CN209072371U - A kind of electric precipitator pulse power based on intermediate frequency charging - Google Patents
A kind of electric precipitator pulse power based on intermediate frequency charging Download PDFInfo
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- CN209072371U CN209072371U CN201822142928.XU CN201822142928U CN209072371U CN 209072371 U CN209072371 U CN 209072371U CN 201822142928 U CN201822142928 U CN 201822142928U CN 209072371 U CN209072371 U CN 209072371U
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Abstract
The utility model discloses a kind of electric precipitator pulse powers based on intermediate frequency charging, comprising: three-phase main-frequency rectification filtering unit, single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit, impulse generating unit and pulse fundamental power supply superpositing unit；The three phase rectifier filter unit is for will obtain DC voltage after three-phase main-frequency AC low-tension rectifying and wave-filtering；The single-phase mid-frequency inversion unit is used to the DC voltage inversion be midfrequent AC voltage that fundamental wave is 400Hz；The intermediate frequency boosting rectification unit is used to for midfrequent AC voltage boosting being rectified into the DC voltage of 2.3kV；The impulse generating unit is used to the DC voltage forming high voltage pulse, and the high voltage pulse enters electric precipitator and is superimposed with basic voltage.The adjusting of pulse output voltage is realized, it is good to adjust the more convenient stabilization of the pulse power, the linearity.And charge power supply is small in size, saves space cost.
Description
Technical field
The utility model relates to electric precipitator power technique fields more particularly to a kind of electric precipitators based on intermediate frequency charging
Use the pulse power.
Background technique
Electric precipitator (electrostatic precipitator, hereinafter referred to as ESP), which is that thermal power plant is indispensable, matches
Equipment is covered, its function is that the particle dust in boiler emission flue gas is removed, and is discharged into atmosphere to be greatly lowered
Fume amount, be improve environmental pollution, improve the important environmental protection equipment of air quality.
The power supply of electric precipitator is divided into three generations, and first on behalf of SCR power supply, and second on behalf of high frequency electric source, and third is on behalf of pulse
Power supply.Studies have shown that can not only improve ESP dust-collecting efficiency, while the pulse power adds basis when ESP is powered using the pulse power
The total energy consumption of power supply only has 1/5~1/2 when pure direct current supply.Moreover, pulse power supply can preferably be handled than direct current supply it is high
Specific resistance dust and superfine dust.Current ESP powers new technological development direction when therefore, using pulse power supply.
Pulse power stability, the reliability of ESP are to be improved in the prior art.
Utility model content
The utility model provides a kind of electric precipitator pulse power based on intermediate frequency charging, to overcome above-mentioned technology to ask
Topic.
The electric precipitator pulse power that the utility model is charged based on intermediate frequency characterized by comprising
Three-phase main-frequency rectification filtering unit, single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit, high voltage pulse unit
And controller；
The three phase rectifier filter unit is for will obtain DC voltage after three-phase main-frequency AC low-tension rectifying and wave-filtering；It is described
Single-phase mid-frequency inversion unit is used to the DC voltage inversion be alternating voltage that fundamental wave is 400Hz；The intermediate frequency boosting is whole
Stream unit is used to for alternating voltage boosting being rectified into the DC voltage of 2.3KV；The high voltage pulse unit is used for institute
It states DC voltage and forms high voltage pulse, the high voltage pulse enters electric precipitator and is superimposed with basic voltage, the three-phase work
Frequency rectification filtering unit, the single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit and the pulse high-voltage arteries and veins
Unit is rushed to connect with the controller respectively.
Further, the three-phase main-frequency rectification filtering unit includes:
Primary air switch, rectification pre-charge circuit, main contactor, three-phase rectification bridge and filter circuit；
The primary air switchs one end connection three-phase input power supply, and the other end connects the rectification pre-charge circuit and described
Main contactor, the rectification pre-charge circuit connect the three-phase rectification bridge, the three-phase with the output end of the main contactor
The output of rectifier bridge connects the filter circuit.
Further, the single-phase mid-frequency inversion unit includes:
First IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the first driving circuit DR2 and the second driving circuit DR3；
The emitter of first IGBT is connect with after the series connection of the collector of the 2nd IGBT with intermediate frequency rectifier transformer unit,
The emitter of 3rd IGBT is connect with after the series connection of the collector of the 4th IGBT with the intermediate frequency rectifier transformer unit,
The collector of first IGBT is connect with the collector of the 3rd IGBT, the emitter of the 2nd IGBT and the hair of the 4th IGBT
Emitter-base bandgap grading connection.
