CN105207516A - High-frequency, high-voltage and direct-current superposition high-voltage pulse power source used for conducting electric dedusting - Google Patents
High-frequency, high-voltage and direct-current superposition high-voltage pulse power source used for conducting electric dedusting Download PDFInfo
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Abstract
The invention discloses a high-frequency, high-voltage and direct-current superposition high-voltage pulse power source used for conducting electric dedusting. The power source comprises a high-frequency, high-voltage and direct-current power source body, a high-voltage pulse power source body and a coupled circuit; the high-frequency, high-voltage and direct-current power source body comprises a three-phase diode full-bridge non-controlled rectififying circuit, a high frequency IGBT full-bridge inverter, an LC filter, a high frequency transformer and a single-phase diode full bridge non-controlled rectifying circuit; the high-voltage pulse power source body comprises a three-phase bridge-type non-controlled rectifying circuit, a low voltage charge-discharge pulse formation loop, a pulse transformer, a high-voltage charge-discharge voltage controlled switch compression pulse loop and a transmission line voltage-multiplying loop; the coupled circuit comprises a direct current side inductor, an anti-reversion diode, a protective resistor and a capacitor at the pulse side. According to the power source, a rapping device adopts parallel connection of large capacitors and small capacitors for achieving the equivalent effect, 200 Hz pulsed voltage which has high-voltage direct-current bias, an approximate nanosecond-grade rising edge and subtleness-grade pulse width is generated by the rapping device, back corona can be effectively inhibited, high ratio resistance dust can be effectively removed, and meanwhile compared with existing dedusting devices, the good electricity-saving effect is achieved.
Description
Technical field
The present invention relates to electric precipitation, particularly a kind of electric precipitation high-frequency high-voltage direct-current superposes high-voltage pulse power source.
Background technology
Along with improving constantly of China's industrialized level, air pollution is also more and more serious, especially recent years haze weather constant generation, especially for China's Economic Development Mode is sounded the alarm.In order to administer air pollution, country constantly puts into effect severeer policy and industry standard, and " thermoelectricity air pollution emission standard " (GB13223-2011) of up-to-date implementation brings up to 30mg/m to thermal power plant's dust emission standard
3, key area even requires lower than 20mg/m
3, this is huge test for the thermal power plant of China's accounting more than 60% energy output, and traditional electrostatic precipitator is difficult to reach so strict requirement, so must update to conventional electrostatic deduster.It is through the feasible effective scheme of checking that the pulse power is powered, but the pulse power technological know-how property right being applied to practice is all returned to the homeland outer all.
Summary of the invention
The invention provides a kind of electric precipitation high-frequency high-voltage direct-current and superpose high-voltage pulse power source, this power supply is when considering the factors such as ash removal efficiency, integrated cost, operational reliability, maintenance difficulties, floor space, this power supply finally produces the pulse voltage of the 200Hz having high voltage direct current and be biased, nearly nanosecond rising edge and Microsecond grade pulsewidth on the rapping apparatus of electric precipitation, effectively can suppress inverse corona, and can effectively dedusting to high resistivity dust, relatively existing deduster has good power savings simultaneously.
Technical solution of the present invention is as follows:
A kind of electric precipitation high-frequency high-voltage direct-current superposes high-voltage pulse power source; its feature is: be made up of high-frequency high-voltage direct-current circuit, high-voltage pulse circuit and coupling circuit; described coupling circuit is made up of counnter attack diode, coupling inductance, protective resistance and capacitance; the high-frequency high-voltage direct-current that described high-frequency high-voltage direct-current circuit exports is applied on deduster through described counnter attack diode, coupling inductance, protective resistance successively, and the high-voltage pulse electric that described high-voltage pulse circuit exports flows through described capacitance and is applied on described deduster.
Described high-frequency high-voltage direct-current circuit and high-voltage pulse circuit are all through diode full-bridge rectification and for subsequent conditioning circuit provides DC power supply after capacitance voltage stabilizing filtering by three-phase 380V electric main.
