CN201828634U - Electric arc detection device of high-voltage cabinet - Google Patents
Electric arc detection device of high-voltage cabinet Download PDFInfo
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- CN201828634U CN201828634U CN2010205035856U CN201020503585U CN201828634U CN 201828634 U CN201828634 U CN 201828634U CN 2010205035856 U CN2010205035856 U CN 2010205035856U CN 201020503585 U CN201020503585 U CN 201020503585U CN 201828634 U CN201828634 U CN 201828634U
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Abstract
The utility model discloses an electric arc detection device of a high-voltage cabinet, which comprises a detection sensor unit, a transimpedance amplifier unit, a filter amplifying unit and a data processing unit; the detection sensor unit is used for detecting an ultraviolet light signal when electric arc occurs, and sending the acquired signal to the data processing unit after acquired signal is processed through an amplifying module and a filter module; the device further comprises an interface circuit unit; the interface circuit unit is connected with the signal output end of the data processing unit; and the electric arc detection device of the high-voltage cabinet detects the electric arc by detecting ultraviolet light, is insensitive to sunlight, thus has stronger anti-interference capability, simultaneously has very high signal detection speed by adopting a light signal detection method, improves the response time to be within 3ms around, so that the safety protection capability of the switch cabinet is further improved.
Description
Technical field
The utility model relates to the electric power monitoring field, particularly a kind of pick-up unit that is used for arc-detection in the high-voltage board.
Background technology
Switch cubicle internal fault electric arc is a kind of taking place frequently property, catastrophic catastrophic failure.Fault electric arc causes electric system and consumer to damage and personal injury in case generation just can give off huge sound, light, electricity, hot homenergic.The extent of injury of arc fault depends on flame current and mute time, has only total mute time less than 85ms, just can make not sustain damage of equipment.
At present a lot of to the detection method of electric arc.For example: placement force sensing system in the switch cubicle different units by pressure wave triggers, makes the circuit breaker trip to the fault loop power supply; The detection protective device that has is by detecting the early signal of failure of insulation; In addition, also have some methods [3-11] by the composite signal of detection sound, light, pressure, electric current.Above-mentioned detection method, most more complicated, it is bigger to implement difficulty, cost is also higher, this just cause said method do not have can large-scale promotion application in engineering practice.In recent years; developed abroad that arc light detects and protection system, as: German Moeller company is used for the ARC Guard System fault electric arc protection system of fault electric arc protection system ARCON, the ABB of low-tension switch cabinet, the VAMP system of Finland Vaasa company etc.These systems are based on arc light and the two criterions of sending when detecting arc fault of overcurrent, the bus protection of safety to provide fast, and this provides a kind of effective solution for the restriction arc fault damages.Since the nineties in last century, external increasing electric power and industrial user recognize the harm of arc fault, have adopted these protection schemes in switch cubicle.Having influenced it but these system complex, price are high promotes the use of.
Owing to factors such as wearing out of high-voltage switch gear, cause that the misoperation meeting of high-voltage switch gear brings influence for the safe and stable operation of electric system, and traditional preventive maintenance to power equipment there is manpower to spend shortcomings such as more and the operation of will arranging to have a power failure.Therefore, it is imperative the on-line monitoring system of high-tension switch cabinet state of insulation to be proposed a kind of feasible scheme.
Summary of the invention
In view of this, the purpose of this utility model provides that a kind of antijamming capability is strong, highly sensitive, the high-voltage board electric arc detecting device of low cost of manufacture.
The purpose of this utility model is achieved through the following technical solutions:.
High-voltage board electric arc detecting device of the present utility model comprises detection sensor unit, trans-impedance amplifier unit, filtering amplifying unit, data processing unit, described detection sensor unit is used to detect the ultraviolet signal that produces when electric arc takes place, and the signal that collects is sent into data processing unit after amplification module and filtration module processing.
