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牵引供电系统中避雷器在线监测的研究

DOI: 10.16188/j.isa.1003-8337.2015.03.016, PP. 89-95

Keywords: 牵引供电,金属氧化物避雷器,阻性电流,DSP,ADS

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Abstract:

在牵引供电系统中由于避雷器长时间受到工频电压、冲击电压和环境因素的影响而老化,或者由于装配工艺的不良,致使密封缺陷而引起的受潮,而老化或者受潮会使避雷器的绝缘性能受到破坏,导致避雷器失效而引发热崩溃,乃至发生爆炸,因而监测避雷器的运行状态显得尤为重要。而阻性电流中的基波分量Ir1能够反应出避雷器的运行状况,为此设计了基于DSP的避雷器的在线监测系统,此系统采用外部24位ADC芯片ADS1256采集信号,可以提高数据的准确度。在本系统中所有的电路均采用工业级电路,系统设计合理,稳定性好,抗干扰能力强,成本低、简单智能,对保障牵引供电系统的稳定性起着重要的意义。

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