Due to complex operation scenarios in high-speed railway stations, the track circuit is prone to inter-ference from adjacent lines, resulting in the wrong decoding and indication of signals, even threatening the safety and efficiency of operation. According to the characteristics and structures of the track circuit of high-speed railway, the interference calculation models of adjacent lines in complex scenarios are established respectively, under the conditions of transmission line impedance balance and unbalance, based on the conductive and space coupling principles. Considering the dynamic operating conditions of locomotive, the interference value of adjacent lines under the most unfavorable conditions is quantitatively calculated, while using the ANSYS platform to complete the finite element simulation and verification of the calculation results. Focusing on the issue that the adjacent line interference is also affected by the interaction and mutual constraint of parameters including transmission level, number and capacitance of compensation capacitors, parallel length of lines, ballast resistance, shunting resistance, and line spacing, the artificial bee colony (ABC) intelligent algorithm is adopted to propose a neighboring line interference protection strategy based on multi-parameter collaborative optimization strategy. Further, the optimal values of each parameter and their contribution to signal to interference ratio (SIR) are given. The results indicate that: decoding errors will occur when the interference value of adjacent lines exceeds the sensitivity of onboard cab signals; applying the presented countermeasures to optimize the parallel length and transmitter power parameters in a field case study regarding the adjacent line interference, the SIR can be increased by 14.6 dB. These conclusions can be applied to the configuration and optimization practice of high-speed railway track circuits, providing engineering reference and analysis verification for the protection of adjacent line interference.
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