Critical trajectory method for calculating CCT considering radial and single circuit systems

Abstract

Short circuit in the power system can lead problems in term of stability system. Transient stability becomes the main focus because it can determine the critical clearing time (CCT) to find critical time before generator loss of synchronization. The Critical trajectory method can be used to determine trajectory from the disturbance occurs to just before the generator loses its synchronization. The generator to be analyzed is a critical generator or generator with the biggest energy value. This causes the number of variables to equal the number of equations and can accelerate the calculation process. The method tested on the system with single line and radial system configuration. In the test results, it is seen that this method produces the correct CCT value by using Time Domain Simulation method as a comparison.