基于布尔逻辑运算的地铁直流牵引供电系统直流母线过流保护方案研究
刘禹兴1郑淳淳1赖沛鑫2谢金莲2谢悦海2刘雅杰2
DC Bus Overcurrent Protection Scheme in Metro DC Traction Power Supply System Based on Boolean Logic Calculation
LIU Yuxing1ZHENG Chunchun1LAI Peixin2XIE Jinlian2XIE Yuehai2LIU Yajie2
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作者信息:1.广州地铁集团有限公司， 511430， 广州
2.广州市扬新技术研究有限责任公司， 510460， 广州
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Affiliation:1.Guangzhou Metro Group Co., Ltd., 511430, Guangzhou, China
2.Guangzhou Yangxin Technology Research Co., Ltd., 510460, Guangzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20245670
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中图分类号/CLCN:U231.8
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栏目/Col:供电与能源
摘要:
［目的］为实现地铁直流牵引供电系统直流母线过流保护的精准判断，提升该系统故障跳闸的选择性，在不增加设备及电流采样回路的基础上，需对直流母线过流保护方案进行研究。［方法］对地铁直流牵引供电系统在不同运行状态下与直流母线连接的各回路的电流方向及保护动作情况进行分析，利用布尔逻辑运算提炼整理出母线过流保护的逻辑判断依据。对基于GOOSE(面向通用对象的变电站事件)信息交互的工程实施方案，进行了直流母线过流保护逻辑节点的扩展。搭建基于HSR(高可用性无缝冗余)的环形网络结构测试平台，对直流牵引供电系统在正常运行、母线故障、直流进线上端故障及直流馈线故障等4种情况进行模拟分析。［结果及结论］设计的通过检测直流母线上进出线的正向过流保护动作情况来判断母线故障的方案，可以满足保护动作的可靠性与快速性要求，是一种集低成本、高可靠、实施简单等优点于一体的直流母线保护方案。该方案能实现母线故障的可靠跳闸，满足保护装置对选择性和速动性的要求。
Abstracts:
［Objective］ To enable accurate determination of DC (direct current) bus overcurrent protection in metro DC traction power supply system and enhance the selectivity of fault tripping in the system, the research on a suitable DC bus overcurrent protection scheme is required without increasing equipment or current sampling circuits. ［Method］ The current direction and protective operation status of various circuits connected to the DC bus are analyzed under various operating conditions of metro DC traction power supply system. Boolean logic calculations are used to extract and refine the logical basis for bus overcurrent protection. An engineering implementation scheme based on GOOSE (generic object-oriented substation event) information exchange is proposed, with an extension of the logical nodes for DC bus overcurrent protection. A circular network test platform based on HSR (high-availability seamless redundancy) is constructed to simulate and analyze the following four scenarios of DC power supply system: normal operation, bus fault, upstream fault on the DC incoming line, and DC feeder fault. ［Result & Conclusion］ The proposed scheme could determine bus faults by detecting forward overcurrent protection actions on incoming and outgoing lines of the DC bus. It meets the requirements for protection reliability and speed, offering a DC bus protection solution that integrates low cost, high reliability, and simple implementation. The scheme ensures reliable tripping for bus faults and satisfies the selectivity and rapid response requirements of protection devices.
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