CN103028494B - A kind of electrostatic precipitation pulse power source control system - Google Patents
A kind of electrostatic precipitation pulse power source control system Download PDFInfo
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- CN103028494B CN103028494B CN201210554680.2A CN201210554680A CN103028494B CN 103028494 B CN103028494 B CN 103028494B CN 201210554680 A CN201210554680 A CN 201210554680A CN 103028494 B CN103028494 B CN 103028494B
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Abstract
The invention discloses a kind of electrostatic precipitation pulse power source control system, it includes major loop, controller and triggers driving sampling circuit, and major loop includes the first loop that cleaner unit provides a continuous print fundamental voltage and cleaner unit provides the second servo loop of a pulse voltage being interrupted；Controller controls this fundamental voltage full breakdown voltage less than the electric discharge of cleaner unit electric field inside spark, and controller controls 35 times that this pulse voltage is fundamental voltage.The voltage of native system output is big, and during cleaner unit spark discharge, without the turn-off time, electric field energy recovers fast, and inverse corona can be overcome on-the-spot, obvious especially for the fine dusts dust collection effect in electric precipitation；Operating frequency is high, and power factor is big, and three phase mains is powered, three-phase grid balance, few to the harmonic pollution of electrical network, more decreases the volume and weight of transformator, saves consumptive material.
Description
Technical field
The present invention relates to electric cleaner field, especially relate to a kind of electrostatic precipitation pulse power
Control system.
Background technology
Electric cleaner is a kind of flue gas purifying equipment, and its operation principle is: dust dirt in flue gas
When grain is by high-voltage electrostatic field, collide with interelectrode negative ions and electronics and charged
(or charged in ion diffusion motion), on band, the grit of electronics and ion is at the work of electric field force
With lower anisotropy electrode movement and long-pending be attached on opposite electrode, made on electrode by modes such as rappings
Dust fall into collection ash bucket in, make the flue gas by electric cleaner be purified, reach protection
Air, the purpose of protection environment.
Conventional electrostatic dedusting power supply mode, has Thyristor Controlled voltage regulating rectifier to power the most both at home and abroad
Device, it has the advantages such as simple in construction, capacity are big, but also has some shortcomings: 1, work
Frequency is power frequency 50Hz (external or for 60Hz), and frequency is low, conversion efficiency as little as 75%, consumption
Take electric energy；2, low due to operating frequency, transformator and filtering device volume is big, weight is big,
Expend substantial amounts of iron and steel and copper material；3, power supply input loads injustice for biphase electricity for electrical network
Weighing apparatus, is again power frequency phase control, and not only power factor is low, and input/output terminal all contains greatly
The low-order harmonic that amount is difficult to filter pollutes, and the interference to electrical network is big.4: IGCT is half control type
Device, can not adjust output voltage immediately when spark discharge or short circuit, and dynamic responding speed is slow.
5: output ripple is big, causes corona voltage low, and waveform is again single power frequency ripple so that nothing
Method adapts to the operating mode of high specific resistance, it is difficult to reach the new demand of field of Environment Protection dust emission.Above-mentioned
Reason becomes the bottleneck that present conventional electrostatic dedusting power supply performance improves further, along with country is right
The raising of environmental requirement, conventional electrostatic dedusting is difficult to meet country for electric cleaner and wants environmental protection
Ask.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, it is provided that a kind of use safely and can effectively be gone
Electrostatic precipitation pulse power source control system except high resistivity dust.
