CN117706283A - Partial discharge optical detection array device based on solar blind avalanche diode - Google Patents
Partial discharge optical detection array device based on solar blind avalanche diode Download PDFInfo
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- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The application provides a partial discharge optical detection array device based on solar blind avalanche diode, which comprises: the optical path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are coupled; the coupling light path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are sequentially connected, and the APD sensor array is arranged between the coupling light path light guide and the multichannel signal amplifying and processing unit; the coupling light path light guide is used for directionally collecting discharge light radiation in a view field and a view field; the APD sensor array is used for collecting ultraviolet light signals in discharge light radiation; the multichannel amplifying and processing unit is used for filtering, amplifying and modulating the ultraviolet light signals so as to enable the multichannel signals of the multichannel amplifying and processing unit to be synchronously and consistently collected and output. The detection array device can realize accurate sensing and multipath signal coupling output of the discharge of the distribution network line, and can be used for realizing qualitative, quantitative and positioning of the discharge.
Description
Technical Field
The application relates to the technical field of partial discharge detection, in particular to a solar blind avalanche diode-based partial discharge optical detection array device.
Background
Partial discharge is a dielectric region non-penetrating discharge, and generates physical signals such as electromagnetic radiation, ultrasonic waves, light, heat, and the like in addition to charge transfer and electric energy loss. Partial discharge refers to an electrical discharge phenomenon in which a partial region of an insulating medium is broken down by an electric field. Certain areas on or in the surface of the insulating medium have uneven insulating strength, which can lead to distortion of the electric field in the areas, and when the electric field strength is larger than the average electric field strength, partial discharge can be possibly caused.
There are many reasons for the generation of partial discharge, and air gaps and bubbles in the medium are one of the reasons, and there are sharp irregularities around the metal conductor and the semiconductor. Because of the low compressive strength, partial discharge is liable to occur under the action of the high-voltage alternating electric field.
The partial discharge phenomenon has short time, small energy and great harm to the motor. In the prior art, the partial discharge detection equipment has the problems of complex structure, inaccurate discharge detection positioning and quantification and the like.
Disclosure of Invention
The application provides a partial discharge optical detection array device based on solar blind avalanche diode for solving the above-mentioned partial discharge detection equipment and having the structure complicacy, discharge detection location ration inaccurate scheduling problem, includes: the optical path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are coupled;
the coupling light path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are sequentially connected, and the APD sensor array is arranged between the coupling light path light guide and the multichannel signal amplifying and processing unit;
the coupling light path light guide is used for directionally collecting discharge light radiation in a view field and a view field;
the APD sensor array is used for collecting ultraviolet light signals in the discharge optical radiation;
the multichannel amplifying and processing unit is used for filtering, amplifying and modulating the ultraviolet light signals so as to enable multichannel signals of the multichannel amplifying and processing unit to be synchronously and consistently collected and output to obtain discharge information.
In one possible implementation, the coupling-path light guide is also used to expand the field of view and the ultra-wide field of view for directional collection of discharge optical radiation.
In one possible implementation, the coupled-path light guide includes a first partial polyhedron and a second partial polyhedron;
the first part polyhedron is of a regular quadrangular frustum structure, and the second part polyhedron is of a regular quadrangular frustum structure;
the bottom surface of the first part polyhedron is equal to the top surface area of the second part polyhedron in an attaching way, and the bottom surface of the second part polyhedron is equal to the top surface area of the APD sensor array.
In one possible implementation, the coupled-path light guide transmittance is greater than or equal to 96%.
In one possible implementation, the APD sensor array includes a plurality of APD sensors;
the plurality of APD sensors are distributed at equal intervals in a two-dimensional mode, wherein the number of the APD sensors in the first dimension is equal to the number of the APD sensors in the second dimension.
In one possible implementation, the APD sensor array response interval is between 200nm and 280nm, and the APD sensor array gain is greater than or equal to 106;
the number of APD sensors in the first dimension and the number of APD sensors in the second dimension are each greater than or equal to 3.
