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金属罐体对真空灭弧室内部电场分布的影响

高电压技术 2024年第2期50卷 570-578页

作者：李烁修士新贾申利罗海洋田志强陈军平西安交通大学电气工程学院西安710049 成都旭光电子股份有限公司成都610500

利用真空开断技术以及环保气体绝缘技术开发罐式真空断路器是高压真空断路器的一个重要发展方向。为此,建立了126 kV单断口真空灭弧室以及罐式断路器的电场仿真模型,分别从触头表面电场分布、触头间隙有效击穿面积以及内部电场分布对称... 详细信息

利用真空开断技术以及环保气体绝缘技术开发罐式真空断路器是高压真空断路器的一个重要发展方向。为此,建立了126 kV单断口真空灭弧室以及罐式断路器的电场仿真模型,分别从触头表面电场分布、触头间隙有效击穿面积以及内部电场分布对称性三个方面,探究了布置在金属罐中的真空灭弧室内部电场的变化。结果表明,金属罐体引起真空灭弧室内部动、静两侧的电场分布不对称,出现高电位侧电场强度增大,而低电位侧电场强度减小的情况。针对这一情况,建立等效电路模型,从电路层面分析。结果表明,对地杂散电容增大引起了主屏蔽罩的电位降低。进一步地,通过将主屏蔽罩电位设置为一系列的固定值,研究了主屏蔽罩电位对于真空灭弧室内部电场分布的影响。当控制主屏蔽罩电位相同时,布置在金属罐中的真空灭弧室与单个真空灭弧室相比,两者内部电场分布基本一致,这为罐式断路器中的真空灭弧室内部电场的优化提供了参考。

关键词：高压真空灭弧室气体绝缘开关设备电场仿真等效电路主屏蔽罩电位

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基于新型环保气体的断路器温升特性

工程科学与技术 2024年第5期56卷 86-97页

作者：赵莉华邬志云闫志强黄小龙宁文军贾申利四川大学电气工程学院四川成都610065 国家电网成都供电公司四川成都610000

由于SF_(6)断路器具有严重的温室效应,基于新型环保气体断路器的研究受到了广泛关注。现有关于新型环保气体C_(4)F_(7)N/CO_(2)混合气体的研究大多集中在灭弧、绝缘性能等方面,对其温升特性的研究不够深入,但是绝缘气体的温升特性对断... 详细信息

由于SF_(6)断路器具有严重的温室效应,基于新型环保气体断路器的研究受到了广泛关注。现有关于新型环保气体C_(4)F_(7)N/CO_(2)混合气体的研究大多集中在灭弧、绝缘性能等方面,对其温升特性的研究不够深入,但是绝缘气体的温升特性对断路器的载流能力设计和运行状态监测具有重要意义。为探究新型环保气体断路器的温升特性,本文基于40.5kV瓷柱式断路器样机搭建了温升实验平台,并建立了电磁-热-流多物理场耦合的仿真模型,对断路器温升特性开展研究。结果表明:断路器灭弧室内温升呈左右对称、上高下低的阶梯状分布,热量主要集中在导体和内部绝缘气体顶部;灭弧室内流场分布较为稳定,导体附近的气体由于受热产生了自然对流现象,气体流速随着温度的升高逐渐增大,最大流速出现在喷口位置;在一定条件下,瓷柱式断路器的导体回路、瓷套管外壳和喷口等典型测点处的温升均随着负荷电流的增大而增加,且喷口和导体处的温度上升速率远高于瓷套管外壳;基于不同气体的瓷柱式断路器温升场具有相似的分布规律,其中C_(4)F_(7)N/CO_(2)混合气体表现出良好的散热能力,且随着混合气体中C_(4)F_(7)N气体比例的增加,导体温升逐渐减小;各种气体环境下灭弧室内的流场分布也大致相似,气流速度与灭弧室温度和气体黏度密切相关。研究结果可为新型环保气体C_(4)F_(7)N在瓷柱式断路器中的应用提供理论依据,对新型环保绝缘气体在高压断路器温升方面替代SF_(6)具有重要意义。

关键词：温升特性 C_(4)F_(7)N/CO_(2)混合气体高压断路器有限元仿真

Study of post-arc residual plasma dissipation process of vacuum circuit breakers based on a 2D particle-in-cell model

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Plasma Science and Technology 2022年第4期24卷 124-132页

作者： Yongpeng MO Zongqian SHI shenli jia State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'an 710049People's Republic of China

In order to get an insight into residual plasma radial motion during the post-arc stage,a twodimensional(2D)cylindrical particle-in-cell(PIC)model is ***,influences of a virtual boundary condition on the residual plasma motion are *** purpose of validating this 2D cylindrical particle-in-cell model,a comparison between one-dimensional particle-in-cell model is also presented in this *** a study about the influences of the rising rate of transient recovery voltage on the residual plasma radial motion is presented on the basis of the 2D PIC model.

