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Analysis of sf6 decomposed products by fibre-enhanced Raman spectroscopy for gas-insulated switchgear diagnosis

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High Voltage 2024年第1期9卷 206-216页

作者： Jianxin Wang Weigen Chen Pinyi Wang Fu Wan Zhixian Zhang Shoufei Gao Yingying Wang School of Electrical Engineering Chongqing UniversityChongqingChina State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqingChina Institute of Photonics Technology Jinan UniversityGuangzhouChina

Sulphur hexafluoride(sf6)decomposed products analysis is highly critical in the earlystage fault diagnosis of gas-insulated switchgear(GIS).Spectrum technology outperforms traditional methods on non-invasiveness,no sample preparation,and no ***,the authors present an improved fibre-enhanced Raman spectroscopy(FERS)as a comprehensive analytical tool to detect a suite of sf_(6)decomposed products(SO_(2)F_(2),SOF_(2),SO_(2),H_(2)S,CF_(4),OCS,CO_(2),and CO).The FERS approach is combined with two iris diaphragms for spatial filtering and a rear-end reflector for additional Raman signal *** of detection down to 1×10^(−6)–8×10^(−6)are achieved for different sf6 decompositions,and quantification of an undefined multigas,sampled from an 800 kV GIS in service,is realised utilising sf6 as the internal standard gas and with a maximum error of 5.5%.The GIS is diagnosed according to the results and confirmed by an on-site *** authors foresee that this technique will provide a route for trace gas analysis in the power industry.

关键词： sf6 diagnosis fibre

Editorial:The development of eco-friendly insulating gases and sf6-free equipment for‘net-zero’

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High Voltage 2024年第1期9卷 1-1页

作者： Song Xiao Yi Li Ju Tang Xiaoxing Zhang State Key Laboratory of Power Grid Environmental Protection School of Electrical Engineering and AutomationWuhan UniversityWuhanHubeiChina Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment School of Electrical and Electronic EngineeringHubei University of TechnologyWuhanHubeiChina

Developing low-carbon gas insulated transmission and distribution equipment is essential to achieve the‘carbon peak,carbon neutralisation’or‘net-zero’in the power *** have carried out various research on the eco-friendly insulating gas(such as C4F7N,C5F10O)and next-generation sf6-free equipment to gradually reduce the utilisation of strong greenhouse gas sf6.

关键词： sf6 carbon free

GIS基于泛在物联网无线高精度sf6自动补气技术探讨

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中国设备工程 2024年第17期 6-8页

作者：刁群新源智储能源发展(北京)有限公司北京102400

通过对GIS设备和sf6断路器无线高精度自动补气方式的研发和应用,解决了运行状态下的安全可靠补气,降低了人员的操作风险,保证设备安全运行。同时该装置通过物联网将微水、局放、温度等参数监测系统与DCS形成网络链,可以远程监测和控制... 详细信息

通过对GIS设备和sf6断路器无线高精度自动补气方式的研发和应用,解决了运行状态下的安全可靠补气,降低了人员的操作风险,保证设备安全运行。同时该装置通过物联网将微水、局放、温度等参数监测系统与DCS形成网络链,可以远程监测和控制补气过程。

关键词： GIS sf6 自动补气物联网研发

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Detection of decomposition products of sf6/air gas mixture by electron attachment mass spectrometry

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High Voltage 2022年第3期7卷 536-544页

作者： Huan Yuan Xiaonan Wang Aijun Yang Dingxin Liu Xiaohua Wang Mingzhe Rong State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina

Sulphur hexafluoride(sf_(6))is widely used in gas insulation,and its decomposition products can be used to diagnose potential insulation *** and accurate detection of decomposition products can help to understand equipment-operating conditions in *** this study,the decomposition products of sf_(6)/air gas mixtures under different pulsed discharge voltages were *** was found that the main products were SOF_(2),SO_(2)F_(2),SO_(2),CF_(4)and SOF_(4),and the yields of SOF_(2),SO_(2)F_(2),SO_(2)and SOF_(4)increased with the number of discharge *** productive rate of SOF_(2),SO_(2)and SOF_(4)were positively correlated with the discharge voltage,and when the discharge voltage increased from 5 to 15 kV,their yields after 50,000 discharges increased by 49%,120%and 1100%,*** productive rate of SOF_(2)and SO_(2)were positively correlated with the proportion of air in the gas mixtures while that of SOF_(4)was *** the proportion of air increases from 0%to 90%,their yields after 50,000 discharges became 270%,3169%and 10%of the originals,*** addition,the productive rate of SO_(2)F_(2)was not affected by discharge voltage and the proportion of air in the gas ***_(2)F_(2),SOF_(2),SOF_(4)and SO_(2)can be used as the basis for judging the discharge failures and the discharge degree of power equipment.

