摘要
继电保护装置内部包含大量的电子器件,环境的温湿度、振动等对继电保护装置的可靠性都有影响。针对安装在开关柜中的保护装置在运行期间受到的温度应力的复杂动态变化,将环境温度视为一个服从正态分布的随机变量,结合Arrhenius模型与Weibull模型,由条件概率密度函数以及温度应力分布的概率密度函数推导出保护装置失效的全概率密度函数、可靠度函数和失效率函数。通过数值计算方法,得到温度的均值参数和方差参数变化对保护装置可靠性的影响,为继电保护装置在现场运行的可靠性研究提供理论依据。
Relay protection devices contain numerous electronic components,and environmental factors such as temperature,humidity,and vibration can impact their reliability.Addressing the complex dynamic changes in tem⁃perature stress experienced by protection devices installed in switchgear during operation,this study considers envi⁃ronmental temperature as a random variable following a normal distribution.Based on the Arrhenius model and the Weibull model,conditional probability density functions along with probability density functions of temperature stress distribution are used to derive the overall probability density function,reliability function,and failure rate function of protection devices.Through numerical computation,the study assesses the impact of changes in tempera⁃ture mean and variance parameters on the reliability of protection devices,providing a theoretical basis for reliabil⁃ity research on relay protection devices during field operation.
作者
龚杰
徐习东
杨剑友
方愉冬
GONG Jie;XU Xidong;YANG Jianyou;FANG Yudong(Zhejiang University,Hangzhou 310027,China;State Grid Wenzhou Power Supply Company,Wenzhou,Zhejiang 325000,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China)
出处
《浙江电力》
2024年第4期105-112,共8页
Zhejiang Electric Power
基金
国家自然科学基金资助项目(62293502,62293500)
国网浙江省电力有限公司温州供电公司科技项目(WZ920000857)。
