CN102097956A - High-frequency high-voltage high-power power supply for electrostatic dust removal - Google Patents
High-frequency high-voltage high-power power supply for electrostatic dust removal Download PDFInfo
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- CN102097956A CN102097956A CN2011100456519A CN201110045651A CN102097956A CN 102097956 A CN102097956 A CN 102097956A CN 2011100456519 A CN2011100456519 A CN 2011100456519A CN 201110045651 A CN201110045651 A CN 201110045651A CN 102097956 A CN102097956 A CN 102097956A
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Abstract
The invention discloses a high-frequency high-voltage high-power power supply for electrostatic dust removal, which mainly comprises a three-phase power-frequency power supply, a rectification part, an inverter part, a resonant circuit, a high-frequency transformer, a high-voltage rectifier bridge, a load and a control module. The rectification part consists of a thyristor rectification module capable of rectifying the power-frequency electric energy output by the three-phase power supply into direct current, and a filter capacitor; the back of the rectification part is connected with the inverter part consisting of a high-frequency full-bridge Insulated Gate Bipolar Transistor (IGBT) inverter capable of inverting the direct current into high-frequency square wave; the resonant circuit consisting of a series inductor Lr, a series capacitor Cr and a parallel capacitor Cp and supplying power to the post-stage circuit in a resonant manner is connected behind the inverter part. By the invention, the deficiency of the conventional electrostatic dust removing power supply can be compensated, the dust removing effect is improved, and the utilization ratio of electric energy can be increased.
Description
Technical field
What the present invention relates to is a kind of high-frequency and high-voltage large power supply of the electrostatic dust collection equipment power supply for each class factory.
Background technology
The high speed development of modern industry has brought huge pressure to environment, and environmental protection problem becomes increasingly conspicuous, and becomes the focus that people pay close attention to.Containing a large amount of dust in the industrial processes in the exhaust gas discharged, have a strong impact on air quality, is to cause the air-polluting major reason.Therefore, legal provisions, modern industry enterprise waste gas all must could discharge after being up to state standards through dust removal step.At present, the electrostatic precipitation mode is generally adopted in dedusting, and electrostatic precipitator has become indispensable dedusting means in the industry such as coal processing, mining site, thermal power plant, metallurgy, oil, chemical industry.
Because the rolling up of industrial enterprise, environmental problem progressively worsens, and air quality more and more allows people's worry, and people are strong day by day for the yearning in blue mountains and green waters, blue sky blue sky.Therefore, the environmental protection dynamics of country progressively strengthens, and in order to reduce maximum soot emissions source---the discharging of industrial fumes, all types of industries discharging standards is than strict more in the past.Thermal power plant always is the rich and influential family of soot emissions, but stipulates that from " the atmosphere pollutants emission standards GB13223-2003 of thermal power plant " of enforcement on January 1 in 2004 the highest permission concentration of emission of the flue dust of newly-built thermal power plant is from 200mg/m
3Reduce to 50mg/m
3, this has embodied the strong desire of people to the protection air quality, has also reflected state guarantee environment, the resolution that purifies air.
The electrostatic precipitation effect depends on the power supply and the control ability of static dust-removing power to a great extent.Traditional high-voltage DC power supply adopts the power supply of Thyristor Controlled voltage regulating rectifier more, this mode makes three-phase main-frequency through thyristor voltage regulation earlier, three phase rectifier again after boosting to transformer, the advantage of this mode be simple in structure, capacity is big, control technology is ripe, but that shortcoming is a conversion efficiency is low, volume is big, weight is big, cost is high, dynamic responding speed is slow, output ripple is big.Dust removing effects is difficult to reach fully the emission limit set of new standard separately, in order to adapt to new discharge standard, must upgrade electrostatic dust collection equipment, and many factories are improved in conjunction with bag-type dust, this practice cost height, and can cause secondary pollution.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, and provide a kind of improved, can substitute the power frequency supply that generally uses at present, not only can obviously improve the dust removing effects of deduster, also cost-saved, reduce energy consumption, have the electrostatic precipitation high-frequency and high-voltage large power supply of remarkable economical advantage.