To achieve these goals, the present invention is by the following technical solutions: a kind of electrostatic precipitation arteries and veins
Rushing power control system, it includes major loop, controller and triggers driving sampling circuit, leads back
Road includes the first loop that cleaner unit provides a continuous print fundamental voltage and provides cleaner unit
The second servo loop of one pulse voltage being interrupted；Controller controls this fundamental voltage less than cleaner unit electricity
The full breakdown voltage of field inside spark electric discharge, it is fundamental voltage that controller controls this pulse voltage
3-5 times；Described first loop includes that the first rectifier bridge, the first inverter circuit and the first high frequency become
Voltage rectifier, filtered three-phase alternating voltage is rectified into DC voltage by the first rectifier bridge,
This DC voltage is converted into the high frequency rectangular alternating current wave pressure of 0-50KHZ by the first inverter circuit,
This high frequency rectangular alternating current wave pressure is carried out boosting by the first high frequency Transformer Rectifier circuit, rectifying and wave-filtering
The described fundamental voltage of rear output is to cleaner unit；Described second servo loop include controllable silicon unit, second
Rectifier bridge, the second inverter circuit and the second high frequency Transformer Rectifier circuit, the second rectifier bridge will filtering
After three-phase alternating voltage be rectified into DC voltage, this DC voltage is changed by the second inverter circuit
Becoming the high frequency rectangular alternating current wave pressure of 0-50KHZ, the second high frequency Transformer Rectifier circuit is by this high frequency
Square wave ac pressure carries out boosting, after rectifying and wave-filtering voltage pulse output to cleaner unit；Described
Trigger and drive sampling circuit to be connected with controller, the most defeated for gathering the transformator on cleaner unit
The secondary voltage gone out and secondary current, and feed back to controller, controller receives this feedback letter
Combine the control parameter set on controller after number, control silicon controlled in controllable silicon unit and lead
Current flow angle, to control the amplitude of described pulse voltage；Controller is by controlling the second inverter circuit
Open and shut off the time, to control time of delivery and the interval of described pulse voltage；It is reciprocal with this,
It is fundamental voltage superposition one pulse voltage by phased manner；Described first inverter circuit and the second inversion
IGBT igbt that circuit is connected by four bridge-types, series resonance inductor
Lr1, series resonant capacitance Cr1 are constituted；Described triggering drives sampling circuit to include primary current
Sample circuit, is acquired the electric current of second servo loop primary side by primary current transformer, and will
Data feedback is to controller；Secondary voltage sample circuit, is acquired output by sample resistance
Secondary voltage, and by data feedback to controller；Secondary current sample circuit, gathers output
Secondary current, and by data feedback to controller.If the feedback signal-two that controller receives
Secondary voltage pulsation descent amplitude is relatively big, then be judged as spark discharge；Or secondary current detected
Rising amplitude relatively big, be also judged as spark discharge；When controller receives the letter of spark discharge
Number time, controller gets started cut out controllable silicon unit and the second inverter circuit, makes second servo loop
Stopping output heavy current pulse voltage, dynamic responding speed is the fastest；Controller drives triggering
The data that sampling circuit collects detect in real time, decline according to secondary voltage moment in loop
The amplitude that amplitude and secondary current moment rise, judges whether that flashing discharges, such as, exists
The secondary voltage data collected in period 1 are U1, collecting data second round is U2,
U1-U2＞ 10kV, then be judged as spark discharge；When the secondary current of equipment maximum range is
Imax, the real-time secondary current data collected when controller are I ＞ 1.2Imax, then it is judged as
Spark discharge.
Described controller includes digital signal processor, switch QS2 and controls transformator TC1,
Three phase network power supply biphase by switch QS2, control transformator TC1 to Digital Signal Processing
Device is powered.
Further, described controllable silicon unit includes three bidirectional triode thyristors and double for triggering
To the triggering circuit of controlled silicon conducting, described triggering circuit includes forceful electric power and vulnerabilities scan part
Two pulse transformers T1, the T2 kept apart, by four diode V26, V27, V28,
The shaping circuit that V29 is constituted, by resistance R32, electric capacity C5, electric capacity C6, electric capacity C7, electricity
Hold C8, resistance R33 and the rc filter circuit of varistor RV composition.
Described first high frequency Transformer Rectifier circuit and the second high frequency Transformer Rectifier circuit are high by one
Frequency power transformer and a high-frequency rectification module composition.
The IGBT that described first inverter circuit and the second inverter circuit are connected by four bridge-types is exhausted
Edge grid bipolar transistor, series resonance inductor Lr1, series resonant capacitance Cr1 are constituted.
Described major loop also includes circuit breaker Q F, catalyst KM, filtration module, three phase network
Power supply after circuit breaker Q F, catalyst KM, filtration module respectively with described first loop,
Second servo loop connects.
Supplied to cleaner unit by a damping resistance after described fundamental voltage and big pulse voltage superposition
Electricity.
