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2011 1st International Conference on Electric Power Equipment - Switching Technology最新文献

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Detection of micro-Te segregation at the interface of Cu/Cr phases in Cu-30Cr-0.01Te alloy contact material by XPS XPS检测Cu- 30cr -0.01 te合金接触材料Cu/Cr相界面微量te偏析
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122972
Jinglin Xie, B. Miao
The composition and bonding energy of Te segregation in Cu-30Cr-0.01Te alloy contact material were investigated by X-ray photoelectron spectroscopy. Photoelectron patterns from the main chemical elements of Cu, Cr and Te on the fresh fracture surface of Cu-30Cr-0.01Te alloy contact material show that Te atoms highly segregated at the interface of Cu/Cr phases, thus the structure and property of the interface between Cu/Cr phases were changed and led to reduce the tensile strength and increase anti-welding property of the contact material.
采用x射线光电子能谱研究了Cu-30Cr-0.01Te合金接触材料中Te偏析的组成和键能。Cu- 30cr -0.01Te合金接触材料新鲜断口表面主要化学元素Cu、Cr和Te的光电子图表明,Te原子在Cu/Cr相界面处高度偏析,从而改变了Cu/Cr相界面的结构和性能,导致接触材料的抗拉强度降低,抗焊接性能提高。
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引用次数: 3
The research of a new arc suppression coil 一种新型消弧线圈的研究
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122998
L. Hua, Yang Likui, Li Lingling, Huang Shanshan, He Pengju
According to the neutral point of arc extinction coil grounding system can't very well compensated the permanent earthing failure of current shortcomings, a kind of new arc extinction coil was designed. When the power failed, the microcomputer controled the fine-tuning of the arc extinction coil and paralleled into the coarse arc suppression coil, Adjusting the fine-tuning arc suppression coil, and made the whole arc extinction coil all work in the full compensation state, thus effectively extinguished the electric arc. Through the matlab Simulations, We tested the maximum measurement error of the detuning degree is 0.64%, the earth capacitance and capacitance current of the maximum error is no more than 1%, and it can effectively extinguish more than 85% of the instantaneous electric arc.
针对消弧线圈中性点接地系统不能很好地补偿电流永久接地失效的缺点,设计了一种新型消弧线圈。当停电时,微机控制消弧线圈的微调并并联进粗消弧线圈,调节微调消弧线圈,使整个消弧线圈全部工作在全补偿状态,从而有效地熄灭了电弧。通过matlab仿真,我们测试了失谐度的最大测量误差为0.64%,对地电容和电容电流的最大误差不大于1%,并且能有效熄灭85%以上的瞬时电弧。
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引用次数: 1
A study of the insulation property for development of eco-friendly GIS under SF6/N2 mixtures SF6/N2混合材料开发生态GIS的保温性能研究
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122961
D. Jeong, S. Woo, K. Seo, J.H. Kim
Gas insulated systems are widely used in the electric power industry for transmission and distribution of electrical energy. When SF6 was first discovered, the potential application was only considered for insulation because of good dielectric properties. But the widespread use of SF6 gas by electric power and other industries has led to increased concentrations of SF6 gas in the atmosphere. This causes concern as to possible effects on global warming because SF6 is a potent greenhouse gas. This paper presents the dielectric strength and insulating property on SF6/N2 mixtures to make design criteria for developing the GIS. Two types of mixed gases (50%SF6_50%N2, 20%SF6_80%N2) were applied. We performed tests for electrode gap, contamination of particles, Triple junction for the spacer and earthing switch and disconnecting switch sections of GIS model. Test gas pressure is from 0.3 to 0.7 MPa. To find the 50% Breakdown voltage, the number of breakdown was performed 15 times and all test results were applied to analyze the normal distribution. The study was conducted to develop environment-friendly GIS under SF6/N2.
