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Simulation of Broken Conductor in Distribution Network by ATP-EMTP Program
Pacula, Václav ; Novotný, Jan (referee) ; Paar, Martin (advisor)
When broken conductor will impact on the ground. In isolated networks to ground fault occurs. For fault detection is the most commonly used method of zero-sequence voltage. The principle of the method is the sum of the voltage in all phases in the symmetric systém is the sum zero. The aim is to compare this method with the method of symmetrical sequence method and timeshiftomg. The method of symmetrical sequences compares sequency currents. To change the status of the systemis changed period, this method is based on the time shift.For comparison is used the ATP-EMTP program, that simulates the electrical transients. In this program are designed network model in which, these methods are investigated. It is a simple model of an idealized model and part of distribution network. After the simulation waveforms of events are processed and the results found faultdetection. Protection used today are based on measurements of zero-sequence voltage. A newer method of protection that extends further the possibility of detection and localization.
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High Speed Transients Modelling
Bukvišová, Zuzana ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
This thesis deals with the high speed transient modelling in the electrical networks. The introduction of this work discusses mathematical models of the individual devices used in the system and focuses on the line representation. It also contains a more detailed description of Bergeron and frequency dependent line model. The objective of this thesis is to design a network model using ATP-EMTP simulation program. In this model, the switching overvoltage caused by shunt reactor switching and lightning overvoltage are simulated. The thesis thoroughly describes the settings of the components used in the model of analysed network and in conclusion evaluates obtained simulation results in a relation to the insulation coordination.
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High Speed Transients Modelling
Bukvišová, Zuzana ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
This thesis deals with the high speed transient modelling in the electrical networks. The introduction of this work discusses mathematical models of the individual devices used in the system and focuses on the line representation. It also contains a more detailed description of Bergeron and frequency dependent line model. The objective of this thesis is to design a network model using ATP-EMTP simulation program. In this model, the switching overvoltage caused by shunt reactor switching and lightning overvoltage are simulated. The thesis thoroughly describes the settings of the components used in the model of analysed network and in conclusion evaluates obtained simulation results in a relation to the insulation coordination.
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Simulation of Broken Conductor in Distribution Network by ATP-EMTP Program
Pacula, Václav ; Novotný, Jan (referee) ; Paar, Martin (advisor)
When broken conductor will impact on the ground. In isolated networks to ground fault occurs. For fault detection is the most commonly used method of zero-sequence voltage. The principle of the method is the sum of the voltage in all phases in the symmetric systém is the sum zero. The aim is to compare this method with the method of symmetrical sequence method and timeshiftomg. The method of symmetrical sequences compares sequency currents. To change the status of the systemis changed period, this method is based on the time shift.For comparison is used the ATP-EMTP program, that simulates the electrical transients. In this program are designed network model in which, these methods are investigated. It is a simple model of an idealized model and part of distribution network. After the simulation waveforms of events are processed and the results found faultdetection. Protection used today are based on measurements of zero-sequence voltage. A newer method of protection that extends further the possibility of detection and localization.
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