The objective of the invention is to finish by following technical solution, it is mainly by three phase worker power, rectifying part, the inversion part, resonant circuit, high frequency transformer, the high-pressure side rectifying part, load and control module are formed, and described rectifying part is by thyristor rectifier module and the filter capacitor that the power frequency electric energy of three phase mains output be rectified into direct current being constituted, be connected with after this rectifying part the inversion part that is made of high frequency full-bridge IGBT inverter that dc inversion can be become high frequency square wave; Being connected to the resonance manner after this inversion part is the resonant circuit of being made up of series inductance Lr, series capacitance Cr and shunt capacitance Cp that late-class circuit is powered.
Series inductance Lr of the present invention is the leakage inductance of high frequency transformer, and shunt capacitance Cp is the parasitic capacitance of high frequency transformer; Being connected to after the described resonant circuit to provide one near the high frequency transformer of pure direct voltage and the high-pressure side rectifying part of being made up of the high-voltage rectifying bridge for load.
Invent described high-frequency high-voltage circuit topology and have multiple beneficial effect: at first, for the power frequency supply that has only thyristor voltage regulation that present actual deduster generally uses, the novel high-frequency electric power output voltage approaches pure direct current, fluctuation range is very little, improved dust removing effects, saved electric energy greatly, the volume ratio Industrial Frequency Transformer of high frequency transformer reduces manyly in addition, provides cost savings; The second, the control characteristic and the speed of novel high-frequency power supply have obtained large increase, and the deduster load of frequent discharge changeable for operating mode, not only turn-off and toggle speed faster, and the regulating power of stable state is more superior; The 3rd, resonant circuit (groove) makes full use of the leakage inductance and the parasitic capacitance of transformer itself, has reduced adding element, has simplified circuit, has improved the stability of circuit; The 4th, front end thyristor rectifier module can cooperate pressure regulation, ring high frequency pressure regulation in forming, and the regulative mode of outer shroud power frequency pressure regulation combines the big and fast two-fold advantage of governing speed of adjustable range.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Label shown in the figure is: three phase worker power 1, thyristor rectifier module and filter capacitor 2, high frequency full-bridge IGBT inverter 3, high frequency transformer 4, high-voltage rectifying bridge 5, electrostatic precipitator equivalent electric circuit 6, high voltage side current voltage sampling resistor 7, control module 8, resonance current transducer 9.
Embodiment
The present invention will be described in detail below in conjunction with accompanying drawing: shown in Figure 1, the present invention is mainly by three phase worker power 1, rectifying part 2, inversion part 3, resonant circuit, high frequency transformer 4, high-pressure side rectifying part 5, load and control module 8 are formed, described rectifying part is by thyristor rectifier module and the filter capacitor 2 that the power frequency electric energy of three phase mains output be rectified into direct current being constituted, be connected with after this rectifying part the inversion part that is made of high frequency full-bridge IGBT inverter 3 that dc inversion can be become high frequency square wave; Being connected to the resonance manner after this inversion part is the resonant circuit of being made up of series inductance Lr, series capacitance Cr and shunt capacitance Cp that late-class circuit is powered.
Series inductance Lr of the present invention is the leakage inductance of high frequency transformer, and shunt capacitance Cp is the parasitic capacitance of high frequency transformer; Being connected to after the described resonant circuit to provide one near the high frequency transformer 4 of pure direct voltage and the high-pressure side rectifying part of being made up of high-voltage rectifying bridge 5 for load; Load described here is an electrostatic precipitator equivalent electric circuit 6.
The present invention adopts terse circuit topology, makes full use of the parameter of transformer itself, realizes the high frequencyization of electric energy; After its process processing, export stable high direct voltage to the rectification-inversion-resonance step-up-rectification of electric energy; Particularly, power supply comprises three-phase thyristor rectification module, dc filter capacitor, high-power full-bridge IGBT inverter and control Driver Circuit thereof, connection in series-parallel (LCC) resonant transformation groove, high-power high-frequency transformer, high-frequency and high-voltage rectifier bridge and load.
