关于牵引变电所防强电侵入措施的分析和建议

部分运行故障表明,接触网隔离开关的电源和控制电缆成为强电侵入变电所二次系统的入口,进而烧损变电所内电源和保护等设备,持续的大电流造成所内设备的严重破坏。本文重点对强电侵入变电所二次系统的机理、破坏能量及径路进行深入分析,并对《牵引变电所二次系统防强电侵入优化技术方案指导意见》中多项具体措施在实践应用中出现的问题和适用性作进一步探讨。

A part of operational failures show that:the power source and control cables of OCS disconnector become the entrance of the strong current intruding into the secondary system of substation.Then the power source and protection equipment are burnt down by the intruded strong current,and the continuous high current will lead to severe damage of equipment inside the substation.The paper analyzes with emphasis the mechanism,destruction energy and path of strong current intruding into the secondary system of substation,further discusses the problems occurred during the implementation and application of several measures specified in Guidance on Scheme for Technical Optimization of Preventing Strong Current Intruding into the Secondary System of Traction Substation and their adaptability.