CN108667282A - A kind of exchange output filter capacitor inrush phenomenon inhibits topological circuit and suppressing method - Google Patents
A kind of exchange output filter capacitor inrush phenomenon inhibits topological circuit and suppressing method Download PDFInfo
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- CN108667282A CN108667282A CN201810424127.4A CN201810424127A CN108667282A CN 108667282 A CN108667282 A CN 108667282A CN 201810424127 A CN201810424127 A CN 201810424127A CN 108667282 A CN108667282 A CN 108667282A
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- phase
- power grid
- pwm
- controller
- filter capacitor
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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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
-
- 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
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
-
- 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 invention provides a kind of exchange output filter capacitor inrush phenomenon inhibition topological circuit based on wind electric converter, including major loop and control loop, control loop includes PWM inverter in converter module, LC filters, net side switchs, electric network voltage detection device, controller, three-phase uncontrollable rectifier device, three-phase resistance, pre-charge contactor；The ac output end of PWM inverter connect with LC filters and is connected to power grid by net side switch, the voltage detecting point of power grid is connected to power grid input terminal, the testing result of voltage detecting point feeds back to controller by electric network voltage detection device, three-phase resistance is concatenated with pre-charge contactor, one end is connect with the exchange side of three-phase uncontrollable rectifier device, other end is connect with power grid input terminal, and the positive and negative terminal of three-phase uncontrollable rectifier device and the DC side positive and negative terminal of PWM inverter connect.The invention can effectively inhibit the adverse effect that ac filter capacitance inrush phenomenon generates.
Description
Technical field
The invention belongs to power electronics control technology field, closes a floodgate more particularly, to a kind of exchange output filter capacitor
Surge suppression topological circuit and suppressing method.
Background technology
For wind electric converter as electricity generation system, net side inverter is all to use PWM inverter, therefore consider that grid-connected harmonic wave is asked
Topic, is substantially all and uses LC/LCL mode filters, it is contemplated that inductance L costs are higher, so C to be generally selected as to larger number
Value, cause in this way capacitance had when closing a floodgate it is larger shove, this, which shoves, can damage capacitor, while can also be generated to power grid certain
Impact.
Mainly have in existing way, in capacitive branch series limiting resistor device, combined floodgate can be effectively reduced in this way and gushed
Stream, but resistance has larger fever wherein, first, influencing overall system efficiency, and is the increase in cost.Another
Way is in capacitive branch series inductance as current limliting, but when inductance value is larger, can equally increase cost, additionally, due to inductance
Oscillation is easily caused with capacitance, and since the higher pressure drop on inductance of harmonic frequency is too big, influences filter effect.
Also there is the respective switch for inhibiting capacitance to shove in the market, the principle of switch is selected by judging voltage-phase
The property corresponding phase capacitance of switching ensures capacitance inrush phenomenon in prescribed limit with this, can also increase cost in this way, in addition by
In increasing mechanical switch, so increasing unreliable factor.
Invention content
In view of this, the invention is directed to a kind of exchange output filter capacitor inrush phenomenon inhibition topological circuit,
To solve the problems, such as to mention in above-mentioned background technology.
In order to achieve the above objectives, the technical solution of the invention is realized in：
A kind of exchange output filter capacitor inrush phenomenon based on wind electric converter inhibits topological circuit, including major loop and
Control loop, control loop include PWM inverter in converter module, LC filters, net side switch, network voltage detection dress
It sets, controller, three-phase uncontrollable rectifier device, three-phase resistance, pre-charge contactor；
The ac output end of PWM inverter connect with LC filters and is connected to power grid, the electricity of power grid by net side switch
Pressure test point is connected to power grid input terminal, and the testing result of voltage detecting point feeds back to control by electric network voltage detection device
Device, three-phase resistance are concatenated with pre-charge contactor, and one end is connect with the exchange side of three-phase uncontrollable rectifier device, other end and power grid
Input terminal connects, and the positive and negative terminal of three-phase uncontrollable rectifier device and the DC side positive and negative terminal of PWM inverter connect；
Major loop includes the PWM rectifier in sequentially connected motor, inductance and converter module.
