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http://dx.doi.org/10.5370/KIEE.2014.63.6.828

Development of DC Leakage Current Sensor for Solar Power Generation System  

Kim, Hee-Sun (Korea Electrical Engineering & Science Research Institute)
Hahn, Song-Yop (Korea Electrical Engineering & Science Research Institute)
Han, Hoo-Sek (Korea Electrical Engineering & Science Research Institute)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.63, no.6, 2014 , pp. 828-833 More about this Journal
Abstract
Grid connected transformerless solar power generation system is frequently used with the benefits of cost and efficiency. However, significant DC leakage current can flow from the DC line into the ground with dielectric breakdown in the transformerless solar power generation system. The leakage current occurred in the DC line causes accidents such as fire and electric shock on human. To resolve this problem, high sensitivity DC leakage current sensor is needed. But recently the studies on safety of DC line are not performed. In this paper, a high sensitivity DC leakage current sensor that can detect DC leakage current in solar power generation system, is proposed. Based on the studies, DC leakage current sensor is fabricated and characteristic tests are carried out. Finally, the accuracy of sensor performance is verified by leakage current experiments in solar power generation system.
Keywords
Solar power generation system; Magnetic saturation; DC leakage current sensor; Safety of electricity;
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