CN202309539U - Split-type high voltage frequency converter chain link power unit device - Google Patents
Split-type high voltage frequency converter chain link power unit device Download PDFInfo
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- CN202309539U CN202309539U CN2011203824838U CN201120382483U CN202309539U CN 202309539 U CN202309539 U CN 202309539U CN 2011203824838 U CN2011203824838 U CN 2011203824838U CN 201120382483 U CN201120382483 U CN 201120382483U CN 202309539 U CN202309539 U CN 202309539U
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Abstract
The utility model discloses a split-type high voltage frequency converter chain link power unit device, comprising a main loop of a chain link power unit which is formed by connecting an AC input protection unit (1), a rectification unit (2), a DC support capacitor unit (3), a DC discharge unit (4), an invert unit (5) and a bypass unit (6) orderly; and a control loop of the chain link power unit which is formed by connecting an energy-taking unit (7), a chain link control unit (8) and a driving protection unit orderly; wherein, the main loop an the control loop are connected via an optical fiber. The split-type high voltage frequency converter chain link power unit device is divided into two parts; wherein, one part is composed of a half of the DC support capacitor unit (3), the AC input protection unit (1) and the rectification unit (2) and is placed on a radiator I, the other part is composed of the other half of the DC support capacitor unit (3), the DC discharge unit (4), the invert unit (5), the bypass unit (6), the energy-taking unit (7) and the chain link control unit (8) and is placed on a radiator II, and the two parts are connected via a DC bus.
Description
Technical field:
The utility model relates to field of power electronics, specifically designs a kind of split type high voltage converter chain link power cell device.
Background technology:
Increasingly mature along with large power all-controlled power electronic device IGBT obtained extensive use based on the chain link power cell of IGBT in high voltage converter.The control energy obtain manner of the chain link power cell of manufacturers design employing at present all is to exchange perhaps direct current side-draw ability of side-draw.Fig. 1 has provided the schematic diagram of high voltage converter link units.
High voltage converter chain link power cell has been formed the major loop of chain link power cell by exchanging input protection unit 1, input rectifying unit 2, direct current support capacitor cell 3, direct-current discharge unit 4, inversion unit 5 and by-pass unit 6; Can unit 7 by getting, the control loop of the chain link power cell that constitutes of chain link controller unit 8 and drive protecting unit; Be connected through optical fiber between control loop and the major loop.Whole chain link power cell forms one and does the chain link power cell of two ends output by 101, the 102 and 103 three ends inputs, 104 and 105 formed, and wherein the voltage of three ends input normally passes through the voltage after the phase shifting transformer step-down.
Fig. 2 has provided the high voltage converter sketch map that is made up of several high voltage converter chain link power cells.3 groups of several chain link power cell left sides exchange end and are connected with the high pressure phase shifting transformer, and an end connects another termination high-voltage motor with the mode of Y-connection after every group of windings in series of the right interchange end.Can find out that from Fig. 1 and Fig. 2 high voltage converter itself has combined power electronic technology, control technology and high voltage technique, have higher relatively scientific and technological content.Simultaneously because the remarkable result of high voltage converter aspect energy-conservation, thereby make numerous manufacturers drop into the sector one after another.
But existing high voltage converter is faced with two problems in practical application: one is the powerup issue of chain link control unit; Another is the Structure Designing Problem of chain link power cell.
Because there is phase shifting transformer in high voltage converter, so getting to adopt more, existing high voltage converter chain link control unit gets the ability transformer, promptly adopting interchange to get can mode.Interchange get can mode schematic diagram as shown in Figure 3.
In Fig. 3, get and can supply with the general commercial Switching Power Supply after transformer 701 step-downs through chain link from any two ends (implementing to get ability) of three-phase alternating current input as 101 and 102, can realize the power supply of link units controller.This mode is simple, and is with low cost, thereby obtained the approval of numerous producers.
But exchange to get and to have bigger technical risk.On the one hand, when electric power system voltage generation quality of voltage problem, as when falling, exchange to get and to obtain, thereby make the control system power down, cause device to be in a kind of precarious position less than the required energy of control integrated circuit board; And when rising sharply, possibly make that get can transformer insulated damage, thereby cause the damage of device.In order to guarantee that the chain link control unit can obtain energy in very wide scope, must guarantee chain link get can transformer 701 in very wide scope internal linear work; Under the extreme case, if the AC side power down, the chain link power cell then can't be worked.Although high voltage converter is so high not as electric power system to the requirement of communication power supply, still can bring very big trouble after the communication power supply power down, or even loss.After the power down of chain link control unit, the IGBT gate leve is in power-down state, possible damage equipment; After the power down, the master control system of high voltage converter can't be carried out failure diagnosis to the chain link power cell, causes system-level debugging and safeguards very problem such as complicacy.
