CN112271691A - Integrated high-speed arc light acquisition protection device and acquisition analysis control system - Google Patents
Integrated high-speed arc light acquisition protection device and acquisition analysis control system Download PDFInfo
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- CN112271691A CN112271691A CN202011100665.1A CN202011100665A CN112271691A CN 112271691 A CN112271691 A CN 112271691A CN 202011100665 A CN202011100665 A CN 202011100665A CN 112271691 A CN112271691 A CN 112271691A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
- H02H1/0023—Using arc detectors sensing non electrical parameters, e.g. by optical, pneumatic, thermal or sonic sensors
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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
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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
- G01R31/1209—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 acoustic measurements
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses an integrated high-speed arc light acquisition protection device and an acquisition analysis control system, and relates to the technical field of arc detection and fault protection. In the invention: the MCU processor is used for carrying out synchronous acquisition and analysis on the spectrum signal, the sound signal and the electromagnetic wave signal, carrying out arc fault determination state output on the state in which the three signals are triggered simultaneously, and driving the high-speed relay to cut off the arc fault; and outputting an arc risk warning state in a synchronous triggering state of a spectrum signal and an electromagnetic wave signal or a synchronous triggering state of a sound signal and the electromagnetic wave signal in the three signals, driving an alarm to perform synchronous high-risk alarm, and switching the control system to a loop to-be-cut-off state. According to the invention, through adopting acousto-optic magnetism to carry out multi-dimensional and multi-index acquisition at the moment of arc occurrence, and through multiple analysis and judgment, whether the arc occurs or not is intelligently judged, so that false alarm is effectively avoided while the sensitivity is maintained, and arc fault removal operation is efficiently and accurately carried out.
Description
Technical Field
The invention belongs to the technical field of arc detection and fault protection, and particularly relates to an integrated high-speed arc light acquisition protection device and an acquisition analysis control system.
Background
In recent years, with the development of the power industry in China, the application number of switch cabinets is increasing, and the bus faults caused by arc short circuit of the switch cabinets are increasing. The arc short circuit fault inside the switch cabinet is a very serious fault in a power distribution system, the occurrence of the arc short circuit fault often causes disastrous consequences, various fault arc effects generated by huge energy released by internal arc combustion seriously burn expensive switch equipment, and short circuit current impact can damage a main transformer to cause long-time power failure. More seriously, it also causes personal injury and death accidents to nearby workers.
In the arc detection mode for the switch cabinet, most of the arc detection modes directly adopt an arc sensing mode to judge the arc generated in the switch cabinet, and the mode obviously has certain misjudgment in the actual use process of the switch cabinet. Or a real-time current monitoring mode is adopted to judge whether the arc is generated, but the current monitoring mode is generally that a current transformer is added in a loop, the current transformer has current when the loop is normally conducted, the current in the loop is easy to change suddenly at the starting moment of some large-scale equipment, so that the current judgment of the current transformer is wrong, and even if the judgment is combined with optical signals, the judgment has higher misjudgment probability.
And to the erroneous judgement nature that exists of current arc light monitoring mode, adopt some long-range backstage to assist the judgement among the electric power system, but in the signal round trip transmission in-process, the time of delaying is longer, can produce the influence to the trip efficiency behind the electric arc production.
The following arc detection and protection modes of the switch cabinet exist at present:
the first and the second transformer backup overcurrent protection schemes. The medium voltage bus protection scheme is the most widely applied medium voltage bus protection scheme in China at present. Because the action time limit of the main transformer backup protection must be matched with the overcurrent protection of the outgoing line and the section switch according to the step principle to provide selectivity, the bus fault removal time adopting the protection scheme is longer, the protection trip-out time is generally set to be 1.5-2.0s, and some time can even be as long as 2.0-2.6 s. It is clearly far from meeting the requirement of rapidly clearing the medium voltage bus fault within 100 ms.
