CN104253560A - Direct current pulse power supply device for electric dust precipitation - Google Patents
Direct current pulse power supply device for electric dust precipitation Download PDFInfo
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- CN104253560A CN104253560A CN201410565284.9A CN201410565284A CN104253560A CN 104253560 A CN104253560 A CN 104253560A CN 201410565284 A CN201410565284 A CN 201410565284A CN 104253560 A CN104253560 A CN 104253560A
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Abstract
The invention relates to a novel direct current pulse power supply device for electrostatic dust precipitation. The device comprises a three-phase alternating current power supply, a direct current generating circuit, a pulse generating circuit, a bias magnetic circuit and a control circuit, wherein the direct current generating circuit is formed by the series connection of a three-phase rectifier and filter circuit, a full-bridge inversion circuit, a resonance network, a high-frequency transformer and a high-pressure rectifier circuit; the pulse generating circuit is formed by the series connection of an alternating current voltage regulating circuit, an industrial frequency transformer, a three-phase rectifier and filter circuit, a resonance network and a high-frequency pulse transformer. The direct current power supply part of the pulse generating circuit adopts an alternating current voltage regulating and series rectifying mode, the voltage stress of the rectifier circuits is reduced, and the design of a rectifier bridge and the rectifier and filter circuits and the stable running of the circuit are facilitated.
Description
technical field:
The present invention relates to field of power conversion, be specifically related to a kind of novel electric precipitation DC pulse electric supply installation.
background technology:
Along with China's industrialization, Development of China's Urbanization are accelerated and the lasting upgrading of consumption structure, energy demand be rigidity growth, and the environmental pollution brought thus is increasingly serious.Therefore, country, in " 12 " period, continues to carry forward vigorously " energy-saving and emission-reduction " work, makes every effort to the Economic Development Mode of soil boy structure close friend and resource-conserving.
Air Pollution prevention and control is an important process of China's energy-saving and emission-reduction, and from the beginning of this year, China's Middle Eastern continuous several times suffers large-scale haze weather, and its basic reason is that Air Pollutants Emissions is large.China is energy consumption big country, and within following significant period of time, be that the general layout of main energy sources is difficult to change with coal, coal consumption amount is by sustainable growth.Coal burning produces a large amount of dust, carbon dioxide and nitrogen oxide, is one of main source of Air Pollutant Emission.For reducing the harm of dust pollution, adopting cleaner to carry out collecting process is the method that industrial circle is conventional.Electric cleaner has the features such as process gas flow is large, dust-collecting efficiency is high, operating cost is low, be internationally recognized high-effective dust-removing equipment, the purifying coal-fired flue gas and the industrial dust pollution that have been widely used in the industrial departments such as thermal power generation, building material cement, iron and steel at present control.
Static dust-removing power is as the core apparatus of electric dust removal system, and it produces the high pressure needed for dedusting, and have vital impact to ash removal efficiency, its performance index determine the technical merit of electric dust removal system.Static dust-removing power is broadly divided into three classes: power frequency phase control rectifier power supply, high frequency inverter and the pulse power.Wherein, the general principle of the pulse power is on the high direct voltage basis that direct current high-voltage power supply provides, the pulse voltage of superposition Microsecond grade pulsewidth.Pulse power supply has the following advantages: 1. the pulse voltage duration is short, not easily triggers flashover, decreases energy loss, and energy-saving effect is remarkable; 2. pulse voltage can improve peak electric field strength, strengthens dust charge electricity, improves ash removal efficiency; 3. pulse power supply is especially favourable to the collection of high resistivity dust, can suppress the generation of inverse corona, reduces dust emission.
summary of the invention:
The object of the present invention is to provide a kind of novel electrostatic precipitation DC pulse electric supply installation.
Concrete technical scheme of the present invention is as follows:
A kind of electrostatic dust-removing DC pulse electric supply installation, comprises three-phase alternating-current supply, DC generating circuit, pulse generating circuit, biasing circuit and control circuit,
Described DC generating circuit is followed in series to form by three phase rectifier filter circuit, full bridge inverter, resonant network, high frequency transformer and high-voltage rectifier;
Described pulse generating circuit is followed in series to form by AC voltage adjusting circuit, Industrial Frequency Transformer, three phase rectifier filter circuit, resonant network and high-frequency pulse transformer.
Described pulse generating circuit medium-high frequency pulse transformer includes D.C. magnetic biasing circuit, and D.C. magnetic biasing circuit comprises DC power supply, current-limiting resistance and high frequency choke coil.
