Supraharmonic and Harmonic Emissions of a Bi-Directional V2G Electric Vehicle Charging Station and Their Impact to the Grid Impedance

Energies

卷:15

Manfred Tragner¹  Bernhard Grasel¹  José Baptista² 

[1] Competence Field Renewable Energy Technologies, University of Applied Sciences Technikum Vienna, 1200 Vienna, Austria;

[2] Department of Engineering, School of Science and Technology, University of Trás-os-Montes and Alto Douro and INESC-TEC, UTAD’s Pole, 5000-801 Vila Real, Portugal;

关键词: power quality;    V2G;    supraharmonics;    harmonics;    THD;    TDD;   

DOI  :  10.3390/en15082920

来源: DOAJ

【 摘 要 】

Bidirectional electric vehicle supply equipment and charging stations (EVSE) offer new business models and can provide services to the electrical grid. The smart grid lab in Vienna gives unique testing possibilities of future smart grids, as different type of electrical equipment can be operated at a reconstructed, well-known distribution grid. In this work the harmonic and supraharmonic emissions of a bidirectional EVSE are measured according to IEC61000-4-7 and IEC61000-4-30 Ed3 standard as well as the high-frequency grid impedance. In addition, the efficiency and the power factor are determined at various operating points. Although THD_i at nominal power (10 kW) is very low and the efficiency and power factor is very high, at low power levels the opposite situation arise. Supraharmonic emissions remain stable independent of the charging/discharging power, and both wideband and narrowband emissions occur. The additional capacitance when connecting the EVSE impacts the high-frequency grid impedance substantially and generates resonance points.

【 授权许可】

Unknown