And secondly, the overcurrent protection scheme of the feeder line overcurrent protection locking transformer. The overcurrent blocking type medium-voltage bus protection scheme is a so-called overcurrent blocking type medium-voltage bus protection scheme which is proposed abroad and utilizes a feeder overcurrent element to block the overcurrent protection of a transformer along with the wide application of microcomputer overcurrent protection in medium-voltage feeders in recent years. The action speed of the protection scheme is improved to a certain extent and reaches 300-400ms, but the protection scheme cannot meet the requirement of cutting off the faults of the medium-low voltage bus within 100 ms.
And thirdly, adopting a high-impedance bus protection scheme of a circulating current principle. The protection scheme is a special current differential medium voltage bus protection scheme and is sometimes adopted in some important foreign projects. The typical action time of the protection is 35ms-60ms, which is faster than the two schemes, and the total fault clearing time is about 100ms, which basically meets the requirement of action rapidity. However, the protection range of this protection scheme is limited due to the limitation of the installation position of the CT, and the cable joint part of the cable chamber cannot be protected, which is a place with a high failure probability. In addition, the protection scheme is not suitable for protecting the medium and low voltage bus because of complex wiring, high requirements on CT, failure location, difficulty in mounting on the 6-35KV bus, low economy and the like.
The three medium-low voltage bus protection schemes can not meet the requirements of quick fault removal or protection coverage, and a novel medium-low voltage bus protection system which is quick, economical and high in applicability is urgently needed to solve the problems that the fault probability of the medium-low voltage bus is high, the fault development is caused by delayed fault removal, the fault is enlarged, and the huge economic loss is caused.
The purpose of arc protection is to protect nearby workers and equipment by limiting the arc burning time when an arc fault occurs; for this purpose, the arc protection must first detect a fault arc and then cut off the fault current flowing through it. In the internal fault protection of the medium and low-voltage switch cabinet, a fault is generally cut off by tripping a breaker to extinguish a fault arc.
In summary, it is an urgent need to solve the problem that the accurate detection of the arc in the grid switch cabinet further reduces the signal interference rate except for the arc and automatically removes the fault in a very short time.
Disclosure of Invention
The invention aims to provide an integrated high-speed arc light acquisition protection device and an acquisition analysis control system, which adopt acousto-optic magnetism to perform multi-dimensional and multi-index acquisition at the moment of arc occurrence, intelligently judge whether the arc occurs through multiple analysis and judgment, effectively avoid false alarm while keeping sensitivity, and further efficiently and accurately perform arc fault removal operation.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the noun explanations referred to in the present invention:
general electromagnetic wave band: when the arc occurs, no matter the intensity of the arc, the electromagnetic spectrum generated by the arc has small variation fluctuation and has a common electromagnetic wave band interval.
An aluminum oxide material plate: the aluminum oxide material plate has high temperature resistance and low electromagnetic wave blocking and absorbing rate, and the acquisition accuracy of electromagnetic waves is improved.
The invention relates to an integrated high-speed arc light acquisition protection device, which comprises a switch cabinet body and an acquisition device part, wherein the acquisition device part comprises: a non-contact electric arc detection device is arranged in the switch cabinet body in a matching way; a first bottom side plate and a first upper side plate are arranged on one side of the non-contact electric arc detection device; the non-contact arc detection device is provided with a sound wave acquisition probe positioned in the first bottom side plate and the first upper side plate assembly; a photosensitive acquisition box is arranged on one side of the non-contact electric arc detection device; the photosensitive collecting box is internally provided with an inner photosensitive mechanism; a second protective mounting plate made of alumina and positioned between the first upper side plate and the photosensitive acquisition box is arranged on the non-contact arc detection device; and a plurality of levels of electromagnetic wave signal antennas are arranged on the inner side of the second protective mounting plate.
In a preferred embodiment of the present invention, the second protective mounting plate is made of an aluminum oxide plate.
