内燃机车主电路接地故障检测诊断系统的研制

Research of Grounding Fault Detection and Diagnosis System for the Main Circuit of Diesel Locomotive

简要地分析了现有内燃机车主电路接地保护存在的不足,提出了一种无源电压型检测新方案,研制了适用于交—直流电力传动内燃机车主电路的接地故障检测诊断系统,全面地介绍了系统的原理、功能、组成和软硬件设计。该系统能够完全取代现有的机械式接地继电器,对机车主电路绝缘情况进行在线监测和故障诊断。

The shortages about existing grounding protection system for the main circuit of diesel locomotive are analyzed briefly in this paper, and a new passive voltage detection method is put forwards. The grounding detection and diagnosis system for the main circuit of AC/DC diesel locomotive is developed. The principle, the function, the structure and the software and hardware design of the new system are also presented. The system could detect and diagnose the main circuit of diesel locomotive on line instead of the existing relay.