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Development of monitoring device for voltage instrument transformes
Marčok, Samuel ; Odehnal, Martin (oponent) ; Bušov, Bohuslav (vedoucí práce)
The topic of this bachelor thesis is instrument transformers and development of monitoring device for service purposes. The first chapter of this work is dedicated to a theoretical functionality of instrument transformers. It also deals with the instrument transformer as a separate unit according to norm EN 61869-1. Next chapter depicts instrumental transformer as a part of switchgear UniGear ZS1 (a product of ABB) and its standard working conditions. The results of these two separate chapters are two views of the instrument transformer, the first as a separate device and the second as part of the unit (switchgear), which in each case must be adapted to different conditions. A separate chapter describes the effects of temperature, humidity, pressure, altitude, vibration and discharges on the instrument transformer. The work further explains the physical nature of selected quantities and describes the methods of their monitoring. The conclusion of the work is a summary of the acquired knowledge and a brief overview of the results of the work.
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Bánki-Michell turbine set and its maximum power point control
Marčok, Samuel ; Baculák,, Tibor (oponent) ; Červinka, Dalibor (vedoucí práce)
This master’s thesis focuses on maximalization of power point of Bánki-Michell turbine and asynchronous generator set in small hydroelectric powerplant with the use of frequency converter. The first chapter addresses the history, division, and construction of hydroelectric powerplants. The following two chapters describe mechanical and electrotechnical equipment that is necessary for correct design of the control. The fourth chapter describes control possibilities of asynchronous generator and Bánki-Michell turbine set. As a verification of correctness, master´s thesis involves simulation in Matlab-Simulink. Results of this simulation are addressed in the fifth chapter, where systemic behaviour in selected control approach with the maximum power point of the set is considered. The most extensive chapter is the sixth one, because it depicts detailed description of measurement in speed or torque control. Last chapter summarizes and compares measured dependences with expected systemic behaviour derived from simulation. The conclusion of this thesis raises another possibilities for improvement of water potencial usage and describes the contribution of frequency converter.
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Bánki-Michell turbine set and its maximum power point control
Marčok, Samuel ; Baculák,, Tibor (oponent) ; Červinka, Dalibor (vedoucí práce)
This master’s thesis focuses on maximalization of power point of Bánki-Michell turbine and asynchronous generator set in small hydroelectric powerplant with the use of frequency converter. The first chapter addresses the history, division, and construction of hydroelectric powerplants. The following two chapters describe mechanical and electrotechnical equipment that is necessary for correct design of the control. The fourth chapter describes control possibilities of asynchronous generator and Bánki-Michell turbine set. As a verification of correctness, master´s thesis involves simulation in Matlab-Simulink. Results of this simulation are addressed in the fifth chapter, where systemic behaviour in selected control approach with the maximum power point of the set is considered. The most extensive chapter is the sixth one, because it depicts detailed description of measurement in speed or torque control. Last chapter summarizes and compares measured dependences with expected systemic behaviour derived from simulation. The conclusion of this thesis raises another possibilities for improvement of water potencial usage and describes the contribution of frequency converter.
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Development of monitoring device for voltage instrument transformes
Marčok, Samuel ; Odehnal, Martin (oponent) ; Bušov, Bohuslav (vedoucí práce)
The topic of this bachelor thesis is instrument transformers and development of monitoring device for service purposes. The first chapter of this work is dedicated to a theoretical functionality of instrument transformers. It also deals with the instrument transformer as a separate unit according to norm EN 61869-1. Next chapter depicts instrumental transformer as a part of switchgear UniGear ZS1 (a product of ABB) and its standard working conditions. The results of these two separate chapters are two views of the instrument transformer, the first as a separate device and the second as part of the unit (switchgear), which in each case must be adapted to different conditions. A separate chapter describes the effects of temperature, humidity, pressure, altitude, vibration and discharges on the instrument transformer. The work further explains the physical nature of selected quantities and describes the methods of their monitoring. The conclusion of the work is a summary of the acquired knowledge and a brief overview of the results of the work.
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