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A Data Acquisition System with High Speed, High Precision and High Isolation Voltage

A data acquisition system and high-precision technology, applied in the field of power systems, can solve the problems of complex implementation, high price, and bulky isolation components, and achieve the effect of improving the isolation voltage level, improving the sampling accuracy, and realizing high-voltage isolation.

Inactive Publication Date: 2016-08-31
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the isolation element is bulky and expensive, especially the voltage / current Hall needs to be powered separately, which is complicated to implement

Method used

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  • A Data Acquisition System with High Speed, High Precision and High Isolation Voltage
  • A Data Acquisition System with High Speed, High Precision and High Isolation Voltage
  • A Data Acquisition System with High Speed, High Precision and High Isolation Voltage

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] A high-speed, high-precision, and high-isolation voltage data acquisition system proposed in this embodiment includes a first-stage circuit and a second-stage circuit connected in series; the first-stage circuit adopts a differential method for collecting line signals, and the After filtering, it is passed to the second-stage circuit; the second-stage circuit converts and isolates the signal and outputs it. The structural block diagrams of the first-level circuit and the second-level circuit are as follows: figure 1 and figure 2 shown. Below this embodiment is described in detail:

[0031] first stage circuit

[0032] The structural block diagram of the first stage circuit of the present embodiment is as figure 1 As shown, it includes a differential circuit, a voltage limiting circuit, a common mode coil, a ...

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Abstract

The present invention provides a high-speed, high-precision and high-isolation voltage data acquisition system, which includes a first-stage circuit and a second-stage circuit connected in series; Pass it to the second-level circuit; the second-level circuit converts and isolates the signal and outputs it. The present invention adopts differential acquisition mode, uses high-speed and high-precision serial / parallel AD chips to realize analog / digital conversion, and uses isolation optocoupler to realize safe isolation. The acquisition system not only has the characteristics of high speed and high precision, but also can filter out interference , to achieve high voltage isolation, with a wide range of applications.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a data acquisition system with high speed, high precision and high isolation voltage. Background technique [0002] In recent years, data acquisition and its application technology have attracted more and more attention, and data acquisition systems have been applied rapidly. Traditional high-voltage / high-current data acquisition mostly uses analog isolation. For example, the acquisition of AC voltage / current can be realized through PT / CT isolation, and the acquisition of DC voltage / current can be realized through voltage / current Hall isolation. However, the isolation element is bulky and expensive, especially the voltage / current Hall needs to be powered separately, which is complicated to implement. Contents of the invention [0003] Aiming at the deficiencies of the existing high-voltage / high-current data acquisition technology, the present inventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25G01R15/22
Inventor 訾振宁渠学景张柯许潇刘琳
Owner STATE GRID CORP OF CHINA
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