Voltage measurement system based on inverse piezoelectric effect

A technology of inverse piezoelectric effect and voltage measurement, applied in the direction of measuring current/voltage, measuring device, measuring only voltage, etc., can solve problems such as electromagnetic interference, inaccurate measurement of grid voltage, and deviation, and achieve improved accuracy, no problem. The effect of easy electromagnetic interference

Inactive Publication Date: 2021-05-14
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Application Information

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Problems solved by technology

Among them, the use of electrical signals for transmission or calculation is susceptible to external electromagnetic interference, which may cause deviations in the process of transmission or calculation of electrical signals, resulting in inaccurate measurement of grid voltage

Method used

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  • Voltage measurement system based on inverse piezoelectric effect
  • Voltage measurement system based on inverse piezoelectric effect

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Embodiment Construction

[0034] The core of the present invention is to provide a voltage measurement system based on the inverse piezoelectric effect. The piezoelectric ceramic sheet and the light source module in this application can realize the measurement of the voltage to be measured based on the optical signal, and the optical signal is not easily affected by the optical signal when it is transmitted through the optical fiber. Electromagnetic interference improves the accuracy of measuring grid voltage.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embo...

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Abstract

The invention discloses a voltage measurement system based on an inverse piezoelectric effect. The system comprises a light source module, a voltage dividing module, a piezoelectric ceramic piece and a signal processing module, power grid voltage is applied to the voltage dividing module, then the voltage dividing module reduces the power grid voltage to be within the voltage range capable of being borne by the piezoelectric ceramic piece, through the inverse piezoelectric effect of the piezoelectric ceramic piece, the piezoelectric ceramic piece deforms under the action of the voltage to be measured, a certain deformation quantity corresponds to a corresponding voltage value, then the deformation quantity of the piezoelectric ceramic piece is detected by using a first optical signal output by the light source module, a second optical signal is obtained, and the intensity of the voltage to be measured is calculated. And the intensity is multiplied by the voltage division ratio of the voltage division module, so that the voltage of the power grid can be measured. Therefore, the piezoelectric ceramic piece and the light source module can measure the voltage to be measured based on the optical signal, the optical signal is not prone to electromagnetic interference when transmitted through the optical fiber, and the accuracy of measuring the voltage of the power grid is improved.

Description

technical field [0001] The invention relates to the field of voltage measurement, in particular to a voltage measurement system based on the inverse piezoelectric effect. Background technique [0002] The way to measure the grid voltage in the prior art is usually to step down the grid voltage through a voltage divider module composed of resistors and / or capacitors, and then calculate the grid voltage of the electrical signal according to the voltage signal output by the voltage divider module. The grid voltage of the electrical signal is transmitted to the remote monitoring equipment through the cable. Among them, the use of electrical signals for transmission or calculation is susceptible to external electromagnetic interference, which may cause deviations in the process of transmission or calculation of electrical signals, resulting in inaccurate measurement of grid voltage. Contents of the invention [0003] The purpose of the present invention is to provide a voltage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/22
CPCG01R15/22G01R19/0084
Inventor 肖勇翟少磊罗奕魏龄钱斌王恩胡珊珊张林山王典浪陈叶王保帅
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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