Transient stability study in solar photovoltaic-wind plant based multimachine system

This paper presents the influence of non-conventional sources like central station solar photovoltaic model and wind plant model in multi-machine power system for transient stability. Modified four-generator system is studied by replacing one of the conventional synchronous generators with solar photovoltaic and wind generator model. The performance is compared with the classical four-generator system. The transient stability is achieved when the synchronous generator was replaced with the non-conventional source of same capacity. However, when penetration percentage is increased, the critical clearing time of a large disturbance fault is reduced. Thus, the addition of a non-conventional source to a multi-machine system should be done carefully, especially when the multi-machine power system undergoes large disturbances.