CN110943636A - Multi-level module for clearing direct current short-circuit current - Google Patents
Multi-level module for clearing direct current short-circuit current Download PDFInfo
- Publication number
- CN110943636A CN110943636A CN201911167719.3A CN201911167719A CN110943636A CN 110943636 A CN110943636 A CN 110943636A CN 201911167719 A CN201911167719 A CN 201911167719A CN 110943636 A CN110943636 A CN 110943636A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- switch tube
- tube
- switching tube
- module
- 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.)
- Granted
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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to a multi-level module for eliminating direct current short-circuit current, which comprises: the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth diode, the first capacitor, the second capacitor and the third capacitor; the emitter of the first switch tube is connected with the collector of the second switch tube, the collector of the first switch tube is connected with the anode of the first capacitor, the emitter of the second switch tube is connected with the emitter of the third switch tube and is connected with the cathode of the sixth diode, the collector of the third switch tube is connected with the cathode of the first capacitor, is connected with the anode of the second capacitor and is connected with the collector of the fourth switch tube, the emitter of the fourth switch tube is connected with the collector of the fifth switch tube, the emitter of the fifth switch tube is connected with the anode of the sixth diode and is connected with the cathode of the third capacitor, and the anode of the third capacitor is connected with the cathode of the second capacitor.
Description
Technical Field
The invention belongs to the technical field of high-voltage direct-current power transmission, and particularly relates to a multi-level module for clearing direct-current short-circuit current.
Background
With the rapid development of modern power electronic technology, a High Voltage Direct Current (HVDC) system based on a Modular Multilevel Converter (MMC) has come into operation and is receiving wide attention from the society.
The MMC adopts a modular topological structure, has a series of advantages of simple structure, easy expansion, low harmonic content, low loss and the like, and has huge application prospect in the occasions of renewable energy grid connection, urban power grid power supply, asynchronous alternating current power grid interconnection and the like.
Aiming at flexible high-voltage direct-current transmission in an overhead line occasion, after a direct-current side inter-pole short circuit fault occurs, the fault causes great damage to a system and develops rapidly, however, the technology for clearing direct-current fault current is still imperfect, the research on a high-voltage large-capacity direct-current circuit breaker is not mature, and in order to solve the problem that the traditional half-bridge MMC does not have the capacity of clearing the direct-current short circuit current, a bidirectional anti-parallel thyristor submodule, a full-bridge submodule and a mixed submodule are mainly proposed at present. According to the bidirectional anti-parallel thyristor submodule structure, after a direct current fault occurs, the bidirectional anti-parallel thyristors are conducted through locking the IGBTs in the submodule at the same time, a direct current short circuit is converted into an alternating current short circuit, a freewheeling diode is protected, and therefore natural attenuation of direct current side fault current is achieved. However, due to different actual circuit parameters, the phenomenon of slow attenuation of the fault current is easy to occur, and the self-clearing effect of the fault current is not ideal. The full-bridge submodule structure can effectively restrain short-circuit current, but the number of used devices is twice that of the traditional half-bridge type, and the economic benefit is poor. The hybrid sub-module further reduces the number of power devices, but compared with the half-bridge sub-module, the number of devices is still large, and the back electromotive force provided during fault blocking is small, which is not beneficial to fast clearing of fault current. This is a disadvantage of the prior art.
In view of the above, it is desirable to provide a multi-level module for clearing dc short-circuit current to overcome the drawbacks of the prior art.
