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在铁路供电系统中,由于牵引变电所的继电保护装置不能识别分叉式专用线接触网的故障电流,在分叉处设置开关站,可以快速切除专用线接触网故障,保障干线接触网的安全供电。接触网故障电压电流变化快、波形畸变较大,造成故障诊断困难。本文应用数学形态学对检测信号进行图像处理,采用模糊数学评判有效数据,保证诊断正确。利用GSM网络短消息,使调度对开关站进行无线遥控方便经济。实际运行表明:开关站性能稳定,满足铁路供电的现场需要。
In the railway power supply system, because the relay protection device of the traction substation can not identify the fault current of the catenary dedicated line catenary, setting the switch station at the bifurcation can quickly remove the catenary fault of the catenary and protect the catenary Safe power supply. Contact network fault voltage and current changes quickly, larger waveform distortion, resulting in fault diagnosis difficult. In this paper, the mathematical morphology of the detection signal for image processing, the use of fuzzy mathematics to judge the effective data to ensure that the diagnosis is correct. The use of GSM network short message, so that the scheduling of wireless remote control switch station convenient and economical. The actual operation shows that the switch station has stable performance and meets the needs of railway power supply on site.