CN105763037A - Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer - Google Patents
Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer Download PDFInfo
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- CN105763037A CN105763037A CN201610326510.7A CN201610326510A CN105763037A CN 105763037 A CN105763037 A CN 105763037A CN 201610326510 A CN201610326510 A CN 201610326510A CN 105763037 A CN105763037 A CN 105763037A
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- catalyst
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- buck
- rectifier bridge
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
A precharge soft starting circuit for a three-phase voltage type bi-directional PWM current transformer comprises a first contactor K1, a three-phase diode rectifier bridge TM, a BUCK-BOOST circuit, a second contactor K2 and a DSP, wherein a three-phase alternating voltage source is connected with the alternating-current side of the three-phase diode rectifier bridge TM through the first contactor, the direct-current side of the three-phase diode rectifier bridge TM is connected with the BUCK-BOOST circuit, the BUCK-BOOST circuit is connected with the second contactor K2, the second contactor K2 is connected with the two sides of a direct-current end bus capacitor, and the first contactor K1, the controlled end of the BUCK-BOOST circuit and the second contactor K2 are all connected with the control end of the DSP. Current surge in the starting process is effectively avoided, so that service life is prolonged.
Description
Technical field
The present invention relates to a kind of three-phase voltage type two-way PWM converter technology, particularly relate to three
Phase voltage type two-way PWM converter precharge soft starting circuit.
Background technology
In recent years, along with the development of industry, some high-tech sensitive equipments were to electric energy matter
The requirement of amount is more and more higher, in order to obtain the higher quality of power supply, and the two-way PWM of three-phase voltage type
Current transformer research is gradually valued by the people.The two-way PWM converter of three-phase voltage type has especially
And there is current on line side low harmony wave, unity power factor, energy in bidirectional flow and constant dc
The advantages such as pressure, it is possible to realize " the green conversion " of electric energy.
During the two-way PWM converter of three-phase voltage type starts, current impact shows
Obtaining increasingly important, excessive dash current can affect the stability of system, shortens making of current transformer
The switching tube IGBT of current transformer even can be punctured with the life-span.
Summary of the invention
In order to overcome the start-up course of the two-way PWM converter of existing three-phase voltage type to be easily subject to
Rush of current, affect the deficiency in service life, the invention provides one and be prevented effectively from and started
The rush of current of journey, increase the service life be applicable to the two-way PWM converter of three-phase voltage type
Precharge soft starting circuit.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of precharge soft starting circuit being applicable to the two-way PWM converter of three-phase voltage type,
Described soft starting circuit include the first catalyst K1, three-phase diode rectifier bridge TM,
BUCK-BOOST step-up/step-down circuit, the second catalyst K2 and dsp processor, three-phase
Alternating-current voltage source is connected with the AC of three-phase diode rectifier bridge TM by the first catalyst,
The DC side of described three-phase diode rectifier bridge TM and BUCK-BOOST step-up/step-down circuit,
Described BUCK-BOOST step-up/step-down circuit and the second catalyst K2 connect, and described second connects
Tentaculum K2 is connected with the both sides of DC terminal bus capacitor, described first catalyst K1,
The controlled end of BUCK-BOOST step-up/step-down circuit, the second catalyst K2 all with DSP at
The control end of reason device connects.
Further, described BUCK-BOOST step-up/step-down circuit include controlled switch pipe IGBT7,
Reactor L0, power diode VD and the first electric capacity C0, controlled switch pipe IGBT7 sends out
Emitter-base bandgap grading is connected with the positive pole of three-phase diode rectifier bridge TM, the collection of controlled switch pipe IGBT7
Electrode is connected with the negative pole of power diode；Reactor L0 one end and controlled switch pipe IGBT7
Colelctor electrode be connected, the negative pole of the other end of reactor L0 and three-phase diode rectifier bridge TM
It is connected；The positive pole of electrochemical capacitor C0 is connected with the positive pole of power diode VD, electrochemical capacitor
The negative pole of C0 is connected with the negative pole of three-phase diode rectifier bridge TM, the positive pole of electrochemical capacitor C0
All it is connected with catalyst K2 with negative pole；The grid of described controlled switch pipe IGBT7 is
The controlled end of BUCK-BOOST step-up/step-down circuit.
