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本文在现场实际测试和实验室模拟试验的基础上,从理论上分析了在不平衡冲击牵引电流的干扰下,相敏轨道继电器发生误动的机理。提出了扼流变压器增加气隙和应用25Hz适配器等抗冲击干扰措施。研制了试验电路,进行了室内试验。初步试验证明,采用上述措施后,25Hz相敏轨道电路抗不平衡冲击牵引电流的能力可从原来的10A提高到50A。如果综合采取措施,抗冲击干扰能力还可进一步提高。
Based on the field tests and laboratory simulation tests, this paper theoretically analyzes the mechanism of phase-sensitive orbit relay misoperation under the influence of unbalanced impact traction current. Proposed a choke transformer to increase air gap and the application of 25Hz adapters and other anti-jamming measures. Developed a test circuit, conducted a laboratory test. Preliminary tests show that, using the above measures, 25Hz phase-sensitive track circuit resistance to unbalanced impact traction current capacity from the original 10A to 50A. If taken comprehensively, anti-jamming capability can be further improved.