CN105080722B - Can jamproof electrostatic precipitation direct current pulse power source - Google Patents

Can jamproof electrostatic precipitation direct current pulse power source Download PDF

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CN105080722B
CN105080722B CN201510433959.9A CN201510433959A CN105080722B CN 105080722 B CN105080722 B CN 105080722B CN 201510433959 A CN201510433959 A CN 201510433959A CN 105080722 B CN105080722 B CN 105080722B
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China
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voltage
pulse
direct current
module
control
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CN201510433959.9A
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Chinese (zh)
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CN105080722A (en
Inventor
贺博
王燕
齐以年
赵青松
孟永鹏
龚晓宏
吴晓明
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西安交通大学
西安航天动力测控技术研究所
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Abstract

Can jamproof electrostatic precipitation direct current pulse power source the invention discloses one kind, including a three-phase alternating-current supply, connect a main circuit switch of the three-phase alternating-current supply, it is characterized in that, after three-phase alternating current is through main circuit switch, the magnitude of voltage no more than high direct voltage of 60kV is obtained after a direct current generation unit boosting and rectification all the way;Under the control of another Lu Yi signaling control unit, it is that 100~500Hz, pulsewidth are not more than the high-voltage pulse of 100 μ s, amplitude no more than 60kV through impulse generating unit output frequency, the high-voltage pulse is common with the high direct voltage of direct current generation unit output after synthesis, to be applied on electrostatic precipitator pole plate in a direct current and superimposed pulses unit.

Description

Can jamproof electrostatic precipitation direct current pulse power source
Technical field
The present invention relates to environmental protection equipment power supply, more particularly to a kind of electrostatic precipitation direct current pulse power source.
Background technology
Electrostatic precipitation is a kind of dedusting method commonly used in modern industry system, is also a kind of important of control atmosphere pollution Means.Electrostatic precipitator body is typically to be made up of two opposite polarity electrodes, and the larger lineation electrode of its mean curvature is electricity Dizzy pole or discharge electrode, the less plate electrode of curvature are referred to as dust collecting electrode.Electrostatic precipitator is by discharge electrode and dust collecting electrode Between set up a high voltage electric field, the gas for flowing through electric field is ionized, so make by the dust granules of electric field it is charged after Dust collecting electrode is shifted in the presence of electric field force and is piled up in dust collecting electrode, gather up dust finally by the mode of vibration dust-cleaning Come.
At present, the electrostatic precipitator that most enterprises are used is as power supply using HVDC.In this confession Under electrically, because dust layer equivalent capacity effect can cause back corona phenomenon, efficiency of dust collection is caused to decline, and for particle diameter Dust granules less than 0.1 μm, efficiency of dust collection is very low.With the continuous improvement of national requirements for environmental protection, to the waste gas discharge of enterprise It is required that also improving therewith, traditional electrostatic precipitator cannot gradually meet requirement, be badly in need of changing or transform.Compared to Direct current supply, during using pulse power supply mode, the equivalent capacity of precipitator dust layer can only be filled with seldom during pulse applies Electric charge, pulse disappear during charged lotus discharge substantially, so on dust layer will not because of stored charge formed high pressure and Dust is set to cause inverse corona;In addition, pulsed high voltage generator is charged pulse to the charged of dust, thus with good energy-conservation effect Really;Powered using high voltage pulse the arresting efficiency that can also improve to superfine particulate matter.Therefore powered with conventional dc source Deduster is compared, and the deduster dust removing effects that DC pulse superposition is powered are more preferable.
