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Simulation model of MV network for automatic compliance simulation
Michalica, Tomáš ; Drápela, Jiří (referee) ; Dvořáček, Jiří (advisor)
This bachelor thesis deals with the creation of a numerical simulator of the HV system and the subsequent testing of the requirements for the production modules using PSCAD. The theoretical part of the thesis will first describe the HV network and its elements, then all the requirements that the production modules must meet in order to connect to the network will be discussed in detail. The end of the theoretical part will focus on the describtion of the tests that will be used to test the requirements. The practical part consists of the design and creation of the actual model of the high voltage system in PSCAD. The conclusion of the bachelor thesis will be the evaluation of the measurement results and the comparison of the measured values with the expected values.
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Integrated Measurement System for In-Field Compliance Testing
Chvalová, Aneta ; Morávek, Jan (referee) ; Dvořáček, Jiří (advisor)
As the number of renewable energy sources has increased, new installations have been subject to new requirements for their control, whether autonomous (responding to conditions at the point of connection) or dispatchable. An important step for the commissioning of photovoltaic (PV) plants is to perform compliance testing, which is sometimes only appropriate or necessary to perform in the field on a complete installed plant. The measurements are used to obtain a set of data which is then used to issue a certificate of correct operation (i.e. compliance with requirements). The main output is a measurement system assembled into a portable case that can be easily transported to the PV installation site and simply connect the measurement analyzer to both the AC at low voltage level (for recording voltage, current, power, frequency) and DC (for recording binary commands and signaling). Also included is elaborate documentation of the case itself.
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Closing mechanism paper bag
Klíma, Pavel ; Anderle, Martin (referee) ; Dvořáček, Jiří (advisor)
This thesis deals with a design of new dot-wheels gearing. These wheels serve for closing of paper covers of tea bags. First of all the suggested spare options of the gearing shape are compared with the original. On the basis of the comparison results the gearing is solved as a substandard kind of involute gearing. The involute gearing is designed by the method of generalized parameters. For the gearing design the program GEARING – symetrical profile version 1.5. was used. Consequently this program was adapted for the case of the change of the instrument shape by the user. The kind of wheels material was designed. Further the way of wheels production for single-piece and batch production was also designed. At the end the economic evaluation of the wheels production with newly designed profile was done.
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Draft block for dough processing
Novotný, Jan ; Vlašic, František (referee) ; Dvořáček, Jiří (advisor)
The Bachelor´s thesis deals with a structural design of a draft block of the placement of dough processing rollers, which are used for stiffening wheat dough in bakery lines intended for the production of common bakery products. The introduction gives a description of a bread and common bakery making production line. Next the thesis briefly deals with other possible dough-stiffening methods and with sanitary, structural and material requirements for food processing machinery. The structural part is devoted to a roller propulsion draft and a solution of a shift of one of the rollers. It contains a calculation of a worm gear, a load shaft calculation and a complete design documentary materials.
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Design of fuel flow meter
Krejčí, Martin ; Svoboda, Pavel (referee) ; Dvořáček, Jiří (advisor)
This thesis deals with the structural design of flow meter for fuel at petrol stations. Begin of work deals with the theory of flow measurement. The brief overview of different types of flow meters is shown here. Coriolis flow meter is described in more detail. Another part includes the design options of the flow meter. One of them is selected for further processing.
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Solution of Electronic Shifting for COMEX Gearbox
Crhová, Hana ; Strecker, Zbyněk (referee) ; Dvořáček, Jiří (advisor)
The subject of this barchelor's thesis is design of shifting of vehicle for handicapped people, with the emphasis on simply shifting of transmission gears. In the first part there is a comparison of Elbee with other vehicles of this category. Next part is about gearboxes divided by type of shifting. And there is comparison of these gearboxes. In the last part there is the choice of the best gearbox and construction of additional mechanism which provides correct functionality of transmission system.
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