The present invention uses one to surpass far away less than one amplitude of superposition on the fundamental voltage of breakdown voltage
Crossing the pulse voltage of breakdown voltage, fundamental voltage is constantly in duty, and pulse voltage is then
Superposing with fundamental voltage for discontinuity, the voltage magnitude of pulse voltage is very big, but pulse width
The narrowest, electric field two interpolar does not the most have enough time to get through, and pulse just has finished on, and so ionizes
Son just can rest between the two poles of the earth, makes dust charged raising dust removing effects, especially to height ratio
The trapping of resistance dust, its electric precipitation effect is more preferable.When controller is when spark discharge being detected,
First loop still starts work, only turns off second servo loop and exports big pulse voltage, by controlling
Three silicon controlled conductings of the input of second servo loop and the second inverter circuit of second servo loop
Open the shutoff controlling second servo loop, thus when ensure that spark discharge, inside cleaner unit still
So with the presence of a fundamental voltage, thus improve the dust-collecting efficiency of electric precipitation.
In sum, the invention have the advantages that the voltage that native system exports is big, cleaner unit
During spark discharge, without the turn-off time, electric field energy recovers fast, and inverse corona can be overcome on-the-spot, special
It not obvious for the fine dusts dust collection effect in electric precipitation；Operating frequency is high, power factor
Greatly, three phase mains is powered, three-phase grid balance, few to the harmonic pollution of electrical network, more decreases
The volume and weight of transformator, saves consumptive material；The the second inverter circuit switching speed used is fast,
Adjust output voltage immediately when spark discharge or short circuit, make power supply have dynamic response characteristic.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention.
Fig. 2 is the schematic diagram of the controllable silicon unit of the present invention.
Detailed description of the invention
In order to make those skilled in the art be better understood from the present invention program, below in conjunction with this
Accompanying drawing in inventive embodiments, carries out clear, complete to the technical scheme in the embodiment of the present invention
Description.
As shown in Figure 1-2, a kind of electrostatic precipitation pulse power source control system, it include major loop,
Controller and triggering drive sampling circuit, and major loop includes cleaner unit provides a continuous print first-harmonic
First loop of voltage and the second servo loop of the pulse voltage to cleaner unit offer one interruption；Control
Device controls this fundamental voltage full breakdown voltage less than the electric discharge of cleaner unit electric field inside spark, controls
Device controls 3 times that heavy current pulse voltage is fundamental voltage, and is superimposed upon on fundamental voltage,
Greatly up to for 3-5 times of fundamental voltage, the most greatly, but pulse width is the narrowest, two interpolars
The most not having enough time to get through, pulse just has finished on, and such electron ion just can rest on two
Between pole, make dust charged raising dust removing effects, the especially trapping to high resistivity dust,
Its electric precipitation effect is fine.
Three-phase 380V electric network source inputs, through circuit breaker Q F of major loop, catalyst KM, three
After phase filter inductance (Lu, Lv, Lw), three-phase filter capacitor (Cu, Cv, Cw), respectively
The first loop in parallel and second servo loop to precipitator energisation, three-phase filter inductance (Lu,
Lv, Lw, LQ) power factor (PF) of equipment can be improved, its Electro Magnetic Compatibility is good, three-phase equilibrium；
Parallel resistance R1 on catalyst KM, R2, R3, play the effect of buffering.The most described
By a damping resistance R7 to precipitator energisation after fundamental voltage and pulse voltage superposition.
First loop includes that the first rectifier bridge K1, the first inverter circuit and the first high frequency transformation are whole
Current circuit, the first rectifier bridge K1 will be through three-phase filter inductance and filter capacitor filtered three
Cross streams voltage commutation becomes DC voltage, and this DC voltage is converted into by the first inverter circuit
The high frequency rectangular alternating current wave pressure of 0-50KHZ, the first high frequency Transformer Rectifier circuit is by this high frequency square
Shape alternating current wave pressure carries out boosting, export described fundamental voltage to cleaner unit after rectifying and wave-filtering；The
Secondary circuit includes controllable silicon unit the 3, second rectifier bridge K2, the second inverter circuit and the second high frequency
Transformer Rectifier circuit, filtered three-phase alternating voltage is rectified into direct current by the second rectifier bridge K2
Voltage, this DC voltage is converted into the high frequency rectangular ripple exchange of 0-50KHZ by the second inverter circuit
Voltage, this high frequency rectangular alternating current wave pressure carries out boosting by the second high frequency Transformer Rectifier circuit, whole
After stream filtering, voltage pulse output is to cleaner unit.
