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Intelligent electricity meter capable of analyzing quality of electric energy and method for metering and analyzing quality by using intelligent electricity meter

A technology of power quality and smart meters, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., to avoid damage to electrical equipment

Inactive Publication Date: 2012-07-04
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the intelligent monitoring of power quality is aimed at large-scale users that are likely to affect the power grid, such as the power quality detection of railway substations, and there are relatively few researches on power quality monitoring for ordinary users at home and abroad.

Method used

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  • Intelligent electricity meter capable of analyzing quality of electric energy and method for metering and analyzing quality by using intelligent electricity meter
  • Intelligent electricity meter capable of analyzing quality of electric energy and method for metering and analyzing quality by using intelligent electricity meter
  • Intelligent electricity meter capable of analyzing quality of electric energy and method for metering and analyzing quality by using intelligent electricity meter

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Embodiment

[0038] figure 1 It is shown that a specific embodiment of the present invention is a smart meter that can analyze power quality, and its composition is:

[0039] Both the voltage transformer 1A and the current transformer 1B of the subscriber line are connected to the A / D converter 3 through the low-pass filter amplifier 2;

[0040] The ARM processing chip 4 is also connected with the GSM communication module 7 .

[0041] In this example, the method of using the above-mentioned smart meter capable of analyzing power quality to measure power energy while analyzing power quality includes the following steps:

[0042]A. Data preprocessing: Voltage transformer 1A and current transformer 1B detect the real-time voltage and current signals of the power user's power supply line, and filter and amplify them through the low-pass filter amplifier 2, and then pass through the A / D converter 3 at a rate of 6.4ksps The sampling rate is converted into real-time voltage and current digital ...

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Abstract

The invention discloses an intelligent electricity meter capable of analyzing quality of electric energy and a method for metering and analyzing quality by using the intelligent electricity meter. The intelligent electricity meter is characterized in that: a voltage transformer (1A) and a current transformer (1B) in a user line are connected with an analog / digital (A / D) converter (3) through a low-pass filter amplifier (2); and an ARM processing chip (4) is connected with an external memory (5) and a liquid crystal display (LCD) (6) of the A / D converter (3) simultaneously. The intelligent electricity meter can analyze the quality of the electric energy provided for the user, provide an electric energy quality state report for the user, timely transmit an early warning signal for protecting the electrical equipment to the user, and provide a basis of pricing by different power quality for the electricity market.

Description

technical field [0001] The invention relates to a novel intelligent electric meter which comprehensively evaluates electric energy quality and measures electricity. Background technique [0002] With the rapid development of the national economy, the power load is becoming increasingly complex and diversified, and a large number of loads with impact, nonlinear and unbalanced characteristics cause the deterioration of the power quality of the power grid. The application of a large number of microprocessor devices based on modern computer technology has made more and more industries "sensitive" to power quality. Any disturbance in power quality may have a serious impact on these industries and lead to Huge loss. In order to ensure the safety and stability of the power grid and provide users with high-quality electric energy, a large number of compensation devices must be invested, and the compensation configuration required must be based on real-time power grid parameters. Th...

Claims

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Application Information

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IPC IPC(8): G01R22/10
Inventor 何正友廖凯张桂南王志远林圣
Owner SOUTHWEST JIAOTONG UNIV
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