CN202435295U - Simply controlled three-phase rectification boost circuit - Google Patents
Simply controlled three-phase rectification boost circuit Download PDFInfo
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- CN202435295U CN202435295U CN 201120560015 CN201120560015U CN202435295U CN 202435295 U CN202435295 U CN 202435295U CN 201120560015 CN201120560015 CN 201120560015 CN 201120560015 U CN201120560015 U CN 201120560015U CN 202435295 U CN202435295 U CN 202435295U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The utility model discloses a simply controlled three-phase rectification boost circuit, which comprises a wind generation set, a rectification circuit and a control module, wherein the output end of the wind generation set is connected with the input end of the rectification circuit; the control module is provided with a pulse-width modulation (PWM) pulse output end; the rectification circuit is provided with an isolation driver; the PWM pulse output end of the control module is connected with the isolation driver of the rectification circuit; three-phase input current and output direct current voltage signal of the rectification circuit output end are sent to the control module; and the PWM pulse output end of the control module sends a PWM pulse control signal to the rectification circuit. By adoption of the simply controlled three-phase rectification boost circuit, a motor can run under the condition of a unit power factor on the stator side, the voltage can be flexibly and reliably regulated, and the voltage which meets the requirement of a power grid can be output under the condition of relatively low input voltage. The boost circuit is novel in structure, high in practicability and low in cost, simply and conveniently controlled, easily implemented and can be applied to the field of wind power converters.
Description
Technical field
The utility model relates to a kind of AC-DC converter of electric and electronic technical field, specifically is a kind of easy three phase rectifier booster circuit of controlling, and can be used in the wind power generation as the three phase rectifier booster circuit.
Background technology
Along with the development of China's intelligent grid, the ratio of wind power generation distributed electricity generation system in whole energy resource structure progressively rises.Because it often is not the sine wave of standard that the unsteadiness of wind speed and load, and the reasons such as deficiency of wind-powered electricity generation converter design, wind energy conversion system drive the electric current of permagnetic synchronous motor (PMSG) generation.This can cause the PMSG torque pulsation, and loss increases, and problems such as power factor reduction influence the efficient of wind power system greatly, even causes the equipment damage.When wind speed was lower, the amplitude of the three-phase voltage that generator sends and frequency all can reduce, and causing conventional diode not control the voltage of the wind-powered electricity generation converter output of rectification can't feedback grid, and wind generator system gets into holding state, and wind energy utilization reduces.And the Three-Phase PWM Rectifier of input series connection boost inductance not only has boost function, and can realize the unity power factor operation, has a good application prospect in wind-powered electricity generation converter field.
In order to accomplish the output of alternating voltage input-standard line voltage, can adopt A-A transducer, also can adopt AC-DC-AC 2 stage converter structure.Wherein, A-A transducer comprises matrix converter and frequency converter, and the circuit of the A-A transducer of single-phase input is simple, and control easily; Cost is lower, but its function limitation, pressure regulation and frequency conversion ability; The low pressure ride-through capability is poor, and input power factor is low, if correct handling in addition not; Power frequency AC will the emergent power factor be 1 situation, and a large amount of harmonic currents can produce multiple harm, must dispose for this reason; The A-A transducer of three-phase input multiple functional, performance is high, but its complicated circuit, control loaded down with trivial details, the cost height, the low pressure ride-through capability is poor.Ac-dc-ac transform device single-phase, the three-phase input comprises two-layer configuration: prime AC-DC converter and back level DC-AC converter, and it is multiple functional, and performance is high, and the low pressure ride-through capability is strong, needs to adopt power factor corrector to reduce the side harmonics electric current.
Retrieval through to the wind-powered electricity generation converter technology of the existing application scenario that is fit to the output of alternating voltage input-standard line voltage finds, in " permanent magnet direct-drive wind power system current transformer topological analysis " (Electric Power Automation Equipment, 2008 the 4th phases 28 volume) the wind-powered electricity generation converter using of description diode control rectifying circuit not; Though circuit structure is simple; Practical, but harmonic content is high, and power factor is low; Output need connect the link of boosting, and is difficult to satisfy the requirement of line voltage; The wind-powered electricity generation convertor controls strategy of describing in " research of direct drive wind power system grid side converter control strategy " (regenerative resource, 2010 the 5th phases 28 volume) is complicated, and application difficulty is big especially.
