Voltage measuring device and method based on piezoelectric ceramic micro-deformation image detection

Abstract

The invention discloses a voltage measuring device and method based on piezoelectric ceramic micro-deformation image detection, and relates to the technical field of electric power detection. The problems of unreliable operation and low price when the voltage is measured by adopting an existing OVT technology are solved. The voltage measuring device disclosed by the invention comprises a backlight unit, an acquisition unit and a piezoelectric ceramic module, wherein the backlight unit is arranged on one side of the piezoelectric ceramic module; the acquisition unit is arranged on the other side of the piezoelectric ceramic module; and a detachable piezoelectric ceramic piece, electrodes and a base are arranged on the piezoelectric ceramic module, and the electrodes are arranged at the upper end and the lower end of the piezoelectric ceramic piece. According to the voltage measuring device, the inverse piezoelectric effect of the piezoelectric ceramic is utilized, an image recognition module based on the micro-deformation of the piezoelectric ceramic is adopted, a non-contact image sensor replaces a high-cost mechanical sensor, an image processing technology is combined, the micro-deformation projection area of the piezoelectric ceramic piece after being electrified is calculated, and then the high-precision measurement of the direct-current voltage is realized. The voltage measuring device has the advantages of low cost, high accuracy, strong stability and the like, and meets the requirement of an intelligent power grid on equipment digitization.

Description

technical field [0001] The invention relates to the technical field of power detection, in particular to a voltage measurement device and method based on piezoelectric ceramic micro-deformation image detection. Background technique [0002] As a large-capacity, long-distance power transmission technology, HVDC transmission has played an important role in the promotion of the Global Energy Internet. With the development of my country's smart grid and the application and promotion of high-voltage flexible DC power transmission and large-scale wind farm grid-connected technologies, the control and protection of flexible DC systems require faster and more accurate responses. Therefore, the corresponding high-voltage DC current and voltage measurement devices need With high reliability, high speed, high precision and other characteristics. The measurement of high-voltage DC voltage is the basis for the extensive promotion of smart grid and DC transmission, and an important prereq...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems existing in the prior art, the present invention provides a voltage measurement device and method based on piezoelectric ceramic micro-deformation image detection, which solves the problems of unreliable operation and low price when the existing OVT technology measures voltage

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