Loading of transformers in conditions of controlled cooling system

被引：13
|
作者：
Radakovic, Zoran [1 ]
Jacic, Dusan [1 ]
Lukic, Jelena [2 ]
Milosavljevic, Srdjan [2 ]
机构：
[1] Univ Belgrade, Fac Elect Engn, Belgrade, Serbia
[2] Inst Nikola Tesla, Belgrade, Serbia
来源：
INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS | 2014年 / 24卷 / 02期
关键词：
transformer loading; fouling of transformer coolers; automatic control of transformer cooling system; monitoring of power transformer; POWER TRANSFORMERS; TEMPERATURES;
D O I：
10.1002/etep.1688
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The paper deals with thermal modelling of transformers with automatic control of the cooling system. The case study was done on 725 MVA transformer with OFAF cooling, having eight compact coolers, each of them with their own pump and hysteresis control: four coolers, when top oil temperature drops below 30 degrees C, and six coolers, when top oil temperature rises above 45 degrees C. The consequence of operation with different number of coolers is change of thermal characteristics of the transformer. Additional phenomenon causing change of thermal characteristics is fouling of the coolers. These variable thermal characteristics are included in mathematical models used for the calculation of top oil and hot-spot temperatures in all applications of such calculation algorithms: protection, monitoring, estimation of overload capability, calculation of thermal ageing, etc. Copyright (c) 2012 John Wiley & Sons, Ltd.
引用
收藏
页码：203 / 214
页数：12
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