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Three-phase voltage measurement method, circuit and equipment

A technology of three-phase voltage and measurement circuit, which is applied in the direction of measurement using digital measurement technology, can solve problems such as poor reliability, and achieve the effect of strong measurement reliability

Active Publication Date: 2021-12-17
CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a three-phase voltage measurement method, circuit and equipment for the problem of poor measurement reliability of the traditional three-phase voltage measurement method

Method used

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  • Three-phase voltage measurement method, circuit and equipment
  • Three-phase voltage measurement method, circuit and equipment
  • Three-phase voltage measurement method, circuit and equipment

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Embodiment Construction

[0033] In order to facilitate understanding of the present application, the present application will be further described below with reference to the related drawings. The preferred embodiment of the present application is given. However, the present application can be implemented in many different forms, is not limited to the embodiments described herein. Conversely, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thoroughly.

[0034] See figure 1A three-phase voltage measuring circuit, including: first probe 10 for electrical coupling with three-phase electrical electricity to be tested; second probe 20 for second phase line to be tested three-phase electricity Electrical coupling; third probe 30 for electrical coupling with three-phase electrical electrical coupling to be tested; the strobe device 40, the first input terminal, the second input terminal, and the third input terminal, respectively, respecti...

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Abstract

This application relates to a three-phase voltage measurement method, circuit and equipment. When measuring the voltage of each phase of three-phase electricity, three probes are used to electrically couple with the first phase line, the second phase line and the third phase line respectively. , through the gating function of the gating device, any two-phase line can be connected to the three-phase voltage measurement circuit at the same time. The signal processing device analyzes the aliased signals at both ends of the measured capacitor when any two-phase line is connected, and can obtain corresponding line voltages of the three-phase electricity to be measured. The final signal processing device performs analysis and calculation according to each line voltage to obtain each phase voltage of the three-phase electricity to be measured. The above scheme, when measuring the voltage of each phase, does not need to peel off the insulation layer of the phase wires, and can directly connect each phase wire in the form of electrical coupling, and does not need a neutral wire in the three-phase electricity, just Complete the voltage measurement of each phase of the three-phase electricity to be tested, which has strong measurement reliability.

Description

Technical field [0001] The present application relates to the field of electricity measurement, and in particular, there is a three-phase voltage measurement method, circuitry and equipment. Background technique [0002] Three-phase electrical appliances are widely used in industrial electricity, and most of the AC electrical equipment in the industry, such as electric motors, all of which are powered by three-phase electricity. The three-phase voltage amplitude value is an important parameter reflects the quality of the three-phase electric energy. The voltage is too high may directly damage the electric equipment. The voltage is too low may cause the electrical equipment to work. Therefore, continuous monitoring of three-phase electric voltage is an essential work from the normal operation and personal safety of the equipment. [0003] The traditional three-phase voltage measurement mode mainly has contact voltages measurement and non-contact voltage measurement. Although the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 李鹏骆柏锋田兵张佳明尹旭刘仲王志明吕前程陈仁泽孙宏棣
Owner CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD
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