Transient Stability Assessment of RVUNL Rajasthan Rajya Vidyut Utpadan Nigam Ltd using Artificial Neural Network

Abstract

One of the primary concerns of power systems is to maintain service of prescribed quality to its customer under all circumstances. A characteristic inherent to electric power system is that it operates under the presence of disturbances. The disturbances may be of external or internal origin. Irrespective of its origin its affect the operating condition of the system and can set the power system into dynamic motion of unintended nature newlinePower system stability refers to the ability of synchronous machines to move from one steady-state operating point following a disturbance to another steady-state operating point without losing synchronism. There are three types of power system stability, namely: Steady-state, transient, and dynamic stability. newlineSteady-stale stability involve, slow or gradual changes in operating points Steady-state stability studies are required to ensure that phase angles are not too large, that bus voltages are close to nominal values, and that generators, transmission line, transformers and other equipment are not overloaded newlineDynamic stability involves an even longer time period, typically several minutes. It is possible for controls to affect dynamic stability even though transient stability is maintained. The action of turbine-governors, excitation systems, tap changing transformers, and controls from a power system dispatch center can interact to stabilize or destabilize a power system several minutes after a disturbance has occurred newlineTransient stability involves major disturbances such as loss of generation, line switching operations, faults, and sudden load changes. Following a disturbance, synchronous machines frequencies undergo transient deviations from synchronous frequency (50Hz), and machine power angles change. The objective of a transient study is to determine whether or not the machines will return to synchronous frequency with new steady-state power angles. Changes in power flow, and bus voltages are also of concern. newlineTransient Stability Assessments (TSA) of a large-scale power sys