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Adam Szeląg
Faculty of Electrical Engineering, Institute of Electrical Power Engineering, Warsaw University of Technology, 00-661 Warszawa, Poland

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Journal article
Published: 18 December 2020 in Energies
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The regenerative braking of railway vehicles is widely used in DC railway systems all over the world. This mode of operation provides an opportunity to reuse part of the energy consumed by vehicles, and makes the railway system more energy efficient. During regenerative braking, not only energy management is an issue, but also Electromagnetic Compatibility EMC issues, such as interference of generated current harmonics with a railway signaling system. In this paper, the selective harmonic elimination modulation technique (SHE-PWM) was introduced to the traction drive with a three-level inverter to reduce specific catenary current harmonics generated during regenerative braking. The simulation model of a traction drive appropriate for harmonics analysis was proposed and verified by the measurements in the low-power laboratory drive system. The model was re-scaled to the 3 kV DC system for further study. The model of an induction motor with electromotive force and the method of its calculation was proposed. Furthermore, an analysis of the braking chopper operation was carried out. The asymmetric control of braking chopper was proposed to reduce the current harmonics below limits during chopper operation.

ACS Style

Marcin Steczek; Piotr Chudzik; Adam Szeląg. Application of a Non-carrier-Based Modulation for Current Harmonics Spectrum Control during Regenerative Braking of the Electric Vehicle. Energies 2020, 13, 6686 .

AMA Style

Marcin Steczek, Piotr Chudzik, Adam Szeląg. Application of a Non-carrier-Based Modulation for Current Harmonics Spectrum Control during Regenerative Braking of the Electric Vehicle. Energies. 2020; 13 (24):6686.

Chicago/Turabian Style

Marcin Steczek; Piotr Chudzik; Adam Szeląg. 2020. "Application of a Non-carrier-Based Modulation for Current Harmonics Spectrum Control during Regenerative Braking of the Electric Vehicle." Energies 13, no. 24: 6686.

Journal article
Published: 04 December 2020 in Energies
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In this paper, an application of the recently developed Grasshopper Optimization Algorithm (GOA) for calculation of switching angles for Selective Harmonic Elimination (SHE) PWM in low-frequency voltage source inverter is proposed. The algorithm is based on insect behavior in the food foraging swarm of grasshoppers. The characteristic feature of GOA is the movement of agents is based on the position of all agents in the swarm. This method represents a higher probability of convergence than Particle Swarm Optimization (PSO) Modifications of GOA have been examined regarding their effect on the algorithm’s convergence. The proposed modifications were based on the following techniques: Grey Wolf Optimizer (GWO), Natural Selection (NS), Adaptive Grasshopper Optimization Algorithm (AGOA), and Opposite Based Learning (OBL). The performance of GOA and its modifications were compared with well-known PSO. Areas, where GOA is superior to PSO in terms of probability of convergence, have been shown. The efficiency of the GOA algorithm applied for solving the SHE problem was confirmed by measurements in the laboratory.

ACS Style

Marcin Steczek; Włodzimierz Jefimowski; Adam Szeląg. Application of Grasshopper Optimization Algorithm for Selective Harmonics Elimination in Low-Frequency Voltage Source Inverter. Energies 2020, 13, 6426 .

AMA Style

Marcin Steczek, Włodzimierz Jefimowski, Adam Szeląg. Application of Grasshopper Optimization Algorithm for Selective Harmonics Elimination in Low-Frequency Voltage Source Inverter. Energies. 2020; 13 (23):6426.

Chicago/Turabian Style

Marcin Steczek; Włodzimierz Jefimowski; Adam Szeląg. 2020. "Application of Grasshopper Optimization Algorithm for Selective Harmonics Elimination in Low-Frequency Voltage Source Inverter." Energies 13, no. 23: 6426.

