CN104578737A - Bus discharging circuit of wind power generation converter - Google Patents
Bus discharging circuit of wind power generation converter Download PDFInfo
- Publication number
- CN104578737A CN104578737A CN201410795019.XA CN201410795019A CN104578737A CN 104578737 A CN104578737 A CN 104578737A CN 201410795019 A CN201410795019 A CN 201410795019A CN 104578737 A CN104578737 A CN 104578737A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- bus
- converter
- filter
- phase full
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007599 discharging Methods 0.000 title abstract description 5
- 238000010248 power generation Methods 0.000 title abstract 2
- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
- H02M1/32—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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
Abstract
The invention relates to a bus discharging circuit of a wind power generation converter. The discharging circuit comprises a three-phase full-bridge circuit composed of six IGBTs, wherein the three-phase full-bridge circuit is in parallel connection with a bus capacitor; the front end of the three-phase full-bridge circuit is in parallel connection with an alternating current capacitor and in series connection with a filter inductor in sequence from left to right. The bus discharging circuit has the advantages that software controls the IGBTs of the converter to open the loop for generating wave after the converter stops operation, the bus voltage is inverted onto the filter inductor and a capacitor of the converter, the inversion voltage is added to the capacitor due to the existence of the capacitance of the filter, a certain current flows through the capacitor, and the magnitude of the current depends on the capacity of the capacitor of the filter; moreover, the current also flows through the inductor in series connection with the capacitor, and the energy of the bus capacitor is quickly consumed through the internal resistance of the inductor, so that the bus voltage can be quickly reduced into a safe voltage range.
Description
Technical field
The present invention relates to bus discharge circuit, especially a kind of bus discharge circuit for wind-force generating converter.
Background technology
In electric power system experiment, there is this phenomenon: wind-force generating converter is when laboratory or field adjustable, the bus capacitor voltage of its inside reaches 1000 more and lies prostrate, so after machine is out of service, the voltage of the bus capacitor in current transformer can only be discharged by discharge resistance, discharge time is longer, just can open machine chamber door after the charge discharge causing laboratory worker or field personnel can only wait in bus capacitor and carry out associated maintenance and experimental work, otherwise there is no below safety relief to safe voltage in busbar voltage, staff removes to open cabinet door and carries out the danger that machine maintenance all likely gets an electric shock.The bus capacitor discharge mode that current transformer is in the market conventional is use high power wire wound resistor, and cement resistor etc., discharge time is all long, and generally all within 5 minutes, some discharge times are longer.
Summary of the invention
Invention provides a kind of bus discharge circuit of wind-force generating converter, its object is to solve the problems of the technologies described above, and provide a kind of fast by the practical circuit of bus capacitor charge discharging resisting, the time of releasing shortens greatly.
Technical scheme of the present invention: a kind of bus discharge circuit of wind-force generating converter, described discharge circuit comprises the three phase full bridge circuit that 6 IGBT are formed, described three phase full bridge circuit in parallel bus capacitor, the front end of a described three phase full bridge circuit from left to right ac capacitor in parallel, a serial connection filter inductance successively.
The invention has the advantages that: after current transformer is out of service, ripple is sent out in software control current transformer IGBT open loop, by in busbar voltage inversion to the filter inductance and electric capacity of current transformer, exist owing to there being the electric capacity of filter, inverter voltage is added on electric capacity, electric capacity is made to flow through certain electric current, the size of electric current depends on the capacitance size of filter capacity, also flow through the while of this electric current on the inductance of contacting mutually with electric capacity, the internal resistance of inductance consumes the energy of bus capacitor fast, and busbar voltage is reduced within the scope of safe voltage fast.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As Fig. 1, in accompanying drawing, Cac is ac filter electric capacity, and Cdc is bus capacitor, and L is filter inductance.
A kind of bus discharge circuit of wind-force generating converter, described discharge circuit comprises the three phase full bridge circuit that 6 IGBT are formed, described three phase full bridge circuit in parallel bus capacitor, the front end of a described three phase full bridge circuit from left to right ac capacitor in parallel, a serial connection filter inductance successively.
Ripple is sent out in current transformer software control PWM open loop, in the filter driving IGBT the high-tension energy inversion stored in bus capacitor Cdc to be formed to L and Cac, then the voltage of inversion is added on ac filter Cac and filter inductance L, ac filter Cac and filter inductance L flows through electric current, the size of electric current depends on the size of Cca capacitance and inverter voltage, but electric current flows through the internal resistance of inductance and the ESR of electric capacity, now the energy of bus capacitor will be consumed fast by internal resistance, and busbar voltage is also released within safe voltage scope thereupon fast.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (1)
1. the bus discharge circuit of a wind-force generating converter, it is characterized in that: described discharge circuit comprises the three phase full bridge circuit that 6 IGBT are formed, described three phase full bridge circuit in parallel bus capacitor, the front end of a described three phase full bridge circuit from left to right ac capacitor in parallel, a serial connection filter inductance successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410795019.XA CN104578737A (en) | 2014-12-22 | 2014-12-22 | Bus discharging circuit of wind power generation converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410795019.XA CN104578737A (en) | 2014-12-22 | 2014-12-22 | Bus discharging circuit of wind power generation converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104578737A true CN104578737A (en) | 2015-04-29 |
Family
ID=53094138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410795019.XA Pending CN104578737A (en) | 2014-12-22 | 2014-12-22 | Bus discharging circuit of wind power generation converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104578737A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100295554A1 (en) * | 2008-01-21 | 2010-11-25 | Timo Alho | Method for monitoring the condition of the capacitors of a dc-voltage intermediate circuit |
| CN101944759A (en) * | 2010-09-28 | 2011-01-12 | 深圳市禾望电气有限公司 | Capacitor discharge method of power electronic equipment bus |
| CN204258615U (en) * | 2014-12-22 | 2015-04-08 | 浙江海得新能源有限公司 | A kind of bus discharge circuit of wind-force generating converter |
-
2014
- 2014-12-22 CN CN201410795019.XA patent/CN104578737A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100295554A1 (en) * | 2008-01-21 | 2010-11-25 | Timo Alho | Method for monitoring the condition of the capacitors of a dc-voltage intermediate circuit |
| CN101944759A (en) * | 2010-09-28 | 2011-01-12 | 深圳市禾望电气有限公司 | Capacitor discharge method of power electronic equipment bus |
| CN204258615U (en) * | 2014-12-22 | 2015-04-08 | 浙江海得新能源有限公司 | A kind of bus discharge circuit of wind-force generating converter |
Non-Patent Citations (1)
| Title |
|---|
| 谢秉正, 东南大学出版社 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
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| WD01 | Invention patent application deemed withdrawn after publication |