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CN-224203285-U - High-voltage measurement light intensity self-adaptive compensation photoelectric isolation system

CN224203285UCN 224203285 UCN224203285 UCN 224203285UCN-224203285-U

Abstract

The utility model discloses a light intensity self-adaptive compensation photoelectric isolation system for high-voltage measurement, which comprises a photoelectric isolation unit electrically connected between a high-voltage side and a low-voltage side, wherein the high-voltage side and the low-voltage side are electrically isolated through electric-optical-electric conversion; the photoelectric isolation unit is characterized by comprising a photoelectric isolator, wherein a light intensity detection sensor and a light intensity enhancement component are arranged between a light emitting source and a photosensitive device of the photoelectric isolator, and the light intensity enhancement component is started to enhance the light intensity when the light intensity detection sensor detects that the light intensity is weakened so as to reduce photoelectric conversion errors. The utility model effectively suppresses the nonlinear error of photoelectric conversion caused by light path loss or device aging by detecting the light intensity attenuation in real time and triggering dynamic light compensation, thereby obviously improving the precision of high-voltage isolation measurement.

Inventors

  • HE SHAOHUA
  • LIU CAN
  • ZHANG JIANGWEN
  • LIU YUTAO
  • WANG SONG
  • ZHANG YUNXIA

Assignees

  • 西安孚信能源工程有限公司

Dates

Publication Date
20260505
Application Date
20250513

Claims (8)

  1. 1. The light intensity self-adaptive compensation photoelectric isolation system for high voltage measurement comprises a photoelectric isolation unit (1) electrically connected between a high voltage side (a) and a low voltage side (b), and the photoelectric isolation unit (1) is used for realizing electric isolation between the high voltage side (a) and the low voltage side (b) through electric-optical-electric conversion, and is characterized in that the photoelectric isolation unit (1) comprises a photoelectric isolator (2), a light intensity detection sensor (2.3) and a light intensity enhancement component (2.4) are arranged between a light emitting source (2.1) and a photosensitive device (2.2) of the photoelectric isolator (2), and the light intensity enhancement component (2.4) is started to enhance the light intensity when the light intensity detection sensor (2.3) detects that the light intensity is weakened so as to reduce photoelectric conversion errors.
  2. 2. The high-voltage measured light intensity adaptive compensation photoelectric isolation system according to claim 1, wherein the response wavelength range of the light intensity detection sensor (2.3) is matched with the light wavelength emitted by the light emitting source (2.1).
  3. 3. The high-voltage measured light intensity adaptive compensation photo-isolation system of claim 1, wherein the set position of the light intensity enhancement means (2.4) is located after the set position of the light intensity detection sensor (2.3).
  4. 4. A high-voltage measured light intensity adaptive compensation optoelectronic isolation system as claimed in claim 3, wherein said light intensity detection sensor (2.3) is laterally disposed with respect to the light source (2.1) and the photosensitive device (2.2) and measures the intensity of light using scattered light.
  5. 5. The high-voltage measured light intensity adaptive compensation photoelectric isolation system as set forth in claim 4, wherein the number of the light intensity detection sensors (2.3) is two, one light intensity detection sensor (2.3) is arranged close to the light emitting source (2.1), and the other light intensity detection sensor (2.3) is arranged close to the photosensitive device (2.2).
  6. 6. The high-voltage measured light intensity adaptive compensation optoelectronic isolation system of claim 1, wherein said light intensity enhancement component (2.4) is an optical amplifier.
  7. 7. The high-voltage measured light intensity adaptive compensation photo-isolation system of claim 6, wherein said optical amplifier is disposed in the optical path between the light emitting source (2.1) and the photosensitive device (2.2).
  8. 8. The high voltage measured light intensity adaptive compensation photo-isolation system of claim 6 or 7, comprising a PID controller (3) corresponding to an optical amplifier, said PID controller (3) being adapted to adjust the gain of said optical amplifier.

Description

High-voltage measurement light intensity self-adaptive compensation photoelectric isolation system Technical Field The utility model belongs to the technical field of high-voltage measurement, and particularly relates to a light intensity self-adaptive compensation photoelectric isolation system for high-voltage measurement. Background The existing photoelectric isolation device generally adopts a photoelectric conversion architecture with a fixed driving mode, and an output signal of the photoelectric isolation device is easily interfered by multiple factors such as aging of a luminous source, light path pollution, temperature drift and the like. Although some schemes release performance attenuation through temperature compensation circuits or redundant designs, real-time correction cannot be implemented for light path intensity change, and the traditional open-loop control mode exposes light attenuation compensation hysteresis in long-term operation, so that nonlinear errors still exist in a high-precision measurement scene. Disclosure of Invention The utility model aims to: in order to overcome the defects in the prior art, the utility model provides the light intensity self-adaptive compensation photoelectric isolation system for high-voltage measurement, which effectively inhibits the nonlinear error of photoelectric conversion caused by light path loss or device aging and improves the precision of high-voltage isolation measurement by detecting the light intensity attenuation in real time and triggering dynamic light compensation. The light intensity self-adaptive compensation photoelectric isolation system for high-voltage measurement comprises a photoelectric isolation unit electrically connected between a high-voltage side and a low-voltage side, wherein the photoelectric isolation unit is used for realizing electric isolation between the high-voltage side and the low-voltage side through electric-optical-electric conversion, the photoelectric isolation unit comprises a photoelectric isolator, a light intensity detection sensor and a light intensity enhancement component are arranged between a light emitting source and a photosensitive device of the photoelectric isolator, and the light intensity enhancement component is started to enhance the light intensity when the light intensity detection sensor detects that the light intensity is weakened so as to reduce photoelectric conversion errors. Further, the response wavelength range of the light intensity detection sensor is matched with the wavelength of light emitted by the light emitting source. Further, the setting position of the light intensity enhancing member is located after the setting position of the light intensity detecting sensor. Further, the light intensity detection sensor is laterally arranged relative to the light emitting source and the photosensor, and measures the light intensity by using scattered light. Further, the number of the light intensity detection sensors is two, wherein one light intensity detection sensor is arranged close to the light emitting source, and the other light intensity detection sensor is arranged close to the photosensitive device. Further, the light intensity enhancing member is an optical amplifier. Further, the optical amplifier is disposed in the optical path between the light emitting source and the photosensitive device. Further, a PID controller corresponding to the optical amplifier is included, the PID controller being configured to adjust a gain of the optical amplifier. The utility model has the beneficial effects that the light intensity detection sensor and the light intensity enhancement component are additionally arranged in the photoelectric isolator to form a closed-loop compensation structure system, so that the light intensity attenuation can be detected in real time and a dynamic light compensation mechanism can be triggered, and the nonlinear error of photoelectric conversion caused by light path loss or device aging can be effectively restrained, thereby obviously improving the long-term precision stability of the high-voltage isolation measurement system. Drawings Fig. 1 is a schematic diagram of the overall structure of the present utility model. Detailed Description The utility model will be further described with reference to the accompanying drawings. As shown in fig. 1, the light intensity self-adaptive compensation photoelectric isolation system for high voltage measurement comprises a photoelectric isolation unit 1 electrically connected between a high voltage side a and a low voltage side b, wherein the photoelectric isolation unit 1 realizes electric isolation of the high voltage side a and the low voltage side b through electric-optical-electric conversion, the photoelectric isolation unit 1 comprises a photoelectric isolator 2, a light intensity detection sensor 2.3 and a light intensity enhancement component 2.4 are arranged between a light emitting source 2.1 and a ph