Described controller includes digital signal processor 1, switch QS2 and controls transformator TC1,
Three phase network power supply biphase by switch QS2, control transformator TC1 to Digital Signal Processing
Device is powered.Described digital signal processor uses the digital signal with the DSP of 32 as core
Processing controller, has faster CPU, the memorizer of more capacity, has data at a high speed
Operational capability.
Described triggering drives sampling circuit to be connected with controller, for gathering the transformation on cleaner unit
Secondary voltage that device exports in real time and secondary current, and feed back to controller, controller receives
Combine controller parameter after this feedback signal to arrange and can control silicon controlled in controllable silicon unit
The angle of flow, to control the amplitude of described pulse voltage, controller is by controlling the second inverter circuit
Open and shut off the time, to control time of delivery and the interval of described pulse voltage；Past with this
Multiple, it is fundamental voltage superposition one pulse voltage by phased manner.
Described triggering drives sampling circuit to include primary current sample circuit, by primary current mutual inductance
Device is acquired the electric current of second servo loop primary side, and by data feedback to controller；Secondary electricity
Pressure sample circuit, is acquired the secondary voltage of output, and is given by data feedback by sample resistance
Controller；Secondary current sample circuit, is acquired the secondary current of output by sample resistance,
And by data feedback to controller；Described triggering drives sampling circuit to be connected with controller, is used for
Gather secondary voltage and secondary current that the transformator on cleaner unit exports in real time, and feed back to control
Device processed, after controller receives this feedback signal, arranges control controllable silicon in conjunction with controller parameter
The silicon controlled angle of flow in unit 3, to control the amplitude of described pulse voltage, controller passes through
Control the second inverter circuit opens and shuts off the time, during to control the conveying of described pulse voltage
Between and interval；Reciprocal with this, it is fundamental voltage superposition one pulse voltage by phased manner.
Described controllable silicon unit 3 includes three bidirectional triode thyristors and leads for triggering bidirectional triode thyristor
Logical triggering circuit, triggering circuit includes two forceful electric power and vulnerabilities scan part kept apart
Pulse transformer T1, T2, the shaping being made up of four diodes V26, V27, V28, V29
Circuit, by resistance R32, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R33,
And the rc filter circuit of varistor RV composition.Each bidirectional triode thyristor triggers circuit with it
Catenation principle figure as in figure 2 it is shown, each controllable silicon trigger with it circuit connection diagram be as figure
Shown in 2.Pulse transformer is first passed through from Digital Signal Processing controller 1 control pulse out
T1, T2, then through diode V26, V27, V28, V29 shaping circuit below, the most directly
Controllable silicon unit 3 is sent out in contact.
Described first high frequency Transformer Rectifier circuit is by a high frequency transformer TM1 and a high-frequency rectification
Module composition, the second high frequency Transformer Rectifier circuit is whole by a high frequency transformer TM2 and another high frequency
Flow module is constituted.Described first inverter circuit and the second inverter circuit are connected by four bridge-types
IGBT igbt, series resonance inductor Lr1, series resonant capacitance Cr1 are constituted.
Triggering the parameter driving sampling circuit to sample is that Digital Signal Processing controller spark is sentenced
Disconnected foundation, controller detects in real time and samples the secondary voltage of returning, secondary current data, such as
The secondary voltage data collected within the period 1 are U1, collecting data second round is
U2, U1-U2＞ 10kV, then be judged as spark discharge；Secondary current when equipment maximum range
For Imax, the real-time secondary current data collected when controller are I ＞ 1.2 × Imax, then sentence
Break as spark discharge.