Further, the intermediate frequency boosting rectification unit includes:
Intermediate frequency step-up transformer, intermediate frequency rectifier bridge, output the first divider resistance Rm4 and the second divider resistance Rm5；
The intermediate frequency step-up transformer pair side is connect with the intermediate frequency rectifier bridge, the intermediate frequency rectification bridge output end with it is described
First divider resistance and the connection of the second divider resistance.
Further, the high voltage pulse unit includes:
Impulse generating unit, pulse transformer BYQ2 and pulse-couple capacitor Cc；
The impulse generating unit includes: charging inductance Lf1, buffer circuit, the 5th IGBT, storage capacitor CS11；
Described charging inductance one end and intermediate frequency boosting rectification unit output end are connect, the charging inductance other end with it is described
The connection of buffer circuit input terminal, the buffer circuit output end connect with collector, the emitter of the 5th IGBT, and described the
The collector of five IGBT is also connect with one end of the storage capacitor, the other end of the storage capacitor and the pulse transformer
Primary side connection, the secondary side of the pulse transformer connect with one end of the pulse-couple capacitor, the pulse-couple capacitor
The other end and load connect.
Further, the impulse generating unit is symmetrical double loop impulse circuit or multiloop impulse circuit.
The utility model is using three-phase main-frequency rectification filtering unit, single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit
The adjusting of pulse output voltage is realized, it is good to adjust the more convenient stabilization of the pulse power, the linearity.And charge power supply is small in size,
Save space cost.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the electric precipitator pulse power structural schematic diagram that the utility model is charged based on intermediate frequency；
Fig. 2 is the intermediate frequency charhing unit circuit diagram of the utility model pulse power；
Fig. 3 is the utility model double loop pulse shaping circuit circuit diagram；
Fig. 4 is the utility model multiloop pulse shaping circuit circuit diagram.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Fig. 1 is the electric precipitator pulse power structural schematic diagram that the utility model is charged based on intermediate frequency, as shown in Figure 1,
The electric precipitator pulse power of the present embodiment, comprising:
Three-phase main-frequency rectification filtering unit 101, single-phase mid-frequency inversion unit 102, intermediate frequency boosting rectification unit 103, high electricity
Press pulse unit 104 and controller 105；
The three-phase main-frequency rectification filtering unit is used to that DC voltage will to be obtained after the filtering of three-phase alternating current lower pressure rectifier；It is described
Single-phase mid-frequency inversion unit is used to the DC voltage inversion be alternating voltage that fundamental wave is 400Hz；The intermediate frequency boosting is whole
Stream unit is used to for alternating voltage boosting being rectified into the DC voltage of 2.3kV；The high voltage pulse unit is used for institute
It states DC voltage and forms high voltage pulse, the high voltage pulse enters electric precipitator and is superimposed with basic voltage, and the three-phase is whole
Flow filter unit, the single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit and the pulse high-voltage pulse list
Member is connect with the controller respectively.
Further, the three phase rectifier filter unit includes:
Primary air switch, rectification pre-charge circuit, main contactor, three-phase rectification bridge and filter circuit；
The primary air switchs one end connection three-phase input power supply, and the other end connects the rectification pre-charge circuit and described
Main contactor, the rectification pre-charge circuit connect the three-phase rectification bridge, the three-phase with the output end of the main contactor
The output of rectifier bridge connects the filter circuit.
Specifically, as shown in Fig. 2, this implementation three phase rectifier filter unit includes: air switch 1, rectification precharge electricity
Road 2, main contactor 3, three-phase rectification bridge 4, filter circuit 5, medium frequency inverter circuit 6, intermediate frequency step-up transformer and rectifier bridge 7.
Further, the single-phase mid-frequency inversion unit includes:
First IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the first driving circuit DR2 and the second driving circuit DR3；
The emitter of first IGBT is connect with after the series connection of the collector of the 2nd IGBT with intermediate frequency rectifier transformer unit,
The emitter of 3rd IGBT is connect with after the series connection of the collector of the 4th IGBT with the intermediate frequency rectifier transformer unit,
The collector of first IGBT is connect with the collector of the 3rd IGBT, the emitter of the 2nd IGBT and the hair of the 4th IGBT
Emitter-base bandgap grading connection.