For above-mentioned situation, many enterprises such as the Ding Haotian environmental protection equipments Co., Ltd of Xiangyang nine, Zhejiang are linked to be environmentally friendly science and technology Co., Ltd and Jiahuan Electronic Co., Ltd., Zhejiang Prov. etc., propose in the way of HVDC superimposed pulse as electrostatic precipitation in succession The design that device is powered.So that dust arrester have can accomplish to overcome back corona phenomenon, without serious flashover, improve trickle The advantages of collection efficiency of dust, but some shortcomings are there is also simultaneously:1st, HVDC or height are not taken into full account in design Pressure pulse may produce impact in start-up course to whole system, and the direct current component before also not formed to high-voltage pulse is carried out Closed-loop control, the operation stability and antijamming capability of system is low.2nd, mostly it is by by three-phase electricity in the generation of high-voltage pulse Source elder generation rectification another mistake changes to high frequency and boosts, then rectification under high pressure, then produces pulse by the action of switching device and applies Add to pulse transformer and finally produce high-voltage pulse, such multiple conversions complex structure can not only increase the loss of electric energy, while Requirement of the condition of high voltage to switching device is very high, and corresponding design and maintenance cost can be very high.3rd, to the product of HVDC fundamental wave First portion control is excessive, increases the complexity of control system, while increased the difficulty to existing precipitator energisation Power supply alteration. Above-mentioned reason limits further genralrlization and the application of existing design thinking.
The content of the invention
It is an object of the invention to provide a kind of operation stability and antijamming capability be good, simple structure, design and safeguard into A kind of electrostatic precipitation direct current arteries and veins that this low, control system complexity is small, be conducive to existing precipitator energisation Power supply alteration Rush power supply.
To achieve the above objectives, the present invention is adopted the following technical scheme that and is achieved:
One kind can jamproof electrostatic precipitation direct current pulse power source, an including main circuit for connection three-phase alternating-current supply Switch, it is characterised in that after three-phase alternating current is through main circuit switch, obtains after a direct current generation unit boosting and rectification all the way It is not more than the high direct voltage of 60kV to magnitude of voltage;Under the control of another Lu Yi signaling control unit, through a pulses generation Unit output frequency is that 100~500Hz, pulsewidth are not more than the high-voltage pulse of 100 μ s, amplitude no more than 60kV, the high-voltage pulse It is common with the high direct voltage that direct current generation unit is exported after synthesis, to be applied to electrostatic and remove in a direct current and superimposed pulses unit On dirt device pole plate.
In such scheme, the impulse generating unit successively by three-phase bridge fully controlled rectifier module, DC-DC booster circuit, Pulse boosting module composition, wherein, under the control of signaling control unit, three-phase bridge fully controlled rectifier module by input voltage by 0V gradually rises up to 200~600V and stabilization is in the value, then through DC-DC booster circuit, output voltage gradually rises up to 500~ 1500V is simultaneously stable in the value, finally produces frequency to be not more than 100 μ s, width for 100~500Hz, pulsewidth in pulse boosting module High-voltage pulse of the value no more than 60kV, output to direct current and superimposed pulses unit.
The signaling control unit includes that signal controls to be powered with processing module, for the control system that the module provides electric energy Power module, the signal control and three tunnels of controlled output point of processing module, be respectively:Three-phase is connected by phase shift trigger Bridge-type full-controlled rectifier module;DC-DC booster circuit is connected by IGBT1 trigger boards;Pulse boosting is connected by IGBT2 trigger boards Module, signal control is believed with processing module by the voltage that first voltage sensor gathers the output of three-phase bridge fully controlled rectifier module Number;And the voltage signal that DC-DC booster circuit is exported is gathered by second voltage sensor.
The direct current generation unit is made up of Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier block coupled in series.
Compared with prior art, it is an advantage of the invention that:
1st, the prime rectification and DC-DC boostings part that circuit is produced to high-voltage pulse carry out soft start and closed-loop control, increase Add the stability and antijamming capability of system operation, effectively prevent the impact that high voltage startup moment causes to system.
2nd, three-phase alternating-current supply boosts to 1000V by directly carrying out DC-DC after bridge rectifier and filtering, then by opening Close the action generation pulse of device and be applied to pulse transformer and obtain high-voltage pulse, the circuit structure letter that high voltage pulse is produced Single, the requirement to switching device is low (operating voltage is low), and design and maintenance cost are low.