In one possible implementation, the multi-channel amplifying and processing unit includes: the device comprises a quenching unit, a gain unit, a filtering unit and a detection unit, wherein the quenching unit, the gain unit, the filtering unit and the detection unit are sequentially connected;
the quenching unit is used for reducing the amplitude or energy of the ultraviolet light signal;
the gain unit is used for improving the amplitude or energy of the ultraviolet light signal;
the filtering unit is used for removing redundant components and characteristics in the ultraviolet light signal;
the detection unit is used for extracting the required characteristics and information in the ultraviolet light signal.
In one possible implementation, the gain of each channel signal of the multi-channel amplifying and processing unit is greater than or equal to 103, the gain variance is less than or equal to 0.05, the gain dynamic range is greater than or equal to 55dB, and the impulse response time is less than or equal to 40ns.
From the foregoing, the present application provides a partial discharge optical detection array device based on a solar blind avalanche diode, which includes: the optical path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are coupled; the coupling light path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are sequentially connected, and the APD sensor array is arranged between the coupling light path light guide and the multichannel signal amplifying and processing unit; the coupling light path light guide is used for directionally collecting discharge light radiation in a view field and a view field; the APD sensor array is used for collecting ultraviolet light signals in the discharge optical radiation; the multichannel amplifying and processing unit is used for filtering, amplifying and modulating the ultraviolet light signals so as to enable multichannel signals of the multichannel amplifying and processing unit to be synchronously and consistently collected and output. The detection array device can realize accurate sensing and multipath signal coupling output of the discharge of the distribution network line, and can be used for realizing qualitative, quantitative and positioning of the discharge.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the practice of the invention and together with the description, serve to explain the principles of the embodiments of the invention. It is evident that the drawings in the following description are only some embodiments of the implementation of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a partial discharge optical detection array device in a solar blind avalanche diode according to an exemplary embodiment of the present application;
FIG. 2 is a schematic diagram of a coupled optical path light guide and APD sensor array shown in an exemplary embodiment of the present application;
fig. 3 is a schematic structural diagram of a multi-channel signal amplifying and processing unit according to an exemplary embodiment of the present application.
Reference numerals illustrate:
100-coupling an optical path light guide; a 200-APD sensor array; 300-a multichannel signal amplifying and processing unit; 110-a first partial polyhedron; 120-a second partial polyhedron; 210-APD sensor; 310-quenching unit; 320-a gain unit; 330-a filtering unit; 340-detecting unit.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the implementations of embodiments of the invention.
Partial discharge is a dielectric region non-penetrating discharge, and generates physical signals such as electromagnetic radiation, ultrasonic waves, light, heat, and the like in addition to charge transfer and electric energy loss. Partial discharge optical detection shows a number of principle advantages over other methods: 1. the light propagation is not affected by electromagnetic and acoustic interference, and the measurement result has extremely high confidence; 2. the discharge emission spectrum is an essential phenomenon of energy level transition in the discharge process, and the spectrum characteristic can be utilized to carry out mechanism analysis on the discharge; 3. the discharge statistical information and the spectrum characteristic information are combined, so that defect type identification and discharge intensity calculation can be realized simultaneously; 4. by accurately positioning the source of the discharge optical radiation, visual diagnosis of discharge can be realized.
In recent years, with the rapid development of solid silicon photoelectric semiconductor technology, not only the sensitivity, anti-interference performance and working life of the hypersensitive photoelectric sensor are remarkably improved, but also the driving voltage, transposition size and hardware cost of the sensor are greatly reduced. At present, the hypersensitive photoelectric semiconductor technology is applied to the front edge fields of medical imaging, remote sensing and telemetry, laser radar and the like, replaces photosensitive devices such as a traditional vacuum multiplier tube and the like, and becomes a preferred scheme for developing a miniature photoelectric device. Partial discharge photometry will also be newly developed and substantially advanced by means of the hypersensitive photoelectric sensing technology. The practical effects of the invention are mainly as follows: the partial discharge optical detection array device based on the solar blind avalanche diode can realize accurate sensing and multipath signal coupling output of the distribution network line discharge, and can be used for realizing qualitative, quantitative and positioning of the discharge.
Referring to fig. 1, a solar blind avalanche diode-based partial discharge optical detection array device of the present application includes: the optical path light guide 100, the APD sensor array 200, and the multi-channel signal amplifying and processing unit 300 are coupled. The coupling light path light guide 100, the APD sensor array 200 and the multi-channel signal amplifying and processing unit 300 are sequentially connected, and the APD sensor array 200 is disposed between the coupling light path light guide 100 and the multi-channel signal amplifying and processing unit 300.