关键词： insulation decomposition sf6

交流与负极性雷电冲击叠加电压下sf6中自由金属颗粒局部放电激发特性

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高电压技术 2022年第8期48卷 3305-3315页

作者：树婷杨玥坪郭若琛吴玖汕张轩瑞李军浩西安交通大学电气工程学院西安710049

气体绝缘组合电器(gas insulated switchgear,GIS)在运行中常常会遭受雷电过电压侵袭,此时其中的自由金属颗粒缺陷会使得sf设备绝缘性能急剧降低,威胁设备的运行安全。基于冲击叠加相位可调的交流与冲击叠加试验系统,采用脉冲电流法试... 详细信息

气体绝缘组合电器(gas insulated switchgear,GIS)在运行中常常会遭受雷电过电压侵袭,此时其中的自由金属颗粒缺陷会使得sf设备绝缘性能急剧降低,威胁设备的运行安全。基于冲击叠加相位可调的交流与冲击叠加试验系统,采用脉冲电流法试验研究了冲击叠加相位、金属颗粒尺寸、金属颗粒数量对交流与雷电冲击叠加电压下sf中自由金属颗粒局部放电激发特性的影响。试验结果表明,冲击叠加相位、金属颗粒尺寸和数量对局部放电激发特性影响显著。负极性雷电冲击叠加在交流电压负半周后,可激发颗粒后续的交流局部放电,且冲击叠加在270°相位所激发的放电最为剧烈;随着颗粒尺寸增大,冲击下金属颗粒局部放电更难激发,但激发后局放更为剧烈;随着颗粒数量增加,冲击下金属颗粒局部放电更容易激发,且放电更为活跃;并从空间电荷角度对局部放电的激发和发展机理进行了解释。该研究工作对于深入理解与实际工况更为契合的叠加电压下sf中自由金属颗粒局部放电特性具有重要的理论和工程意义。

关键词：交流与雷电冲击叠加电压气体绝缘组合电器 sf6 自由金属颗粒缺陷局部放电

Plasma-assisted abatement of sf6 in a packed bed plasma reactor: understanding the effect of gas composition

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Plasma Science and Technology 2020年第5期22卷 95-104页

作者： Xiaoxing ZHANG Yuan TIAN Zhaolun CUI Ju TANG School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072People's Republic of China School of Electrical and Electronic Engineering Hubei University of TechnologyWuhan 430068People's Republic of China

The potential impact of sf6 as a potent greenhouse gas on the global climate is highly *** paper studies the effect of H2O concentration,sf6 inlet concentration and pre-heating temperature on sf6 abatement in a packed bed plasma reactor in terms of the removal efficiency and products *** results showed that the best performance in sf6 abatement was obtained at 1%H2O and 100°C with 98.7%destruction and remove efficiency(DRE)at 2%*** energy yields was obtained under higher sf6 inlet ***,the existence of water vapor weakened the micro-discharge and provided H and OH radicals for this system,which showed a close relationship to removal efficiency and products *** four sulfur-containing products,SO2 F2 was more stable than SOF2,SOF4 and ***,SOF4 and SO2 were very susceptible to the above *** article provides a better understanding of sf6 abatement in a view of both scientific and engineering.

关键词： sf6 PBR plasma gas composition

Dynamic dielectric recovery performance of serial vacuum and sf6 gaps in HVDC interruption and its regulation method

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Plasma Science and Technology 2019年第7期21卷 83-89页

作者： Xian CHENG Peiyuan YANG Guowei GE Qiliang WU Wei XIE School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China Henan Engineering Research Center of Power Transmission&Distribution Equipment and Electrical Insulation Zhengzhou 450001People’s Republic of China Electric Power Research Institute State Grid Henan Electric Power CompanyZhengzhou 450001People’s Republic of China