In sum; A-A transducer is simple in structure, and cost is lower, but has pressure regulation and frequency conversion ability; The low pressure ride-through capability is poor; The deficiency that input power factor is low needs input power factor to proofread and correct and reduces the side harmonics interference, can not be applicable to the application scenario of alternating voltage input-standard line voltage output; Ac-dc-ac transform device performance is high, and the low pressure ride-through capability is strong, but controls loaded down with trivial detailsly, and cost is higher.Along with the expansion of practical application, design a kind of complete function, high input power factor, the simple wind-powered electricity generation converter of control strategy has become those skilled in the art's the task of top priority.
The utility model content
The utility model provides a kind of easy three phase rectifier booster circuit of controlling to the above-mentioned deficiency of prior art, achieves the AC-DC conversion; Has linear input impedance; Solve the low pressure crossing problem, the function that the output dc voltage up-down is adjustable is supported four-quadrant operation; Have simple in structurely, control advantage easy and with low cost.
The utility model is realized through following technical scheme; The utility model comprises: wind-powered electricity generation unit, rectification circuit and control module; Wherein: the output of said wind-powered electricity generation unit links to each other with the input of said rectification circuit; Said control module is provided with the pwm pulse output, and said rectification circuit is the Three-Phase PWM Rectifier that is provided with driver for isolating, and the pwm pulse output of said control module links to each other with the driver for isolating of said rectification circuit; The three-phase input current of rectification circuit output end and output dc voltage signal are sent into control module, and the pwm pulse output of said control module is sent the pwm pulse control signal into said rectification circuit.
Described wind-powered electricity generation unit comprises windmill, mechanical drive shaft and permagnetic synchronous motor, and windmill links to each other with permagnetic synchronous motor through mechanical drive shaft.
The structure of described rectification circuit is six the contrary three-phase full-controlled rectifier bridge that switch is formed, three boost inductances of input series connection of three-phase full-controlled rectifier bridge, output parallel connection filter capacitors of leading.The input of rectification circuit links to each other with the output of wind-powered electricity generation unit, and the output output dc voltage supplies back level inverter to use.The described contrary base stage of leading switch is accepted the pwm pulse control signal through the driver for isolating isolation.
Described control module is finally exported six road driving pulses for realizing the control circuit of carrier amplitude power factor correction strategy adjustable, the negative logic control mode.
The utility model carries out work in the following manner: the windmill capturing wind energy; Drive the permagnetic synchronous motor rotation through mechanical drive shaft; The output three-phase alternating voltage; This three-phase alternating voltage produces direct voltage stably through the Three-Phase PWM Rectifier rectification, and the back level can connect three-phase inverter and convert direct voltage into the three-phase alternating current feedback grid.Because input series connection boost inductance, Three-Phase PWM Rectifier can equivalence be the Boost booster circuit of three grades of parallel connections, and is less at wind-force, can guarantee that still the output voltage grade satisfies the requirement of electrical network under the lower situation of the voltage of generation.Three-Phase PWM Rectifier adopts the adjustable power factor correction algorithm of carrier amplitude, and making the motor side power factor is 1, guarantees the motor even running.Wherein the required inductive current of control module records through current transformer or current sensor, and output voltage records through linear isolation amplifier.
The easy three phase rectifier booster circuit of the control that is used for the wind-powered electricity generation conversion of the utility model design; Can realize flexibly, pressure regulation ability and obtain linear input impedance reliably; Overcome A-A transducer power supply and the fluctuation of load deficiency of mutual interference mutually, and under the lower situation of input voltage, still can guarantee to meet the voltage output that electrical network requires.The three phase rectifier booster circuit has advantages such as project organization novelty, highly versatile, control be easy in the utility model wind power generation.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
Embodiment
Embodiment in the face of the utility model elaborates down; Present embodiment is being to implement under the prerequisite with the utility model technical scheme; Provided detailed execution mode and concrete operating process, but the protection range of the utility model is not limited to following embodiment.
