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Study on the Microsecond Pulse Homogeneous Dielectric Barrier Discharges in Atmospheric Air and Its Influencing Factors

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Plasma Science and Technology 2011年第6期13卷 676-681页

作者：方志雷枭蔡玲玲邱毓昌 edmund kuffel School of Automation and Electrical Engineering Nanjing University of Technology State Key Laboratory of Electrical Insulation and Power Equipment xi'an Jiaotong University Department of Electrical and Computer Engineering University of Manitoba

The homogeneous dielectric barrier discharge （DBD） in atmospheric air between two symmetric-columnar copper electrodes with epoxy plates as the dielectric barriers is generated using a us pulse high voltage power supply. The discharge characteristics are studied by measurement of its electrical discharge parameters and observation of its light emission phenom- ena, and the main discharge parameters of the homogenous DBD, such as discharge current and average discharge power, are calculated. Results show that the discharge generated is a homogeneous one with one larger single current pulse of about 2 #s duration appearing in each voltage pulse, and its light emission is radially homogeneous and covers the entire surface of the two elec- trodes. The influences of applied voltage amplitude, air gap distance and barrier thickness on the transition of discharge modes are studied. With the increase of air gap distance, the discharge will transit from homogeneous mode to filamentary mode. The higher the thickness of dielectric barriers, the larger the air gap distance for generating the homogeneous discharge mode. The average discharge power increases non-linearly with increasing applied voltage amplitude, and decreases non-linearly with the increase of air gap distance and barrier thickness. In order to generate stable and homogeneous DBD with high discharge power, thin barriers distance should be used, and higher applied voltage amplitude should be applied to small air gap.

关键词： dielectric barrier discharge (DBD) homogeneous mode filamentary mode discharge characteristics influencing factors

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基于介质阻挡大气压空气均匀放电的聚丙稀薄等离子体表面处理(英文)

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高电压技术 2011年第11期37卷 2746-2751页

作者：方志蔡玲玲雷枭邱毓昌 kuffel edmund School of Automation and Electrical Engineering Nanjing University of Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Department of Electrical and Computer Engineering University of ManitobaWinnipeg MB R3T 2N2Canada

The homogeneous dielectric barrier discharge(DBD) in atmospheric air is most favorable for polymer surface modification due to the low cost of operation and the ability of ambient on-line continuous uniform *** this paper,polypropylene(PP) films are treated using a homogeneous DBD plasma in atmospheric *** surface properties of PP films are studied using contact angle and surface energy measurement,scanning electron microscopy (SEM) and Fourier transformed infrared spectroscopy(FTIR),and the aging effect after treatment when the treated materials are exposed to open air is also studied,with the modification mechanism being *** is demonstrated that non-thermal plasmas generated by homogeneous DBD in atmospheric air is an effective way to enhance the surface properties of PP *** the plasma treatment,the surface of PP film is etched,and oxygen-containing polar groups are introduced into the *** two processes can induce a remarkable decrease in water contact angle and a remarkable increase in surface energy,and the surface properties of PP films are improved accordingly.

关键词： dielectric barrier discharge(DBD) homogeneous discharge surface modification polypropylene(PP)films hydrophilicity aging effect

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Improving Hydrophobicity of Glass Surface Using Dielectric Barrier Discharge Treatment in Atmospheric Air

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Plasma Science and Technology 2007年第5期9卷 582-586页

作者：方志邱毓昌王辉 E.kuffel State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an 710049China School of AutomationNanjing University of TechnologyNanjing 210009China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an 710049China Department of Electrical and Computer Engineering University of ManitobaWinnipeg R3T 2N2Canada

Non-thermal plasmas under atmospheric pressure are of great interest in industrial applications, especially in material surface treatment. In this paper, the treatment of a glass surface for improving hydrophobicity using the non-thermal plasma generated by dielectric barrier discharge （DBD） at atmospheric pressure in ambient air is conducted, and the surface properties of the glass before and after the DBD treatment are studied by using contact angle measurement, surface resistance measurement and wet flashover voltage tests. The effects of the applied voltage and time duration of DBD on the surface modification are studied, and the optimal conditions for the treatment are obtained. It is found that a layer of hydrophobic coating is formed on the glass surface after spraying a thin layer of silicone oil and undergoing the DBD treatment, and the improvement of hydrophobicity depends on DBD voltage and treating time. It seems that there exists an optimum treating time for a certain applied voltage of DBD during the surface treatment, The test results of thermal aging and chemical aging show that the hydrophobic layer has quite stable characteristics. The interaction mechanism between the DBD plasma and the glass surface is discussed. It is concluded that CHa and large molecule radicals can react with the radicals in the glass surface to replace OH, and the hydrophobicity of the glass surface is improved accordingly.

关键词： non-thermal plasma dielectric barrier discharge (DBD) surface treatment,hydrophobicity

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Insulator Surface Charge Measurement Using an Improved Capacitive Probe

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Plasma Science and Technology 2006年第5期8卷 565-568页

作者：汪沨邱毓昌李欣然 PFEIFFER W kuffel E State Key Lab for Electrical Insulation and Apparatus Xi'an Jiaotong University Xi'an 710049 China School of Electrical and Information Engineering Hunan University Changsha 410082 China State Key Lab for Electrical Insulation and Apparatus Xi'an Jiaotong University Xi'an 710049 China School of Electrical and Information Engineering Hunan University Changsha 410082 China Technische Universitat Darmstadt 64283 Darmstadt Germany Dept. of Electrical Engineering and Computer Science University of Manitoba Winnipeg Canada

A surface charge measuring system using the capacitive probe method is analysed. The present study shows that the measuring system cannot have a steady-state output and that the error resulting from the finite leakage resistance of the measuring system will be accumulated during the measuring process. Based on the theoretical analysis a new type probe with a low charge leakage and high resolution is designed. The surface charge accumulated on the Teflon insulator under a DC voltage is measured using this new probe and some phenomena of the surface charging are reported.

