Three-phase voltage measuring method, circuit and equipment

A three-phase voltage and measurement circuit technology, applied in the field of circuits and equipment, and three-phase voltage measurement methods, can solve problems such as poor reliability and achieve the effect of strong measurement reliability

Active Publication Date: 2021-09-24
CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD
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  • 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 measuring method, circuit and equipment
  • Three-phase voltage measuring method, circuit and equipment
  • Three-phase voltage measuring method, circuit and equipment

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Embodiment Construction

[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0034] see figure 1, a three-phase voltage measurement circuit, comprising: a first probe 10 for electrically coupling with the first phase line of the three-phase electricity to be measured; a second probe 20 for electrically coupling with the second phase line of the three-phase electricity to be measured Electrical coupling; the third probe 30 is used to electrically couple with the third phase line of the three-phase electricity to be...

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Abstract

The invention relates to a three-phase voltage measuring method, circuit and equipment. The method comprises the steps: enabling any two phase lines to be connected to the three-phase voltage measurement circuit at the same time through the gating function of a gating device by utilizing three probes to be electrically coupled with a first phase line, a second phase line and a third phase line respectively when each phase voltage of three-phase power is measured. The signal processing device analyzes the aliasing signals at the two ends of the measuring capacitor when any two phase lines are connected, so that each line voltage of the three-phase power to be measured can be correspondingly obtained. Finally, the signal processing device performs analysis and calculation according to each line voltage to obtain each phase voltage of the to-be-measured three-phase power. According to the scheme, when each phase voltage is measured, the insulation layers of the phase lines do not need to be stripped, each phase line is directly connected in an electrical coupling mode, meanwhile, the three-phase power does not need to be provided with a neutral line, each phase voltage of the three-phase power to be measured can be measured, and high measurement reliability is achieved.

Description

technical field [0001] The present application relates to the technical field of power measurement, in particular to a three-phase voltage measurement method, circuit and equipment. Background technique [0002] Three-phase power is widely used in industrial power consumption. Most of the AC power equipment in the industry, such as motors, are powered by three-phase power. Three-phase voltage amplitude is an important parameter to reflect the quality of three-phase power. If the voltage is too high, it may directly damage the electrical equipment. If the voltage is too low, the electrical equipment may not work properly. Therefore, starting from the normal operation of equipment and personal safety, continuous monitoring of the voltage of the three-phase power is an essential task. [0003] The traditional three-phase voltage measurement methods mainly include contact voltage measurement and non-contact voltage measurement. Although the principle of the contact measurement...

Claims

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Application Information

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Patent Type & Authority Applications(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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