Abstract
The impact of electric car charging stations on power grid harmonics is growing as their existence continues to expand and creates harmonic distortion in the power system. At the same time, the quality of charging current and voltage through the process of charge becomes inferior. Therefore, reduction of output ripple factor (RF) and mitigation of input current harmonics is vital in this situation. This paper presents the design of the output filter and three kinds of shunt passive input filters to decrease the present harmonics generated in the industrial power scheme by the charging stations. The simulation software MATLAB/Simulink was used. Results were acquired before and after installation of filters and after installation of filters, it was found thatthe percentage RF of output current, voltage, and the percentage THD of the input current is reduced to match the set standards.
Highlights
Countries have started to create electric vehicles due to rising environmental pollution and increasing resource shortages, which require the development of comparable instruments, such as EV charging stations [1][2]
Current harmonic distortion occurs on the side of the charging station's Alternating Current (AC) due to the interconnection between the power grid and rectifier
Since there is no mathematical formula available to calculate the values of the capacitor and an inductor in capacitor-inductor filter[8][19], L and C are chosen by taking FFT for the output voltage or current XL = XC at the highest harmonic frequency
Summary
Countries have started to create electric vehicles due to rising environmental pollution and increasing resource shortages, which require the development of comparable instruments, such as EV charging stations [1][2]. The growing presentation of non-linear equipment in the form of charging stations will result in significant harmonious grid pollution [2][3][4] This can lead to some serious effects such as enhanced network losses and voltage fluctuations, heating issues and electrical equipment efficiency losses, power supply interruptions, or even large blackouts[3][4][5][6]. Since there is no mathematical formula available to calculate the values of the capacitor and an inductor in capacitor-inductor filter[8][19], L and C are chosen by taking FFT for the output voltage or current XL = XC at the highest harmonic frequency. The series filter is comparatively more costly and passive shunt filter is widely used as a harmonic filter It offers reactive power at the frequency of operation of the device
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