10kV高压开关柜安全性能的提升方法  

Improve Method the Safety Performance of 10kV High Voltage Switchgear

作　　者：董盼 杨鑫[1] 贾鹏飞[2] 雷佳成 刘瑶[3] Dong Pan;Yang Xin;Jia Pengfei;Lei Jiacheng;Liu Yao(School of Electrical&Information Engineering Changsha University of Science and Technology Changsha,410114,China;China Electric Power Research Institute Beijing,100192,China;State Grid Beijing Electric Power Company Beijing,100031,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114 [2]中国电力科学研究院,北京100192 [3]国网北京市电力公司,北京100031

出　　处：《电工技术学报》2022年第11期2733-2742,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52177015);广东电网有限责任公司科技项目(GDKJXM20161905)资助。

摘　　要：针对10kV高压开关柜内部短路电弧引发的爆炸造成二次伤害的问题,该文从开关柜柜体和柜门安全裕度比较的角度出发,提出提高开关柜安全裕度的计算方法和设计建议。采用热源等效和分舱建模的方式,利用多物理场耦合的有限元仿真,对开关柜在短路电弧冲击作用下的安全裕度进行仿真计算。以电缆室为例,得出电缆室柜体和柜门的安全裕度值(分别为51%和2%),指出影响开关柜安全裕度的关键在于提升柜门的安全裕度值。提出在柜门内侧覆盖陶瓷化硅橡胶高分子复合耐火材料的方法来提升柜门的安全裕度,在电缆室柜门内侧压强较大区域覆盖3mm厚的陶瓷化硅橡胶高分子复合耐火材料,可将柜门的安全裕度提升至70%,进而提升开关柜的整体安全性能。与传统提升方法相比,更具针对性,促进设备向轻质化发展,为10kV开关柜安全等级提升提供了新的解决思路与方法。Aiming at the secondary damage of the explosion caused by the internal short-circuit arc of the 10kV high-voltage switchgear,the paper proposed calculation methods and design suggestions to improve the safety margin of the switchgear from the perspective of comparing the safety margin of the cabinet box and cabinet door.The heat source equivalent and sub-cabin modeling methods were adopted,and the finite element simulation calculation method of multi-physics coupling was used to simulate the safety margin of the switchgear under the impact of short-circuit arc.Taking the cable room as an example,the safety margin values(51%and 2%,respectively)of the cable room cabinet and the door were obtained.It is pointed out that the key to the safety margin of the switchgear is to increase the safety margin value of the cabinet door.A method of covering the inner side of the cabinet door with ceramic silicone rubber polymer composite refractory material is proposed to improve the safety margin of the cabinet door,and a 3mm thick ceramic silicone rubber polymer composite refractory material is covered in the area of high pressure inside the cabinet door.The safety margin of the cabinet door can be increased to 70%,and the overall safety performance of the switch cabinet is improved.Compared with traditional upgrading methods,it is more targeted,promotes the development of lightweight equipment,and provides new solutions and methods for upgrading the safety level of 10kV switchgear.

关 键 词：10kV 开关柜 短路电弧 安全设计 高分子材料 多物理场耦合 

分 类 号：TM591[电气工程—电器]