Journal article
Published: 17 April 2020 in Energies
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This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy storage devices (WESD) in light rail transportation (metro and tram) systems. The analysed benefits are the use of OESD and WESD as a source of supply in an emergency metro scenario to safely evacuate the passengers blocked in a metro train between stations; the use of OESD for catenary free sections, the benefits of using the WESD as an energy source for electrical car charging points and tram traction power supply; the benefits of using a central communication system between trams, cars, WESD and electrical car charging points. The authors investigated the use of: OESD with batteries for a catenary free section for different scenarios (full route or a catenary free section between two stations); the charge of OESD between stations (in parallel with tram motoring) to decrease the charging dwell time at stations and to help in achieving the operational timetable; the thermal effect of the additional load on the overhead contact system (OCS) when the tram is charging between stations; the sizing of OESD and WESD for emergency feeding in a metro system. The authors investigated the use of the WESD as a source of energy for the electrical car charging points to reduce the car pollution and carbon emissions. Presented in the paper is the enhanced multi train simulator with WESD prepared for the analyses conducted. The paper describes the DC electrical solver and WESD control method. A validation of the software has been conducted in regard to the substation voltage, WESD energy balance and WESD control.

ACS Style

Petru Valentin Radu; Miroslaw Lewandowski; Adam Szelag. On-Board and Wayside Energy Storage Devices Applications in Urban Transport Systems—Case Study Analysis for Power Applications. Energies 2020, 13, 2013 .

AMA Style

Petru Valentin Radu, Miroslaw Lewandowski, Adam Szelag. On-Board and Wayside Energy Storage Devices Applications in Urban Transport Systems—Case Study Analysis for Power Applications. Energies. 2020; 13 (8):2013.

Chicago/Turabian Style

Petru Valentin Radu; Miroslaw Lewandowski; Adam Szelag. 2020. "On-Board and Wayside Energy Storage Devices Applications in Urban Transport Systems—Case Study Analysis for Power Applications." Energies 13, no. 8: 2013.

Journal article
Published: 10 January 2020 in Energy
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This paper addresses the concept of vanadium redox flow batteries as stationary energy storage for achieving optimum parameters of energy and cost-effectiveness in transportation microgrids. Such energy storage has two main purposes: to utilize the energy recovered from braking trains, and shave power peaks. With abovementioned purposes, economic feasibility is the main driver of measures to optimize the battery parameters, including joint energy and power capacity, as well as and energy management strategy parameters. The optimization results obtained from the genetic algorithm and particle swarm optimization algorithm were compared, and the comparison demonstrates that the second method operates more sufficiently. The case study shows that the implementation of the proposed battery system in a traction substation allows one to achieve approximately 7 year payback period and decrease peak power and daily consumption by 581 kW and 1.77 MWh, respectively. In addition, sensitivity analysis was conducted to determine the impact of certain factors and battery parameters on the resulting payback period. The results show that the effect of deviation of energy management strategy parameters from optimum values on payback period is four times more profound than deviation of battery parameters, which demonstrates how important energy management strategy is.

ACS Style

Włodzimierz Jefimowski; Adam Szeląg; Marcin Steczek; Anatolii Nikitenko. Vanadium redox flow battery parameters optimization in a transportation microgrid: A case study. Energy 2020, 195, 116943 .

AMA Style

Włodzimierz Jefimowski, Adam Szeląg, Marcin Steczek, Anatolii Nikitenko. Vanadium redox flow battery parameters optimization in a transportation microgrid: A case study. Energy. 2020; 195 ():116943.

Chicago/Turabian Style

Włodzimierz Jefimowski; Adam Szeląg; Marcin Steczek; Anatolii Nikitenko. 2020. "Vanadium redox flow battery parameters optimization in a transportation microgrid: A case study." Energy 195, no. : 116943.

Journal article
Published: 15 October 2019 in IEEE Transactions on Industrial Electronics
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ACS Style

Marcin Steczek; Piotr Chudzik; Miroslaw Lewandowski; Adam Szelag. PSO-Based Optimization of DC-Link Current Harmonics in Traction VSI for an Electric Vehicle. IEEE Transactions on Industrial Electronics 2019, 67, 8197 -8208.

AMA Style

Marcin Steczek, Piotr Chudzik, Miroslaw Lewandowski, Adam Szelag. PSO-Based Optimization of DC-Link Current Harmonics in Traction VSI for an Electric Vehicle. IEEE Transactions on Industrial Electronics. 2019; 67 (10):8197-8208.

Chicago/Turabian Style

Marcin Steczek; Piotr Chudzik; Miroslaw Lewandowski; Adam Szelag. 2019. "PSO-Based Optimization of DC-Link Current Harmonics in Traction VSI for an Electric Vehicle." IEEE Transactions on Industrial Electronics 67, no. 10: 8197-8208.

