CN110888027A - Sensor for detecting discharge of ring main unit - Google Patents
Sensor for detecting discharge of ring main unit Download PDFInfo
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- CN110888027A CN110888027A CN201911222902.9A CN201911222902A CN110888027A CN 110888027 A CN110888027 A CN 110888027A CN 201911222902 A CN201911222902 A CN 201911222902A CN 110888027 A CN110888027 A CN 110888027A
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- ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- 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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Abstract
The application relates to a sensor for detecting looped netowrk cabinet discharges, the sensor includes: and the optical processing module is used for filtering optical signals in the ring main unit, acquiring ultraviolet light signals and infrared light signals, carrying out sensitization processing on the ultraviolet light signals and the infrared light signals, and acquiring the ultraviolet light signals and the infrared light signals after sensitization processing. And the data processing module is used for carrying out digital-to-analog conversion on the ultraviolet light signal and the infrared light signal after the light processing module is subjected to the light sensing processing so as to obtain a digital signal of the ultraviolet light signal and a digital signal of the infrared light signal after the light sensing processing. And the accommodating component is used for accommodating the optical processing module and the data processing module. The technical scheme that this application provided, when the looped netowrk cabinet discharges, can detect the ultraviolet ray in the discharged early stage of looped netowrk cabinet, detect infrared light signal in the discharged later stage of looped netowrk cabinet, very big improvement is to the accuracy that the looped netowrk cabinet judged that discharges.
Description
Technical Field
The invention relates to the field of electrical equipment detection, in particular to a sensor for detecting discharge of a ring main unit.
Background
The ring main unit is an electrical device capable of improving power supply performance, and has the advantages of simple structure, small size, low price and the like. Therefore, the ring main unit is widely applied to various scenes such as urban residential districts, high-rise buildings, large public buildings and the like. However, the inside of the ring main unit is often subjected to a corona discharge phenomenon due to the fact that the electric insulation distance is shortened due to overlarge humidity. Ozone is generated during the discharge process, further corroding the surface of the insulating part, causing more serious electric field distortion, thereby accelerating the discharge and the aging of the equipment. The short circuit to ground can be produced to the later stage in the process of discharging, causes looped netowrk cabinet burning explosion. Therefore, extensive scholars have conducted intensive research on the discharge phenomenon of the ring main unit, and found that visible arc light can be generated by discharge. Once the arc discharge phenomenon is generated, short circuit of the ring main unit to the ground can occur in the following 200mS, and even combustion explosion can occur.
The existing discharge detection device of the ring main unit is an arc light detection device. However, the glass of the ring main unit generally transmits some visible light to enter, and the interference on the isolated light detection is easy to be caused. Therefore, the false alarm rate of the conventional discharge detection device of the ring main unit is high.
Disclosure of Invention
Therefore, it is necessary to provide a sensor capable of improving the accuracy of discharge detection of the ring main unit, aiming at the problem of high false alarm rate of the discharge detection device of the ring main unit.
A sensor for detecting electrical discharge from a ring main unit, the sensor comprising:
the optical processing module is used for filtering optical signals in the ring main unit to obtain ultraviolet light signals and infrared light signals, and carrying out sensitization processing on the ultraviolet light signals and the infrared light signals to obtain the ultraviolet light signals and the infrared light signals after sensitization processing;
the data processing module is used for carrying out digital-to-analog conversion on the ultraviolet light signal and the infrared light signal after the light processing module is subjected to the light sensing processing so as to obtain a digital signal of the ultraviolet light signal and a digital signal of the infrared light signal after the light sensing processing;
and the accommodating component is used for accommodating the optical processing module and the data processing module.
In one embodiment thereof, the light processing module comprises:
the ultraviolet light filter is used for filtering the optical signals in the ring main unit to obtain ultraviolet light signals;
the first photosensitive chip is used for carrying out photosensitive processing on the ultraviolet light signal acquired by the ultraviolet light filter;
the infrared light filter is used for filtering the optical signals in the ring main unit to acquire infrared light signals;
and the second photosensitive chip is used for carrying out photosensitive processing on the infrared light signal acquired by the infrared light filter.
In one embodiment, the accommodating part comprises a shell and an accommodating space surrounded by the shell, and the ultraviolet light filter and the infrared light filter penetrate through the surface of the shell;
the first photosensitive chip and the second photosensitive chip are arranged in the accommodating space, the ultraviolet light filter and the first photosensitive chip are correspondingly arranged, and the infrared light filter and the second photosensitive chip are correspondingly arranged.
