Study on Condensation of the Moisture in Current Transformers with Current Flow Considering Sharp Temperature Decrease

Zhen Hua Yan; Xiang Ren; Hang Ren; Wei Dong Ding

doi:10.4028/www.scientific.net/AMM.241-244.322

Paper Titles

The Fault Diagnosis System Design Based on PMA
p.304

Design and Application of Integrated Diagnosis Inference System
p.308

Research on Key Technology of Knowledge-Based Intelligent Fault Diagnosis of Hydraulic System
p.313

Study on the Interlaboratory Comparison Test of the Electronic Test Method for Raw Silk
p.317

Study on Condensation of the Moisture in Current Transformers with Current Flow Considering Sharp Temperature Decrease
p.322

Application of Fault Detection Based on Variable Precision Rough Sets
p.328

The Evaluation Method of Critical Equipments in a PdM System
p.332

ADS40 Test Field Calibration Using Posteriori Compensation Method
p.336

Accuracy Analysis of SRTM-DEM in Qinling-Dabashan Area
p.342

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 241-244Study on Condensation of the Moisture in Current...

Study on Condensation of the Moisture in Current Transformers with Current Flow Considering Sharp Temperature Decrease

Abstract:

On-site experience suggests the possibility of condensation of the moisture in Current transformers (CTs) with initial moisture content lower than the Chinese National Standard. In order to verify such possibility, the relationship between moisture content and ambient temperature in a typical 110 kV CT is studied. The positive correlation of ambient temperature and moisture content without current flow is clarified, and the relationship of moisture content and current RMS value is studied. Increase in current results in increase of moisture content, and the longer the duration of operation, the larger the moisture content. The possibility of frost condensation of the moisture with sharp ambient temperature decrease has been confirmed with initial moisture content lower than the Chinese National Standard.

You might also be interested in these eBooks

Industrial Instrumentation and Control Systems

View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volumes 241-244)

Pages:

322-327

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.241-244.322

Citation:

Cite this paper

Online since:

December 2012

Authors:

Zhen Hua Yan, Xiang Ren, Hang Ren, Wei Dong Ding

Keywords:

Condensation, Current Transformer (CT), Moisture Content, Relative Humidity

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] T. Nitta, Y. Shibuya, Y. Fujiwara, Y. Arahata, H. Takahashi, H. Kuwahara, IEEE Transactions on Power Apparatus and Systems Vol. PAS-97 (1978), p.959

DOI: 10.1109/tpas.1978.354569

Google Scholar

[2] IEEE Standards Board, in: IEEE Guide for Moisture Measurement and Control in SF6 Gas-Insulated Equipment. (1993)

DOI: 10.1109/ieeestd.2013.6692861

Google Scholar

[3] Li Taijun, Wang Zhangqi, Zhang Ting, Liu Quanzhi, Proceedings of the CSEE Vol. 23 (2003), p.169 (in Chinese)

Google Scholar

[4] Chao Lv, Xiaoguang Hu, Proceedings of the CSEE Vol. 26 (2006), p.151 (in Chinese)

Google Scholar

[5] Chun Lin, Ningxia Electric Power Vol. 6 (2010), p.55 (in Chinese)

Google Scholar

[6] National Development and Reform Commission, in: Method of Humidity Measurement of SF6 Insulated Gas in Electrical Equipment. The National Standards in Power Industrial (2008) (in Chinese)

Google Scholar