As shown in Figure 1, present embodiment provides a kind of easy three phase rectifier booster circuit of controlling, and comprising: wind-powered electricity generation unit 1, rectification circuit 2 and control module 3.Wherein: the output of wind-powered electricity generation unit 1 links to each other with the input of rectification circuit 2; Six road driving pulse outputs of control circuit 3 link to each other with the input of six driver for isolating of rectification circuit 2, and the three-phase input current of rectification circuit 2 and output dc voltage signal are sent into control module 3 (adopting control circuit to realize in the present embodiment).
Described wind-powered electricity generation unit 1 comprises windmill Tu1, mechanical drive shaft MS1 and permagnetic synchronous motor MG1, and windmill Tu1 links to each other with permagnetic synchronous motor MG1 through mechanical drive shaft MS1.
The structure of described rectification circuit 2 is six the contrary three-phase full-controlled rectifier bridge that switch S 1～S6 forms, three boost inductance L1～L3 of input series connection of three-phase full-controlled rectifier bridge, output parallel connection filter capacitor E1 of leading.The input of rectification circuit 2 links to each other with the output of wind-powered electricity generation unit 1, the output output dc voltage.The described contrary base stage of leading switch S 1～S6 is accepted the pwm pulse control signal through the driver for isolating isolation.In the present embodiment, described rectification circuit 2 is a traditional P WM rectifier, but the amplitude of input voltage and frequency receive the direct influence of wind-powered electricity generation unit, is in real time variable.
Described is 15kV/5A/100 ℃ of SiC power MOSFET against leading switch S 1～S6, adjustable according to the closed-loop control result against the duty ratio of the PWM driving pulse of leading switch, switching frequency 20kHz.
Described boost inductance L1～L3 is an amorphous material, adopts planar structure, and the sense value is 750 μ H.
Described filter capacitor E1 is alminium electrolytic condenser 2200 μ F/450V.
As shown in the figure, in the present embodiment, described control module 3 is for realizing the control circuit of the power factor correction algorithm that carrier amplitude is adjustable, negative logic PWM takes place; Output dc voltage reference value Uref and actual value are subtracted each other Uo; Behind the error filter amplifier, outer voltage produces voltage control quantity, multiplies each other with standard sawtooth carrier wave Cr1 again; Obtain the sawtooth carrier wave of Variable Amplitude, this sawtooth carrier wave more respectively with the rectification circuit 2 that detects in inductive current carry out i
L1, i
L2And i
L3Relatively, produce three tunnel original set pulse sequences, send into three rest-set flip-flops (bistable trigger) respectively, the reset signal S of the reset terminal of rest-set flip-flop reception simultaneously and accurate sawtooth carrier synchronization
Ync1, every original trigger impulse of two-way that rest-set flip-flop obtains reversed polarity, three rest-set flip-flops obtain the original drive signal of six road PWM altogether, and the label of power switch is corresponding one by one in the label of drive signal and the rectification circuit 2.
In the present embodiment, the input wind speed is 6m/s, and output dc voltage is 690V, and rated output power is 400kW.All components and parts all adopt high accuracy.
The three phase rectifier booster circuit of the utility model is as the wind-powered electricity generation converter; The alternating current of permagnetic synchronous motor output is transformed to meets the direct voltage that back level inverter requires; Can realize operation of motor side unity power factor and flexible, reliable pressure regulation ability; Overcome power supply and the fluctuation of load deficiency of mutual interference mutually, and under the lower situation of input voltage, still can guarantee to meet the voltage output that electrical network requires.Simultaneously, entire circuit is very simple, and it is few to detect electric weight and controlled electric weight, and control module employing carrier amplitude is adjustable, the power factor correction algorithm of negative logic pwm pulse mode, and design complexities reduces, and has obtained simulation analysis and experiment preliminary identification.And existingly do not control that rectification adds inversion, the common deficiency of handing over alternation to change scheme is: function limitation, control loaded down with trivial detailsly, be not easy to realization, pressure regulation and frequency conversion ability, the low pressure ride-through capability is poor, and input power factor is low.If correct handling in addition not, motor side power supply will the emergent power factor be 1 situation, a large amount of harmonic currents can produce multiple harm, increase like torque pulsation, loss, even the damage motor.
