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交直流输电管道绝缘运行安全关键技术

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交直流输电管道具有电压等级高、电磁辐射小、敷设灵活性强等优势,在超特高压输电领域弥补了架空线路和电缆铺设的局限性,具有广泛应用前景.影响输电管道运行安全的首要因素是绝缘故障,而其中两大重要诱因是内部微粒的荷电运动和气固界面的电荷积聚.该文系统化梳理国内外相关研究,包括微粒运动与电荷积聚的时空交互、微粒与电荷积聚耦合下的放电物理机制、绝缘子性能增强设计方法、微粒抑制技术等.在此基础上总结出亟待解决的两个关键难题以及需要攻克的技术瓶颈.针对荷电微纳粉尘随机动力学特性与其诱发微弱放电的物理机制,在测量基础上须突破粉尘可视化探测瓶颈,并发展粉尘动力学行为仿真方法,以及基于飞秒瞬态光谱特征的放电检测技术.针对基于电荷调控机制的主动式微粒活性抑制理论,须开发新型涂层材料的精准制备与稳定涂覆工艺,提出主动式微粒协同抑制方法,探索智能输电管道全生命周期数字孪生技术.上述问题的有效解决,可为提升交直流输电管道绝缘安全运行水平提供理论基础和技术支撑.
Key Technologies for Operation Safety of AC/DC Gas Insulated Transmission Lines
AC and DC transmission lines offer numerous advantages,including high voltage levels,large transmission capacities,reduced electromagnetic radiation,and enhanced laying flexibility.These transmission lines have effectively addressed the limitations of overhead lines and cables in ultra-high voltage transmission,resulting in extensive research and application.Insulation failure is the main cause of safe and stable operation issues in transmission pipeline equipment.Two significant sources of such failures include charged metal particles and charge accumulation at the gas-solid interface.This paper provides a comprehensive review of the research progress in the field,both domestically and internationally.The review covers several key aspects,encompassing the space-time interaction between particle charge motion and charge accumulation,the physical mechanism of discharge evolution considering the coupling effect of particles and charge accumulation,insulator performance control theory,enhancement design methods,and particle suppression technology.Building upon this review,the paper also identifies two critical problems that need immediate attention in ensuring the safe operation of pipeline insulation and outlines the technical bottlenecks that must be addressed.To solve the random charged dynamic behavior of micro-nano dust and the induced physical mechanism of weak discharge,it is crucial to overcome the bottleneck in visually detecting the motion behavior of micro-nano dust through advanced measurement techniques.Additionally,the development of a simulation research method based on molecular simulation for understanding charged dust's dynamic behavior and the utilization of discharge detection technology relying on femtosecond transient spectral characteristics are necessary.To address the active particle activity inhibition theory based on the charge regulation mechanism,it is essential to develop a new coating material with precise preparation and a stable coating process.Furthermore,an active synergistic particle inhibition method should be proposed to investigate the application of whole life cycle digital twin technology in transmission pipelines.Effectively working out the problems can significantly contribute to ensuring the safe operation of AC/DC transmission pipeline insulation,thus providing comprehensive support.

transmission linesmetal/nonmetal particlescharge accumulationinterface insulation enhancement designparticle synergistic inhibition

李庆民、薛乃凡、王媛、魏来、杨睿成、王健、李玄、王昌柱、耿秋钰

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新能源电力系统国家重点实验室(华北电力大学),北京市 昌平区 102206

北京市高电压与电磁兼容重点实验室(华北电力大学),北京市 昌平区 102206

输电管道 金属/非金属微粒 电荷积聚 界面绝缘增强设计 微粒协同抑制

国家重点研发计划项目国家自然科学基金国家自然科学基金中央高校基本科研业务费专项资金项目

2021YFB260140452127812519297012023JC005

2024

10.13334/j.0258-8013.pcsee.231163

中国电机工程学报
中国电机工程学会

中国电机工程学报

CSTPCD北大核心
影响因子：2.712
ISSN：0258-8013
年,卷(期)：2024.44(4)
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