摘要
为研究阀饱和电抗器过热机理及风险,分析了阀电抗器技术特点和工作原理,提出了铁心温升近似计算方法,采用实际运行工况温升试验数据拟合,建立了饱和电抗器铁心温升数学模型。结合故障饱和电抗器测试及解体检查结果,判断制造工艺缺陷会导致运行时铁心热量集中,加速绝缘材料老化。通过饱和电抗器燃烧仿真分析发现阀电抗器火焰、烟气、温度3种指标在电抗器起火100 s内逐渐进入稳态阶段。研究结果表明阀电抗器不易起火,即使在极端工况下起火,断电后其燃烧扩散的速度也较低。
To study the overheat mechanism and risk of valve saturated reactor,the technical characteristics and working principles of valve reactors are analyzed,and an approximate calculation method for core temperature rise is proposed,and by fitting with temperature rise test data under actual operating conditions,a mathematical model of saturated reactor core temperature rise is developed.Based on the results of faulty saturated reactor test and disassembly inspection,it is concluded that the manufacturing process defects will cause the heat concentration in the core during operation,which accelerates the aging of insulating materials.The simulation analysis of the saturable reactor combustion shows that the flame,smoke and temperature of the valve reactor gradually enter the steady-state within 100 s after the reactor being on fire.The results show that the valve reactor is not easy to catch fire.Even if it catches fire under extreme conditions,the combustion diffusion rate is low after tripping.
作者
刘堃
李凯
范彩云
常忠廷
胡四全
LIU Kun;LI Kai;FAN Caiyun;CHANG Zhongting;HU Siquan(XJ Group Co.,Ltd.,Xuchang,Henan 461000,China;XJ Electric Co.,Ltd.,Xuchang,Henan 461000,China)
出处
《南方电网技术》
CSCD
北大核心
2022年第9期18-25,共8页
Southern Power System Technology
基金
国家电网有限公司总部科技项目(5500-202156469A-0-5-ZN)。
关键词
换流阀
饱和电抗器
铁心
温升
燃烧仿真
converter valve
saturated reactor
iron core
temperature rise
combustion simulation