In one embodiment, the central optical axis of the ultraviolet light filter and the central optical axis of the first photosensitive chip are coincident;
and the central optical axis of the infrared optical filter is superposed with the central optical axis of the second photosensitive chip.
In one embodiment, the number of the first photosensitive chips is the same as that of the ultraviolet light filters;
the number of the infrared light filters is the same as that of the second photosensitive chips.
In one embodiment, the optical axis of the ultraviolet light filter is parallel to the optical axis of the infrared light filter.
In one embodiment, the peak wavelength of the ultraviolet light filter is 365nm, and the bandwidth is 10 nm;
the peak wavelength of the infrared light filter is 760nm, and the bandwidth is 10 nm.
In one embodiment, the first photosensitive chip and the second photosensitive chip have a sensitive wavelength of 300nm-780 nm.
In one embodiment, the data processing module comprises:
the data reading circuit is used for converting the optical signal after the photosensitive processing of the optical processing module into an analog signal;
and the double-channel data acquisition circuit is connected with the data reading circuit and is used for acquiring the analog signals output by the data reading circuit and converting the analog signals into digital signals.
In one embodiment thereof, the sensor further comprises:
and the supporting column is arranged inside the accommodating part and is used for supporting the data processing module.
In one embodiment, the support posts are copper posts.
The embodiment of the application provides a sensor for detecting looped netowrk cabinet discharges, the sensor includes: the device comprises a light processing module, a data processing module and an accommodating component. The optical processing module is used for filtering optical signals in the ring main unit, acquiring ultraviolet light signals and infrared light signals, and carrying out sensitization processing on the ultraviolet light signals and the infrared light signals to acquire the optical signals after sensitization processing. And the data processing module is used for performing digital-to-analog conversion on the optical signal subjected to the photosensitive processing by the optical processing module to acquire a digital signal of the ultraviolet light signal and a digital signal of the infrared light signal subjected to the photosensitive processing. The accommodating component is used for accommodating the optical processing module and the data processing module. Based on the technical scheme that this application provided, can detect the ultraviolet ray in the early stage of looped netowrk cabinet discharge, detect infrared light signal in the later stage of looped netowrk cabinet discharge. Because the ultraviolet ray can not see through the glass of looped netowrk cabinet, consequently, a period of time after the sensor of this application detected the ultraviolet ray, detects the infrared light again, can conclude that this infrared light is because looped netowrk cabinet discharges and leads to. Therefore, the accuracy of discharge judgment of the ring main unit can be greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a sensor for detecting discharge of a ring main unit according to an embodiment of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The ring main unit can generate light waves with wave bands of 300nm-780nm in the discharging process. Ultraviolet light of 300nm-380nm is generated in the early stage of discharge. As the discharge progresses, it evolves into an arc discharge. In the arc discharge process, the infrared light wave has a large proportion, and the process is generally called an arc discharge stage. The discharge typically takes hours or even days and months from the initial generation of uv light to the late arcing failure. The existing arc light detection device generally detects arc light through a visible light wave band. However, as the switch cabinet generally can transmit some visible light, it is difficult to distinguish whether the arc light detection device detects the visible light transmitted from the outside of the switch cabinet or the visible light generated by the discharge of the ring main unit. Therefore, the false alarm rate is high. Based on the above research, as shown in fig. 1, an embodiment of the present application provides a sensor for detecting discharge of a ring main unit. The sensor includes: a light processing module 10, a data processing module 20 and a housing part 30. The optical processing module 10 is configured to perform filtering processing on an optical signal in the ring main unit to obtain an ultraviolet light signal and an infrared light signal, perform sensitization processing on the ultraviolet light signal and the infrared light signal, and obtain the ultraviolet light signal and the infrared light signal after sensitization processing. The data processing module 20 is configured to perform digital-to-analog conversion on the ultraviolet light signal and the infrared light signal after the light processing module 10 is subjected to the light sensing processing, and obtain a digital signal of the ultraviolet light signal and a digital signal of the infrared light signal after the light sensing processing. The accommodating part 30 is used for accommodating the light processing module 10 and the data processing module 20.
Specifically, the filtering process is to filter the optical signal passing through the optical processing module 10 according to the wavelength of the optical signal, so as to obtain a desired optical signal. In addition, in this embodiment, the digital signal obtained after the processing by the data processing module 20 may be sent to the monitoring device in an RS485 mode for the monitoring personnel to check. In the embodiment, the ultraviolet signal is detected in the early stage of the discharge of the ring main unit, so that the ring main unit can be accurately judged to have generated the early stage discharge. With the increase of the discharge, the infrared light signal is detected after a period of time. At this time, it can be determined that the infrared light signal is caused by discharge of the ring main unit, but not by visible light outside the ring main unit. The visible light outside the cabinet includes, but is not limited to, light generated when a lighter is used, light generated when the lighter is turned on, lightning, and the like. Therefore, the technical scheme provided by the embodiment can greatly improve the accurate determination of the discharge judgment of the ring main unit.
