Year 2019

• Distribution Transformer with Multi-Zone Voltage Regulation for Smart Grid System Application

  Publication

  • R. Strzelecki
  • W. Matelski
  • R. Małkowski
  • V. Tomasov
  • L. Wolski
  • A. Krahel

  - Year 2019

  The article presents four concepts of the multi-zone voltage regulation (MZVR) system. It is a combination of a distribution transformer with an on-load tap-changer, for step voltage regulation, and a power electronic converter, dimensioned for a fraction of MZVR power, realizing continuous voltage regulation, supplemented by a special switch, the so-called bypass. This allows voltage regulation at high resolution, wide range and...

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• Voltage Source Power Line Conditioner for Applications in Local Supply Systems

  Publication

  • R. Strzelecki
  • W. Matelski
  • R. Małkowski
  • V. Tomasov
  • L. Wolski
  • A. Krahel

  - Year 2019

  The paper presents the basic principles of operation of voltage source power line conditioners (VSPLC) as well as their energy and filtration properties. A 4-level cascade based Voltage Source Converter (VSC) is used as a voltage source. The advantages of this topology is relatively simple construction and simple way of balancing DC link voltages. Results of the theoretical and experimental investigations confirm good energetic...

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Year 2018

• Hybrid stepless distribution transformer with four-quadrant AC/DC/AC converter at low voltage side - simulation tests

  Publication

  • R. Strzelecki
  • W. Matelski
  • V. Tomasov

  - Przegląd Elektrotechniczny - Year 2018

  The article presents the work of the stepless hybrid distribution transformer (HT), as an alternative to the so far applied Automatic Voltage Regulator (AVR) solutions, used to control the voltage in the power system in terms of the fundamental harmonic. The HT is a combination of a conventional distribution transformer and an AC/DC/AC converter connected in series with the transformers secondary winding. In the work the basic...

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• Hybrid storage management system consisting of supercapacitors and AHI batteries

  Publication

  • L. Wolski
  • E. Łowiec
  • P. Bogusławski
  • A. Krahel
  • W. Matelski
  • R. Strzelecki

  - Year 2018

  In the article the hybrid storage, composed of Aqueous Hybrid Ion battery and supercapacitor was presented. The system was tested through simulation studies. The work also describes the construction and properties of the developed device meant to control the energy flow of the storage and a communication system for remote parameter supervision.

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• Selection of AHI + SC Hybrid Storage Based on Mathematical Models and Load Variation Characteristics

  Publication

  • M. Liedke
  • Ł. Eugeniusz
  • W. Matelski
  • L. Wolski
  • R. Strzelecki

  - Przegląd Elektrotechniczny - Year 2018

  The article deals with the design of a hybrid storage consisting of Aqueous Hybrid Ion battery (AHI) and supercapacitor (SC) modules. The selection of components is based on the knowledge of the load profile of the storage and the AHI battery and supercapacitor models. The paper presents the method of selecting components of the storage made of AHI batteries and supercapacitor modules The article includes an example of the hybrid...

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