摘要
为掌握电力变压器全寿命周期的状态变化情况,基于故障树分析法建立了变压器可靠度模型及变压器老化模型,利用最小二乘法拟合变压器运行年限–平均可靠度关系曲线,计算变压器进入各个寿命阶段的年限及平均无故障工作时间,从而为确定最佳维修周期、制定最优维修方案提供科学依据,达到延长变压器有效使用寿命的目的。算例结果验证该方法的有效性。
To have an insight into the state change of power transformer during its total life cycle, based on the fault tree analysis a reliability model and a ageing model of power transformer are built. The curve of the relation between operation years and mean reliability level （MRL） of power transformer is fitted by the method of least squares, and different age limits that power transformer comes into and mean time between failures （MTBF） are calculated to offer reasonable foundation to determine optimal maintenance period and draft optimal maintenance scheme to achieve the aim to prolong the service life of power transformer. The effectiveness of the proposed method is verified by results of calculation example.
出处
《电网技术》
EI
CSCD
北大核心
2011年第5期127-131,共5页
Power System Technology
基金
国家自然科学基金项目(50707009)~~
