Arc net off-line electric arc mathematical model for calculating train speed

Abstract

The invention relates to an arc net off-line electric arc mathematical model for calculating the train speed. According to the site operation measured data that a high speed railway arc net off-line electric arc changes along with the train speed and the maximum off-line distance, and in accordance with the Habedank electric arc model, the voltage gradient constant and the wasted power constant of the electric arc model are revised, the electric arc dynamic mathematical model which is simple, effective and applicable to an arc net system is established, and the influence of different model parameter values on the dynamic property of the arc net electric arc model is analyzed in details. The proposed arc net electric arc model is introduced into an off-line process, and when the arc net is subjected to middle off-line, the off-line overvoltage of the arc net at different train speeds is simulated and analyzed; in addition, when the arc net is subjected to small off-line, the simulation result and the measured result of an arc net electric arc testing system are compared so as to verify the correctness of the established arc net electric arc mathematical model. The invention provides an effective tool for simulation study of the electrified railway arc net off-line electric arc and the transient process of the electrified railway arc net off-line electric arc and the transient process.

Description

technical field [0001] The invention relates to the field of arc model research in the off-line process of high-speed electrified railway catenary conductors and pantograph bows, including the establishment of pantograph-catenary arc mathematical models and the determination of arc model parameters. Background technique [0002] The high-speed railway traction power supply system completes the energy transfer through the sliding contact between the pantograph slide plate and the catenary wire. The continuous increase of the train speed aggravates the catenary fluctuation and the mechanical vibration of the train, resulting in frequent separation between the pantograph slide plate and the catenary wire, namely It is pantograph-catenary offline phenomenon. The field operation shows that when the train speed increases to 350km / h and above, the pantograph-catenary offline may increase to about 500 times in the joint section of the two adjacent anchor sections. Phenomenon. Arc ...

AI Technical Summary

Problems solved by technology

Compared with experimental research, model research is simple and practical, and overcomes the shortcomings of experimental research conditions such as limitations. There are many existing literature studies, and the existing arc model is generally used to study offline arc and offline overvoltage characteristics [Huang Changping. Pantograph-catenary offline pair Analysis of the impact of high-speed trains [D]. Chengdu: Southwest Jiaotong University, 2013: 13-18.], but rarely involved in the establishment of arc models suitable for pantograph-catenary systems

Based on the differential equation of pantograph-catenary arc energy conservation, Wang Jian et al. conducted a preliminary discussion on the deterministic model of pantograph-catenary arc, but did not conduct a detailed study on how to obtain the relevant parameters of the model and how different values ​​affect the dynamic characteristics of the arc model [Wang Jian, Wang Wei , Qu Zhijian, et al. Research on pantograph-catenary arc modeling based on energy conservation[J]. Electrified Railway, 2013, 2(5): 1-5.]

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