Real-Time Temperature On-Line Monitoring and Analysis System for Transformers

Abstract:

The safe operation of power transformers mainly depends on proper functioning of insulation, whose status is revealed by temperatures. Applying ZigBee wireless network, a real-time temperature on-line monitoring and analysis system is developed to view the operation status of underground distribution transformers and process fault diagnosis. Furthermore, using the top-oil and hot-spot temperature calculation method in IEEE Std C57.91-1995, the system can compute a prediction of those temperatures with current load ratio and ambient temperature. System will display early warnings if temperatures are much higher than expected ones, in which way insulation aging can be handled in advance. Insulation fault and big disasters will be prevented.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 409-413
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.409
• Online since: February 2014
• Authors: Ya Bo Chen*, Yue Sun, Xu Ri Sun, Ge Hao Sheng, Xiu Chen Jiang
• Keywords: Hot-Spot Temperature, On-Line Monitoring, Top-Oil Temperature, Zigbee Wireless Network

References

[1] Moses, Paul S., and Mohammad AS Masoum. Three-Phase Asymmetric Transformer Aging Considering Voltage-Current Harmonic Interactions, Unbalanced Nonlinear Loading, Magnetic Couplings, and Hysteresis., Energy Conversion, IEEE Transactions on 27. 2 (2012).

DOI: 10.1109/tec.2011.2181949

[2] Youli Zhang, Li Wang, Lan Xiong, et al. On-line Temperature Monitoring and State Evaluation System for 10kV Drytype Transformers, Electrical Measurement & Instrumentation, vol. 49, no. 558, pp.33-37, Jun. (2012).

[3] S. 1. Huang and P. K. Huang, Integrated Image-Detection with Wireless Sensor Networks for Unmanned Substation Monitoring, Proceedings of the 28th Symposium on Electrical Power Engineering, Taiwan, December 2007, pp. B04. 3_1-5.

[4] Huang, Yann-Chang, and Chao-Ming Huang. Evolving wavelet networks for power transformer condition monitoring., Power Delivery, IEEE Transactions on 17. 2 (2002): 412-416.

DOI: 10.1109/61.997908

[5] Chu, Donald, and Andre Lux. On-line monitoring of power transformers and components: a review of key parameters., Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Conference, 1999. Proceedings. IEEE, (1999).

DOI: 10.1109/eeic.1999.826290

[6] Nordman H, Rafsback N, Susa D. Temperature responses to step changes in the load current of power transformers[J]. Power Delivery, IEEE Transactions on, 2003, 18(4): 1110-1117.

DOI: 10.1109/tpwrd.2003.817516

[7] IEEE Guide for Loading Mineral-Oil-Immersed Transformers, IEEE Std. C57. 91-(1995).

[8] Tylavsky, Daniel J., et al. Transformer top-oil temperature modeling and simulation., Industry Applications, IEEE Transactions on 36. 5 (2000): 1219-1225.

DOI: 10.1109/28.871267