The Resistive Ground Fault of PWM Voltage Inverter In The EV Charging Station

Mapping Intimacies ◽

10.21203/rs.3.rs-580057/v1 ◽

2021 ◽

Author(s):

Marta Zurek-Mortka ◽

Jerzy Ryszard Szymański

Keyword(s):

Power Supply ◽

Harmonic Frequency ◽

Frequency Converters ◽

Charging Station ◽

Ground Fault ◽

A Value ◽

Ground Current ◽

Voltage Frequency ◽

Ev Charging ◽

Current Device

Abstract During the direct touch of the inverter output voltage, the nonsinusoidal ground currents with a basic harmonic frequency between 1.5 kHz and 16 kHz, flow via a human’s body. Here was proved that Residual Current Device (RCD) type AC/IΔn = 30 mA does not switch off the power supply when a ground current with a value of about some hundred milliamps occurs. Because RCDs do not disconnect the power supply, the touch on the inverter’s voltage is dangerous to the health and life. For the authors, RCD usage in Voltage Frequency Converters is not a good engineer practice. The article presents tests of RCD operation in the event of a ground fault during EV battery charging.

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The resistive ground fault of PWM voltage inverter in the EV charging station

Scientific Reports ◽

10.1038/s41598-021-00715-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Marta Zurek-Mortka ◽

Jerzy R. Szymanski

Keyword(s):

Power Supply ◽

Common Mode ◽

Voltage Inverter ◽

Frequency Converters ◽

Charging Station ◽

Ground Fault ◽

A Value ◽

Ground Current ◽

Voltage Frequency ◽

Flow Through

AbstractDuring the direct touch of the inverter output voltage or with the ungrounded shield of the cable connecting the inverter to the motor or other type of load, the nonsinusoidal ground currents with a basic harmonic frequency between 1.5 and 16 kHz, flow via a human’s body. Here was proved that Residual Current Device (RCD) ($$I_{\triangle n}$$ I ▵ n = 30 mA) does not switch off the power supply when a ground current with a value of about some hundred milliamps occurs. Because RCDs do not disconnect the power supply, the touch on the inverter’s voltage is dangerous to health and life. For the authors, the RCD usage in the Voltage Frequency Converters (VFCs) is not a good engineer practice when high-frequency common-mode distortion currents flow through it. The paper presents tests of RCD operation in the event of a resistance ground fault (via human body) during EV battery charging where the PWM voltage inverter is connected to the external rectifier to provide DC charging battery voltage. Finally, the authors propose a method of eliminating common-mode (CM) current from short protection system by using a separate circuit in which the parasitic leakage current omits an RCD.

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Discussion on the Mode of Electric Vehicle Power Supply Infrastructures Construction and Operation in China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.3902 ◽

2011 ◽

Vol 347-353 ◽

pp. 3902-3907

Author(s):

Liang Liang Chen ◽

Ming Wu ◽

Hao Zhang ◽

Xiao Hua Ding ◽

Jin Da Zhu

Keyword(s):

Electric Vehicle ◽

Electric Vehicles ◽

Power Supply ◽

Energy Supply ◽

Large Scale ◽

Operation Mode ◽

Charging Station ◽

Combination Mode ◽

Ev Charging

The energy supply infrastructures construction is the prerequisite and basis for the large-scale promotion and application of electric vehicles (EVs). The characteristics and current construction situation of several EV power supply infrastructures in China such as AC charging spot, charging station and battery swap station are introduced first, and the characteristics of time combination mode and space combination mode for the construction of EV charging facilities are also discussed. Meanwhile, the features of operation mode for EV power supply infrastructures in different developing stage of are analyzed, and the main bodies for EV power supply infrastructures construction are also introduced.

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Simulation Study of System Operating Efficiency of EV Charging Stations with Different Power Supply Topologies

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.494-495.1500 ◽

2014 ◽

Vol 494-495 ◽

pp. 1500-1508 ◽

Cited By ~ 2

Author(s):

Yu Huang ◽

Jing Jing Ye ◽

Xin Du ◽

Li Yong Niu

Keyword(s):

Power Supply ◽

Simulation Analysis ◽

Power Conversion ◽

Operating Efficiency ◽

Power Cable ◽

Charging Station ◽

Comparative Results ◽

Charging Stations ◽

Ev Charging ◽

System Operating

This paper discusses the effect of power supply and power conversion structure on system operating efficiency of an EV charging station. The system efficiencies of two EV charging stations (ECS), AC bus (ABECS) and DC bus (DBECS), are evaluated by a simulation analysis. The effect of power conversion structure is investigated by an analytical model constructed in MATLAB. Based on the battery characteristics, we build an energy loss model of various components of EV charging stations with different topologies including distribution transformer, power cable and charger with different conversion structure. Using this model, the system operation efficiencies of charging stations equipped with an AC or a DC supply bus are compared. The comparative results for both power supplies, acquired by the appropriate MATLAB/Simulink simulations, are presented.

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Research on Capacitance Current Treatment Methods in Mine High-Voltage Power Grid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.1021 ◽

2012 ◽

Vol 229-231 ◽

pp. 1021-1024

Author(s):

Dan Xu ◽

Na Guo

Keyword(s):

Coal Mine ◽

Power Supply ◽

Single Phase ◽

Current Treatment ◽

Automatic Tracking ◽

Ground Fault ◽

Arc Suppression Coil ◽

Testing Data ◽

Ground Current ◽

Capacitance Current

In view of the coal mine neutral point ungrounded system when single-phase ground fault occurs, the grounding capacitance current is too big affect the security of coal mine powe supply.The paper analyzed testing data of capacitance current of coal mine network, established a treating scheme of capacitance current according to evaluating results, namely automatic tracking compensation arc suppression coil devices. The running results show that the scheme limits the size of the ground current and decreases rate of accidents of arc grounding over-voltage, which is good for improving the power supply safety.

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The Architecture Design of Electrical Vehicle Infrastructure Using Viable System Model Approach

Systems ◽

10.3390/systems9010019 ◽

2021 ◽

Vol 9 (1) ◽

pp. 19

Author(s):

Mahdi Boucetta ◽

Niamat Ullah Ibne Hossain ◽

Raed Jaradat ◽

Charles Keating ◽

Siham Tazzit ◽

...

Keyword(s):

Urban Space ◽

Electric Vehicles ◽

Reference Model ◽

System Model ◽

Ecosystem Structure ◽

Viable System Model ◽

Charging Station ◽

Viable System ◽

Station Location ◽

Ev Charging

Exponential technological-based growth in industrialization and urbanization, and the ease of mobility that modern motorization offers have significantly transformed social structures and living standards. As a result, electric vehicles (EVs) have gained widespread popularity as a mode of sustainable transport. The increasing demand for of electric vehicles (EVs) has reduced the some of the environmental issues and urban space requirements for parking and road usage. The current body of EV literature is replete with different optimization and empirical approaches pertaining to the design and analysis of the EV ecosystem; however, probing the EV ecosystem from a management perspective has not been analyzed. To address this gap, this paper develops a systems-based framework to offer rigorous design and analysis of the EV ecosystem, with a focus on charging station location problems. The study framework includes: (1) examination of the EV charging station location problem through the lens of a systems perspective; (2) a systems view of EV ecosystem structure; and (3) development of a reference model for EV charging stations by adopting the viable system model. The paper concludes with the methodological implications and utility of the reference model to offer managerial insights for practitioners and stakeholders.

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