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The Effectiveness of the Investments for the Systems of El. Power Transmitions
Beneš, Jan ; Kolář, Vladimír (referee) ; Luňáček, Jiří (advisor)
In this master´s thesis I deal most with methods of economical effectivity of investments in electricity distribution and transmition from suppliers to final customers and also with methodology of economical investment effectivity in company E.ON. This proposal of evaluation methodology determines net present value, internal rate of return, and return period of a particular investment project. These surveyed values are determined from yearly net Cash Flow (CF) or from cumulated net CF. I have chosen program Microsoft Office Excel 2003 for its relatively easy input of parameters, simple assemble of calculation algorithm and also for convenient way of calculation results presentation.
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Monitoring in Middle- and Low-Voltage distribution systems penetrated by distributed generation
Kolacia, Tomáš ; Kolář, Vladimír (referee) ; Drápela, Jiří (advisor)
This thesis concerns monitoring in Middle- and Low-Voltage distribution systems penetrated by distributed generation. Monitoring itself means measuring voltages and power flows and sending relevant data to the supervisory system. The first part of the thesis describes distribution systems with differences between individual voltage levels. The following chapter is focused on consequences of high share of renewable energy sources in distribution systems. Most of the problems are partially resolved by technical conditions for connection of the new power sources. However, difficulties with voltage regulation and uncontrolled power flows to higher voltage levels remain. These are the reasons for measuring voltages and currents in medium voltage networks. Second to last subhead of this chapter is dedicated to possible benefits of monitoring. The fourth part of the thesis deals with voltage and current sensors with their advantages and disadvantages. The best suitable devices are chosen in the end of the chapter. It is crucial to mention that sensors are only part of measuring system. Analog outputs from current or voltage transformers need to be converted to digital signal and further processed. After that required quantities are finally sent. Properties of these circuit cards are described in the sixth chapter. Following part aims to define a certain key that will determine the suitable locations for installation of the measurement. The final part of the thesis compares measured voltages and power flows from real 22 kV network with calculated values from computer program PAS DAISY Bizon.
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The Effectiveness of the Investments for the Systems of El. Power Transmitions
Beneš, Jan ; Kolář, Vladimír (referee) ; Luňáček, Jiří (advisor)
In this master´s thesis I deal most with methods of economical effectivity of investments in electricity distribution and transmition from suppliers to final customers and also with methodology of economical investment effectivity in company E.ON. This proposal of evaluation methodology determines net present value, internal rate of return, and return period of a particular investment project. These surveyed values are determined from yearly net Cash Flow (CF) or from cumulated net CF. I have chosen program Microsoft Office Excel 2003 for its relatively easy input of parameters, simple assemble of calculation algorithm and also for convenient way of calculation results presentation.
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Monitoring in Middle- and Low-Voltage distribution systems penetrated by distributed generation
Kolacia, Tomáš ; Kolář, Vladimír (referee) ; Drápela, Jiří (advisor)
This thesis concerns monitoring in Middle- and Low-Voltage distribution systems penetrated by distributed generation. Monitoring itself means measuring voltages and power flows and sending relevant data to the supervisory system. The first part of the thesis describes distribution systems with differences between individual voltage levels. The following chapter is focused on consequences of high share of renewable energy sources in distribution systems. Most of the problems are partially resolved by technical conditions for connection of the new power sources. However, difficulties with voltage regulation and uncontrolled power flows to higher voltage levels remain. These are the reasons for measuring voltages and currents in medium voltage networks. Second to last subhead of this chapter is dedicated to possible benefits of monitoring. The fourth part of the thesis deals with voltage and current sensors with their advantages and disadvantages. The best suitable devices are chosen in the end of the chapter. It is crucial to mention that sensors are only part of measuring system. Analog outputs from current or voltage transformers need to be converted to digital signal and further processed. After that required quantities are finally sent. Properties of these circuit cards are described in the sixth chapter. Following part aims to define a certain key that will determine the suitable locations for installation of the measurement. The final part of the thesis compares measured voltages and power flows from real 22 kV network with calculated values from computer program PAS DAISY Bizon.
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