1 Correction to: Journal of Electrical Engineering & Technology https://doi.org/10.1007/s42835-020-00477-8

Unfortunately the acknowledgement has been omitted. It should be: This work was supported by the KEPCO grant #R17XA05-03 and by the Smart Grid Development of Core Technology Project of the KETEP grant funded by MOTIE, Korea NO. 20171210201080.