关键词： vacuum circuit breakers residual plasma dissipation particle-in-cell simulation

基于两电平电压源合成试验方法的混合式直流断路器开断过程仿真研究

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高压电器 2024年第5期60卷 76-83,91页

作者：阎对丰刘平冯伦张非凡修士新贾申利莫永鹏西安高压电器研究院股份有限公司西安710077 西安交通大学电气工程学院西安710049

直流断路器在研究过程中需要试验测试为设计提供参考,在其制造完成后则需要进行型式试验验证其可靠性。文中以15 kV电压等级的负压耦合型混合式直流断路器为例,对其短路电流开断过程进行仿真并提取了关键点电应力;阐述了两电平电压源合... 详细信息

直流断路器在研究过程中需要试验测试为设计提供参考,在其制造完成后则需要进行型式试验验证其可靠性。文中以15 kV电压等级的负压耦合型混合式直流断路器为例,对其短路电流开断过程进行仿真并提取了关键点电应力;阐述了两电平电压源合成试验方法,设计了适用于负压耦合型混合式直流断路器的两电平电压源合成试验回路,并优化了参数选取;将两电平回路下开断过程的仿真结果与开断过程所需的电应力进行对比,证明了两电平电压源合成试验方法可以提供开断过程所需的电压与电流应力,验证了两电平合成试验方法的等效性与可行性。文中研究结果可为高压直流断路器的研究、设计及试验提供参考。

关键词：混合式直流断路器等效性两电平电压源合成试验方法

Global model of plasma-activated water over long time scale:Pulsed discharge and afterglow

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High Voltage 2023年第2期8卷 326-339页

作者： Wenjun Ning Hao Shang Yiwei Ji Ronghui Li Lihua Zhao Xiaolong Huang shenli jia College of Electrical Engineering Sichuan UniversityChengduChina School of Electrical Engineering Xi'an Jiaotong UniversityXi'anChina

Plasma-activated water(PAW)has been utilised in various application fields,and a deep understanding on the plasma chemistry is the foundation of application-orientated *** this paper,a global model is built to study the chemical properties of PAW produced by a dielectric barrier discharge that is powered by nanosecond voltage *** applied voltage is firstly repeated with 10 kHz frequency for 100 s,and then shut down for 200 s afterglow,providing a long-term evolution regarding the production and consumption of some typical reactive oxygen/nitrogen species(RONS)in *** calculated results agree principally with experimental measurements from *** the pulsed discharge,the water gradually acidises,and the long-lived species accumulate;while in the afterglow,most of the aqueous RONS decay rapidly,except for O_(3aq),NO_(3aq)^(−),H_(2)O_(2aq)and N_(2)O_(aq),which might be the main sources to sustain long-term ***,the effects of applied voltage and gap distance on RONS are *** analyses from Pearson correlation coefficient indicate that gaseous RONS are more sensitive to the gap distance,while the aqueous ones are more sensitive to the voltage amplitude,suggesting the possibility to independently regulating the gaseous and aqueous chemistry.

关键词： gaseous Global providing

Analysis of influence of a novel inductive fault current limiter on the circuit breaker in 500 kV power system

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High Voltage 2021年第6期6卷 997-1008页

作者： Qiang Tang shenli jia Yanzhe Zhang Shixin Xiu Wenxiong Mo Yong Wang Haibo Su Department of Electrical Engineering Xi'an Jiaotong UniversityChina Test and Research Institute of Guangzhou Power Supply Company Ltd. GuangzhouChina

A contribution to the engineering application of a proposed 500 kV fault current limiter(FCL)is presented.A new type of FCL composed of a highly coupled split reactor(HCSR)and fast switches is *** the circuit breaker(CB)in series with the FCL in the 500 kV power system interrupts the limited fault current,the rate of rise of the recovery voltage(RRRV)reaches a value much higher than the rated *** on a simplified equivalent single‐phase circuit,the influence of the new FCL on the interruption procedure of the CB is simulated and *** simulation results show that the high RRRV is caused by high‐frequency resonant oscillations between the HCSR and its parasite *** indicates that when the reactance of the FCL is close to the short circuit reactance of the system,the RRRV will reach the highest *** solve this issue,we proposed installing a shunt capacitor with the *** results showed that the RRRVunder all fault modes could be restrained to below the rated value by introducing a certain shunt capacitor.

关键词： fault inductive power

Interruption Characteristics of High-speed Switches in 500 kV Fault Current Limiter with High Coupled Split Reactance

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1577-1584页

作者： Yanzhe Zhang Shixin Xiu Qiang Tang shenli jia Bo Chu Wenxiong Mo Yong Wang Haibo Su State Key Laboratory of Electrical Insulation and Power Equipment the School of Electrical EngineeringXi'an Jiaotong UniversityXi'an 710049China. Test and Research Institute of Guangzhou Power Supply Company Ltd. Guangzhou 510410China.

