Application of Electrical Conductivity Measurements in Material Research and in Solution of Technological Problems

Očenášek, Vladivoj; Luštinec, Jan; Cieslar, Miroslav; Bajcura, Matúš

doi:10.21062/ujep/181.2018/a/1213-2489/mt/18/5/805

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Consumed currents reach level of several tens of amperes, leading to influence the grid operation. The voltage deviations occur especially which can reach an undesirable level leading to deterioration the voltage quality parameters [1][2][3][4][5][6][7][8][9][10]. The voltage unbalance arises in non-symmetrically loaded grids and also during the unbalanced charging process of EVs [1,3,7].…”

Section: Introductionmentioning

confidence: 99%

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

Síťař¹,

Vyslouzil²,

Rakova³

et al. 2021

Manufacturing Technology

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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.

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Section: Introductionmentioning

confidence: 99%

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

Síťař¹,

Vyslouzil²,

Rakova³

et al. 2021

Manufacturing Technology

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The Utilisation of Physical Diagrams for the Modelling of Electric Vehicle Charging

Síťař¹,

Vyslouzil²

2019

Manufacturing Technology

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The paper describes the utilisation of several physical diagrams for the modelling of chosen electric car charging in alternative simulation software for an electric power system. The description and evaluation of possible ways for modelling of electric vehicle charging with the results that are sutable for basic energetic analysis are performed, and for all cases given models are used in chosen simulation circuits. Modelling of electric vehicle charging becomes important with the increasing trend of used electric cars and installed charging stations. Electric vehicle charging represents the rising amount of loads with nonstandard behaviour which has been connected to the distribution power grid. The behaviour of electric cars during charging is not the same as a standard passive load, which can be defined by consumed active power for a specified period of time. The charging process has a specific behaviour, which is derived by the type of a charging station and communication with the battery in the car. While charging the distribution grid is influenced. The undesirable occurred phenomena are unbalanced powers and generation of harmonics, which can cause voltage and current asymmetry in the grid and subsequently worsen electrical voltage quality. Furthermore, the load capacity of distribution lines is reduced and therefore the steep increase of loading limits their safety and economic usage.

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Application of Electrical Conductivity Measurements in Material Research and in Solution of Technological Problems

Cited by 2 publications

References 6 publications

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

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

The Utilisation of Physical Diagrams for the Modelling of Electric Vehicle Charging

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