Simulation and analysis of human body micro-shocks in the ion flow field near HVDC transmission lines

Wang, Donglai; Lu, Tiebing; Li, Xueshan; Chen, Bo; Xie, Li; Ju, Yang

doi:10.1016/j.elstat.2018.03.002

Cited by 12 publications

(8 citation statements)

References 20 publications

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“…The line current reaches 3.5 A after reclosing, which is far larger than the normal current. As mentioned in [41], when the interval between each disconnection is short, the capacity of each disconnection of HCB needs to accumulate the previous disconnecting capacity. Therefore, for permanent PPF, the capacity of HCB needs to accumulate three times of capacity, which requires very high capacity of arrester.…”

Section: Experiments Verificationmentioning

confidence: 99%

A coupling voltage based adaptive reclosing scheme for flexible DC grid

Wei

Zou

Zhang

et al. 2022

IET Generation Trans & Dist

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The total electric field around the DC line is composed of both the ion flow field produced by coronae and the electrostatic field produced by the conductor charge. Under the effect of the total electric field, the disconnected pole will generate a coupling voltage. Therefore, based on the coupling voltage, this paper proposes an adaptive reclosing scheme for flexible DC grid to prevent power supply interruption caused by temporary fault. First, the disconnected pole coupling voltage (DPCV) under the total electric field is analysed when single pole to ground fault (SPGF) and pole to pole fault (PPF) occur respectively. Then, according to the DPCV difference between permanent fault and temporary fault, a fault property identification (FPI) criterion is constructed. The scheme is very simple and not affected by the transition resistance, fault position and wiring mode which has high reliability. Compared with the non‐selective reclosing strategy, the adaptive reclosing scheme can avoid the secondary impact on the system from the permanent fault. Extensive simulations and experiments verify the effectiveness of the proposed adaptive reclosing strategy.

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Section: Experiments Verificationmentioning

confidence: 99%

A coupling voltage based adaptive reclosing scheme for flexible DC grid

Wei

Zou

Zhang

et al. 2022

IET Generation Trans & Dist

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“…External sources: Everyone is exposed inadvertently to alternative electrical currents and potential. Electric transmission lines with operating voltages higher than 765 kV raise serious questions about the impact of high-strength electric fields or shock on living organisms [38,39]. Many studies have investigated the harmful effects of power frequency (50/60 Hz) on the human body [38].…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Corrosion of the Ti–6Al–4V Orthopedic Alloy in Phosphate-Buffered Saline (PBS) Solution: Influence of Frequency and Potential

Torbati-Sarraf,

Ding,

Khakpour

et al. 2024

CMD

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This paper addresses the interplay between electrical fields in the human body and the corrosion behavior of Ti-6Al-4V alloy, a prevalent orthopedic material. The study investigates the impact of alternative electrical signals at different frequencies on the alloy’s electrochemical behavior in a simulated body environment. The human body always has natural sinusoidal potential due to, e.g., heart palpitations and brain/nervous system activities. Ignoring such natural activities may lead to underestimating the corrosion performance of the Ti-6Al-4V alloy in the body. By analyzing anodic and cathodic responses and the net faradaic current induced by alternating current potential, the research sheds light on the influence of electrical fields on corrosion rates. Understanding these dynamics could lead to improved implant materials, mitigating corrosion-related challenges and enhancing implant performance over the long term. Results of this work indicated that frequent oxidation and reduction at certain frequencies may induce corrosion and hinder biomimetic apatite formation, impacting osseointegration. Natural alternative currents in the body affect the corrosion performance of Ti-based implant alloys, highlighting the need for consideration in biomedical applications.

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“…Gunatilake et al provided experimental transient voltage and current during "micro shocks", established models in CDEGS and PSCAD/EMTDC, and compared them with experimental measurement results [13,14]. Wang et al conducted experiments using a metal human body model near a ±1100 kV High Voltage Direct Current (HVDC) line, measured the induced voltage and current of the human body, and analyzed the influence of resistance and capacitance parameters on transient current [15]. Li studied various phenomena the human body may suffer from electric shock under DC transmission lines, and compared the electric field characteristics of AC and DC transmission lines [16].…”

Section: Introductionmentioning

confidence: 99%

Research on Induced Electrical Characteristics of Agricultural Machinery Operating under Ultra High Voltage AC Transmission Lines in Agricultural Area

Hu,

Zhang,

Zhao

et al. 2024

PIER C

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In plain areas, the majority of the ultra-high voltage (UHV) transmission corridors are located in farmland. The induced voltage is generated on the metal casing of the machinery when agricultural machines are working on the ground near the transmission line. If the human body touches, transient electric shock (TES) may occur, causing displeasure and alarm to workers. Therefore, it is crucial to study the induced electrical characteristics in such scenarios. In this article, the finite element method (FEM) was employed to establish a model integrating a 1000 kV transmission line, tractor, and human body, and the induced voltage of the tractor and human body under the transmission line was calculated. Subsequently, a TES model was developed to calculate the current when an electric shock occurs. Finally, an experimental system was constructed in the area beneath the 1000 kV UHV AC line to measure the current characteristics of the human body during the TES. The results demonstrate that the induced voltage is contingent upon the position of research object and whether it is insulated from the ground. Additionally, ground conditions significantly influence the TES current induced by the voltage. Due to the electromagnetic shielding effect of the tractor's metal casing, the TES current experienced by the driver inside the machine is minimized. For ground staff, when the human body is insulated from the ground, the transient electric shock current they bear is smaller than that of the human body grounded.

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Simulation and analysis of human body micro-shocks in the ion flow field near HVDC transmission lines

Cited by 12 publications

References 20 publications

A coupling voltage based adaptive reclosing scheme for flexible DC grid

A coupling voltage based adaptive reclosing scheme for flexible DC grid

Unraveling the Corrosion of the Ti–6Al–4V Orthopedic Alloy in Phosphate-Buffered Saline (PBS) Solution: Influence of Frequency and Potential

Research on Induced Electrical Characteristics of Agricultural Machinery Operating under Ultra High Voltage AC Transmission Lines in Agricultural Area

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