Vacuum gaps have rapid dynamic dielectric recovery speed while sf6 gaps have high insulation strength. The series-connected vacuum and sf6 gaps are used as the main switch(MS), which combines their advantages. The work aims to verify the feasibility of serial vacuum and sf6 gaps in mechanical HVDC interruption. The test circuit of the dynamic dielectric recovery performance(DDRP) is set up. The DDRP is tested under free recovery condition by the high voltage pulse source. The DDRP of the vacuum circuit breaker(VCB) and sf6 gas circuit breaker(GCB) in DC interruption with active current injection is analyzed and compared. The test results indicate that the dielectric recovery duration of the VCB is below 30 μs while that of the GCB is above 100 μs. In order to achieve the cooperation between the VCB and GCB, a novel hybrid HVDC circuit breaker(CB) based on series-connected vacuum and sf6 gaps is proposed. The ‘voltage-zero’ duration is created by introducing the follow current loop and there more recovery time for the dielectric recovery of the MS. The voltage distribution is controlled by the voltage dividing method so that the VCB undertakes the initial transient recovery voltage(TRV) and the later TRV is took by the GCB. The theoretical synergy characteristic of the novel HVDC CB is obtained. The paper supplies a new method to improve the custom mechanical HVDC CB, which is useful to achieve the HVDC CB with less serial breaks.

关键词： dielectric recovery performance vacuum interrupters sf6 interrupters

金属突出物电极结构下sf6气体临界击穿场强计算研究

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高压电器 2023年第10期59卷 206-214页

作者：赵崇智罗颜宋浩永王邸博王炜卓然黄慧红广东电网有限责任公司广州供电局广州510000 南方电网科学研究院有限责任公司广州510663 南方电网先进电工材料与装备基础联合实验室广州510663

sf6气体在电力绝缘设备中的应用已经非常广泛,研究sf6气体放电击穿特性对于计算金属突出物电极结构下sf6气体临界击穿场强具有重要意义。文中针对sf6气体在金属突出物电极结构下的放电击穿过程开展了详细的理论研究与计算分析。首先,基... 详细信息

sf6气体在电力绝缘设备中的应用已经非常广泛,研究sf6气体放电击穿特性对于计算金属突出物电极结构下sf6气体临界击穿场强具有重要意义。文中针对sf6气体在金属突出物电极结构下的放电击穿过程开展了详细的理论研究与计算分析。首先,基于已有的sf6气体击穿过程进行理论总结并加以完善;然后,引入阶段先导发展模型,针对稍不均匀电场条件下sf6气体放电击穿过程进行建模。将放电击穿分为3个主要过程,首电子产生阶段、流注初始阶段及先导发展至击穿阶段;最后,结合气体物性参数建立金属突出物电极结构下sf6气体折合临界击穿场强计算综合模型,计算得到sf6气体在金属突出物电极结构下临界击穿场强。研究表明:相同压强情况下,交流电压下的临界击穿场强要比雷电冲击电压下的折合临界击穿场强低。雷电冲击电压下临界击穿场强极性随电极结构和压强条件的变化而改变。并且,由于在曲率较大处的电极处局部放电产生空间电荷的影响,随着压强的增大和突出物尖端的加长,正极性雷电冲击电压下的临界击穿场强趋向施加交流电压下的临界击穿场强。

关键词： sf6 气体绝缘开关临界击穿场强流注先导

正极性电场中sf6气体对导电微粒带电特性的影响

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北京交通大学学报 2022年第2期46卷 160-166页

作者：马御棠刘刚耿浩廖民传冯瑞发南方电网云南电网有限责任公司电力科学研究院昆明650217 南方电网科学研究院广州510663 特高压电力技术与新型电工装备基础国家工程研究中心昆明651701

针对气体绝缘金属封闭开关设备(Gas Insulated Suitchgear,GIS)中导电微粒运动容易引发电极间击穿和绝缘沿面闪络等问题,开展了正极性电场中sf6气体对导电微粒带电特性的影响研究.试验得到了空气、sf6环境导电微粒的运动轨迹,根据观测... 详细信息

针对气体绝缘金属封闭开关设备(Gas Insulated Suitchgear,GIS)中导电微粒运动容易引发电极间击穿和绝缘沿面闪络等问题,开展了正极性电场中sf6气体对导电微粒带电特性的影响研究.试验得到了空气、sf6环境导电微粒的运动轨迹,根据观测结果分析微粒的速度、受力提出微粒带电量估算方法并计算启举场强下空气、sf6气体环境微粒的带电量.结果表明,正极性条件下带电微粒启举场强明显高于真空及空气环境,且启举场强随sf6气体压力的升高而增大.电场强度相同时,sf6条件下微粒带电量小于空气环境,约为空气条件下的0.789倍.电极表面导电微粒附近电场集中及sf6电负特性是影响微粒初始带电量的原因.研究拟为GIS微粒抑制方法及针对微粒抑制的耐压试验方法的制定提供数据支持.

关键词： GIL 导电微粒 sf6 启举场强绝缘子间隙击穿沿面闪络高压输电

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