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Study of Transformer On-line Monitoring Based on Vibration

Author: XuZhi
Tutor: YangYongMing
School: Chongqing University
Course: Electrical Engineering
Keywords: Transformer Vibration Method Online monitoring Fault Diagnosis
CLC: TM407
Type: Master's thesis
Year: 2010
Downloads: 280
Quote: 1
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Abstract


The power transformer is the largest and one of the most important equipment for use in power system, but also the power system network, and network key run state relations with the stability of the power system. Voltage multiplier detection methods are mainly two kinds of offline detection and line monitoring, online monitoring transformer running state in real-time and accurate detection of transformer operation, the transformer testing research has become a hot spot and the final trend. Traditional line transformer monitoring system (such as partial discharge, transformer oil, etc.) Because of the emphasis on the electrical, chemical, and other characteristics, and thus there is not comprehensive monitoring parameters. Based on the vibration monitoring method for online monitoring system of the transformer by the vibration sensor mounted on the body of the transformer device to measure a vibration signal of the running of the transformer, in order to analyze a state during operation of the transformer core and windings, and thus real-time access to the working state of the transformer. Is a non-electrical and non-destructive monitoring method, and can achieve the transformer fault location, and its study is of great significance and good prospect of application. Therefore, the article has designed a vibration method based transformer online monitoring system. The main work is as follows: 1) introduces the research background, including a line transformer monitoring developments at home and abroad as well as the purpose and significance of research projects, also described the related knowledge and common faults of the transformer. 2) demonstrated the feasibility of monitoring transformer vibration method, a detailed analysis of the problems of the vibration method of transformer principle and vibration online monitoring method to monitor transformer, the mechanisms and characteristics of the core and windings fault vibration. 3) for the transformer vibration characteristics, a detailed introduction to PSoC microcontroller and ICP acceleration sensor the transformer vibration monitoring system hardware and software design, as well as an important component of the selection, and hardware anti-jamming design. 4) the completion of the the corresponding vibration signal using the actual transformer vibration monitoring experiments and experimental results verify the different failure characteristics, which has laid a good foundation for transformer fault diagnosis based on vibration monitoring method for the ultimate realization. 5) of the vibration method method of monitoring transformer harmonic current preliminary inquiry, including the theoretical analysis and experimental analysis. After completion of the monitoring system developed, will provide a new and effective method for online monitoring of the transformer and in many aspects, but also need to continue to improve.

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > General issues > Maintenance,repair
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