The coupled-out light guide 100 is used to directionally collect discharge light radiation in the field of view and view. The coupling light path light guide is arranged at the top end of the partial discharge optical detection array device and is used for collecting discharge light radiation in a view field and guaranteeing the detection performance and the orientation performance of the partial discharge optical detection array device. The coupling light path light guide may couple light energy from one light path to an optical element of another light path. The coupled-path light guide 100 is comprised of two or more optical surfaces that are capable of reflecting light from one surface to another, thereby effecting a change in the path of light or the distribution of light energy. The main advantage of the coupled-path light guide 100 is the ability to couple light from one direction to another while maintaining high efficiency and high resolution. In addition, it has compact structure, easy integration and long service life's characteristics.
In the present application, the discharge optical radiation in the fault distribution network line to be detected is collected by the coupling optical path light guide 100, so as to be transferred to the APD sensor array 200.
The APD sensor array 200 is used to collect ultraviolet light signals in discharge optical radiation. The APD sensor array is an array detector based on an avalanche photodiode APD, each pixel is a single-point detection laser pixel, and distance information corresponding to the single-point detection laser pixel can be directly given. APD sensor array 200 can achieve high resolution and high frame rate with lower power consumption and higher reliability. Furthermore, since APD sensor array 200 is a passive device, no external light source is required, which enables it to operate in a variety of harsh environments. The method and the device can be applied to the environment where any distribution network line is located under the condition that partial discharge is detected.
The multi-channel amplifying and processing unit 300 is used for filtering, amplifying and modulating the ultraviolet light signal, so that the multi-channel signals of the multi-channel amplifying and processing unit 300 are synchronously and consistently collected and output to obtain discharge information. The main function of the multi-channel amplifying and processing unit 300 is to amplify, filter, and gain adjust the multiple input signals, so as to facilitate subsequent data acquisition, analysis, or transmission. The internal part of the device is usually composed of a plurality of amplifiers, filters, ADC (analog-to-digital converter) and the like, and the device can be configured and optimized according to different application requirements in the embodiment of the application.
The multi-channel amplifying and processing unit 300 has an advantage in that it can process a plurality of signal inputs at the same time, improving efficiency and accuracy of signal processing. In the embodiment of the application, the multichannel amplifying and processing unit 300 performs multichannel multiple processing on the ultraviolet light signals, and finally couples and outputs the processed multichannel signals, so that the qualitative, quantitative and positioning of partial discharge can be obtained from the processed ultraviolet light signals, and the obtained information is more comprehensive and accurate.
In some embodiments of the present application, the coupled-path light guide 100 is also used to expand the field of view and the ultra-wide field of view for directional collection of discharge optical radiation. The advantage of the coupled light path light guide to expand the field of view is that it can significantly expand the field of view and has a higher resolution and sensitivity. In addition, because it uses optical principles, real-time monitoring and tracking of targets can be achieved.
Specifically, in some embodiments of the present application, referring to FIG. 2, the coupled-path light guide 100 includes a first partial polyhedron 110 and a second partial polyhedron 120; the first part of polyhedron 110 has a regular quadrangular pyramid structure, and the second part of polyhedron 120 has a regular quadrangular pyramid structure. The regular quadrangular frustum structure of the first portion of polyhedron 110 can increase the area for acquiring the electro-optic radiation, thereby realizing the expansion of the field of view and the ultra-wide viewing area for the directional collection of the discharge optical radiation.
The bottom surface of the first partial polyhedron 110 and the top surface of the second partial polyhedron 120 are equal in area and are bonded to each other, and the bottom surface of the second partial polyhedron 120 and the top surface of the APD sensor array 200 are equal in area.
The second portion of the polyhedron 120 is in a regular quadrangular prism structure and has the same area as the top surface of the APD sensor array 200, so that the received electro-optic radiation can be completely transferred to the APD sensor array 200.
In some embodiments of the present application, many factors need to be considered in the design and fabrication of the coupled-path light guide 100, including optical performance, mechanical performance, material selection, and fabrication process, among others. Its design and manufacture requires precise control to ensure the accuracy and efficiency of the light guide. In the present application, the transmittance of the coupling light path light guide 100 is designed to be greater than or equal to 96%, so as to collect the electro-optical radiation as completely as possible.
