1. School of Electronic and Information Engineering, Xi'an Polytechnic University, Xi'an 710600; 2. School of Automation, Northwestern Polytechnical University, Xi'an 710114; 3. Engineering Training Centre, Xi'an Polytechnic University, Xi'an 710600
Abstract：Low-voltage circuit breakers are the main components of the control and protection of low-voltage AC and DC power distribution systems, and their electrical life is one of the performance indicators for measuring circuit breakers. Compared with low-voltage AC circuit breakers, DC circuit breakers have no current zero-crossing arc extinguishing feature, and its arc extinguishing and life evaluation are not easy. This paper studies the evaluation of the electrical life of the non-polarized DC miniature circuit breaker. The structure of the non-polarized DC miniature circuit breaker is explained. The arc characteristic analysis and electrical life test are carried out on the test platform, and the electrical life prediction model is established. The test results show that the stable combustion of the contacts by the arc is the main reason for the reduction of the electrical life of the circuit breaker. The proposed linear model of static contact ablation and arcing energy accumulation is effective in predicting its electrical life.
[1] LIU Xianglong, LIU Youbo, LIU Junyong, et al.Opti-mal planning of AC-DC hybrid transmission and distributed energy esource system: review and pro-spects[J]. Power and Energy Systems, 2019, 5(3): 409-422. [2] 王兴利, 赵科达, 胡浪涛, 等. 低压直流断路器时间常数探讨[J]. 电气技术, 2018, 19(10): 88-91. [3] 王兴利, 高翔, 陈丰飞, 等. 低压断路器飞弧危害及其改进措施[J]. 电气技术, 2018, 19(5): 105-108. [4] KIM H.Arcing characteristics on low-voltage DC circuit breakers[C]//2013 15th European Conference on Power Electronics and Applications (EPE), Lille, France, 2013: 1-7. [5] 陈晋生, 迟长春, 刘佳. 微型直流断路器中电弧电动力仿真分析[J]. 上海电机学院学报, 2020, 23(3): 144-148. [6] HANASHIRO S, NIKADORI Y, KANEKO E.Investi-gation on small DC vacuum arc characteristic under transverse magnetic field[C]//2015 3rd International Conference on Electric Power Equipment-Switching Technology (ICEPE-ST), 2015: 138-141. [7] GALVAN E, RODRIGUEZ J J.Study of the influence of permanent magnets in the interruption process of the electrical arc in MCB[C]//2017 IEEE Holm Con-ference on Electrical Contacts, 2017: 75-79. [8] 涂煜, 康锋, 马子文. 直流断路器吹弧磁场仿真及小电流开断试验研究[J]. 电器与能效管理技术, 2015(6): 6-9. [9] 李静, 杜志鹏, 曹云东, 等. 纵向磁场对真空电弧微观特性影响的研究[J]. 高压电器, 2019, 55(7): 63-69. [10] KAWAKAMI Y, HASEGAWA M, WATANABE Y, et al.An investigation for the method of lifetime prediction of Ag-Ni contacts for electromagnetic contactor[C]// Proceedings of the Fifty-First IEEE Holm Conference on Electrical Contacts, 2005: 151-155. [11] CUI Xinglei, ZHOU Xue, ZHAI Guofu, et al.Elec-trical lifespan prediction of HVDC relay based on the accumulated arc erosion mass[J]. IEEE Transactions on Components, Packaging and Manufacturing Technology, 2018, 8(3): 356-363. [12] 郑淑梅, 李奎, 刘政君, 等. 基于触头电弧侵蚀的交流接触器电寿命分布特征研究[J]. 中国电机工程学报, 2017, 37(22): 6730-6739, 6786. [13] 翟国富, 王淑娟, 许峰, 等. 基于超程时间和吸合时间建模的继电器双变量寿命预测方法的研究[J]. 中国电机工程学报, 2002, 22(7): 76-80. [14] 李华, 孙东旺, 贺鹏举, 等. 基于超程时间回归模型的继电器寿命预测方法[J]. 电工技术学报, 2013, 28(2): 414-417, 423. [15] 李奎, 李晓倍, 郑淑梅, 等. 基于BP神经网络的交流接触器剩余电寿命预测[J]. 电工技术学报, 2017, 32(15): 120-127. [16] 李奎, 高志成, 武一, 等. 基于统计回归和非线性Wiener过程的交流接触器剩余寿命预测[J]. 电工技术学报, 2019, 34(19): 4058-4070.
2022, Vol. 23 
