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http://dx.doi.org/10.5370/KIEE.2010.59.10.1856

Characteristics of the Current Density Induced Inside a Worker Near a Neutral Ground Reactor  

Min, Suk-Won (순천향대 공대 전기통신공학과)
Lee, Seung-Ho (순천향대 대학원 전기통신공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.59, no.10, 2010 , pp. 1856-1861 More about this Journal
Abstract
To reduce a high fault current, neutral ground reactors (NGR) were installed in the Korean substation. Current with several harmonic components flows in a NGR due to load unbalance in normal steady state and magnetic fields with several harmonic components are also generated around a NGR. As results of study, we found magnetic fields around a NGR in Korean substation included two harmonics, 180Hz and 540Hz. Magnetic fields of 180 Hz increased 3 times more current density inside a worker near a NGR than same magnitude magnetic fields of 60 Hz. We know a worker near a NGR may not meet ICNIRP guideline of 10(mA/$m^2$) due to several harmonic components.
Keywords
NGR; Induction current density; Harmonics; Worker;
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