Further, described device also comprises the interface circuit unit, and the signal output part of described interface circuit unit and data processing unit links;
Further, described detection sensor unit comprises a day blind area UV photosensitive diode;
Further, described trans-impedance amplifier unit comprises voltage feed-back amplifier, feedback resistance, feedback capacity, photosensitive tube electric capacity and input capacitance, after described photosensitive tube electric capacity and the input capacitance parallel connection, the inverting input of an end and voltage feed-back amplifier links, other end ground connection; Described feedback resistance is connected between the output terminal and inverting input of voltage feed-back amplifier, and described feedback capacity and feedback resistance are in parallel; The plus earth of described day blind area UV photosensitive diode, the inverting input of negative pole and voltage feed-back amplifier links;
Further, described filter comprises first operational amplifier, second operational amplifier, first filter capacitor, second filter capacitor, the first amplifier resistance, the second amplifier resistance, first stake resistance, second stake resistance and isolation resistance, one end of described first filter capacitor is as the filtering input end, after connecting with second filter capacitor, the other end inserts the inverting input of first operational amplifier, after connecting with the first amplifier resistance, the common junction of described first filter capacitor and second filter capacitor inserts the output terminal of first operational amplifier, one end of described first stake resistance and the inverting input of first operational amplifier link, other end ground connection, the in-phase input end of described first operational amplifier and its output terminal link;
The inverting input of described second operational amplifier links by the output terminal of the isolation resistance and first operational amplifier, the described second amplifier resistance string is associated between the inverting input and output terminal of second operational amplifier, and the in-phase input end of described second operational amplifier is by second ground resistance earth; The output terminal of described second operational amplifier and the input end of data processing unit link;
Further, described data processing unit is a single-chip microcomputer;
Further, described device also comprises the warning circuit unit, and described warning circuit unit and data processing unit link.
Electric arc essence is the final form of gas discharge, is attended by luminous effect in the process gas discharge, can give off ultraviolet ray.By the spectral analysis of corona discharge as can be known, its wavelength major part is in the scope of 280-400nm.Generally in electric system, impressed voltage is all than higher, and therefore in the spectrum of corona discharge, the radiation intensity of ultraviolet region is always higher, therefore, can detect arc discharge by detecting " day is blind " district ultraviolet light.The present invention is exactly according to this principle, detects the ultraviolet power of arc radiation, and itself and setting power threshold value are compared judgement, thereby realizes the detection to arc discharge.
The beneficial effects of the utility model are:
1. the utility model comes detected arc by detecting ultraviolet light, insensitive to sunshine, therefore has stronger antijamming capability, simultaneously, because adopt the optical signal detecting mode, detected speed signal is very fast, will improve in the reaction time, greatly within 3mS, thereby further improved the protection abilities of switch cubicle;
2. apparatus of the present invention working stability, device volume is little, is convenient to interface and installation, can make mancarried device, and it is simple to adjust, accurately the failure judgement scene.Cost is low, long working life.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can realize and obtain by following instructions and claims.
Description of drawings
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is each unit connection diagram of the present utility model;
Fig. 2 is a sensor spectrum response curve;
Fig. 3 is the circuit connection diagram of striding the resistance amplifying unit;
Fig. 4 is the circuit connection diagram of filtering amplifying unit;
Fig. 5 is the implementing procedure synoptic diagram of this device.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only for the utility model is described, rather than in order to limit protection domain of the present utility model.
As shown in Figure 1, high-voltage board electric arc detecting device of the present utility model comprises detection sensor unit 1, trans-impedance amplifier unit 2, filtering amplifying unit 3 and data processing unit 4, detection sensor unit is used to detect the ultraviolet signal that produces when electric arc takes place, and the signal that collects is sent into data processing unit 4 after amplification module and filtration module processing.In the present embodiment, data processing unit 4 adopts single-chip microcomputer.
In the present embodiment, detection sensor unit 1 is to be made of day blind area UV photosensitive diode D, its model is uv10t2e10l, detecting ultraviolet wavelength band is 210～380nm, insensitive to visible light, its sensitivity is 4 V/nW, can respond extremely faint ultraviolet signal, thereby has guaranteed the accuracy of arc-detection.Its spectral response curve as shown in Figure 2.
