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Statistical characteristics of transient enclosure voltage in ultra-high-voltage gas-insulated switchgear 被引量:2
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作者 Yuanji CAI Yonggang GUAN Weidong LIU 《Plasma Science and Technology》 SCIE EI CAS CSCD 2017年第6期74-81,共8页
Transient enclosure voltage(TEV),which is a phenomenon induced by the inner dielectric breakdown of SF_6 during disconnector operations in a gas-insulated switchgear(GIS),may cause issues relating to shock hazard ... Transient enclosure voltage(TEV),which is a phenomenon induced by the inner dielectric breakdown of SF_6 during disconnector operations in a gas-insulated switchgear(GIS),may cause issues relating to shock hazard and electromagnetic interference to secondary equipment.This is a critical factor regarding the electromagnetic compatibility of ultra-high-voltage(UHV)substations.In this paper,the statistical characteristics of TEV at UHV level are collected from field experiments,and are analyzed and compared to those from a repeated strike process.The TEV waveforms during disconnector operations are recorded by a self-developed measurement system first.Then,statistical characteristics,such as the pulse number,duration of pulses,frequency components,magnitude and single pulse duration,are extracted.The transmission line theory is introduced to analyze the TEV and is validated by the experimental results.Finally,the relationship between the TEV and the repeated strike process is analyzed.This proves that the pulse voltage of the TEV is proportional to the corresponding breakdown voltage.The results contribute to the definition of the standard testing waveform of the TEV,and can aid the protection of electronic devices in substations by minimizing the threat of this phenomenon. 展开更多
关键词 transient enclosure voltage (TEV) gas-insulated switchgear (GIS) ultra-high-voltage (UHV) repeated strike process DISCONNECTOR
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Overview of development, design, testing and application of compact gas-insulated DC systems up to ±550 kV 被引量:3
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作者 Maria Kosse Dejun Li +1 位作者 Karsten Juhre Mark Kuschel 《Global Energy Interconnection》 2019年第6期568-578,共11页
The development of high-voltage direct current gas-insulated switchgear assemblies(DC GIS)of rated voltages up to±550 kV has been completed.DC GIS provide a compact technical solution with a high functional densi... The development of high-voltage direct current gas-insulated switchgear assemblies(DC GIS)of rated voltages up to±550 kV has been completed.DC GIS provide a compact technical solution with a high functional density,optimized for projects with limited space as in offshore HVDC converter platforms,onshore HVDC converter stations and transition stations between different transmission media.Up to now,no standards for testing of gas-insulated DC systems are available,although pre-standardization work is in progress within CIGRE.Some tests can be performed as required in AC GIS standards.Special aspects of DC voltage stress,like the electric field distribution of insulators influenced by the accumulation of electrical charge carriers and the operation-related inhomogeneous temperature distribution,must be considered by additional electric and thermoelectric tests.For DC GIS,the experience of long-term performance is limited today.Although ageing is expected to be of lower importance,tests are recommended.This contribution summarizes the physical and technical background to design and develop compact DC switchgear assemblies using gas-insulated technology.It explains the developed modules of the substation and gives an overview of the performed tests.Furthermore,it provides an insight in the on-going standardization activities and describes applications in converter and transition stations,showing its space-saving characteristics. 展开更多
关键词 Direct current gas-insulated switchgear assemblies DC GIS Direct current gas-insulated transmission lines DC GIL Modular design Underground installation Containerized installation Offshore platform installation Transition station
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220kV GIS设备出厂试验探讨
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作者 杨景立 《中国科技期刊数据库 工业A》 2023年第7期25-29,共5页
