基于多物理场耦合及温升特性研究的变压器热点温度建模与仿真分析

doi:10.3969/j.issn.1000-1158.2022.02.17

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摘要变压器温升特性研究尤其是热点温度测算不但能够指导变压器工程制造,而且有利于掌握变压器的运行状态,从而避免热故障的发生并指导变压器动态增容。对现有热点温度计算方法进行改进,提出一种基于多物理场耦合的油浸式变压器温升模型。以500kV油浸式变压器为例,采用能量守恒原理分析变压器热特性,建立变压器温度场与流场的数学模型和物理模型,分析变压器的温升特性、物理参数和材料特性,应用流-固-热耦合温度场进行仿真计算。通过仿真计算和分析对热点温度的具体分布部位和数值有了更深入的了解。该方法比经验公式计算所得热点温度值的准确度提升了4%,为变压器热点温度计算提供了一种新的计算思路。

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	许静
	刘树鑫

关键词 ：计量学, 变压器热点温度, 温升特性, 多物理场耦合, 热特性

Abstract：The research on the temperature rise characteristics of transformer, especially the hot spot temperature measurement, is helpful to master the operation state of transformer, so as to avoid the occurrence of thermal fault and guide the dynamic capacity increase of transformer. Aiming at the improvement of the existing hot spot temperature calculation method, a temperature rise model of oil immersed transformer based on multi physical field coupling is proposed. Taking 500kV oil immersed transformer as an example, the thermal characteristics of transformer are analyzed by using the principle of energy conservation. The mathematical and physical models of temperature field and flow field of transformer are established. The temperature rise characteristics, physical parameters and material characteristics of transformer are analyzed. The fluid solid thermal coupling temperature field calculation method is used for simulation calculation. Through simulation calculation and analysis, it has a deeper understanding of the specific distribution position and value of hot spot temperature.The accuracy of the mentioned method is 4% higher than that calculated by empirical formula, it provides a new calculation idea for the calculation of transformer hot spot temperature.

Key words： metrology transformer hot spot temperature temperature rise characteristics multi physical field coupling thermal characteristics

收稿日期: 2021-08-25 发布日期: 2022-02-23

PACS:

TB94

基金资助:辽宁省科技创新重大专项计划(2020JH1/10100012)

通讯作者: 刘树鑫(1982-),辽宁沈阳人,沈阳工业大学副教授,博士生导师,主要从事电器设备状态在线监测、电器智能化及测试技术方面的研究。Email: liushuxin@sut.edu.cn E-mail: rzs_xj@126.com

作者简介: 许静(1984-),女,辽宁沈阳人,国网辽宁省电力有限公司电力科学研究院高级工程师,沈阳工业大学博士研究生,研究方向为输变电设备状态评估、电力系统态势感知。Email: rzs_xj@126.com

引用本文:

许静,刘树鑫. 基于多物理场耦合及温升特性研究的变压器热点温度建模与仿真分析[J]. 计量学报, 2022, 43(2): 242-249.
XU Jing,LIU Shu-xin. Modeling and Simulation Analysis of Transformer Hot Spot Temperature Based on Multi Physical Field Coupling and Temperature Rise Characteristics. Acta Metrologica Sinica, 2022, 43(2): 242-249.

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