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http://dx.doi.org/10.5207/JIEIE.2007.21.10.035

The Determination of Reference Impedance on 1P2W Low Voltage System in Korea  

Kang, Moon-Ho (전력연구원 배전품질안전그룹)
Song, Yang-Hyao (산업자원부 기술표준원 전기전자표준팀)
Lee, Heung-Ho (충남대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.21, no.10, 2007 , pp. 35-39 More about this Journal
Abstract
Home appliances, like air-conditionals, washers, refrigerators, etc., can cause voltage fluctuations and light flicker. A standardized flicker test has been established in Europe(IEC 61000-3-3, IEC 61000-3-11). The supply impedance of power supply system varies from plate to place, and for the flicker test in KOREA, the appliance manufacturers do need standardized impedance like the one indicated in IEC 61000-3-3 for 230[V]/50[Hz]. Without it, the same appliance will have different flicker level at different places. For appliance manufacturers, the flicker limit should be related to the reference impedance. However, the European flicker test is designed for 230[V]/50[Hz] power and needs to be modified for a 1P2W(220[V]/60[Hz]) supply system in KOREA. In this paper, the reference impedance for KOREA(220[V]/60[Hz]) systems is proposed. The measured result provided in this paper was served as a proposal for establishing KOREA reference impedance for 220[V]/60[Hz] and has been published in IEC 60725.
Keywords
Reference Impedance; System Impedance; Low Voltage System; IEC 60725;
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  • Reference
1 N. H. Cho, Y. H. Song, et al., 'The determination of reference impedance for a public LV power supply system and standardization of a flicker measurement method', Final term Report, KEPRI, 2005
2 IEC TR 60725, 'Consideration of reference impedance and public supply network impedance for use in determining disturbance characteristics of electrical equipment having a rated current $\leq$ 75A per phase', 2005
3 N. H. Cho, H. H. Lee, et al., 'The Study for the harmonic standard in distribution system', Final term Report, KEFRI, 2005