Described high-frequency high-voltage direct-current circuit comprises: three-phase mains is through diode full-bridge rectification and through electric capacity of voltage regulation, for full-bridge IGBT inverter provides DC source, 500V direct voltage exports 20kHz high-frequency ac voltage after the inversion of this full-bridge IGBT inverter, high frequency transformer is input to after the 5th inductance and the 5th capacitor filtering, the output of this high frequency transformer obtains the very little 10kV high direct voltage of ripple through full-bridge diode rectification again, and this high direct voltage is connected on deduster through counnter attack diode, coupling inductance and protective resistance successively;
Described high-voltage pulse electric route low pressure charging and discharging circuit, pulse transformer, high-voltage charge and discharge loop, votage control switch, transmission line are formed;
Described low pressure impulse electricity loop, charge circuit is formed by LC voltage-multiplying circuit and the first thyristor, 4th electric capacity, 4th inductance and the former limit of pulse transformer and the second thyristor form discharge loop, the secondary of described pulse transformer is successively by the second diode, 5th buffer inductance in parallel and the 4th resistance, 5th electric capacity is connected and forms charge circuit, the secondary of described pulse transformer is connected in reverse parallel in after 3rd diode and the 3rd resistant series, the input of described votage control switch is connect at the node of the 5th described electric capacity and the 5th buffer inductance and the 4th resistance, the output of this votage control switch and the indirect variable resistor on ground, deduster is connected to by described transmission line and capacitance at the tie point of the output of described variable resistor and votage control switch
Described pulse transformer is middle-low frequency pulse transformer.
Technique effect of the present invention:
1, pulse transformer of the present invention is middle-low frequency pulse transformer, obtains 10kV pulse and only needs 1:5 no-load voltage ratio.Secondary anti-parallel diodes and resistance are in order to absorb pulse transformer reverse impulse energy.
2, votage control switch of the present invention is by the voltage of the secondary electric capacity of ranging pulse transformer, the conducting when voltage is flushed to maximum or exceed the threshold value of setting, this electric capacity discharges rapidly to variable resistor and transmission line and load, obtain burst pulse, and the huge compression rise time of pulse.5th electric capacity of the secondary of pulse transformer connects variable resistor through votage control switch.The conducting when the 5th capacitance voltage reaches maximum (or arranging a threshold value, action when being greater than), to variable resistor and transmission line and load discharge.Variable-resistance size determines pulse duration, so change the adjustable pulse duration of variable-resistance size to adapt to the requirement of different dedusting environment.
3, be connected with transmission line and capacitance between adjustable resistance with deduster.The effect of transmission line is doubled by the pulse voltage amplitude of load end, thus make the no-load voltage ratio of described pulse transformer reduce by 1/2nd, Comparatively speaking, provides cost savings.The effect of described capacitance prevents the side, direct voltage paired pulses loop of load end coupling superposition from impacting.
4, adopt transmission line can with π type equivalent electric circuit substitute, because load almost can regard open circuit as, according to row ripple total reflection principle, the output pulse of transmission line is 2 times of input pulse, namely transmission line Tr has multiplication of voltage effect, pulse transformer Tp1 no-load voltage ratio can be reduced half like this.
5, the present invention is through the simulation result display of professional simulation software, can be bordering on ns level rise time and tens us level pulse duration direct-current superposition pulse power source, can meet dust removal requirement for load provides to have.
6, the present invention finally can produce the pulse voltage of the 200Hz having high voltage direct current and be biased, nearly nanosecond rising edge and delicate level pulsewidth on the rapping apparatus of deduster, effectively can suppress inverse corona, and can effectively dedusting to high resistivity dust, relatively existing deduster has good power savings simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of high-frequency high-voltage direct-current of the present invention superposition high-voltage pulse coupling to precipitator energisation
Fig. 2 is high-voltage pulse circuit schematic diagram
Fig. 3 is high-frequency high-voltage direct-current circuit theory diagrams
Fig. 4 is thyristor switch signal sequence Matlab/Simulink simulation result
Fig. 5 is for being loaded into the voltage Matlab/Simulink simulation result of load (deduster)
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, but should not limit the scope of the invention with this.
As shown in Figure 1, electric precipitation high-frequency high-voltage direct-current of the present invention superposes high-voltage pulse power source, by high-frequency high-voltage direct-current circuit, high-voltage pulse circuit and coupling circuit composition, described coupling circuit is by counnter attack diode D1, coupling inductance L1, protective resistance R1 and capacitance C1 is formed, the high-frequency high-voltage direct-current that described high-frequency high-voltage direct-current circuit exports is successively through described counnter attack diode D1, coupling inductance L1 and protective resistance R1 is applied on deduster, the high-voltage pulse electric that described high-voltage pulse circuit exports flows through described capacitance C1 and is applied on described deduster.In figure, C2, R2 are the impedance of deduster.