The work process of the first inverter circuit in the first loop: Digital Signal Processing controller by
Touch screen, digital control unit forms.By controlling the start touch key-press of touch screen, then root
Determine the IGBT's in loop one by different algorithms according to the mode of operation set and control mode
Dutycycle, after opening of device, controller controls output IGBT and triggers pulse, first drives IGBT
Igbt Q1, Q4 turn on, DC voltage through igbt Q1,
High frequency transformer TM1, series resonant capacitance Cr1, series resonance inductor Lr1, insulated gate are double
Gated transistors Q4 charges to series resonant capacitance Cr1, forms the positive half-wave of sinusoidal current,
The voltage of series resonant capacitance Cr1 reaches maximum, after charging current is zero, controller according to
Trigger signal and turn off the igbt of Q1, Q4, the electricity of series resonant capacitance Cr1
Press the diode on high frequency transformer TM1, igbt Q1, insulated gate double
Diode on gated transistors Q4, series resonance inductor Lr1, series resonant capacitance Cr1 are put
Electricity, forms the negative half-wave of sinusoidal current, after negative half-wave terminates, because Q1, Q4 fail again
Opening, loop current is zero；Then controller controls Q2, Q3 conducting, series resonant capacitance
Cr1 is inverted charging, and work process is as hereinbefore.Controller control Q1, Q4 alternately
Turn on Q2, Q3, make the first loop provides a fundamental voltage for cleaner unit always.
The work process of the second inverter circuit in second servo loop: Digital Signal Processing controller by
Touch screen, digital control unit forms.By controlling the start touch key-press of touch screen, then root
Leading of three-phase controllable silicon is determined by different algorithms according to the mode of operation set and control mode
Current flow angle and the dutycycle of IGBT, and send corresponding three-phase controllable silicon angle of flow triggering signal；
After equipment the first loop normally works, open Digital Signal Processing controller and start internal timing
Device, timer time arrives, and first controls igbt Q5, Q8 conducting, unidirectional current
Pressure is through igbt Q5, high frequency transformer TM2, series resonant capacitance Cr2, string
Connection resonant inductance Lr2, igbt Q8 charge to series resonant capacitance Cr2,
Forming the positive half-wave of sinusoidal current, the voltage at series resonant capacitance Cr2 reaches maximum, fills
Electricity is after electric current is zero, controller according to fixed trigger drive sample circuit to gather signal shutoff Q5,
Q8, the voltage of series resonant capacitance Cr2 diode on igbt Q5,
Diode on igbt Q8, series resonance inductor Lr2, series resonance electricity
Hold Cr2, high frequency transformer TM2 electric discharge, form the negative half-wave of sinusoidal current, boosted rectification
One heavy current pulse voltage of rear formation, superposition is to being precipitator energisation together after fundamental voltage.
After the positive and negative half-wave of sinusoidal current terminates, because of igbt Q5, insulated gate bipolar
Transistor Q8 fails to be again turned on, igbt Q4, igbt
Q6 is also not turned on, and whole second servo loop electric current is zero, stops the supply of big pulse voltage；
When the intervalometer in controller restarts timing then, it is double that controller just starts to control insulated gate
Gated transistors Q4, Q6 turn on, and series resonant capacitance Cr2 is inverted charging, its work process
As hereinbefore, loop occurs big pulse voltage again, but pulse width is the narrowest, the two poles of the earth
Between the most do not have enough time to get through, pulse just has finished on, and such electron ion just can rest on
Between the two poles of the earth, make dust charged raising dust removing effects, the especially trapping to high resistivity dust,
Its electric precipitation effect is fine.Repeat according to this, controller by three bidirectional triode thyristor angles of flow and
Control the dutycycle of IGBT, the amplitude changing pulse voltage and the generation frequency producing big pulse
Rate size.