As a preferred technical scheme of the invention, the first upper side plate is a folded plate, and a wide-mouth opening is formed between the folded plate at the outer end of the first upper side plate and the first bottom side plate; the inner side surfaces of the first bottom side plate and the first upper side plate are embedded with a light surface material reflecting plate; the sound wave acquisition probe is provided with a capacitive microphone for capturing sound wave signals.
As a preferred technical scheme of the invention, one side of the photosensitive acquisition box is provided with a first transparent glass plate for protecting the photosensitive mechanism at the inner side; a photosensitive diode is arranged on the inner photosensitive mechanism; the electromagnetic wave signal receiving sections of the electromagnetic wave signal antennas of a plurality of levels are continuous.
An integrated high-speed arc light acquisition and analysis control system, which comprises:
transmitting sound waves generated by the electric arc to a sound wave acquisition probe, and transmitting received signals to the MCU processor by the sound wave acquisition probe; visible light emitted by the electric arc is collected by the inner photosensitive mechanism, and the collected photosensitive signals are transmitted to the MCU processor.
When the sound wave acquisition probe acquires the sound wave generated by the electric arc, acquiring the sound wave in a corresponding interval, and defining the interval of the electric arc action sound wave to be acquired as [ c, d ] Hz; when the inner photosensitive mechanism collects visible light generated by the electric arc, the visible light in a corresponding interval is collected, and the interval of a visible spectrum generated by the electric arc to be collected is defined as [ a, b ] nm.
Electromagnetic waves generated by the electric arc penetrate through the second protective mounting plate made of alumina, and the electromagnetic wave signal antenna receives a general electromagnetic wave band generated by the electric arc; when the electromagnetic wave signal antenna collects the electromagnetic waves generated by the arc, the electromagnetic waves in the corresponding interval are collected, and the electromagnetic wave collection interval to be collected is defined as [ e, f ] MHz.
When the electromagnetic wave signals of the electric arc are collected in the collection analysis system, the electromagnetic wave signal antennas of a plurality of levels carry out continuous interval monitoring, and when the electromagnetic wave signal antennas of the plurality of levels simultaneously acquire the corresponding electromagnetic wave signals, the triggering of the electromagnetic wave signals of the electric arc is judged.
The MCU processor is used for carrying out synchronous acquisition and analysis on the spectrum signal, the sound signal and the electromagnetic wave signal, carrying out arc fault determination state output on the state in which the three signals are triggered simultaneously, and driving the high-speed relay to cut off the arc fault; outputting an arc risk warning state to a synchronous triggering state of a spectrum signal and an electromagnetic wave signal or a synchronous triggering state of a sound signal and the electromagnetic wave signal in the three signals, driving an alarm to perform synchronous high-risk alarm, and switching a control system to a loop to-be-cut-off state; and synchronously triggering the spectral signal and the sound signal in the three signals to carry out arc risk prompt output.
As a preferred technical scheme of the invention, the electromagnetic wave signal antenna of a plurality of levels carries out electromagnetic wave collection interval [ e, f ] MHz which belongs to the frequency range of the wave band of the general electromagnetic wave emitted when the electric arc is generated; if the frequency range of the wave band of the electromagnetic wave emitted when the arc is generated is [ j, k ] MHz, then [ e, f ] E [ j, k ] exists.
As a preferred technical scheme of the invention, in the electric arc electromagnetic wave signal acquisition system, each electromagnetic wave signal antenna is connected with an electromagnetic wave signal capturing input module, a signal differential acquisition module and a signal amplification output module in a matching way; the independent signals output by the signal amplification output modules are jointly transmitted to the AND logic module, meet the AND logic relationship and output signals to the MCU processor, and the MCU processor correspondingly drives the high-speed relay or the warning device or the risk prompter by combining the states of the spectrum signals and the sound signals after processing the signals.
