Abstract
Stability studies are essential in determining the ability of power systems to overcome disturbances and retain synchronism. To this end, transient stability analysis (TSA) deals with instability due to large disturbances in the power system such as occurrence of faults, loss of generation, line outage, etc. Traditional TSA of single-machine infinite-bus (SMIB) systems relies on equal-area criterion and time-domain simulations based on simplified assumptions without modelling of the weather-dependent characteristics. Weather affects power flow analysis (PFA) and incorporating weather-dependent characteristics improves the accuracy of PFA and consequently impacts TSA by accurately estimating power system states. In this manuscript, the weather-dependent impacts are modelled and considered for TSA of SMIB systems. The impact of the weather on TSA is demonstrated by investigating the two transient stability indicators i.e. the critical clearing angle and the critical clearing time, whilst utilizing a year-long real weather dataset. Simulations carried out demonstrate the impact of weather on TSA of SMIB systems and highlight the significance of incorporating weather in power system transient stability studies.
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