CN209896688U - Series converter module with fault isolation function - Google Patents
Series converter module with fault isolation function Download PDFInfo
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- CN209896688U CN209896688U CN201920525347.6U CN201920525347U CN209896688U CN 209896688 U CN209896688 U CN 209896688U CN 201920525347 U CN201920525347 U CN 201920525347U CN 209896688 U CN209896688 U CN 209896688U
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- 238000002955 isolation Methods 0.000 title claims abstract description 30
- 230000009466 transformation Effects 0.000 claims abstract description 18
- 230000002457 bidirectional effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 31
- 238000002601 radiography Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model discloses a series-connection converter module with fault isolation function, which comprises an input port and an output port, wherein the series-connection converter module is configured to convert low-frequency alternating current input into high-frequency alternating current output; the input port is a low-frequency alternating current side, and the output port is a high-frequency alternating current side; the input port is connected with a first switch in parallel, and the output port is connected with a second switch in parallel; if the series current transformation module works normally, the first switch and the second switch are controlled to be in an off state; and if the series current transformation module detects the fault of the series current transformation module, controlling the first switch and the second switch to be in a conduction state, and isolating the fault. The utility model discloses when series connection conversion module detected self trouble, switch on the parallel switch of input port and output port, make its input port and output port be short circuit or bypass state to this keeps apart the trouble of series connection conversion module, avoids further the expansion of trouble or avoids because the trouble radiography of series connection conversion module makes a sound the work of other module circuit.
Description
Technical Field
The utility model belongs to the technical field of power electronics, concretely relates to series connection conversion module and converter with fault isolation function.
Background
The power electronic transformer is provided with a power electronic device which converts alternating voltage into direct current and then forms high-frequency alternating current output through a semiconductor switching device, an electronic element and a high-frequency transformer winding. The power electronic transformer comprises a series current transformation module which converts low-frequency alternating current into high-frequency alternating current. When a fault occurs in a series converter module, no fault isolation measure is provided in the prior art when the fault occurs in the series converter module. Due to the fact that fault isolation measures of the converter modules are lacked, faults are further enlarged, and unnecessary loss is caused to power electronic equipment, particularly to a power electronic transformer.
Disclosure of Invention
To the shortcoming of prior art, the utility model aims to provide a series connection conversion module and power electronic transformer with fault isolation function, through the switch of the equal parallel connection of input port and output port at series connection conversion module for when series connection conversion module detects self trouble, switch on the parallel switch of input port and output port, make its input port and output port be short circuit or bypass state, with this fault of keeping apart series connection conversion module. In addition, based on this conversion module the utility model discloses a power electronic transformer with fault isolation has still been provided.
In order to solve the above technical problem, the present invention provides a series converter module with fault isolation function, wherein the series converter module includes an input port and an output port, and the series converter module is configured to convert a low-frequency ac input into a high-frequency ac output; the input port is a low-frequency alternating current side, and the output port is a high-frequency alternating current side; the input port is connected with a first switch in parallel, and the output port is connected with a second switch in parallel; if the series current transformation module works normally, the first switch and the second switch are controlled to be in an off state; and if the series current transformation module detects the fault of the series current transformation module, controlling the first switch and the second switch to be in a conduction state, and isolating the fault.
Preferably, the first switch and the second switch are bidirectional switches.
Preferably, the bidirectional switch is a bidirectional thyristor, a mechanical switch, two anti-parallel unidirectional thyristors or two anti-parallel IGBTs.
A power electronic transformer comprising: the isolation transformer comprises n primary windings and n secondary windings, wherein n is a positive integer greater than or equal to 2; the high-voltage side of the power electronic transformer is configured such that the input ports of the n series-connected converter modules are connected in series; the n primary windings of the isolation transformer are respectively connected with the output ports of the n series current conversion modules in parallel one by one; and the n secondary windings of the isolation transformer are connected in series and then are coupled and connected to the low-voltage side of the power electronic transformer.
Preferably, the low voltage side is coupled to a low voltage active bridge having a dc output.
Preferably, in the high-voltage side, the input ports of n series-connected inverter modules are connected in series, and if the total voltage borne by the high-voltage side through series connection is Vin, the voltage u11 at the input port of each series-connected inverter module is equal to Vin/n; if the output voltage of the low-voltage side is Vs, the output voltage of the series current conversion module
Wherein
And the turn ratio of the primary winding to the secondary winding of the isolation transformer is obtained.
