500 kV充油海底电缆运行状态综合在线监测系统研究

海南联网系统500 kV海底电缆运行环境复杂多变,会直接影响到海底电缆的运行状态.为了有效掌握海南联网系统三相31 km海底电缆的运行状态,研究充油海底电缆运行状态综合在线监测技术至关重要.文中根据海底电缆实际运行监测要求,结合充油海底电缆捆绑通信光缆的这一特殊结构,开展了基于布里渊光时域分析的分布式光纤温度传感技术研究,建立了基于IEC 60287热路模型的充油海底电缆的温度热场分布的热路模型,研制了500 kV充油海底电缆运行状态综合在线监测系统,完成了系统的现场安装及挂网运行.该系统能实时监测海底电缆的温度、油流以及油压等运行参数,通过海底电缆温度、油流以及油压历史数据分析,表明系统可实时监测海底电缆的运行状态及稳定可靠运行.     

Development of 500 kV DC PPLP-insulated oil-filled submarine cable

This paper outlines the development of a 500 kV DC oil-filled submarine cable capable of transmitting 2800 MW with ±500 kV 2800 A bipole system. Polypropylene laminated paper (PPLP) was employed as the insulation material, which is the world's first application to DC cables. The conductor size is 3000 mm², which is the largest size for submarine cables ever put into practical use. Through various fundamental and prototype tests, the cable proved to have excellent electrical characteristics for DC voltage as well as transient overvoltage. The cable and accessories are undergoing a long-term accelerated aging test as the final confirmation of their reliability and stability     

500 kV充油电缆局部放电在线监测系统的研究

根据某水电厂500 kV充油电缆的运行方式,提出了500 kV充油电缆局部放电在线监测系统的整体方案,研制了整个在线监测系统的硬件和软件,开发了500 kV充油电缆局部放电在线监测系统,已投运于该水电厂A厂AB联络线500 kV充油电缆出线端终端的在线监测。监测结果表明,该系统不但可以准确计算、显示7个放电参量,并且可以显示4种放电谱图,能有效地判断绝缘的放电状态。     

Development of 500 kV dc PPLP-insulated oil-filled submarine cable

This paper outlines the development of a 500 kV dc oil-filled submarine cable capable of transmitting 2800 MW with a ±500 kV 2800 A bipole system. Although polypropylene laminated paper (PPLP) has been employed as ac cable insulation material, this is the world's largest first application to dc cables. The conductor size is 3000 mm², which would be the largest size for submarine cables. Various fundamental and prototype tests have proved that the cable has excellent characteristics electrically as well as mechanically. The cable and accessories are currently undergoing a long-term accelerated aging test as a final confirmation of their reliability and stability. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 120 (3): 29–41, 1997     

海底电力电缆的损伤分析与防护

随着社会经济的发展,海底电力电缆的应用已日益广泛,发挥着电能输送的重要作用.海底电力电缆工作环境复杂,受损原因和陆上电缆差异很大,一旦损坏修复周期长,社会影响大.为了确保海底电力电缆能够安全运行,其防护工作已迫在眉睫.分析了引起海底电力电缆损伤的因素,并从设计、施工、监测等几个方面提出防护措施,为保障海底电力电缆的安全敷设和稳定运行提供参考.     

Long-term reliability testing of 500 kV DC PPLP-insulatedoil-filled cable and accessories

This paper describes the results of a long-term reliability test of a newly developed 500 kV DC oil-filled cable and accessories that transmit up to 2800 MW. This is the largest capacity ever used for submarine cables. The test line was 500 m and consist of submarine cables, land cables and several kinds of accessories. An optical fiber sensor was first installed in the oil duct of the cable to measure the conductor temperature directly under application of DC voltage. From 1994 to 1996, the authors carried out an accelerated electrical and thermal aging test equivalent to 40 years, a load cycle test, a polarity reversal test and a transient overloading current test. Satisfactory breakdown strength was confirmed in the residual test which followed the long-term test. These results have been instrumental to the decision to construct 500 kV DC commercial submarine cable lines     

