Distributed all-optical voltage measuring system and measuring method implemented by same

Abstract

The invention discloses a distributed all-optical voltage measuring system and a measuring method implemented by the same. The distributed all-optical voltage measuring system comprises a broadband laser light source, a light amplifier, a light circulator, a transmission fiber, a voltage sensing system, a light splitter, a light selection system, a photoelectric conversion system and an end signaldisplay and processing system. Laser light in certain wavelength ranges can be outputted by the broadband laser light source, power of the light source can be amplified by the light amplifier, amplified light signals can be transmitted into various sensor input ends of the sensing system by the transmission fiber, light signals can be fed by various sensors and can be screened by the light selection system, the light signals fed by the sensors with voltage change can be changed and can be outputted by corresponding channels of the light selection system, output light intensity signals can beconverted into voltage signals by photoelectric detectors, and additional voltage numerical values measured by circuits can be acquired by the aid of the end signal display and processing system. Thedistributed all-optical voltage measuring system and the measuring method have the advantages of passivity, high electromagnetic interference resistance, broad response frequency band and good power frequency response.

Description

technical field [0001] The invention relates to the technical field of power detection, in particular to a distributed all-photovoltage measurement system and a measurement method thereof. Background technique [0002] Real-time measurement of grid voltage is of great significance for system protection, line fault monitoring and measurement. At present, there are many difficulties in realizing the distributed overvoltage voltage sensing of long-distance transmission lines. Most of the existing voltage sensing devices need to install power supply units at the measurement points, and their working reliability cannot be guaranteed in the wild or in harsh environments. ; At the same time, the amount of single voltage data collection is too large, and the use of wireless transmission is not only costly, but once the signal is lost, the data transmission cannot be completed. In addition, due to the limitation of the physical characteristics of the sensor, even if the existing mul...

AI Technical Summary

Problems solved by technology

At present, there are many difficulties in realizing the distributed overvoltage voltage sensing of long-distance transmission lines. Most of the existing voltage sensing devices need to install power supply units at the measurement points, and their working reliability cannot be guaranteed in the wild or in harsh environments. ; At the same time, the amount of single voltage data collection is too large, the use of wireless transmission is not only costly, but once the signal is missing, the data transmission cannot be completed

In addition, due to the limitation of the physical characteristics of the sensor, even if the existing division multiplexing technology still needs to use multiple optical fibers, it is difficult to achieve multi-point distributed voltage acquisition.

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