二硼化钛颗粒材料的电阻变化特性及其在故障限流中的应用  

Resistance Variation Characteristics of Titanium Diboride Particles and Its Application in Fault Current Limiting

作　　者：董恩源[1] 朱玉 王永兴[1] 张立岩 朱宇豪 杜广波 DONG Enyuan;ZHU Yu;WANG Yongxing;ZHANG Liyan;ZHU Yuhao;DU Guangbo(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China;China United Engineering Co.,Ltd.,Hangzhou 310052,China)

机构地区：[1]大连理工大学电气工程学院,大连116024 [2]中国联合工程有限公司,杭州310052

出　　处：《高电压技术》2023年第1期188-197,共10页High Voltage Engineering

基　　金：国家自然科学基金(51877026)。

摘　　要：二硼化钛(TiB2)颗粒材料具有故障限流的潜力。为实现这个目标,对颗粒材料的限流特性进行了研究。首先对压力-电阻关系进行了分析,二者满足幂函数关系。然后制作基于颗粒材料的样机,通过试验研究了材料尺寸和机构速度对限流效果的影响,发现材料尺寸越大、速度越快,限流效果越好。为进一步验证材料的限流能力,对材料的耐压特性进行测量,发现颗粒材料电压存在一个饱和值,该值取决于颗粒尺寸与材料性质。最后在PSCAD中建立颗粒材料电阻模型,对材料在电力系统中的限流效果进行仿真。仿真结果表明:颗粒材料与电抗器并联限流的方案可行性更高,可将故障电流峰值从34 kA限制到25.9 kA。该研究为颗粒材料在故障限流中的应用提供了参考。Titanium diboride(TiB2)granular material has the potential for fault current limiting.To achieve this goal,the current limiting characteristics of granular material have been studied in this paper.First,the force-resistance relationship is analyzed,and they satisfy the relationship of power function.Then,a prototype based on granular material is produced.The influence of material size and mechanism speed on current limitation is studied through experiments.It is found that the larger the material size and the faster the speed,the better the current limiting effect.In order to further verify the current limiting capability of the material,the voltage withstand characteristics of the material are measured.It is found that the voltage of the granular material has a saturation value,which depends on the particle size and material properties.Finally,the resistance model of the granular material is established in PSCAD.The current limiting effect of the material in the power system is simulated.The simulation results show that the current limiting scheme of the granular material and the reactor in parallel is more feasible.The peak value of the fault current can be limited from 34 kA to 25.9 kA.The research in this paper provides reference for the application of granular material in fault current limiting.

关 键 词：故障限流 颗粒物质 二硼化钛 饱和电压 电流转移 电阻变化特性 

分 类 号：TM471[电气工程—电器] TQ134.11[化学工程—无机化工]