Method and system for electric power data collection based on logarithm amplifier

A logarithmic amplifier and power data technology, applied in the field of power data acquisition and systems based on logarithmic amplifiers, can solve the problems of high number of digits, uneconomical, unrealizable, etc., to reduce cost and volume, save cost, and reduce channels number effect

Pending Publication Date: 2019-05-07
国网黑龙江省电力有限公司七台河供电公司
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Problems solved by technology

Generally, an A/D converter is often used to convert the analog signal into a digital signal. Under certain conversion accuracy requirements, the conversion of

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  • Method and system for electric power data collection based on logarithm amplifier
  • Method and system for electric power data collection based on logarithm amplifier
  • Method and system for electric power data collection based on logarithm amplifier

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[0036] The disclosure will be further described below in conjunction with the drawings and embodiments.

[0037] It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0038] It should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate There are features, steps, operations, devices, comp...

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Abstract

The invention provides a method and a system for electric power data collection based on a logarithm amplifier. The method comprises obtaining a voltage signal or a current signal of a measured line,and performing compression on the obtained signal based on the logarithm amplifier; performing digital processing on the compressed analog signal to obtain a digital signal; and performing expansion on the digital signal, and restoring the obtained signal. According to the method and the system for electric power data collection based on the logarithm amplifier, the dynamic range of the detected signal can be expanded to be more than 40 dB, and for an input system with 16 bits A/D, the dynamic range of the signal can be expanded to be more than 120 dB; the number of channels is reduced; the system structure can be simplified; and transmission capacity and storage capacity are reduced.

Description

technical field [0001] The present disclosure relates to a logarithmic amplifier-based power data acquisition method and system. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In order to ensure the normal operation of the power system, it is necessary to measure the voltage, current and other parameters on the power line, which requires the collection of power data. Generally, an A / D converter is often used to convert the analog signal into a digital signal. Under certain conversion accuracy requirements, the conversion of a large dynamic analog signal requires a higher resolution of the A / D, that is, a higher number of digits. Some occasions are uneconomical or even unrealizable. [0004] The logarithmic amplifier is introduced for dynamic compression, and the large dynamic input signal is logarithmically compressed to obtain a small...

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Application Information

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IPC IPC(8): G01R19/25
Inventor 刘长银任柳燕侯艳权赵晨宇姚越杜欣阳赵俊涛孟令军
Owner 国网黑龙江省电力有限公司七台河供电公司
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