Browsing by Author "Kirilyuk, Tatiana I."
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Item Improving the Control Method of Energy Losses in Contact Line(Instytut Kolejnictwa, Warszawa, 2015) Kirilyuk, Tatiana I.EN: Purpose. Today energy losses in contact line are determined by calculation, but this method gives approximate values. It is proved that it is more effective control of the energy losses in contact line using indirect methods, but existing methods give the error of 7,5%. It is necessary to improve the control method of energy losses in contact line by taking into account additional factors. Methods. The method of integral and matrix calculus used to develop a mathematical model for determining energy losses coefficient. Theory of experiment planning used for development a regression. The Results. Regression equations of the second order for determining energy losses coefficient for areas of direct and alternating currents were received on the basis of full factorial experiment. Character of energy losses coefficient was defined, the limits of its changes were set and recommendations of its regulations were provided on the basis of the Monte Carlo method. An experimental confirmation of the results was done. It showed that the proposed improved method reduces error in the determination of energy losses. Scientific novelty. For the fi rst time, an analytical expression for estimating energy losses coefficient, which takes into account the number of trains on the zone between traction substations was found. This allows determining energy losses in contact line more accurately. First established the law of the statistical distribution of the energy losses coefficient, which makes it possible to evaluate its limits and advice on regulations change it. Practical significance. The method of determination of the loss factor, which takes into account additional factors was found. This makes it possible to reduce the taking into account error of loss of 2,1% as compared with the existing indirect method.Item Modeling the Coefficient of Energy Losses in a Contact Line Based on the Monte-Carlo Method(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2014) Kirilyuk, Tatiana I.EN: Distribution laws and the basic characteristics of the factors influencing the coefficient of energy losses were identified during the study. These factors are the wear (reduction of the area) of contact line, the number of trains on railway section, the environment temperature, speed and current of trains. The law of statistical distribution of the loss coefficient was established for the first time. This makes it possible to evaluate its borders and make recommendations on regulations change it. The average value the loss coefficient is determined by which it will be possible to adjust meter.Item The Scheme Realization for the Indirect Metering of Energy Losses in a Contact Line(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Kirilyuk, Tatiana I.; Bosiy, Dmytro O.EN: The volume of energy losses in electric grids is showed problems which need emergency solutions in development, reconstruction and technical modernization of power networks, improved methods and tools for their operation and management in improving the accuracy of electricity metering, fundraising efficiency for electricity consumed etc. The relative energy losses in electric networks can be considered satisfactory, if they do not exceed 4-5 %. Energy losses of 10 % can be considered the maximum acceptable in terms of process of transmission of electric power by networks. Determination of energy losses in the contact line of electrified railways has a number of features that are primarily caused by variable size and location of the load which does not take into account a number of factors that affect the magnitude of losses. The indirect method of energy losses metering is based on the register values of per square ampere-hours on the feeders of traction substations. The meter of energy losses shows value of energy losses depending on the measured in the unit of time next factors. They are square ampere-hours, calculated energy losses coefficient, measurement period of energy losses and the square of the actual conversion coefficient. The matching device for analog microcircuits AD637 and AD633 was used as the realization of the circuit of the device as part of the measuring complex with the analyzer power Satec EDL-175. These analog microcircuits are done determination of the RMS value and multiplication of signals with the agreement of the input and output signals by the precision operational amplifiers OP-07. Using the developed device allowed to determine energy losses in the contact line in the real distance with an error not exceeding 5.4%.