The resonant network of described pulse generating circuit have employed the mode of two resonant circuit series connection, and high-frequency pulse transformer adopts three tap modes, and centre tap ground connection.
Described three-phase alternating-current supply powers to respectively after three-phase electromagnetic interface filter DC generating circuit and pulse generating circuit.
Described DC generating circuit accesses deduster load after exporting series connection high-frequency and high-voltage choke.
Described control circuit comprises accessory power supply, DSP+FPGA double-core control system, digital/analog signal sampling modulate circuit, temperature sensing circuit, driving/protective circuit and communicating circuit.
Described pulse generating circuit DC bus adopts AC voltage adjusting, power frequency transformation, three phase rectifier filtering series connection obtains, Industrial Frequency Transformer is two road isolation and amplifier, connect respectively and obtain high direct voltage supply rear class resonant network, wherein series connection point ground connection in every road after three phase rectifier filtering.
the present invention compared to existing technology tool has the following advantages:
1, pulse generating circuit direct current supply part of the present invention have employed the mode of AC voltage adjusting and series rectifier, reduces the voltage stress of rectification circuit, is conducive to the design of rectifier bridge and current rectifying and wave filtering circuit and the stable operation of circuit.
2, pulse generating circuit resonant network of the present invention have employed the mode of 2 resonant circuit series connection, transformer adopts 3 tap modes, and centre tap ground connection, while reduction IGBT voltage stress, can effectively reduce the leakage inductance of transformer, thus output voltage pulse duration can be effectively reduced.When not reducing crest value of impulse voltage, the Voltage Pulse Width be applied in deduster load is narrower, deduster with flashover is less likely to occur, thus can peak electric field strength be improved, strengthen dust charge electricity, improve ash removal efficiency.
3, the present invention exports at DC generating circuit and adds high-frequency and high-voltage choke, can the effectively impact that causes DC generating circuit of pulse voltage that exports of suppressor pulse circuit for generating, the reliability of raising equipment.
4, control circuit of the present invention have employed DSP+FPGA double-core control system; utilize the advantage of FPGA on real-time, Synchronous data dispose and the advantage of DSP in complicated algorithm process simultaneously; both high speed acquisition/the conversion of signal had been realized by FPGA; realize real-time control and the protection of electric supply installation, realize again control and the flashover control of the multiple power supply mould of DC pulse electric supply installation by DSP.
accompanying drawing illustrates:
Fig. 1 is the general structure block diagram of DC pulse electric supply installation of the present invention;
Fig. 2 is the schematic diagram of pulse generating circuit;
Fig. 3 is the schematic diagram of DC generating circuit;
In figure: 1-AC voltage adjusting circuit, 2-three-phase double-path isolating output transformer, 3, 4 are three-phase commutation bridge, 5, 6, 7, 8 are current rectifying and wave filtering circuit, 9-IGBT, 10-three-phase alternating current inputs, 11, 12 are IGBT absorbing circuit, 13, 14 are spark absorbing circuit, 15, 16, 22, 25, 32 are current detection circuit, 17, 18 are resonant network, 19-high-frequency pulse transformer, 20, 21, 23 are biasing circuit, 24-block isolating circuit, the load of 26-deduster, 27-three-phase commutation bridge, 28-current rectifying and wave filtering circuit, 29, 30 are full bridge inverter, 31-resonant network, 33-high frequency transformer, 34-high-voltage rectifier, 35-high-frequency and high-voltage choke.
embodiment:
Below in conjunction with accompanying drawing, technical solution of the present invention is described below.
As shown in Figure 1, electrostatic dust-removing DC pulse electric supply installation of the present invention comprises three-phase alternating-current supply, DC generating circuit, pulse generating circuit, biasing circuit and control circuit.Control circuit comprises accessory power supply, DSP+FPGA double-core control system (adopting the high speed data sampling and processing system based on DSP and FPGA of No. 201220334118.4 patents), digital/analog signal sampling modulate circuit, temperature sensing circuit, driving/protective circuit and communicating circuit.
DC generating circuit and pulse generating circuit share a three-phase alternating-current supply, and three-phase alternating-current supply supplies DC generating circuit and pulse generating circuit respectively after three-phase electromagnetic interface filter.
As shown in Figure 2, pulse generating circuit is followed in series to form by AC voltage adjusting circuit, Industrial Frequency Transformer (2), three phase full bridge current rectifying and wave filtering circuit, resonant network and high-frequency pulse transformer (19).High-frequency pulse transformer adopts three tap modes, and centre tap ground connection, high-frequency pulse transformer comprises D.C. magnetic biasing circuit to eliminate the unidirectional magnetiztion of pulse transformer core, and D.C. magnetic biasing circuit comprises DC power supply (23), current-limiting resistance (22) and high frequency choke coil (20).The resonant network of pulse generating circuit adopts the mode of two resonant circuit series connection.The auxiliary circuit of pulse generating circuit comprises IGBT absorbing circuit, spark absorbing circuit, IGBT current detection circuit, output current detection circuit (25).
