Economic and safe operation of parallel transformer considering hottest-spot temperature

被引：1

作者：

Zhu, Liuhui ^{[1
]}

Sheng, Gehao ^{[1
]}

Bai, Wanjian ^{[2
]}

Chen, Jing ^{[2
]}

Liu, Yadong ^{[1
]}

Cui, Ronghua ^{[2
]}

Jiang, Xiuchen ^{[1
]}

机构：

[1] Department of Electrical Engineering, Shanghai Jiao Tong University

[2] Heze Power Supply Company, Shandong Electric Power Corporation

来源：

Zhu, L. (sjtu_luckey@163.com) | 1600年 / Electric Power Automation Equipment Press卷 / 33期

关键词：

Hottest-spot temperature; Life assessment; Overload; Parallel operation; Power transformers;

D O I：

10.3969/j.issn.1006-6047.2013.10.017

中图分类号：

学科分类号：

摘要：

An operating strategy considering the real-time variation of hottest-spot temperature is proposed to ensure the safety of parallel power transformer during overload operation. The daily load curve is divided into high-load period and low-load period according to the actual load variation. During the high-load period, both the minimum power loss of economic operation and the temperature rise of transformer hottest-spot should be considered, by which, the economic operating mode and the switching time of parallel power transformers can be determined. It applies the finite difference method to estimate the hottest-spot temperature according to the load curve and ambient temperature and adopts the binary searching method to obtain the optimal switching time. Analysis of two three-winding transformers with different capacities and running in parallel shows that, the proposed strategy ensures the safe operation of transformers as well as reduces the transformer loss.

引用

页码：95 / 100

页数：5

共 21 条

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