EVALUATION OF TEMPERATURE RISE OF DISTRIBUTION TRANSFORMERS IN THE PRESENCE OF HARMONICS AND DISTORTION

被引：7

作者：

GIRGIS, AA

MAKRAM, EB

NIMS, JW

ODELL, LK

机构：

[1] Department of Electrical and Computer Engineering, Clemson University, Clemson

[2] Sangamo Weston, West Union, SC 29696

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 1990年 / 20卷 / 01期

关键词：

D O I：

10.1016/0378-7796(90)90021-T

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：

Core and copper losses of a distribution transformer increase in the presence of harmonics and distortion. In most of the cases, an indication of total harmonic distortion is known. Expressions for the transformer core and winding losses as a function of the total harmonic distortion are obtained experimentally using a harmonic generator, a 10 kVA 7200/120 V distribution transformer, and a digital oscilloscope equipped with digital processing software. The selection of the harmonics is based on actual recorded data. A thermal model of a distribution transformer is used to evaluate the temperature rise both with and without harmonics. The evaluation indicates that there is a significant increase in the operating temperature in the presence of high order harmonics, as compared with the operating temperatures when no harmonics are present. This paper presents the nature of the actual recorded data, the method of evaluation, and the results.

引用

页码：15 / 22

页数：8

共 11 条

[1]

Power system harmonics: an overview, IEEE Trans., 102 PAS, pp. 2455-2460, (1983)

[2]

Johnson, A quantitative study of current and voltage distortion in a primary distribution feeder, M.S. Thesis, (1985)

[3]

IEEE-PES Transformer Committee, Recommended Practice for Establishing Transformer Capability When Supplying Nonsinusoidal Load Currents, IEEE Publ. No. C57.110, (1986)

[4]

Hwang, Grady, Sanders, Calculation of winding temperatures in distribution transformers subjected to harmonic currents, IEEE PES Summer Meeting, (1987)

[5]

Hwang, Grady, Sanders, Distribution transformer winding losses due to nonsinusoidal currents, IEEE Trans., 2 PWRD, pp. 140-146, (1987)

[6]

Emanuel, Xiaoming Wang, Estimation of loss of life of power transformers supplying nonlinear loads, IEEE Trans., 104 PAS, pp. 628-636, (1985)

[7]

Emanuel, Szabados, Effect of voltage and current distribution on iron and copper losses, Int. Conf. Harmonics in Power Systems, pp. 106-112, (1984)

[8]

Makram, Thompson, Girgis, A new laboratory experiment for transformer modeling in the presence of harmonic distortion using a computer controlled harmonic generator, IEEE Trans., 2 PWRS, pp. 1857-1863, (1988)

[9]

Girgis, Makram, Baldwin, Computer-based harmonic generator facilities to study harmonic-related problems, IEEE Trans., 4 PWRS, pp. 1252-1257, (1989)

[10]

Girgis, Clapp, Makram, Jun Qiu, Dalton, Catoe, Measurement and characterization of harmonic and high frequency distortion for a large industrial load, IEEE Trans., 5 PWRD, pp. 427-434, (1990)

← 1 2 →