Further, the intermediate frequency boosting rectification unit includes:
Intermediate frequency step-up transformer, intermediate frequency rectifier bridge, output the first divider resistance Rm4 and the second divider resistance Rm5；
The intermediate frequency step-up transformer pair side is connect with the intermediate frequency rectifier bridge, the intermediate frequency rectification bridge output end with it is described
First divider resistance and the connection of the second divider resistance.
Further, the high voltage pulse unit includes:
Impulse generating unit, pulse transformer BYQ2 and pulse-couple capacitor Cc；
The impulse generating unit includes: charging inductance Lf1, buffer circuit, the 5th IGBT, storage capacitor CS11；
Described charging inductance one end and intermediate frequency boosting rectification unit output end are connect, the charging inductance other end with it is described
The connection of buffer circuit input terminal, the buffer circuit output end connect with collector, the emitter of the 5th IGBT, and described the
The collector of five IGBT is also connect with one end of the storage capacitor, the other end of the storage capacitor and the pulse transformer
Primary side connection, the secondary side of the pulse transformer connect with one end of the pulse-couple capacitor, the pulse-couple capacitor
The other end and load connect.
Further, the impulse generating unit is symmetrical double loop impulse circuit or multiloop impulse circuit.
Specifically, direct current basis high voltage power supply 16 and the pulse power are using Cc pairs of coupling inductance Lc and pulse-couple capacitor
Claim isolation.Impulse generating unit: intermediate frequency boosting rectification unit is exported into 2.3kV voltage, passes through charging inductance and pulse transformer
Primary side is that the storage capacitor of impulse generator is powered, when high pressure IGBT conducting, the electric discharge of storage capacitor pulse transformer, and shape
It boosts at voltage pulse, then through pulse transformer, forms high voltage pulse, enter electric precipitator and base through pulse coupled capacitor Cc
Plinth voltage superposition.
Specifically, as shown in figure 3, charging inductance 8, buffer circuit 9, pulse switch 10, storage capacitor 11, pulse transforming
Device 12, pulse-couple capacitor 13, ESP14, fundamental power supply coupling inductance 15, fundamental power supply 16.
The present embodiment double loop impulse generating unit reduces the peak point current of impulse generating unit, make pulse switch it is stable,
Reliability service.Multiloop pulse shaping circuit schematic diagram is as shown in Figure 4.
Table 1 is the comparison result table of the application and three kinds of charging modes of the pulse power in the prior art.
Table 1
It can be seen that having the beneficial effect that for the application from above-mentioned comparison
1) intermediate frequency charge control is linearly spent, and volume, weight are small, high reliablity, is optimal pulse charge power supply.
2) using the pulse power scheme in bis- (more) circuit pulse shaping circuits, reliability and realizability are improved；
3) using the high pressure IGBT switch buffer circuit specially designed, reliable, the stable fortune of high pressure IGBT switch is realized
Row；
4) using pulse voltage divider (RC divider), pulses of current sensor (Hall sensor) signal sampling electricity
Road realizes high-precision output impulse sampling；
5) soft and hardware combination is used, pulse voltage, the detection of current waveform (peak value) and the inspection of electric field flashover are realized
It surveys；
6) the accurate control and pulse parameter, electric field ginseng of the pulse power may be implemented in analysis, calculating based on high-speed dsp s
Several real-time calculating and display (can show electric field load capacitance, load average apparent energy)；
7) basic voltage source can work in continuation mode or slotted mode, wherein slotted mode (or single-phase SCR power supply)
When, the pulse power has following features:
Pulse can automatically track gap peak value (or single-phase SCR supply voltage peak value), realize maximum voltage power supply.Basic electricity
Source work is powered in gap, becomes apparent from pulse power system energy-saving effect.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (6)
1. a kind of electric precipitator pulse power based on intermediate frequency charging characterized by comprising
Three-phase main-frequency rectification filtering unit, single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit, high voltage pulse unit and
Controller；
The three-phase main-frequency rectification filtering unit is for will obtain DC voltage after three-phase main-frequency AC low-tension rectifying and wave-filtering；It is described
Single-phase mid-frequency inversion unit is used to the DC voltage inversion be midfrequent AC voltage that fundamental wave is 400Hz；The intermediate frequency liter
Pressure rectification unit is used to for midfrequent AC voltage boosting being rectified into the DC voltage of 2.3kV；The high voltage pulse unit
For the DC voltage to be formed high voltage pulse, the high voltage pulse enters electric precipitator and is superimposed with basic voltage, institute
State three-phase main-frequency rectification filtering unit, the single-phase mid-frequency inversion unit, intermediate frequency boosting rectification unit and the pulse
High voltage pulse unit is connect with the controller respectively.