As shown in Figure 2, described high-voltage pulse electric route low pressure charging and discharging circuit, pulse transformer Tp1, high-voltage charge and discharge loop, votage control switch S and transmission line Tr are formed;
Described low pressure impulse electricity loop, charge circuit is formed by LC voltage-multiplying circuit L2 and C4 and the first thyristor T1, 4th electric capacity C4, former limit and the second thyristor T2 of the 4th inductance L 4 and pulse transformer Tp1 form discharge loop, the secondary of described pulse transformer Tp1 is by the second diode D2 successively, 5th buffer inductance L5 in parallel and the 4th resistance R4, 5th electric capacity C5 is connected and forms charge circuit, 3rd diode D3 and the 3rd resistance R3 is connected in reverse parallel in the secondary of described pulse transformer Tp1 after connecting, the input of described votage control switch S is connect at the node of the 5th described electric capacity C5 and the 5th buffer inductance L5 and the 4th resistance R4, the output of this votage control switch S and the indirect variable resistor R5 on ground, deduster described in being connected with capacitance C1 by described transmission line Tr at the tie point of described variable resistor R5 and the output of votage control switch S.
Described low pressure preliminary discharge and recharge pulse shaping loop, by the charging of the first thyristor T1 control LC voltage-multiplying circuit, when capacitance voltage after charging complete is through the former limit electric discharge of the second thyristor T2 to pulse transformer Tp1, forms pulse.The trigger impulse of the first thyristor T1 and the second thyristor T2 is 200Hz square wave, and the trigger impulse of the second thyristor T2 compares the first thyristor T1 trigger impulse needs certain time-delay, to ensure electric capacity charging complete in LC resonant circuit.First thyristor T1 and the second thyristor T2 forward voltage are no more than 1200V in this scenario, and reverse voltage also can not more than 1200V, and current peak is less than 450A, and current changing rate is lower than 50A/us, and existing thyristor product can meet the demands.3rd thyristor T3 and the 3rd inductance L 3 provide release path for the reverse charging of the 4th electric capacity C4, and the turn-on condition of the 3rd thyristor T3 is that the voltage at the 4th electric capacity C4 two ends is less than or equal to zero.
High voltage secondary charging and discharging circuit, is made up of the secondary of pulse transformer Tp1 and diode and buffer circuit and electric capacity, votage control switch.Diode requires that 5kV's is withstand voltage, and single diode does not reach so high-tension withstand voltage, can select multiple Diode series.The input of votage control switch S is the voltage detecting value of the 5th electric capacity C5, when higher than action conducting during threshold value, allows the 5th electric capacity C5 discharge rapidly to adjustable resistance R5, produces burst pulse.The ON time of votage control switch determines the rise time of pulse, and the size of adjustable resistance determines pulse duration, selects suitable votage control switch and resistance can obtain the pulse parameter of expecting.
Transmission line Tr adopts π type equivalent model, and its effect is pulse delay and in load end multiplication of voltage.
Described deduster load end is connected to finally by a high voltage bearing capacitance C1.
The direct current that high-frequency high-voltage direct-current circuit and impulse circuit obtain with same set of commercial power rectification is as power supply.Produce the higher alternating voltage of frequency through IGBT full-bridge inverter, obtain the less direct voltage of ripple through diode full-bridge rectification after being boosted by high frequency transformer, be connected to load end through diode, protective resistance and coupling inductance.
Elementary discharge and recharge pulse shaping loop relates to two basic processes, and one is that the first thyristor T1 conducting is charged rapidly to the 4th electric capacity C4, and two is second thyristor T2 conductings, and the 4th electric capacity C4 discharges rapidly to pulse transformer Tp1.Realize the reasonability that these two steps the most important thing is the conducting sequential of the first thyristor T1 and the second thyristor T2.In the present invention, for 200Hz pulse, pulse period is 5ms, as shown in Figure 4, the charging and discharging circuit parameter designing of primary pulse must ensure that the discharge and recharge time (t ' and t ") can not exceed the half of pulse period, and all must be less than T1 and T2 ON time (be respectively T ' and T ").The ON time of thyristor, greatly about about 10us, is enough to meet the pulse triggering 200Hz.
The 3rd thyristor T3 and the 3rd inductance L 3 is also had in elementary charging and discharging circuit, the turn-on condition of the 3rd thyristor T3 is when detecting that the voltage on the 4th electric capacity C4 is less than or equal to zero, key is the accuracy of voltage sample, its main purpose provides a reverse voltage Releasing loop to the 4th electric capacity C4, thus avoid the generation of negative pulse.
