@article {10.3844/ajassp.2012.227.230, article_type = {journal}, title = {Investigation of the Critical Clearing Time of Power System with Synchronous Machine Model Including Saliency}, author = {Kumkratug, Prechanon}, volume = {9}, year = {2011}, month = {Dec}, pages = {227-230}, doi = {10.3844/ajassp.2012.227.230}, url = {https://thescipub.com/abstract/ajassp.2012.227.230}, abstract = {Problem statement: Most of synchronous generator applied in power system is the salient pole type. Most of previous researches use non-salient model to evaluate the critical clearing time. Thus the results of critical clearing time of power system may be error. Approach: Thus this paper investigate the critical clearing time of power system with synchronous machine. The mathematical model of non-salient pole and salient pole synchronous machine model in power system are symmetrically derived. The critical clearing time of both models are tested and compared on various cases. Results: The critical clearing time of the power system with synchronous including saliency is slightly higher that of non saliency model. Conclusion: It is found from simulation results that even swing curve of both models is obviously different. Their critical clearing times are slightly different.}, journal = {American Journal of Applied Sciences}, publisher = {Science Publications} }