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The calculation of the short circuits of the given network
Bordovský, Lukáš ; Paar, Martin (referee) ; Toman, Petr (advisor)
The main aim of this Bachelor thesis is to introduce you a calculation of short-circuit rates in compliance with IEC 60909, and a subsequent calculation of a scheduled real network. The thesis itself is divided into two parts : a theory about the short-circuit problems and a simple model example are stated in the first part, in the second part is stated the calculation of the given real network for the case of an occurence of shunt faults at distribution points, namely a three-phase fault, a two-phase isolated fault, a double-phase-to-earth fault and a single phase fault. The work is coupled with a determination of current and voltage rates at points P and K. At the point P is situated distance protection relay and at the point K comes the shunt fault. The calculations are done with a method of successive simplification.
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Dynamic model and deexcitation of brushless synchronous generator
Chrobák, Petr ; Huzlík, Rostislav (referee) ; Ondrůšek, Čestmír (advisor)
This master thesis is focused on the synchronous generator mathematical model analysis. Based on the analysis are compiled mathematical models of main generator and exciter cooperating in brushless synchronous generator excitation system. Mathematical models of both machines are based on system of differential equations and their validity is verified in Matlab-Simulink. The master thesis is devided into three main parts. First part is focused on the derivation of differential equations to describe the behavior of electrical quantities of machines. In the second part are compiled and simulated mathematical models of both synchronous machines in Matlab-Simulink. The correctness of models are verified by approximate analytical calculations of selected steady and dynamic states. The last part is focused on design and simulation of concept for main generator rapid field winding deexcitation in brushless synchronous genereator excitation system.
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The calculation of the short circuits of the given network
Bordovský, Lukáš ; Paar, Martin (referee) ; Toman, Petr (advisor)
The main aim of this Bachelor thesis is to introduce you a calculation of short-circuit rates in compliance with IEC 60909, and a subsequent calculation of a scheduled real network. The thesis itself is divided into two parts : a theory about the short-circuit problems and a simple model example are stated in the first part, in the second part is stated the calculation of the given real network for the case of an occurence of shunt faults at distribution points, namely a three-phase fault, a two-phase isolated fault, a double-phase-to-earth fault and a single phase fault. The work is coupled with a determination of current and voltage rates at points P and K. At the point P is situated distance protection relay and at the point K comes the shunt fault. The calculations are done with a method of successive simplification.
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Dynamic model and deexcitation of brushless synchronous generator
Chrobák, Petr ; Huzlík, Rostislav (referee) ; Ondrůšek, Čestmír (advisor)
This master thesis is focused on the synchronous generator mathematical model analysis. Based on the analysis are compiled mathematical models of main generator and exciter cooperating in brushless synchronous generator excitation system. Mathematical models of both machines are based on system of differential equations and their validity is verified in Matlab-Simulink. The master thesis is devided into three main parts. First part is focused on the derivation of differential equations to describe the behavior of electrical quantities of machines. In the second part are compiled and simulated mathematical models of both synchronous machines in Matlab-Simulink. The correctness of models are verified by approximate analytical calculations of selected steady and dynamic states. The last part is focused on design and simulation of concept for main generator rapid field winding deexcitation in brushless synchronous genereator excitation system.
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