摘要
随着弓网离线率和离线程度的增加,弓网离线电弧现象频繁发生,而弓网离线电弧对受电弓滑板、接触网导线、供电质量、通讯信号和无线电信号的影响严重危害了列车运行安全。因此基于横向吹弧和纵向吹弧理论,研究了高速气流场对弓网电弧耗散功率的影响。考虑弓网电弧的弧柱拉伸、压缩以及强气流吹弧的能量交换,得到弓网电弧在起弧阶段中,电弧单位长度的耗散功率P与车速vc之间为一次函数关系,且弓网电弧在燃弧阶段中,两者为近似一次函数关系。根据能量平衡理论,运用Matlab/Simulink仿真软件,建立了弓网电弧的动态模型,并对比分析了弓网电弧仿真波形与实验波形。结果表明:第1个燃弧周期内起弧电压峰值约为35 V,第2个燃弧周期内起弧电压峰值约为30 V,且起弧阶段均有小燃弧过程;仿真波形与实测波形在整体趋势上较一致,验证了弓网电弧动态模型搭建的合理性。分析结果为研究弓网电弧特性提供了理论基础。
The pantograph-catenary arc occurs frequently along with the increase of separating rate and off-line degree of pantograph-catenary. The influence of the pantograph-catenary arc on pantograph sliding board, catenary wire, power quality, communication signals and radio signals threaten the safe operation of high-speed trains seriously. Consequently, we researched the influence of high-speed airflow field on the dissipated power of pantograph-catenary arc by using the theory of transverse blowing arc and longitudinal blowing arc. Considering stretching compression of the panto- graph-catenary arc column and the energy exchange under blowing arc of strong airflow, the relationship between dissipated power per unit length arc and the speed of the train is a linear function in the process of pantograph-catenary arc striking. And the relationship between dissipated power per unit length arc and the speed of the train is a linear func- tion approximately in the process of arcing. Based on the energy balance theory, the dynamic model of pantograph-catenary arc was established using the Matlab/Simulink simulation software, and the results of simulation waveforms and experimental waveforms were compared. The results show that the peak value of striking voltage is about 35 V during the first arcing period and the peak value of striking voltage will be about 30 V during the second arcing period. There is a small arcing process in the process of arc striking. The simulation waveform fits well with measured waveform in general. The dynamic model of pantograph-catenary arc is proved to be reasonable, which provides a theoretical basis for studying the electrical characteristics of pantograph-catenary arc.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第11期3593-3600,共8页
High Voltage Engineering
基金
国家自然科学基金(U1234202
51325704
51107104
51577158)
国家重点基础研究发展计划(973计划)(2011CB111054)~~
关键词
高速列车
弓网电弧
Matlab
弓网电弧动态模型
电气特性
弓网电弧耗散功率
电弧吹弧
high-speed trains
pantograph-catenary arc
Matlab
dynamic model of pantograph-catenary arc
electrical characteristics
dissipated power of pantograph-catenary arc ~ blowing arc