3rd, HVDC part directly obtains after being boosted by three-phase alternating-current supply through three-phase uncontrollable rectifier, and control system is main Concentrate on and circuit part is produced to high-voltage pulse, control system is relatively easy, to existing with HVDC as power supply Retrofit of Electrostatic Precipitator is convenient.
Brief description of the drawings
Fig. 1 is the overall structure block diagram of electrostatic precipitation direct current pulse power source of the present invention.
Fig. 2 is a specific embodiment of Fig. 1.Wherein, A is the absorption circuit of 6. middle IGBT;B is the absorption of 7. middle IGBT Loop.
Fig. 3 is the soft start and closed loop controlling structure block diagram of the three-phase bridge fully controlled rectifier unit in Fig. 1, Fig. 2.
Fig. 4 is the soft start and closed loop controlling structure block diagram of the DC-DC booster circuit unit in Fig. 1, Fig. 2.
Specific embodiment
As shown in figure 1, one kind can jamproof electrostatic precipitation direct current pulse power source, including one connection three-phase alternating current A source main circuit switch 1. 2., connection main circuit switch a direct current generation unit 3. with an impulse generating unit 8., 9. impulse generating unit is connected with a signaling control unit, and the output of direct current generation unit and impulse generating unit passes through 4. 10. one direct current be connected to pole plate of dust remover with superimposed pulses unit.Wherein, direct current generation unit is boosted by Industrial Frequency Transformer Module and three-phase bridge uncontrollable rectifier block coupled in series are constituted;Impulse generating unit successively by three-phase bridge fully controlled rectifier module 5., DC-DC booster circuit is 6., 7. pulse boosting module constituted.After three-phase alternating-current supply is through main circuit switch, produced through direct current all the way The HVDC that magnitude of voltage is 40kV is obtained after unit boosting and rectification;Another road in the presence of signaling control unit, through three Phase bridge-type full-controlled rectifier module, output voltage is gradually risen up to and is stablized in 500V by 0V, then through DC-DC booster circuit, output Voltage is gradually increasing by 500V and is stablized in 1000V, and generation amplitude is under pulse boosting module breaker in middle device activity 1000V, frequency 250Hz, the pulse of the μ s of pulsewidth 10, the high-voltage pulse that amplitude is 40kV is obtained through pulse transformer boost;Finally The high-voltage pulse that the high direct voltage that 10. direct current exports direct current generation unit with superimposed pulses unit is exported with impulse generating unit Superposition is after-applied on electrostatic precipitator pole plate.
As shown in Fig. 2 direct current generation unit is 3. (high by Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier module Pressure silicon stack rectifier bridge) composition, three-phase alternating-current supply is after Industrial Frequency Transformer boosting and high voltage silicon rectifier stack rectification again through capacitance-resistance filter The HVDC of 40kV is obtained, the HVDC is superimposed after-applied to deduster through direct current and superimposed pulses unit with high-voltage pulse Pole plate, by direct current and superimposed pulses circuit, impact is produced when HVDC can be avoided to start to system.In the present embodiment, directly The high direct voltage of stream generation unit output is 40kV, it is also possible to increases three phase ac controller by front end, makes output direct current Magnitude of voltage is adjustable between 0V to 40kV.
9. signaling control unit includes signal control and processing module, electricity of being powered for the control system that the module provides electric energy Source module, wherein, control system power supply module is that a wattage transformer and multiple switch power supply are constituted, signal control with Processing module can be DSP, can be analog circuit board, or both combinations.Signal controls the control with processing module Three tunnels of system output point, be respectively:By phase shift trigger connect three-phase bridge fully controlled rectifier module 5., by IGBT1 trigger boards 7. 6., by IGBT2 trigger boards connection DC-DC booster circuit connect pulse boosting module.Signal controls logical with processing module Cross the voltage signal of first voltage sensor collection three-phase bridge fully controlled rectifier module output;And adopted by second voltage sensor The voltage signal of collection DC-DC booster circuit output.
