CN206628973U - A kind of low-voltage transverter soft starting circuit of small dash current - Google Patents
A kind of low-voltage transverter soft starting circuit of small dash current Download PDFInfo
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- CN206628973U CN206628973U CN201720162397.3U CN201720162397U CN206628973U CN 206628973 U CN206628973 U CN 206628973U CN 201720162397 U CN201720162397 U CN 201720162397U CN 206628973 U CN206628973 U CN 206628973U
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- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of low-voltage transverter soft starting circuit of small dash current,By the D.C. resistance R of a DC side,IGBT module T,Monopolar D. C breaker KM is formed,The circuit is by being serially connected between dc bus positive pole DC+ and DC capacitor C,Form small dash current soft start loop,Compared with the currently used level converter soft starting circuit of three-phase two,Element is greatly reduced,Reduce manufacturing cost,It is easier to application,And circuit structure is simple,Improve the operational reliability of whole device,In addition,The big minor adjustment of charging current can be realized by adjusting the dutycycle of IGBT module T trigger signals,Both controllability of the device in charging process had been enhanced,Also device issuable dash current in DC side DC capacitor C charging processes is further reduced,While protection device self-operating is safe,Also mitigate influence of the device to system in start-up course.
Description
Technical field
The low pressure transverter applied topology technical field based on Power Electronic Technique is the utility model is related to, it is especially a kind of
The low-voltage transverter soft starting circuit of small dash current.
Background technology
In the last few years, with the rapid development of Power Electronic Technique, in low voltage three-phase distribution system, the level of three-phase two electricity
Potential source type transverter topology obtains as circuit topology the most typical is applied in the application scenario of various Power Electronic Technique
Most commonly used application, and such power electronic equipment based on the power level voltage source type transverter of three-phase two, in normal work
It is required for entering line precharge to the DC capacitor of device by AC system before, treats that DC bus capacitor charges to rated DC current
After pressure, device can just start normal inversion work, realize all kinds of power electronic equipments function set in advance, currently used
Method is in the three-phase alternating current outlet of device and every soft start resistance of mutually connecting, each resistance both ends between system power supply
A by-pass switch in parallel, the soft starting circuit of constituent apparatus, but soft starting circuit scheme is realized, at least needed on its circuit
Three soft start resistance, a three-phase alternating current breaker realize that this virtually adds the manufacture of device as by-pass switch
Cost, it have impact on the large-scale promotion of device；Further, since the resistance of soft start resistance needs to consider device access system
When caused dash current and AC system to charging interval of DC capacitor this to contradiction, rolled between both
Middle selection, therefore started using the program, the meeting being still difficult to avoid that produces certain dash current, to AC system and
The device of device itself produces certain impact, such as Fig. 2.
Utility model content
The purpose of this utility model is the low-voltage transverter soft starting circuit for providing a kind of small dash current, possesses knot
Structure is simple, reliability is high, and has smaller dash current, suitable for the spy of the three-phase transverter soft starting circuit of low-voltage network
Point, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides following technical scheme：A kind of low-voltage change of current of small dash current
Device soft starting circuit, including soft starting circuit, dc bus positive pole DC+, DC capacitor C, current-limiting resistance R, IGBT module T and list
Pole dc circuit breaker KM, the soft starting circuit are arranged between dc bus positive pole DC+ and DC capacitor C, soft starting circuit
Be serially connected between dc bus positive pole DC+ and DC capacitor C, the soft starting circuit include current-limiting resistance R, IGBT module T and
Tri- elements of monopolar D. C breaker KM, current-limiting resistance R and IGBT module T are connected in series, and current-limiting resistance R and IGBT module T are equal
It is connected in parallel with monopolar D. C breaker KM, monopolar D. C breaker KM and current-limiting resistance R public connecting end are arranged to soft and opened
The input of dynamic circuit, monopolar D. C breaker KM and IGBT module T public connecting end are arranged to the output of soft starting circuit
End, the output end of the soft starting circuit are connected with DC capacitor C.
As further program of the utility model：The soft starting circuit is installed on the level of low-voltage transverter three-phase two
The DC side of transverter, the both ends of DC capacitor C and dc bus are serially connected with, the input and dc bus of soft starting circuit are just
Pole DC+ is connected, and the output end of soft starting circuit is connected with DC capacitor C positive pole.
As further program of the utility model：The soft starting circuit is in charging process, by adjusting IGBT moulds
The dutycycle of block T trigger pulses, make-and-break times of the control IGBT module T in charging process.
As further program of the utility model：The soft starting circuit is suitable for low-voltage distribution system with three-phase two
Various power electronic equipments of the level converter as application circuit.
As further program of the utility model：IGBT module T in the soft starting circuit is by anti-paralleled diode
Common encapsulation.