The invention has the following beneficial effects:
1. according to the invention, acousto-optic magnetism is adopted to carry out multi-dimensional and multi-index acquisition at the moment of arc occurrence, whether the arc occurs is intelligently judged through multiple analysis and judgment, and false alarm is effectively avoided while the sensitivity is maintained, so that arc fault removal operation is efficiently and accurately carried out;
2. the invention adopts the operation modes of on-site detection, on-site analysis and on-site removal, realizes on-site single-machine independent operation, does not need remote signal back-and-forth transmission control, and greatly reduces the fault removal time, thereby removing the arc fault before the arc fault spreads;
3. the invention collects the electromagnetic wave band generated by the electric arc, sets the antennas in a plurality of continuous electromagnetic wave capturing intervals to capture multiple electromagnetic wave signals, and outputs the final electric arc electromagnetic wave determining signal under the condition of meeting the multi-interval electromagnetic wave band, thereby reducing the electromagnetic interference rate except the electric arc and effectively improving the judgment accuracy of the electric arc electromagnetic wave index.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an arc collection device in a switchgear of the present invention;
FIG. 2 is a logic diagram of the arc collection system of the present invention;
FIG. 3 is a schematic diagram showing the relationship between generation and collection of electromagnetic waves generated by an arc;
FIG. 4 is a circuit for collecting sound signals when an arc occurs according to the present invention;
FIG. 5 is a circuit for collecting a spectrum signal when an arc occurs according to the present invention;
FIG. 6 shows an electromagnetic wave signal acquisition circuit according to the present invention;
FIG. 7 is a schematic diagram of an MCU processor according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-a switch cabinet body; 2-a non-contact arc detection device; 3-a first bottom side plate; 4-a first upper side plate; 5-smooth surface material reflecting plate; 6-sound wave acquisition probe; 7-a photosensitive collection box; 8-a first transparent glass plate; 9-inner photosensitive mechanism; 10-a second protective mounting plate; 11-electromagnetic wave signal antenna.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Example one
Referring to fig. 1 to 7, in the collecting apparatus portion: a non-contact arc detection device 2 is arranged in the switch cabinet body 1 in a matching way; a first bottom side plate 3 and a first upper side plate 4 are arranged on one side of the non-contact arc detection device 2; the non-contact arc detection device 2 is provided with a sound wave acquisition probe 6 positioned inside the combination of the first bottom side plate 3 and the first upper side plate 4; a photosensitive acquisition box 7 is arranged on one side of the non-contact arc detection device 2; an inner side photosensitive mechanism 9 is arranged in the photosensitive acquisition box 7; a second protective mounting plate 10 made of alumina and positioned between the first upper side plate 4 and the photosensitive acquisition box 7 is arranged on the non-contact arc detection device 2; the inside of the second shielding mounting plate 10 is mounted with several levels of electromagnetic wave signal antennas 11.
Further, the second protective mounting plate 10 is made of an aluminum oxide material plate.
Further, the first upper side plate 4 is a folded plate, and a wide-mouth opening is formed between the folded plate at the outer end of the first upper side plate 4 and the first bottom side plate 3; the inner side surfaces of the first bottom side plate 3 and the first upper side plate 4 are embedded with a light surface material reflecting plate 5; the acoustic wave acquisition probe 6 is provided with a capacitive microphone for capturing acoustic wave signals.
Further, one side of the photosensitive acquisition box 7 is provided with a first transparent glass plate 8 for protecting the photosensitive mechanism 9 at the inner side; a photosensitive diode is arranged on the inner photosensitive mechanism 9; the electromagnetic wave signal receiving sections of the electromagnetic wave signal antennas 11 of several levels are continuous.
An integrated high-speed arc light acquisition and analysis control system, which comprises:
the sound wave generated by the electric arc is transmitted to the sound wave acquisition probe 6, and the sound wave acquisition probe 6 transmits the received signal to the MCU processor; when the sound wave collection probe 6 collects the sound wave generated by the electric arc, the sound wave in the corresponding interval is collected, and the interval of the electric arc action sound wave to be collected is defined as [ c, d ] Hz.
