The electrical power transmissionlines are generally spreads to a very long distances and all along lines run inexposed and different atmospheric conditions so, the possibility of occurrenceof unwanted fault in the power line is much higher than that of otherpower electrical equipment such as transformers and alternators. Dueto this reason transmission line requires more protective assembly thantransformers and alternators. 1 The main issues during fault in radial feeders are protectivedevices coordination with each other, potential establishment ofislanded systems and ground fault detection are the major aspects of concern.
The project aims focus on above defined problems and will providea qualitative solution to mitigate some of these issues when radial feedersare faulted.Protection of line should consumesome special features, such as-1. During the faulty situation enormouscurrents flow to the faulty place through the line, the only circuitbreaker closest to the fault point should be tripped.2. If the breaker nearest to the faultlocation, fails to trip, the circuit breaker just next to this breaker willtrip as back up and if that fails too, the very next CB must operate as abackup to both previous breakers.3. The operating time of that associatedrelay must be as minimum as possible at heavy fault current magnitudes and mustbe long enough for protection circuitry to coordinate with each other in orderto prevent unnecessary tripping of circuit breakers associated with otherhealthy parts of power system.
The project aims to cover a step bystep approach from practical modeling of theradialfeeder and to provide an intuitive approach for coordination of variousprotective devices on various modeled sections of the radial feeders and the impact of theemployed configuration on the power system. References 1 “Electrical4u,” Online. Available: https://www.electrical4u.com/protection-of-lines-or-feeder.