Transformer real-time reliability model based on operating conditions

被引：15

作者：

He Jian ^{[1
]}

Cheng Lin ^{[1
]}

Sun Yuan-zhang ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China

来源：

JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A | 2007年 / 8卷 / 03期

关键词：

operational reliability; real-time reliability model; transformer; winding hottest-pot temperature (HST);

D O I：

10.1631/jzus.2007.A0378

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Operational reliability evaluation theory reflects real-time reliability level of power system. The component failure rate varies with operating conditions. The impact of real-time operating conditions such as ambient temperature and transformer MVA (megavolt-ampere) loading on transformer insulation life is studied in this paper. The formula of transformer failure rate based on the winding hottest-spot temperature (HST) is given. Thus the real-time reliability model of transformer based on operating conditions is presented. The work is illustrated using the 1979 IEEE Reliability Test System. The changes of operating conditions are simulated by using hourly load curve and temperature curve, so the curves of real-time reliability indices are obtained by using operational reliability evaluation.

引用

页码：378 / 383

页数：6

共 24 条

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