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This paper presents capabilities of the remote EVC management examined during custom software development. This task was done using xml based protocols on CIRCUTOR's based devices mounted in Linte⁁2. The finall result allows to integrate the whole system with SCADA and BMS.
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In this article hyperthermia therapy of tumors by electromagnetic field in radio-frequency range is described. Electromagnetic fields are used to generate temperature distribution inside the tumor and in surrounding tissues. First equations allowing calculation of the magnetic field within human body in terms of magnetic vector potential A and under sinusoidal steady state are derived. Next Pennes...
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This paper presents an influence of magnetic core on measurements of frequency characteristics for 2 reference coils. Authors presents 2 measurement setups: in frequency and time domain. Performed measurements allow to conclude visible effect of the magnetic core to the frequency up to 300 kHz, which must be taken into account when modeling the transformers for the diagnosis of FRA.
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The paper presents a new concept of constructing an electric machine based on repetitive electromechanical modules. A dedicated method for magnetic field analysis with the use of a three-dimensional Ansys Maxwell software package is employed.
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Silicone gels are gaining popularity as insulating materials in electrical applications, owing among others, to their good thermal stability, high elasticity, easy processing and good dielectric properties. In this paper results of dielectric strength measurements performed for a commercially available insulating RTV-2 silicone gel are discussed. Test cells with IEC-60243 compliant parallel plate...
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This paper presents a new method for modeling and identification of a simple electric circuit described by fractional-order differential equation. The Grunwald-Letnikov fractional-order derivative is approximated by its effective discrete-time model based on Laguerre filters, giving rise to a new discrete-time integer-order equation modeling the considered electric circuit. High accuracy of modeling...
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The article shows the concept of the control system with output currents trajectory correction to circular form in case of the voltage source inverter. The discussed solution presents the concept of control system using the principle of double-modulation to adjust the trajectory of the currents in the cases of load asymmetry. The controller with double-modulation, proposed in the paper, has been verified...
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The paper contains selected results of research related to a neural model of development of the electric power system from the unmanned factories perspective in the MATLAB environment. For the purpose of an experiment that involved designing and testing the neural model of the system, numerical data for the years 1946 to 2009 are used, which comprise nine input and five output variables. In order...
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In this paper the commutation mechanism based on LV mechanical circuit breaker and parallel semiconductor device is discussed. This hybrid switch comprises electromechanical relay connected in parallel with semiconductor branch controlled by microprocessor unit. The work presented herein covers both laboratory experiments as well as EMTP-ATP simulations, where modeling of electric arc behavior was...
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Due to the high variability of energy consumption over time and the impossibility of its long-term storage, an important issue is the selection of appropriate precise tools for forecasting. The article describes the dynamic modelling and the results of predictive dynamic models developed for a group of individual customers. The results were evaluated on the basis of real data about consumption of...
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In this paper a single phase grid-connected photovoltaic converter with maximum power point tracking algorithm is presented. This system is characterized by high efficiency and good output quality parameters of electrical energy. The implemented inverter operates in current tracking controller mode. The output current (current of grid) is almost sinusoidal and the reactive power is equal to zero....
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In this article authors briefly describe the concept and an exemplary implementation of a scalable vision understanding system. In the practical implementation a popular humanoid robot NAO is being used. The robot's video processing algorithm is capable of connecting to a remote computational resource (server or cluster) for running more sophisticated image understanding algorithms. The novelty of...
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The value of measurand reconstruction based on the result of observation of the output of the measurement path belongs to the so-called ill-conditioned operation. It is so even for the well-known dynamic of the track type linear differential equation. This task is sensitive to any distortion and measuring errors by which generally requires the use of complex mathematical operations. If the measuring...
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Frequency converters are commonly used in drives with controlled rotational speed of three-phase induction motors. The power inverter built in the system is a component with varying impedance, is switched into the circuit between the supply source and the load. The load is subject to the assessment of reliability of shock protection. The internal setup of the power inverter causes that the shorting...
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The article deals with the subject of the failure of overhead power lines in south-eastern Poland. Based on data collected over the years, a technical and statistical analysis was done on the power outages that occurred in the selected area. The main purpose of this analysis was to gather information and show primarily the causes of failures, recognize tendencies, demonstrate trends over the years...
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The paper presents selected results of research on modeling and modeling identification nerone's development of the electricity market. For example on the electricity market shows the results of neural and identification modeling. As a result of comparative studies showing that yields better results neural modelling than identification modelling for this type of systems containing a large number of...
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The subject discussed in the paper is the special purpose power electronics converter that fundamental task is generating an output current being precisely mapped in a reference input signal. The estimated generator output power is equal to 1 kW. The main expected application area of this one is a high power ATE (Automated Test Equipment). The paper presents the conception of the generator and selected...
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Diagnostics of a circuit breaker is usually performed using a digital processing of voltage and current signals, that gives the assessment of the mechanical work delivered by the drives. Results of such systematic and long-term measurements, gathered for large enough population and analyzed using statistic methods make possible rational management of circuit breaker (CB) assets. This Paper shows experimental...