Journal article
Published: 04 April 2019 in Energies
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This paper presents an analysis on using an on-board energy storage device (ESD) for enhancing braking energy re-use in electrified railway transportation. A simulation model was developed in the programming language C++ to help with the sizing of the ESD. The simulation model based on the mathematical description has been proposed for a train equipped with on-board ESD for analysis of effectiveness of its application. A case study was carried out for a metro line taking into consideration train characteristics, track alignment, line velocity limits and a running time table. This case study was used to assess the energy savings and perform a cost-benefit analysis for different sizes of the on-board ESD by applying the proposed approach. It was shown that when additional environmental benefits (reduction of CO2 emissions) are considered, this may significantly improve effectiveness of the investments due to CO2 European Emission allowances.

ACS Style

Petru Valentin Radu; Adam Szelag; Marcin Steczek. On-Board Energy Storage Devices with Supercapacitors for Metro Trains—Case Study Analysis of Application Effectiveness. Energies 2019, 12, 1291 .

AMA Style

Petru Valentin Radu, Adam Szelag, Marcin Steczek. On-Board Energy Storage Devices with Supercapacitors for Metro Trains—Case Study Analysis of Application Effectiveness. Energies. 2019; 12 (7):1291.

Chicago/Turabian Style

Petru Valentin Radu; Adam Szelag; Marcin Steczek. 2019. "On-Board Energy Storage Devices with Supercapacitors for Metro Trains—Case Study Analysis of Application Effectiveness." Energies 12, no. 7: 1291.

Journal article
Published: 01 August 2018 in Electric Power Systems Research
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This article presents a method supporting the decision-making process for implementation of a regenerative inverter in a 3 kV DC traction system. The method in question consists of two steps. The first one is based on the solution of power flow (PF) problem in the novel model of DC power supply system with the limited overhead contact system (OCS) receptivity. The second step consists in execution of an optimization-oriented procedure. The optimization criteria are defined as follows: net energy drawn from a traction substation, cost of inverter implementation and energy loss in a supplying medium voltage grid. The optimized variables are rated power of the inverter and its location as well as other parameters of the inverter, which may be selected optionally. The optimization procedure is based on a genetic algorithm (GA), the results are presented as Pareto-fronts. Among the Pareto-optimized solutions, the single solution is chosen based on the criteria of a payback period.

ACS Style

Włodzimierz Jefimowski; Adam Szeląg. The multi-criteria optimization method for implementation of a regenerative inverter in a 3 kV DC traction system. Electric Power Systems Research 2018, 161, 61 -73.

AMA Style

Włodzimierz Jefimowski, Adam Szeląg. The multi-criteria optimization method for implementation of a regenerative inverter in a 3 kV DC traction system. Electric Power Systems Research. 2018; 161 ():61-73.

Chicago/Turabian Style

Włodzimierz Jefimowski; Adam Szeląg. 2018. "The multi-criteria optimization method for implementation of a regenerative inverter in a 3 kV DC traction system." Electric Power Systems Research 161, no. : 61-73.

Conference paper
Published: 27 July 2018 in MATEC Web of Conferences
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The paper presents a Simulink model of a DC metro traction supply system with a stationary energy storage device (SESD). The simulation model consists of traction substations, a train model, and an energy storage device (ESD) with supercapacitors (SC). A new energy management strategy considering the line voltage and current, SC state of charge (SOC) and SC charging and discharging current is proposed. This method can improve the energy savings and manage the remaining energy. Simulation results provided in this paper justify the control method. The proposed model can be used with different ESD, such as batteries.

ACS Style

Petru Valentin Radu; Adam Szelag. Modelling of operation of a stationary energy storage device in metro rail transport for selection of its parameters. MATEC Web of Conferences 2018, 180, 1 .

AMA Style

Petru Valentin Radu, Adam Szelag. Modelling of operation of a stationary energy storage device in metro rail transport for selection of its parameters. MATEC Web of Conferences. 2018; 180 ():1.

Chicago/Turabian Style

Petru Valentin Radu; Adam Szelag. 2018. "Modelling of operation of a stationary energy storage device in metro rail transport for selection of its parameters." MATEC Web of Conferences 180, no. : 1.

