计及运行工况影响的电力设备检修策略分析  

Comparative analysis on power equipment maintenance strategies considering the effect of operating conditions

作　　者：张煦[1] 张向伍[2] ZHANG Xu ZHANG Xiangwu(State Grid Wuxi Power Supply Company, Wuxi 214000, China State Grid Nanyang Power Supply Company, Nanyang 473000, China)

机构地区：[1]国网无锡供电公司,江苏无锡214000 [2]国网南阳供电公司,河南南阳473000

出　　处：《电力系统保护与控制》2017年第1期74-80,共7页Power System Protection and Control

摘　　要：电力设备在运行中不可避免地受老化、磨损和天气等运行工况的影响,故障率随时间增长具有累积效应,而不同等级的计划检修能不同程度地延缓电力设备可靠性恶化过程。基于电力设备故障率的时间累积效应和考虑计划检修对电力设备可靠性改善作用的役龄回退模型,以设备平均无效度为基础,得到系统可靠性/经济性指标解析表达式。针对以系统可靠性最优、系统检修费用最少和系统检修成本与系统停电成本之和最小为目标的三类检修决策问题,提出基于灵敏度和差分公式的协调优化算法。最后通过RBTS、IEEE-RTS79系统验证算法的有效性,并就几个不同检修方案从可靠性和经济性角度进行了对比分析。Electric power equipments suffer from aging, wearing, weather conditions in operation, the failure rate has a cumulative effect over time. The different grades of preventive maintenance can delay the deterioration of reliability distinctively. Based on the time cumulative effect of the failure rate and the effective age mode considering the reliability improvement with preventive maintenance, and taking the average unavailability as a link, the analytical expressions for the system reliability and economy indices are established. In view of the three kinds of maintenance decision-making targets, such as the system reliability optimization, the minimum of system maintenance cost, and the minimum of system maintenance cost and the system maintenance cost, this paper proposes an algorithm to coordinate and optimize preventive maintenance cycles based on the sensitivity and the differential. Finally, according to the studies on RBTS and IEEE-RTS79, the validity of the algorithm is verified, and it＇s analyzed and compared with other different preventive maintenance modes from the perspective of reliability and economy.

关 键 词：累积效应 役龄回退 平均无效度 协调优化 对比 

分 类 号：TM73[电气工程—电力系统及自动化] TM507