|本期目录/Table of Contents|

[1]吴泳聪,阮江军,黎鹏,等. 开关柜温度 - 流体场优化计算研究[J].电机与控制学报,2020,24(07):1-11.[doi:10.15938/j.emc.2020.07.001]
 WU Yong-cong,RUAN Jiang-jun,LI Peng,et al. Optimum simulation of thermal field for switchgear[J].,2020,24(07):1-11.[doi:10.15938/j.emc.2020.07.001]
点击复制

 开关柜温度 - 流体场优化计算研究
(PDF)
分享到:

《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
24
期数:
2020年07
页码:
1-11
栏目:
出版日期:
2020-07-18

文章信息/Info

Title:
 Optimum simulation of thermal field for switchgear
作者:
 吴泳聪1 阮江军 1 黎鹏 2 龙明洋 1 龚宇佳 1
 (1. 武汉大学 电气与自动化学院,武汉 430072;2. 三峡大学 电气与新能源学院,湖北 宜昌 443002)
Author(s):
 WU Yong-cong 1 RUAN Jiang-jun 1 LI Peng 2 LONG Ming-yang 1 GONG Yu-jia 1
 (1. School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;2. College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China)
关键词:
开关柜温度 - 流体数值计算后验误差估计对流换热系数热源
Keywords:
 switchgear thermal-fluid coupled simulation posterior error estimation convective heat transfer coefficient heat source
分类号:
TM 11
DOI:
10.15938/j.emc.2020.07.001
文献标志码:
A
摘要:
针对开关柜温度 - 流体场计算量大、精度低等问题,从网格控制、边界条件及热源计算 3 个方面对其进行优化计算。首先提出了基于后验误差估计的网格修正方法,实现网格高效加密并减少冗余,在相同计算精度的条件下,所得网格的单元量仅为传统整体加密法的 32. 3%;通过建立开关柜外流场模型确定开关柜外壳截断边界,代替依赖经验的人工取值方法,得到无通风自然对流环境下外壳的对流换热系数为 0. 4 ~1. 4 W/(m 2 ·℃);进一步建立了开关柜电磁 - 温度 - 流体耦合计算模型,利用涡流场求解开关柜内热源分布,充分考虑交流热源、接触热源、涡流损耗对温度场的影响。将上述方法应用到 KYN28A -12kV/630A 开关柜的温升计算中,并与试验结果进行了对比,仿真与试验最大相对误差 3. 43%,证明了方法的有效性。
Abstract:
Regarding to the problems of huge calculation and low accuracy in thermal-fluid coupled field for switchgear,optimum simulation was carried out from the aspects of grid controlling,boundary condi-tions and heat source calculation. Firstly,the grid adaption method based on posterior error estimation was proposed to achieve efficient mesh refinement with less redundancy. The adapted mesh size is only32. 3% of that obtained with the traditional global-refining method. Then,an external flow model was
built to obtain the truncated boundary condition of the shell,replacing the determination process dependent on empiric values. Results show that the convective heat transfer coefficient under natural convection environment is 0. 4 W/(m 2 ·℃) ~1. 4 W/(m 2 ·℃). Afterwards,the eddy current field was used to obtain the heat generation in switchgear and the electromagnetic-thermal-fluid coupled simulation was built so that the influence of current non-uniformity,contact heat and eddy loss were considered. At last,
the methods were applied to the temperature rise simulation of KYN28A -12kV/630A switchgear and the results were compared with the test data. The maxi-mum relative error between simulation and experimental results is 3. 43%,which proves validity of the mentioned methods.

参考文献/References:

相似文献/References:

备注/Memo

备注/Memo:
收稿日期: 2019 -01 -26
基金项目:湖北省自然科学基金(2018CFB145)
作者简介:吴泳聪(1991—),男,博士研究生,研究方向为电磁多物理场分析与高压设备状态评估;
            阮江军(1968—),男,博士,博士生导师,研究方向为电磁多物理场分析与高压设备状态评估;
             黎 鹏(1989—),男,博士,讲师,研究方向为电磁多物理场分析与高压设备状态评估;
            龙明洋(1994—),男,硕士,研究方向为电力系统接地技术;
            龚宇佳(1996—),女,硕士,研究方向为电磁线圈发射技术,脉冲功率。
通信作者:黎 鹏
更新日期/Last Update: 2020-09-09