Disclosure of Invention
The present invention is directed to a multi-level module for clearing dc short-circuit current, which solves the above-mentioned problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a multi-level module for clearing dc short circuit current, comprising:
the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth diode, the first capacitor, the second capacitor and the third capacitor;
each switch tube comprises an IGBT tube and an anti-parallel diode, the emitting electrode of the IGBT tube is electrically connected with the anode of the anti-parallel diode, the collecting electrode of the IGBT tube is electrically connected with the cathode of the anti-parallel diode,
the emitter of the first switch tube is connected with the collector of the second switch tube, the collector of the first switch tube is connected with the anode of the first capacitor, the emitter of the second switch tube is connected with the emitter of the third switch tube and is connected with the cathode of the sixth diode, the collector of the third switch tube is connected with the cathode of the first capacitor, is connected with the anode of the second capacitor and is connected with the collector of the fourth switch tube, the emitter of the fourth switch tube is connected with the collector of the fifth switch tube, the emitter of the fifth switch tube is connected with the anode of the sixth diode and is connected with the cathode of the third capacitor, and the anode of the third capacitor is connected with the cathode of the second capacitor.
The collector of the IGBT tube is the collector of the corresponding switch tube, and the emitter of the IGBT tube is the emitter of the corresponding switch tube.
Preferably, the emitter of the first switching tube is used as the positive pole of the output end of the module, and the emitter of the fourth switching tube is used as the negative pole of the output end of the module; output voltage of UoutReference direction of input current and output voltage UoutAre the same in reference direction; the circuit structure of the module is effectively utilized to clear fault current.
Preferably, U isC1＝UC2＝UC3Rated value of capacitor voltage Ucref。
Preferably, when the inverter is in normal operation and Uout is equal to 0, the second switching tube, the third switching tube and the fourth switching tube are in a conducting state, the first switching tube and the fifth switching tube are in a disconnecting state, and at this time, the first capacitor, the second capacitor and the third capacitor are all bypassed;
when Uout is equal to Ucref, the first switching tube and the fourth switching tube are in a conducting state, the second switching tube, the third switching tube and the fifth switching tube are in a closing state, at the moment, the second capacitor and the third capacitor are bypassed, and the first capacitor is put into use;
when Uout is 2Ucref, the second switching tube, the third switching tube and the fifth switching tube are in a conducting state, the first switching tube and the fourth switching tube are in a turn-off state, the first capacitor is bypassed at the moment, and the second capacitor and the third capacitor are switched in;
when Uout is 3Ucref, the first switching tube and the fifth switching tube are in a conducting state, the second switching tube, the third switching tube and the fourth switching tube are in a disconnecting state, and the first capacitor, the second capacitor and the third capacitor are switched on at the moment.
Preferably, when a direct-current short-circuit fault occurs in the system, all the switch tubes are locked, when the bridge arm current is positive, the bridge arm current flows through the anti-parallel diodes D1 and D5, at the moment, the first capacitor, the second capacitor and the third capacitor are switched in, the bridge arm current charges the first capacitor, the second capacitor and the third capacitor and rapidly attenuates to zero, when the bridge arm current is negative, the bridge arm current flows through the anti-parallel diode D4 and the diode D6, at the moment, the second capacitor and the third capacitor are switched in, the multi-level sub-module externally provides reverse capacitor voltage 2Ucref, and the bridge arm current charges the second capacitor and the third capacitor and rapidly attenuates to zero.
Preferably, the number N of capacitors needing to be put into the bridge is obtained by a nearest level approximation method, when the bridge arm current direction is positive in normal operation, capacitor voltage sequencing preferentially selects the submodule with the minimum multilevel submodule voltage (UC1+ UC2+ UC3) to put into and output 3Ucref, then selects the submodule with the minimum residual submodule voltage (UC2+ UC3) to put into and output 2Ucref, and finally selects the submodule with the minimum residual submodule voltage UC1 to put into and output Ucref;
when the direction of current of the bridge arm is negative, the submodule with the maximum multi-level submodule voltage (UC1+ UC2+ UC3) is preferentially selected to be put into and output 3Ucref, the submodule with the maximum residual submodule voltage (UC2+ UC3) is selected to be put into and output 2Ucref, and finally the submodule with the maximum residual submodule voltage UC1 is selected to be put into and output Ucref.
Therefore, the function of balancing the capacitor voltage of each submodule is realized.
