Wyniki wyszukiwania - Biblioteka Nauki

1

Faculty of electrical engineering and information technology in improving the quality of studies

100%

Janíček F. , Poljovka P.

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2006

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tom Vol. 315, z. 56

199-204

EN

From the perspective of long-term growth of STU FEI in Bratislava, the educational process quality management system is one of the key faculty management priorities. The system comprises processes that try to find answers to questions such as what are the actual results of the faculty educational processes, what is the actual level of improvement in student skills and competences or what are the characteristics of a good teacher or faculty. Answers to the questions may only be identified by consequently applying scientific principles in school management, by adapting ideally to changing political, social and economic environment and consequently improving the quality of education. The study attempts to provide partial answers to some of the applicable questions - tuition process assessment, implementation of quality management system at the faculty and accreditation of selected test labs.

2

Modeling of digital relay in ATP using foreign model

100%

Janíček F. , Mucha M.

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2006

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tom Vol. 315, z. 56

187-198

EN

This paper presents problems of digital relay model development in simulation program ATP-EMTP. Successfulness of fault detection is not quintessential. For this reason improvement of protection relays to trip correctly is essential. The improvement of digital relays, which are installed on full blast at nowadays, means development of better algorithms. To improvement of digital relays, interactive model in simulation program of power system e.g. ATP-EMTP, could properly contribute. This model is not at disposal and program of this model has to be created in ATP. There is internal programming language MODELS in ATP which enables creation of self programms, but for reason of its simplicity it is not sufficient for developing sophisticated models as in object oriented programming languages. In spite of it this deficit is compensated by allowing suitable interconnection between ATP computing core and external model developed in other programming language. For this reason for relay model development object oriented programming language C++ was chosen. This external model is necessary to link with source code of ATP-EMTP and that consecutively compile.

3

Utilization of biogas in combined generation of electrical energy and heat in Slovakia

100%

Janíček F. , Kubica J.

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2008

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tom Vol. 323, z. 60

125-127

4

Integrity management systems in power engineering

100%

Janíček F. , Poljovka P.

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2008

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tom Vol. 323, z. 60

123-124

5

Monitoring of electric power quality in administrative building

80%

Janíček F. , Eleschová Ž. , Beláň A.

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2006

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tom Vol. 315, z. 56

165-186

EN

In this paper we deal with a power quality monitoring in a low-voltage electrical circuits in administrative building and with its evolution in accordance with valid technical standard STN EN 50 160. Target of performed measurements was also to measure the current through neutral wire in the view of the triplen harmonic influence. We also realized measurements of potential sources of the higher harmonics in electrical network - transformer, compact fluorescent lamps, and modern appliances with switch-mode power supply concept.

6

Intensive cooperation between researchers and power industry: how to achieve desired target?

80%

Janíček F. , Polonec L. , Smitkova M.

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2006

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tom Vol. 315, z. 56

205-217

EN

Paper deals with present aspects and aims of energy research. It describes development and transformation of research in Slovak energy sector with comparison with old European Union member states. Finally, the paper's authors would like to define new challenges of future energy research in Slovakia through a creation of new body - Slovak technical unit for power engineering.

7

Project of a functional model of electricity market in the Slovak Republic

80%

Janíček F. , Michalík M. , Rapšík M.

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2008

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tom Vol. 323, z. 60

129-130

EN

The contribution deals with defining a model market and it shows activities among all the market participants, transmission system, operator, settlement of deviation and potential market operators. The solution of fundamental conditions is based on the analysis of market models in neighbouring countries (in the CEE region), but also in other countries in Europe. The contribution brings a description of the most important SEPS/CEPS profile. Furthermore, there are mentioned possible ways of effective analysis defining the model market with the description of relations among market participants, transmission system operators, settlement of differences between market operators. The development of production and distribution of electricity these days increasingly requires reinterpretation of current attitude of society to energy use, energy sources and energy distribution. It is obvious that there is a constant deficit of primary sources, which are an important part of energy economy in EU countries as well as in other countries all over the world. Constant growth of consumption, increasing prices and unstable situation in the areas of their extraction determine further development in energy policy. EU and OECD states, as well as other leading states of the world are fully aware of the problems ahead. Their energy policy is more and more focused on lower dependence on import of primary energy sources, on more efficient energy production, lower losses in transmission lines, but, above all, on motivating consumers to more rational use of energy. To prevent the shortage of electric energy is the primary goal of energy market liberalization; its main reasons are price reduction of energy sources for all groups of consumers including fluent and reliable supply. It is a paradox that this situation has changed in a short period of time. The main reason is that the prices of primary energy sources have broken all possible records. This particularly applies to electricity, where performance balance together with the predicted economic developments in EU countries as well as shut down of some efficient electricity production sites have set up conditions for the negative balance within the EU energy system. As specialist literature and scientific studies have shown, increasing electric energy prices and related problems will be solved in the EU by the extension of regulation mechanisms and permanently changing energy legislation. The primary goal in the EU is to decrease the dependence on the import of energy and energy sources. The EU authorities have set the primary objective of energy policy – reliable and fluent energy supplies to all customers. The most significant challenge is to be self-reliant in energy supply at national level as well as to limit import of primary energy sources from unstable regions. The Council of Europe asked the European Commission to propose further measures as: effective separation of production and supply activities from the operation of energy distribution system, further co-ordination of competences, a higher degree of independence of national energy regulation authorities, setting up an independent mechanism for co-operation between national regulation authorities, setting up a mechanism for distribution companies to improve the co-ordination of network operations and network safety, international trade and network operation, higher transparency of operations on energy market. Contemporary model of energy market in the Slovak Republic consists of producers, suppliers, distribution system operators and transmission system operators, consumers and deviation settlement, which is performed by the transmission system operator SEPS. Some European states have one more market participant – market operator, whose activities are different in different states. It takes on some distribution system operator’s competences and creates others that improve the quality of electricity market. Its competences include the areas covering the registration of market participants, registration and publicizing of offer and demand for supplies and consumption of electricity in various time horizons, assessment and settlement of deviations and organization of short term (daily and shorter) energy market. The liberalization of energy market is expected to use a new, nondiscriminatory electricity supply system. The state regulated system is gradually being abolished. Unlike the old system, the new competitive energy market environment offers the customer a completely new position. The customer can now completely control his market operations with electricity, but, on the other hand, he is fully responsible for all his decisions.

8

Potencjał odnawialnych źródeł energii i możliwość ich wykorzystania przy produkcji energii elektrycznej w Słowacji

61%

Janíček F. , Tomiš I. , Kovaľ P. , Daruľa I. , Šedivý J. , Šulc I.

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tom nr 2-3

96-101

PL

Przedstawiono opcje zamiany w długim horyzoncie czasowym aktualnych mieszanek energetycznych z nieodnawialnych, konwencjonalnych źródeł energii wyłącznie źródłami odnawialnymi w kontekście środowiska Słowacji oraz możliwego połączenia energii atomowej na przestrzeni najbliższych 50 lat. Najważniejsze potrzeby są nakreślone jako konsumpcja energii przez gospodarstwa domowe oraz przedsiębiorstwa na potrzeby transportowe i przemysłowe. Ma to na celu uniezależnienie Słowacji od zagranicznych dostaw energii.

EN

Presented are options for replacing, over a long time period, the current energy mix coming from non-renewable, conventional sources with energy coming solely from renewable sources (in the context of Slovakian environment) and its possible combination with nuclear energy in a 50-year time horizon. Energy consumption by households and companies to fulfil their transportation and industrial needs is determined to be the most vital. All these plans are made with the aim for Slovakia to become independent of foreign sources in energy supplies.