CN203086368U - Modular multi-level three-phase voltage source converter - Google Patents
Modular multi-level three-phase voltage source converter Download PDFInfo
- Publication number
- CN203086368U CN203086368U CN2012207307106U CN201220730710U CN203086368U CN 203086368 U CN203086368 U CN 203086368U CN 2012207307106 U CN2012207307106 U CN 2012207307106U CN 201220730710 U CN201220730710 U CN 201220730710U CN 203086368 U CN203086368 U CN 203086368U
- Authority
- CN
- China
- Prior art keywords
- group
- semiconductor switch
- voltage source
- phase voltage
- fly
- 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.)
- Withdrawn - After Issue
Links
Images
Classifications
-
- 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
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The utility model relates to a modular multi-level three-phase voltage source converter and belongs to the field of electrical automation devices. The modular multi-level three-phase voltage source converter comprises six current converting arms and six filter reactors. Three positive ends of the three current converting arms of a first group serve as a direct-current positive end of the converter after being connected together, three negative ends of the three current converting arms of the first group are connected to one ends of the three filter reactors of the first group respectively, and the other ends of the three filter reactors of the first group serve as three-phase alternating-current phase wire ends of the converter respectively. Three negative ends of the three current converting arms of a second group serve as a direct-current negative end of the converter after being connected together, positive ends of the three current converting arms of the second group are connected to one ends of the three filter reactors of the second group respectively, and the other ends of the three filter reactors of the second group are connected to the three-phase alternating-current phase wire ends of the converter respectively. According to the modular multi-level three-phase voltage source converter, multi-level high-voltage current converting application, back-to-back connection of direct-current sides of two converters and protection of the direct-current sides in case of short circuit can be achieved.
Description
Technical field
The utility model relates to a kind of modular multilevel three-phase voltage source current transformer, belongs to the electric automatization apparatus field.
Background technology
Voltage source converter is widely used in RHVC, STATCOM or the like.When high-voltage applications, generally all the required power semiconductor device is connected and is realized, or adopts many level current transformers, as the chain type current transformer.The shortcoming of chain type current transformer is that a plurality of independently DC power supply are arranged, and makes its DC side that can't realize two current transformers connect back-to-back, perhaps is applied to direct current transportation.
Existing modular multilevel voltage source converter can realize that the DC side of two current transformers connects back-to-back, but current transformer can't be realized effective protection during dc-side short-circuit.
Summary of the invention
The purpose of this utility model is to propose a kind of modular multilevel three-phase voltage source current transformer; change the structure of existing three-phase voltage source current transformer; protection when being short-circuited fault with the realization DC side realizes high-voltage applications, realizes that again two current transformer DC side connect back-to-back simultaneously.
The modular multilevel three-phase voltage source current transformer that the utility model proposes comprises first group of three convertor arm, second group of three convertor arm, first group of three filter reactor and second group of three filter reactor; Three positive terminals of described first group of three convertor arm connect together the direct-flow positive pole end of back as described modular multilevel three-phase voltage source current transformer, three negative pole ends of first group of three convertor arm are connected respectively to an end of first group of three filter reactor, and the other end of first group of three filter reactor is respectively as the three-phase alternating current phase line end of described modular multilevel three-phase voltage source current transformer; Three negative pole ends of second group of three convertor arm connect together the direct current negative pole end of back as described modular multilevel three-phase voltage source current transformer, three positive terminals of second group of three convertor arm are connected respectively to an end of second group of three filter reactor, and the other end of second group of three filter reactor is connected respectively to the three-phase alternating current phase line end of described modular multilevel three-phase voltage source current transformer.
In the above-mentioned modular multilevel three-phase voltage source current transformer, described convertor arm comprises a plurality of unsteady flow modules, and a plurality of unsteady flow modules adopt to be connected in series and form a positive terminal and a negative pole end.The unsteady flow module comprises first direct current capacitor, second direct current capacitor, first semiconductor switch, second semiconductor switch, the 3rd semiconductor switch, first fly-wheel diode, second fly-wheel diode, the 3rd fly-wheel diode, clamping diode, resistance capaciting absorpting circuit and grading resistor; The collector electrode of described first semiconductor switch, second semiconductor switch and the 3rd semiconductor switch is connected with described first fly-wheel diode, second fly-wheel diode and the negative electrode of the 3rd fly-wheel diode respectively, and the emitter of described first semiconductor switch, second semiconductor switch and the 3rd semiconductor switch is connected with described first fly-wheel diode, second fly-wheel diode and the anode of the 3rd fly-wheel diode respectively; The positive terminal of described first direct current capacitor is connected with the collector electrode of described first semiconductor switch; The negative pole end of described first direct current capacitor is connected with the negative electrode of described second direct current capacitor positive terminal and described clamp diode; The collector electrode of the emitter of described first semiconductor switch and second semiconductor switch is connected as the positive terminal of unsteady flow module, and the emitter of described second semiconductor switch is connected with the emitter of the 3rd semiconductor switch and the negative pole end of second direct current capacitor; The anode of described clamping diode is connected as the negative pole end of unsteady flow module with the described the 3rd semi-conductive collector electrode; Described resistance capaciting absorpting circuit and grading resistor are parallel to the collector and emitter of the 3rd semiconductor switch respectively.
The modular multilevel three-phase voltage source current transformer that the utility model proposes; its advantage is: the high pressure unsteady flow that can realize many level is used; the DC side of two current transformers can form back-to-back and connect, and can realize the protection of current transformer self when DC side is short-circuited fault.
Description of drawings
Fig. 1 is the circuit theory diagrams of modular multilevel three-phase voltage source current transformer of the present utility model.
Fig. 2 is the circuit theory diagrams of convertor arm in the modular multilevel three-phase voltage source current transformer shown in Figure 1.
Fig. 3 is the circuit theory diagrams of unsteady flow module in the convertor arm shown in Figure 2.
Among Fig. 1-Fig. 3, the 1st, convertor arm, the 2nd, filter reactor, the 3rd, the unsteady flow module, 4 is first direct current capacitor and second direct current capacitor, the 5th, semiconductor switch, the 6th, fly-wheel diode, the 7th, resistance capaciting absorpting circuit, the 8th, grading resistor, the 9th, clamping diode.
Embodiment
The modular multilevel three-phase voltage source current transformer that the utility model proposes comprises first group of three convertor arm 1, second group of three convertor arm, first group of three filter reactor 2 and second group of three filter reactor.Three positive terminals of first group of three convertor arm connect together the direct-flow positive pole end of back as described modular multilevel three-phase voltage source current transformer, three negative pole ends of first group of three convertor arm are connected respectively to an end of first group of three filter reactor, and the other end of first group of three filter reactor is respectively as the three-phase alternating current phase line end of described modular multilevel three-phase voltage source current transformer; Three negative pole ends of second group of three convertor arm connect together the direct current negative pole end of back as described modular multilevel three-phase voltage source current transformer, three positive terminals of second group of three convertor arm are connected respectively to an end of second group of three filter reactor, and the other end of second group of three filter reactor is connected respectively to the three-phase alternating current phase line end of described modular multilevel three-phase voltage source current transformer.
As shown in Figure 1, the three-phase voltage source current transformer comprises two groups of six convertor arms 1, two groups of six filter reactors 2.The positive terminal of first group of three convertor arm connects together the direct-flow positive pole end DC+ of back as the three-phase voltage source current transformer; The negative pole end of first group of three convertor arm is connected respectively to the end of first group of three filter reactor LA1, LB1, LC1, and the other end of LA1, LB1, LC1 is respectively as three-phase alternating current phase line end A, B, the C of three-phase voltage source current transformer.The negative pole end of second group of three convertor arm connects together the direct current negative pole end DC-of back as the three-phase voltage source current transformer; The positive terminal of second group of three convertor arm is connected respectively to the end of second group of three filter reactor LA2, LB2, LC2, and the other end of second group of three filter reactor is connected respectively to three-phase alternating current phase line end A, B, the C of three-phase voltage source current transformer.
As shown in Figure 2, each convertor arm comprises several unsteady flow modules 3, and all unsteady flow modules adopt and are connected in series (negative pole end that the positive terminal of a unsteady flow module is connected to another unsteady flow module), forms a positive terminal "+" and a negative pole end "-".
As shown in Figure 3, each unsteady flow module comprises the first direct current capacitor C1, the second direct current capacitor C2, the first semiconductor switch S1, the second semiconductor switch S2, the 3rd semiconductor switch S3, first sustained diode 1, second sustained diode 2, the 3rd sustained diode 3, clamping diode D4, resistance capaciting absorpting circuit 7 and grading resistor 8.The collector electrode of the first semiconductor switch S1, the second semiconductor switch S2 and the 3rd semiconductor switch S3 is connected with the negative electrode of first sustained diode 1, second sustained diode 2 and the 3rd sustained diode 3 respectively, and the emitter of the first semiconductor switch S1, the second semiconductor switch S2 and the 3rd semiconductor switch S3 is connected with the anode of first sustained diode 1, second sustained diode 2 and the 3rd sustained diode 3 respectively.The positive terminal of the first direct current capacitor C1 is connected with the collector electrode of the first semiconductor switch S1, and the negative pole end of the first direct current capacitor C1 is connected with the negative electrode of the second direct current capacitor C2 positive terminal and clamp diode D4; The collector electrode of the emitter of the first semiconductor switch S1 and the second semiconductor switch S2 is connected as the positive terminal "+" of unsteady flow module, and the emitter of the second semiconductor switch S2 is connected with the emitter of the 3rd semiconductor switch S3 and the negative pole end of the second direct current capacitor C2; The anode of clamping diode D4 is connected as the negative pole end "-" of unsteady flow module with the collector electrode of the 3rd semiconductor S3; Resistance capaciting absorpting circuit 7 is made up of resistance R S and capacitor C S, is connected in parallel on the collector and emitter of the 3rd semiconductor switch S3 after resistance R S and the capacitor C S series connection, and grading resistor RJ also is connected in parallel on the collector and emitter of the 3rd semiconductor switch S3.
Modular multilevel three-phase voltage source current transformer of the present utility model during operate as normal, applies the conducting gate electrode drive signals to the 3rd semiconductor switch S3 always, makes S3 be in conducting state always.When detecting the current transformer dc-side short-circuit fault; the first semiconductor switch S1 of all unsteady flow modules, the second semiconductor switch S2 and the 3rd semiconductor switch S3 locking are immediately turn-offed; short circuit current can descend rapidly, thereby effectively protects the semiconductor switch and the fly-wheel diode operate as normal of all unsteady flow modules.
The first semiconductor switch S1 in the utility model circuit, the second semiconductor switch S2 and the 3rd semiconductor switch S3, can use any turn-off semiconductor switch, S3 also can use phase controlled thyristors (controllable silicon) (the corresponding collector electrode of anode, the corresponding emitter of negative electrode).When S3 used phase controlled thyristors (controllable silicon), clamping diode can save, and during the locking of protection action S3 gate pulse, if its electric current is to flow to negative electrode from anode, then this electric current can be reduced to zero by nature after after a while.Any equivalent transformation circuit of being done based on the utility model circuit all belongs to protection range of the present utility model.
Claims (3)
1. modular multilevel three-phase voltage source current transformer, it is characterized in that this modular multilevel three-phase voltage source current transformer comprises first group of three convertor arm, second group of three convertor arm, first group of three filter reactor and second group of three filter reactor; Three positive terminals of described first group of three convertor arm connect together the direct-flow positive pole end of back as described modular multilevel three-phase voltage source current transformer, three negative pole ends of first group of three convertor arm are connected respectively to an end of first group of three filter reactor, and the other end of first group of three filter reactor is respectively as the three-phase alternating current phase line end of described modular multilevel three-phase voltage source current transformer; Three negative pole ends of second group of three convertor arm connect together the direct current negative pole end of back as described modular multilevel three-phase voltage source current transformer, three positive terminals of second group of three convertor arm are connected respectively to an end of second group of three filter reactor, and the other end of second group of three filter reactor is connected respectively to the three-phase alternating current phase line end of described modular multilevel three-phase voltage source current transformer.
2. modular multilevel three-phase voltage source current transformer as claimed in claim 1 is characterized in that, wherein said convertor arm comprises a plurality of unsteady flow modules, and a plurality of unsteady flow modules adopt to be connected in series and form a positive terminal and a negative pole end.
3. modular multilevel three-phase voltage source current transformer as claimed in claim 2, it is characterized in that wherein said unsteady flow module comprises first direct current capacitor, second direct current capacitor, first semiconductor switch, second semiconductor switch, the 3rd semiconductor switch, first fly-wheel diode, second fly-wheel diode, the 3rd fly-wheel diode, clamping diode, resistance capaciting absorpting circuit and grading resistor; The collector electrode of described first semiconductor switch, second semiconductor switch and the 3rd semiconductor switch is connected with described first fly-wheel diode, second fly-wheel diode and the negative electrode of the 3rd fly-wheel diode respectively, and the emitter of described first semiconductor switch, second semiconductor switch and the 3rd semiconductor switch is connected with described first fly-wheel diode, second fly-wheel diode and the anode of the 3rd fly-wheel diode respectively; The positive terminal of described first direct current capacitor is connected with the collector electrode of described first semiconductor switch; The negative pole end of described first direct current capacitor is connected with the negative electrode of described second direct current capacitor positive terminal and described clamp diode; The collector electrode of the emitter of described first semiconductor switch and second semiconductor switch is connected as the positive terminal of unsteady flow module, and the emitter of described second semiconductor switch is connected with the emitter of the 3rd semiconductor switch and the negative pole end of second direct current capacitor; The anode of described clamping diode is connected as the negative pole end of unsteady flow module with the described the 3rd semi-conductive collector electrode; Described resistance capaciting absorpting circuit and grading resistor are parallel to the collector and emitter of the 3rd semiconductor switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207307106U CN203086368U (en) | 2012-12-26 | 2012-12-26 | Modular multi-level three-phase voltage source converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207307106U CN203086368U (en) | 2012-12-26 | 2012-12-26 | Modular multi-level three-phase voltage source converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203086368U true CN203086368U (en) | 2013-07-24 |
Family
ID=48832170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207307106U Withdrawn - After Issue CN203086368U (en) | 2012-12-26 | 2012-12-26 | Modular multi-level three-phase voltage source converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203086368U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001520A (en) * | 2012-12-26 | 2013-03-27 | 清华大学 | Modularized multi-level three-phase voltage source converter |
| WO2017041428A1 (en) * | 2015-09-10 | 2017-03-16 | 南方电网科学研究院有限责任公司 | Modelling method and system for diode clamped cascaded multi-level converter |
-
2012
- 2012-12-26 CN CN2012207307106U patent/CN203086368U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001520A (en) * | 2012-12-26 | 2013-03-27 | 清华大学 | Modularized multi-level three-phase voltage source converter |
| CN103001520B (en) * | 2012-12-26 | 2014-08-20 | 清华大学 | Modularized multi-level three-phase voltage source converter |
| WO2017041428A1 (en) * | 2015-09-10 | 2017-03-16 | 南方电网科学研究院有限责任公司 | Modelling method and system for diode clamped cascaded multi-level converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103001520B (en) | Modularized multi-level three-phase voltage source converter | |
| CN204886704U (en) | High -power switching power supply circuit and have high -voltage inverter of this circuit | |
| CN108847777B (en) | Isolated modular cascade converter based on high-frequency chain technology | |
| CN102097967B (en) | Cascaded multi-level converter | |
| CN104601017A (en) | Modularized multi-level converter being able to traverse direct current short circuit fault | |
| CN203086368U (en) | Modular multi-level three-phase voltage source converter | |
| CN104716855A (en) | Current-type quasi-impedance source inverter with two-way power flow | |
| CN105429496A (en) | Modular multilevel converter with DC fault elimination function | |
| CN106992675A (en) | A kind of switched inductors capacitance group and unit supercharging high voltage gain DC converter | |
| CN202435113U (en) | Inverter auxiliary power supply electricity-getting circuit | |
| CN103441676A (en) | Modularized device for conversion between high-voltage direct current and direct current | |
| CN102664514A (en) | Switch tube unit, five-level inverters and power generation system with same | |
| CN202563019U (en) | Experimental system for testing characteristics of offshore wind electric flexible direct current transmission converter | |
| CN102420538B (en) | Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit | |
| CN206211871U (en) | With the mixing module multilevel converter for removing direct-current short circuit failure function | |
| CN202798002U (en) | Chained static synchronous compensator | |
| CN205265553U (en) | Take many level of modularization transverter of direct current fault clearance function | |
| CN205105115U (en) | Many level of modularization transverter and transverter module | |
| CN103516243B (en) | A kind of modular multi-level converter unsteady flow modular circuit with short-circuit protection | |
| CN103595282A (en) | Current conversion module circuit of modularized multi-level current converter | |
| CN106301041A (en) | A kind of hybrid guided mode massing multilevel converter of band direct-current short circuit error protection | |
| CN202772805U (en) | Three-phase voltage source converter | |
| CN204119076U (en) | Three-level three-phase bridge circuit and modular construction thereof | |
| CN202084952U (en) | On-grid power converter device of switched reluctance generator | |
| CN108768195B (en) | Power circuit, power module and converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130724 Effective date of abandoning: 20140820 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130724 Effective date of abandoning: 20140820 |
|
| RGAV | Abandon patent right to avoid regrant |