关键词： surface charge, insulator capacitive probe

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Key Techniques in Real Time Digital Simulation for Closed-loop Testing of HVDC Systems

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CSEE Journal of Power and Energy Systems 2017年第2期3卷 125-130页

作者： Yi Zhang Hui Ding Rick kuffel RTDS Technologies Inc. WinnipegManitobaCanada

This paper introduces several key techniques in realtime digital simulation for closed-loop testing of high voltage direct current(HVDC)systems,including line commutated converter(LCC)HVDC valve group models,modular multilevel converter(MMC)HVDC models,phase domain frequency dependent transmission line models,and switchable filter *** issues such as background,algorithms,implementations,applications,and validation of these models are *** techniques represent the most advanced technology in modelling HVDC systems on a real time *** models have been implemented on the RTDS Simulator,a comprehensive real time power system digital simulation tool.

关键词： HVDC real time simulation

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Calculation of Electron Swarm Parameters of SF_6/N_2 in a Uniform Field Using an Improved Monte Carlo Collision Simulation Method

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Plasma Science and Technology 2008年第1期10卷 39-42页

作者：汪沨 W.PFEIFFER N.KOUZICHINE 邱毓昌 E.kuffel 李肯立 School of Electrical and Information Engineering Hunan University Changsha 410082. China Technische Universitt Darmstadt 64283 Darmstadt Germany School of Electrical Engineering Xi'an Jiaotong University Xi'an 710049 China Department of Electrical Engineering and Computer Science University of Manitoba Winnipeg Canada School of Computor and Communication Huna University Changsha 410084 China

The electron swarm parameters of SF6/N2 are calculated in the present study using an improved Monte Carlo collision simulation method （MCS）. And some improved sampling techniques are also adopted. The simulation res... 详细信息

关键词： Monte Carlo collision simulation gas discharge swarm parameter

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THEORETICAL ANALYSIS OF CHARGE ACCUMULATION ON INSULATOR SURFACE UNDER IMPULSE VOLTAGE IN A GAS INSULATED SWITCHGEAR

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Academic Journal of Xi'an Jiaotong University 2002年第2期14卷 113-116,127页

作者：汪沨邱毓昌张乔根 kuffel E State Key Laboratory of Electrical Insulation for Power Equipment Xi'an Jiaotong University Department of Electrical Engineering University of Manitoba

Objective To investigate the process and mechanism of insulator surface charge accumulation under impulse voltage, a dynamic equation was established for describing the relationship between surface charge density and applied voltage. Results The established equation is more generalized in comparison with that given by other previous investigators. Constants A, B for typical electrodes used in the present equation are specified. The process and mechanism of surface charge accumulation under impulse voltage are studied and the factors that influence surface charge accumulation discussed. Conclusion The present theoretical studies help to explain why surface charging can be accomplished instantly under impulse voltage, and determine the factors influencing surface charge accumulation. The findings confirmed some surface charging phenomena observed in GIS by some previous investigators.

关键词： insulator surface charge impulse voltage

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吊索训练对高水平足球运动员平衡能力、踢球速度和躯干(肌肉力量)稳定性的改善

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北京体育大学学报 2007年第6期30卷 858-860页

作者： Stray Pedersen J. I Magnussen R kuffel E. Seiler S 周瑾(译) 不详北京体育大学北京100084

研究目的：通过量化的数据，确定以稳定性为核心的吊索训练计划（SET）对高水平足球运动员身体位置平衡能力、踢球速度和力量的作用。

关键词：足球运动员平衡能力肌肉力量训练计划稳定性速度踢球躯干

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电力系统实时数字仿真器RTDS

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电工技术杂志 2004年第7期26卷 49-52页

作者：叶林杨仁刚杨明皓 Rick kuffel 林华谘中国农业大学电力系 100083 RTDS Technologies Inc.

电力系统实时数字仿真器RTDS(RealTimeDigitalSimulators)是实时全数字电磁暂态电力系统模拟装置 ,采用与EMTP仿真程序相同的算法 ,但由于其具有很强的硬件计算能力 ,进行系统研究时速度要快得多。另外 ,RTDS仿真系统的频率特性包括了... 详细信息

电力系统实时数字仿真器RTDS(RealTimeDigitalSimulators)是实时全数字电磁暂态电力系统模拟装置 ,采用与EMTP仿真程序相同的算法 ,但由于其具有很强的硬件计算能力 ,进行系统研究时速度要快得多。另外 ,RTDS仿真系统的频率特性包括了一个很大的频率范围 (从直流到 4kHz) ,在此频率范围内 ,RTDS仿真系统是全面分析电力系统各种问题的理想工具。RTDS仿真系统可以用于电力系统分析研究、测试保护系统。

关键词：电力系统实时数字仿真器 RTDS 频率特性

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高电压工程

高电压工程

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作者： E.·库费尔(E. kuffel) M.·阿布杜勒(M. Abdullah)

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