Comparison of Direct Grounding and Non-grounding Methods according to the Power Supply Method for Power Supply to the Consumer Load

doi:10.15683/kosdi.2024.9.30.541

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2024 Vol.20, Issue 3 Preview Page Next Page

Original Article

Comparison of Direct Grounding and Non-grounding Methods according to the Power Supply Method for Power Supply to the Consumer Load 수용가의 변압기 중성점 직접접지 방식과 비접지 방식의 비교: 박기철¹*ㆍ박옥남²
Ki-Cheol Park¹*, Ok-Nam Park²; ¹Doctor’s Course, Department of Industrial Engineering, Sunmoon University, Asan, Republic of Korea
²Doctor, Department of Industrial Engineering, Sunmoon University, Asan, Republic of Korea

30 September 2024. pp. 541-548

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Abstract

Purpose: This study aims to compare the grounding methods of transformers currently used in most industrial sites in Korea to analyze the stability of power quality and the risk of electric shock. Method: The ungrounded method allows for continuous power supply even in the event of a single-phase ground fault, resulting in a lower risk of electric shock. In contrast, the solidly grounded method focuses on quickly cutting off power during incidents such as ground faults or lightning strikes to protect load equipment, as explained through literature comparison. Result and Conclusion: It is concluded that the ungrounded method is preferable in environments where continuous power supply is essential.

Keywords

Transformers

Grounding Method

Non-grounding Method

Risk of Electric Shock

Lightning Strike

연구목적: 본연구는 현재 국내 대부분의 산업 현장에서 전원공급을 위해 사용하는 변압기의 접지방식을 비교하여 전원설비의 전원 품질의 안정성과 감전 사고의 위험성을 비교 분석하고자 한다. 연구방법: 비 접지방식은 1선지락 사고 발생 시 전원공급을 지속적으로 할 수 있고 감전 사고에 대한 위험성이 낮고, 직접접지 방식은 지락이나 낙뢰 등의 사고 발생 시 전원 차단을 빠르게 하여 부하 설비를 보호하는데 중점이 있음을 문헌을 통해 비교 설명하였다. 결과 및 결론: 지속적인 전원공급이 필요한 곳에서는 비접지 방식을 사용하여야 한다는 필요성에 대해 결론을 내렸다.

키워드

변압기

직접접지

비접지

감전사고

낙뢰

References

Hong, J. (2022), New Architectural Electrical Equipment. Volum 1, Yeamoonsa, p. 45.
Hong, J. (2022). New Architectural Electrical Equipment. Volum 2,Yeamoonsa, pp. 255-246.
IEEE (1992). 142-1991- IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems. in IEEE Std 142-1991, US.
Joo, J.H. (2017). A Method of Determining the Ground Fault Protection System for Premises Distribution System. Master Degree, Department of Electrical Engineering and Computer Science Graduate School, Chungbuk National University.
Korea Electric Association (2024). KEC(Korea Electro-technical Code) 242.10.1~10.2, Seoul.
Korea Power Exchang (2014). Information on the Electricity Market, Naju.
Lee, J.-W. (2008). Shipping and Distribution Technician. Volum 1, Taeyoungbook, pp. 584-585.
Lee, M.-h. (2018). A Study on the Potential Rise and Impact on Lightning Arrester by Transformer and Grid Falt. Doctoral Thesis, Seoul National Univercity of Science and Technology
Lee, S.W. (2003). Grounding of Power System and Protective System for Line Ground Falts. Volum 2. Gidari, p 12.
National Legal Information Center (2023). Notification No. 2023-875 of the Ministry of Trade, Industry and Energy.
Oh, y.-t., Chang, w.-b. (2019). "A study on the improvement of the grounding method of the temporary distribution panel in apartment construction site." Journal of The Korean Society of Disaster Information, Vol. 2019, No. 09, pp. 231-232.
Son, s.-h. (2021). "A study on the effectiveness of ground resistance measurement method." The Korean Society of Disaster Information Conference, Vol. 2021 No.11, pp. 277-278.

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 20
No :3
Pages :541-548
DOI :https://doi.org/10.15683/kosdi.2024.9.30.541

[1] Hong, J. (2022), New Architectural Electrical Equipment. Volum 1, Yeamoonsa, p. 45.

[2] Hong, J. (2022). New Architectural Electrical Equipment. Volum 2,Yeamoonsa, pp. 255-246.

[3] IEEE (1992). 142-1991- IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems. in IEEE Std 142-1991, US.

[4] Joo, J.H. (2017). A Method of Determining the Ground Fault Protection System for Premises Distribution System. Master Degree, Department of Electrical Engineering and Computer Science Graduate School, Chungbuk National University.

[5] Korea Electric Association (2024). KEC(Korea Electro-technical Code) 242.10.1~10.2, Seoul.

[6] Korea Power Exchang (2014). Information on the Electricity Market, Naju.

[7] Lee, J.-W. (2008). Shipping and Distribution Technician. Volum 1, Taeyoungbook, pp. 584-585.

[8] Lee, M.-h. (2018). A Study on the Potential Rise and Impact on Lightning Arrester by Transformer and Grid Falt. Doctoral Thesis, Seoul National Univercity of Science and Technology

[9] Lee, S.W. (2003). Grounding of Power System and Protective System for Line Ground Falts. Volum 2. Gidari, p 12.

[10] National Legal Information Center (2023). Notification No. 2023-875 of the Ministry of Trade, Industry and Energy.

[11] Oh, y.-t., Chang, w.-b. (2019). "A study on the improvement of the grounding method of the temporary distribution panel in apartment construction site." Journal of The Korean Society of Disaster Information, Vol. 2019, No. 09, pp. 231-232.

[12] Son, s.-h. (2021). "A study on the effectiveness of ground resistance measurement method." The Korean Society of Disaster Information Conference, Vol. 2021 No.11, pp. 277-278.

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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