Compared with the existing technology, a kind of exchange output filter capacitor based on wind electric converter described in the invention closes
Lock surge suppression topological circuit has the advantage that：
The present invention provides a kind of exchange side output filter capacitor inrush phenomenon suppressing method suitable for wind electric converter, can
The adverse effect for effectively inhibiting ac filter capacitance inrush phenomenon to generate.
Description of the drawings
The attached drawing for constituting the part of the invention is used for providing further understanding the invention, present invention wound
The illustrative embodiments and their description made do not constitute the improper restriction to the invention for explaining the invention.
In attached drawing：
Fig. 1 is the topological circuit schematic diagram described in the invention embodiment；
Fig. 2 is the control block diagram described in the invention embodiment；
Fig. 3 is the control flow chart described in the invention embodiment.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the invention can
To be combined with each other.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments creates.
As shown in Figs. 1-3, the invention includes PWM inverter, LC filters, net side switch, network voltage detection, control
Device processed, three-phase uncontrollable rectifier device, three-phase resistance, pre-charge contactor.Wherein PWM inverter ac output end connects with LC filters
It connects and power grid is connected to by net side switch, network voltage detection point is connected to power grid input terminal, and network voltage detection is fed back to
Controller.Three-phase resistance is concatenated with preliminary filling electrical contact, and one end is connect with the exchange side of three-phase uncontrollable rectifier device, other end and electricity
Net input terminal connects, and the positive and negative terminal of three-phase uncontrollable rectifier device and the DC side positive and negative terminal of PWM inverter connect.
When controller detects that power grid has electricity, precharge switch is closed, is given by three-phase resistance and three-phase uncontrollable rectifier device
The DC bus capacitor of PWM charges.
Controller is transformed into alpha-beta coordinates by detecting network voltage, by power grid three-phase voltage by two-phase is static
System generates PWM generator input reference using angle compensation, generates SVPWM by PWM generator, and exported by controller
It is worth the IGBT of inverter；
It exports PWM and passes through ac output end LC filters, it is consistent in net side switch ends formation phase, it is electric similar in amplitude
Corrugating, then carry out net side switch and be closed, completes capacitance and closes a floodgate, then disconnect and charge switch, in this way can filter capacitor pass through it is inverse
Become the PWM precharge of device, when can ensure that net side switch closes a floodgate, capacitance current is without impact.
As shown in Fig. 2, the power grid three-phase voltage UabcL of acquisition arrived, 2 mutually static seats are converted by 3 phase rest frames
Mark system, is converted into U α β L；Transformation equation is：
Due to being filtered acquisition circuit etc., needs voltage U α β L passing through angle compensation θ, obtain U α β L*, mend
Repaying equation is：
The U α β L* that compensation obtains are input to SVPWM modules, inverter output PWM is allowed to filter to obtain sinusoidal electricity by LC
Pressure allows net side switch to close a floodgate, to reduce the impact that capacitance combined floodgate is brought.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection domain within.
Claims (4)
1. a kind of exchange output filter capacitor inrush phenomenon based on wind electric converter inhibits topological circuit, it is characterised in that：Packet
Include major loop and control loop, control loop includes PWM inverter in converter module, LC filters, net side switch, power grid
Voltage check device, controller, three-phase uncontrollable rectifier device, three-phase resistance, pre-charge contactor；
The ac output end of PWM inverter connect with LC filters and is connected to power grid, the voltage inspection of power grid by net side switch
Measuring point is connected to power grid input terminal, and the testing result of voltage detecting point feeds back to controller by electric network voltage detection device, and three
Phase resistance is concatenated with pre-charge contactor, and one end is connect with the exchange side of three-phase uncontrollable rectifier device, and other end is inputted with power grid
End connection, the positive and negative terminal of three-phase uncontrollable rectifier device and the DC side positive and negative terminal of PWM inverter connect；
Major loop includes the PWM rectifier in sequentially connected motor, inductance and converter module.
2. a kind of ac filter capacitance inrush phenomenon suppressing method being carried out wind electric converter using claim 1, feature are existed
In：Specifically comprise the following steps：
(1) the exchange output filter capacitor inrush phenomenon based on wind electric converter is set and inhibits topological circuit；
(2) when controller detects that power grid has electricity, precharge switch is closed, is given by three-phase resistance and three-phase uncontrollable rectifier device
The DC bus capacitor of PWM charges；
(3) power grid three-phase voltage is transformed into alpha-beta coordinates by controller by detecting network voltage by two-phase is static
System generates PWM generator input reference using angle compensation, generates SVPWM by PWM generator, and exported by controller
It is worth the IGBT of inverter；
(4) output PWM passes through ac output end LC filters, consistent in net side switch ends formation phase, electric similar in amplitude
Corrugating, then carry out net side switch and be closed, it completes capacitance and closes a floodgate, then disconnect and charge switch.