海底电缆综合监测关键技术及应用

跨海电网海底电缆由于缺乏有效的技术监测手段,导致海底电缆故障及停电事故时有发生。通过抽取海底电缆复合光纤作为分布式监测的传感元件,构建了海底电缆综合监测系统,实现对海底电缆运行状态实时在线监测,取得多项关键技术突破。重点介绍了利用光纤拉曼散射、布里渊散射和瑞利散射分别对温度、应变和振动特性反应敏感的技术原理,以及实现对海底电缆运行的温度、应变状态和振动事件进行分布式综合监测的技术成果,支撑了跨海电网安全稳定运行。该技术在实际应用中取得了显著效果,并且经济和社会效益突出,具有进一步推广应用的前景。     

基于AIS的海缆综合监控报警系统的研究和开发

海底电力电缆广泛应用于海岛间供电、海上作业平台供电、海上风电场、跨越江河海峡短程输电,易受到船锚损害。基于海缆监测的实际需求,在已开发的基于船舶自动识别系统的海缆防锚损监控报警系统的基础上,添加了视频监控、电标实时监控、电标报警等功能,综合监控海缆保护区域内的船舶动态、海缆警示电标实时信息、海缆保护区域内船只流量信息,对潜在危险报警提示,有效保护海缆。文章详细介绍了该系统的架构、功能、开发实现,开发出的基于船舶自动识别系统的海缆综合监控报警系统成功应用于舟山海缆监控,分析实际运行经验,验证了系统的可行性和有效性。     

广东—海南500 kV海底电缆输电系统电磁暂态研究

海南联网工程是中国第一个500kV超高压、长距离、较大容量的跨海联网工程,也是继加拿大本土与温哥华岛交流跨海联网工程之后、世界上第二个同类工程。文章研究了广东—海南500 kV海底电缆输电系统的电磁暂态问题,主要包括电缆参数、工频过电压、单相重合闸过程中的潜供电流和恢复电压、工频谐振过电压、操作过电压等,并在此基础上分析了500 kV海底电缆可选择的绝缘水平,为国内500 kV海底电缆输电工程的建设提供了依据。     

Cable Selection Methodology for Deep Water Power Transmission System Applications

A methodology has been developed to assist in the technical evaluation of power transmission cable system installation and operational risks and the selection of a cable design for application in deep water installation situations. The methodology involves the evaluation of eight defined technical selection criteria that provide either (1) an index of safety associated with various technical design aspects of a "Candidate" cable, or (2) an indication of the technological difficulty to manufacture, install, repair or operate each cable "Candidate." The cable selection methodology was developed to support the needs of a specific transmission cable application in Hawaii, but the methodology should be readily adaptable to other submarine power cable projects.     

高压交联聚乙烯绝缘海底电缆载流量分析

通过对海缆结构、材料、敷设方式和负荷特性等的阐述,综合分析了这些因素对海缆载流量的影响。以川岛联网工程海缆敷设为实例,提出满足系统输送容量要求的优化设计计算。     

国内外海底电缆工程研究综述

海底输电工程被公认为最复杂困难的大型工程,其中海底电缆的设计、制造和安装更是难度最大的。简要回顾了世界上海底电缆工程的发展历程,详细介绍了世界上主要海底电缆工程以及海底电缆的生产现状。并比较了不同绝缘形式的海底电缆的优缺点,分析了交、直流海底电缆的经济性和适用性,介绍了轻型直流电缆系统,展望了我国海底电缆的应用前景。     

Corrosion protection of 6-10-35-110-220-kV cable lines in St. Petersburg

Data on the corrosion protection system of the 6-10-35-110-220-kV power cable lines in St. Petersburg are given. Information on how to select equipment for units of cathode protection of 110-220-kV, oil-filled cable lines is given.     

