城市燃气管道受动态交流干扰的影响规律及腐蚀风险分析

张玉星, 车明, 张诚, 李伟, 黄文尧, 覃慧敏, 邸鑫

doi:10.16577/j.issn.1001-1560.2023.0026

材料保护 >

2023 , Vol. 56 >Issue 1: 184 - 190

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0026

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城市燃气管道受动态交流干扰的影响规律及腐蚀风险分析

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北京市燃气集团有限责任公司，北京 100011

张玉星(1988 - )，高级工程师，硕士，研究方向为腐蚀与防护，电话:15201451152，E-mail:zyxustb＠163.com

收稿日期: 2022-08-10

修回日期: 2022-08-29

录用日期: 2022-09-25

网络出版日期: 2023-07-27

基金资助

北京市博士后科研活动经费(A062-2022)资助；

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Analysis on the Influencing Law and Corrosion Risk of City Gas Pipelines under Dynamic AC Interference

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Beijing Gas Group Co.， Ltd.， Beijing 100011， China

Received date: 2022-08-10

Revised date: 2022-08-29

Accepted date: 2022-09-25

Online published: 2023-07-27

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摘要

针对超大城市燃气管网不同压力级制在不同铁路线路影响下的干扰情况、干扰规律及腐蚀规律,选取了近10处与电气化铁路交叉、并行管道的37个测试桩进行24 h数据监测与分析,明确了北京地区受动态交流杂散电流的干扰规律及风险情况。结果表明:北京地区次高压及以上燃气管网受电气化铁路干扰影响明显高于中低压管网;城市燃气管网牺牲阳极阴极保护系统一定程度上对杂散电流干扰具有一定的排流缓解及抗干扰功能;与电气化铁路并行管道的交流干扰大于交叉管道,且峰值与机车位置有关;对于动态交流干扰的腐蚀风险,建议通过交流电流密度区间所占比例与断电电位相结合的方式进行评价。

关键词： 城市燃气; 电气化铁路; 动态交流; 干扰规律; 腐蚀风险

本文引用格式

张玉星, 车明, 张诚, 李伟, 黄文尧, 覃慧敏, 邸鑫 . 城市燃气管道受动态交流干扰的影响规律及腐蚀风险分析[J]. 材料保护, 2023 , 56(1) : 184 -190 . DOI: 10.16577/j.issn.1001-1560.2023.0026

Abstract

To clarify the interference situation, interference law and corrosion law of different pressure level system of mega-city gas pipeline network under the influence of different railroad lines, 37 test piles of nearly 10 pipelines crossing or parallel with electrified railroad were selected for a 24-hour data monitoring and analysis, and the interference law and risk situation of Beijing area under dynamic AC stray currents were identified. Results showed that sub-high voltage and above gas pipeline networks were significantly more affected by the interference of electrified railroad than medium and low voltage pipeline network in Beijing area;the sacrificial anode cathodic protection system of city gas pipeline network had a certain degree of drainage mitigation and anti-interference function for stray current interference;the AC interference on pipelines parallel with electrified railroad was greater than that on crossing pipelines, and the peak was related to locomotive location. For the corrosion risk under dynamic AC interference, it was recommended to evaluate it by combining the proportion of AC current density range with outage potential.

Key words： city gas; electrified railroad; dynamic AC; interference law; corrosion risk

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