A 500 kV high-voltage AC fault current limiter(FCL)based on a high coupled split reactor(HCSR)is pro-posed by the National key R&D project *** impedance under normal conditions and high impedance under short-circuit conditions are accomplished by the cooperation of HCSR and high-speed ***-speed switches play an important role in current limiting processes,thus interruption characteristics of the high-speed switch in the 500 kV FCL are studied in this *** simulation model of the FCL and the external equivalent power grid are *** short-circuit current and recovery voltage characteristics of the high-speed switch in FCL are *** results show that maximum DC component of the short-circuit current of the high-speed switch reaches 91%,the maximum peak value is 118 kA,and the longest arcing time is 14.8 *** is a discontinuity in the curve of the short-circuit current peak and arcing time as a function of the short-circuit occurrence time;the peak recovery voltage of a single break of the high-speed switch has a maximum value of 87.5 kV under a three-phase ungrounded short-circuit condition,and the rate of rise of recovery voltage is o.22 kV/*** recovery voltage peak shows a period change with the short-circuit occurrence time,and the period is 10 *** effects of the shunt capacitor value and short-circuit ground resistance on the recovery voltage of high-speed switching are also *** research can be used for reference by R&D personnel and *** Terms-Fault current limiter(FCL),high coupled split reactor(HCSR),high-speed switch,interruption characteristics,short circuit current.

关键词： Fault current limiter(FCL) high coupled split reactor(HCSR) high-speed switch interruption characteristics short circuit current.

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环保型高压真空开关电流开断基础

广东电力 2024年第9期37卷 88-101页

作者：贾申利乐小熙黄小龙申赛康苏海博刘俊翔王勇四川大学电气工程学院四川成都610065 广东电网有限责任公司广州供电局电力科学研究院广东广州510700

针对“双碳”战略下绿色环保开关设备的发展需求,“真空灭弧+洁净空气”绝缘方案对于开关设备的SF_(6)替代目标而言是一种彻底的解决方案。对于真空开关向更高电压等级发展面临的关键问题进行全面分析,重点阐述真空开关在高电压大电流... 详细信息

针对“双碳”战略下绿色环保开关设备的发展需求,“真空灭弧+洁净空气”绝缘方案对于开关设备的SF_(6)替代目标而言是一种彻底的解决方案。对于真空开关向更高电压等级发展面临的关键问题进行全面分析,重点阐述真空开关在高电压大电流下的开断问题。基于真空电弧的基础理论,将弧后介质恢复过程分为残余等离子体消散阶段、金属蒸气恢复阶段、金属液滴与熔融触头表面恢复阶段,并对比分析3个阶段下真空灭弧室电极间隙的恢复特性。针对环保型真空开关向更高电压等级发展的需求,总结归纳真空灭弧室在绝缘设计、电弧控制、X射线辐射、载流发热方面的关键问题,阐述洁净空气绝缘在实际应用过程中的难点和解决措施,旨在为252 kV及以上电压等级真空开关的研究与设计提供参考。最后,讨论高压真空开关的研究现状和发展趋势。

关键词：真空开关电流开断真空电弧真空灭弧室弧后介质恢复过程真空灭弧室绝缘

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Characteristics of Laser Produced Plasmas Obtained by Fast ICCD Photography, Schlieren Photography and Optical Emission Spectroscopy

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高电压技术 2013年第9期39卷 2173-2179页

作者： WEI Wenfu WU jian LI Xingwen jia shenli QIU Aici State Key Laboratory of Electrical Insulation and Power Equipment Xi' an Jiaotong University Xi'an 710049 China

Pulsed laser produced plasmas(LPP)are important for industrial applications and fundamental researches,and their complex,multi-physical and cross-chemical processes need to be investigated more *** this work,images of the luminous plasma,the spatial density distribution,and the plasma parameters are experimentally investigated by using fast ICCD photography,schlieren photography,and optical emission *** are produced by a 1 064 nm,15 ns Nd:YAG *** expanding and splitting phenomena are observed in vacuum(at the pressure of about 1×10 3Pa)and air(at the pressure of 20 Pa)using fast photography,***,shock waves formed in the atmospheric laser produced plasma are visualized by schlieren *** formation of shock waves is interpreted with the Sedov-Taylor theory,and an averaged expansion velocity about 375 m/s of the shock waves is estimated during 200～1 000 *** air is found to have significant confinement effects on the plasma expansions compared to that in vacuum or low pressure *** on the optical emission spectroscopy,after 1 000 ns,at 0.6 mm above the target,the plasma temperature is about 7 800 K and the electron number density is approximately 0.64×1016cm-3.

关键词：等离子体密度发射光谱仪纹影摄影激光产生 ICCD 生产特性等离子体参数