IT접지 저압직류배전 수용가에서의 인체감전 영향 및 접지 임피던스 선정에 관한 연구

다국어 초록 (Multilingual Abstract)

All over the world, renewable energy had been gotten attention because of the clean energy, low-cost. and so on. The solar generation and energy storage system(ESS) which are based on the DC power system have different characteristics from the general AC system and are close to the end-user of the electric. For these reasons and other positive aspects, the low voltage direct current(LVDC) system, had been studied. The LVDC system has a more complex configuration since the power sources and ground types in IEC 60364. One of them, IT system has the earthing impedance at source and it is more safe than other ground types in aspect fault current passing the human body. So, it has been expected to be used in end-user system. Until now, most of the studies about the LVDC system was related to the power distribution system like load unbalance, fault analysis, efficiency, and so on. However, the standards about the earthing impedance at the power source for electrical safety did not exist. So, in this paper, the selection of the earthing impedance in IT LVDC system has been studied in an aspect of human electrical safety. For the research, the simulation was performed based on IEC 60364 and IEC 60479 through the Matlab/Simulink and test experiments were conducted. Through the research, it was confirmed the electrical safety according to the source types, voltage level and earthing impedances. Also, it was analyzed the selection of earthing impedance value for the less human effect when the electrical shock occurred.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 저압직류배전의 구성 및 특징
• 3. 접지 임피던스에 따른 인체영향 분석
• 4. 결론
• References

참고문헌 (Reference)

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3 T. Wang, "Voltage Selection and Personal Safety in Low Voltage Direct Current Networks at Customer End" 2018

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7 IEC, "IEC 60479-1"

8 IEC, "IEC 60364-1"

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