The invention has the advantages that under the condition of the same output level number, compared with a full-bridge submodule, a mixed submodule, a cross-connection submodule and a diode clamping submodule, the invention uses fewer switching devices, thereby greatly reducing the manufacturing cost of the initial stage of equipment. Compared with a cross connection type submodule and a hybrid type submodule, the invention can provide higher reverse capacitance voltage for a bridge arm after the converter is locked when a fault occurs, and achieves the purpose of rapidly clearing fault current.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is a topology diagram of a multilevel module for clearing dc short-circuit current according to the present invention.
Fig. 2-5 are schematic diagrams of multilevel module current paths under normal operation.
Fig. 6-7 are schematic diagrams of multilevel module current paths in the event of a fault.
1-a first switching tube, 2-a second switching tube, 3-a third switching tube, 4-a fourth switching tube, 5-a fifth switching tube, T1-an IGBT tube of the first switching tube, D1-an anti-parallel diode of the first switching tube, T2-an IGBT tube of the second switching tube, D2-an anti-parallel diode of the second switching tube, T3-an IGBT tube of the third switching tube, D3-an anti-parallel diode of the third switching tube, T4-an IGBT tube of the fourth switching tube, D4-an anti-parallel diode of the fourth switching tube, T5-an IGBT tube of the fifth switching tube, D5-an anti-parallel diode of the fifth switching tube, 6-a sixth diode, 7-a first capacitor, 8-a second capacitor, and 9-a third capacitor.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
As shown in fig. 1 to 7, the present embodiment provides a multi-level module for clearing a dc short-circuit current, including:
the circuit comprises a first switching tube 1, a second switching tube 2, a third switching tube 3, a fourth switching tube 4, a fifth switching tube 5, a sixth diode 6, a first capacitor 7, a second capacitor 8 and a third capacitor 9;
each switch tube comprises an IGBT tube and an anti-parallel diode, the emitting electrode of the IGBT tube is electrically connected with the anode of the anti-parallel diode, the collecting electrode of the IGBT tube is electrically connected with the cathode of the anti-parallel diode,
an emitting electrode of the first switch tube 1 is connected with a collecting electrode of the second switch tube 2, the collecting electrode of the first switch tube 1 is connected with an anode of a first capacitor 7, an emitting electrode of the second switch tube 2 is connected with an emitting electrode of the third switch tube 3 and is connected with a cathode of a sixth diode 6, a collecting electrode of the third switch tube 3 is connected with a cathode of the first capacitor 7, is connected with an anode of a second capacitor 8 and is connected with a collecting electrode of a fourth switch tube 4, an emitting electrode of the fourth switch tube 4 is connected with a collecting electrode of a fifth switch tube 5, an emitting electrode of the fifth switch tube 5 is connected with an anode of the sixth diode 6 and is connected with a cathode of a third capacitor 9, and an anode of the third capacitor 9 is connected with a cathode of the second capacitor 8. As shown in fig. 1.
The collector of the IGBT tube is the collector of the corresponding switch tube, and the emitter of the IGBT tube is the emitter of the corresponding switch tube.
In this embodiment, the emitter of the first switching tube 1 is used as the positive pole of the output end of the module, and the emitter of the fourth switching tube 4 is used as the negative pole of the output end of the module; output voltage of UoutReference direction of input current and output voltage UoutAre the same in reference direction; the circuit structure of the module is effectively utilized to clear fault current.
In this embodiment, UC1＝UC2＝UC3Rated value of capacitor voltage Ucref。
In this embodiment, when the inverter is in normal operation and Uout is equal to 0, the second switching tube 2, the third switching tube 3, and the fourth switching tube 4 are in a conducting state, the first switching tube 1 and the fifth switching tube 5 are in a turn-off state, and at this time, the first capacitor 7, the second capacitor 8, and the third capacitor 9 are all bypassed; as shown in fig. 2.
When Uout is Ucref, the first switching tube 1 and the fourth switching tube 4 are in a conducting state, the second switching tube 2, the third switching tube 3 and the fifth switching tube 5 are in a turn-off state, at this time, the second capacitor 8 and the third capacitor 9 are all bypassed, and the first capacitor 7 is put in; as shown in fig. 3.