The utility model can realize flexibly, pressure regulation ability and obtain linear input impedance reliably; Overcome A-A transducer power supply and the fluctuation of load deficiency of mutual interference mutually; And under the lower situation of input voltage, still can guarantee to meet the voltage output that electrical network requires, need not to detect the three-phase alternating voltage of wind-powered electricity generation unit output.The three phase rectifier booster circuit has characteristics such as project organization novelty, highly versatile, control be easy in the utility model wind power generation.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection range of the utility model should be limited appended claim.
Claims (6)
1. control easy three phase rectifier booster circuit for one kind; Comprise: wind-powered electricity generation unit, rectification circuit and control module; It is characterized in that: the output of said wind-powered electricity generation unit links to each other with the input of said rectification circuit; Said control module is provided with the pwm pulse output, and said rectification circuit is the Three-Phase PWM Rectifier that is provided with driver for isolating, and the pwm pulse output of said control module links to each other with the driver for isolating of said rectification circuit; The three-phase input current of rectification circuit output end and output dc voltage signal are sent into control module, and the pwm pulse output of said control module is sent the pwm pulse control signal into said rectification circuit.
2. the three phase rectifier booster circuit that control according to claim 1 is easy; It is characterized in that; The structure of described rectification circuit is six the contrary three-phase full-controlled rectifier bridge that switch is formed, three boost inductances of input series connection of this three-phase full-controlled rectifier bridge, output parallel connection filter capacitors of leading; The input of rectification circuit links to each other with the output of wind-powered electricity generation unit, and the output output dc voltage supplies back level inverter to use.
3. the three phase rectifier booster circuit that control according to claim 2 is easy is characterized in that, the described contrary base stage of leading switch is accepted the pwm pulse control signal through the driver for isolating isolation.
4. the three phase rectifier booster circuit easy according to each described control of claim 1-3 is characterized in that, described rectification circuit is the amplitude of input voltage and the Three-Phase PWM Rectifier that frequency wind-engaging group of motors directly influences.
5. the three phase rectifier booster circuit easy according to the said control of claim 1-3 is characterized in that, described control module is for realizing the control circuit of carrier amplitude power factor correction strategy adjustable, the negative logic control mode.
6. the three phase rectifier booster circuit that control according to claim 1 is easy is characterized in that, described wind-powered electricity generation unit comprises windmill, mechanical drive shaft and permagnetic synchronous motor, and windmill links to each other with permagnetic synchronous motor through mechanical drive shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120560015 CN202435295U (en) | 2011-12-28 | 2011-12-28 | Simply controlled three-phase rectification boost circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120560015 CN202435295U (en) | 2011-12-28 | 2011-12-28 | Simply controlled three-phase rectification boost circuit |
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| CN202435295U true CN202435295U (en) | 2012-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120560015 Expired - Fee Related CN202435295U (en) | 2011-12-28 | 2011-12-28 | Simply controlled three-phase rectification boost circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337854A (en) * | 2013-05-17 | 2013-10-02 | 湖南大学 | Flexible direct-current power transmission access method based on intermediate frequency inversion |
| CN106100372A (en) * | 2016-07-01 | 2016-11-09 | 中国科学院地质与地球物理研究所 | A kind of electromagnetic survey transmitter installation |
| CN106887963A (en) * | 2017-04-28 | 2017-06-23 | 重庆三信电子股份有限公司 | A kind of power supply on vehicle system and MOSFET active rectifiers and control method |
-
2011
- 2011-12-28 CN CN 201120560015 patent/CN202435295U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337854A (en) * | 2013-05-17 | 2013-10-02 | 湖南大学 | Flexible direct-current power transmission access method based on intermediate frequency inversion |
| CN106100372A (en) * | 2016-07-01 | 2016-11-09 | 中国科学院地质与地球物理研究所 | A kind of electromagnetic survey transmitter installation |
| CN106887963A (en) * | 2017-04-28 | 2017-06-23 | 重庆三信电子股份有限公司 | A kind of power supply on vehicle system and MOSFET active rectifiers and control method |
| CN106887963B (en) * | 2017-04-28 | 2019-04-16 | 重庆三信电子股份有限公司 | A kind of power supply on vehicle system and MOSFET active rectifier and control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20121228 |