In one embodiment, the light processing module 10 includes: an ultraviolet filter 110, a first photosensitive chip 120, an infrared filter 130, and a second photosensitive chip 140. The ultraviolet light filter 110 is configured to filter an optical signal in the ring main unit to obtain an ultraviolet light signal.
Specifically, the number of the uv filters 110 is at least 1. The number of the first photosensitive chips 120 is the same as that of the ultraviolet light filters 110. The number of ir pass filters 130 is at least 1. The number of the second photosensitive chips 140 is the same as that of the ir pass filter 130. The filter in the embodiment can be an interference coating filter. The optical filter in the embodiment can be replaced by a filter, a filter band and other devices capable of realizing corresponding filtering functions. Through the cooperation of the optical filter and the photosensitive chip, the ultraviolet light signal and the infrared light signal after photosensitive treatment can be acquired for subsequent modules to process.
In one embodiment, the accommodating part 30 includes a housing and an accommodating space surrounded by the housing, and the ultraviolet light filter 110 and the infrared light filter 130 are disposed on a surface of the housing in a penetrating manner. The first photosensitive chip 120 and the second photosensitive chip 140 are disposed in the accommodating space, the ultraviolet filter 110 is disposed corresponding to the first photosensitive chip 120, and the infrared filter 130 is disposed corresponding to the second photosensitive chip 140.
Preferably, the accommodating part 30 is in a square or rectangular parallelepiped shape or other shapes convenient for being placed in the ring main unit.
Specifically, in this embodiment, the ultraviolet filter 110, the first photosensitive chip 120, the infrared filter 130, and the second photosensitive chip 140 are packaged in a containing component, so that the volume of the sensor is significantly reduced. The installation in narrow and small looped netowrk cabinet is favorable to, is favorable to ensureing electrical insulation safety. Moreover, the ultraviolet light filter 110, the first photosensitive chip 120, the infrared light filter 130 and the second photosensitive chip 140 are packaged in one accommodating component, so that the positions of the components can be fixed, and the sensor can work more conveniently.
In one embodiment, the central optical axis of the uv filter 110 coincides with the central optical axis of the first photosensitive chip 120. The central optical axis of the ir pass filter 130 coincides with the central optical axis of the second photo sensor chip 140. Through the arrangement, the filter surface of the filter and the photosensitive surface of the photosensitive chip can fully play corresponding roles, and partial areas of the filter and/or the photosensitive chip cannot be laid.
In one embodiment, the optical axis of the uv filter 110 is parallel to the optical axis of the ir filter 130.
In one embodiment, the uv filter 110 has a peak wavelength of 365nm and a bandwidth of 10 nm. In this embodiment, the ultraviolet light signal emitted by the discharge of the ring main unit and received by the filtering surface of the ultraviolet light filter 110 can pass through the ultraviolet light filter 110 to reach the first photosensitive chip 120. The infrared optical filter 130 has a peak wavelength of 760nm and a bandwidth of 10 nm. In this embodiment, the infrared signal emitted by the ring main unit after being discharged by the ring main unit is received by the filtering surface of the infrared optical filter 130 can pass through the infrared optical filter 130 to reach the second photosensitive chip 140. The sensitive wavelength of the first photosensitive chip 120 and the second photosensitive chip 140 is 300nm to 780 nm. In this embodiment, the sensitive wavelength of the first photosensitive chip 120 is preferably 365 nm. The sensitive wavelength of the second photosensitive chip 140 is preferably 760 nm. The light sensing units of the first light sensing chip 120 and the second light sensing chip 140 may be avalanche diodes.
In one embodiment, the data processing module 20 includes: a data readout circuit 210 and a dual channel data acquisition circuit 220. The data readout circuit 210 is configured to convert the optical signal after the light processing module 10 is subjected to the light processing into an analog signal. The time for the data readout circuit 210 to convert the optical signal after the light processing module 10 is exposed to light into an analog signal may be controlled within 10 microseconds. The dual-channel data acquisition circuit 220 and the first photosensitive chip 120 and the second photosensitive chip 140 in the light processing module 10 may be connected by means of ICs.
