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Optical waveguide lightning pulse electric field detection device of suppressing piezoelectric interference and method

A technology of pulsed electric field and detection device, applied in the field of optoelectronics

Active Publication Date: 2018-03-02
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0006] The invention provides an optical waveguide lightning pulse electric field detection device and method for suppressing piezoelectric interference, so as to solve the problem of how to accurately detect the electric field

Method used

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  • Optical waveguide lightning pulse electric field detection device of suppressing piezoelectric interference and method
  • Optical waveguide lightning pulse electric field detection device of suppressing piezoelectric interference and method
  • Optical waveguide lightning pulse electric field detection device of suppressing piezoelectric interference and method

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Embodiment approach

[0065] In an embodiment of the present invention, Figure 4 The asymmetric M-Z type used in the optical waveguide structure in 2-2, the specific calculation is as follows:

[0066] Take λ=1.55μm, f(λ)=60.5π, n=2.1395,

[0067]

[0068]

[0069] When ΔL=21.92μm is set, it can be guaranteed by changing the output wavelength λ of the tunable laser:

[0070] n is an integer,

[0071] At this point there are:

[0072]

[0073]

[0074] Among them, P in ,Pout is the input optical power and output optical power of the optical waveguide field sensor; f(λ), f(T, RH) are the effects of light wavelength and temperature and humidity on the functional phase; E, E π ΔL is the length difference between the straight waveguide and the curved waveguide; n is the effective refractive index of the optical waveguide; λ is the wavelength of the laser output signal; α is the attenuation coefficient of the optical waveguide field sensor ; G is the gain coefficient of the photodetec...

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Abstract

The present invention discloses an optical waveguide lightning pulse electric field detection device of suppressing the piezoelectric interference. The device comprises a tunable laser used for generating a laser signal of a preset working wavelength threshold value according to a control instruction of a control module; an optical waveguide electric field sensor used for sensing an electric fieldsignal in a to-be-detected area and outputting an optical signal; an optical fiber coupler used for dividing the optical signal into a first signal and a second signal according to a preset proportion and separately sending to a photoelectric detector and the control module; the photoelectric detector used for converting the first signal into a to-be-detected electric signal; the control module used for sending out the control instruction to the tunable laser according to the second signal, and controlling the wavelength of the laser signal sent out by the tunable laser. According to the present invention, by utilizing the tunable laser, the situation that the optical waveguide electric field sensor always works in a linear area is guaranteed, at the same time, by using the trapezoidal optical waveguide electric field sensor, the interference of the piezoelectric interference to the pulse signal measurement can be suppressed effectively, and an electric field generated by a lightningpulse signal can be measured more accurately.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, and more specifically, to an optical waveguide lightning pulse electric field detection device and method for suppressing piezoelectric interference. Background technique [0002] With the continuous increase of voltage level and the development of ultra-high voltage and ultra-high voltage power transmission and transformation technology, it is of great significance to reasonably design and configure the insulation parameters of various high-voltage electrical equipment to ensure the safe and reliable operation of the power system. At present, the measurement of high-voltage lightning wave pulse electric field basically stays in the stage of simulation calculation, LiNbO 3 The integrated optical waveguide field sensor has the characteristics of low interference to the measured electric field and high dielectric strength, and is suitable for measuring such pulsed electric fields with high ...

Claims

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Application Information

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IPC IPC(8): G01R29/08
CPCG01R29/0871G01R29/0885
Inventor 赵录兴王磊陆德坚崔勇
Owner CHINA ELECTRIC POWER RES INST
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