GIS是Gas-insulated metal-enclosed Switchgear中主要单词首字母缩写即气体绝缘金属封闭开关设备通常成为高压开关设备。本文对核电站用220kV GIS设备出厂试验包含的试验项目、试验目的、试验实施等进行了较详细的论述。220kV是电网系... GIS是Gas-insulated metal-enclosed Switchgear中主要单词首字母缩写即气体绝缘金属封闭开关设备通常成为高压开关设备。本文对核电站用220kV GIS设备出厂试验包含的试验项目、试验目的、试验实施等进行了较详细的论述。220kV是电网系统标称电压,设备一般以最高电压Um的有效值命名产品型号,这也符合国标GB/T11022《高压开关设备和控制设备标准的共用技术要求》中4.2.1、GB311.1-2012《高压输变电设备绝缘配合》表2中的规定。电压等级220kV和252kV为同一等级,某核电站220kV GIS设备主要的出厂试验项目有:回路电阻测量、SF6水份测量、SF6气密试验、雷电冲击试验、耐压及局部放电测量。 展开更多
关键词 gas-insulated metal-enclosed switchgear SF6 出厂试验
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特高压GIS设备现场标准雷电冲击耐压试验技术的应用 被引量:36
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作者 文韬 张乔根 +2 位作者 赵军平 陶风波 贾勇勇 《电力工程技术》 2017年第1期30-33,53,共5页
气体绝缘金属封闭组合电器(GIS)在电力系统中应用广泛,其运行安全可靠对电力系统至关重要。现场雷电冲击耐压试验受制于设备体积和回路电感,难以在GIS变电站,尤其是特高压GIS变电站应用。本文分析了目前GIS设备冲击耐压试验现状,并从波... 气体绝缘金属封闭组合电器(GIS)在电力系统中应用广泛,其运行安全可靠对电力系统至关重要。现场雷电冲击耐压试验受制于设备体积和回路电感,难以在GIS变电站,尤其是特高压GIS变电站应用。本文分析了目前GIS设备冲击耐压试验现状,并从波形参数、电压极性和加压间隔时间等方面阐述了GIS设备冲击电压绝缘缺陷检出影响因素。基于研发的特高压GIS变电站现场冲击耐压试验用的可移动式气体绝缘标准雷电冲击试验成套设备,成功在1000 kV南京站和苏州站开展了现场标准雷电冲击耐压试验。 展开更多
关键词 气体绝缘金属封闭组合电器(GIS) 现场绝缘耐压试验 冲击耐压试验 标准雷电冲击 冲击电压发生器 特高压GIS变电站 gas-insulated metal-enclosed switchgear ( GIS )
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温度对GIS绝缘子表面金属异物局部放电及闪络特性的影响 被引量:15
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作者 李星 许渊 +1 位作者 丁登伟 刘卫东 《中国电机工程学报》 EI CSCD 北大核心 2022年第1期406-414,共9页
表面金属异物是造成气体绝缘全封闭组合电器(gas-insulated switchgear,GIS)绝缘子故障失效的重要原因。运行中的绝缘子不仅承受强电场作用,还承受温度场的作用,研究电–热耦合下绝缘子表面金属异物的局部放电和闪络特性,具有重要的实... 表面金属异物是造成气体绝缘全封闭组合电器(gas-insulated switchgear,GIS)绝缘子故障失效的重要原因。运行中的绝缘子不仅承受强电场作用,还承受温度场的作用,研究电–热耦合下绝缘子表面金属异物的局部放电和闪络特性,具有重要的实际意义。鉴于此,该文建立GIS绝缘子电场和温度场耦合试验平台,开展不同温度作用下绝缘子表面金属异物缺陷的局部放电和闪络特性研究。结果发现,绝缘子表面最高温度从25℃升高至75℃时,绝缘子表面2.5cm长金属异物缺陷的局部放电起始电压降低约16%;平均放电量从0.55pC增加至1.45pC;最大放电量从9.1pC增加至11.5pC;放电频次也从不足200次/s增加至近400次/s。不同电压下,不同尺寸金属异物局部放电特性随温度变化的规律基本一致;而温度对绝缘子表面金属异物缺陷的工频闪络电压的影响不显著。研究结果有助于进一步认识实际运行中在电–热耦合作用下,温度变化对绝缘子表面金属异物缺陷的局部放电和闪络特性的影响规律。 展开更多
关键词 气体绝缘全封闭组合电器(gas-insulated switchgear GIS)绝缘子 温度 金属异物 局部放电 闪络
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地电波方法在金属封闭式开关柜放电故障诊断中的应用(英文) 被引量:11
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作者 任明 董明 +3 位作者 任重 彭华东 李洪杰 邱爱慈 《高电压技术》 EI CAS CSCD 北大核心 2011年第11期2672-2679,共8页
In order to solve the problems of TEV(transient earth voltage) utilization,such as single judgment criterion and low reliability of PD detection in HV switchboard,this paper discussed the method on how to make a bette... In order to solve the problems of TEV(transient earth voltage) utilization,such as single judgment criterion and low reliability of PD detection in HV switchboard,this paper discussed the method on how to make a better utilization of TEV in PD detection of metal-enclosed switchgears.Through discussing the relationship among the temporal phase,number of pulses and threshold of measuring and extracting the features corresponding to different typical defects,test results showed that the needle discharge distributed in 0°~90°and 200°~340°with low appearance probability above high measurement threshold;internal discharge distributed in 0°~90°and 270°~315°,and showed a similar decreasing trend under increasing of the threshold in the two regions;suspended discharge distributed in 0°~135°and 180°~315°where the PD in negative half periods decreased more seriously than those in positive half with increasing threshold.These results followed the doctrine of consistency with the conclusions that were obtained by using the traditional pulse current method.The possibility of using TEV method to make identification of PD defects has been proved to prepare for further research. 展开更多
关键词 metal-enclosed switchgear identification of defects transient earth voltage(TEV) PD detection
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六氟化硫组合开关设备在鲁新煤矿的应用 被引量:1
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作者 杨刚 贺国山 王登彬 《科技信息》 2010年第27期I0100-I0100,I0055,共2页
六氟化硫负荷开关是一种开断能力比较强的开关.普通的负荷开关采用的是空气灭弧,而六氟化硫负荷开关触头密封于六氟化硫气仓内,利用六氟化硫的高绝缘性能灭弧.。随着国民经济的发展需要,高压配电SF6的装置广泛应用于城区变电站、工业变... 六氟化硫负荷开关是一种开断能力比较强的开关.普通的负荷开关采用的是空气灭弧,而六氟化硫负荷开关触头密封于六氟化硫气仓内,利用六氟化硫的高绝缘性能灭弧.。随着国民经济的发展需要,高压配电SF6的装置广泛应用于城区变电站、工业变电站。做好SF6的安装、维护,能保证电力系统的安全运行。 展开更多
关键词 SF6气体 (gas-insulated switchgear)GIS全封闭组合电器 绝缘 电阻 管理
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