5. three-phase bridge fully controlled rectifier module is made up of three-phase isolation transformer with controllable silicon rectifying bridge, by signal control Unit sets the module soft start and carries out closed-loop control to the module, and its control principle is as shown in Figure 3:Three phase bridge all control is whole When flow module starts, signal control provides soft-start signal all the way with processing module, while to three-phase bridge fully controlled rectifier module Carry out PI regulations after output signal (through first voltage sensor) is conditioned, the output valve of PI taken after comparing with soft-start signal compared with It is small to be worth as the control signal of phase shift trigger.Rectification output very little during due to starting, output valve is very big after PI regulations, more than soft The control voltage of phase shift trigger is provided by soft-start signal in a period of time after enabling signal, thus startup, so as to realize three The soft start of phase bridge-type full-controlled rectifier module.And when the module output voltage gradually rises up to certain value, PI output valves reduce, As long as the final value for setting soft-start signal is more than expected PI output valves, then when PI output valves are less than soft-start signal, PI is defeated Go out for phase shift trigger provides control voltage Vc, control voltage VcBy obtaining Trigger Angle α after phase shift trigger, Trigger Angle applies New rectifier output voltage is obtained in rectifier bridge, so as to realize the closed-loop control of three-phase bridge fully controlled rectifier module.Three-phase bridge After full-controlled rectifier module starts, output voltage is gradually risen up to and is stablized in 500V by 0V.Three-phase bridge fully controlled rectifier module is defeated Go out voltage relevant with control parameter, it is contemplated that be actually needed, by changing control parameter Vref(comparison voltage), can be by rectification Arbitrary value of the output voltage stabilization between 200V to 600V.
The typical Boost circuit that 6. DC-DC booster circuit is made up of inductance, switching device IGBT1 and diode, It does boosting inverter to previous stage three-phase bridge fully controlled rectifier module output voltage, while for rear stage pulse boosting module is provided Basic voltage, controls to set DC-DC booster circuit soft start with processing module and carry out closed-loop control to the circuit by signal, Its control principle is as shown in Figure 4:
DC-DC booster circuit does further boosting treatment, three-phase to the output voltage of three-phase bridge fully controlled rectifier module After bridge-type full-controlled rectifier module stability, start DC-DC booster circuit, signal control is same with processing module to provide soft start all the way Signal, while to carrying out PI regulations, the output of PI after voltage (through the second voltage sensor) conditioning of DC-DC booster circuit output Value compares the control signal for taking smaller value afterwards as PWM modulator with soft-start signal, PWM modulator output duty ratio corresponding PWM ripples.DC-DC booster circuit soft start and loop control theory are similar to three-phase fully-controlled rectifying part, that is, when starting after boosting Output very little, the output valve of adjusted rear PI is very big, more than PWM modulator in a period of time after soft-start signal, thus startup Control voltage by soft-start signal provide, so as to realize the soft start of booster circuit, and work as booster circuit output voltage gradually When rising to certain value, PI output valves reduce, as long as the final value of setting soft-start signal is more than expected PI output valves, then work as PI When output valve is less than soft-start signal, PI is output as PWM modulator and provides control voltage, so as to realize the closed loop control of booster circuit System.After DC-DC booster circuit starts, output voltage is gradually risen up to and is stablized in 1000V by 500V.
DC-DC booster circuit output voltage is relevant with control parameter and three-phase bridge fully controlled rectifier module output voltage, examines Consider and be actually needed, by changing control parameter and three-phase bridge fully controlled rectifier module output voltage values, DC-DC can be risen piezoelectricity Road output voltage stabilization is between 200V to 1500.
