配电变压器保护用熔断器式隔离开关片状熔体温度特性分析  

Analysis on Temperature Characteristic of Flake Melt of Fuse-switch Disconnector for Distribution Transformer Protection

作　　者：杨翠茹 王文轩[2] 雷璟 刘东霖[2] 林一峰 杨颖[2] 

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]电力系统及发电设备控制和仿真国家重点实验室(清华大学),北京100084

出　　处：《广东电力》2016年第5期113-117,共5页Guangdong Electric Power

基　　金：广东电网有限责任公司科研项目(K-GD2014-0634)

摘　　要：配电变压器保护用熔断器的拒动问题会导致配电变压器的过载烧毁,引起严重的事故后果。针对配电变压器保护用的熔断器式隔离开关的片状熔体,建立了一种计算其温升随电流变化的数学模型,提出一种精确计算熔体热交换系数的方法。通过建立三维热电耦合模型,利用ANSYS对熔体进行仿真,与熔体实际温度状况的实验相结合,验证了在低倍数电流下的熔体仿真结果能与实际情况较好地吻合,有利于对配电变压器保护用熔断器进行较为精准的特性仿真与型式设计。Refusal-operation of fuse for distribution transformer protection may cause over-load burn-up of the distribution transformer and serious accident consequence.In allusion to flake melt of fuse-switch disconnection for distribution transformer protection,a kind of mathematical model for calculating temperature rise with change of current is established and a method for accurately calculating heat transfer coefficient of the melt is presented.It is verified that simulation result of the melt with low expansion current could be well identical to the actual condition by means of establishing 3D thermoelectric coupling model,using ANSYS software for simulation and combining with experiment on actual temperature condition of the melt.Meanwhile,it is proved to be beneficial for accurate characteristic simulation and pattern design on fuse for distribution transformer protection.

关 键 词：配电变压器保护 熔断器式隔离开关 片状熔体 ANSYS 热交换系数 

分 类 号：TM563[电气工程—电器]