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Title: Development of a Spectral Theory for Analysis of Non-Stationary Pulse Stochastic Electromagnetic Processes in Devices of Electric Transport Systems
Authors: Szeląg, Adam
Kostin, Mykola
Nikitenko, Anatolii
Mishchenko, Tetiana
Jefimowski, Włodzimierz
Keywords: spectrum
electric transport
correlation function
Issue Date: 2019
Publisher: National Technical University of Ukraine "Igor Sikorsky Kiev Polytechnic Institute", Kiev
Citation: Development of a Spectral Theory for Analysis of Non-Stationary Pulse Stochastic Electromagnetic Processes in Devices of Electric Transport Systems / Adam Szeląg, Mykola Kostin, Anatolii Nikitenko, Tetiana Mishchenko, Włodzimierz Jefimowski // 2019 IEEE 6th International Conference on Energy Smart Systems : conference proceedings, April 17–19, 2019, Kyiv, Ukraine / Igor Sikorsky Kyiv Polytechnic Institute. – Kyiv, 2019. – Р. 58–63.
Abstract: EN: A spectral analysis of traction voltages and currents is a basis for estimation of electromagnetic compatibility level and quality of consumed power in electric transport systems. However, such an analysis is usually performed for steady-state modes and only under the condition that the time realization of voltages and currents, being deterministic for continuous quantities, have infinite length. De facto, the electric transport devices operate in non-stationary dynamic modes (starting up, coasting, acceleration, iregenerative braking, stopping, wheel spin, voltage surges, etc.). As a result, the voltage across the traction motors and the current flowing through them are noncontinuous pulsed stochastic processes. It is necessary to add that in emergency modes the voltage and current are short-term single pulses.The paper presents the spectral analysis of such random sequences of pulses as well as their fronts and decays, the concepts of actual and instantaneousspectra. The analytical expressions for amplitudes and the initial phases of k-th harmonics are obtained using the discrete Fourier transformation. The numerical calculations of the spectral composition of stochastic pulse processes of voltage and current were performed for the DE1 and VL8 electric locomotives (Ukraine) as well as for trams operating on the i routes of the city of Dnipro. The actual and instantaneous spectra, as well as the spectra of the full correlation functions and their “tails”, were determined for the electric traction voltages and currents.
Description: М. Kostin: ORCID 0000-0002-0856-6397; А. Nikitenko: ORCID 0000-0002-6426-5097; Т. Mishchenko: ORCID 0000-0001-6336-7350
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