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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Voltage magnitude deviations in a low-voltage distribution network due to increase in impedance of Y-connected load node to ground and unbalanced load
 Blažek, Ondřej ; Paar, Martin (referee) ; Drápela, Jiří (advisor)
This work deals with the issue of an unbalanced power load of a three-phase main load and the associated network load of a PEN conductor. The introduction discusses the various types of systems where the distribution networks are implemented. Followed by the description of network segments causing issues discussed in this paper. The theoretical part discusses the possible operating conditions which lead to balancing the flow of neutral current, also shows the relation of the size of countervailing power charges and the form of the network load. There are also hints of possible risks that the mentioned situations may cause to the network operation in terms of function and safety. The practical part deals with the mathematical simulation model created in MATLAB. There are simulations based on which there is a description of the network behavior for the cases of induced adverse factors. The conclusion summarizes the most important results and findings produced by the simulations.
Detailed record
Voltage magnitude deviations in a low-voltage distribution network due to increase in impedance of Y-connected load node to ground and unbalanced load
 Blažek, Ondřej ; Paar, Martin (referee) ; Drápela, Jiří (advisor)
This work deals with the issue of an unbalanced power load of a three-phase main load and the associated network load of a PEN conductor. The introduction discusses the various types of systems where the distribution networks are implemented. Followed by the description of network segments causing issues discussed in this paper. The theoretical part discusses the possible operating conditions which lead to balancing the flow of neutral current, also shows the relation of the size of countervailing power charges and the form of the network load. There are also hints of possible risks that the mentioned situations may cause to the network operation in terms of function and safety. The practical part deals with the mathematical simulation model created in MATLAB. There are simulations based on which there is a description of the network behavior for the cases of induced adverse factors. The conclusion summarizes the most important results and findings produced by the simulations.
Detailed record
Neutral conductor loading in distribution systems. Origin and effect.
 Valkoun, Petr ; Krejčí,, Petr (referee) ; Drápela, Jiří (advisor)
This work deals with an origin of the harmonic currents, their classification into symmetrical components and their influence on neutral conductor in distribution systems. It analyses the heat strain increase in distribution cables and distortion of supply tension in consequence of harmonic zero component flows in distribution system and it provides possibilities of neutral conductor overload and break-in protection.
Detailed record

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