National Repository of Grey Literature 21 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Analysis of the electrical power measurement system in the local distribution network Pod Palackého vrchem
Hájková, Barbora ; Orságová, Jaroslava (referee) ; Jurák, Viktor (advisor)
The diploma thesis introduces a detailed analysis of the local distribution system (LDS) Pod Palackého vrchem (PPV) in the Brno, parameters of power transformers and cable routes between them. The elements of the electrical network that are influencing the balance of reactive power are described along with its sources and appliances. In the next part is defined the present concept of long-term measurement in the LDS by using current and voltage sensors. This part deals with calculations of power losses in the power transformers and the cable lines together with uncertainties concerning power measurement in the field of energetics. The essential part of the thesis focuses on the analysis of the temporary measurement implementation in the LDS, data processing along with the comparison of measured values from temporary measurement with values from permanent measurement. In conclusion, the error of the system is determined.
Reactive power changes at the TSO-DSO interconnection point by RES power factor regulation
Pololáník, Pavel ; Fiala, Zbyněk (referee) ; Ptáček, Michal (advisor)
This bachelor thesis deals with the long-term development of active, and primarily reactive energy flow at 110/22 kV distribution transformation points in the E. ON distribution network. It compares two different areas (city vs. countryside), differing in type of used distribution network and in composition of decentralized energy resources. Another point of this thesis is to describe current controlling possibilities for decentralized resources installed to the voltage level of 22 kV considering reactive power compensation. Thesis introduces proposed methods and conditions used in remote mass controlling of power factor of decentralized resources. There is mentioned an evaluation of an already performed test whose purpose was to verify possibility of influencing reactive power at the interconnection point between distribution and transmission system. The factors causing the overflow reactive power were analysed. In this thesis were analysed factors, which causing overflow reactive power from distribution to the transmission system. This analysis will be the basis for future use of mass reactive power regulation.
Compensation of reactive power to avoid its overflow into the MV system
Jurák, Viktor ; Ptáček, Michal (referee) ; Orságová, Jaroslava (advisor)
This master thesis is focused on analysis of reactive power flow in LV and MV networks. In the first part there is a definition of reactive power and description of individual parts of electrical networks that contribute with their reactive power to distribution network. The second part is dedicated to calculation of power flow in simulation software PSS® Sincal where on numerical models of network different types of network configuration are tested and consequently its influence on reactive power flow is evaluated. A more detailed analysis is dedicated to reactive power compensation in networks with distributed generation equipped with Volt-Var regulation and its possible negative mutual influence. This thesis also includes general recommendation on the basis of network simulation analysis concerning installation of compensating systems in distribution transformer station.
Automatic Voltage Control of Distributed Generation in the E.ON Medium Voltage Grid
Skoupý, Martin ; Vaculík, Petr (referee) ; Toman, Petr (advisor)
Content of this master`s thesis is theoretical introduction of the power factor, reactive power and voltage control of decentralised sources of the high voltage in the E.ON distribution network. Furthermore, the thesis deals with possibilities of regulating the power factor and reactive power, carried on above-mentioned resources, in other to stabilize the voltage and overflow control of the reactive power to higher voltage level. The practical part describes how the automatic power factor and voltage control had been put into action by central management control within the headquaters dispatching systém of the company. Following chapter acquaints a reader with information of how the automatic power factor and voltage control had been tested and how it is utilized in practice. In the conclusion the work summarizes results and effects of the power factor regulation and voltage control to stabilize the voltage and the overflow of the reactive power in the E.ON network.
Load Flow Calculation of Chosen Part of E.ON 110kV Grid with Analysis of Reactive Power Flow
Skoupý, Martin ; Vaculík, Petr (referee) ; Toman, Petr (advisor)
Content of this bachelor thesis is theoretic introduction to the steady state of network and optimization of network operation from the viewpoint of reducing active power losses in the electric wiring. Furthermore, the work deals with analysis of the network traffic flow distribution of the active and reactive power and consequences of overflow of the reactive power from the medium voltage level to the high voltage level. The following part includes designing practical involvement of the area and carrying out calculations of its operation in terms of losses. Another chapter is proposition of measures to minimize the overflowing of reactive power in distribution system and its impact on reduction of operating losses in the network. In the conclusion the work summarizes results obtained and the final assessment of influence of reactive power for operation of the network.
Reactive Power Compensation of The Industrial Consumer
Hanzelka, Jiří ; Holoubek, Jiří (referee) ; Toman, Petr (advisor)
This thesis is focused on reactive power compensation and it suggests new conceptions for industrial customers. The first part describes the basics of compensation, location and ways of compensation. In conclusion of this part it is a good example of parallel reactive power compensation. The second part deals with the design of reactive power compensation specifically for raw water pumping station. Compensation was solved both on a low voltage level and on the high voltage level. For drawings were used program EPLAN Electric P8.
Reconfiguration of an industrial distribution system including local power source integration
Benetka, Tomáš ; Holoubek, Jiří (referee) ; Drápela, Jiří (advisor)
This bachelor´s thesis deals with reconfiguration of industrial network that has been technologically reconstructed. The aim of this study is mostly to describe changes made on devices used for reactive power compensation and improving the power quality. Thesis is divided into two parts. Theoretical part of thesis deals with parameters used for judging power quality and causes of changes for these parameters, eventually with devices for its adjustment. Standard demands for these parameters are also included. Further, reactive power compensation, extract of reactive power appliance and their influence on power network is described in this thesis. In the second - practical - part devices used for reactive power compensation were reconstructed. This part is also focused on local energy source integration and usage of power electronic engineering products for power quality provision.
3-phase Power Factoctor Corrector Units for Laboratory Training
Plucnara, Roman ; Paar, Martin (referee) ; Drápela, Jiří (advisor)
The aim is to describe the issue of compensation factor. The thesis describes the methods and individual implementation of compensation unit from rotating compensators, used until now protected compensation section and active filters. It also describes the influence of processing and elimination of higher harmonics present in the compensated circuits. The following are simple phasor diagrams and relevant patterns. The practical part shows these preconditions used to create laboratory exercises. Individual solve specific practical task illustrate the importance of reactive power compensation is using sophisticated, compensation elements used, for example, reactive power regulators. It reflected the simplest possible compensation the power factor, using the manual switching of capacitor banks.
The reactive power compensation of the industrial consumer
Doseděl, Tomáš ; Martinák, Rostislav (referee) ; Toman, Petr (advisor)
This thesis is about reactive-power compensation used in real practise. In theoretical part, basic principles of reactive-power compensation are stated. Also, charges for breaching power factor and overview of individual compensation components are dealth with. Practical part is about the design of a low voltage compensator for industrial customer.Compensator uses central compensation with gradual switching.
The reactive power compensation of the industrial consumer
Pospíšil, Zdeněk ; Holoubek, Jiří (referee) ; Toman, Petr (advisor)
This bachelor thesis deals with the reactive power compensation. The reactive power compensation falls into an important measures reducing current load of electrical grids and other equipments, which increase its lifespan and decrease energy losses. The bachelor thesis is divided into a theoretical and a practical part. In the theoretical part is explained the theory necessary for good understanding of compensation, explained the sanctions and the additional fees for unsatisfactory power factor and summarized the impacts of compensation on the electrical network. Further is shown the basic classification of compensation by its place of connection, type of compensation device and regulation. The end of theoretical part is dedicated to the simple calculation of compensation. The practical part deals with the real design of the reactive power compensation for a particular industrial consumer.

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