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Study and Design of Active Electronic Transformer

Author: ZhaoGuan
Tutor: SunYing
School: Shandong University
Course: Proceedings of the
Keywords: Active electronic transformer Data acquisition system ADE7569 Optical fiber transmission system Laser power supply
CLC: TM45
Type: Master's thesis
Year: 2010
Downloads: 287
Quote: 2
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Abstract


With the growing capacity of the power system and the continuous improvement of the voltage running level, the traditional electromagnetic transformer exposed the growing number of shortcomings, it is difficult to meet the needs of the development of the grid to automation, digital direction. Electronic transformer with high insulation, no saturation measurement range and excellent performance to become the new direction of development of the transformer. This paper studies the active electronic transformer: Rogowski coil electronic current transformer (ECT) and based on the principle of capacitor divider voltage electronic transformers (EVT). This paper first introduces the advantages of the problems faced by the traditional electromagnetic transformer electronic transformer, outlines the development of the electronic transformer substation automation system as well as electronic transformer and abroad. Then the definition of electronic transformers. The need for power sensor head section, divided into active electronic transformer and passive electronic transformer electronic transformer. The active electronic transformer includes five parts: the sensor head, the high-pressure side of the data acquisition system, optical fiber transmission system, power supply system and merged cells. The focus of the high-pressure side of the data acquisition system, the optical fiber transmission system and power supply system are as follows: 1, the high-pressure side of the data acquisition system is the focus of this study. The part of the third chapter of the data acquisition system were studied, including the A / D converter, a low pass filter, integrator, etc.. Because the data acquisition system is composed by the electronic components need to power their supply, so I chose a low-power data acquisition system is very important. Selected ADI's ADE7569 energy metering IC, it simply supply-side 3.3V power, the overall current consumption does not exceed 5mA normal working hours. For while, ADE7569 having the built 8052 can be directly to the data acquisition control, and simplifying the circuit structure. 2, the optical fiber transmission system has a large capacity, low loss, strong anti-jamming capability, it will the collected signal transmission by the high-pressure side to the low pressure side of the merged unit. Its role: one is used to transmit the measured current and voltage signals, the second is to ensure the high-pressure side and low-side electrical isolation, and reduce errors. This article describes several parts of the optical fiber transmission system comprising: optical fibers, the optical transmitter, the optical receiver. Optical transmitter using the Agilent company HFBR1414, optical receiver using its HFBR-2412 optical receiver module supporting. Fiber selection 62.5/125μm multimode glass communication optical fiber. 3, the high-pressure side of the line power supply problem is one of the key technologies in the study of active electronic transformer. In this paper, a comparison of several power supply, select laser energy supply program as an object of study. The key components required in the laser power supply scheme laser (LD), a photovoltaic cell, the operating characteristics of the DC-DC converter is made a detailed description, made intensive studies on the laser driving circuit, a protection circuit and a temperature control circuit . ADE7569 has advanced intelligent battery management mode, it has two power input interfaces often then 3.3V laser power supply, power supply interface, there is a battery backup interface when the external power supply can not be normal power supply, will automatically connected the 3.7V standby battery powered. Further, the optical fiber transmission system power supply (5V) is powered by a laser system.

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