Deregulation of the European energy sector on individual segments including production, transmission and distribution of energy has brought fundamental changes to the planning of electric power systems. Compared to the traditional pre-deregulation energy companies the aim of the electricity transmission network planning process has changed considerably in the new environment. Social-economic welfare remains an important constraining factor; however, in the new environment a shift towards profit-maximization of grid investors is seen.
Considering the increasingly stringent environmental constraints for electricity transmission infrastructure and growing uncertainties (new climate and energy policies, growing penetration of renewable energy sources, etc.), it is vital to address these uncertainties in the transmission network planning process itself. Integration of uncertainties in the planning process represents risk reduction as an answer to negative consequences of possible wrong decisions. For this purpose standard approaches to network planning are to be adapted to the modern needs, with the introduction of new tools, models and planning approaches.
The thesis presents multi-scenario approach to network planning and its application on an actual part of the 110 kV transmission network of the Republic of Slovenia. In the first part of thesis the process of preparing the network development plan and comparison with the established planning process in transmission system operator of Slovenia is shown. In the second part of the thesis a modern approach to investment portfolio optimization according to business values of a transmission system operator is illustrated.
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