As can be seen from Figure 1, the chain link power cell of high voltage converter contains a large amount of power electronic device, like rectification unit 1, discharge cell 4, inversion unit 5 and by-pass unit 6.The existence of power electronic device means and must carry out radiating treatment to it, otherwise the time has been grown and possibly damage power electronic device.Existing high voltage converter chain link power cell adopts mostly all power electronic device are placed on the big radiator, and is as shown in Figure 5.
After exchanging input protection unit 1, get into the chain link power cell from the three-phase alternating current 101,102,103 of phase shifting transformer output.Exchange protected location 1 can be placed on the chain link power cell right flank and cell controller optical fiber interface at grade.Get and to be placed on upper side with chain link control unit 8 in unit 7, to reduce the width of chain link power cell.Rectifier bridge (being made up of diode) constitutes input rectifying unit 1, and inverter bridge (being made up of the IGBT module) is formed inversion unit 5, and discharge IGBT and discharge resistance are formed direct-current discharge unit 4, and by-pass unit 6 is placed with inversion unit nearby.The direction in air channel is along the rectifier bridge direction, and is as shown in Figure 5.From structural configuration and electric seeing, very smooth, but there is very big problem in the angle from dispelling the heat.At first, input rectifying unit 2, direct-current discharge unit 4 or be operated in low frequency 50Hz, or short-term operation, caloric value is seldom; And inverter bridge 1 is operated in high frequency, high pressure, current state with the inversion unit that inverter bridge 2 constitutes, and caloric value is very big.As the result who schemes to arrange causes in order to satisfy the demand of the big heat dissipation capacity of inversion unit, and has to adopt big and heavy radiator, increased the volume and weight of chain link power cell, increased cost simultaneously.And, because the radiator integral wind path is long, can have influence on the radiating effect of inversion unit.
To above-mentioned two shortcomings of existing high voltage converter chain link power cell, the utility model patent has proposed solution, thereby has formed new high voltage converter chain link power cell modes of emplacement.
The utility model content:
To the deficiency of above-mentioned technology, the utility model provides a kind of high voltage converter chain link power cell device, solved to exchange the difficult problem that system maintenance and debugging after the power down do not have chain link control power supply, and thermal diffusivity is strong.
A kind of split type high voltage converter chain link power cell device that the utility model provides, said device comprise that the interchange input protection unit 1, rectification unit 2, the direct current that connect successively support the major loop of the chain link power cell of capacitor cell 3, direct-current discharge unit 4, inversion unit 5 and by-pass unit 6 formations; The control loop of the chain link power cell of getting ability unit 7, chain link control unit 8 and drive protecting unit formation that connects successively; Said major loop is connected through optical fiber with said control loop; Its improvements are,
With said device separated into two parts: a part by direct current support capacitor cell 3 half the, exchange input protection unit 1 and rectification unit 2 constitutes, be placed on the radiator I; Another part by said direct current support capacitor cell 3 second half, direct-current discharge unit 4, inversion unit 5 and by-pass unit 6, get can unit 7 and chain link control unit 8 constitute, be placed on the radiator II; Connect through dc bus between said two parts.
The device of first preferred version that the utility model provides, its improvements are, said direct current are supported the two ends of capacitor cell 3 and get and can be connected with said chain link controller 8 unit 7 with another successively.
The device of second preferred version that the utility model provides, its improvements are that said interchange input protection unit 1 comprises threephase switch.
The device of the 3rd preferred version that the utility model provides, its improvements are that said rectification unit 2 comprises rectifier bridge, and said rectifier bridge is made up of high-voltage diode.
The device of the 4th preferred version that the utility model provides, its improvements be, said direct current support capacitor cell 3 comprise series connection electric capacity and with each electric capacity parallel resistor.
The device of the 5th preferred version that the utility model provides, its improvements are that said direct-current discharge unit 4 comprises the IGBT and the discharge resistance of series connection.
The device of the 6th preferred version that the utility model provides; Its improvements are that said inversion unit 5 is the H bridge construction, and said H bridge construction comprises two brachium pontis; Each brachium pontis comprises two IGBT modules up and down, and each IGBT module constitutes by IGBT with the antiparallel diode of said IGBT.
The device of the 7th preferred version that the utility model provides, its improvements are that said getting can comprise transformer and AD/DC converter in unit 7.
The device of the 8th preferred version that the utility model provides, its improvements are that said another got and can be comprised the DC/DC converter in unit 7.
With the prior art ratio, the beneficial effect of the utility model is:
1. the utility model adopts direct current to get ability, makes chain link power inverting unit and not empty rectification unit decoupling zero;
2. the utility model has solved to exchange and has got and can take place under-voltage or during short time power down at system voltage, the risk of chain link control unit dead electricity;
3. the utility model direct current is got the existence of ability mode, has guaranteed the device whole reliability, even big falling takes place system voltage, also can not have influence on the power supply of control loop;
4. the utility model is greatly improved the heat-sinking capability of chain link power inverting unit through the split-type structural design; The two parts (not controlling rectification and controlled inversion) that split into according to the difference of caloric value; Because caloric value is different; So can select the radiator of different size, and need not carry out heat dissipation design, thereby reduce the weight and volume of radiator according to the caloric value of controlled inversion part.
5. the utility model makes chain link power inverting unit have very strong structure versatility through the split-type structural design, promptly is applicable to all H bridge application scenarios;
6. make the direct current line into by original interchange line between two power cells that the utility model splits; The connection that promptly originally needed exchanges the 3n (n is a number of modules) of input with long ac bus, has become 3n root short delivery stream bus or busbar and 2n root dc bus, and owing to the peak value of DC bus-bar voltage near ac bus voltage; So its electric current is less relatively; The line footpath also can reduce, and has reduced the volume and weight of device, has reduced manufacturing cost.
Description of drawings
The principle schematic of the chain link power cell that Fig. 1 provides for the utility model.
The high voltage converter schematic diagram that Fig. 2 provides for the utility model based on high voltage converter link units formation.
The interchange side-draw that Fig. 3 provides for the utility model can schematic diagram.
The direct current side-draw that Fig. 4 provides for the utility model can schematic diagram.
Fig. 5 arranges vertical view for the high voltage converter chain link power cell structure that the utility model provides.
The split type high voltage converter chain link power cell schematic diagram that Fig. 6 provides for the utility model.
The split type high voltage converter chain link power cell structure sketch map that Fig. 7 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done further to specify.
Present embodiment supports the output of capacitor cell 3 with direct current and can unit 7 be connected with chain link controller 8 in original control loop with getting with another successively.Present embodiment proposes to obtain the energy that institute's chain link controller needs from the dc energy storage unit 3 of chain link power cell.Because of there is big storage capacitor in DC side, can avoid the influence of voltage swells rapid drawdown to the power supply of chain link controller.Even when the complete power down of AC side, the energy of dc capacitor storage also is enough to keep the operate as normal of link units controller, has solved to exchange the difficult problem that system maintenance and debugging after the power down do not have chain link control power supply.
Direct current side-draw ability schematic diagram is as shown in Figure 4.After the conversion of high input voltage DC/DC converter, give the power supply of chain link control unit from the DC+ of direct current support capacitor cell 3, the high direct voltage of DC-output.Owing to made full use of the energy of dc energy storage unit 3 storages, thereby strengthened the reliability of chain link power cell.In view of current high voltage converter chain link power cell DC bus-bar voltage is many below the 1200V direct voltage, select the little electric current I GBT of 1700V series for use, adopt that both-end instead swashs, double-end normal shock or bridge type topology be easy to realize above-mentioned conversion.
As shown in Figure 6, for the heat dissipation design of optimization means, present embodiment is divided into two parts with high voltage converter chain link power cell.The principle one that present embodiment is divided is the difference of caloric value, and is basically very little like first's caloric value; Another then be with the power electronic device in the power cell according to controlled and uncontrollable the differentiation, all be the device that need not control like a part wherein.Wherein, do not control part and place with the high pressure phase shifting transformer nearby, controlled inversion part is placed separately; In addition, another points for attention of split design are: need a large amount of storage capacitors in the high voltage converter usually, when dividing, many storage capacitors are placed on do not control side as far as possible, purpose is to reduce the volume of controllable part.
