Efficient identification of critical load model parameters affecting transient stability

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• The critical parameters are different for static load models and dynamic load models. • The induction motor parameters are more critical than static parameters. • The set of the most influential load buses remains the same for different load models. • The load size parameter is the most important parameter for different load models. • The importance of parameters will change for different loading levels. In this paper, an efficient sensitivity analysis (SA) technique is implemented to identify critical load model parameters affecting the transient stability of a power system. Transient stability is becoming more crucial in modern power systems due to the adoption of a deregulated market structure and an increasing penetration level of renewable generation. Research has revealed that power system loads have a significant influence on transient stability. Ranking of critical load model parameters ensures accurate power system simulation results with less effort and resources have been invested in building load models. The ranking has been made for different loading conditions in order to make the ranking applicable most of the time. Different types of load model have been applied to investigate their influence on transient stability. All simulations have been illustrated using a modified version of the 68 bus NETS-NYPS test system. The results revealed the important load model parameters and important loads, and the level of accuracy required for these critical parameters.