胜利海上油田海底电缆悬空损伤分析及保护装置设计

胜利海上油田海底电缆悬空损伤,是影响海上电网平稳运行的最大安全隐患,详细论证和分析了涌浪载荷作用受力和涡致振动,认为涡致振动是造成海缆悬空损伤破坏的主要原因。为避免海底电缆悬空损伤,设计新型海底电缆保护装置,经过环境载荷计算、涌浪受力和装置的强度分析,提出了新型海底电缆保护装置的规范要求,达到了保护海底电缆免受损伤的目的。     

Systematization of insulation design technology for various electric power apparatus

This paper deals with cross-apparatus comparisons of an insulation design of electric power apparatus. Focusing on a gas insulated switchgear (GIS), an oil-filled transformer, a cable, and a capacitor, we summarize the different and common features of their insulation design on the basis of not only referring literatures but also the authors' experiences. The insulation design process has three evaluation steps. Each step optimizes its evaluation subject by considering the nature of an insulation medium or an insulation component, and the optimization result is different. However, it is common that the insulation design process has three steps without exceptions. The technology supporting the three steps is also common.     

大长度高电压海底电缆的无功补偿设计研究

针对国内尚无海底电缆无功规划类原则的现状,对海缆线路感性无功补偿问题进行了研究。文章采用集中参数模型和负荷形状系数对海底电缆及末端负荷进行建模,并依据《国家电网公司电力系统无功补偿配置技术原则》中的有关规定,对海缆无功补偿地点、补偿容量、分组方案和补偿效果进行了经济技术分析,建立以成本和网损费用最小化为目标函数的无功规划数学模型,形成1套较为完整的海底电缆无功规划方案,用于指导工程实际。最后以110 kV嵊泗联网工程为案例对上述规划方案进行验证,证实其效果良好。     

The field test of a cable internally cooled with fire resistant oil

Tricresyl phosphate (TCP), a phosphate ester with fire-resistant and insulating properties, is proposed as a cable cooling medium. A field test was performed with a 275 kV internally-oil-cooled, oil-filled (OF) power cable system using TCP, and it was ascertained that the cable system meets requirements for ease of installation, cooling characteristics, and long-term stability of the cable and the long-term stability of the cable and the TCP. The series of tests has demonstrated the practicality of the cable system     

广州抽水蓄能电厂主要输配电设备运行分析

简要介绍了抽水蓄能机组在电力系统中的作用,介绍了目前世界上装机容量最大抽水蓄能电站——广州蓄能水电厂中500kV电气主接线及其高压输配电设备的配置情况,并对其输配电设备如500kV充油电缆、主变压器、高压套管、线路阻波器设备、GIS气隔等的运行、故障情况进行了分析。强调了进口设备国产化的必要性。     

无功配置对海上风电场输出海缆损耗的影响分析

基于海上风电场输电系统模型和海底电缆参数,分析了海上风电场无功补偿配置方法和海缆损耗的计算方法,建立了海上风电场输电系统简化模型,计算了不同规模、不同传输距离海上风电场采用两端补偿和陆上单端补偿两种方案时输出海缆导体损耗,得到了海缆导体损耗-风电场出力曲线。在风电场低出力水平及长距离传输时,两端补偿损耗更低,而在风电场高出力水平或短距离传输时,单端补偿损耗稍低一些。     

我国发展直流海底电力电缆的前景

例举世界重要的海底电缆工程,表明其中大部分为直流海底电缆工程。叙述直流输电特点,着重以不同类型的直流和交流海缆载流量计算,证明直流海底电缆在输电容量、输电损耗和电缆线路长度限制方面显著优于交流海底电缆。肯定了我国发展直流海底电缆的必要性。有些运行条件下直流海底电缆会是优先的方案,甚至是唯一的选择。提出以发展直流交联聚乙烯(XLPE)海底电缆作为主要目标,并在比较不同类型海缆绝缘中的空间电荷对电场分布和电气绝缘性能影响和深入研究空间电荷积聚、抑制和移去机理基础上,积极研发抑制空间电荷积聚的XLPE绝缘料,作为关键技术突破,用于开发直流XLPE绝缘海底电缆,推进我国直流海底电力电缆的技术发展。