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Calibration and Online Monitoring System for Electronic Transformer Based on IEC61850-9

Author: LiBaoLei
Tutor: YouDaHai
School: Huazhong University of Science and Technology
Course: Proceedings of the
Keywords: Electronic Transformer Digital output Calibrator Bimodal spectrum FFT Frequency correction
CLC: TM45
Type: Master's thesis
Year: 2011
Downloads: 49
Quote: 0
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Abstract


Countries UHV power grid , intelligent substation construction , electrical equipment , intelligent degree of digitization has become increasingly high , the new electronic power transformer has begun to replace the traditional electromagnetic power transformer , power system measurement and an important cornerstone of the measurement . Reliable operation of the power system , the digital output of the electronic transformer check is a very important part . Domestic and foreign research institutions and enterprises gradually introduced a the experimental calibration system . Monitoring the check online monitoring system , in this article in accordance with IEC61850-9-2LE Statute , to build an electronic transformer , electronic transformer digital output can be used in the production of large quantities checksum and run online . The system runs on the parity check mode , the standard analog signals of field data acquisition unit for the digital signal , the the collected digital signal combining unit , to send to the system host computer via Ethernet broadcast together ; software modules through the network listens to receiving data packets, the calculated ratio on the two -way signal to complete the calibration process . When equipped this checksum and monitoring systems host access site Ethernet , the system can be based on the numeric value and quality parameters of sampled values ??, online monitoring tasks to complete on-site transformer equipment . The system entirely in C, C # language development , to avoid dependence on foreign commercial software ; introduction of the FFT the bimodal spectral correction algorithm effectively reduces the non- synchronous sampling and Fourier transform due to measurement error . Finally, through the simulation experiment to prove the reliability and accuracy of the system .

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Transformer
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