Proceedings article
Published: 17 May 2018 in Road and Rail Infrastructure V
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ACS Style

Adam Szelag; Tadeusz Maciołek; Zbigniew Drążek; Marcin Steczek. Tram power supply infrastructure modernization for improving its energy efficiency – Polish case. Road and Rail Infrastructure V 2018, 1 .

AMA Style

Adam Szelag, Tadeusz Maciołek, Zbigniew Drążek, Marcin Steczek. Tram power supply infrastructure modernization for improving its energy efficiency – Polish case. Road and Rail Infrastructure V. 2018; ():1.

Chicago/Turabian Style

Adam Szelag; Tadeusz Maciołek; Zbigniew Drążek; Marcin Steczek. 2018. "Tram power supply infrastructure modernization for improving its energy efficiency – Polish case." Road and Rail Infrastructure V , no. : 1.

Proceedings article
Published: 17 May 2018 in Road and Rail Infrastructure V
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ACS Style

Jefimowski Włodzimierz; Adam Szeląg; Nikitenko Anatolij; Wieczorek Maciej. The optimization of supercapacitor module parameters of a stationary energy storage system in DC power supply. Road and Rail Infrastructure V 2018, 1 .

AMA Style

Jefimowski Włodzimierz, Adam Szeląg, Nikitenko Anatolij, Wieczorek Maciej. The optimization of supercapacitor module parameters of a stationary energy storage system in DC power supply. Road and Rail Infrastructure V. 2018; ():1.

Chicago/Turabian Style

Jefimowski Włodzimierz; Adam Szeląg; Nikitenko Anatolij; Wieczorek Maciej. 2018. "The optimization of supercapacitor module parameters of a stationary energy storage system in DC power supply." Road and Rail Infrastructure V , no. : 1.

Proceedings article
Published: 17 May 2018 in Road and Rail Infrastructure V
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ACS Style

Adam Szeląg; Mykola Kostin; Anatolii Nikitenko; Włodzimierz Jefimowski; Maciej Wieczorek. Application of a spectral theory for analysis of impulse stochastic processes of voltage and current of electric rolling stock in traction-regenerative modes. Road and Rail Infrastructure V 2018, 1 .

AMA Style

Adam Szeląg, Mykola Kostin, Anatolii Nikitenko, Włodzimierz Jefimowski, Maciej Wieczorek. Application of a spectral theory for analysis of impulse stochastic processes of voltage and current of electric rolling stock in traction-regenerative modes. Road and Rail Infrastructure V. 2018; ():1.

Chicago/Turabian Style

Adam Szeląg; Mykola Kostin; Anatolii Nikitenko; Włodzimierz Jefimowski; Maciej Wieczorek. 2018. "Application of a spectral theory for analysis of impulse stochastic processes of voltage and current of electric rolling stock in traction-regenerative modes." Road and Rail Infrastructure V , no. : 1.

Journal article
Published: 01 January 2018 in Technical Transactions
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Energy efficiency of a railway line supplied by 3 kv supply system – a case study of the application of an inverter in a traction substation

ACS Style

Zbigniew Drążek; Tadeusz Maciołek; Adam Szeląg; Marcin Steczek. Energy efficiency of a railway line supplied by 3 kv supply system – a case study of the application of an inverter in a traction substation. Technical Transactions 2018, 10, 99110 .

AMA Style

Zbigniew Drążek, Tadeusz Maciołek, Adam Szeląg, Marcin Steczek. Energy efficiency of a railway line supplied by 3 kv supply system – a case study of the application of an inverter in a traction substation. Technical Transactions. 2018; 10 ():99110.

Chicago/Turabian Style

Zbigniew Drążek; Tadeusz Maciołek; Adam Szeląg; Marcin Steczek. 2018. "Energy efficiency of a railway line supplied by 3 kv supply system – a case study of the application of an inverter in a traction substation." Technical Transactions 10, no. : 99110.

Journal article
Published: 01 January 2018 in Technical Transactions
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Assessment of AC traction substation influence on energy quality in a supplying grid

ACS Style

Włodzimierz Jefimowski; Adam Szelag. Assessment of AC traction substation influence on energy quality in a supplying grid. Technical Transactions 2018, 12, 127138 .

AMA Style

Włodzimierz Jefimowski, Adam Szelag. Assessment of AC traction substation influence on energy quality in a supplying grid. Technical Transactions. 2018; 12 ():127138.