As shown in Figure 3, the trans-impedance amplifier unit in the present embodiment comprises voltage feed-back amplifier F, feedback resistance R
F, feedback capacity C
F, the photosensitive tube capacitor C
PDWith input capacitance C
IN, the photosensitive tube capacitor C
PDWith input capacitance C
INAfter the parallel connection, the inverting input of an end and voltage feed-back amplifier F links, other end ground connection; Feedback resistance R
FBe connected between the output terminal and inverting input of voltage feed-back amplifier F feedback capacity C
FWith feedback resistance R
FBe in parallel; The plus earth of day blind area UV photosensitive diode D, the inverting input of negative pole and voltage feed-back amplifier F links.Voltage feed-back amplifier F has used the voltage feed-back amplifier of a rail-to-rail output, and model is the LMH6611 that is produced by National Semiconductor, and gain-bandwidth is 345 MHz.
As shown in Figure 4, the filtering amplifying unit in the present embodiment comprises the first operational amplifier U1, the second operational amplifier U2, the first filter capacitor C1, the second filter capacitor C2, the first amplifier resistance R 1, the second amplifier resistance R 2, the first stake resistance R3, the second stake resistance R4 and isolation resistance R
GThe end of the first filter capacitor C1 is as the filtering input end, after connecting with the second filter capacitor C2, the other end inserts the inverting input of the first operational amplifier U1, after connecting with the first amplifier resistance R 1, the common junction of the first filter capacitor C1 and the second filter capacitor C2 inserts the output terminal of the first operational amplifier U1, the end of the first stake resistance R3 and the inverting input of the first operational amplifier U1 link, other end ground connection, the in-phase input end of the first operational amplifier U1 and its output terminal link;
The inverting input of the second operational amplifier U2 is by isolation resistance R
GLink with the output terminal of the first operational amplifier U1, the second amplifier resistance R 2 is connected between the inverting input and output terminal of the second operational amplifier U2, and the in-phase input end of the second operational amplifier U2 is by the second stake resistance R4 ground connection; The input end of the output terminal of the second operational amplifier U2 and data processing unit 4 links.
Filtering amplifying unit in the present embodiment is used for the previous stage amplifying signal is carried out Filtering Processing, employing be second order Butterworth Hi-pass filter, main filtering low-frequency disturbance, cutoff frequency 1KHz.Be the forward amplifying circuit then, whole signal waveform is adjusted amplification, make it satisfy the input requirement of the inner AD sample circuit of single-chip microcomputer, Shu Chu signal is between 0-2.5V at last.
Handling output is finished by single-chip microcomputer at last, by the signal behind the detecting circuit, the UV radiation average power is relevant with distance, instrument detecting is after average Radiant UV Power, stipulate a power threshold according to the size of this average discharge power and the distance of light source and pick-up unit by test, whether the switch that is used as switch cubicle has the decision condition of electric arc generation.Simultaneously, the electric arc pulse can not be too responsive, can not be too late blunt, and pulse height and pulsewidth are judged, also are that electric arc is judged important evidence.In the present embodiment, single-chip microcomputer is the high speed processor type, its clock 100MHz, instruction cycle is 10ns, produce the electric arc minimum requirements according to ultraviolet detection test and electric arc, learn by Theoretical Calculation, this device is handled an electric arc from occurring needing spended time to processing, it was 280 instruction cycles, less than 3ms.
This device also comprises interface circuit unit 5; particularly; hardware interface circuit and bus interface circuit have mainly been comprised; wherein hardware interface circuit is used for linking with relay equipment; realize transmitting functions such as signal, voltage coupling, can be connected with serial protective relaying devices such as Easy series small-sized programmable controller and PA100 easily.Bus interface circuit is used to realize the Network Transmission between a plurality of detecting devices, and for example by adopting the RS485 bus interface, a plurality of detecting devices can be formed Star Network and be transferred to the master-control room industrial computer.