气体绝缘系统在电力工业中广泛应用于电能的传输和分配。当SF6首次被发现时,由于其良好的介电性能,仅考虑其潜在的应用于绝缘。但是电力和其他行业对SF6气体的广泛使用导致了大气中SF6气体浓度的增加。这引起了人们对全球变暖可能产生的影响的关注,因为SF6是一种强效的温室气体。本文介绍了SF6/N2混合料的介电强度和绝缘性能,为开发GIS提供了设计依据。采用两种混合气体(50%SF6_50%N2, 20%SF6_80%N2)。我们对电极间隙、颗粒污染、间隔器的三重结以及GIS模型的接地开关和断开开关部分进行了测试。测试气体压力为0.3 ~ 0.7 MPa。为了得到50%击穿电压,进行了15次击穿试验,并将所有试验结果应用于正态分布分析。本研究是在SF6/N2环境下发展环境友好型地理信息系统。
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引用次数: 5
The application of fault current limiter at Icheon substation in Korea 故障限流器在韩国利川变电站的应用
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123008
M. J. Kim, Gyeong-Ho Lee, Seung-Hyun Bang, H. Park, Wonjoon Choe, J. Sim, Seog-Won Lee, Young-geun Kim, Hye-Rim Kim
A 25.8 kV / 630 A hybrid superconducting fault current limiter (SFCL) has successfully designed, tested and finally installed in a real power grid at Icheon substation for the purpose of pre-commercial demonstrations. The hybrid SFCL is composed of high temperature superconductor (HTS), fast switch (FS), and current limiting reactor (CLR) module. In this hybrid SFCL, the HTS module plays a role in sensing fault current and letting the direction of an electric current turn to the FS path. A reduction in amplitude of fault current is done by CLR module. The combination of HTS and FS module made of conventional electrical equipment enables the volume and the cost of total system to be reduced significantly, and the operating reliability to be improved. A short circuit test (12.5 kArms) was conducted and we were able to verify reliable fault current limiting capability of hybrid SFCL. After passing all the required tests, including the impedance test and the electrical insulation test, the hybrid SFCL was installed at Icheon substation in 2010 and now it is waiting for connection to Jang-pyong distribution line (D/L). Recently, a stable operation of HTS cryocooling system was clearly proven through applying load current modeled on the worst fluctuating load among real daily load profiles of Jang-pyong D/L.
一种25.8 kV / 630 A混合型超导故障限流器(SFCL)已成功设计、测试并最终安装在利川变电站的实际电网中,用于商业前演示。混合SFCL由高温超导体(HTS)、快速开关(FS)和限流电抗器(CLR)模块组成。在这种混合SFCL中,HTS模块的作用是检测故障电流,并使电流的方向转向FS路径。通过CLR模块降低故障电流的幅值。采用传统电气设备制作的HTS与FS模块相结合,大大降低了整个系统的体积和成本,提高了系统的运行可靠性。进行了短路试验(12.5 kArms),验证了混合式SFCL的可靠限流能力。混合SFCL在通过阻抗测试和电气绝缘测试等所有必要测试后,于2010年在利川变电站安装,目前正在等待连接到长坪配电线路(D/L)。近年来,通过在张坪电厂实际日负荷曲线中以最坏波动负荷为模型,应用负荷电流,明确证明了高温低温制冷系统的稳定运行。
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引用次数: 9
Innovative thermoplastic pole design sets new reliability and environmental standards for vacuum breaker technology 创新的热塑性极设计为真空断路器技术设定了新的可靠性和环境标准
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123047
D. Gentsch, A. Klaska, Zhanwei Tu, Yurong Lv
ABB has over 10 years of experience in the use of embedded pole technology based on epoxy insulation in medium-voltage circuit breakers with vacuum interrupters. The next significant step in this technology is the development of embedded poles that use a thermoplastic material.
ABB在使用基于环氧绝缘的嵌入式极杆技术在带真空断路器的中压断路器中拥有超过10年的经验。这项技术的下一个重要步骤是开发使用热塑性材料的嵌入式极点。
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引用次数: 1
Experimental study of vacuum switch applied in pulse source system 真空开关在脉冲源系统中的实验研究
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122910
Yingbiao Shao, X. Yao, Jingliang Chen, Xiaoqing Xu
The high power pulse source driving electromagnetic rail gun requires some characteristics of the core device switch, such as strong charge transfer ability and standing high peak pulse current. Meanwhile, when the total driving current is got by adding several pulse currents generated by different modules respectively, the source requires short jitter of switch. The test platform is built for studying static and dynamic characteristics of triggered vacuum switch (TVS). Under conditions that peak value of triggering pulse is 15 kV and gap distance is 1 mm, our experiment results show that: the average self-breakdown voltage is 15.2 kV, minimum operating voltage is 130 V, and the operating voltage range is from 0.7% to 90%. Meanwhile, the biggest discharging delay time is 400 ns and the jitter is 15.2 ns. We also have studied the switch in the high-power pulse source based on network topology, and our experiment results show that: the vacuum switch is able to stand 196 kA peak pulse current and transfer charge up to 194.8 C each time. It is suggested by our experiment results that: the switch has wide operating voltage scope and strong charge transfer ability, and could stand high peak current, furthermore the switches satisfy the requirement of the synchronization of multi-module.
大功率脉冲源驱动电磁导轨枪需要核心器件开关具有强电荷转移能力和恒峰值脉冲电流等特性。同时,当将不同模块分别产生的多个脉冲电流相加得到总驱动电流时,源要求开关的抖动短。为研究触发式真空开关(TVS)的静态和动态特性,搭建了测试平台。在触发脉冲峰值为15 kV、间隙距离为1 mm的条件下,实验结果表明:平均自击穿电压为15.2 kV,最小工作电压为130 V,工作电压范围为0.7% ~ 90%。最大放电延迟时间为400 ns,最大抖动为15.2 ns。我们还对基于网络拓扑的大功率脉冲源开关进行了研究,实验结果表明:真空开关每次能够承受196ka的峰值脉冲电流,传输电荷高达194.8 C。实验结果表明:该开关工作电压范围宽,电荷转移能力强,能承受较高的峰值电流,满足多模块同步的要求。
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引用次数: 0
High-power converters with high switching frequency operation using SiC-PiN diodes and Si-IEGTs 使用SiC-PiN二极管和si - iets的高开关频率操作的大功率变换器
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6123020
K. Takao, Yasunori Tanaka, Kyungmin Sung, K. Wada, T. Shinohe, T. Kanai, H. Ohashi
High-frequency switching operations are required in medium-voltage power converters to realize compact power converter systems. High-voltage hybrid pair modules using SiC-PiN diodes and Si-IEGT are expected to increase the switching frequency. In this work, 4.5 kV–400 A SiC-PiN diode and Si-IEGT hybrid pair modules have been developed. Hard driving is applied to the hybrid pair module for low switching losses and stable series voltage balance between two series-connected modules. Operation tests of developed hybrid pair modules with the switching frequency of 4 kHz have been carried out in a 1 MVA class prototype power converter.
为实现紧凑型电源变换器系统,需要在中压变换器中进行高频开关操作。使用SiC-PiN二极管和Si-IEGT的高压混合对模块有望提高开关频率。在这项工作中,开发了4.5 kv - 400a SiC-PiN二极管和Si-IEGT混合对模块。混合对模块采用硬盘驱动,以实现低开关损耗和两个串联模块之间稳定的串联电压平衡。研制的开关频率为4 kHz的混合对模块在1 MVA级样机电源变换器上进行了运行试验。
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引用次数: 4
A new method to detect the short circuit current in DC supply system based on the flexible Rogowski coil 基于柔性Rogowski线圈的直流供电系统短路电流检测新方法
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122978
Yan Wang, Xiaoshe Zhai, Zhengxiang Song, Yingsan Geng
The short circuit current in DC (Direct Current) supply system will rise to a risk value within a few milliseconds. The current limiter must detect this fault on microsecond level to restrict the amplitude of short circuit current more effectively. For the existing method, the shunt is always employed for such fault detection, where the time to detect the fault current is relative long and hard for the rapid detection. In this paper, a novel method based on the flexible Rogowski coil is proposed, where the differential signal and the integral signal of the Rogowski coil are combined to perform the relay protection function. The design method of the coil, the relative experiments and the simulation result of the relay protection system are all discussed in sequence. Firstly, the equivalent circuit of the Rogowski coil is established, in which the distributed parameters of the coil are calculated with the Finite Element Method. Secondly, the frequency response of the coil is calculated and validated experimentally. The parameters of the Rogowski coil can be adjusted and designed according to the simulation result. Finally, the simulation of the relay protection system is performed, which shows that the demand of short current protection in ship DC distribution system can be satisfied and the method proposed in this paper is verified.