3. a kind of exchange output filter capacitor inrush phenomenon inhibition side based on wind electric converter according to claim 2
Method, it is characterised in that：In the step (3), the power grid three-phase voltage UabcL of acquisition arrived is converted by 3 phase rest frames
2 phase rest frames are converted into U α β L；Transformation equation is：
4. a kind of exchange output filter capacitor inrush phenomenon inhibition side based on wind electric converter according to claim 3
Method, it is characterised in that：In the step (3), it is contemplated that due to acquisition circuit etc. filters, need voltage U α β L by angle
Degree compensation θ, obtains U α β L*, and compensation equation is：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810424127.4A CN108667282A (en) | 2018-05-07 | 2018-05-07 | A kind of exchange output filter capacitor inrush phenomenon inhibits topological circuit and suppressing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810424127.4A CN108667282A (en) | 2018-05-07 | 2018-05-07 | A kind of exchange output filter capacitor inrush phenomenon inhibits topological circuit and suppressing method |
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| CN108667282A true CN108667282A (en) | 2018-10-16 |
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| CN201810424127.4A Pending CN108667282A (en) | 2018-05-07 | 2018-05-07 | A kind of exchange output filter capacitor inrush phenomenon inhibits topological circuit and suppressing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728584A (en) * | 2019-03-11 | 2019-05-07 | 江苏罗宾康自动化科技有限公司 | A kind of AFE active front end PWM method for rectifying |
| CN110971116A (en) * | 2019-12-24 | 2020-04-07 | 湖南时铭电气有限公司 | Soft start circuit and soft start method of voltage source type inverter |
| CN117060752A (en) * | 2023-10-12 | 2023-11-14 | 广东省洛仑兹技术股份有限公司 | Alternating current precharge control circuit and method for PWM rectifier |
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| CN102222939A (en) * | 2011-06-28 | 2011-10-19 | 南车株洲电力机车研究所有限公司 | Grid-connected control method and device by utilizing grid-side converter of doubly-fed wind-driven generator set |
| CN102820771A (en) * | 2012-08-10 | 2012-12-12 | 深圳市禾望电气有限公司 | Soft start device and soft start method of converter equipment |
| CN102916437A (en) * | 2011-12-24 | 2013-02-06 | 许继集团有限公司 | Soft grid connection method of grid-connected converter |
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2018
- 2018-05-07 CN CN201810424127.4A patent/CN108667282A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102222939A (en) * | 2011-06-28 | 2011-10-19 | 南车株洲电力机车研究所有限公司 | Grid-connected control method and device by utilizing grid-side converter of doubly-fed wind-driven generator set |
| CN102916437A (en) * | 2011-12-24 | 2013-02-06 | 许继集团有限公司 | Soft grid connection method of grid-connected converter |
| CN102820771A (en) * | 2012-08-10 | 2012-12-12 | 深圳市禾望电气有限公司 | Soft start device and soft start method of converter equipment |
Non-Patent Citations (1)
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| 冯垛生: "《无速度传感器矢量控制原理与实践》", 30 April 1997, 机械工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728584A (en) * | 2019-03-11 | 2019-05-07 | 江苏罗宾康自动化科技有限公司 | A kind of AFE active front end PWM method for rectifying |
| CN110971116A (en) * | 2019-12-24 | 2020-04-07 | 湖南时铭电气有限公司 | Soft start circuit and soft start method of voltage source type inverter |
| CN117060752A (en) * | 2023-10-12 | 2023-11-14 | 广东省洛仑兹技术股份有限公司 | Alternating current precharge control circuit and method for PWM rectifier |
| CN117060752B (en) * | 2023-10-12 | 2024-02-27 | 广东省洛仑兹技术股份有限公司 | Alternating current precharge control circuit and method for PWM rectifier |
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Application publication date: 20181016 |