When Uout is 2Ucref, the second switching tube 2, the third switching tube 3 and the fifth switching tube 5 are in a conducting state, the first switching tube 1 and the fourth switching tube 4 are in a turn-off state, at this time, the first capacitor 7 is bypassed, and the second capacitor 8 and the third capacitor 9 are switched in; as shown in fig. 4.
When Uout is 3Ucref, the first switching tube 1 and the fifth switching tube 5 are in a conducting state, the second switching tube 2, the third switching tube 3 and the fourth switching tube 4 are in a turn-off state, and the first capacitor 7, the second capacitor 8 and the third capacitor 9 are switched on; as shown in fig. 5.
In this embodiment, when a dc short-circuit fault occurs in the system, all the switching tubes are locked, and when the bridge arm current is positive, as shown in fig. 6, the bridge arm current flows through the anti-parallel diodes D1 and D5, at this time, the first capacitor 7, the second capacitor 8, and the third capacitor 9 are put into use, and the bridge arm current charges the first capacitor 7, the second capacitor 8, and the third capacitor 9, and rapidly decays to zero; when the bridge arm current is negative, as shown in fig. 7, the bridge arm current flows through the anti-parallel diode D4 and the diode D6, at this time, the second capacitor and the third capacitor are put into use, the multi-level sub-module provides the reverse capacitor voltage 2Ucref to the outside, and the bridge arm current charges the second capacitor 8 and the third capacitor 9 and rapidly attenuates to zero.
In the embodiment, the number N of capacitors to be input is obtained by a nearest level approximation method, when the bridge arm current direction is positive during normal operation, the capacitor voltage sequence is preferably selected to input and output 3Ucref by the sub-module with the minimum multi-level sub-module voltage (UC1+ UC2+ UC3), then the sub-module with the minimum residual sub-module voltage (UC2+ UC3) is selected to input and output 2Ucref, and finally the sub-module with the minimum residual sub-module voltage UC1 is selected to input and output Ucref;
when the direction of current of the bridge arm is negative, the submodule with the maximum multi-level submodule voltage (UC1+ UC2+ UC3) is preferentially selected to be put into and output 3Ucref, the submodule with the maximum residual submodule voltage (UC2+ UC3) is selected to be put into and output 2Ucref, and finally the submodule with the maximum residual submodule voltage UC1 is selected to be put into and output Ucref.
Therefore, the function of balancing the capacitor voltage of each submodule is realized.
It can be seen from table 1 that under the condition of self-clearing capability of direct current short-circuit current and the same number of output levels, compared with the full-bridge submodule, the hybrid submodule, the cross-connection submodule and the diode clamping submodule, the invention uses fewer switching devices, greatly reduces the initial cost of the equipment, and compared with the hybrid submodule and the cross-connection submodule, the invention can provide higher reverse capacitance voltage for a bridge arm after the converter is locked due to a fault, thereby achieving the purpose of clearing fault current more quickly.
TABLE 1 number of switching tubes per sub-module type per unit level and reverse capacitor voltage supplied in case of failure
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A multi-level module for clearing dc short circuit current, comprising:
the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, the sixth diode, the first capacitor, the second capacitor and the third capacitor;
each switch tube comprises an IGBT tube and an anti-parallel diode, the emitting electrode of the IGBT tube is electrically connected with the anode of the anti-parallel diode, the collecting electrode of the IGBT tube is electrically connected with the cathode of the anti-parallel diode,
the emitter of the first switch tube is connected with the collector of the second switch tube, the collector of the first switch tube is connected with the anode of the first capacitor, the emitter of the second switch tube is connected with the emitter of the third switch tube and is connected with the cathode of the sixth diode, the collector of the third switch tube is connected with the cathode of the first capacitor, is connected with the anode of the second capacitor and is connected with the collector of the fourth switch tube, the emitter of the fourth switch tube is connected with the collector of the fifth switch tube, the emitter of the fifth switch tube is connected with the anode of the sixth diode and is connected with the cathode of the third capacitor, and the anode of the third capacitor is connected with the cathode of the second capacitor.
2. A cleaning according to claim 1The multi-level module of the direct current short circuit current is characterized in that an emitting electrode of a first switching tube is used as a positive electrode of the output end of the module, and an emitting electrode of a fourth switching tube is used as a negative electrode of the output end of the module; output voltage of UoutReference direction of input current and output voltage UoutThe reference direction of (3) is the same.
3. The multilevel module for clearing dc short-circuit current of claim 2, wherein U isC1＝UC2＝UC3Rated value of capacitor voltage Ucref。
4. A multi-level module for clearing dc short-circuit current according to claim 3, wherein when the inverter is in normal operation and Uout is 0, the second switch tube, the third switch tube and the fourth switch tube are in on state, the first switch tube and the fifth switch tube are in off state, and the first capacitor, the second capacitor and the third capacitor are all bypassed;
when Uout is equal to Ucref, the first switching tube and the fourth switching tube are in a conducting state, the second switching tube, the third switching tube and the fifth switching tube are in a closing state, at the moment, the second capacitor and the third capacitor are bypassed, and the first capacitor is put into use;
when Uout is 2Ucref, the second switching tube, the third switching tube and the fifth switching tube are in a conducting state, the first switching tube and the fourth switching tube are in a turn-off state, the first capacitor is bypassed at the moment, and the second capacitor and the third capacitor are switched in;
when Uout is 3Ucref, the first switching tube and the fifth switching tube are in a conducting state, the second switching tube, the third switching tube and the fourth switching tube are in a disconnecting state, and the first capacitor, the second capacitor and the third capacitor are switched on at the moment.
5. The multi-level module for clearing DC short-circuit current according to claim 3, wherein when the system has DC short-circuit fault, all switch tubes are locked, when the bridge arm current is positive, the bridge arm current flows through anti-parallel diodes D1 and D5, the first capacitor, the second capacitor and the third capacitor are put in, the bridge arm current charges the first capacitor, the second capacitor and the third capacitor and rapidly decays to zero, when the bridge arm current is negative, the bridge arm current flows through anti-parallel diode D4 and diode D6, the second capacitor and the third capacitor are put in, the multi-level sub-module provides reverse capacitor voltage 2Ucref to the outside, and the bridge arm current charges the second capacitor and the third capacitor and rapidly decays to zero.
6. The multilevel module for clearing direct-current short-circuit current according to claim 3, wherein the number N of capacitors to be fed is obtained by a nearest level approximation method, when the bridge arm current direction is positive in normal operation, the capacitor voltage sequence is positive, the submodule with the minimum multilevel submodule voltage UC1+ UC2+ UC3 is preferentially selected to be fed and output 3Ucref, the submodule with the minimum residual submodule voltage UC2+ UC3 is selected to be fed and output 2Ucref, and the submodule with the minimum residual submodule voltage UC1 is selected to be fed and output Ucref;
when the direction of current of the bridge arm is negative, the largest sub-module of multi-level sub-module voltage UC1+ UC2+ UC3 is preferentially selected to be put into and output 3Ucref, the largest sub-module of remaining sub-module voltage UC2+ UC3 is selected to be put into and output 2Ucref, and finally the largest sub-module of remaining sub-module voltage UC1 is selected to be put into and output Ucref.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167719.3A CN110943636B (en) | 2019-11-25 | 2019-11-25 | Multi-level module for eliminating direct current short-circuit current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167719.3A CN110943636B (en) | 2019-11-25 | 2019-11-25 | Multi-level module for eliminating direct current short-circuit current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110943636A true CN110943636A (en) | 2020-03-31 |
