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In this paper is to be presented the current situation of the modern techniques of reducing NOx formation in the primary processes using the methods of burning fuels found in electric heating plants. Various cycles will be analysed, highlighting the existing advantages and disadvantages and having in view the production of NOx. In the second phase of the project, intends to obtain parameters for power...
The report provides comparative data for the determination of the world rankings technical (electrical) universities and national ratings of Russia and Germany for technical (electrical) function. The weight coefficients accepted for calculation of indicators, a ratio between them, the structure of technical (electrotechnical) higher educational institutions of the Russian Federation and Germany and...
Considered and highlighted the strengths and weaknesses of different approaches for laboratory research in the field of electrical engineering, building on the existing Federal education standards. Shows how the laboratory practical work using combined studying is realized, on the example of multimedia laboratory of the German firm Lucas Nulle on specific activities in electrical engineering. Focused...
Voltage and current measuring transformers must be accurate even in a case when measuring value is not strictly harmonic, but it contains some higher harmonics. For this reason, both measuring transformers must exhibit high linearity. This means that measuring transformers should not contain any ferromagnetic material, which is always nonlinear. Therefore, any measuring transformer must be air-cored...
In the last years, induction heating systems have gained a big growing in the home appliances market. The following work proposes to design an induction cooking heating system. The power transfer process will be optimized by limiting or even eliminating switching losses using techniques such as zero current/voltage switching and by designing a parallel LC resonant circuit, which operates near at the...
Romanian Balancing Market is enforced since July 2005 when Romanian Operator Transmission and System (CN TRANSELECTRICA SA) begun the activity as Balancing Market Operator. Since then, the Romanian Balancing Market was based on the Wholesale Electricity Commercial Code which was published in 2004. After some years of activity and operation of Balancing Market, the Romanian Regulatory Authority proposed...
In the last few years the investments in PV plants have managed a fast growth of the installed power, especially on grid systems. Most of PV plants are located close to cities or villages, producing for local consumers. The interest in reducing the environmental impact caused by tailpipe emissions in big towns represents a worldwide problem. Electricity production, using solar energy, can achieve...
A Data Center can consist of a large group of networked servers and associated power distribution, networking, and cooling equipment. All these applications consume enormous amounts of energy which result in a significant increase in energy inefficiency problems. One of the causes of Data Center energy inefficiency power distribution is from the uninterruptible power supply (UPS). The UPS system is...
In order to show that a given set of EM sources comply with national rules on exposition, a prediction model for EM propagation is needed. For indoor environment, the test presented her show that reflections and multipath can significantly affect the field level respect to the free-space situation, which sometimes can doubles.
Photovoltaic systems have grown rapidly in the last few decades. This growth has enhanced research about this technology, focusing on reducing cost and improving efficiency. Maximum power point tracking (MPPT), which increases the overall efficiency of a PV system, is a main part of a PV system. In this paper, some MPPT methods have been critically reviewed. Fractional open-circuit voltage has been...
Power distribution networks (PDNs) consist in power and ground planes, voltage regulator modules and decoupling capacitors, [4]. Power and ground planes, knows as two parallel planes are widely used in printed circuit boards. In PDN design, already exists dedicated software that help the PI engineer to design a PDN according to the necessities. Using PSPICE, the planes of arbitrary shape can be modeled...
This paper studies the reliability of an industrial knitting machine, emphasizing the reliability value and the reliability indicators: failure rate and MTBF (Mean Time Between Failures). This study has been conducted on an industrial knitting machine and has duration of 4500 hours (approximately 6 months), after which preventive maintenance operations are planned. This study analyses the behavior...
In this paper the carbon emissions in smart grids are optimised. This is achieved by performing dynamical modelling with uncertainty analysis of smart grids using an Ensemble Based Closed-Loop Optimisation Scheme (EnOpt). Uncertainties include the fluctuations of consumer energy demand (behavioural) and generation fuel mix (green and non-green) are estimated using the Monte Carlo method. The UK electricity...
There are basically two kinds of losses in electrical distribution systems: the technical and non-technical losses. Technical losses are represented by ohmic losses (i.e., by Joule effect) and they are not registered by the energy meters. They are estimated during the design and construction phase of power distribution networks and regarded as operating costs by the power utilities. Sometimes, however,...
The new topology for a dc to ac converter based on the switched capacitor circuit was introduced recently. The promising features of low harmonic content, high efficiency, MPPT facility and voltage step up characteristics makes it a good candidate for grid connected-renewable energy sources. The harmonic content is further minimised in this paper by introducing multiple current modulators, each connected...
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