Manufacturing Technology 2021, 21(1):132-140 | DOI: 10.21062/mft.2021.015

The Power Load Model for Electric Vehicle Charging Modelling and its Utilisation for Voltage Level Studies and Cables Ampacity in Distribution Grid

Vladislav Síťař1, Tomáš Vysloužil1, Lenka Raková2, Tomáš Hruška3
1 Faculty of Mechanical Engineering, J. E. Purkyne University in Usti nad Labem. Pasteurova 3334/7, 400 01 Usti nad Labem. Czech Republic
2 Faculty of Electrical Engineering, University of West Bohemia in Pilsen. Univerzitni 2795/26, 301 00 Pilsen. Czech Republic
3 CEZ Distribuce, Teplicka 1086/10, Podmokly, 405 02 Decin. Czech Republic

When electrical energy is drawn by electric vehicles from charging stations at charging process the voltage drops and increased current loading of cable lines in distribution grid occur. Inasmuch the electrical grid is insufficiently dimensioned or at large amount electric vehicles concurrently charges without controlled charging system, the voltages could decrease under desired level in grid points. This leads to the deterioration of voltage quality in given grid. The higher cables current loading leads to active power losses increase and decrease their service life. The paper describes the utilisation of modelling the electric vehicles when charging by power load model in physical diagram implemented into alternative simulation software. The created charging station load model is used for solving of voltage studies in distribution grid and for the analysis of cable lines ampacity. The grid contains a small number of points and low penetration of charging stations. Voltage levels are solved when random operation of charging stations during the working day without controlled system. For other loads, the typified daily loads diagrams of households are used.

Keywords: Electric Vehicle Charging, Electric Vehicle Charging Modelling, Voltage Level, Cables Ampacity, Typified Daily Load Diagram
Grants and funding:

Supported by an internal grant – UJEP-IGA-TC-2019-48-03-2: Modelling of specific elements, sources and loads in distribution power systems while respecting the quality and transmission of electrical energy.

Received: October 19, 2020; Revised: January 19, 2021; Accepted: January 20, 2021; Prepublished online: February 10, 2021; Published: February 24, 2021  Show citation

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Síťař V, Vysloužil T, Raková L, Hruška T. The Power Load Model for Electric Vehicle Charging Modelling and its Utilisation for Voltage Level Studies and Cables Ampacity in Distribution Grid. Manufacturing Technology. 2021;21(1):132-140. doi: 10.21062/mft.2021.015.
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