In some embodiments of the present application, with continued reference to fig. 2, a solar-blind avalanche diode-based partial discharge optical detection array arrangement according to claim 1, characterized in that APD sensor array 200 comprises a plurality of APD sensors 210; the plurality of APD sensors 210 are equally spaced in two dimensions, wherein the number of APD sensors 210 in a first dimension is equal to the number of APD sensors 210 in a second dimension. That is, APD sensor array 200 is distributed in a square shape in this application.
The response range of the APD sensor array 200 is between 200nm and 280nm, and the response range of 200nm and 280nm is wide, and ultraviolet light and partial visible light regions can be covered, so that ultraviolet light signals can be completely collected. The gain of APD sensor array 200 is greater than or equal to 106, and the gain of APD sensor array 200 is the ratio of the output signal to the input signal for each pixel under certain conditions. When the gain of APD sensor array 200 is greater than or equal to 106, then a single photon can be detected so that a significant electrical signal can be generated upon incidence of the photon.
The number of APD sensors 210 in the first dimension and the number of APD sensors 210 in the second dimension are each greater than or equal to 3. So that the APD sensors 210 should be at least 9, and in the case of a large number, higher resolution and higher precision can be realized, and the specific number of APD sensors 210 can be adaptively adjusted according to actual requirements and costs.
In some embodiments of the present application, referring to fig. 3, a multi-channel amplifying and processing unit 300 includes: quenching section 310, gain section 320, filtering section 330 and detecting section 340 are connected in this order, and quenching section 310, gain section 320, filtering section 330 and detecting section 340 are connected in this order. Quenching unit 310 is used to reduce the amplitude or energy of the ultraviolet light signal; the gain unit 320 is used for increasing the amplitude or energy of the ultraviolet light signal; the filtering unit 330 is used for removing redundant components and features in the ultraviolet light signal; the detection unit 340 is used for extracting the required characteristics and information in the ultraviolet light signal.
Therefore, the multi-channel amplifying and processing unit 300 can perform multi-channel and multi-channel processing on the ultraviolet light signal, and finally obtain the required discharge information.
In some embodiments of the present application, the gain of each channel signal of the multi-channel amplifying and processing unit 300 is greater than or equal to 103, the gain variance is less than or equal to 0.05, the gain dynamic range is greater than or equal to 55dB, and the impulse response time is less than or equal to 40ns.
Specifically, the signal gain of each channel is greater than or equal to 103, so that the signal of each channel has enough amplifying or enhancing effect after processing, and the requirements of subsequent processing or application can be met.
Gain variance is a measure of how far each channel gain value deviates from the average gain value during signal processing or amplification. If the gain variance is less than or equal to 0.05, it is indicated that the gain value of each channel is small and relatively stable with respect to the average gain value, which is advantageous for improving the accuracy and reliability of the signal processing.
Gain dynamic range refers to the maximum gain variation that a device or system can withstand when processing a signal. The larger this value, the more amplifying or attenuating the signal the device or system is capable of accommodating, the larger the range of signal variation. Therefore, the multi-channel amplifying and processing unit 300 having a gain dynamic range of 55dB or more can process or accommodate a wide range of signal variations.
An impulse response time of less than or equal to 40 nanoseconds (ns) means that the device or system is able to react quickly and return a response less than or equal to 40 nanoseconds after receiving the impulse signal. In the use scenario of partial discharge detection of the present application, it is desirable that the multi-channel amplifying and processing unit 300 be able to quickly receive and process signals in order to make an accurate response in a short time.
The above numerical limitation requirements can further improve the efficiency and accuracy of signal processing, and improve the quality and reliability of signals.
