This diploma thesis discusses the impact a change of network configuration has on surplus of active and reactive energy that is pushed in HV network, on losses per feeder and voltage drops on nodes. The model of network was created in programming package Matpower, based on a real distribution network of Elektro Ljubljana. The measurements that were used for power flow were also real measurements for the year 2020.
In the area of electric transformation station Črnomelj, which is discussed in the thesis, there are four feeders that have many renewable energy sources. Therefore, pushing of surplus energy into electric transformation station and HV network occurs. To decrease pushing of redundant energy, the separation point between feeders was moved in simulation, thus the network of configuration changed, in order to use as much electricity as possible in MV network. First simulation was carried out for normal state in the year 2020. Then, the separation point was moved between feeders. New locations for separation points were determined in advance, based on experience. New simulations were executed annually, monthly, weekly and on daily basis. At the end of the diploma thesis, the best order of operation in regard to pushing redundant electricity to HV network, losses per feeder and voltage drops on nodes, was defined.
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