Because pulse transformer is operated in single-phase magnetized state, in order to place core sataration, magnetic reset circuit must be increased, biasing circuit comprises DC power supply (23), current-limiting resistance (21), power frequency choke (20) and current sampling mutual inductor (22), biasing circuit is given around the magnetic bias coil power supply on pulse transformer, is adjusted the volt-seconds value of magnetic reset by adjustment magnetic bias coil turn, DC power supply output and current-limiting resistance.
Three-phase alternating-current supply enters AC voltage adjusting circuit (1) after electromagnetic interface filter, power frequency isolation transformer (2) boosting is received in output, obtain two tunnel isolation three-phases to export, two tunnels export and export respectively through obtaining two road direct currents after three phase full bridge rectifying and wave-filtering, resonant network is received respectively after two road direct currents export series connection, be connected to pulse transformer centre tap (C) after series connection neutral earthing, resonant network exports receives deduster load (26) after high-frequency pulse transformer (19) boosting after capacitance (24) is in parallel with high frequency choke coil (35).
As shown in Figure 3, DC generating circuit is followed in series to form by three phase rectifier filter circuit, full bridge inverter, resonant network (31), high frequency transformer and high-voltage rectifier.High-voltage rectifier adopts voltage doubling rectifing circuit.DC generating circuit mesohigh rectification circuit adopts voltage doubling rectifing circuit.DC generating circuit also comprises high-frequency and high-voltage choke.
Three-phase alternating-current supply enters three phase rectifier filter circuit after electromagnetic interface filter, full bridge inverter is received in its output, full bridge inverter exports and receives resonant network (31), IGBT current detection circuit (32) is for detecting the electric current flowing through resonant network, resonant network exports and receives high frequency transformer (33), high-voltage rectifier (34) is received in high frequency transformer boosting output, and its output receives deduster load (26) after high frequency choke coil (35) is in parallel with capacitance (24).
operation principle of the present invention is as follows:
Control circuit is compared by AC voltage adjusting feedback voltage and setting, is adjusted the DC bus-bar voltage of pulse generating circuit by the control signal (4 ~ 20mA) changing AC voltage adjusting circuit.
Resonant network (17), IGBT(9 in pulse generating circuit), resonant network (18) series connection after access high-frequency pulse transformer, wherein IGBT is semi-bridge type IGBT module, and its mid point is connected to high-frequency pulse transformer centre tap (C).IGBT is open-minded, and resonant network 17 and the resonant network 18 of series connection are started working, and the energy in resonant network is delivered to output by high-frequency pulse transformer, forms pulse voltage and exports.After IGBT closes, the rectifying and wave-filtering of pulse generating circuit exports and transfers energy to resonant network, exports to supply pulse next time.The Voltage Pulse Width of high-frequency impulse circuit for generating adjusts by the parameter changing resonant network, and crest value of impulse voltage adjusts by changing DC bus-bar voltage, and pulse power supply power can lead to change IGBT switching frequency and adjust.
In DC generating circuit full bridge inverter three phase rectifier filtering is exported the direct voltage obtained become high frequency square wave export, after resonant network (31), obtain high frequency sinusoidal be input to the former limit of high frequency transformer, after high frequency transformer (33) boosting, send into high-voltage rectifier (34) obtain high voltage direct current output, high voltage direct current exports amplitude and adjusts by the operating frequency changing full bridge inverter (31).
Control circuit gathers the signals such as DC bus-bar voltage, resonant network electric current, output voltage and electric current, after isolation and conditioning, deliver to control system.For ensureing the safe operation of circuit, temperature sensing circuit delivers to control circuit by after the temperature signal collection of rectifier bridge, IGBT module and transformer, and when temperature exceedes set point, perform overheat protector, close drive singal, power supply quits work.The voltage of each main node, current status and status signal when the real-time monitoring power supply of signal deteching circuit runs; corresponding protection act can be performed in time when there are abnormal conditions; ensure the safety of power supply, stable operation; power supply real-time running data can be reached ipc monitor picture by communicating circuit, also allows to carry out long-range and local operation by host computer to power supply simultaneously.