直流供电系统的短路电流在几毫秒内就会上升到一个危险值。限流器必须在微秒级检测到这种故障,才能更有效地限制短路电流的幅度。现有的故障检测方法多采用并联装置,检测故障电流的时间较长,难以实现快速检测。本文提出了一种基于柔性Rogowski线圈的继电保护新方法,将Rogowski线圈的差分信号和积分信号结合起来实现继电保护功能。依次讨论了线圈的设计方法、相关实验和继电保护系统的仿真结果。首先,建立了Rogowski线圈的等效电路,并用有限元法计算了线圈的分布参数;其次,对线圈的频率响应进行了计算和实验验证。Rogowski线圈的参数可以根据仿真结果进行调整和设计。最后,对该继电保护系统进行了仿真,结果表明,该继电保护系统可以满足船舶直流配电系统短电流保护的要求,并验证了本文提出的方法。
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引用次数: 7
The application of multistage invariable permanent current source in magnetic force adjustment 多级恒恒电流源在磁力调节中的应用
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122999
Mao Gangyuan, Wu Mei, Liu Huikang
Traditional magnetic crane in the actual operation due to the saturation of the electromagnet coil excitation is prone to produce excessive current and causes the waste of energy. In the demagnetization stage, Stored energy through the electromagnet coil braking resistance heat release, no feedback to the power grid, has also caused a lot of waste. Another electromagnet is a big inductive load. When DC contactors are connected or disconnected, inductance back electromotive force is very large, and very prone to generate arc light, and burn out DC contactor, so the failure rate is very high, and maintenance ia also a very heavy workload. For the traditional magnetic crane appears a variety of issues in the actual operation, we start this article with the magnetic circuit of magnetic lifting magnet, Which analyses and research the process of magnetic crane excitation and demagnetization further, and puts forward a multi-level variable constant current source magnetic-conditioning scheme. The scheme takes control of the exciting current, and makes the upfield of the magnetic Crane magnetize fast, demagnetization fast, less energy consumption, improve the steel loading speed, and improve the safety coefficient of magnetic crane by using the PLC programming and fully controlling bridge circuit.
传统的磁力起重机在实际运行中由于电磁铁线圈励磁饱和,容易产生过大的电流而造成能量的浪费。在退磁阶段,储存的能量通过电磁铁线圈的制动电阻热释放,没有反馈给电网,也造成了大量的浪费。另一个电磁铁是一个大的感性负载。当直流接触器接通或断开时,电感反电动势很大,而且很容易产生弧光,而烧坏直流接触器,所以故障率很高,而且维护工作也很繁重。针对传统磁力起重机在实际运行中出现的各种问题,本文从磁力起重磁铁的磁路入手,进一步分析和研究了磁力起重机的励磁和退磁过程,提出了一种多级可变恒流源磁力调节方案。该方案通过对励磁电流的控制,利用PLC编程和全控制桥电路,使磁力起重机的前场充磁快、退磁快、能耗少,提高了装钢速度,提高了磁力起重机的安全系数。
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引用次数: 0
Simulation of the dynamic behavior on two stator winding structures of motor operating mechanism for high-voltage disconnecting switch 高压断开开关电机操动机构两定子绕组结构的动态特性仿真
Pub Date : 2011-10-01 DOI: 10.1109/ICEPE-ST.2011.6122987
Xin Lin, Chunyu Qiao, Yongxiang Li, Jianyuan Xu, L. Song
The structure and parameters of the motor used in the operating mechanism is designed according to the characteristics requirement of disconnecting switch. The two kinds of stator winding structures, one of which is stator winding symmetric distribution and the other one of which is stator winding asymmetric distribution, are proposed in the motor design. The dynamic simulation is achieved by using the finite element method according to the two kinds of stator winding structures. The simulation results verify the reasonable of motor design and gain the characteristic curves (torque, current, revolution and angle, etc.). The analysis results indicate that both of the two stator winding structures motor have an excellent performance which can give a sufficient opening or closing speed to meet the requirements of disconnecting switch.
根据断开开关的特性要求,设计了操动机构所用电机的结构和参数。在电机设计中提出了定子绕组对称分布和不对称分布两种定子绕组结构。针对两种定子绕组结构采用有限元法进行了动态仿真。仿真结果验证了电机设计的合理性,得到了电机的特性曲线(转矩、电流、转速、角度等)。分析结果表明,两种定子绕组结构均具有优良的性能,能提供足够的开合速度,满足断开开关的要求。
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引用次数: 2
期刊
2011 1st International Conference on Electric Power Equipment - Switching Technology
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