Power quality monitoring and analysis system

A power quality monitoring and analysis system technology, applied in the direction of measuring electrical variables, using digital measurement technology to measure, measuring electricity, etc., can solve the problems of high price of electric energy detection equipment, failure to meet the collection needs, single function, etc.

Inactive Publication Date: 2018-03-27
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a power quality monitoring and analysis system to solve the problem that the power detection equipment in the prior art is expensive and cannot meet our collection needs, and there are still problems such as single function and poor quality of monitoring and analysis. question

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Embodiment Construction

[0023] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0024] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0025] Such as figure 1 As shown, it is a power quality monitoring and analysis system, including:

[0026] A current transformer 2, a voltage transformer 3, a conditioning unit 1 and a processor unit 4, the current transformer 2 and the voltage transformer 3 are conn...

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Abstract

The invention is applicable to the technical field of power monitoring, and particularly relates to a power quality monitoring and analysis system, which comprises a current transformer, a voltage transformer, a conditioning unit and a processor unit, wherein both the current transformer and the voltage transformer are connected with the conditioning unit; the conditioning unit is connected with the processor unit; the current transformer is used for acquiring three-phase voltage signals; the voltage transformer is used for acquiring three-phase current signals; the conditioning unit is used for carrying out synchronous sampling on the three-phase voltage signals and the three-phase current signals and carrying out A / D conversion and zero crossing comparison on the sampled signals; and theprocessor unit is used for capturing the unit signal rising edge zero crossing point after A / D conversion and zero crossing comparison and measuring the frequency information of the three-phase voltage signals and the three-phase current signals. After the above scheme is adopted, acquisition needs can be met, multiple functions are realized, the price is low, and money is saved.

Description

technical field [0001] The invention belongs to the technical field of power monitoring, and in particular relates to a power quality monitoring and analysis system. Background technique [0002] In modern industrial enterprises and transportation departments, nonlinear power loads are increasing a lot. With the development of electric power and electronic technology, thyristor rectification and commutation technology has been widely used. For example, thyristor rectifier power supplies are widely used in metallurgy, chemical industry and mining departments. , A large number of frequency conversion speed control devices are used in the industry, locomotives powered by AC single-phase rectification in electrified railways, converter stations in high-voltage and large-capacity DC transmission, frequency conversion of household appliances, etc., making the load on the power grid increase sharply. [0003] Harmonic pollution of the power grid has always been a major problem that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R19/25
CPCG01R31/00G01R19/25
Inventor 徐新吴国滨李庆
Owner STATE GRID CORP OF CHINA
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