CN202261005U - Pre-charging circuit for five-level current transformer - Google Patents
Pre-charging circuit for five-level current transformer Download PDFInfo
- Publication number
- CN202261005U CN202261005U CN2011204085299U CN201120408529U CN202261005U CN 202261005 U CN202261005 U CN 202261005U CN 2011204085299 U CN2011204085299 U CN 2011204085299U CN 201120408529 U CN201120408529 U CN 201120408529U CN 202261005 U CN202261005 U CN 202261005U
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4837—Flying capacitor converters
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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
- H02M1/0095—Hybrid converter topologies, e.g. NPC mixed with flying capacitor, thyristor converter mixed with MMC or charge pump mixed with buck
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The utility model provides a pre-charging circuit applicable to an active neutral point clamped (ANPC) five-level current transformer topological structure, which solves the overcurrent problem caused by direct charging of the current transformer topological structure and is used for charging the voltage of a capacitor to a working value. To limit the pre-charging current of the capacitor, a current limiting resistor is connected with a direct current link in series; in order to charge two voltage stabilizing capacitors in the direct current link to working voltage values, a voltage division circuit, which is formed by connecting two same resistors with very large resistances in series, is connected with the direct current link in parallel; and in order to charge the voltage of a voltage stabilizing capacitor of a three-phase leg to a working voltage value, a voltage division voltage, which is formed by connecting two resistors with threefold relation in resistance and a normal closed contactor in series, is connected with the direct current link in parallel, and the voltage stabilizing capacitors of the three-phase legs are connected with the resistor with smaller resistance in parallel at the same time.
Description
Technical field
The utility model relates to the pre-charge circuit of voltage regulation capacitor in a kind of five level current transformer main circuit topological structures; Particularly a kind of can prevent that current transformer from starting the time voltage regulation capacitor charging current excessive, and make the capacitor terminal voltage reach the pre-charge circuit of its operating voltage.
Background technology
At present, known five level current transformer topological structures have multiple, and the pre-charge circuit of the utility model design is applicable to active mid point clamper type (ANPC) converter topologies.This topological structure has advantages such as suitable high-voltage large-capacity motor drags, the high voltage power transmission occasion, and the waveform harmonics content that inversion goes out is few, and switching frequency is low.But voltage reached certain value and keeps stable when the necessary condition of this current transformer operate as normal was the voltage regulation capacitor work that needs in the topological structure, and this just needs current transformer before startup, voltage regulation capacitor to be carried out precharge.
But when the capacitor initial voltage is zero, directly it is charged, capacitor is equivalent to short circuit, and charging current is excessive, can cause the damage of capacitor and switching device, and this carries out precharge with regard to needing special pre-charge circuit to capacitor.The present domestic pre-charge circuit design of not seeing active mid point clamper type (ANPC) five level current transformer topological structures as yet.
Summary of the invention
The utility model purpose is that a kind of pre-charge circuit that is applicable to active mid point clamper type (ANPC) five level current transformer topological structures will be provided; Solve the overcurrent problem that this converter topologies is directly charged and caused, and condenser voltage is charged to operational voltage value.
It is following that the utility model solves the technical scheme that its technical problem adopted: active mid point clamper type (ANPC) current transformer main circuit topological structure is made up of rectification link, DC link, inversion link three parts.The rectification link is realized by the uncontrollable diode rectifier circuit of three-phase, joins with DC link; DC link is made up of the voltage regulation capacitor of two series connection, is parallel to the three-phase inversion link, for the inversion link provides stable level voltage value; The inversion link is made up of three brachium pontis; Every phase brachium pontis is formed by 12 insulated gate bipolar transistor (IGBT) and voltage regulation capacitors that carry fly-wheel diode; Connect according to active mid point clamper type topological structure; And open insulated gate bipolar transistor (IGBT) with specific triggering mode, produce the level of five different amplitudes.The insulated gate bipolar transistor of every phase brachium pontis (IGBT) connected mode specifically describes: the series connection back is parallelly connected with DC link successively for first and second of this phase, nine, ten, 11,12, seven, eight insulated gate bipolar transistors (IGBT) order; The outlet of drawing this phase at the tie point of the tenth, 11 insulated gate bipolar transistors (IGBT) links to each other with motor; Third and fourth, five, six insulated gate bipolar transistors (IGBT) orders successively series connection back and the 9th, ten, 11,12 insulated gate bipolar transistors (IGBT) be connected into whole parallelly connected; Draw connect with DC link two tie point of voltage regulation capacitor of mid point clamper line at the tie point of fourth, fifth insulated gate bipolar transistor (IGBT) and join, it is whole parallelly connected that the voltage regulation capacitor of this phase and the tenth, 11 insulated gate bipolar transistors (IGBT) are connected into.Other two phases brachium pontis is identical with said structure.Two of DC link series connection voltage regulation capacitors respectively bear 1/2nd dc tache voltage value during operate as normal, and institute is shared for the three-phase brachium pontis, and every phase voltage regulation capacitor separately all bears 1/4th dc tache voltage value.
Be the pre-charge current of restriction capacitor, the current-limiting resistance of between rectification link and DC link, having connected, and with normally open contactor with the current-limiting resistance parallel connection; For two voltage regulation capacitor voltages that make DC link are charged to operational voltage value, in DC link parallel connection the bleeder circuit that is in series by two very big and identical resistance of resistance, two voltage regulation capacitors are connected in parallel on respectively on one of them divider resistance; For making three-phase brachium pontis voltage regulation capacitor voltage separately be charged to operational voltage value, in the DC link parallel connection by two divider resistances and the bleeder circuit that normally closed contactor is in series, resistance is three times a relation between these two divider resistances; The first phase voltage regulation capacitor positive pole is connected on the high-pressure side of the little divider resistance of resistance through normally closed contactor; Negative pole is connected on the low-pressure end of the little divider resistance of resistance through normally closed contactor; The second phase voltage regulation capacitor positive pole is connected on first phase voltage regulation capacitor positive pole through normally closed contactor; Negative pole is connected on the first phase voltage regulation capacitor negative pole through normally closed contactor; Third phase voltage regulation capacitor positive pole is connected on second phase voltage regulation capacitor positive pole through normally closed contactor, and negative pole is connected on the second phase voltage regulation capacitor negative pole through normally closed contactor.The beneficial effect of the utility model is: realized restriction through reliable hardware circuit, and voltage regulation capacitor charged to the required state of work voltage regulation capacitor pre-charge current size, and simple in structure, reached the purpose of the utility model.
Description of drawings
Fig. 1 is active mid point clamper type (ANPC) the converter topologies figure that the utility model is suitable for.
Fig. 2 is to use the utility model to carry out precharge active mid point clamper type (ANPC) converter topologies figure.
Among Fig. 2: D1～D6 is uncontrollable rectifier diode, and Sa1～Sa12 is 12 insulated gate bipolar transistors (IGBT) of a phase brachium pontis, and Sb1～Sb12 is 12 insulated gate bipolar transistors (IGBT) of b phase brachium pontis; Sc1～Sc12 is 12 insulated gate bipolar transistors (IGBT) of c phase brachium pontis, and R1 is a current-limiting resistance, and R2～R5 is a divider resistance; C1～C5 is a voltage regulation capacitor; KA1 is a normally open contactor, and KA2～KA8 is a normally closed contactor, and M1 is a three phase electric machine.
Embodiment
In Fig. 1, active mid point clamper type (ANPC) current transformer main circuit topological structure is made up of rectification link, DC link, inversion link three parts.(realize, join with DC link by the rectification circuit of D1～D6) form by the uncontrollable diode of three-phase for the rectification link; DC link is made up of the voltage regulation capacitor (C1, C2) of two series connection, is parallel to the bad joint of three-phase inversion, for the inversion link provides stable level voltage value; The inversion link is by three brachium pontis (a phase brachium pontis; B phase brachium pontis; C phase brachium pontis) form, every phase brachium pontis is formed by 12 insulated gate bipolar transistor (IGBT) and voltage regulation capacitors that carry fly-wheel diode, connects according to active mid point clamper type topological structure; And open insulated gate bipolar transistor (IGBT) with specific triggering mode, produce the level of five different amplitudes.The insulated gate bipolar transistor of every phase brachium pontis (IGBT) connected mode specifically describes: eight insulated gate bipolar transistors (Sa1, Sa2, Sa9; Sa10, Sa11, Sa12; Sa7, Sa8) the series connection back is parallelly connected with DC link successively for order, draws a outlet mutually at insulated gate bipolar transistor (Sa10) and insulated gate bipolar transistor (Sa11) tie point and links to each other with motor (M1); Insulated gate bipolar transistor (Sa3, Sa4, Sa5; Sa6) order is connected afterwards and insulated gate bipolar transistor (Sa9, Sa10, Sa11 successively; Sa12) the whole parallel connection that is connected into; Draw connect with DC link two tie point of voltage regulation capacitor (C1, C2) of mid point clamper line at insulated gate bipolar transistor (Sa4) and insulated gate bipolar transistor (Sa5) tie point and join the voltage regulation capacitor of a phase (C1) and insulated gate bipolar transistor (Sa10, the whole parallel connection that Sa11) is connected into.Other two phases brachium pontis is identical with a phase said structure.Two of DC link series connection voltage regulation capacitors (C1, C2) respectively bear 1/2nd dc tache voltage value during operate as normal, and institute is shared for the three-phase brachium pontis, and every phase voltage regulation capacitor (C3, C4, C5) separately all bears 1/4th dc tache voltage value.
In Fig. 2, be the pre-charge current of restriction capacitor, the current-limiting resistance (R1) of between rectification link and DC link, having connected, and with normally open contactor (KA1) with current-limiting resistance (R1) parallel connection; For two voltage regulation capacitors (C1, the C2) voltage that makes DC link is charged to operational voltage value; In DC link parallel connection the bleeder circuit that is in series by two very big and identical resistance (R2, R3) of resistance; Wherein capacitor (C1) is parallelly connected with resistance (R2), and capacitor (C2) is parallelly connected with resistance (R3); For making three-phase brachium pontis voltage regulation capacitor (C3, C4, C5) voltage separately be charged to operational voltage value; In DC link parallel connection the bleeder circuit that is in series by two divider resistances (R4, R5) and a normally closed contactor (KA2), the resistance of resistance (R4) is three times of resistance (R5) resistance; With the anodal high-pressure side that is connected on divider resistance (R5) through normally closed contactor (KA3) of a phase voltage regulation capacitor (C3); Negative pole is connected on the low-pressure end of divider resistance (R5) through normally closed contactor (KA4); B phase voltage regulation capacitor (C4) positive pole is connected on a phase voltage regulation capacitor (C3) positive pole through normally closed contactor (KA5); Negative pole is connected on a phase voltage regulation capacitor (C3) negative pole through normally closed contactor (KA6); C phase voltage regulation capacitor (C5) positive pole is connected on b phase voltage regulation capacitor (C4) positive pole through normally closed contactor (KA7), and negative pole is connected on b phase voltage regulation capacitor (C4) negative pole through normally closed contactor (KA8).
Claims (3)
1. level current transformer pre-charge circuit is characterized in that: comprise current limliting and dividing potential drop two parts, restricted portion is made up of the current-limiting resistance of series connection, and the dividing potential drop part is made up of the bleeder circuits of two groups of parallel connections.
2. five level current transformer pre-charge circuits according to claim 1 is characterized in that: series limiting resistor between rectification link and DC link (R1), and with normally open contactor (KA1) with current-limiting resistance (R1) parallel connection.
3. five level current transformer pre-charge circuits according to claim 1; It is characterized in that: the bleeder circuit that is in series by two very big and identical resistance (R2, R3) of resistance in the DC link parallel connection; Capacitor (C1) is parallelly connected with resistance (R2); Capacitor (C2) is parallelly connected with resistance (R3); The bleeder circuit that is in series by two divider resistances (R4, R5) and a normally closed contactor (KA2) in the DC link parallel connection; The resistance value of resistance (R4) is three times of resistance (R5), and a phase voltage regulation capacitor (C3) is anodal to be connected on the high-pressure side of divider resistance (R5) through normally closed contactor (KA3), and negative pole is connected on the low-pressure end of divider resistance (R5) through normally closed contactor (KA4); B phase voltage regulation capacitor (C4) is anodal to be connected on a phase voltage regulation capacitor (C3) positive pole through normally closed contactor (KA5); Negative pole is connected on a phase voltage regulation capacitor (C3) negative pole through normally closed contactor (KA6), and c phase voltage regulation capacitor (C5) is anodal to be connected on b phase voltage regulation capacitor (C4) positive pole through normally closed contactor (KA7), and negative pole is connected on b phase voltage regulation capacitor (C4) negative pole through normally closed contactor (KA8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204085299U CN202261005U (en) | 2011-10-18 | 2011-10-18 | Pre-charging circuit for five-level current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204085299U CN202261005U (en) | 2011-10-18 | 2011-10-18 | Pre-charging circuit for five-level current transformer |
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| Publication Number | Publication Date |
|---|---|
| CN202261005U true CN202261005U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204085299U Expired - Fee Related CN202261005U (en) | 2011-10-18 | 2011-10-18 | Pre-charging circuit for five-level current transformer |
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| CN (1) | CN202261005U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311936A (en) * | 2013-06-28 | 2013-09-18 | 江苏国源电气有限公司 | Control method for 3300V five-level anti-explosion reactive power compensation device |
| CN106169884A (en) * | 2016-06-30 | 2016-11-30 | 阳光电源股份有限公司 | The precharge control method of five-level active neutral-point-clamped type inverter and device |
| US9537416B2 (en) | 2014-11-28 | 2017-01-03 | General Electric Company | System and method for operating power converters |
| CN106301046A (en) * | 2016-08-26 | 2017-01-04 | 阳光电源股份有限公司 | A kind of multi-electrical level inverter and flying capacitor pre-charge circuit thereof |
| CN106559004A (en) * | 2015-09-29 | 2017-04-05 | 华为技术有限公司 | Multi-electrical level inverter |
| CN107070277A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter AC charging soft starting circuit and method |
| CN107070276A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter DC side charging soft starting circuit and method |
| CN109921676A (en) * | 2019-03-04 | 2019-06-21 | 易事特集团股份有限公司 | Converter topology unit and converter device |
| WO2019210784A1 (en) * | 2018-05-03 | 2019-11-07 | 华为技术有限公司 | Multi-level inverter |
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2011
- 2011-10-18 CN CN2011204085299U patent/CN202261005U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311936B (en) * | 2013-06-28 | 2016-04-06 | 江苏国源电气有限公司 | A kind of 3300V five level anti-explosion reactive compensation device control method |
| CN103311936A (en) * | 2013-06-28 | 2013-09-18 | 江苏国源电气有限公司 | Control method for 3300V five-level anti-explosion reactive power compensation device |
| US9537416B2 (en) | 2014-11-28 | 2017-01-03 | General Electric Company | System and method for operating power converters |
| EP3343749A4 (en) * | 2015-09-29 | 2018-08-22 | Huawei Technologies Co., Ltd. | Multi-level inverter |
| CN106559004A (en) * | 2015-09-29 | 2017-04-05 | 华为技术有限公司 | Multi-electrical level inverter |
| US10177683B2 (en) | 2015-09-29 | 2019-01-08 | Huawei Technologies Co., Ltd. | Multi-level inverter |
| CN106169884A (en) * | 2016-06-30 | 2016-11-30 | 阳光电源股份有限公司 | The precharge control method of five-level active neutral-point-clamped type inverter and device |
| CN106169884B (en) * | 2016-06-30 | 2019-02-01 | 阳光电源股份有限公司 | The precharge control method and device of five-level active neutral-point-clamped type inverter |
| CN106301046A (en) * | 2016-08-26 | 2017-01-04 | 阳光电源股份有限公司 | A kind of multi-electrical level inverter and flying capacitor pre-charge circuit thereof |
| CN106301046B (en) * | 2016-08-26 | 2018-12-28 | 阳光电源股份有限公司 | A kind of multi-electrical level inverter and its flying capacitor pre-charge circuit |
| CN107070276A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter DC side charging soft starting circuit and method |
| CN107070277A (en) * | 2017-04-20 | 2017-08-18 | 上海交通大学 | Active neutral point clamp Five-level converter AC charging soft starting circuit and method |
| CN107070276B (en) * | 2017-04-20 | 2019-04-12 | 上海交通大学 | Active neutral point clamp Five-level converter DC side charging soft starting circuit and method |
| CN107070277B (en) * | 2017-04-20 | 2019-06-07 | 上海交通大学 | Active neutral point clamp Five-level converter exchange side charging soft starting circuit and method |
| WO2019210784A1 (en) * | 2018-05-03 | 2019-11-07 | 华为技术有限公司 | Multi-level inverter |
| US11201564B2 (en) | 2018-05-03 | 2021-12-14 | Huawei Technologies Co., Ltd. | Multi-level inverter including at least four switches and at least four resistors |
| EP3767815B1 (en) * | 2018-05-03 | 2023-07-12 | Huawei Digital Power Technologies Co., Ltd. | Multi-level inverter |
| CN109921676A (en) * | 2019-03-04 | 2019-06-21 | 易事特集团股份有限公司 | Converter topology unit and converter device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20141018 |
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| EXPY | Termination of patent right or utility model |