Claims (7)
1. an electrostatic dust-removing DC pulse electric supply installation, comprises three-phase alternating-current supply, DC generating circuit, pulse generating circuit, biasing circuit and control circuit, it is characterized in that:
Described DC generating circuit is followed in series to form by three phase rectifier filter circuit, full bridge inverter, resonant network, high frequency transformer and high-voltage rectifier;
Described pulse generating circuit is followed in series to form by AC voltage adjusting circuit, Industrial Frequency Transformer, three phase rectifier filter circuit, resonant network and high-frequency pulse transformer.
2. electrostatic dust-removing DC pulse electric supply installation according to claim 1, is characterized in that: described pulse generating circuit medium-high frequency pulse transformer includes D.C. magnetic biasing circuit, and D.C. magnetic biasing circuit comprises DC power supply, current-limiting resistance and high frequency choke coil.
3. electrostatic dust-removing DC pulse electric supply installation according to claim 1, is characterized in that: the resonant network of described pulse generating circuit adopts the mode of two resonant circuits series connection; High-frequency pulse transformer adopts three tap modes, and centre tap ground connection.
4. electrostatic dust-removing DC pulse electric supply installation according to claim 1, is characterized in that: described three-phase alternating-current supply powers to respectively after three-phase electromagnetic interface filter DC generating circuit and pulse generating circuit.
5. electrostatic dust-removing DC pulse electric supply installation according to claim 1, is characterized in that: described DC generating circuit mesohigh rectification circuit adopts voltage doubling rectifing circuit.
6. electrostatic dust-removing DC pulse electric supply installation according to claim 1,2,3,4 or 5, it is characterized in that: described DC generating circuit also comprises high-frequency and high-voltage choke, DC generating circuit accesses deduster load after exporting series connection high-frequency and high-voltage choke.
7. electrostatic dust-removing DC pulse electric supply installation according to claim 1, is characterized in that: described control circuit comprises accessory power supply, DSP+FPGA double-core control system, digital/analog signal sampling modulate circuit, temperature sensing circuit, driving/protective circuit and communicating circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410565284.9A CN104253560A (en) | 2014-10-22 | 2014-10-22 | Direct current pulse power supply device for electric dust precipitation |
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| CN201410565284.9A CN104253560A (en) | 2014-10-22 | 2014-10-22 | Direct current pulse power supply device for electric dust precipitation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018940A (en) * | 2016-05-23 | 2016-10-12 | 镇江天力变压器有限公司 | Analog and digital signal conditioning circuit for electrostatic dedusting power control system |
| CN107342701A (en) * | 2017-08-16 | 2017-11-10 | 北京无线电测量研究所 | A kind of adjusting method of high-voltage pulse power source and high-voltage pulse |
| CN107733245A (en) * | 2017-10-25 | 2018-02-23 | 湖北新空电气有限公司 | A kind of efficiently amplitude modulation perseverance high-frequency electric dust removal power circuit |
| CN108134524A (en) * | 2017-12-18 | 2018-06-08 | 中国电子科技集团公司第四十研究所 | A kind of programme-controlled dc power control circuit |
| CN109382211A (en) * | 2017-08-14 | 2019-02-26 | 北京吉鼎环保科技有限公司 | The electrostatic precipitation pulse power |
-
2014
- 2014-10-22 CN CN201410565284.9A patent/CN104253560A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018940A (en) * | 2016-05-23 | 2016-10-12 | 镇江天力变压器有限公司 | Analog and digital signal conditioning circuit for electrostatic dedusting power control system |
| CN109382211A (en) * | 2017-08-14 | 2019-02-26 | 北京吉鼎环保科技有限公司 | The electrostatic precipitation pulse power |
| CN109382211B (en) * | 2017-08-14 | 2024-05-07 | 北京吉鼎环保科技有限公司 | Electrostatic dust removal pulse power supply |
| CN107342701A (en) * | 2017-08-16 | 2017-11-10 | 北京无线电测量研究所 | A kind of adjusting method of high-voltage pulse power source and high-voltage pulse |
| CN107733245A (en) * | 2017-10-25 | 2018-02-23 | 湖北新空电气有限公司 | A kind of efficiently amplitude modulation perseverance high-frequency electric dust removal power circuit |
| CN107733245B (en) * | 2017-10-25 | 2019-12-03 | 湖北新空电气有限公司 | A kind of efficient amplitude modulation perseverance high-frequency electric dust removal power circuit |
| CN108134524A (en) * | 2017-12-18 | 2018-06-08 | 中国电子科技集团公司第四十研究所 | A kind of programme-controlled dc power control circuit |
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Application publication date: 20141231 |
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