Direct Detection Method of Ground Fault by the Contact between High and Low Voltage Lines from Low Voltage Distribution Line Side for Three Phase Power Conditioners , , 138( 2), 69- 81, Feb. 1, 2018, 10.1541/ieejpes.138.69 

A basic study on novel islanding detection method for photovoltaic inverters by positive feedback of harmonic voltage , Journal of International Council on Electrical Engineering, 6( 1), 160- 165, Jul. 1, 2016,  

Islanding Prevention Method for Photovoltaic System by Harmonic Injection Synchronized with Exciting Current Harmonics of Pole Transformer , Journal of International Conference on Electrical Machines and Systems, 3( 3), 331- 338, Sep. 1, 2014,  

Analysis of Islanding-Prevention by Detecting Harmonic Voltage Considering Nonlinear Magnetizing Characteristics of Pole Transformer , Journal of International Council on Electrical Engineering, 3( 1), 12- 19, Jan. 1, 2013,