7. pulse boosting module is made up of switching device IGBT2 and pulse transformer.Carried in previous stage DC-DC booster circuit On the basis of the 1000V DC voltages of confession, by signal control with processing module export certain control signal (frequency be 250Hz, Pulsewidth is the PWM ripples of 10 μ s), the break-make of controlling switch device is the low pressure of 1000V so as to produce respective frequencies and pulsewidth, amplitude Pulse, it is 40kV that the pulse puts on and obtains respective frequencies and pulsewidth, amplitude after pulse transformer boost on pulse transformer High-voltage pulse.The pulse frequency and pulsewidth that the pulse boosting module is produced are adjustable, and pulse frequency 100Hz~500Hz is adjustable, Limited by pulse transformer working frequency, frequency optimum traffic 300Hz, pulsewidth is adjustable between 1 μ s~100 μ s as needed, Best effort pulsewidth is 10 μ s, and pulse amplitude is influenceed by DC-DC booster circuit output voltage, and adjustable extent is 8kV~60kV.

Claims (3)

1. one kind can jamproof electrostatic precipitation direct current pulse power source, including the main circuit of a connection three-phase alternating-current supply opens Close, it is characterised in that after three-phase alternating current is through main circuit switch, obtained after a direct current generation unit boosting and rectification all the way Magnitude of voltage is not more than the high direct voltage of 60kV;Under the control of another Lu Yi signaling control unit, through a pulses generation list First output frequency is that 100~500Hz, pulsewidth are not more than the high-voltage pulse of 100 μ s, amplitude no more than 60kV, the high-voltage pulse with The high direct voltage of direct current generation unit output is common after synthesis, to be applied to electrostatic precipitation in a direct current and superimposed pulses unit On device pole plate;The impulse generating unit is successively by three-phase bridge fully controlled rectifier module, DC-DC booster circuit, pulse boosting mould Block is constituted, wherein, under the control of signaling control unit, by 0V be gradually increasing input voltage by three-phase bridge fully controlled rectifier module To 200~600V and stably in the value, then through DC-DC booster circuit, output voltage gradually rises up to 500~1500V and stabilization In the value, finally frequency is produced to be not more than 100 μ s, amplitude and be no more than for 100~500Hz, pulsewidth in pulse boosting module The high-voltage pulse of 60kV, output to direct current and superimposed pulses unit;Pulse frequency and pulsewidth that pulse boosting module is produced Adjust, pulse frequency 100Hz~500Hz is adjustable, pulsewidth is adjustable between 1 μ s~100 μ s.
2. as claimed in claim 1 can jamproof electrostatic precipitation direct current pulse power source, it is characterised in that the signal control Unit processed includes signal control and processing module, the control system power supply module of electric energy, the signal is provided for the module Control and three tunnels of controlled output point of processing module, be respectively:Three-phase bridge fully controlled rectifier module is connected by phase shift trigger; DC-DC booster circuit is connected by IGBT1 trigger boards;Pulse boosting module, signal control and place are connected by IGBT2 trigger boards Reason module gathers the voltage signal that three-phase bridge fully controlled rectifier module is exported by first voltage sensor;And by second voltage The voltage signal of sensor collection DC-DC booster circuit output.
3. as claimed in claim 1 can jamproof electrostatic precipitation direct current pulse power source, it is characterised in that the direct current is produced Raw unit is made up of Industrial Frequency Transformer boost module and three-phase bridge uncontrollable rectifier block coupled in series.
CN201510433959.9A 2015-07-22 2015-07-22 Can jamproof electrostatic precipitation direct current pulse power source CN105080722B (en)

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CN105709935A (en) * 2016-04-25 2016-06-29 厦门绿洋电气有限公司 Pulsed power supply for electrostatic dust collection and generation method of pulsed power supply
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CN106900135A (en) * 2017-04-10 2017-06-27 中国科学院电工研究所 A kind of nanosecond pulse for plasma igniting is superimposed continuous-current plant
CN107309087A (en) * 2017-08-10 2017-11-03 环球国合(北京)低碳环保科技有限公司 A kind of electromagnetism ash-cleaning type electric precipitation
CN107398351A (en) * 2017-08-10 2017-11-28 许玉蕊 High-performance air purifier
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