Photo signal digital collection module for electric power optical potential sensor

An optical voltage and digital acquisition technology, applied in the field of electric power automation, can solve problems such as signal distortion, narrow frequency band, explosion, etc., and achieve the effect of eliminating interference

Inactive Publication Date: 2003-08-06
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

As the power transmission capacity of the power system is getting larger and the voltage level is getting higher and higher, it has fully exposed its own shortcomings and problems: large and heavy, high cost, and ferromagnetic saturation due to the iron core. Magnetic resonance and hysteresis, narrow frequency band, easy to distort rapidly changing signals, easy to explode when oil is used as filling, bring hidden dangers to the safety of power system operation, require complex and expensive insulation measures, etc.

Method used

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  • Photo signal digital collection module for electric power optical potential sensor
  • Photo signal digital collection module for electric power optical potential sensor
  • Photo signal digital collection module for electric power optical potential sensor

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, the signal acquisition module of the present invention is mainly composed of two signal amplification circuits, two analog-to-digital conversion circuits, two latch circuits and a DSP module. The input terminals of the photoelectric signal are respectively connected with a signal amplification circuit composed of an operational amplifier connected with a peripheral resistor, and the output terminals of the signal amplification circuit are respectively connected with the input terminals of an analog-to-digital converter, and the analog-to-digital converter and its peripheral circuit form an analog-to-digital conversion circuit . The output of the analog-to-digital converter is connected with the input terminal of the latch circuit, and the output of the latch circuit is connected with the DSP ...

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Abstract

The invention is a digital collection module of the optical signal of the electric power optical voltage snesor, adopting the two-way synchronous sampling asynchronous transmission mode and the self-adaptive filter to process the signal. Firstly make the sample signal pass through two-way amplifying circuit, then make the A/D conversion in two-way A/D converting circuit, the then use the latchingcircuit to latch it, and finally use the filter to process it in the DSP module in order to filter the noise mixed in the signal.

Description

Technical field: [0001] The invention relates to an optical signal digital acquisition module of an electric optical voltage sensor, which is used for optical signal digital acquisition and processing of a photoelectric voltage transformer in high-voltage electric power testing, and belongs to the technical field of electric power automation. Background technique: [0002] Optical Voltage Transducer (Optic Voltage Transducer), commonly known as Photoelectric Voltage Transformer (Electro Optic Voltage Transformer), is a new generation of high-voltage measurement equipment for power systems based on the Pockels effect. Compared with traditional voltage transformers, it has obvious advantages, such as fast response, free from electromagnetic interference, safe and convenient to use. [0003] The power optical voltage sensor is mainly composed of three parts, an insulating main unit, an optical crystal sensitive unit, and a digital signal real-time processing unit. The digital ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
Inventor 杨煜普宋军强余致春
Owner SHANGHAI JIAO TONG UNIV
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