources connection, it is necessary to mention the connected legislative. National distribution grid operators in collaboration with national regulatory commission have decided on a legislative document Rules of distribution grid operation, which puts a set of demands and requirements on applicants wishing to connect a new power source to the grid. The text of this thesis is focused mainly on demands required after the latest change in 1/2010. Practical part of this work deals with verification of new power source influence on a related power grid and meeting the legislatively required demands. The most important demands are voltage change due to new power source operation and its transfer to other voltage levels, higher harmonics injection, power output fluctuation and last, not least, changes in load flow directions. For reasons previously mentioned an analysis is made and possibilities of reducing or removing of these influences are introduced. To achieve these goals, two computer programs, Siemens Sinaut Spectrum and NetCalc are used.