A present embodiment part (this part is uncontrollable part) by direct current support capacitor cell (3) half the, exchange input protection unit (1) and rectification unit (2) formation; Be placed on the radiator I; Get and to be placed on upper side with chain link control unit 8 in unit 7, to reduce the width of chain link power cell; Another part (this part is a controllable part) by said direct current support capacitor cell (3) second half, direct-current discharge unit (4), inversion unit (5) and by-pass unit (6), getting can unit (7) and chain link control unit (8) formation, be placed on the radiator II; Radiator I is placed near the high pressure phase shifting transformer nearby, connects through dc bus between two parts.Modular structure after the split-type structural design is arranged as shown in Figure 7.As can be seen from Figure 7, through the chain link power cell is split, shorten greatly in the air channel of inversion module radiator portion.
Should be noted that at last: combine the foregoing description only explain the utility model technical scheme but not to its restriction.Under the those of ordinary skill in field be to be understood that: those skilled in the art can make amendment or are equal to replacement the embodiment of the utility model, but these modifications or change are all among the claim protection range that application is awaited the reply.
Claims (9)
1. split type high voltage converter chain link power cell device, said device comprise that the interchange input protection unit (1), rectification unit (2), the direct current that connect successively support the major loop of capacitor cell (3), direct-current discharge unit (4), inversion unit (5) and the chain link power cell of by-pass unit (6) formation; The control loop of the chain link power cell of getting ability unit (7), chain link control unit (8) and drive protecting unit formation that connects successively; Said major loop is connected through optical fiber with said control loop; It is characterized in that,
With said device separated into two parts: a part by direct current support capacitor cell (3) half the, exchange input protection unit (1) and rectification unit (2) formation, be placed on the radiator I; Another part by said direct current support capacitor cell (3) second half, direct-current discharge unit (4), inversion unit (5) and by-pass unit (6), getting can unit (7) and chain link control unit (8) formation, be placed on the radiator II; Connect through dc bus between said two parts.
2. device as claimed in claim 1 is characterized in that, said direct current is supported the two ends of capacitor cell (3) and gets and can be connected with said chain link controller (8) unit (7) with another successively.
3. device as claimed in claim 1 is characterized in that, said interchange input protection unit (1) comprises threephase switch.
4. device as claimed in claim 1 is characterized in that, said rectification unit (2) comprises rectifier bridge, and said rectifier bridge is made up of high-voltage diode.
5. device as claimed in claim 1 is characterized in that, said direct current support capacitor cell (3) comprise series connection electric capacity and with each electric capacity parallel resistor.
6. device as claimed in claim 1 is characterized in that, said direct-current discharge unit (4) comprises the IGBT and the discharge resistance of series connection.
7. device as claimed in claim 1; It is characterized in that said inversion unit (5) is the H bridge construction, said H bridge construction comprises two brachium pontis; Each brachium pontis comprises two IGBT modules up and down, and each IGBT module constitutes by IGBT with the antiparallel diode of said IGBT.
8. device as claimed in claim 1 is characterized in that, said getting can comprise transformer and AD/DC converter in unit (7).
9. device as claimed in claim 1 is characterized in that, said another got and can be comprised the DC/DC converter in unit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203824838U CN202309539U (en) | 2011-10-10 | 2011-10-10 | Split-type high voltage frequency converter chain link power unit device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203824838U CN202309539U (en) | 2011-10-10 | 2011-10-10 | Split-type high voltage frequency converter chain link power unit device |
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| CN202309539U true CN202309539U (en) | 2012-07-04 |
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| CN2011203824838U Expired - Lifetime CN202309539U (en) | 2011-10-10 | 2011-10-10 | Split-type high voltage frequency converter chain link power unit device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015041638A1 (en) * | 2013-09-18 | 2015-03-26 | Siemens Industry, Inc. | Fiber optic ring for bypass system in multi-cell power supply |
-
2011
- 2011-10-10 CN CN2011203824838U patent/CN202309539U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015041638A1 (en) * | 2013-09-18 | 2015-03-26 | Siemens Industry, Inc. | Fiber optic ring for bypass system in multi-cell power supply |
| CN105765836A (en) * | 2013-09-18 | 2016-07-13 | 西门子公司 | Fiber optic ring for bypass system in multi-cell power supply |
| US9875860B2 (en) | 2013-09-18 | 2018-01-23 | Siemens Aktiengesellschaft | Fiber optic ring for bypass system in multi-cell power supply |
| CN105765836B (en) * | 2013-09-18 | 2019-09-20 | 西门子公司 | Fibre optics ring for the bypath system in multi-cell electric power |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140325 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140325 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140325 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |