CN206369785U - A kind of high-voltage DC power supply spark flashover detecting device - Google Patents
A kind of high-voltage DC power supply spark flashover detecting device Download PDFInfo
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- CN206369785U CN206369785U CN201720022219.0U CN201720022219U CN206369785U CN 206369785 U CN206369785 U CN 206369785U CN 201720022219 U CN201720022219 U CN 201720022219U CN 206369785 U CN206369785 U CN 206369785U
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- 238000001514 detection method Methods 0.000 claims abstract description 27
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Abstract
The utility model discloses a kind of high-voltage DC power supply spark flashover detecting device, it is related to high-voltage DC power supply technical field；The high-tension current isolation detection circuit connects point two-way after c ends are sampled, run signal process circuit is connect all the way, another road connects detection input circuit, the detection input circuit is electrically connected with comparator one, the comparator one is electrically connected with comparator two, the comparator one, comparator two are electrically connected with photoelectrical coupler input, input+end respectively, and the output end of the photoelectrical coupler is electrically connected with wiring j ends, wiring k ends respectively；The utility model can detect the generation of spark flashover by the way of hardware detection in moment, and reliable guaranteed conditions are provided for rapid processing spark flashover situation.
Description
Technical field
The utility model is related to a kind of high-voltage DC power supply spark flashover detecting device, belongs to high voltage direct current source technology neck
Domain.
Background technology
High-voltage DC power supply is widely used in the industries such as power generation, metallurgy, chemical industry, is the core dress of electrostatic dust collection equipment
Put.Accompanying drawing 1 is typical high voltage direct current source model, and its operation principle is：Circuit U, V ends input power frequency~380V power supplys, warp
The voltage levels of SCR1, SCR2 Group of Silicon Controlled Rectifier control adjustment output, are boosted by transformer B, D1, D2, D3, D4 composition high pressure
Full-wave rectifying circuit, circuit output（+）End ground connection, circuit output（-）The negative high-voltage of end output continuously adjustabe.
It is quiet in order to ensure that electrostatic electrostatic precipitator can normally be run when high-voltage DC power supply is applied in electrostatic precipitation field
Voltage added by electric cleaner two ends should reach the minimum voltage to be formed needed for corona is put a little i.e. starting voltage, work as electrostatic precipitator
When voltage is more than some minimum voltage, certain region between two-plate can be caused to occur gas breakdown, insulating gas interval is fast
Speed is changed into current channel, if do not disconnected circuit now, and this discharge channel will exist always, if power supply capacity
It is sufficiently large, arcing or name arcing electric discharge just occur between the two electrode machines, such as power supply capacity is not enough or takes braking measure,
Gas breakdown is just not enough to form electric arc, at this moment electric discharge can rest on the spark discharge stage, if can not according to flashover judge and
When accurately judge the generation of flashover, and controlled accordingly, can not only reduce the efficiency of dedusting, and can be to electrostatic precipitation
Device causes great injury.
When spark flashover occurs, output current, output voltage and the resonance current of high-voltage DC power supply can all become
Change, can be judged by running software data analysing method or hardware detection method.Running software data analysing method is
In collection service data and progress after analog-to-digital conversion is carried out, and to be necessarily required to the regular hour complete for data acquisition and analog-to-digital conversion
Into, therefore the method analysis result has certain hysteresis quality, and certain unfavorable factor is there is to rapid processing spark flashover.
Utility model content
In view of the above-mentioned problems, the technical problems to be solved in the utility model is to provide a kind of high-voltage DC power supply spark flashover
Detection means.
A kind of high-voltage DC power supply spark flashover detecting device of the present utility model, it includes high-tension current isolation detection electricity
Road, detection input circuit, comparator one, comparator two, photoelectrical coupler；The high-tension current isolation detection circuit connects c ends and entered
Point two-way after row sampling, connects run signal process circuit all the way, and another road connects detection input circuit, the detection input circuit with
Comparator one is electrically connected with, and the comparator one is electrically connected with comparator two, the comparator one, comparator two respectively with light
Electric coupler input-end, input+end are electrically connected with, and the output end of the photoelectrical coupler is electric with wiring j ends, wiring k ends respectively
Property connection.
Preferably, the detection input circuit that connects is by resistance one, resistance two, resistance three, resistance four, electric capacity one, two poles
Pipe one is constituted.
Preferably, the comparator one is made up of amplifier one, resistance five, resistance six, resistance seven, resistance eight.
Compare two preferably, described and be made up of amplifier two, adjustable resistor one, resistance nine.
Compared with prior art, the beneficial effects of the utility model are：By the way of hardware detection, it can be examined in moment
The generation of spark flashover is measured, reliable guaranteed conditions are provided for rapid processing spark flashover situation.
Brief description of the drawings
For ease of explanation, the utility model is described in detail by following specific implementations and accompanying drawing.
Fig. 1 is circuit theory diagrams of the prior art；
Fig. 2 is circuit diagram of the present utility model.
Embodiment
To make the purpose of this utility model, technical scheme and advantage of greater clarity, below by what is shown in accompanying drawing
Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality
With new scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily mixing
Confuse concept of the present utility model.
As shown in Fig. 2 present embodiment uses following technical scheme：It comprising high-tension current isolation detection circuit,
Detect input circuit, comparator one, comparator two, photoelectrical coupler G；The high-tension current isolation detection circuit connects the progress of c ends
Point two-way after sampling, connects run signal process circuit all the way, and another road connects detection input circuit, the detection input circuit with than
Be electrically connected with compared with device one, the comparator one is electrically connected with comparator two, the comparator one, comparator two respectively with photoelectricity
Coupler G inputs-end, input+end are electrically connected with, and the output end of the photoelectrical coupler G is electric with wiring j ends, wiring k ends respectively
Property connection.
The detection input circuit that connects is by the R1 of resistance one, the R2 of resistance two, the R3 of resistance three, the R4 of resistance four, the C1 of electric capacity one, two poles
The D1 of pipe one is constituted.
The comparator one is made up of the 1/2U1 of amplifier one, the R5 of resistance five, the R6 of resistance six, the R7 of resistance seven, the R8 of resistance eight.
It is described to compare two and be made up of the 2/2U1 of amplifier two, the VR1 of adjustable resistor one, the R9 of resistance nine.
The operation principle of present embodiment is：In Fig. 1, R4 is output current sampling resistor, High voltage output（+）Through R4
Access point G（Ground connection）, when normally running, the direct current pressure drop that High voltage output electric current produces 0~8V in R4 is exported by c ends.Work as spark
When flashover occurs, High voltage output electric current produces significantly transition, while the pressure drop at R4 two ends also transition therewith.
Fig. 2 mesohighs, which are galvanically isolated, detects that circuit connects c ends and sampled（High-tension current isolation detection circuit is no longer gone to live in the household of one's in-laws on getting married herein
State）After divide two-way, connect run signal process circuit all the way, another road is started to exchange fire colored flashover detection circuit, by R1, R2, R3, R4, C1,
D1 is into detection input circuit, and in normal operation, high-tension current belongs to constant or slowly varying, sampled signal through R1, R3, C1,
The discharge and recharge of R4 loops, D1 is without output, and when spark flashover High voltage output electric current produces significantly transition, sampled voltage also jumps
Become, now C1 two ends produce transition direct impulse voltage, are exported by D1, to the amplification being made up of 1/2U1 and R5, R6, R7, R8
Device is amplified to certain amplitude, is then input to the comparator being made up of 2/2U1 and VR1, R9, and VR1 is supplied to comparator reference electricity
Pressure, 2/2U2 input is accessed by the VR1 reference voltages adjusted（-）End, when 2/2U2 input（+）Hold input pulse magnitude of voltage big
In 2/2U2 input（-）During terminal voltage value, 2/2U2 output end output+15V pulse voltages, it is sensitive that adjustment VR1 can adjust detection
Degree.The R9 of resistance nine is photoelectrical coupler G input current-limiting resistances, and the photoelectrical coupler G of final stage is to isolate defeated with front-end detection circuit
The element gone out, with the connection of the equipment such as convenient microprocessor, the PLC with rear class signal processing apparatus of this case circuit.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (4)
1. a kind of high-voltage DC power supply spark flashover detecting device, it is characterised in that：It comprising high-tension current isolation detection circuit,
Detect input circuit, comparator one, comparator two, photoelectrical coupler；The high-tension current isolation detection circuit connects c ends and adopted
Point two-way, connects run signal process circuit, another road connects detection input circuit, and the detection input circuit is with being compared all the way after sample
Device one is electrically connected with, and the comparator one is electrically connected with comparator two, the comparator one, comparator two respectively with photoelectricity coupling
Clutch input-end, input+end are electrically connected with, and the output end of the photoelectrical coupler electrically connects with wiring j ends, wiring k ends respectively
Connect.
2. a kind of high-voltage DC power supply spark flashover detecting device according to claim 1, it is characterised in that：It is described to connect inspection
Input circuit is surveyed to be made up of resistance one, resistance two, resistance three, resistance four, electric capacity one, diode one.
3. a kind of high-voltage DC power supply spark flashover detecting device according to claim 1, it is characterised in that：The comparison
Device one is made up of amplifier one, resistance five, resistance six, resistance seven, resistance eight.
4. a kind of high-voltage DC power supply spark flashover detecting device according to claim 1, it is characterised in that：The comparison
Two are made up of amplifier two, adjustable resistor one, resistance nine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720022219.0U CN206369785U (en) | 2017-01-07 | 2017-01-07 | A kind of high-voltage DC power supply spark flashover detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720022219.0U CN206369785U (en) | 2017-01-07 | 2017-01-07 | A kind of high-voltage DC power supply spark flashover detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206369785U true CN206369785U (en) | 2017-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720022219.0U Expired - Fee Related CN206369785U (en) | 2017-01-07 | 2017-01-07 | A kind of high-voltage DC power supply spark flashover detecting device |
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| CN (1) | CN206369785U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315443A (en) * | 2017-08-18 | 2017-11-03 | 山东美创生物科技股份有限公司 | It is a kind of electrion is sampled and output switch amount or analog signalses circuit |
| CN116908636A (en) * | 2023-07-17 | 2023-10-20 | 北京中陆汇能科技有限公司 | Spark flashover judging method and circuit based on self-adjusting comparison point |
-
2017
- 2017-01-07 CN CN201720022219.0U patent/CN206369785U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315443A (en) * | 2017-08-18 | 2017-11-03 | 山东美创生物科技股份有限公司 | It is a kind of electrion is sampled and output switch amount or analog signalses circuit |
| CN116908636A (en) * | 2023-07-17 | 2023-10-20 | 北京中陆汇能科技有限公司 | Spark flashover judging method and circuit based on self-adjusting comparison point |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170801 Termination date: 20180107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |