摘要
由于高速铁路弓网离线存在随机性,离线可能发生在交流电压的任意时刻,所以需要研究离线时刻对弓网电弧特性的影响,以系统地研究弓网电弧机理。为此,基于在实验室中搭建的弓网离线模拟实验平台,进行了大量的随机离线放电实验,采集了不同离线时刻的电弧电压、电弧电流、相对光强波形及数据,并进行了统计分析。结果表明：静态弓网离线时的电弧燃弧时间在15～25 ms之间;在电压幅值上升区间（1～5 ms,11～15 ms）离线时的电弧相对光强较大,同时电弧电压的谐波含量较大;动态弓网离线时的电弧燃弧时间在1～8 ms之间;在电压幅值上升区间离线时的电弧燃弧时间要大于在电压幅值下降区间离线时的电弧燃弧时间,同时电弧电压的谐波含量较小。总之,离线时刻对静态及动态离线电弧的电气特性、燃弧时间、相对光强、谐波含量等均有不同程度的影响。
Offline can occur in any time of the AC voltage due to the pantograph-catenary offline randomness of the high-speed railway, influence of offline time on the characteristic of pantograph-catenary offline arc should be researched so that the mechanism of the offline arc can be studied systematically. Consequently, based on the pantograph-catenary offline simulation experiment platform that is set up in the lab, a large number of random offline discharge experiments are conducted. The waveforms and data of the voltage, current ,and relative light intensity of the are in different offline time are collected, thereby, the characteristics of the offline arc are statistically analyzed. The results show that, under the circumstance of static pantograph-catenary offline, the arcing time is between 15 ms and 25 ms and when the offline occurs in the rising section of the voltage amplitude （1-5 ms, 11-15 ms）, not only the relative light intensity of the arc is stronger, but also the harmonics content of the voltage are more abundant. On the other hand, under the circumstance of dynamic pantograph-catenary offline, the arcing time is between 1 ms and 8 ms and when the offline occurs in the rising section of the voltage, the arcing time is shorter and the harmonics content of the voltage amplitude is lower than those in the dropping section. In conclusion, the static and dynamic pantograph-catenary offline has different degrees of influence on the electrical characteristics, arcing time, relative light intensity and harmonic content of the arc respectively.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第11期3524-3532,共9页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2011CB711106)~~
关键词
高速铁路
弓网系统
离线时刻
电弧特性
燃弧时间
相对光强
谐波含量
high- speed railway
pantograph and catenary system
offiine time
arc characteristics
arc time
relative light intensity
harmonic content