As can be seen from the foregoing embodiments, the present application provides a partial discharge optical detection array device based on a solar blind avalanche diode, which includes: the optical path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are coupled; the coupling light path light guide, the APD sensor array and the multichannel signal amplifying and processing unit are sequentially connected, and the APD sensor array is arranged between the coupling light path light guide and the multichannel signal amplifying and processing unit; the coupling light path light guide is used for directionally collecting discharge light radiation in a view field and a view field; the APD sensor array is used for collecting ultraviolet light signals in discharge light radiation; the multichannel amplifying and processing unit is used for filtering, amplifying and modulating the ultraviolet light signals so as to enable the multichannel signals of the multichannel amplifying and processing unit to be synchronously and consistently collected and output. The detection array device can realize accurate sensing and multipath signal coupling output of the discharge of the distribution network line, and can be used for realizing qualitative, quantitative and positioning of the discharge.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (8)
1. A solar blind avalanche diode-based partial discharge optical detection array device, comprising: a coupling optical path light guide (100), an APD sensor array (200) and a multichannel signal amplifying and processing unit (300);
the coupling light path light guide (100), the APD sensor array (200) and the multichannel signal amplifying and processing unit (300) are sequentially connected, and the APD sensor array (200) is arranged between the coupling light path light guide (100) and the multichannel signal amplifying and processing unit (300);
the coupling light path light guide (100) is used for directionally collecting discharge light radiation in a view field and a view field;
the APD sensor array (200) is configured to collect ultraviolet light signals in the discharge optical radiation;
the multichannel amplifying and processing unit (300) is used for filtering, amplifying and modulating the ultraviolet light signals so as to enable the multichannel signals of the multichannel amplifying and processing unit (300) to be synchronously and consistently collected and output to obtain discharge information.
2. The solar-blind avalanche diode-based partial discharge optical detection array device of claim 1, wherein said coupling-path light guide (100) is further configured to expand the field of view and the ultra-wide field of view for directional collection of discharge optical radiation.
3. The solar-blind avalanche diode-based partial discharge optical detection array arrangement according to claim 1, wherein said coupling-path light guide (100) comprises a first partial polyhedron (110) and a second partial polyhedron (120);
the first part polyhedron (110) is of a regular quadrangular prism structure, and the second part polyhedron (120) is of a regular quadrangular prism structure;
the bottom surface of the first part polyhedron (110) is equal to the top surface area of the second part polyhedron (120) and is mutually attached, and the bottom surface of the second part polyhedron (120) is equal to the top surface area of the APD sensor array (200).
4. A solar-blind avalanche diode based partial discharge optical detection array arrangement according to any of claims 1-3, wherein said coupling light path light guide (100) has a transmittance of 96% or more.
5. The solar-blind avalanche diode-based partial discharge optical detection array arrangement of claim 1, wherein said APD sensor array (200) comprises a plurality of APD sensors (210);
the plurality of APD sensors (210) are distributed at equal intervals in a two-dimensional mode, wherein the number of the APD sensors (210) in the first dimension is equal to the number of the APD sensors (210) in the second dimension.
6. The solar-blind avalanche diode-based partial discharge optical detection array device according to claim 5, wherein said APD sensor array (200) response interval is located between 200nm and 280nm, said APD sensor array (200) gain being greater than or equal to 106;
the number of APD sensors (210) in the first dimension and the number of APD sensors (210) in the second dimension are each greater than or equal to 3.
7. The solar-blind avalanche diode-based partial discharge optical detection array device according to claim 5, wherein said multichannel amplifying and processing unit (300) comprises: the device comprises a quenching unit (310), a gain unit (320), a filtering unit (330) and a detection unit (340), wherein the quenching unit (310), the gain unit (320), the filtering unit (330) and the detection unit (340) are sequentially connected;
-the quenching unit (310) is configured to reduce the amplitude or energy of the ultraviolet light signal;
-the gain unit (320) is configured to increase the amplitude or energy of the ultraviolet light signal;
-the filtering unit (330) is configured to remove unwanted components and features from the uv signal;
the detection unit (340) is used for extracting the required characteristics and information in the ultraviolet light signal.
8. The solar-blind avalanche diode-based partial discharge optical detection array device according to claim 7, wherein each channel signal gain of said multi-channel amplifying and processing unit (300) is greater than or equal to 103, gain variance is less than or equal to 0.05, gain dynamic range is greater than or equal to 55dB, and impulse response time is less than or equal to 40ns.
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|---|---|
| CN (1) | CN117706283A (en) |
-
2023
- 2023-10-31 CN CN202311428323.6A patent/CN117706283A/en active Pending
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