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A Study of Merging Unit and Secondary Interface of Digital Optic-electric Transformer

Author: WanLei
Tutor: XuYan
School: Huazhong University of Science and Technology
Course: Theory and New
Keywords: Digital Electric Transformer Merging units Digital output Analog output
CLC: TM45
Type: Master's thesis
Year: 2005
Downloads: 450
Quote: 9
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Abstract


Current , voltage , power system is the basic physical quantities , the traditional current , voltage measuring devices for electromagnetic current , voltage transformers . However , with the increase in capacity of electric power system , the voltage level of increase , which has been difficult to meet the needs of the electric power system . Photoelectric current , voltage transformers as a new type of current , voltage measurement device has a small size , light weight , the ferromagnetic saturated ferromagnetic resonance frequency bandwidth , easy and microcomputer protection interface , has made rapid progress in recent years . Digital optical transformer in addition to traditional analog output interface , the digital interface with powerful communications capabilities . Digital electronic transformer output standard protocol to develop further accelerate the pace of development of the digital optical transformer . The basis of a comprehensive digital photoelectric transformer structure analog output interface digital output interface and digital calibration part , focuses on the digital output of the protocol and its hardware and software implementations . This paper first introduces the significance of research digital optical current and voltage transformers , combined with the development of domestic and international situation and gives the main content of this paper . Then , the digital optical current and voltage transformer structure and block diagram , and a brief analysis of some of the features and requirements of the secondary side of the circuit . Then I designed analog output interface of the secondary side , and its linearity distortion and phase error analysis . For digital output interface section first analyzes IEC61850-9-1 standard protocol , and then according to the protocol design software and hardware implementation of digital output interface . The digital output interface to meet the protocol 's standards data , also need the amount of the received digital digital calibration , I also analyze the the digital calibration process between digital optical current and voltage transformers with the host computer . Finally, the combination of a series of test results to draw conclusions : 220kV/2500A voltage / current combination of digital photoelectric transformer completely meet the design requirements , in order to verify the correctness of the foregoing theoretical analysis and program design .

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