The time of the second thyristor T2 conducting is more delayed than the first thyristor T1 ON time, concrete lag time, length was according to thyristor conduction characteristic (ON time t1, turn-off time t2), capacitor charge and discharge time (charging interval t3, put a time t4), the pulse period (T) decides (t1<<t3<LEssT.LTss T.LTT/2, t2<<t4<LEssT.LTss T.LTT/2).Described high-voltage charge and discharge loop, the secondary of pulse transformer Tp1 through diode and buffer circuit to secondary capacitor charging.Pulse transformer Tp1 secondary anti-parallel diodes and resistance.
As shown in Figure 5, through the display of Matlab/Simulink software emulation result, power supply of the present invention finally can produce the pulse voltage (U of the 200Hz having high voltage direct current and be biased, nearly nanosecond rising edge and delicate level pulsewidth on rapping apparatus
load), effectively can suppress inverse corona, and can effectively dedusting to high resistivity dust, relatively existing deduster has good power savings simultaneously.
Claims (4)
1. an electric precipitation high-frequency high-voltage direct-current superposes high-voltage pulse power source, it is characterized in that: by high-frequency high-voltage direct-current circuit, high-voltage pulse circuit and coupling circuit composition, described coupling circuit is by counnter attack diode (D1), coupling inductance (L1), protective resistance (R1) and capacitance (C1) are formed, the high-frequency high-voltage direct-current that described high-frequency high-voltage direct-current circuit exports is successively through described counnter attack diode (D1), coupling inductance (L1) and protective resistance (R1) are applied on deduster, the high-voltage pulse electric that described high-voltage pulse circuit exports flows through described capacitance (C1) and is applied on described deduster.
2. electric precipitation high-frequency high-voltage direct-current according to claim 1 superposes high-voltage pulse power source, it is characterized in that: described high-frequency high-voltage direct-current circuit comprises: three-phase mains is through diode full-bridge rectification and through electric capacity of voltage regulation (C3), for full-bridge IGBT inverter provides DC source, 500V direct voltage exports 20kHz high-frequency ac voltage after the inversion of this full-bridge IGBT inverter, high frequency transformer (Tp2) is input to after the 6th inductance (L6) and the 7th electric capacity (C7) filtering, the output of this high frequency transformer obtains the very little 10kV high direct voltage of ripple through full-bridge diode rectification again, this high direct voltage passes through described counnter attack diode (D1) successively, coupling inductance (L1) and protective resistance (R1) are connected on deduster.
3. electric precipitation high-frequency high-voltage direct-current according to claim 1 superposes high-voltage pulse power source, it is characterized in that: described high-voltage pulse electric route low pressure charging and discharging circuit, pulse transformer (Tp1), high-voltage charge and discharge loop, votage control switch (S) and transmission line (Tr) are formed;
Described low pressure impulse electricity loop, charge circuit is formed by LC voltage-multiplying circuit (L2 and C4) and the first thyristor (T1), 4th electric capacity (C4), former limit and second thyristor (T2) of the 4th inductance (L4) and pulse transformer (Tp1) form discharge loop, the secondary of described pulse transformer (Tp1) is by the second diode (D2) successively, 5th buffer inductance (L5) in parallel and the 4th resistance (R4), 5th electric capacity (C5) is connected and forms charge circuit, 3rd diode (D3) and the 3rd resistance (R3) are connected in reverse parallel in the secondary of described pulse transformer (Tp1) after connecting, the input of described votage control switch (S) is connect at the node of the 5th described electric capacity (C5) and the 5th buffer inductance (L5) and the 4th resistance (R4), the output of this votage control switch (S) and the indirect variable resistor (R5) on ground, deduster described in being connected with capacitance (C1) by described transmission line (Tr) at the tie point of described variable resistor (R5) and the output of votage control switch (S).
4. electric precipitation high-frequency high-voltage direct-current according to claim 3 superposes high-voltage pulse power source, it is characterized in that: described pulse transformer is middle-low frequency pulse transformer.