Chicago/Turabian Style

Włodzimierz Jefimowski; Adam Szelag. 2018. "Assessment of AC traction substation influence on energy quality in a supplying grid." Technical Transactions 12, no. : 127138.

Journal article
Published: 01 October 2017 in Bulletin of the Polish Academy of Sciences Technical Sciences
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Electric traction vehicles cooperating with a 3kV DC traction system and equipped with drive systems based on voltage source inverters are the most significant sources of disturbances for a railway signalling system. Every traction vehicle to be authorised for operation on railway lines must fulfil the limits imposed on current harmonics magnitudes and those provided by railway operators. The solution introduced for prototypes of most modern traction drives is to replace the two-level inverters with three-level topology. Therefore, it is essential to establish the influence of the new solution on the railway signalling system. This paper presents a comparative analysis between simulation results delivered for two and three-level traction drive system regarding generation of disturbing current harmonics. Two types of VSI modulation techniques were taken under consideration: sinusoidal PWM (SPWM) and a new one, proposed by the authors, based on selective harmonic elimination (SHE). Furthermore, the authors presented application of one of the SHE based optimization techniques for shaping the EMU’s (electric multiple unit) DC side input current harmonics spectrum in order to meet the required limits. The described technique is based on off-line generation of a set of solutions for each of the VSI operating points and selection of the best solution for the assumed criteria. The applied simulation models and the concept of SHE control were verified in a laboratory by means of a low-power drive stand. Using the three-level inverter in traction drives system results in less current harmonics than using two-level topology without modification of the modulation technique. Thus, it does not guarantee fulfilling all limits assumed in this paper. The proposed modulation technique allows for fulfilling the limits, and the technical implementation of the proposed technique in a traction drive system will be considered in future studies.

ACS Style

M. Steczek; A. Szelag; D. Chatterjee. Analysis of disturbing effect of 3 kV DC supplied traction vehicles equipped with two-level and three-level VSI on railway signalling track circuits. Bulletin of the Polish Academy of Sciences Technical Sciences 2017, 65, 663 -674.

AMA Style

M. Steczek, A. Szelag, D. Chatterjee. Analysis of disturbing effect of 3 kV DC supplied traction vehicles equipped with two-level and three-level VSI on railway signalling track circuits. Bulletin of the Polish Academy of Sciences Technical Sciences. 2017; 65 (5):663-674.

Chicago/Turabian Style

M. Steczek; A. Szelag; D. Chatterjee. 2017. "Analysis of disturbing effect of 3 kV DC supplied traction vehicles equipped with two-level and three-level VSI on railway signalling track circuits." Bulletin of the Polish Academy of Sciences Technical Sciences 65, no. 5: 663-674.

Journal article
Published: 14 June 2017 in Archives of Transport
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Implementing high-speed trains on Polish railway lines requires a new approach to the issue of power and energy supply via a 3 kV DC power system. Due to the control systems used, modern rolling stock equipped with asynchronous drive allows maintaining a set speed, as far as a locomotive’s power and voltage in a catenary allow it. Characteristics of traction vehicles with asynchronous drives enables run at voltage lower than the rated voltage, however, it entails decrease of consumed power (required for locomotives with power above 2 MW) and loss of motion dynamics. Modernisation of a railway power supply system conducted in Poland since the mid-1990s of the 20th century has intensified in the past couple of years (so-called MUZ-I program) due to the purchase of Pendolino trains, and it primarily include the main lines. A number of modernisation investments (lines E65, E20, E30) are implemented with co-financing from the EU funds. Due to the predicted trains’ speed (200 km/h and above), in order to fulfil the requirements specified in TSI, a power supply system on these lines should ensure achieving high parameters, that is supply of trains with current up to 3.2 kA, while the so-called mean useful voltage should not be lower than 2.8 kV. The article presents solutions introduced on Polish railway and aiming at adjusting the power supply used to the TSI requirements. The range of conducted modernisation works allows for conclusion that the process is in fact a re-electrification of railway power supply systems.

ACS Style

Adam Szeląg. Electrical power infrastructure for modern rolling stock with regard to the railway in Poland. Archives of Transport 2017, 42, 75 -83.

AMA Style

Adam Szeląg. Electrical power infrastructure for modern rolling stock with regard to the railway in Poland. Archives of Transport. 2017; 42 (2):75-83.

