| 摘要: |
| 由于线路增长，行车密度增加等原因，地铁直流保护装置会出现误动、拒动的现象，设计更可靠的保护算法非常必要。研究分析了地铁直流牵引供电系统中主要的直流馈线保护方法，以电流上升率及电流增量保护为基础，提出一种基于电压电流变化量的地铁馈线保护新算法。应用AFB流程设计方法，实现了一种方便整定和修改的保护流程。通过仿真结果分析得出：这种新型保护算法能够快速精确地切除非金属接地和远端短路等故障，同时避开了列车启动电流的影响,切实可行。 |
| 关键词: 直流馈线保护 AFB流程 远端故障 机车启动电流 非金属性故障 |
| DOI：10.7667/j.issn.1674-3415.2014.04.020 |
| 投稿时间：2013-05-24修订日期：2013-09-22 |
| 基金项目: |
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| A novel metro DC feeder line protection algorithm based on AFB |
| DONG Chen-yang |
| (Tianjin Railway Survey Design Institute Group Corp, Tianjin 300251, China) |
| Abstract: |
| As the metro lines become longer and traffic density increases, malfunction or refusing action of metro DC feeder protection device occurs from time to time, so it is of great value to design a more reliable protection algorithm. This paper analyzes the main DC feeder protection of DC railway traction power supply system. Based on the rising rate of current and current increment protection, a novel algorithm with judgment of voltage and current variation for DC railway feeder line protection is proposed. With the help of AFB process design method, a protection process for convenient setting and modification is realized. By analyzing the simulation results, the algorithm can remove non-metallic grounding fault and remote fault fast and accurately, while avoiding the impact of the locomotive starting current, so it’s very practical. |
| Key words: DC feeder protection AFB process remote fault locomotive starting current non-metal fault |