The technology of the present invention is contemplated that: the two-way PWM converter of described three-phase voltage type is pre-charged
Soft starting circuit, improves certain reference voltage level in start-up course within a fixed time
Mode dc-link capacitance is slowly charged, when dc-link capacitance is charged to reference voltage
During value, start the two-way PWM converter of three-phase voltage type, when DC terminal current stabilization one timing
Hou Hou, switches DC terminal resistance, increases electric current, enters normal mode of operation.This circuit is special
Levy overshoot current when being to start little, start fast.
Described three-phase voltage type two-way PWM converter precharge soft starting circuit, at DC side
Use boost booster circuit that dc-link capacitance carries out oblique line formula boost charge, make current transformer
Start at nominal target magnitude of voltage, effectively eliminated dash current when starting.
Beneficial effects of the present invention is mainly manifested in: be prevented effectively from start-up course rush of current,
Increase the service life.
Accompanying drawing explanation
Fig. 1 is to comprise the present invention to be pre-charged the three-phase voltage type two way convertor of soft starting circuit
Schematic diagram.
Fig. 2 is the workflow diagram of precharge soft starting circuit.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
See figures.1.and.2, a kind of be applicable to the pre-of the two-way PWM converter of three-phase voltage type
Charging soft starting circuit, described soft starting circuit includes the first catalyst K1, three-phase diode
At rectifier bridge TM, BUCK-BOOST step-up/step-down circuit, the second catalyst K2 and DSP
Reason device, three-phase alternating current potential source is by the friendship of the first catalyst with three-phase diode rectifier bridge TM
Stream side connects, the DC side of described three-phase diode rectifier bridge TM and BUCK-BOOST liter
Reduction voltage circuit, described BUCK-BOOST step-up/step-down circuit and the second catalyst K2 connect,
Described second catalyst K2 is connected with the both sides of DC terminal bus capacitor, described first catalyst
The controlled end of K1, BUCK-BOOST step-up/step-down circuit, the second catalyst K2 are all and DSP
The control end of processor connects.
Further, described BUCK-BOOST step-up/step-down circuit include controlled switch pipe IGBT7,
Reactor L0, power diode VD and the first electric capacity C0, controlled switch pipe IGBT7 sends out
Emitter-base bandgap grading is connected with the positive pole of three-phase diode rectifier bridge TM, the collection of controlled switch pipe IGBT7
Electrode is connected with the negative pole of power diode；Reactor L0 one end and controlled switch pipe IGBT7
Colelctor electrode be connected, the negative pole of the other end of reactor L0 and three-phase diode rectifier bridge TM
It is connected；The positive pole of electrochemical capacitor C0 is connected with the positive pole of power diode VD, electrochemical capacitor
The negative pole of C0 is connected with the negative pole of three-phase diode rectifier bridge TM, the positive pole of electrochemical capacitor C0
All it is connected with catalyst K2 with negative pole；The grid of described controlled switch pipe IGBT7 is
The controlled end of BUCK-BOOST step-up/step-down circuit.
The three-phase voltage type two way convertor of the present embodiment includes three-phase alternating current potential source Es, LCL
Wave filter, the first switching tube IGBT1, second switch pipe IGBT2, the 3rd switching tube IGBT3,
4th switching tube IGBT4, the 5th switching tube IGBT5, the 6th switching tube IGBT6, preliminary filling
Soft starting circuit, catalyst K3, catalyst K4, catalyst K5, load R7, electric power storage
Pond group.
Described precharge soft starting circuit includes: three-phase diode rectifier bridge TM, catalyst K1,
Catalyst K2, power diode VD, reactor L0, the 7th switching tube IGBT7 (are i.e. subject to
Control switching tube), electrochemical capacitor C0.
Described dsp processor selects the dsp processor of Texas Instrument 2000 series.
The electrolysis electricity of the electrochemical capacitor Cbus on described dc bus, the most optional 10000uF
Hold, it is achieved stable DC side voltage and the effect of suppression direct current harmonic wave.
The reactance value of the reactor L0 of DC side and the capacitance of electrochemical capacitor C0 are all chosen bigger
Value.
The magnitude of voltage of DC side and relevant, the concrete formula of the dutycycle of the 7th switching tube IGBT7
For:
In formula: U0For output end voltage, E is three-phase commutation bridge output voltage, tonIt it is a cycle
Interior 7th switching tube ON time, toffBeing the 7th switching tube turn-off time in the cycle, α is i.e.
It is that the 7th switching tube accounts for many ratios in a cycle.
