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Study on Data Acquisition System of Active Optical-Electric Current Transformer

Author: BiRan
Tutor: XuYan
School: Huazhong University of Science and Technology
Course: Theory and New
Keywords: Electric Transformer Data acquisition High - voltage current measurement Low power consumption Performance evaluation
CLC: TM452
Type: Master's thesis
Year: 2005
Downloads: 324
Quote: 8
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Abstract


Production and life of the high demand for energy security of the power system, reliable and economic operation put forward higher requirements, the traditional current transformer has been unable to meet the needs of the electric power system development, research new technologies and suitable for the current measurement of power system The method has become imperative. To this end, the International Electrotechnical Commission (IEC) has developed the electronic current transformers standard, has laid a good foundation for the development of the new current transformers. Active optoelectronic current transformer is an important direction of development of the electronic current transformers, at home and abroad to carry out a lot of research work and made a lot of valuable experience in the practical aspects. Further study on the basis of the above work, high voltage AC and DC current digital measurement methods, and combined with the requirements of the subject, the design of the data acquisition system for optical current transformer. In this paper, the IEC electronic current transformer standards as the starting point, active optical current transformer compared several possible implementations, the final choice of digital measurement method based on a successive approximation analog-digital conversion, high measurement accuracy of the method, the system small delay. Further, given the active photoelectric current transformer block diagram, a detailed analysis of the composition and function of each part of the system, clear the composition of the data acquisition system as the object of this study. AC and DC Optical Current Transformer Data Acquisition system has a lot of similarities, there are some differences but because of the different nature of the measured signal and system requirements, the design of the two main control sampling and conversion the results of the processing methods, this paper carried out a comparative study. The analysis theory focus on the design of the the exchange data acquisition system, from design performance requirements, detailed design principles and methods, and the results of the root-mean-square algorithm error processing quantitative analysis. Many indicators of the performance of the data acquisition system, this article focuses on the dynamic performance evaluation method, and dynamic performance test in accordance with the method of exchange of data acquisition system. Finally AC and DC photoelectric current transformer machine performance test method, the test results met the design requirements, which proves the correctness of the foregoing analysis and design.

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