Chicago/Turabian Style

Adam Szeląg. 2017. "Electrical power infrastructure for modern rolling stock with regard to the railway in Poland." Archives of Transport 42, no. 2: 75-83.

Conference paper
Published: 01 May 2017 in 2017 18th International Scientific Conference on Electric Power Engineering (EPE)
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This paper presents the design and simulation of an non isolated DC-DC Cuk converter. The input current control is provided with pulse-width modulation (PWM). A closed control loop is used with two proportional-integral (PI) controllers for the current and voltage. The DC-DC Cuk converter is used with Simulink cells for battery and supercapacitors (SC) to simulate the charging and discharging process for a stationary energy storage device (ESD). Simulations results are presented in Simulink.

ACS Style

Petru Valentin Radu; Adam Szelag. A Cuk converter integrated with lead-acid battery and supercapacitor for stationary applications. 2017 18th International Scientific Conference on Electric Power Engineering (EPE) 2017, 1 -6.

AMA Style

Petru Valentin Radu, Adam Szelag. A Cuk converter integrated with lead-acid battery and supercapacitor for stationary applications. 2017 18th International Scientific Conference on Electric Power Engineering (EPE). 2017; ():1-6.

Chicago/Turabian Style

Petru Valentin Radu; Adam Szelag. 2017. "A Cuk converter integrated with lead-acid battery and supercapacitor for stationary applications." 2017 18th International Scientific Conference on Electric Power Engineering (EPE) , no. : 1-6.

Journal article
Published: 14 April 2017 in IEEE Transactions on Industrial Electronics
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The paper presents an innovative concept of applying a combination of well-known selective harmonic elimination (SHE) and selective harmonics mitigation (SHM) methods to shape a spectrum of catenary current harmonics, generated by a traction drive system equipped with a voltage source inverter. Application of this method allows for reducing distorting influence of a modern rolling stock supplied by a 3 kV dc catenary on the railway signaling, command, and control systems. The efficiency of the proposed method is independent of synchronization of a vehicle's inverters and of load balance of traction motors, which makes it more reliable than as it is proposed in the literature. Results of computer simulations were presented and compared with laboratory measurements. The obtained dc-link current spectrum using the proposed SHE/SHM method was compared with spectra received using synchronized and unsynchronized sinusoidal pulse-width modulations (SPWMs). Based on the conducted tests, it was shown that the proposed method of control, which was implemented in a laboratory drive system, is effective in reducing dc side current harmonics in a frequency range of 1300-3100 Hz, which is used by track circuits on railway lines, e.g., in Poland. The technique proposed by the authors allows taking into account any restrictions arising from the technical nature of low-frequency traction drives.

ACS Style

Marcin Steczek; Piotr Chudzik; Adam Szelag. Combination of SHE- and SHM-PWM Techniques for VSI DC-Link Current Harmonics Control in Railway Applications. IEEE Transactions on Industrial Electronics 2017, 64, 7666 -7678.

AMA Style

Marcin Steczek, Piotr Chudzik, Adam Szelag. Combination of SHE- and SHM-PWM Techniques for VSI DC-Link Current Harmonics Control in Railway Applications. IEEE Transactions on Industrial Electronics. 2017; 64 (10):7666-7678.

Chicago/Turabian Style

Marcin Steczek; Piotr Chudzik; Adam Szelag. 2017. "Combination of SHE- and SHM-PWM Techniques for VSI DC-Link Current Harmonics Control in Railway Applications." IEEE Transactions on Industrial Electronics 64, no. 10: 7666-7678.

Conference paper
Published: 24 November 2016 in 2016 IEEE International Power Electronics and Motion Control Conference (PEMC)
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The regenerative braking is one of the most attractive ways for energy saving in electric transport. It has many advantages and its effectiveness is discussed in numerous researches, but there are no significant publications, which describe the power losses in the way of recovered current flowing. The paper describes an alternative method for estimating recovered energy losses in the elements of a DC electric transport system. In comparison with existing methods, it is based on the correlation theory of stochastic processes and takes into account the Fryze's concept for reactive power. The method is verified by the experimental researches, which are performed for the VL8, VL11M, VL11M6 locomotives, EPL2T multiple-unit train and T4D tram, which operate in DC sections, Ukraine. The losses are calculated for different elements of an electric transport system, and their theoretical and statistical distributions with basic probabilistic characteristics are shown. The results prove the validity and applicability of the method.

