CN110488114A - Cascade converter submodule based on reversed series connection structure tests circuit - Google Patents
Cascade converter submodule based on reversed series connection structure tests circuit Download PDFInfo
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- CN110488114A CN110488114A CN201910665459.6A CN201910665459A CN110488114A CN 110488114 A CN110488114 A CN 110488114A CN 201910665459 A CN201910665459 A CN 201910665459A CN 110488114 A CN110488114 A CN 110488114A
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- submodule
- test cell
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- tested
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The present invention provides a kind of, and the cascade converter submodule based on reversed series connection structure tests circuit, comprising: current feedback circuit and test cell, the current feedback circuit provide test electric current to the test cell；Wherein, each test cell includes the tested submodule of two differential concatenations；It is in series relationship between test cell；When the test cell receives the test electric current that the current feedback circuit is sent, the test cell tests the voltage signal of the tested submodule, or the voltage signal and current signal of the test tested submodule.Work condition analogue of the cascade converter under rectification, inverter operation mode may be implemented in the present invention, and can be realized test while to multiple submodule, promotes testing efficiency.The structure that submodule reversely concatenates can offset the DC component in capacitance voltage, reduce test DC voltage requirement.
Description
Technical field
The present invention relates to power electronics fields, and in particular, to the cascade converter based on reversed series connection structure
Submodule tests circuit.
Background technique
Cascade converter is made of sub-module cascade, its own structure is convenient for expanding, especially in high voltage, big
Has good prospect under the Run-time scenario of capacity.Since the operation characteristic and current transformer of submodule are closely related, in order to ensure becoming
The operation reliably and with long-term for flowing device carries out test to operation characteristic of the submodule in actual condition and has great importance.
However existing test platform measurement condition is more single, due to testing the limitation of DC voltage, cannot achieve pair
It is tested while multiple submodule.Submodule is tested therefore, it is necessary to a kind of simple, reliable test circuit for accurate simulation to exist
Operating condition in real system, and realize and test and reduce while multiple submodule is under various working to test direct current
The requirement of pressure, to improve testing efficiency.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of, and the cascade connection type based on reversed series connection structure becomes
It flows device submodule and tests circuit.
A kind of cascade converter submodule test circuit based on reversed series connection structure provided according to the present invention, it is special
Sign is, comprising: current feedback circuit and test cell, the current feedback circuit provide test electric current to the test cell；Its
In, each test cell includes the tested submodule of two differential concatenations；It is in series relationship between test cell；When described
When test cell receives the test electric current that the current feedback circuit is sent, the test cell tests the tested submodule
Voltage signal, or the voltage signal and current signal of the test tested submodule.
Optionally, the current feedback circuit includes: single-phase converter and filter；The first end of the single-phase converter with
The input terminal of the filter connects, and the filter output is connected with the first input end of the concatenated test cell,
The second end of the single-phase converter is connected with the second input terminal of the concatenated test cell.
Optionally, the tested submodule includes: bridge-type current transformer and capacitor, the bridge-type current transformer and the capacitor
Device is in parallel.
Optionally, the bridge-type current transformer in the tested submodule includes following any:
Semi-bridge type current transformer；
Bridge-type current transformer.
Optionally, the tested submodule of two differential concatenations connection in the test cell for simulating cascade connection type respectively
The operating condition of current transformer rectification or inversion；The capacitance voltage DC component direction of the tested submodule of two differential concatenations connection
On the contrary, equal in magnitude.
Optionally, the filter in the current feedback circuit uses following any kind:
L-type filter, LC mode filter, LCL type filter.
Optionally, it is tested submodule in the test cell and corresponds to the submodule in practical cascade type current transformer, the electricity
Flow-generator generates electric current and corresponds to the electricity for being tested submodule bridge arm where in practical cascade type current transformer in the test cell
Stream；The test electric current includes: the upper and lower bridge arm current of each phase.
