摘要
为了实现对智能变电站保护系统进行可靠性评估的目的,建立精确的保护系统可靠性评估模型至关重要。采用威布尔分布来表征设备老化时设备故障率随时间的变化情况。结合保护系统的计划检修行为,用改善因子来表征计划检修对设备故障率的降低作用,建立了计及设备老化与不完全计划检修的智能变电站保护系统可靠性评估模型。以线路保护系统为例,通过绘制线路保护系统可靠性时变曲线,计算线路保护系统的平均无故障工作时间和计划检修成本等指标对线路保护系统进行可靠性评估。结果表明所提方法能较为准确地反映设备老化与实际检修效果。
In order to realize the reliability evaluation of the intelligent substation protection system,it is very important to establish an accurate reliability evaluation model of the protection system.In this paper,Weibull distribution is used to characterize the change of equipment failure rate over time when the equipment is aging.Combined with the planned maintenance behavior of the protection system,the improvement factor is used to characterize the reduction effect of planned maintenance on the equipment failure rate,establishing the reliability evaluation model of intelligent substation protection system with incompletely planned maintenance and the aging of the equipment.Taking the line protection system as an example,the reliability of the line protection system is evaluated by plotting the time-varying curve of the line protection system reliability and calculating the mean time between failure and planned maintenance cost of the line protection system.The results show that the proposed method can more accurately reflect the aging of equipment and the actual maintenance effect.
作者
郭升
童晓阳
王洪彬
GUO Sheng;TONG Xiaoyang;WANG Hongbin(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;State Grid Chongqing Electric Power Research Institute,Chongqing 401123,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2019年第9期97-104,共8页
Power System Protection and Control
基金
国家自然科学基金面上项目资助(51377137)
国家电网公司科技项目资助(52199916024N)~~
关键词
智能变电站
保护系统
可靠性
设备老化
计划检修
intelligent substation
protection system
reliability
the aging of equipment
planned maintenance