ACS Style

Adam Szelag; Mykola Kostin; Anatolii Nikitenko. Losses of recovered electric energy in the elements of a DC electric transport system. 2016 IEEE International Power Electronics and Motion Control Conference (PEMC) 2016, 412 -418.

AMA Style

Adam Szelag, Mykola Kostin, Anatolii Nikitenko. Losses of recovered electric energy in the elements of a DC electric transport system. 2016 IEEE International Power Electronics and Motion Control Conference (PEMC). 2016; ():412-418.

Chicago/Turabian Style

Adam Szelag; Mykola Kostin; Anatolii Nikitenko. 2016. "Losses of recovered electric energy in the elements of a DC electric transport system." 2016 IEEE International Power Electronics and Motion Control Conference (PEMC) , no. : 412-418.

Conference paper
Published: 01 September 2015 in 2015 International Conference on Electrical Drives and Power Electronics (EDPE)
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The paper proposes an application of a well-known method of Selective Harmonic Elimination in inverter's output voltage to influence an input traction current spectrum in a DC supplied traction vehicle with asynchronous motors. The aim is to reduce the values of current harmonics in frequency bands that are subject to limitations applicable on Polish railways. This paper introduces the possibility of modifying the method (Selective Harmonics Elimination - SHE) in such a way as to replace elimination of selective harmonics with their reduction (Selective Harmonics Reduction - SHR). Comparative analysis of the effectiveness of both these methods was based on computer simulation results. The important advantage of the SHR method, in comparison with the SHE methods, is the reduction of the required switching angles number with obtaining the aim of the application, i.e. current harmonics amplitudes below the defined limits. Some exemplary results of effectiveness of the proposed method are as well presented and discussed.

ACS Style

Marcin Steczek; Adam Szelag. Modification of the selective harmonic elimination method for effective catenary current harmonics reduction. 2015 International Conference on Electrical Drives and Power Electronics (EDPE) 2015, 394 -401.

AMA Style

Marcin Steczek, Adam Szelag. Modification of the selective harmonic elimination method for effective catenary current harmonics reduction. 2015 International Conference on Electrical Drives and Power Electronics (EDPE). 2015; ():394-401.

Chicago/Turabian Style

Marcin Steczek; Adam Szelag. 2015. "Modification of the selective harmonic elimination method for effective catenary current harmonics reduction." 2015 International Conference on Electrical Drives and Power Electronics (EDPE) , no. : 394-401.

Journal article
Published: 29 June 2015 in ACTA IMEKO
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Electric energy quality criteria relating to a DC supply system concern the circuits from the rectifiers installed in traction substations till the vehicle's current collector. Energy Law and related implementing provisions unequivocally state that an electrified transport system as the energy recipient shall fulfil the requirements regarding energy consumption, which are defined in the agreement. It imposes certain requirements for the railway power supply company. Introduction into traffic of the traction vehicles that are equipped with converter power electronics drive systems increased requirements regarding voltage quality in a DC catenary. At the same time, increase in share of non-linear recipients causes the increase of distortion in AC voltage supplying traction substations, and they also transfer to the DC side. Both these factors caused a change in operational conditions of the resonance smoothing filters hitherto used in rectifier traction substations supplied by AC medium voltage power lines. This paper presents a research and a case study of the problem of effectiveness of functioning of the used filters, from measurements allowing for problem identification to results of the studies of the proposed new solution of a filter and the results of observed exploitation of a prototype with the application of digital monitoring and diagnostics system.

ACS Style

Adam Szelag; Tadeusz Maciolek; Marek Patoka. Effectiveness of filters in 3 kV DC railway traction substations supplied by distorted voltage- measurements and diagnostics. ACTA IMEKO 2015, 4, 72 .

AMA Style

Adam Szelag, Tadeusz Maciolek, Marek Patoka. Effectiveness of filters in 3 kV DC railway traction substations supplied by distorted voltage- measurements and diagnostics. ACTA IMEKO. 2015; 4 (2):72.

Chicago/Turabian Style

Adam Szelag; Tadeusz Maciolek; Marek Patoka. 2015. "Effectiveness of filters in 3 kV DC railway traction substations supplied by distorted voltage- measurements and diagnostics." ACTA IMEKO 4, no. 2: 72.