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针对高速铁路建设中出现的局部四线并行情况,为防止同载频并行轨道电路间干扰信号误动CTCS-3和CTCS-2级列控系统车载或地面设备,必须对干扰信号进行定量分析并采取防护措施。基于钢轨间的互感和线间距建立耦合干扰计算机仿真模型,定量分析近端干扰和调谐区位置不利情况下ZPW-2000A无绝缘轨道电路间的耦合干扰。分析结果表明:在等线间距条件下,调谐区对位比调谐区错位情况时耦合干扰电压大;耦合干扰电流随轨道并行长度和轨道电路载频频率增大而增大。以广深铁路并行四线为例计算同载频并行轨道电路对列控系统车载和地面设备的干扰量,并据此建议在线间距小于14 m时,对重合的调谐区改变并行区段轨道电路载频的频率或者进行调谐区错位处理。
In view of the local four-line parallelism that appears in the construction of high-speed railway, in order to prevent the interference signal between the parallel track circuit of carrier frequency from being accidentally disturbed by the CTCS-3 and CTCS-2 train control system vehicle or ground equipment, the interference signal must be quantitatively analyzed and Take protective measures. Based on mutual inductance and line spacing between rails, a computer simulation model of coupling interference was established to quantitatively analyze the coupling interference between ZPW-2000A uninsulated track circuits under the condition of near-end interference and tuning area unfavorable. The analysis results show that the coupling interference voltage is larger when the tuning area is more aligned than the tuning area under the condition of equal line spacing. The coupling interference current increases with the parallel length of the track and the carrier frequency of the track circuit. Taking the parallel four lines of Guangshen Railway as an example, the interference of on-board and ground equipment of train control system with the same carrier frequency parallel track circuit is calculated. Based on this, it is suggested that when the line spacing is less than 14m, the parallel section track circuit The frequency of the carrier frequency or the tuning area is misplaced.