As in figure 2 it is shown, the control method of soft start may is that
A., when the two-way PWM converter of three-phase voltage type starts, three-phase commutation bridge is first detected
Whether the voltage of input, i.e. line voltage is stable, if after unlatching limited of magnitude of voltage
Stablize in the range of normal voltage value in cycle, open precharge soft starting circuit, if voltage
Value fluctuated within limited cycle, beyond normal range, continued three-phase commutation bridge input
Voltage detects, and waits that voltage recovers normal.
B. 0～0.01s, catalyst K1, catalyst K2, and initial by DC terminal are closed
Voltage reference value is set as 0 volt.Calculate controlled switch pipe IGBT7 control signal PWM ripple
Dutycycle, the now dutycycle 0 of PWM ripple, control signal perseverance is low level, controlled opens
Close pipe IGBT7 to turn off.
C. at 0.01s～0.02s, the voltage reference value of DC terminal is set as 5 volts, calculates phase
The dutycycle answered, when control signal is high level, switching tube IGBT7 turns on, for reactance
Device L0 charges.When control signal is low level, switching tube IGBT7 turns off, due to power
The one-way conduction effect of diode VD, electric current flows out from the lower end of reactor L0, and upper end is flowed
Enter and charge for electric capacity C0 and DC terminal electric capacity Cbus, make magnitude of voltage stable at 5 volts.
D. between Kt～(K+1) t, t is 0.01s, the two-way PWM converter of three-phase voltage type
It is 5V that precharge soft starting circuit DC side reference voltage level is set to KU, △ U.Now
The voltage of three-phase voltage type two-way PWM converter precharge soft starting circuit DC side is less than
KU, dsp processor, according to voltage reference value, adjusts on the 7th switching tube IGBT7 grid
The dutycycle of pulse-width signal PWM, makes DC terminal voltage stable in desired value KU.
The most above-mentioned K is positive integer, K takes 1 successively, 2,3 ..., n, the above step of circulation
Suddenly, DC terminal voltage is raised to desired value from 0, until DC terminal voltage value stabilization is in target
Magnitude of voltage.
F. stable after desired value when DC terminal voltage, dsp processor output two-way low level
Signal at stop catalyst K1, catalyst K2, and export a road high level signal simultaneously
Guan Bi DC terminal soft starting circuit catalyst K5 and six road pwm control signals, three-phase voltage
Type PWM two way convertor normally works, when the magnitude of voltage of current transformer DC terminal is stablized
Reference value limited long-time after, dsp processor exports a road low level signal and closes catalyst
K5, exports a road high level signal Guan Bi catalyst K4, increases the charging current of DC terminal,
So far three-phase voltage type two-way PWM converter soft start is complete.
Claims (2)
1. it is applicable to a precharge soft starting circuit for the two-way PWM converter of three-phase voltage type, its
It is characterised by: described soft starting circuit includes the first catalyst K1, three-phase diode rectifier bridge
TM, BUCK-BOOST step-up/step-down circuit, the second catalyst K2 and dsp processor, three
Cross streams voltage source is connected by the AC of the first catalyst with three-phase diode rectifier bridge TM
Connecing, the DC side of described three-phase diode rectifier bridge TM lifts piezoelectricity with BUCK-BOOST
Road, described BUCK-BOOST step-up/step-down circuit and the second catalyst K2 connect, and described
Two catalyst K2 are connected with the both sides of DC terminal bus capacitor, described first catalyst K1,
The controlled end of BUCK-BOOST step-up/step-down circuit, the second catalyst K2 all with DSP process
The control end of device connects.
