Discussion of "A new protection scheme for fault detection, direction discrimination, classification, and location in transmission lines"

In this paper, the author discusses the original paper "A New Protection Scheme for Fault Detection, Direction Discrimination, Classification, and Location in Transmission Lines" (see ibid., vol. 17, p.43-42, 2003). In that paper, the original authors proposed a new transmission line fault protective scheme using synchronized phasor measurements through global positioning system (GPS) satellites. The author believe the original authors should be commended for their paper investigating the proposed scheme extensively by numerous simulation studies. The discusser also asks the authors to further clarify and comment on several points.