Current harmonics of EV chargers and effects of diversity to charging load current distortions in distribution networks

Kütt, Lauri; Saarijärvi, Eero; Lehtonen, Matti; Mõlder, Heigo; Niitsoo, Jaan

doi:10.1109/iccve.2013.6799884

Cited by 15 publications

(7 citation statements)

References 9 publications

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“…EVs with a significant on-board energy storage which can be recharged via the distribution network are commonly battery electric vehicles (BEVs) and plug-in hybrid vehicles (PHEVs). Due to the similarity of the battery charging process [5], in this paper such vehicles are all referred to as electric vehicles (EVs). EVs are usually equipped with batteries having an energy storage capacity up to several tens of kWh.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Harmonic Issues in Distribution Grids due to High Share of Electric Vehicles

Domenico

Obushevs

Korba

2020

2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)

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with the advent of power electronics, the application of solid-state electronics for the control and conversion of electric power is substantially increasing at the expenses of simple rotating machines and linear loads. This leads to power quality problems due to the sinewave distortion of current and voltage caused by such power-electronics-based equipment. Consequently, the investigation and understanding of harmonic emissions caused by those devices become of major importance in order to assure a continuous and reliable operation of the electrical distribution grid. The following paper aims to investigate the harmonic issues in distribution grids, due to power electronic devices with particular focus on electric vehicle chargers.

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Section: Introductionmentioning

confidence: 99%

Investigation of Harmonic Issues in Distribution Grids due to High Share of Electric Vehicles

Domenico

Obushevs

Korba

2020

2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)

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“…In [22,23], it was shown that distortion limits would be exceeded when charging in relatively weak grids. The combination of four different EVs, and what their cancellation effect does to phase-angle diversity, was analyzed in [24]. Analysis was made during constant-charging mode, during which the phase angles were assumed to be constant.…”

Section: Introductionmentioning

confidence: 99%

Measurement-Based Current-Harmonics Modeling of Aggregated Electric-Vehicle Loads Using Power-Exponential Functions

Foskolos

2020

WEVJ

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This paper presents an aggregate current-harmonic load model using power exponential functions and built from actual measurement data during the individual charging of four different fully electric vehicles. The model is based on individual emitted current harmonics as a function of state of charge (SOC), and was used to deterministically simulate the simultaneous charging of six vehicles fed from the same bus. The aggregation of current harmonics up to the 11th was simulated in order to find the circumstances when maximal current-harmonic magnitude occurs, and the phase-angle location. The number of possible identical vehicles was set to four, while battery SOC, the start of charging, and the kind of vehicle were randomized. The results are presented in tables, graphs, and polar plots. Even though simulations did not consider the surrounding harmonics, supply-voltage variation, or network impedance, this paper presents an innovative modeling approach that gives valuable information on the individual current-harmonic contribution of aggregated electric-vehicle loads. With the future implementation of vehicle-to-grid technology, this way of modeling presents new opportunities to predict the harmonic outcome of multiple electric vehicles charging.

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“…Next, the increase of load due to unplanned EV installations could create a chaotic situation due to harmonic increment, especially on the distribution system. Many studies have been conducted on this impact, especially on its relationship with harmonic pollution [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…This occurs as a result of a large amount of harmonic produced by industrial loads, which will later cause more effects on the grid if CS are present. Harmonic produced by the CS based on practical measurement in [6][7][8][9] shows that the harmonics are mainly dominated by the low-order odd harmonics, which are third, fifth, seventh, and ninth. However, the harmonics produced seem to be very small for higher-order harmonics and can normally be neglected.…”

Section: Introductionmentioning

confidence: 99%

Minimization of harmonic distortion impact due to large‐scale fast charging station using Modified Lightning Search Algorithm and Pareto‐Fuzzy synergistic approach

Nasir

Jamian

Mustafa

2018

IEEJ Transactions Elec Engng

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The increased number of nonlinear loads in the distribution system has caused a significant impact on its power quality in the form of higher harmonic distortion. The fast charging station (FCS) is an example of a powerful nonlinear load that is currently being widely promoted with the aim of supporting the continuous usage of electric vehicles (EV). The most common and cheapest method to minimize harmonic impact is through the use of a passive filter. This paper presents an optimal sizing and placement of a passive filter design based on the numbers of FCS installed in the distribution system. The MATLAB/m-file platform is used to model the power system harmonic flow, passive filter, and FCS. The control strategy used to minimize the total harmonic distortion (THD) due to the large number of FCS is presented based on the selection of optimal location and the size of passive filters that will provide minimum THD and apparent power losses to the overall distribution system. A Modified Lightning Search Algorithm (MLSA) technique is applied with the aim of identifying the optimal solution. The Pareto-Fuzzy technique is used to obtain a better solution among nondominated solutions. From the result, the optimal placements and sizes of passive filter will be able to reduce the maximum THD and also the total losses in the distribution system, which is equipped with 17 FCS units. This study is useful as a guide for grid owners to control the impact of large-scale FCS deployment in the distribution system.

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Current harmonics of EV chargers and effects of diversity to charging load current distortions in distribution networks

Cited by 15 publications

References 9 publications

Investigation of Harmonic Issues in Distribution Grids due to High Share of Electric Vehicles

Investigation of Harmonic Issues in Distribution Grids due to High Share of Electric Vehicles

Measurement-Based Current-Harmonics Modeling of Aggregated Electric-Vehicle Loads Using Power-Exponential Functions

Minimization of harmonic distortion impact due to large‐scale fast charging station using Modified Lightning Search Algorithm and Pareto‐Fuzzy synergistic approach

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