The three-phase thyristor module that is used for three phase rectifier can be chosen on market, also can buy thyristor, control chip and driver module and manufacture and design; Dc filter capacitor will select enough greatly, can buy in the electronic market; After IGBT inversion full-bridge then needs to buy IGBT module, radiator, drive circuit and control chip earlier, build after according to the development and Design method of IGBT voluntarily through the programming development of hardware installation, circuit design, control chip and debugging; Resonant slots is made up of two serial inductor capacitances and a shunt capacitance after the inversion, wherein series capacitance is that the high frequency large-current electric that adds holds, and series inductance is the leakage inductance of high frequency transformer, and shunt capacitance then is the parasitic parameter of high frequency transformer itself, and the latter two needn't add in addition; High-power high-frequency transformer is a fabrication of iron core with ferrite or non-crystalline material, about step-up ratio 1:150; Full-bridge rectification bridge after the transformer output is made up of high-frequency high-voltage diode; Output to the load deduster at last, deduster is equivalent to an electric capacity with variable-resistance in parallel; The feedback signal of control is got the voltage and current two paths of signals of output.
The present invention with the essential feature that similar high-frequency and high-voltage power supply has is: be input to last output from three-phase and comprise rectification-inversion-three basic links of rectification; On high-tension side electric current and voltage are picked up from the sampling of control signal; The protection of Circuits System comprises the overcurrent that prevents heavy current circuit.
The technical characterictic that the present invention is different with immediate prior art is: intelligent thyristor module is adopted in rectification, can control the direct current input and can cooperate pressure regulation; Frequency and the dual control in dead band are adopted in inverter control, become main control mode; Inverter output back resonant circuit has only three elements, the inductance capacitance of two series connection and a shunt capacitance.In fact series inductance and shunt capacitance are the parasitic parameters of high frequency transformer, so both saved the element input, make full use of the parameter of equipment itself, also simplified circuit greatly, the size of each component value is determined through Theoretical Calculation and actual tests, the parasitic parameter of transformer then by winding and transformer device structure acquisition rationally is set so that reach the preferable resonance under the regulation high frequency.
High frequency electric source of the present invention comprises following major part: three phase worker power 1, rectifying part 2, inversion part 3, resonant circuit, high frequency transformer 4, high-pressure side rectifying part 5, load 6 and control module 8. that Lr, Cr and Cp form
Thyristor rectifier module and filter capacitor 2 are rectified into direct current to the power frequency electric energy of three phase mains 1 output, by high frequency full-bridge IGBT inverter 3 dc inversion is become high frequency square wave then, this square-wave voltage is by series capacitance Cr, resonance in the resonant slots that series inductance Lr and shunt capacitance Cp form, with the resonance manner is the late-class circuit power supply, wherein series inductance Lr is the leakage inductance of high frequency transformer, shunt capacitance Cp is the parasitic capacitance of high frequency transformer, among the figure 4 is exactly high-power high-frequency transformer, after transformer boosts the high frequency voltage at parallel resonance capacitor C p two ends, by being load 6 power supplies after 5 rectifications of high-frequency and high-voltage rectifier bridge, can provide the voltage of an approaching pure direct current.Because the state of electrostatic precipitator load 6 changes at any time, be that its equivalent resistance is constantly changing, in order to stablize is precipitator energisation safely, by sampling resistor 7 pairs of secondary sides electric current and voltage sample, 8 pairs of signals of control module carry out analyzing and processing, take corresponding control strategies, change the drive signal of thyristor and IGBT, the rectification link and the inversion link of control front end play regulating action fast to voltage in real time.In addition, because a variety of causes, the electric current possibility overcurrent of resonant circuit injures the safe operation of IGBT and whole power supply, thus it is monitored by current sensor 9, and when overcurrent, take safeguard measure automatically by control module.Whole power supply is the electrostatic precipitator power supply like this under the prerequisite of guaranteeing stable and safety.
Claims (2)
1. electrostatic precipitation high-frequency and high-voltage large power supply, it is mainly by three phase worker power, rectifying part, the inversion part, resonant circuit, high frequency transformer, high-voltage rectifying bridge, load and control module are formed, and its architectural feature is: above-mentioned rectifying part is made of the thyristor rectifier module and the filter capacitor that can be rectified into the power frequency electric energy that three phase mains is exported direct current; Be connected with the inversion part that constitutes by high frequency full-bridge IGBT inverter that dc inversion can be become high frequency square wave after this rectifying part; Being connected to the resonance manner after this inversion part is the resonant circuit of being made up of series inductance Lr, series capacitance Cr and shunt capacitance Cp that late-class circuit is powered.
