摘要
随着中国对能源的需求日益增加,特高压直流输电工程与长输管道工程的修建正大规模地进行。当直流接地极单极运行时,会有部分电流流入埋地金属管道,使金属管道发生电化学腐蚀,加速管道的破损。该文旨在系统地介绍特高压直流接地极入地电流对金属管道腐蚀的研究,包括管道在直流入地电流作用下加速腐蚀的机理及影响因素分析,入地杂散电流的检测评估方法及实际工程中典型的管道防腐措施介绍。对比由于电气化铁轨入地电流引起的管道腐蚀所采取的解决方案,对特高压直流接地极引起的管道腐蚀进行分析,最后给出相关研究方向的展望,并提出了对关键问题的解决思路。
With the increasing demand for energy in China, the construction of ultra-high voltage direct current（UH-VDC）transmission and long-distance pipeline is carried out on a large scale. When the DC grounding electrode oper- ates in monopolar mode, there will be some part of the current flowing into the buried metal pipeline, which will lead to the electrochemical corrosion of the metal pipe, speeding up the breakage of the pipe. The purpose of this paper is to systematically introduce the research on corrosion of metal pipes by the earthing current of UHVDC grounding electrode, which includes the mechanism and influencing factors of accelerated corrosion of pipeline under DC ground current, detection and evaluation of stray current in ground as well as typical measures of pipeline corrosion protection in practical project. Contrasting the solution of pipeline corrosion caused by the electrified rail, the pipeline corrosion caused by the grounding electrode of UHVDC is analyzed. Finally, the prospect of the research direction is given, and the solution to the key problems is put forward.
作者
廖敏夫
张晓莉
邢小羽
赵洋洋
段雄英
邹积岩
LIAO Minfu;ZHANG Xiaoli;XING Xiaoyu;ZHAO Yangyang;DUAN Xiongying;ZOU Jiyan(School of Eleetrieal Engineering, Dalian University of Technology, Dalian 116024, China;Dalian Power Supply Company, Dalian 116000, China)
出处
《高压电器》
CAS
CSCD
北大核心
2018年第7期44-52,共9页
High Voltage Apparatus
基金
国家自然科学基金(51277020
51477024
51337001)~~
关键词
直流接地极
金属管道
腐蚀机理
防腐
DC grounding electrode
metal pipeline
corrosion mechanism
anti-conosion
