Analysis of ground wire fault in the section of incoming lines of electrified railway traction station

摘要

The paper analyzes reasons for the failure of strain clamp hardware in the power supply line of an electrified railway traction substation, carries out strain clamp material test, grounding current measurement, arc simulation and other relevant tests, and the reasons for the fault are analyzed as follows: the contact surface is narrow between the strain clamp steel anchor and the U-shaped hanging ring because of the connection structure between them, which is likely to result in gap under the influence of vibration and other environment factors, thus giving birth to suspended potential and bringing about arc ablation under the joint effects of voltage, current and environment and melting and fracturing them gradually. The paper also proposes control measures and recommendations against the fracture fault of strain clamp hardware involved in the power supply line at the side of traction substation system. side power supply line of traction substation.