This device also comprises warning circuit unit 6, can realize sound and light alarm by hummer and high brightness LED.
The enforcement software flow of this device at first carries out initialization such as system clock, port and timer as shown in Figure 5, and integration constant and squelch threshold value are set, and carries out UV signal and measures, and sets digital integration threshold value (specifically can according to the neighbourhood noise adjustment); Then detected ultraviolet signal is carried out digital integration under the regular hour constant; The average of quadraturing at last, and can draw actual numerical value according to the UV radiation derivation of equation; After drawing the discharge power value, just can compare, judge to have or not electric arc to take place by predetermined threshold value; At last testing result is exported with forms such as light, sound, 485 buses and relay equipment interfaces.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (7)
1. high-voltage board electric arc detecting device, it is characterized in that: described device comprises detection sensor unit (1), trans-impedance amplifier unit (2), filtering amplifying unit (3) and data processing unit (4), described detection sensor unit is used to detect the ultraviolet signal that produces when electric arc takes place, and the signal that collects is sent into data processing unit after amplification module and filtration module processing.
2. high-voltage board electric arc detecting device according to claim 1 is characterized in that: described device also comprises interface circuit unit (5), and described interface circuit unit (5) links with the signal output part of data processing unit.
3. high-voltage board electric arc detecting device according to claim 1 and 2 is characterized in that: described detection sensor unit (1) comprises a day blind area UV photosensitive diode (D).
4. high-voltage board electric arc detecting device according to claim 3 is characterized in that: described trans-impedance amplifier unit comprises voltage feed-back amplifier (F), feedback resistance (R
F), feedback capacity (C
F), photosensitive tube electric capacity (C
PD) and input capacitance (C
IN), described photosensitive tube electric capacity (C
PD) and input capacitance (C
IN) after the parallel connection, the inverting input of an end and voltage feed-back amplifier (F) links, other end ground connection; Described feedback resistance (R
F) be connected between the output terminal and inverting input of voltage feed-back amplifier (F) described feedback capacity (C
F) and feedback resistance (R
F) be in parallel; The plus earth of described day blind area UV photosensitive diode (D), the inverting input of negative pole and voltage feed-back amplifier (F) links.
5. high-voltage board electric arc detecting device according to claim 4 is characterized in that: described filter comprises first operational amplifier (U1), second operational amplifier (U2), first filter capacitor (C1), second filter capacitor (C2), the first amplifier resistance (R1), the second amplifier resistance (R2), first stake resistance (R3), second stake resistance (R4) and isolation resistance (R
G), one end of described first filter capacitor (C1) is as the filtering input end, after connecting with second filter capacitor (C2), the other end inserts the inverting input of first operational amplifier (U1), after connecting with the first amplifier resistance (R1), the common junction of described first filter capacitor (C1) and second filter capacitor (C2) inserts the output terminal of first operational amplifier (U1), the inverting input of one end of described first stake resistance (R3) and first operational amplifier (U1) links, other end ground connection, in-phase input end and its output terminal of described first operational amplifier (U1) link;
The inverting input of described second operational amplifier (U2) is by isolation resistance (R
G) link with the output terminal of first operational amplifier (U1), the described second amplifier resistance (R2) is connected between the inverting input and output terminal of second operational amplifier (U2), and the in-phase input end of described second operational amplifier (U2) is by second stake resistance (R4) ground connection; The input end of the output terminal of described second operational amplifier (U2) and data processing unit (4) links.
6. high-voltage board electric arc detecting device according to claim 1 is characterized in that: described data processing unit (4) is a single-chip microcomputer.
