Measurement-based modeling of traction power supply system

As the rapid development of electrified railway, the proportion of traction loads in the power system is increasing, which imposes some hazardous effect to power system stability. Power system simulation is believed as an indispensable tool for power system planning, design, operation, research etc. Therefore, it is a important factor of research on the influence of traction loads to power system, which is how to construct the load model accurately reflecting the synthesis load characteristics of traction loads. To settle the time-variation problem of traction load in measurement-based load modeling, this paper uses the method of classification and synthesis for dynamic load characteristics. A novel improved load model is introduced based on the actual load structure of the traction power supply system. By the parameters identification, this paper provides recommended parameters of several different traction conditions. The results of a instance verify the improved description of measured data and the effectiveness and rationality of the method of the classification and synthesis. This paper provides the foundation of the research on the influence of traction loads to power system and putting forward corresponding measures.