Optionally, the test cell and its internal tested submodule be not under the premise of changing electric connecting relation, In
It can be arranged in any order in test circuit.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the cascade converter submodule provided by the invention based on reversed series connection structure tests circuit, each of which survey
Try unit include two tested submodules reversely concatenated, can be realized to submodule same in cascade converter rectification,
It is simulated while two kinds of operating conditions of inversion.In addition, while several series connection test cells can be realized multiple submodule
Test, the test cell of tandem type significantly improve testing efficiency, reduce testing cost convenient for expanding.
2, same test in the cascade converter submodule test circuit provided by the invention based on reversed series connection structure
The basic structure that two tested submodules reversely concatenate in unit ensures the direct current in two tested submodule capacitor voltages point
Amount is cancelled out each other, and the requirement to DC voltage in test circuit is significantly reduced.
3, the cascade converter submodule provided by the invention based on reversed series connection structure tests circuit, can be by changing
The output electric current of power transformation flow-generator and the quantity of tested submodule are configured flexibly the corresponding working condition of test, improve reality
The flexibility tested.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the structural representation that the cascade converter submodule of the invention based on reversed series connection structure tests circuit
Figure；
Fig. 2 is that the cascade converter submodule of the invention based on reversed series connection structure tests current feedback circuit in circuit
The first topological structure schematic diagram；
Fig. 3 is that the cascade converter submodule of the invention based on reversed series connection structure tests current feedback circuit in circuit
Second of topological structure schematic diagram；
Fig. 4 is that the cascade converter submodule of the invention based on reversed series connection structure tests test cell in circuit
The first topological structure schematic diagram；
Fig. 5 is that the cascade converter submodule of the invention based on reversed series connection structure tests test cell in circuit
Second of topological structure schematic diagram.
In figure:
1- current feedback circuit；
2- test cell.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
Present embodiments provide a kind of cascade converter submodule test circuit based on reversed series connection structure, analog
Cascade converter include but is not limited to half-bridge, bridge-type modular multi-level converter (Modular Multilevel
Converter, MMC) and cascade h-bridge converter (Cascaded H-Bridge Converter, CHB).
Specifically, Fig. 1 is the knot that the cascade converter submodule of the invention based on reversed series connection structure tests circuit
Structure schematic diagram, as shown in Figure 1, may include: current feedback circuit 1 and test cell 2, current feedback circuit 1 is provided to test cell 2
Test electric current；Wherein, each test cell 2 includes the tested submodule of two differential concatenations；It is closed between test cell 2 in series connection
System；When test cell 2 receives the test electric current of the transmission of current feedback circuit 1, test cell 2 tests the voltage of tested submodule
Signal, or test the voltage signal and current signal of tested submodule.
Specifically, it referring to Fig. 1, is connected in series between test cell 2.Wherein, current feedback circuit 1 is for generating test electricity
Stream, implementation are as follows: be mainly made of single-phase converter and its corresponding port filter out；Wherein, single-phase converter and its right
That answers goes out the circuit connecting relation between port filter are as follows: single-phase converter exports upper end and is connected with outlet filter input end mouth
It connects.
In the present embodiment, the output end of current feedback circuit 1 is connected with the test cell 2 of several series connections, for giving birth to
At the test electric current for flowing through tested submodule inside test cell 2；Test cell 2, input terminal are connected use with current feedback circuit 1
Electric current is tested in receiving, and the capacitance voltage signal for being tested submodule in close beta unit is exported to outside；
The present embodiment generates test electric current by current feedback circuit, and is realized by test cell 2 and become to practical cascade type
In stream device multiple tested submodules under a variety of operating conditions while simulate, significantly reduce requirement to DC voltage, and mention
High testing efficiency.