2. electrostatic precipitation high-frequency and high-voltage large power supply according to claim 1 is characterized in that described series inductance Lr is the leakage inductance of high frequency transformer, and shunt capacitance Cp is the parasitic capacitance of high frequency transformer; Being connected to after the described resonant circuit to provide one near the high frequency transformer of pure direct voltage and the high-pressure side rectifying part of being made up of the high-voltage rectifying bridge for load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100456519A CN102097956A (en) | 2011-02-25 | 2011-02-25 | High-frequency high-voltage high-power power supply for electrostatic dust removal |
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| CN2011100456519A CN102097956A (en) | 2011-02-25 | 2011-02-25 | High-frequency high-voltage high-power power supply for electrostatic dust removal |
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| CN102097956A true CN102097956A (en) | 2011-06-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368420A (en) * | 2012-04-10 | 2013-10-23 | 中国科学院电子学研究所 | Test power source for large-power microwave device |
| CN106492990A (en) * | 2016-10-14 | 2017-03-15 | 江苏绿洁节能有限公司 | A kind of high-frequency high-voltage dust removing power supply |
| CN107096644A (en) * | 2017-05-12 | 2017-08-29 | 华南理工大学 | The high-frequency and high-voltage power supply and its control method of a kind of electrostatic precipitation |
| CN111420806A (en) * | 2019-08-06 | 2020-07-17 | 王波 | Quick protection system of electrostatic precipitator |
| CN115021591A (en) * | 2022-08-08 | 2022-09-06 | 深圳市恒运昌真空技术有限公司 | LCC topological circuit for converting three phases into DC-DC |
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| US6373723B1 (en) * | 1998-06-18 | 2002-04-16 | Kraftelektronik Ab | Method and device for generating voltage peaks in an electrostatic precipitator |
| CN101093963A (en) * | 2006-06-23 | 2007-12-26 | 阿尔斯通技术有限公司 | Power supply for electrostatic precipitator |
| CN201625584U (en) * | 2009-10-15 | 2010-11-10 | 厦门市天源兴环保科技有限公司 | Amplitude modulation high-frequency high-voltage power supply circuit for electrostatic precipitator |
| CN101954313A (en) * | 2010-09-08 | 2011-01-26 | 上海理工大学 | High-frequency high-voltage switching power supply for electric precipitation |
| CN202150807U (en) * | 2011-02-25 | 2012-02-22 | 浙江省电力设计院 | High-frequency high-voltage high-power power supply for electrostatic precipitation |
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2011
- 2011-02-25 CN CN2011100456519A patent/CN102097956A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6373723B1 (en) * | 1998-06-18 | 2002-04-16 | Kraftelektronik Ab | Method and device for generating voltage peaks in an electrostatic precipitator |
| CN101093963A (en) * | 2006-06-23 | 2007-12-26 | 阿尔斯通技术有限公司 | Power supply for electrostatic precipitator |
| CN201625584U (en) * | 2009-10-15 | 2010-11-10 | 厦门市天源兴环保科技有限公司 | Amplitude modulation high-frequency high-voltage power supply circuit for electrostatic precipitator |
| CN101954313A (en) * | 2010-09-08 | 2011-01-26 | 上海理工大学 | High-frequency high-voltage switching power supply for electric precipitation |
| CN202150807U (en) * | 2011-02-25 | 2012-02-22 | 浙江省电力设计院 | High-frequency high-voltage high-power power supply for electrostatic precipitation |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368420A (en) * | 2012-04-10 | 2013-10-23 | 中国科学院电子学研究所 | Test power source for large-power microwave device |
| CN106492990A (en) * | 2016-10-14 | 2017-03-15 | 江苏绿洁节能有限公司 | A kind of high-frequency high-voltage dust removing power supply |
| CN107096644A (en) * | 2017-05-12 | 2017-08-29 | 华南理工大学 | The high-frequency and high-voltage power supply and its control method of a kind of electrostatic precipitation |
| CN111420806A (en) * | 2019-08-06 | 2020-07-17 | 王波 | Quick protection system of electrostatic precipitator |
| CN111420807A (en) * | 2019-08-06 | 2020-07-17 | 王波 | Control method of rapid protection system of electrostatic dust collector |
| CN111420806B (en) * | 2019-08-06 | 2022-08-26 | 苏州艾特隆精密科技有限公司 | Quick protection system of electrostatic precipitator |
| CN115021591A (en) * | 2022-08-08 | 2022-09-06 | 深圳市恒运昌真空技术有限公司 | LCC topological circuit for converting three phases into DC-DC |
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Application publication date: 20110615 |