Compared with prior art, the utility model beneficial effect：
The low-voltage transverter soft starting circuit of this small dash current, soft starting circuit are installed on low-voltage transverter three-phase
The DC side of two level converters, it is serially connected with the both ends of DC capacitor and dc bus, the input and direct current of soft starting circuit
Bus positive pole DC+ is connected, and the output end of soft starting circuit is connected with DC capacitor positive pole, soft starting circuit include current-limiting resistance R,
Tri- elements of IGBT module T and monopolar D. C breaker KM, current-limiting resistance R and IGBT module T are connected in series, current-limiting resistance R and
IGBT module T is connected in parallel with monopolar D. C breaker KM, and soft starting circuit is in charging process, by adjusting IGBT module
The dutycycle of T trigger pulses, make-and-break times of the control IGBT module T in charging process, enhances device in charging process
Controllability, device issuable dash current in DC side DC capacitor C charging processes is also further reduced, is being protected
While device self-operating is safe, influence of the device to system in start-up course is also mitigated, is connected in soft starting circuit
Current-limiting resistance R limit the rate of rise of voltage and current in charging process, realize to DC capacitor C and IGBT module T
Protection so that the operational reliability of device further enhances.
Brief description of the drawings
Fig. 1 is small dash current low-voltage transverter soft starting circuit figure of the present utility model；
Fig. 2 is conventional transverter soft starting circuit of the present utility model.
In figure：1- soft starting circuits.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Refer to Fig. 1-2, in the utility model embodiment, a kind of low-voltage transverter soft start electricity of small dash current
Road, including soft starting circuit 1, dc bus positive pole DC+, DC capacitor C, current-limiting resistance R, IGBT module T and monopolar D. C break
Road device KM, soft starting circuit 1 are arranged between dc bus positive pole DC+ and DC capacitor C, and soft starting circuit 1 is installed on low electricity
The DC side of the level converter of transverter three-phase two is pressed, is serially connected with DC capacitor C and dc bus positive pole DC+ both ends, soft start
The input of circuit 1 is connected with dc bus positive pole DC+, and the output end of soft starting circuit 1 is connected with DC capacitor C positive poles, soft
Start-up circuit 1 is serially connected between dc bus positive pole DC+ and DC capacitor C, and soft starting circuit 1 includes current-limiting resistance R, IGBT mould
Tri- elements of block T and monopolar D. C breaker KM, the IGBT module T in soft starting circuit 1 are encapsulated jointly by anti-paralleled diode,
Current-limiting resistance R and IGBT module T are connected in series, current-limiting resistance R and IGBT module T companies in parallel with monopolar D. C breaker KM
Connect, the inside of soft starting circuit 1 composition component greatly reduces, and reduces manufacturing cost, it is easier to application, circuit structure letter
It is single, the operational reliability of whole device is improved, introduces the controllability that IGBT module T improves whole device, soft starting circuit 1 exists
In charging process, by adjusting the dutycycle of IGBT module T trigger pulses, break-makes of the control IGBT module T in charging process
Time, controllability of the device in charging process is enhanced, also further reduce device in DC side DC capacitor C charging processes
In issuable dash current, while protection device self-operating is safe, it is right in start-up course to also mitigate device
The influence of system, the current-limiting resistance R to connect in soft starting circuit 1 limit the rate of rise of voltage and current in charging process,
Realize the protection to DC capacitor C and IGBT module T so that the operational reliability of device further enhances, and monopolar D. C breaks
Road device KM and current-limiting resistance R public connecting end is arranged to the input of soft starting circuit 1, monopolar D. C breaker KM and IGBT
Module T public connecting end is arranged to the output end of soft starting circuit 1, and output end and the DC capacitor C of soft starting circuit 1 connect
Connect, various electric power electricity of the soft starting circuit 1 suitable for low-voltage distribution system using the level converter of three-phase two as application circuit
Sub-device, before the level converter of three-phase two accesses three-phase alternating current system, monopolar D. C breaker KM is disconnected, and IGBT module T is in
Blocking, after the level converter incoming transport system of three-phase two, monopolar D. C breaker KM is still remained off, IGBT
Module T by regulation input the dutycycle of pwm pulse to adjust the size of charging current, and reduction DC capacitor C charges institute's band
The dash current come, the reliability of transverter overall operation is improved, after DC capacitor C voltage is charged to setting voltage, IGBT
Module T lockings, monopolar D. C breaker KM closures bypass charging paths, so as to complete the soft start-up process of transverter.
In summary：The low-voltage transverter soft starting circuit of this small dash current, soft starting circuit 1 are installed on low-voltage
The DC side of the level converter of transverter three-phase two, is serially connected with the both ends of DC capacitor and dc bus, soft starting circuit 1 it is defeated
Enter end with dc bus positive pole DC+ to be connected, the output end of soft starting circuit 1 is connected with DC capacitor positive pole, in soft starting circuit 1
R containing current-limiting resistance, IGBT module T and tri- elements of monopolar D. C breaker KM, current-limiting resistance R and IGBT module T are connected in series,
Current-limiting resistance R and IGBT module T is connected in parallel with monopolar D. C breaker KM, monopolar D. C breaker KM and current-limiting resistance R
Public connecting end be arranged to the input of soft starting circuit 1, soft starting circuit 1 is in charging process, by adjusting IGBT moulds
The dutycycle of block T trigger pulses, make-and-break times of the control IGBT module T in charging process, enhances device in charging process
Controllability, also further reduce device issuable dash current in DC side DC capacitor C charging processes, protecting
While protection unit self-operating is safe, influence of the device to system in start-up course is also mitigated, is gone here and there in soft starting circuit 1
The current-limiting resistance R of connection limits the rate of rise of voltage and current in charging process, realizes to DC capacitor C and IGBT module
T protection so that the operational reliability of device further enhances.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (5)
1. a kind of low-voltage transverter soft starting circuit of small dash current, including soft starting circuit（1）, dc bus positive pole DC
+, DC capacitor C, current-limiting resistance R, IGBT module T and monopolar D. C breaker KM, it is characterised in that：The soft starting circuit
（1）It is arranged between dc bus positive pole DC+ and DC capacitor C, soft starting circuit（1）Be serially connected with dc bus positive pole DC+ and
Between DC capacitor C, the soft starting circuit（1）Include current-limiting resistance R, IGBT module T and monopolar D. C breaker KM tri-
Element, current-limiting resistance R and IGBT module T are connected in series, current-limiting resistance R and IGBT module T with monopolar D. C breaker KM simultaneously
Connection connection, monopolar D. C breaker KM and current-limiting resistance R public connecting end are arranged to soft starting circuit（1）Input, it is single
Pole dc circuit breaker KM and IGBT module T public connecting end is arranged to soft starting circuit（1）Output end, soft start electricity
Road（1）Output end be connected with DC capacitor C.
A kind of 2. low-voltage transverter soft starting circuit of small dash current according to claim 1, it is characterised in that：Institute
State soft starting circuit（1）The DC side of the level converter of low-voltage transverter three-phase two is installed on, is serially connected with DC capacitor and straight
Flow the both ends of bus, soft starting circuit（1）Input be connected with dc bus positive pole DC+, soft starting circuit（1）Output end
It is connected with DC capacitor C positive pole.
A kind of 3. low-voltage transverter soft starting circuit of small dash current according to claim 1, it is characterised in that：Institute
State soft starting circuit（1）In charging process, by adjusting the dutycycle of IGBT module T trigger pulses, control IGBT module T exists
Make-and-break time in charging process.
A kind of 4. low-voltage transverter soft starting circuit of small dash current according to claim 1, it is characterised in that：Institute
State soft starting circuit（1）Various electric power electricity suitable for low-voltage distribution system using the level converter of three-phase two as application circuit
Sub-device.
A kind of 5. low-voltage transverter soft starting circuit of small dash current according to claim 1, it is characterised in that：Institute
State soft starting circuit（1）In IGBT module T encapsulated jointly by anti-paralleled diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720162397.3U CN206628973U (en) | 2017-02-23 | 2017-02-23 | A kind of low-voltage transverter soft starting circuit of small dash current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720162397.3U CN206628973U (en) | 2017-02-23 | 2017-02-23 | A kind of low-voltage transverter soft starting circuit of small dash current |
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| Publication Number | Publication Date |
|---|---|
| CN206628973U true CN206628973U (en) | 2017-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720162397.3U Expired - Fee Related CN206628973U (en) | 2017-02-23 | 2017-02-23 | A kind of low-voltage transverter soft starting circuit of small dash current |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512409A (en) * | 2018-05-31 | 2018-09-07 | 西南交通大学 | A kind of highpowerpulse load power source soft starting device and start method |
| CN108880277A (en) * | 2018-07-18 | 2018-11-23 | 南京南瑞继保电气有限公司 | A kind of voltage source converter having ice-melt function concurrently and control method |
| CN109861266A (en) * | 2019-01-15 | 2019-06-07 | 南京工程学院 | The flexible starting method of the flexible HVDC transmission system of the access containing extensive new energy |
| US11777402B2 (en) | 2021-06-25 | 2023-10-03 | Delta Electronics (Shanghai) Co., Ltd. | Precharge system and method |
-
2017
- 2017-02-23 CN CN201720162397.3U patent/CN206628973U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512409A (en) * | 2018-05-31 | 2018-09-07 | 西南交通大学 | A kind of highpowerpulse load power source soft starting device and start method |
| CN108880277A (en) * | 2018-07-18 | 2018-11-23 | 南京南瑞继保电气有限公司 | A kind of voltage source converter having ice-melt function concurrently and control method |
| CN109861266A (en) * | 2019-01-15 | 2019-06-07 | 南京工程学院 | The flexible starting method of the flexible HVDC transmission system of the access containing extensive new energy |
| CN109861266B (en) * | 2019-01-15 | 2023-02-10 | 南京工程学院 | Flexible starting method of flexible direct current transmission system with large-scale new energy access |
| US11777402B2 (en) | 2021-06-25 | 2023-10-03 | Delta Electronics (Shanghai) Co., Ltd. | Precharge system and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171110 Termination date: 20180223 |