Further, in above-described embodiment, current feedback circuit 1 has the output port at least one set of both ends, the electricity of output
Flow iaCorresponding practical cascade type current transformer is tested the electric current of submodule place bridge arm, and the single-phase converter in current feedback circuit 1 can
With using including but is not limited to any two level and multi-level circuit topological structure including Fig. 2, Fig. 3, port filter can be with out
Using any filter including including but not limited to L, LC, LCL type filter.
Test cell is made of tested submodule, each test cell includes the tested son of two differential concatenations connection
Module, several test cells are connected in series.Test cell receives the test electric current that current feedback circuit generates, and is output to the outside each
The voltage signal of submodule is tested in test cell, or, voltage signal and current signal.Wherein, current signal refers to: tested son
The outlet electric current of module.Circuit connecting relation in the present embodiment, between current feedback circuit and test cell are as follows: current feedback circuit
Middle filter output mouth and single-phase converter output lower end respectively correspond several upper and lower two ends that test cell is connected in series
Mouthful.
The circuit topological structure of test cell are as follows: the semi-bridge types of two differential concatenations connection or the current transformer of other forms and
Its shunt capacitor；The current transformer and its shunt capacitance of semi-bridge type therein or other forms collectively form tested submodule.Tool
Body, as shown in Fig. 2, circuit topological structure are as follows: semi-bridge type current transformer；As shown in figure 3, circuit topological structure are as follows: bridge-type becomes
Flow device.
In the present embodiment, the tested submodule of two differential concatenations in each test cell simulates cascade connection type unsteady flow respectively
The various workings such as device rectification or inverter operation；The tested submodule capacitor voltage DC component direction phase of two differential concatenations connection
Instead, it and can cancel out each other.
In the present embodiment, current feedback circuit includes at least two current output terminal mouths, can be using including but not limited to half
The topological structure of bridge type, bridge-type current transformer；Port filter uses L, LC or LCL type filter out.
In above-described embodiment, current feedback circuit output electric current flows through test cell 2, therefore the tested son in test cell 2
Module can correspond to the upper and lower bridge arm submodule of each phase of practical current transformer.Test cell 2 includes to be not limited to two reversely to concatenate
Tested submodule, tested submodule correspond to the submodule of practical cascade type current transformer, be tested submodule topological structure include but
It is not limited to Fig. 4, the topological structure shown in fig. 5 being made of half-bridge and full-bridge submodule.
Specifically: as shown in figure 4, circuit topological structure are as follows: the semi-bridge type current transformer of two differential concatenations connection and its simultaneously
Join capacitor.As shown in figure 5, circuit topological structure are as follows: the bridge-type current transformer and its shunt capacitance of two differential concatenations connection
Device.
The single-phase test electricity of the cascade converter submodule based on reversed series connection structure that the above embodiment of the present invention proposes
Road may be implemented the operating condition simulation to any submodule of cascade converter, and realize multiple submodule in a variety of works
It is tested while under condition, and effectively lower test DC voltage requirement, saves testing cost and promote testing efficiency.Above to this
The specific embodiment of invention is described.It is to be appreciated that the present invention is not limited to the above specific embodiments, ability
Field technique personnel can make a variety of changes or modify within the scope of the claims, this has no effect in essence of the invention
Hold.In the absence of conflict, the feature in embodiments herein and embodiment can be arbitrarily combined with each other.
Claims (8)
1. a kind of cascade converter submodule based on reversed series connection structure tests circuit characterized by comprising electric current hair
Raw device and test cell, the current feedback circuit provide test electric current to the test cell；Wherein, each test cell
Tested submodule including two differential concatenations；It is in series relationship between test cell；Described in being received when the test cell
When the test electric current that current feedback circuit is sent, the test cell tests the voltage signal of the tested submodule, or test
The voltage signal and current signal of the tested submodule.
2. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, the current feedback circuit includes: single-phase converter and filter；The first end of the single-phase converter and the filter
Input terminal connection, the filter output is connected with the first input end of the concatenated test cell, the single-phase change
The second end of stream device is connected with the second input terminal of the concatenated test cell.
3. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, the tested submodule includes: bridge-type current transformer and capacitor, and the bridge-type current transformer and the capacitor are in parallel.
4. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, the bridge-type current transformer in the tested submodule includes following any:
Semi-bridge type current transformer；
Bridge-type current transformer.
5. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, the tested submodule of two in the test cell differential concatenation connection is for simulation cascade converter rectification respectively
Or the operating condition of inversion；The capacitance voltage DC component of the tested submodule of two differential concatenations connection is contrary, size
It is equal.
6. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, the filter in the current feedback circuit uses following any kind:
L-type filter, LC mode filter, LCL type filter.
7. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, submodule is tested in the test cell and corresponds to the submodule in practical cascade type current transformer, the current feedback circuit is raw
The electric current of bridge arm where being tested submodule in the test cell in practical cascade type current transformer is corresponded at electric current；The test
Electric current includes: the upper and lower bridge arm current of each phase.
8. the cascade converter submodule according to claim 1 based on reversed series connection structure tests circuit, feature
It is, the test cell and its internal tested submodule be not under the premise of changing electric connecting relation, in test circuit
It can be arranged in any order.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910665459.6A CN110488114A (en) | 2019-07-23 | 2019-07-23 | Cascade converter submodule based on reversed series connection structure tests circuit |
| US17/283,566 US11899067B2 (en) | 2019-07-23 | 2020-07-23 | Testing circuit, system and control method for multiple submodules of cascaded converter |
| PCT/CN2020/103857 WO2021013229A1 (en) | 2019-07-23 | 2020-07-23 | Testing circuit and system for cascaded converter multi-submodule, and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910665459.6A CN110488114A (en) | 2019-07-23 | 2019-07-23 | Cascade converter submodule based on reversed series connection structure tests circuit |
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| Publication Number | Publication Date |
|---|---|
| CN110488114A true CN110488114A (en) | 2019-11-22 |
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| CN201910665459.6A Pending CN110488114A (en) | 2019-07-23 | 2019-07-23 | Cascade converter submodule based on reversed series connection structure tests circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013229A1 (en) * | 2019-07-23 | 2021-01-28 | 上海交通大学 | Testing circuit and system for cascaded converter multi-submodule, and control method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534063A (en) * | 2009-04-24 | 2009-09-16 | 清华大学 | Cascade connection polyphase converter |
| CN102565579A (en) * | 2011-12-16 | 2012-07-11 | 中电普瑞科技有限公司 | Testing device for operation of current changing chain and control method |
| CN109709363A (en) * | 2019-01-29 | 2019-05-03 | 上海交通大学 | The control method and system of cascade converter multi-tool block multi-state simulation device |
| CN109709434A (en) * | 2019-01-29 | 2019-05-03 | 上海交通大学 | The test circuit of cascade converter multi-tool block multi-state simulation |
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2019
- 2019-07-23 CN CN201910665459.6A patent/CN110488114A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534063A (en) * | 2009-04-24 | 2009-09-16 | 清华大学 | Cascade connection polyphase converter |
| CN102565579A (en) * | 2011-12-16 | 2012-07-11 | 中电普瑞科技有限公司 | Testing device for operation of current changing chain and control method |
| CN109709363A (en) * | 2019-01-29 | 2019-05-03 | 上海交通大学 | The control method and system of cascade converter multi-tool block multi-state simulation device |
| CN109709434A (en) * | 2019-01-29 | 2019-05-03 | 上海交通大学 | The test circuit of cascade converter multi-tool block multi-state simulation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013229A1 (en) * | 2019-07-23 | 2021-01-28 | 上海交通大学 | Testing circuit and system for cascaded converter multi-submodule, and control method therefor |
| US11899067B2 (en) | 2019-07-23 | 2024-02-13 | Shanghai Jiao Tong University | Testing circuit, system and control method for multiple submodules of cascaded converter |
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Application publication date: 20191122 |
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