1-Pilot & Non-pilot Protection of Transmission Lines Essay

1-Pilot & Non-pilot Protection of Transmission Lines - Essay Example This is of course in addition to today’s independent systems. It is important to note that the emphasis in this paper is not on the pilot scheme to be used but rather on whether a pilot system would be necessary. This follows the realization that a typical pilot terminal would cost $150K more compared with a non-pilot terminal. The question in this case is why would someone spend so much on a pilot scheme rather than just take up a non-pilot system which is less costly? The answers to this question serve as the justifications for the pilot scheme. Taylor (1927) says that the pilot scheme come in with additional benefits such as improved resistive coverage, high speed reclosing, and improved sustainability compared with the non-pilot system. In addition, the pilot scheme comes with alternatives to protection including fall back strategies, extensions to Zone 1, and inverse time over current. The pilot system also provides extended considerations mainly used in the determination of the system’s redundancy usually dependent on a number of factors including security, reliability, and dependability. The pilot system is also preferred because of its free interactions with the regulatory issues (Taylor, 1927). The protection of a transmission line has been a unique concept in the sense that, the system’s zone limit will have to separate geographical locations. This is contrary to the concepts in other systems such as buses, capacitors, and transformers. The idea behind the transmission line protection system is the alignment of the system elements and the input devices in one location and provides room for the instantaneous configuration of tripping. With the pilot scheme, this is usually done with very little coordination problems (Kim, 1996). Following the alignment of the system elements and input sources, all terminals will be