Visible light generated by the electric arc is collected by the inner photosensitive mechanism 9, and the collected photosensitive signals are transmitted to the MCU processor; when the inner photosensitive mechanism 9 collects the visible light generated by the electric arc, the visible light in the corresponding interval is collected, and the visible spectrum interval generated by the electric arc to be collected is defined as [ a, b ] nm.
The electromagnetic wave generated by the electric arc penetrates through the second protective mounting plate 10 made of alumina, and the electromagnetic wave signal antenna 11 receives the wave band of the general electromagnetic wave generated by the electric arc; when the electromagnetic wave signal antenna 11 collects the electromagnetic wave generated by the arc, the electromagnetic wave in the corresponding interval is collected, and the electromagnetic wave collection interval to be collected is defined as [ e, f ] MHz.
When the electromagnetic wave signals of the electric arc are collected in the collection analysis system, the electromagnetic wave signal antennas 11 of a plurality of levels are used for monitoring in a continuous interval, and when the electromagnetic wave signal antennas 11 of a plurality of levels simultaneously acquire corresponding electromagnetic wave signals, the triggering of the electromagnetic wave signals of the electric arc is judged;
the MCU processor is used for carrying out synchronous acquisition and analysis on the spectrum signal, the sound signal and the electromagnetic wave signal, carrying out arc fault determination state output on the state in which the three signals are triggered simultaneously, and driving the high-speed relay to cut off the arc fault; outputting an arc risk warning state to a synchronous triggering state of a spectrum signal and an electromagnetic wave signal or a synchronous triggering state of a sound signal and the electromagnetic wave signal in the three signals, driving an alarm to perform synchronous high-risk alarm, and switching a control system to a loop to-be-cut-off state; and synchronously triggering the spectral signal and the sound signal in the three signals to carry out arc risk prompt output.
Furthermore, the electromagnetic wave signal antenna 11 of a plurality of levels collects the electromagnetic wave within the interval [ e, f ] MHz belonging to the frequency range of the wave band of the general electromagnetic wave emitted when the electric arc is generated; if the frequency range of the wave band of the electromagnetic wave emitted when the arc is generated is [ j, k ] MHz, then [ e, f ] E [ j, k ] exists.
Furthermore, in the electric arc electromagnetic wave signal acquisition system, each electromagnetic wave signal antenna 11 is connected with an electromagnetic wave signal capturing input module, a signal differential acquisition module and a signal amplifying output module in a matching way; the independent signals output by the signal amplification output modules are jointly transmitted to the AND logic module, meet the AND logic relationship and output signals to the MCU processor, and the MCU processor correspondingly drives the high-speed relay or the warning device or the risk prompter by combining the states of the spectrum signals and the sound signals after processing the signals.
Example two
In the present invention:
the first top board 4 of zigzag forms the outer wide-mouth with first bottom side board 3, collects the sound signal when electric arc takes place to carry out the conduction in the sound wave is reduced low-loss through plain noodles material reflecting plate 5, can enough prevent electric arc to the direct destruction of sound wave acquisition probe, also can be comparatively high-efficient accurate monitoring sensing electric arc action sound wave.
Similarly, the first transparent glass plate 8 also protects the inner photosensitive mechanism 9, and the second protective mounting plate 10 can protect the electromagnetic wave signal antenna 11 and prevent the electric arc from damaging the sensor element.
The second protection mounting plate 10 is arranged on the periphery of the electromagnetic wave signal antenna 11, and the second protection mounting plate 10 made of alumina is adopted, so that the alumina has high temperature resistance and cannot be damaged when energy is released instantly due to electric arc; and secondly, the aluminum oxide material plate has better electromagnetic wave penetrability and lower influence on the attenuation of the electromagnetic wave.
As shown in fig. 3, when an arc occurs, the generated electromagnetic wave has a transparent electromagnetic wave band, and a stable electromagnetic wave band acquisition region is set in the transparent electromagnetic wave band, so as to facilitate highly accurate electromagnetic wave signal acquisition.