7. high-voltage board electric arc detecting device according to claim 1 and 2 is characterized in that: described device also comprises warning circuit unit (6), and described warning circuit unit (6) links with data processing unit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205035856U CN201828634U (en) | 2010-08-25 | 2010-08-25 | Electric arc detection device of high-voltage cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205035856U CN201828634U (en) | 2010-08-25 | 2010-08-25 | Electric arc detection device of high-voltage cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828634U true CN201828634U (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205035856U Expired - Fee Related CN201828634U (en) | 2010-08-25 | 2010-08-25 | Electric arc detection device of high-voltage cabinet |
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| CN (1) | CN201828634U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579945A (en) * | 2013-11-12 | 2014-02-12 | 长城电器集团乐山宁格朗电气有限责任公司 | 10kV high-voltage switch cabinet |
| CN105489438A (en) * | 2015-12-11 | 2016-04-13 | 国网安徽省电力公司淮北供电公司 | Electric arc detection device for arc extinguish chamber of high-voltage circuit-breaker |
| CN106771940A (en) * | 2017-03-01 | 2017-05-31 | 西安科技大学 | The circuit and method held time using signal single-phase monitoring inductance breaking arc |
| CN109342997A (en) * | 2018-12-04 | 2019-02-15 | 国家电网有限公司 | A kind of time difference positioning method and device based on pulse energy accumulation |
| CN109738768A (en) * | 2018-12-10 | 2019-05-10 | 国网浙江省电力有限公司金华供电公司 | A kind of switchgear electric arc on-line measuring device |
| CN110888027A (en) * | 2019-12-03 | 2020-03-17 | 深圳供电局有限公司 | Sensor for detecting discharge of ring main unit |
| CN111381120A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Photoelectric induction detection method and circuit applied to high-voltage parts |
| CN114156832A (en) * | 2021-11-24 | 2022-03-08 | 昆明理工大学 | Arc extinction detection method based on optical signals |
| CN114184912A (en) * | 2021-11-23 | 2022-03-15 | 昆明理工大学 | Arc starting detection method based on optical signal |
| CN115360826A (en) * | 2022-10-22 | 2022-11-18 | 北京金冠智能电气科技有限公司 | Intelligent power distribution terminal equipment |
-
2010
- 2010-08-25 CN CN2010205035856U patent/CN201828634U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579945A (en) * | 2013-11-12 | 2014-02-12 | 长城电器集团乐山宁格朗电气有限责任公司 | 10kV high-voltage switch cabinet |
| CN105489438A (en) * | 2015-12-11 | 2016-04-13 | 国网安徽省电力公司淮北供电公司 | Electric arc detection device for arc extinguish chamber of high-voltage circuit-breaker |
| CN106771940A (en) * | 2017-03-01 | 2017-05-31 | 西安科技大学 | The circuit and method held time using signal single-phase monitoring inductance breaking arc |
| CN106771940B (en) * | 2017-03-01 | 2019-06-18 | 西安科技大学 | The circuit and method held time using signal single-phase monitoring inductance breaking arc |
| CN109342997A (en) * | 2018-12-04 | 2019-02-15 | 国家电网有限公司 | A kind of time difference positioning method and device based on pulse energy accumulation |
| CN109738768A (en) * | 2018-12-10 | 2019-05-10 | 国网浙江省电力有限公司金华供电公司 | A kind of switchgear electric arc on-line measuring device |
| CN111381120A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Photoelectric induction detection method and circuit applied to high-voltage parts |
| CN111381120B (en) * | 2018-12-29 | 2022-01-07 | 比亚迪股份有限公司 | Photoelectric induction detection method and circuit applied to high-voltage parts |
| CN110888027A (en) * | 2019-12-03 | 2020-03-17 | 深圳供电局有限公司 | Sensor for detecting discharge of ring main unit |
| CN114184912A (en) * | 2021-11-23 | 2022-03-15 | 昆明理工大学 | Arc starting detection method based on optical signal |
| CN114156832A (en) * | 2021-11-24 | 2022-03-08 | 昆明理工大学 | Arc extinction detection method based on optical signals |
| CN115360826A (en) * | 2022-10-22 | 2022-11-18 | 北京金冠智能电气科技有限公司 | Intelligent power distribution terminal equipment |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20110825 |