Use of energy storage in the distribution network to mitigate the effect of centralized photovoltaic production

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Supervisor:
Dr. Hartmann Bálint
Department of Electric Power Engineering

The electrical power system’s structure is changing fundamentally because the decentralized generation is gaining more and more attention worldwide instead of the traditional centralized generation. This transformation has numerous advantages, for instance the renewable energy resources are spreading all over the world, which is one of the most significant effect owing to the distributed generation. Hungary has also decided to increase the share of renewable energy. Nevertheless both decentralized generation and the using of renewable energy resources create new problems in the whole power system. These mostly affect the distribution system and arise from the nature of stochastic generation as well the distribution system’s attributes.

In my thesis, the negative impacts of centralized photovoltaic generation is investigated. Firstly, I create a medium voltage distribution system model in DIgSILENT PowerFactory which is suitable to analyze the effect of centralized photovoltaic production. This model is based on real system parameters. Secondly, I create steady-state simulations with the use of Digsilent Programming Language. As a result I compare the centralized photovoltaic impacts as a function of the main parameters of photovoltaic production. Considering these negative effects, I use an energy storage strategy to mitigate these impacts.

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