大容量发电机断路器铸铝外壳在高温条件下的性能分析  

Performance analysis of large capacity generator circuit breaker with cast aluminum housing under high temperature

作　　者：张会杰 黄小凤 唐成 何晨光 徐浩 ZHANG Huijie;HUANG Xiaofeng;TANG Cheng;HE Chenguang;XU Hao(Xi’an XD Switchgear Electric Co.,Ltd,Xi’an 710077;China Southern Power Grid Peak Regulation and Frequency Regulation Power Generation Co.,Ltd,Guangzhou 510000)

机构地区：[1]西安西电开关电气有限公司,西安710077 [2]南方电网调峰调频发电有限公司,广州510000

出　　处：《电气技术》2022年第9期35-39,共5页Electrical Engineering

基　　金：中国南方电网有限责任公司重点科技项目“抽水蓄能机组成套开关设备关键技术研究及应用”(STKJXM20190198)。

摘　　要：大容量发电机断路器在实际运行时长期处于高温环境,需对高温环境下的发电机断路器关键零件——铸铝外壳的性能进行分析。通过采用温度传感器对铸铝外壳及壳体内部SF6绝缘气体温度进行实测可知,长期通流后,壳体的温度与壳体内部SF6气体的温度趋于平衡与一致。由壳体的最高工作温度确定壳体内部SF6气体的最高温度,再依据SF6气体温度与气体压力的曲线关系,确定铸件壳体的最高工作压力。同时,还测定了不同温度条件下与铸件外壳同牌号的单铸试棒的力学性能参数,最后根据最新判据对铸件壳体机械强度进行仿真计算。The large-capacity generator circuit breaker is in a high temperature environment for a long time in actual operation.It is necessary to analyze the performance of the generator circuit breaker cast aluminum housing under high temperature.The temperatures of the cast aluminum housing and the SFgas inside are measured by the temperature sensor,and it is concluded that the temperature of the housing and the temperature of the SFgas inside the housing tend to be balanced and consistent after a long-term flow.The maximum temperature of the SFgas inside the shell is determined by the maximum working temperature of the shell,and then the maximum working pressure of the casting shell is determined according to the curve relationship between the temperature of the SFgas and the gas pressure.At the same time,the mechanical property parameters of the single-casting test bars which are the same grade as the casting shell are measured under different temperature conditions,and finally the mechanical strength of the casting shell is simulated according to the latest criterion.

关 键 词：发电机断路器 铸铝外壳 高温环境 最高工作压力 力学性能 机械强度 

分 类 号：TM561[电气工程—电器]