Power system design of an office building

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Supervisor:
Novák Balázs
Department of Electric Power Engineering

The topic of the BSC thesis was to design the medium voltage feeding and the low voltage main distributor of an officebuilding. For this task, the built-in power of the installed loads were available.

In the second chapter I illustrated, what important considerations must be taken into account during transformer selection. I presented the most important parameters of the loads. After the calculation of the power need, I chose the appropriate transformer, then I gave an overview of the transformer.

In the third chapter I analyzed the connection types to the medium voltage public power distribution grid, then I designed the switching diagram of the medium voltage switchgear. Thereafter I performed the appropriate calculations for medium-voltage device selection, and then I presented my choice of equipment. At the end of the chapter I prepared the single-line diagram and the frontal drawing of the selected medium-voltage switchgear.

In the fourth chapter I defined the low-voltage main distribution device’s switching mode and defined the required operating and fault parameters for the device selections. With the known operation and fault parameters, I selected the type of the main distribution device and the switchgears. In order to correct the power factor I selected reactive compensating units for the main busbars. At the end of the chapter I prepared the single-line diagram and the frontal drawing of the main distribution device.

In the fifth chapter, after determining the cable route, I chose the proper cables and busbars in the knowledge of the rated parameters. I presented the shielded busbars I used, then after performing the calculations, I chose the type of the shielded busbars which supply the loads in each floor. I chose the proper protection of the busbars. At the end of the chapter I prepared the single-line diagram of the two busbars.

The designed circuit int he thesis will not be realized, but my scaling results are useable for building with similar built-in power of the installed loads.

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