In addition, even if there is no arc current influence, there is a certain interference electromagnetic wave, for example, in fig. 3, the state is Non when there is no arc current, but the electromagnetic wave still exists in the field environment.
As shown in fig. 4, in the sound signal collecting circuit for arc generation of the present invention, after the capacitive microphone is affected by sound waves, a fluctuation signal is triggered to C1 through the MOS circuit to form a sound signal SENSOR 3.
As shown in fig. 5, in the spectrum signal collecting circuit when an arc occurs in the present invention, the photodiode is turned on to form a short-circuit ground loop, the operational amplifier circuit generates and outputs a level signal, and the output spectrum signal is SENSOR 2.
As shown in fig. 6, the electromagnetic wave signal acquisition circuit of the present invention is provided with the same number of electromagnetic wave signal acquisition circuits as the corresponding antennas according to actual requirements, and in the signal capture input module, the LC oscillation circuit of the adjustable acquisition type captures and collects the electromagnetic wave signals within the corresponding frequency; according to the electromagnetic frequency of the corresponding electric arc electromagnetic wave zoning, the parameters of the LC oscillating circuit are correspondingly set and adjusted; the signal difference acquisition module is used for carrying out voltage difference processing and signal triggering on the captured electromagnetic wave signals, then the signal amplification output module is used for outputting electromagnetic wave signals (such as B1, B2 and B3 in the figure) generated by corresponding electromagnetic wave frequencies, and the judgment is carried out by the AND logic module, so that the high-accuracy electric arc electromagnetic wave signal output SENSOR1 is completed.
As shown in fig. 7, which is a schematic diagram of the MCU processor in the present invention, the MCU processor acquires three signal states of SENSOR1, SENSOR2, and SENSOR3, and further outputs corresponding driving signals [ such as RELAY12, RELAY13, and RELAY14 in fig. 7 ] according to the actual signal on-state, so as to control the corresponding high-speed RELAY, alarm, prompter, etc.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The utility model provides a protection device is gathered to high-speed arc light of integrated form, includes the cubical switchboard body (1), collection system part, its characterized in that:
the collecting device part comprises:
a non-contact electric arc detection device (2) is arranged in the switch cabinet body (1) in a matching way;
a first bottom side plate (3) and a first upper side plate (4) are arranged on one side of the non-contact electric arc detection device (2);
the non-contact arc detection device (2) is provided with a sound wave acquisition probe (6) positioned inside the combination of the first bottom side plate (3) and the first upper side plate (4);
a photosensitive acquisition box (7) is arranged on one side of the non-contact arc detection device (2);
an inner side photosensitive mechanism (9) is arranged in the photosensitive acquisition box (7);
a second protective mounting plate (10) positioned between the first upper side plate (4) and the photosensitive acquisition box (7) is arranged on the non-contact arc detection device (2);
and a plurality of levels of electromagnetic wave signal antennas (11) are arranged on the inner side of the second protective mounting plate (10).
2. The integrated high-speed arc light collection protection device of claim 1, wherein:
the second protective mounting plate (10) is made of an aluminum oxide material plate.
3. The integrated high-speed arc light collection protection device of claim 1, wherein:
the first upper side plate (4) is a folded plate, and a wide-mouth opening is formed between the folded plate at the outer end of the first upper side plate (4) and the first bottom side plate (3);
the inner side surfaces of the first bottom side plate (3) and the first upper side plate (4) are embedded with a light surface material reflecting plate (5);
and a capacitive microphone for capturing sound wave signals is arranged on the sound wave acquisition probe (6).
4. The integrated high-speed arc light collection protection device of claim 1, wherein:
a first transparent glass plate (8) for protecting the photosensitive mechanism (9) at the inner side is arranged at one side of the photosensitive acquisition box (7);
a photosensitive diode is arranged on the inner side photosensitive mechanism (9);
the electromagnetic wave signal receiving sections of the electromagnetic wave signal antennas (11) of a plurality of levels are continuous.
