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交流输电线路对埋地金属管道的电磁影响研究

发布时间:2023-02-03 20:00
  高压交流输电线路会对同走廊的地下天然气/石油金属管道感应产生很大电压,尤其是在输电线路发生故障时产生的影响更加严重。高压交流输电线路在天然气/石油地下金属管道上产生的电磁场会产生有害电压,对人员、管道及其相关保护设备(如阴极系统)造成威胁。如果感应电压不符合标准,则必须采取抑制措施,将这些感应电压降至对人员和管道安全的水平。本文研究了 500kV交流输电线路的电磁场效应。针对交流输电线路稳态运行和接地故障故障两种不同工况下产生的电磁干扰,使用CDEGS软件进行了全面的分析。对于稳态运行的工况,计算获得的大部分结果与GB 6830-1986标准保持一致。但是,由于交流输电线路单相接地短路产生的高电流,使得地下管道及其邻近土壤发生电位抬升,感应电压超出ITU-TDL/T 5033-2006中规定的标准限值。为了解决这个问题,分析了两种不同类型的抑制措施(梯度控制线和接地电极)。通过仿真,发现所提出的抑制措施在不同水平的单相接地故障条件下都能大大降低两种情况下的感应电压。然而,梯度控制线技术能够将感应电压降低到比采用接地电极措施时更低的水平,因此建议采用前一种抑制措施,以将管道涂层感应电压降... 

【文章页数】:67 页

【学位级别】:硕士

【文章目录】:
摘要
Abstract
CHAPTER 1: General Introduction
    1.1 Background
    1.2 Research Status of Domestic and Overseas
    1.3 Layout of the thesis
CHAPTER 2: Literature Review
    2.1 Electromagnetic Interference Mechanism (Modes)
        2.1.1 Inductive (Electromagnetic) Interference
        2.1.2 Resistive (Conductive) Interference
        2.1.3 Electrostatic (Capacitive) Interference
    2.2 Electromagnetic Interference Limits
        2.2.1 Personal Safety Voltage
        2.2.2 Pipeline Safety
        2.2.3 AC Corrosion (Leakage Current)
    2.3 Electromagnetic Interference Mitigation
        2.3.1 Insulating Joints
        2.3.2 Lumped Grounding
        2.3.3 Cancellation Wires
        2.3.4 Gradient Control Wire
    2.4 EMI Calculation Method and CDEGS Software
        2.4.1 Calculation of induced voltage using Telegraph and Carson's Equations
        2.4.2 CDEGS software
    2.5 Summary of the chapter
CHAPTER 3: EMI Analysis under Normal Condition
    3.1 Description of the Case Study
    3.2 Case Study Simulation and Results Interpretation
    3.3 Application of Mitigation Systems
    3.4 Summary of this Chapter
Chapter 4: EMI Analysis under Single Phase to Ground Fault
    4.1 Introduction
    4.2 Simulation Results and Discussion
    4.3 Application of Mitigation Systems
    4.4 Summary of this Chapter
Chapter 5: Project Application
    5.1 Method of analysis of cases containing oblique proximity
    5.2 Description of the model Case Study
        5.2.1 Analysis under Normal Condition
        5.2.2 Analysis under Single Phase to Ground fault Condition
        5.2.3 Application of Mitigation Systems
    5.3 Summary of this Chapter
Chapter 6: Conclusion and Future Research
Reference
Publications
Acknowledgement


【参考文献】:
期刊论文
[1]特高压交流输电线路正常运行时对输油输气管道的感性耦合计算模型[J]. 齐磊,崔翔,郭剑,曹玉杰.  中国电机工程学报. 2010(21)
[2]交流输电线路对输油输气管道电磁影响的限值[J]. 郭剑,曹玉杰,胡士信,陆家榆.  电网技术. 2008(02)



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