Concrete enforcement is as follows: the first loop controls the pulse duty factor of IGBT by controller,
Output IGBT triggers pulse, drives plate directly to drive IGBT insulated gate bipolar brilliant through IGBT
Body pipe Q1～Q4.First inverter circuit is converted to the high frequency rectangular ripple of 0～50KHz DC voltage
Alternating voltage exports high direct voltage voltage after delivering to high frequency high voltage transformer, rectifying and wave-filtering.Second
Three bidirectional triode thyristor (V1, V2, V3, V4, V5, V6) angles of flow are passed through in loop control unit
With the pulse duty factor of control IGBT, output IGBT triggers pulse, drives plate through IGBT
Directly drive IGBT igbt Q5～Q8.Second inverter circuit is DC voltage
The high frequency rectangular alternating current wave being converted to 0～50KHz is sent to high frequency high voltage transformer, rectification filter
Export high direct voltage big pulse current and power supply after ripple, but pulse width is the narrowest, electric field two interpolar
The most not having enough time to get through, pulse just has finished on.The DC high-voltage power supply of output is loop
One and loop two sum.When spark occurs, trigger the secondary electricity driving sampling circuit to sample
Pressure or secondary current occur abnormal, feed back to controller, and controller judges to immediately close off
Igbt Q5-Q8, the large pluse closing second servo loop rushes high-tension current potential.When
After the time set in intervalometer, then export the big pulsed high-voltage in second servo loop
Stream voltage.The fundamental voltage in the first loop keeps constant, thus ensure that internal, locates all the time
In the case of a first-harmonic high-voltage dc voltage, second servo loop triggers and produces output heavy current pulse electricity
Pressure, is not detected by ordinary times when spark occurs waiting field condition for bigger than resistance, has good
Dust-collecting efficiency.
This Digital Signal Processing controller is the high speed with the DSP of 32 as core, high-performance,
Jumbo nonshared control unit, has processing speed fast, and function is strong, simple in construction, peripheral unit
Part is few, high reliability.Employing touch screen shows, operational factor shows more directly perceived, repaiies
Change more convenient operation quick.Spark judgment technology is advanced, can extremely accurate judge flashover, and
Make optimization process.Flashover processes and realizes voltage of electric field recovery soon, loses minimum, and can have
Effect overcomes the generation of inverse corona, provides maximum effective corona discharge power to electric field, thus stably carries
High efficiency of dust collection.Point all-wave, intermittent power supply dpd mode, totally six kinds of operations in the method for operation
Mode.And be optimized with program by programming expert, simplify operation, strengthen artificial intelligence's mould
Sticking with paste and control, the use making equipment is convenient.There is overvoltage and overcurrent control fast and accurately
Measure processed, it is ensured that equipment occurs without output overvoltage phenomenon in running and output overcurrent is existing
As.There is perfect short circuit, open circuit, the fault detection capabilities such as mistake flows, super oil temperature, equipment
Protect more sophisticated.EPAC (Electrostatic Precipitator Auto is had in system
Control) software, the change of the electrical characteristics that can be caused according to the operating mode of change, automatically select
Select optimal current limitation and charge ratio, thus the cleaning of beneficially pole plate polar curve, make discharge capacity
Minimum, and the rectification change energy consumption of more than 30% can be saved.Strengthening network system controls.Pass through
Distance net technology, utilizes centralized control (IPC) system, and technical staff can exist at a distance
Line observation voltage, current waveform, electric field dynamic U-I curve, can be to inverse corona, corona blocks,
Generation and the program of the operating modes such as electric field dust stratification are made and being judged accurately, and are adjusted to by parameter characteristic
Good state.During with centralized control (IPC) systems connection, the real-time of device systems can be monitored
Controlling controlled state, all functions all can distant control.Equipment reserves A/D, I/O and letter
Number transmitter interface, to meet the realization of producer's scene particular/special requirement.
Obviously, described embodiment is only a part of embodiment of the present invention rather than complete
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, all should belong to the present invention and protect
The scope protected.