It is applicable to the precharge of the two-way PWM converter of three-phase voltage type the most as claimed in claim 1
Soft starting circuit, it is characterised in that: described BUCK-BOOST step-up/step-down circuit includes controlled
Switching tube IGBT7, reactor L0, power diode VD and the first electric capacity C0, controlled open
The emitter stage closing pipe IGBT7 is connected with the positive pole of three-phase diode rectifier bridge TM, controlled switch
The colelctor electrode of pipe IGBT7 is connected with the negative pole of power diode；Reactor L0 one end is with controlled
The colelctor electrode of switching tube IGBT7 is connected, the other end of reactor L0 and three-phase diode rectification
The negative pole of bridge TM is connected；The positive pole phase of the positive pole of electrochemical capacitor C0 and power diode VD
Even, the negative pole of electrochemical capacitor C0 is connected with the negative pole of three-phase diode rectifier bridge TM, electrolysis
The positive pole of electric capacity C0 and negative pole are all connected with catalyst K2；Described controlled switch pipe IGBT7
The controlled end that grid is BUCK-BOOST step-up/step-down circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326510.7A CN105763037A (en) | 2016-05-16 | 2016-05-16 | Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610326510.7A CN105763037A (en) | 2016-05-16 | 2016-05-16 | Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer |
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| Publication Number | Publication Date |
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| CN105763037A true CN105763037A (en) | 2016-07-13 |
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|---|---|---|---|
| CN201610326510.7A Pending CN105763037A (en) | 2016-05-16 | 2016-05-16 | Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602860A (en) * | 2017-02-23 | 2017-04-26 | 国网江西省电力公司赣东北供电分公司 | Small-impact-current low-voltage current converter soft-starting control method |
| CN108199575A (en) * | 2018-02-11 | 2018-06-22 | 天津瑞能电气有限公司 | A kind of high-power converter soft starting circuit |
| CN108631347A (en) * | 2018-05-02 | 2018-10-09 | 欣旺达电子股份有限公司 | The soft-start method and device of energy feedback type charging/discharging apparatus |
| CN109936203A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN110138196A (en) * | 2019-03-28 | 2019-08-16 | 深圳市禾望电气股份有限公司 | A kind of multiple branch circuit energy accumulation current converter direct current soft start control method and system |
| CN113381623A (en) * | 2021-07-05 | 2021-09-10 | 阳光电源股份有限公司 | Hydrogen production power supply system, hydrogen production device and hydrogen production method |
| CN113411001A (en) * | 2021-07-05 | 2021-09-17 | 阳光电源股份有限公司 | Hydrogen production power supply system, hydrogen production device and hydrogen production method |
| CN113424420A (en) * | 2018-10-30 | 2021-09-21 | 西门子股份公司 | Frequency converter with simplified pre-charging circuit |
| US11463009B2 (en) | 2018-10-24 | 2022-10-04 | Huawei Digital Power Technologies Co., Ltd. | Flying capacitor charging method and apparatus |
| CN117175925A (en) * | 2023-11-02 | 2023-12-05 | 深圳鹏城新能科技有限公司 | Anti-impact current soft-start direct-current power supply input circuit |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602860A (en) * | 2017-02-23 | 2017-04-26 | 国网江西省电力公司赣东北供电分公司 | Small-impact-current low-voltage current converter soft-starting control method |
| CN106602860B (en) * | 2017-02-23 | 2019-01-11 | 国网江西省电力公司赣东北供电分公司 | A kind of low pressure inverter soft start control method of small dash current |
| CN109936203A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN108199575A (en) * | 2018-02-11 | 2018-06-22 | 天津瑞能电气有限公司 | A kind of high-power converter soft starting circuit |
| CN108631347B (en) * | 2018-05-02 | 2020-08-28 | 欣旺达电子股份有限公司 | Soft start method and device for energy feedback type charging and discharging equipment |
| CN108631347A (en) * | 2018-05-02 | 2018-10-09 | 欣旺达电子股份有限公司 | The soft-start method and device of energy feedback type charging/discharging apparatus |
| US11463009B2 (en) | 2018-10-24 | 2022-10-04 | Huawei Digital Power Technologies Co., Ltd. | Flying capacitor charging method and apparatus |
| CN113424420A (en) * | 2018-10-30 | 2021-09-21 | 西门子股份公司 | Frequency converter with simplified pre-charging circuit |
| CN110138196A (en) * | 2019-03-28 | 2019-08-16 | 深圳市禾望电气股份有限公司 | A kind of multiple branch circuit energy accumulation current converter direct current soft start control method and system |
| CN113381623A (en) * | 2021-07-05 | 2021-09-10 | 阳光电源股份有限公司 | Hydrogen production power supply system, hydrogen production device and hydrogen production method |
| CN113411001A (en) * | 2021-07-05 | 2021-09-17 | 阳光电源股份有限公司 | Hydrogen production power supply system, hydrogen production device and hydrogen production method |
| CN113381623B (en) * | 2021-07-05 | 2023-10-31 | 阳光电源股份有限公司 | Hydrogen production power supply system, hydrogen production device and hydrogen production method |
| CN117175925A (en) * | 2023-11-02 | 2023-12-05 | 深圳鹏城新能科技有限公司 | Anti-impact current soft-start direct-current power supply input circuit |
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Application publication date: 20160713 |