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| CN105944837A (en) * | 2016-06-30 | 2016-09-21 | 广东佳德环保科技有限公司 | Novel efficient wet type electrical precipitator based on pulse power supply |
| CN106160561A (en) * | 2016-07-11 | 2016-11-23 | 南京航空航天大学 | The high-voltage pulse electric source circuit that a kind of band magnetic energy optimizes |
| CN106357147A (en) * | 2016-09-30 | 2017-01-25 | 西安交通大学 | High-effect large-current combination wave generating circuit |
| CN106872888A (en) * | 2017-03-07 | 2017-06-20 | 西安交通大学 | The vacuum interrupter ageing device and method of a kind of DC stacked high-voltage pulse |
| 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 |
| CN107947594A (en) * | 2017-12-18 | 2018-04-20 | 浙江大维高新技术股份有限公司 | Load-side series resonance high voltage power supply |
| PL426640A1 (en) * | 2018-08-10 | 2019-04-08 | Instytut Napędów I Maszyn Elektrycznych Komel | Protection of the transformer insulation system |
| CN109889079A (en) * | 2019-03-21 | 2019-06-14 | 大连友昕科技发展有限公司 | One kind is by thyristor controlled nanosecond class pulse generator for EDM |
| CN109967257A (en) * | 2019-05-13 | 2019-07-05 | 清华四川能源互联网研究院 | Pulse power generative circuit and electric precipitator |
| CN110420758A (en) * | 2019-07-17 | 2019-11-08 | 武汉东城新能源有限公司 | A kind of high power DC superimposed pulse power supply |
| CN110855176A (en) * | 2019-09-30 | 2020-02-28 | 浙江大维高新技术股份有限公司 | Novel circuit of ultra-high power pulse corona discharge plasma power supply |
| CN111426862A (en) * | 2020-04-16 | 2020-07-17 | 云南电网有限责任公司电力科学研究院 | Ripple test power supply system |
| CN112844846A (en) * | 2021-02-23 | 2021-05-28 | 上海丸西空环保科技有限公司 | Multi-frequency pulse discharge high-temperature flue gas dust collection device and dust collection method |
| CN114094869A (en) * | 2021-11-23 | 2022-02-25 | 成都科莱弗生命科技有限公司 | Circuit and method for realizing pulsed electric field technology |
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| CN105944837A (en) * | 2016-06-30 | 2016-09-21 | 广东佳德环保科技有限公司 | Novel efficient wet type electrical precipitator based on pulse power supply |
| CN106160561A (en) * | 2016-07-11 | 2016-11-23 | 南京航空航天大学 | The high-voltage pulse electric source circuit that a kind of band magnetic energy optimizes |
| CN106160561B (en) * | 2016-07-11 | 2018-11-23 | 南京航空航天大学 | A kind of high-voltage pulse electric source circuit with magnetic energy optimization |
| CN106357147A (en) * | 2016-09-30 | 2017-01-25 | 西安交通大学 | High-effect large-current combination wave generating circuit |
| CN106357147B (en) * | 2016-09-30 | 2019-02-05 | 西安交通大学 | A kind of high-effect high current combination wave generation circuit |
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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 |
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| CN109889079A (en) * | 2019-03-21 | 2019-06-14 | 大连友昕科技发展有限公司 | One kind is by thyristor controlled nanosecond class pulse generator for EDM |
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| CN109967257B (en) * | 2019-05-13 | 2024-02-06 | 清华四川能源互联网研究院 | Pulse power supply generation circuit and electric dust collector |
| CN110420758A (en) * | 2019-07-17 | 2019-11-08 | 武汉东城新能源有限公司 | A kind of high power DC superimposed pulse power supply |
| CN110855176A (en) * | 2019-09-30 | 2020-02-28 | 浙江大维高新技术股份有限公司 | Novel circuit of ultra-high power pulse corona discharge plasma power supply |
| CN111426862A (en) * | 2020-04-16 | 2020-07-17 | 云南电网有限责任公司电力科学研究院 | Ripple test power supply system |
| CN112844846A (en) * | 2021-02-23 | 2021-05-28 | 上海丸西空环保科技有限公司 | Multi-frequency pulse discharge high-temperature flue gas dust collection device and dust collection method |
| CN114094869A (en) * | 2021-11-23 | 2022-02-25 | 成都科莱弗生命科技有限公司 | Circuit and method for realizing pulsed electric field technology |
| CN114094869B (en) * | 2021-11-23 | 2024-01-09 | 融和医疗科技(浙江)有限公司 | Circuit and method for realizing pulsed electric field technology |
| CN115453301A (en) * | 2022-08-15 | 2022-12-09 | 山东大学 | Coupling circuit for space charge test and space charge test system |
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