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浙江大学学报(工学版)
Journal of ZheJiang University (Engineering Science)  2024, Vol. 58 Issue (11): 2309-2319    DOI: 10.3785/j.issn.1008-973X.2024.11.012
    
Switching characteristic of quick mechanism for on-load tap-changer in oil environment
Guoxin MAO1(),Ke WANG2,Geqi LI2,Jinhua ZHANG1,*(),Jun HONG1,Bin FANG1,Jian ZHUANG1
1. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi'an 710049, China
2. China Electric Power Research Institute, Beijing 100192, China
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Abstract  

Switching characteristics of the quick mechanism for the on-load tap-changer in oil environment were analyzed by using Particleworks based on a moving particle semi-implicit method. The working principle of the quick mechanism of on-load tap-changer was introduced, the mechanical structure of a quick mechanism of on-load tap-changer was designed, and the basis for dynamic calculation of the quick mechanism in the oil environment was provided. A dynamic simulation model in the oil environment was established for the quick mechanism of the on-load tap-changer, and switching characteristics were compared between the quick mechanism with and without transformer oil environment. The drive torque of the drive motor was required to be greater than 40 N·m. The influence of oil viscosity and energy storage spring stiffness on the switching characteristics of the fast mechanism was analyzed. The variation law of the oil resistance torque of the flywheel in the switching process of the fast mechanism under the oil environment was obtained, and the reasons for the variation and fluctuation of the resistance torque of the flywheel were revealed through the flow field analysis.

Key words： on-load tap-changer      quick mechanism      moving particle semi-implicit method      oil environment     
Received: 30 August 2023      Published: 23 October 2024
CLC:  TP 393  
Fund:  国家重点研发计划资助项目（2021YFB2402100）.
Corresponding Authors: Jinhua ZHANG     E-mail: sdqfmgx@stu.xjtu.edu.cn;jjshua@mail.xjtu.edu.cn
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Guoxin MAO
Ke WANG
Geqi LI
Jinhua ZHANG
Jun HONG
Bin FANG
Jian ZHUANG
Cite this article:

Guoxin MAO,Ke WANG,Geqi LI,Jinhua ZHANG,Jun HONG,Bin FANG,Jian ZHUANG. Switching characteristic of quick mechanism for on-load tap-changer in oil environment. Journal of ZheJiang University (Engineering Science), 2024, 58(11): 2309-2319.

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https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2024.11.012     OR     https://www.zjujournals.com/eng/Y2024/V58/I11/2309


油液环境中有载分接开关快速机构切换特性

利用基于移动粒子半隐式方法的Particleworks，分析有载分接开关快速机构在油液环境中的切换特性. 介绍有载分接开关快速机构的工作原理，设计有载分接开关快速机构的机械结构，给出快速机构在油液环境下的动力学计算基础. 建立该有载分接开关快速机构在油液环境中的动力学仿真模型，对照了该快速机构在有无变压器油液环境中的切换特性差异，得到驱动电机的驱动扭矩要求大于40 N·m. 分析油液黏度和储能弹簧刚度对该快速机构切换特性的影响，得到快速机构在油液环境下切换过程中飞轮受到的油液阻力矩的变化规律，通过流场分析揭示了飞轮受到的阻力矩变化和波动的原因.


关键词： 有载分接开关,  快速机构,  移动粒子半隐式方法,  油液环境 
Fig.1 Application diagram of quick mechanism of on-load tap-changer
Fig.2 Schematic diagram of quick mechanism of on-load tap-changer　　　　　
Fig.3 Flow chart of quick mechanism switching of on-load tap-changer
Fig.4 Schematic diagram for calculating torque of flywheel subjected to oil resistance
Fig.5 Simulation model of fast mechanism
弹簧名称原长/mm刚度系数/(N·mm?1)
储能弹簧19521
吸振块弹簧5028
棘爪弹簧505
扳机弹簧651.4
拨杆弹簧1151.4
Tab.1 Spring parameter table of quick mechanism
Fig.6 Establishment process of dynamic simulation model of fast mechanism in oil environment
参数数值
油箱内壁直径/mm458
油箱内壁高度/mm286
粒子密度/(kg·m?3)882.6
粒子黏度/(mm2·s?1)7.179
粒子直径/mm5
Tab.2 Key parameters of dynamic modeling in oil environment
Fig.7 Motion curve of some parts of quick mechanism of on-load tap-changer
Fig.8 Flywheel switching characteristic of fast mechanism of on-load tap-changer
Fig.9 Comparison of motion characteristic of fast mechanism with and without transformer oil environment
序号$\delta $/(mm2·s?1)$k$/(N·mm?1)$ {t_0} $/ms
17.1792196.2
27.1792293.7
37.1792391.1
47.1792489.1
57.1792587.5
67.1792685.1
77.1792781.8
87.1792881.5
Tab.3 Effect of different energy storage spring stiffness on mechanical switching time of fast mechanism
Fig.10 Change of mechanical switching time of fast mechanism with stiffness of energy storage spring coefficient
序号$\delta $/(mm2·s?1)$k$/(N·mm?1)$ {t_0} $/ms
17.1792196.2
21082196.6
32102197.1
43112197.4
54122197.7
65132198.0
76142198.2
8715.42198.6
Tab.4 Effect of different transformer oil viscosity on mechanical switching time of fast mechanism
Fig.11 Change of mechanical switching time of fast mechanism with transformer oil viscosity
Fig.12 Dynamic characteristic of fast mechanism transformer in oil environment
Fig.13 Relation diagram of oil resistance moment with flywheel rotation angular speed
Fig.14 Change of particle pressure nephogram during fast mechanism switching in oil environment
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