5. An integrated high-speed arc light acquisition analysis control system is characterized in that sound waves generated by an arc are transmitted to a sound wave acquisition probe (6), and the sound wave acquisition probe (6) transmits received signals to an MCU (microprogrammed control unit) processor; visible light generated by the electric arc is collected by the inner side photosensitive mechanism (9), and the collected photosensitive signals are transmitted to the MCU processor; the method is characterized in that:
in the acquisition and analysis system part:
when the sound wave collection probe (6) collects the sound wave generated by the electric arc, collecting the sound wave in a corresponding interval, and defining the interval of the electric arc action sound wave to be collected as [ c, d ] Hz;
when the inner side photosensitive mechanism (9) collects visible light generated by the electric arc, the visible light in a corresponding interval is collected, and a visible spectrum interval generated by the electric arc to be collected is defined as [ a, b ] nm;
the electromagnetic wave generated by the electric arc penetrates through the second protective mounting plate (10) made of alumina, and the electromagnetic wave signal antenna (11) receives the general electromagnetic wave band generated by the electric arc;
when the electromagnetic wave signal antenna (11) collects the electromagnetic waves generated by the arc, the electromagnetic waves in the corresponding interval are collected, and the collection interval of the electromagnetic waves to be collected is defined as [ e, f ] MHz;
when the electromagnetic wave signals of the electric arc are collected in the collection analysis system, the electromagnetic wave signal antennas (11) of a plurality of levels are used for monitoring in a continuous interval, and when the electromagnetic wave signal antennas (11) of a plurality of levels simultaneously obtain corresponding electromagnetic wave signals, the triggering of the electromagnetic wave signals of the electric arc is judged;
the MCU processor is used for carrying out synchronous acquisition and analysis on the spectrum signal, the sound signal and the electromagnetic wave signal, carrying out arc fault determination state output on the state in which the three signals are triggered simultaneously, and driving the high-speed relay to cut off the arc fault; outputting an arc risk warning state to a synchronous triggering state of a spectrum signal and an electromagnetic wave signal or a synchronous triggering state of a sound signal and the electromagnetic wave signal in the three signals, driving an alarm to perform synchronous high-risk alarm, and switching a control system to a loop to-be-cut-off state; and synchronously triggering the spectral signal and the sound signal in the three signals to carry out arc risk prompt output.
6. The integrated high-speed arc light collection analysis control system of claim 5, wherein:
the electromagnetic wave signal antenna (11) of a plurality of levels collects the interval [ e, f ] MHz of electromagnetic wave and belongs to the frequency range of the wave band of the general electromagnetic wave emitted when the electric arc is generated;
if the frequency range of the wave band of the electromagnetic wave emitted when the arc is generated is [ j, k ] MHz, then [ e, f ] E [ j, k ] exists.
7. The integrated high-speed arc light collection analysis control system of claim 5, wherein:
in the electric arc electromagnetic wave signal acquisition system, each electromagnetic wave signal antenna (11) is connected with an electromagnetic wave signal capturing input module, a signal differential acquisition module and a signal amplification output module in a matching way;
the independent signals output by the signal amplification output modules are jointly transmitted to the AND logic module, satisfy the AND logic relationship and output signals to the MCU processor;
after the MCU processor processes the signals, the high-speed relay, the warning device or the risk prompter is correspondingly driven by combining the states of the spectrum signals and the sound signals.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113030663A (en) * | 2021-03-09 | 2021-06-25 | 安徽中科超屹科技有限公司 | Electric power equipment with collecting and analyzing functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030663A (en) * | 2021-03-09 | 2021-06-25 | 安徽中科超屹科技有限公司 | Electric power equipment with collecting and analyzing functions |
| CN113030663B (en) * | 2021-03-09 | 2024-05-03 | 安徽中科超屹科技有限公司 | Power equipment with collecting and analyzing functions |
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