全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
高压电器  2015 

基于DGM的油浸式变压器热点温度计算

, PP. 28-34

Keywords: 油浸式变压器,绕组热点温度,间断式伽辽金方法(DGM)

Full-Text   Cite this paper   Add to My Lib

Abstract:

为了准确计算油浸式变压器的热点温度,在对比了有限元法(FEM)和有限体积法(FVM)计算变压器热点温度各自特点的基础上,提出了基于间断式伽辽金方法(discontinuousGalerkinmethod,DGM)的一种计算变压器热点温度的全新计算方法;并以天威合肥变压器厂的一台180MV?A-220kV变压器为例,计算了变压器的绕组热点温度。为校验计算方法的准确性,笔者对这台主变进行了变压器绕组温升试验,监测了绕组的热点温度数据,并将利用DGM的计算结果分别与实际监测数据、IEEE导则计算数据、使用FEM算法计算出的数据以及使用FVM算法计算出的数据进行了对比。对比结果表明,利用DGM的计算结果与实际监测数据的标准差只有1.46℃,而利用IEEE导则模型计算结果、FEM算法计算结果以及FVM算法计算结果与实际监测数据的标准差分别高达4.81、3.71、2.58℃。DGM的计算精度明显高于IEEE导则模型、FEM算法和FVM算法,证明了DGM能更准确地计算油浸式变压器绕组热点温度。

References

[1]  WANG M,VANDERMAAR A J,SRIVASTAVA K D. Review of condition assessment of power transformers in service[J]. IEEE Electrical Insulation Magazine,2002,18(6):12-25.
[2]  IEEE. Std C57. 91―1995 Guide for loading mineral-oil-immersed transformers[S].1996.
[3]  IEEE. Std 1538―2000 Guide for determination of maximum winding temperature rise in liquid-filled transformers[S]. 2000.
[4]  刘文泽,蔡泽祥,黄松波,等. 高压电力电容器内部最热点温度的计算模型[J]. 电力自动化设备,2009,29(7):82-84. LIU Wenze,CAI Zexiang,HUANG Songbo,et al. Calculation model of HV power capacitor internal hottest-spot temperature[J]. Electric Power Automation Equipment,2009,29(7):82-84.
[5]  GALDI V,IPPOLITO L,PICCOLO A,et al. Neural diagnostic system for transformer thermal overload protection[C]//IEE Proceedings Electric Power Applications.[S.l.]:IEE,2000:415-421.
[6]  GALDI V,IPPOLITO L,PICCOLO A,et al. Application of local memory-based techniques for power transformer thermal overload protection[J]. IEE Proceedings Electric Power Applications,2001,148(2):163-170.
[7]  SWIFT G,MOLINSKI T S,BRAY R,et al. A fundamental approach to transformer thermal modeling-Part II: Field verification[J]. IEEE Transactions on Power Delivery,2001,16(2):176-180.
[8]  SWIFT G,MOLINSKI T S,LEHN W. A fundamental approach to transformer thermal modeling. I. Theory and equivalent circuit[J]. IEEE Transactions on Power Delivery,2001,16(2):171-175.
[9]  SWIFT G W,ZOCHOLL S E,BAJPAI M,et al. Adaptive transformer thermal overload protection[J]. IEEE Transactions on Power Delivery,2001,16(4):516-521.
[10]  LESIEUTRE B,HAGMAN W,KIRTLEY J. An improved transformer top oil temperature model use in an on-line monitoring and diagnostic system[J]. IEEE Transactions on Power Delivery,1997,12(1):249-256.
[11]  TYLAVSKY D J,QING He,JENNIE S,et al. Transformer top-oil temperature modeling and simulation[J]. IEEE Transactions on Industry Applications,2000,36(5):1219-1225.
[12]  陈伟根,苏小平,陈 曦,等. 变压器顶层油温预测热模型影响因素分析及其改进[J]. 高电压技术,2011,37(6):1329-1335. CHEN Weigen,SU Xiaoping,CHEN Xi,et al. Influence factor analysis and improvement of the thermal model for predicting transformer top oil temperature[J]. High Voltage Engineering,2011,37(6):1329-1335.
[13]  SKILLEN A,REVELL A,IACOVIDES H,et al. Numerical prediction of local hot-spot phenomena in transformer windings[J]. Applied Thermal Engineering,2012,36(1):96-105.
[14]  WAKIL N E,CHERECHES N C,PADET J. Numerical study of heat transfer and fluid flow in a power transformer[J]. International Journal of Thermal Sciences,2006,45(6):615-626.
[15]  井永腾,李 岩. 额尔和木巴亚尔.高压自耦变压器的涡流损耗计算与屏蔽措施[J]. 高电压技术,2012,38(8):1988-1990. JING Yongteng,LI Yan.Eddy current losses calculation and shields of high voltage auto-transformer[J]. High Voltage Engineering,2012,38(8):1988-1990.
[16]  李 剑,刘兴鹏,王有元,等. 以箱壁温度为判据的油浸式变压器绕组热点温度计算模型及试验分析[J]. 高电压技术,2011,37(10):2344-2349. LI Jian, LIU Xingpeng, WANG Youyuan,et al. Model of hot spot temperature in oil-immersed transformers using temperature estimation of tank wall[J]. High Voltage Engineering,2011,37(10):2344-2349.
[17]  GASTELURRUTIA J,RAMOS J C,LARRAONA G S,et al. Numerical modelling of natural convection of oil inside distribution transformers[J]. Applied Thermal Engineering,2011,31(4):493-505.
[18]  陈伟根,苏小平,孙才新,等. 基于有限体积法的油浸式变压器绕组温度分布计算[J]. 电力自动化设备,2011,31(6):23-27. CHEN Weigen,SU Xiaoping,SUN Caixin,et al. Temperature distribution calculation based on FVM for oil-immersed power transformer windings[J]. Electric Power Automation Equipment,2011,31(6):23-27.
[19]  陈二云,赵改平,马大为. 冲击射流的间断有限元仿真研究[J]. 系统仿真学报,2010(12):2791-2794. CHEN Eryun,ZHAO Gaiping,MA Dawei. Simulation of impinging jet using discontinuous finite element method[J]. Journal of System Simulation,2010(12):2791-2794.
[20]  张 磊,袁 礼. 龙格库塔间断有限元方法在计算爆轰问题中的应用[J]. 计算物理,2010,27(4):509-517. ZHANG Lei,YUAN Li. Runge-Kutta discontinuous galerkin method for detonation waves[J]. Chinese Journal of Computational Physics,2010,27(4):509-517.
[21]  吴 迪,蔚喜军. 自适应间断有限元方法求解三维欧拉方程[J]. 计算物理,2010,27(4):492-500. WU Di,YU Xijun. Adaptive discontinuous galerkin method for euler equations[J]. Chinese Journal of Computational Physics,2010,27(4):492-500.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133