1. School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
2. Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
3. Solar City Center, Korea Institute of Industrial Technology, Gwangju, 61012, Korea
4. Power System Laboratory, Korea Electric Power Corporation Research Institute, Dae-Jeon, 34056, Korea