| CN110943636B CN110943636B (en) | 2023-04-28 |
Family
ID=69908212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911167719.3A Active CN110943636B (en) | 2019-11-25 | 2019-11-25 | Multi-level module for eliminating direct current short-circuit current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110943636B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731059A (en) * | 2013-06-13 | 2014-04-16 | 华北电力大学 | Novel double-clamping sub-module structure circuit of modular multilevel converter |
| US20140177292A1 (en) * | 2012-12-21 | 2014-06-26 | Dennis A. Woodford | Multilevel valve for voltage sourced converter transmission |
| CN103944430A (en) * | 2014-04-25 | 2014-07-23 | 中国科学院电工研究所 | Modularization multi-level current converter subunit topology part |
| CN104393776A (en) * | 2014-10-23 | 2015-03-04 | 南京南瑞继保电气有限公司 | Rectifier inverter unit, multilevel converter, control method thereof and control device |
| US20150357906A1 (en) * | 2012-12-28 | 2015-12-10 | Hyosung Corporation | Converter |
| CN106505897A (en) * | 2016-12-29 | 2017-03-15 | 华北电力大学 | A kind of low-loss MMC submodules topology for possessing DC Line Fault ride-through capability |
| CN106998151A (en) * | 2017-04-21 | 2017-08-01 | 上海交通大学 | Multilevel converter based on asymmetric Shuangzi module and half-bridge submodule |
| CN107231085A (en) * | 2017-04-07 | 2017-10-03 | 中国矿业大学 | One kind is based on the bipolar equipotential MMC HVDC direct-current short circuit fault ride-through methods of dc bus |
| CN107370406A (en) * | 2017-08-29 | 2017-11-21 | 华北电力大学（保定） | The level MMC submodules of failure self-cleaning three and the transverter with the submodule |
| CN107404246A (en) * | 2017-08-10 | 2017-11-28 | 华北电力大学（保定） | Failure self-cleaning MMC submodules and the transverter with the submodule |
| CN107910886A (en) * | 2017-12-12 | 2018-04-13 | 荣信汇科电气技术有限责任公司 | A kind of submodule topological structure and method for flexible direct current transmission converter valve |
| CN108023494A (en) * | 2016-11-02 | 2018-05-11 | 中国电力科学研究院 | A kind of modularization multi-level converter and its sub-modular structure |
| CN108631633A (en) * | 2018-05-30 | 2018-10-09 | 上海海事大学 | A kind of mixing capacitance voltage type Shuangzi block coupled in series topological structure based on MMC |
| CN108900103A (en) * | 2018-08-23 | 2018-11-27 | 中国能源建设集团广东省电力设计研究院有限公司 | The converter power module and inverter for having DC Line Fault self-cleaning ability |
| CN108964492A (en) * | 2018-06-20 | 2018-12-07 | 东南大学 | A kind of low spoilage module Multilevel Inverters topology having dc-side short-circuit fault isolating power |
-
2019
- 2019-11-25 CN CN201911167719.3A patent/CN110943636B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140177292A1 (en) * | 2012-12-21 | 2014-06-26 | Dennis A. Woodford | Multilevel valve for voltage sourced converter transmission |
| US20150357906A1 (en) * | 2012-12-28 | 2015-12-10 | Hyosung Corporation | Converter |
| CN103731059A (en) * | 2013-06-13 | 2014-04-16 | 华北电力大学 | Novel double-clamping sub-module structure circuit of modular multilevel converter |
| CN103944430A (en) * | 2014-04-25 | 2014-07-23 | 中国科学院电工研究所 | Modularization multi-level current converter subunit topology part |
| CN104393776A (en) * | 2014-10-23 | 2015-03-04 | 南京南瑞继保电气有限公司 | Rectifier inverter unit, multilevel converter, control method thereof and control device |
| CN108023494A (en) * | 2016-11-02 | 2018-05-11 | 中国电力科学研究院 | A kind of modularization multi-level converter and its sub-modular structure |
| CN106505897A (en) * | 2016-12-29 | 2017-03-15 | 华北电力大学 | A kind of low-loss MMC submodules topology for possessing DC Line Fault ride-through capability |