In one embodiment, the dual-channel data acquisition circuit 220 is connected to the data readout circuit 210, and is configured to acquire the analog signal output by the data readout circuit 210 and convert the analog signal into a digital signal. The time for the dual-channel data acquisition circuit 220 to convert the analog signal into a digital signal can be controlled within 200 microseconds.
In one embodiment thereof, the sensor further comprises: a support column 40 disposed inside the accommodating part 30, wherein the support column 40 is used for supporting the data processing module 20. In this embodiment, the number of the supporting columns 40 is preferably set to 4, or other numbers that are advantageous for supporting the data processing module 20. The material of the support posts 40 is preferably copper.
Utilize the sensor that the embodiment of this application provided, can remind the operation and maintenance personnel to notice the discharge phenomenon of looped netowrk cabinet. The ring main unit can output signals at the initial stage of arc discharge generated by the discharge of the ring main unit, so that operation and maintenance personnel can cut off the circuit in time, and the ring main unit is ensured not to generate the phenomenon of combustion and explosion.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A sensor for detecting discharge of a ring main unit, the sensor comprising:
the optical processing module (10) is used for filtering optical signals in the ring main unit to obtain ultraviolet light signals and infrared light signals, and carrying out sensitization processing on the ultraviolet light signals and the infrared light signals to obtain the ultraviolet light signals and the infrared light signals after sensitization processing;
the data processing module (20) is used for performing digital-to-analog conversion on the ultraviolet light signal and the infrared light signal subjected to the photosensitive processing by the light processing module (10) to obtain a digital signal of the ultraviolet light signal and a digital signal of the infrared light signal subjected to the photosensitive processing;
a receiving part (30) for receiving the light processing module (10) and the data processing module (20).
2. Sensor according to claim 1, characterized in that the light processing module (10) comprises:
the ultraviolet light filter (110) is used for filtering the optical signals in the ring main unit to obtain ultraviolet light signals;
the first photosensitive chip (120) is used for performing photosensitive processing on the ultraviolet light signals acquired by the ultraviolet light filter (110);
the infrared optical filter (130) is used for filtering optical signals in the ring main unit to obtain infrared optical signals;
and the second photosensitive chip (140) is used for carrying out photosensitive processing on the infrared light signal acquired by the infrared light filter (130).
3. The sensor according to claim 2, wherein the housing member (30) includes a housing and a housing space surrounded by the housing, and the ultraviolet light filter (110) and the infrared light filter (130) are penetratingly disposed on a surface of the housing;
the first photosensitive chip (120) and the second photosensitive chip (140) are arranged in the accommodating space, the ultraviolet light filter (110) and the first photosensitive chip (120) are arranged correspondingly, and the infrared light filter (130) and the second photosensitive chip (140) are arranged correspondingly.
4. The sensor according to claim 2, wherein a central optical axis of the ultraviolet light filter (110) and a central optical axis of the first photo-sensitive chip (120) coincide;
the central optical axis of the infrared optical filter (130) is coincident with the central optical axis of the second photosensitive chip (140).
5. The sensor according to claim 2, wherein the number of the first photosensitive chips (120) is the same as the number of the ultraviolet light filters (110);
the number of the infrared optical filters (130) is the same as that of the second photosensitive chips (140).
6. A sensor according to claim 2, wherein the optical axis of the uv filter (110) is parallel to the optical axis of the ir filter (130).
7. A sensor according to claim 2, wherein the uv filter (110) has a peak wavelength of 365nm and a bandwidth of 10 nm;
the peak wavelength of the infrared light filter (130) is 760nm, and the bandwidth is 10 nm.
8. The sensor according to claim 2, characterized in that the first photosensitive chip (120) and the second photosensitive chip (140) have a sensitive wavelength of 300nm-780 nm.
9. The sensor according to claim 1, characterized in that the data processing module (20) comprises:
the data reading circuit (210) is used for converting the optical signal subjected to the photosensitive processing by the optical processing module (10) into an analog signal;
and the dual-channel data acquisition circuit (220) is connected with the data reading circuit (210) and is used for acquiring the analog signal output by the data reading circuit (210) and converting the analog signal into a digital signal.
10. The sensor of claim 1, further comprising:
a support column (40) disposed inside the receiving part (30), the support column (40) supporting the data processing module (20).
11. Sensor according to claim 10, characterized in that the supporting pillar (40) is a copper pillar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911222902.9A CN110888027A (en) | 2019-12-03 | 2019-12-03 | Sensor for detecting discharge of ring main unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911222902.9A CN110888027A (en) | 2019-12-03 | 2019-12-03 | Sensor for detecting discharge of ring main unit |
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