摘要
自愈式电容器具有无油、低噪声和储能密度高等优点,尤其适合于城市和清洁能源应用场合。为了获得自愈式电容器在运行情况下的温度场分布,在Fluent 15.0中建立了自愈式电力电容器承受400 V交流电压,环境温度为55°C情况下的温度场计算模型;采用有限体积法计算获得了其外壳和内部心子等的温度场分布并对计算结果进行了系统分析。计算结果表明:外壳最高温度在大侧面,大侧面温度高于小侧面。外壳和心子的平均温升分别为3°C和5°C左右,心子温度比外壳温度高2~3°C。分析了元件直径/数量和排布方式对电容器温升的影响并对元件直径和布置方式的选择提出了建议。该工作为自愈式电力电容器运行甚至电容器的优化提供了参考。
The paramount advantages of the self-healing capacitor are oil-free, low noise level and high storage en- ergy density. It is particularly well suited to apply in urban distribution network and clean energy storage. To ob- tain temperature filed distribution in the self-healing capacitor in working condition, the temperature filed calcu- lation model of a self-healing power capacitor subjected to an AC voltage of 400 V and at a temperature of 55 ℃ is formulated in Fluent 15.0. The above model is solved by finite volume method and the temperature distribution of capacitor shell and core are obtained and systematically investigated. The results reveal that： the hottest spot of the shell locates on the large side surface. The temperature of the large surface is higher than that of small side sur- face. The average temperature rise of shell and core are 3 ℃ and 5 ℃ respectively. The temperature of the core is 2～3 ℃ higher than that of shell. The influences of the element diameter/the number of element and arrangement of element on the temperature rise are investigated. The suggestions about the selections of element diameter/number and element arrangement are given. The above results can be taken as a reference to self-healing power capacitor operation and provide a potential method for the self-healing caoacitor ootimization.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第4期176-183,共8页
High Voltage Apparatus