| CN107231085A (en) * | 2017-04-07 | 2017-10-03 | 中国矿业大学 | One kind is based on the bipolar equipotential MMC HVDC direct-current short circuit fault ride-through methods of dc bus |
| CN106998151A (en) * | 2017-04-21 | 2017-08-01 | 上海交通大学 | Multilevel converter based on asymmetric Shuangzi module and half-bridge submodule |
| CN107404246A (en) * | 2017-08-10 | 2017-11-28 | 华北电力大学（保定） | Failure self-cleaning MMC submodules and the transverter with the submodule |
| CN107370406A (en) * | 2017-08-29 | 2017-11-21 | 华北电力大学（保定） | The level MMC submodules of failure self-cleaning three and the transverter with the submodule |
| CN107910886A (en) * | 2017-12-12 | 2018-04-13 | 荣信汇科电气技术有限责任公司 | A kind of submodule topological structure and method for flexible direct current transmission converter valve |
| CN108631633A (en) * | 2018-05-30 | 2018-10-09 | 上海海事大学 | A kind of mixing capacitance voltage type Shuangzi block coupled in series topological structure based on MMC |
| CN108964492A (en) * | 2018-06-20 | 2018-12-07 | 东南大学 | A kind of low spoilage module Multilevel Inverters topology having dc-side short-circuit fault isolating power |
| CN108900103A (en) * | 2018-08-23 | 2018-11-27 | 中国能源建设集团广东省电力设计研究院有限公司 | The converter power module and inverter for having DC Line Fault self-cleaning ability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110943636B (en) | 2023-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10084387B2 (en) | LCC and MMC series-connected HVDC system with DC fault ride-through capability | |
| WO2021135459A1 (en) | Series-parallel modular multi-level converter with cut-off capability and control method thereof | |
| WO2015180204A1 (en) | Submodule topology for modular multi-level converter and application thereof | |
| CN109256951B (en) | Direct-current voltage conversion device and control method thereof | |
| CN110224623B (en) | DC fault blocking modular multilevel converter and submodule | |
| CN104868748A (en) | Current converter module unit, current converter, DC power transmission system and control method | |
| CN113991662A (en) | LCC-MMC-based energy routing system and DC fault protection method | |
| CN102005957A (en) | Single-power supply cascade multi-level converter | |
| CN104852583A (en) | High-frequency link multi-level direct-current transformer used for middle- low-voltage direct current distribution | |
| CN113938037A (en) | Modular multilevel converter, fault ride-through method and electronic equipment | |
| CN203166540U (en) | Combined type high-voltage direct current transmission system | |
| CN111682788A (en) | Current active transfer type MMC power electronic transformer with fault blocking capability | |
| CN110768233A (en) | Combined high-voltage direct-current circuit breaker applicable to direct-current power grid and having power flow control function and control method thereof | |
| CN104993683A (en) | Modular multi-level current converter sub-module circuit | |
| CN102437743B (en) | Boost conversion circuit, solar inverter and control method thereof | |
| CN102437761B (en) | Single-phase full bridge three-level inverter and three-phase three-level inverter | |
| CN217769504U (en) | Direct current offshore power transmission system | |
| CN110829867A (en) | Novel MMC submodule topology with fault current symmetrical clearing capacity | |
| CN214959327U (en) | Energy storage circuit and modular multilevel converter | |
| CN105450045A (en) | Diagonal bridge sub-module-based modular multi-level converter | |
| CN205105115U (en) | Many level of modularization transverter and transverter module | |
| CN111884246B (en) | Direct-current fault clearing method of layered series-parallel direct-current transmission system | |
| CN110943636A (en) | Multi-level module for clearing direct current short-circuit current | |
| CN113992037B (en) | Bidirectional self-blocking plug module topological structure and fault ride-through method thereof | |
| CN117792136B (en) | Multi-level inverter topological structure for photovoltaic grid connection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |