A temperature calculation method of oil immersed transformer considering delay effects and multiple environmental factors

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2022-12-01 DOI:10.1016/j.epsr.2022.108260

Ruizheng Ni , Jie Chen , Cheng Yang , Chao Li , Ruichang Qiu , Zhigang Liu , Runxin Li , Le Gao , Yongwei Li

{"title":"A temperature calculation method of oil immersed transformer considering delay effects and multiple environmental factors","authors":"Ruizheng Ni , Jie Chen , Cheng Yang , Chao Li , Ruichang Qiu , Zhigang Liu , Runxin Li , Le Gao , Yongwei Li","doi":"10.1016/j.epsr.2022.108260","DOIUrl":null,"url":null,"abstract":"<div><p>In the traditional transformer temperature calculation methods, the hot spot temperature (HST) is obtained by calculating the oil temperature rise, winding temperature rise, and then adding the ambient temperature. However, there is a gap between the HST calculated by this method and the measured temperature. There are two reasons for this phenomenon, the influence of environmental factors on the internal temperature of transformer has delay effect, and the influence of multiple environmental factors is not considered. By making corresponding improvements in these two aspects, an improved transformer HST calculation method is proposed. By comparing the calculated temperature of the improved method with the measured temperature, it is concluded that the internal temperature of the transformer can be well fitted by the proposed method. Through the comparative analysis with the traditional method, it is found that the calculation accuracy has been greatly improved. By analyzing the working data of transformers in different regions, different seasons and different operating years, the influence of multiple environmental factors on the temperature calculation and its change trend are summarized, and the effectiveness of this method is verified.</p></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"213 ","pages":"Article 108260"},"PeriodicalIF":3.3000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S037877962200462X","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 5

Abstract

In the traditional transformer temperature calculation methods, the hot spot temperature (HST) is obtained by calculating the oil temperature rise, winding temperature rise, and then adding the ambient temperature. However, there is a gap between the HST calculated by this method and the measured temperature. There are two reasons for this phenomenon, the influence of environmental factors on the internal temperature of transformer has delay effect, and the influence of multiple environmental factors is not considered. By making corresponding improvements in these two aspects, an improved transformer HST calculation method is proposed. By comparing the calculated temperature of the improved method with the measured temperature, it is concluded that the internal temperature of the transformer can be well fitted by the proposed method. Through the comparative analysis with the traditional method, it is found that the calculation accuracy has been greatly improved. By analyzing the working data of transformers in different regions, different seasons and different operating years, the influence of multiple environmental factors on the temperature calculation and its change trend are summarized, and the effectiveness of this method is verified.

查看原文本刊更多论文

一种考虑延迟效应和多环境因素的油浸变压器温度计算方法

在传统的变压器温度计算方法中，热点温度(HST)是通过计算油温升、绕组温升，再加上环境温度得到的。然而，用这种方法计算出的HST与实测温度之间存在一定的差距。造成这种现象的原因有两方面，一是环境因素对变压器内部温度的影响具有延迟效应，二是没有考虑多重环境因素的影响。通过对这两方面进行相应的改进，提出了一种改进的变压器HST计算方法。将改进方法的计算温度与实测温度进行比较，表明改进方法能较好地拟合变压器内部温度。通过与传统方法的对比分析，发现计算精度有了很大的提高。通过分析不同地区、不同季节、不同运行年份的变压器工作数据，总结了多种环境因素对温度计算的影响及其变化趋势，并验证了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.