Mikołaj Bartłomiejczyk - Publications - Bridge of Knowledge

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Year 2025
  • Electrifying the bus network with trolleybus: Analyzing the in motion charging technology
    Publication

    - APPLIED ENERGY - Year 2025

    Currently, electric buses are becoming more and more popular, and their number in operation is increasing. The range of electric buses is also increasing and solutions that seem to be working almost without fixed infrastructure are being promised. However, this requires the use of high-capacity batteries, which increases the weight and price of the vehicle and causes high costs of battery replacement during operation. Moreover,...

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Year 2024
  • Advancing Urban Transit: Gepard and CAR projects - Innovations in Trolleybus Technology
    Publication

    - Year 2024

    The Gepard project in Gdynia, Poland, revolutionized the city's trolleybus network with the introduction of “Trolleybus 2.0” vehicles and an innovative charging system. “Trolleybus 2.0” vehicles combine features of traditional trolleybuses and electric buses boasting traction batteries for autonomous driving and dual legal approval. Statistical analysis of energy consumption informed the development of a hybrid charging concept,...

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Year 2023
  • Terminal charging scheduling of battery electric buses based on vehicle routing problem
    Publication

    - Year 2023

    Electric buses are considered to be a viable solution for reducing emission in dense urban areas. However, the greater charging time is a huge challenge for operators. In this paper, charging scheduling method was elaborated based on vehicle routing problem using mixed-integer linear programming model. The main novelty of the paper is the combination of modelling aspect, namely flexible turn sequence and heterogeneous shared charging...

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Year 2022
  • Application of Traction Supply System for Charging Electric Cars
    Publication

    - ENERGIES - Year 2022

    The development of electromobility involves the development of electric cars charging infrastructure. The increase of the number of chargers poses new demands for the AC power grid, especially in regard to its capacity of delivering high peak power. As an alternative for the public AC power grid, urban electrified transportation systems (trams, trolleybuses, and metro) can be used for supplying electric cars chargers. The article...

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  • Compensation of Voltage Drops in Trolleybus Supply System Using Battery-Based Buffer Station
    Publication

    - ENERGIES - Year 2022

    This paper analyzes the results of a trial operation of a battery-based buffer station supporting a selected section of trolleybus power supply systems in Pilsen, Czech Republic. The buffer station aims to prevent the catenary from excessive voltage drops in a part of the route that is most remote from the traction substation. Compensation of voltage drops is carried out by continuously measuring the catenary voltage and injecting...

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  • Innovative Bidirectional Isolated High-Power Density On-Board Charge for Vehicle-to-Grid
    Publication
    • R. Hrbáč
    • L. Hrdina
    • V. Kolar
    • Z. Slanina
    • V. Blazek
    • T. Vantuch
    • M. Bartłomiejczyk
    • S. Misak

    - SENSORS - Year 2022

    This paper deals with developing and implementing a bidirectional galvanically isolated on-board charger of a high-power density. The power density of the new charger was 4 kW/kg and 2.46 kW/dm3, and the maximum efficiency was 96.4% at 3.4 kW. Due to the requirement to achieve a high-power density, a single-stage inverter topology was used. Regarding switching losses, due to the topology of the circuit with so-called hard switching,...

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