Study on power systems transient stability considering traction power supply system measurement-based load model

Research on the Influence of Traction Load on Transient Stability of Power Grid Based on Parameter Identification

“…The identification results indicated that the traction comprehensive load model differs greatly from the parameters recommended by the IEEE load modeling working group, and both the physical meaning and mathematical expression have changed, which is consistent with the description in reference [32], that is, the model parameters have a certain degree of "Inexplicability of physical meaning". However, this paper concluded that the relative power angle amplitude variation in traction load model is better than that of the industrial load model, which is different from the conclusion in reference [8], that the power angle variation characteristics of traction load model are better than the constant impedance load model. This phenomenon may be due to the complexity of traction load itself, and there are usually certain differences in the identification parameters of the traction load in different time and regions.…”

“…At present, research on traction comprehensive load models mainly focuses on the mechanistic load model of "induction motor parallel traction motor and constant impedance" [8,32,33]. We proposed the load model of third-order electromechanical transient induction motor parallel power function, which can achieve the improvement of calculation speed through the simplification of the model, and the improved IGWO algorithm is used for parameter identification, which can reflect the dynamic characteristics of traction load well.…”

“…In reference [8], the effect of the traction load model of DC locomotives on the transient stability of power grid after grid connection is analyzed from multiple perspectives, such as via load model comparison and the proportion of traction load in the power grid by using the time-domain simulation method. In reference [9], a modeling method of the impact load based on the power system simulation software BPA China version is proposed and applied to build simulation examples to analyze the effects of different types of impact loads on the transient stability of the power grid.…”

A New Estimation Method of Transient Voltage Stability Limit Clearing Time

“…This paper uses the BPA software to carry on the time domain simulation of IEEE30 bus system [3,4] . BUS10, BUS19 load to load 100% induction motor load, the BUS15 is set to 50% induction motor load and the constant impedance 50% constant current constant power load, the typical parameters of induction motor parameters.…”

“…Compared with the method in this paper, literature [3] belongs to the post judgment, and need to be repeated simulation test. According to the steady-state after fault, the literature [4] calculates the critical clearing time, while the stable state after the fault can be predicted, but this method is based on Thevenin equivalent, ignoring the nonlinearity of power system, transient not considering generator and induction motor response. The methods mentioned in literature [3,4] and in this paper are compared, the results are in table 1.…”