Claims (6)
1. an electrostatic precipitation pulse power source control system, it is characterised in that: it includes leading back
Road, controller and triggering drive sampling circuit, and major loop includes providing cleaner unit
First loop of one continuous print fundamental voltage and the pulse to cleaner unit offer one interruption
The second servo loop of voltage；Controller controls this fundamental voltage less than in cleaner unit electric field
The full breakdown voltage of portion's spark discharge, it is first-harmonic electricity that controller controls this pulse voltage
3-5 times of pressure；Described first loop includes the first rectifier bridge, the first inverter circuit
And the first high frequency Transformer Rectifier circuit, the first rectifier bridge is by filtered three-phase alternating current
Voltage commutation becomes DC voltage, and this DC voltage is converted into by the first inverter circuit
The high frequency rectangular alternating current wave pressure of 0-50KHZ, the first high frequency Transformer Rectifier circuit will
This high frequency rectangular alternating current wave pressure carries out boosting, export described first-harmonic after rectifying and wave-filtering
Voltage is to cleaner unit；Described second servo loop include controllable silicon unit, the second rectifier bridge,
Second inverter circuit and the second high frequency Transformer Rectifier circuit, the second rectifier bridge will filtering
After three-phase alternating voltage be rectified into DC voltage, the second inverter circuit is by this direct current
Voltage is converted into the high frequency rectangular alternating current wave pressure of 0-50KHZ, the second high frequency transformation
This high frequency rectangular alternating current wave pressure is carried out boosting by rectification circuit, defeated after rectifying and wave-filtering
Go out pulse voltage to cleaner unit；Described triggering drives sampling circuit to be connected with controller,
For gathering secondary voltage and the secondary current of output in real time on cleaner unit, and feed back
To controller, controller controls after receiving this feedback signal can in controllable silicon unit
The angle of flow of control silicon, to control the amplitude of described pulse voltage；Controller is by control
That makes the second inverter circuit opens and shuts off the time, to control described pulse voltage
Time of delivery and interval；Reciprocal with this, it is fundamental voltage superposition one arteries and veins by phased manner
Rush voltage；Described first inverter circuit and the second inverter circuit are by four bridge-types even
The IGBT igbt that connects, series resonance inductor Lr1, series resonance
Electric capacity Cr1 is constituted；Described triggering drives sampling circuit to include primary current sampling electricity
Road, is acquired the electric current of second servo loop primary side by primary current transformer, and
By data feedback to controller；Secondary voltage sample circuit, is carried out by sample resistance
Gather the secondary voltage of output, and by data feedback to controller；Secondary current takes
Sample circuit, gathers the secondary current of output, and by data feedback to controller.
A kind of electrostatic precipitation pulse power source control system the most according to claim 1, its
It is characterised by: described controller includes digital signal processor, switch QS2 and control
Transformator TC1 processed, three phase network power supply biphase by switch QS2, control transformation
Device TC1 powers to digital signal processor.
A kind of electrostatic precipitation pulse power source control system the most according to claim 2, its
It is characterised by: described controllable silicon unit includes three bidirectional triode thyristors and for triggering
The triggering circuit of bidirectional triode thyristor conducting, described triggering circuit includes forceful electric power with weak
Two pulse transformers T1, T2 that the collecting of electrical controls is kept apart, by four two poles
The shaping circuit that pipe V26, V27, V28, V29 are constituted, by resistance R32, electric capacity
C5, electric capacity C6, electric capacity C7, electric capacity C8, resistance R33 and varistor RV
The rc filter circuit of composition.
A kind of electrostatic precipitation pulse power source control system the most according to claim 3, its
It is characterised by: described first high frequency Transformer Rectifier circuit and the second high frequency Transformer Rectifier
Circuit is by a high frequency transformer and a high-frequency rectification module composition.
A kind of electrostatic precipitation pulse power source control system the most according to claim 4, its
It is characterised by: described major loop also includes circuit breaker Q F, catalyst KM, filtering mould
Block, three phase network power supply divides after circuit breaker Q F, catalyst KM, filtration module
It is not connected with described first loop, second servo loop.
A kind of electrostatic precipitation pulse power source control system the most according to claim 5, its
It is characterised by: by a damping resistance after described fundamental voltage and pulse voltage superposition
To precipitator energisation.
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| CN201210554680.2A CN103028494B (en) | 2012-12-19 | 2012-12-19 | A kind of electrostatic precipitation pulse power source control system |
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| CN201210554680.2A CN103028494B (en) | 2012-12-19 | 2012-12-19 | A kind of electrostatic precipitation pulse power source control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103920594A (en) * | 2013-07-31 | 2014-07-16 | 金华大维电子科技有限公司 | High-voltage pulse power supply for electric precipitation |
| CN103944422A (en) * | 2014-04-08 | 2014-07-23 | 鞍山市太重工矿设备有限公司 | High-frequency power supply for electrostatic precipitator |
| CN104270030B (en) * | 2014-10-11 | 2017-07-07 | 孙卓 | A kind of pulse power that can be exported with short circuit |
| CN107262285B (en) * | 2017-08-10 | 2023-06-23 | 北京博谦工程技术有限公司 | Current control device for electrostatic dust collection power supply |
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