2. the pulse power according to claim 1, which is characterized in that the three-phase main-frequency rectification filtering unit includes:
Primary air switch, rectification pre-charge circuit, main contactor, three-phase rectification bridge and filter circuit；
The primary air switchs one end connection three-phase main-frequency input power, and the other end connects the rectification pre-charge circuit and described
Main contactor, the rectification pre-charge circuit connect the three-phase rectification bridge, the three-phase with the output end of the main contactor
The output of rectifier bridge connects the filter circuit.
3. the pulse power according to claim 1, which is characterized in that the single-phase mid-frequency inversion unit includes:
First IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the first driving circuit DR2 and the second driving circuit DR3；
The emitter of first IGBT is connect with after the series connection of the collector of the 2nd IGBT with intermediate frequency rectifier transformer unit, described
The emitter of 3rd IGBT is connect with after the series connection of the collector of the 4th IGBT with the intermediate frequency rectifier transformer unit, described
The collector of first IGBT is connect with the collector of the 3rd IGBT, the emitter of the 2nd IGBT and the emitter of the 4th IGBT
Connection.
4. the pulse power according to claim 1, which is characterized in that intermediate frequency boosting rectification unit includes:
Intermediate frequency step-up transformer, intermediate frequency rectifier bridge, output the first divider resistance Rm4 and the second divider resistance Rm5；
The intermediate frequency step-up transformer pair side is connect with the intermediate frequency rectifier bridge, the intermediate frequency rectification bridge output end and described first
Divider resistance and the connection of the second divider resistance.
5. the pulse power according to claim 1, which is characterized in that the high voltage pulse unit includes:
Impulse generating unit, pulse transformer BYQ2 and pulse-couple capacitor Cc；
The impulse generating unit includes: charging inductance Lf1, buffer circuit, the 5th IGBT, storage capacitor CS11；
Described charging inductance one end is connect with intermediate frequency boosting rectification unit output end, the charging inductance other end and the buffering
Circuit input end connection, the buffer circuit output end are connect with collector, the emitter of the 5th IGBT, and the described 5th
The collector of IGBT is also connect with one end of the storage capacitor, the other end of the storage capacitor and the pulse transformer
Primary side connection, the secondary side of the pulse transformer are connect with one end of the pulse-couple capacitor, the pulse-couple capacitor
The other end and load connect.
6. the pulse power according to claim 1, which is characterized in that the impulse generating unit is symmetrical double loop pulse
Circuit or multiloop impulse circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822142928.XU CN209072371U (en) | 2018-12-19 | 2018-12-19 | A kind of electric precipitator pulse power based on intermediate frequency charging |
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| CN201822142928.XU CN209072371U (en) | 2018-12-19 | 2018-12-19 | A kind of electric precipitator pulse power based on intermediate frequency charging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462344A (en) * | 2018-12-19 | 2019-03-12 | 武汉大学 | A kind of electric precipitator pulse power based on intermediate frequency charging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109462344A (en) * | 2018-12-19 | 2019-03-12 | 武汉大学 | A kind of electric precipitator pulse power based on intermediate frequency charging |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Yunfeng Inventor after: Zhang Haifeng Inventor after: Ji Yunjiang Inventor before: Jiang Yunfeng Inventor before: Zhang Haifeng Inventor before: Ji Yunjiang Inventor before: Tan Ruisheng |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210112 Address after: 430000 Hubei city of Wuhan province Wuchang Luojiashan Patentee after: WUHAN University Patentee after: Dalian Jinlida Electronic Technology Co.,Ltd. Address before: 430000 Hubei city of Wuhan province Wuchang Luojiashan Patentee before: WUHAN University Patentee before: DALIAN LAN QIAO ELECTRONIC TECHNOLOGY Co.,Ltd. |