Preferably, if one of the series-connected converter modules fails, the first switch and the second switch are controlled to close the input port and the output port of the series-connected converter module in a short circuit manner, and the voltage of the input ports of the other series-connected converter modules which do not fail is equal to
Output port voltage of
Compared with the prior art, the utility model discloses following beneficial effect or advantage have at least: the utility model provides a series connection conversion module and power electronic transformer with trouble isolation function, at the switch of the equal parallel connection of input port and the output port of series connection conversion module, be used for when self trouble is detected to the series connection conversion module, switch on the parallel switch of input port and output port, make its input port and output port be short circuit or bypass state, keep apart the trouble of series connection conversion module with this, avoid the further expansion of trouble or avoid because the trouble radiography of series connection conversion module influences the work of other module circuit. In addition, based on this conversion module the utility model discloses still provide a power electronic transformer with fault isolation, and this power electronic transformer has used a plurality of conversion module establishes ties can self keep apart when having every conversion module of establishing ties and breaking down, avoids its trouble to cause the influence to other conversion module work of establishing ties, as long as input voltage still is in the operating range that the module set for, and entire system still normally works.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings;
fig. 1 is a series converter module with fault isolation according to an embodiment of the present invention;
fig. 2 is a block circuit of a series converter module with fault isolation according to an embodiment of the present invention;
fig. 3 is a power electronic transformer with fault isolation according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides a series connection converter module with fault isolation function, as shown in fig. 1, this series connection converter module includes input port and output port, the configuration of series connection converter module is for changing low frequency ac input into high frequency ac output; the input port is a low-frequency alternating current side, and the output port is a high-frequency alternating current side; the input port is connected with a first switch T11 in parallel, and the output port is connected with a second switch T12 in parallel; if the series converter module works normally, controlling the first switch T11 and the second switch T12 to be in an off state; and if the series module detects the self fault, controlling the first switch T11 and the second switch T12 to be in a conducting state, and isolating the fault.
The input voltage of the input port of the series current transformation module is u11, and the output voltage of the output port of the series current transformation module is u 12. In one embodiment, the first switch and the second switch are bidirectional switches, which may be bidirectional thyristors, bidirectional mechanical switches, or other switches with bidirectional on/off function, such as a bidirectional switch composed of two unidirectional thyristors or unidirectional thyristors connected in parallel in opposite directions, or a bidirectional switch composed of two IGBTs connected in parallel in opposite directions.
As shown in fig. 2, for the specific circuit structure of series converter module with fault isolation function provided by the embodiment of the present invention, include that the input port is connected with the input end of the rectifier circuit of series converter module through inductance L11, the rectifier circuit includes the full-bridge rectifier circuit that comprises switches S11, S12, S13 and S14, a filter capacitor C1 is connected in parallel to the output end of the rectifier circuit, and the output end of the rectifier circuit is connected through a full-bridge inverter circuit, the full-bridge inverter circuit includes by switches S15, S16, S17 and S18, wherein the output end of this inverter full-bridge circuit is connected through inductance L12 the output port of series converter module.
Another embodiment of the present invention provides a power electronic transformer, as shown in fig. 3, including: the transformer comprises a high-voltage side, a low-voltage side, n series current transformation modules and an isolation transformer, wherein the series current transformation modules are high-voltage AC/AC modules, the isolation transformer comprises n primary windings and n secondary windings, and n is a positive integer greater than or equal to 2; the high-voltage side of the power electronic transformer is configured such that the input ports of the n series-connected converter modules are connected in series; the n primary windings of the isolation transformer are respectively connected with the output ports of the n series current conversion modules in parallel one by one; and the n secondary windings of the isolation transformer are connected in series and then are coupled and connected to the low-voltage side of the power electronic transformer.
The low-voltage side is coupled and connected with a low-voltage active bridge, the low-voltage active bridge is provided with a direct current output end, the low-voltage active bridge comprises a rectifying circuit formed by switches Ss1, Ss3, Ss3 and Ss4, and the output end of the rectifying circuit outputs direct current voltage Vo through a parallel filter capacitor C0;
specifically, according to the above configuration of the power electronic transformer, the input ports of the n series-connected converter modules are connected in series on the high-voltage side of the power electronic transformer, and if the total voltage borne by the high-voltage side in series is Vin, the voltage u11 at the input port of each series-connected converter module is Vin/n; if the output voltage of the low-voltage side is Vs, the output voltage of the series current conversion module
WhereinAnd the turn ratio of the primary winding to the secondary winding of the isolation transformer is obtained.
If one of the series current transformation modules fails, the first switch and the second switch are controlled to close the input port and the output port of the series current transformation module in a short circuit mode, and the voltages of the input ports of the other series current transformation modules which do not fail are equal to
Output port voltage of
Compared with the prior art, the utility model discloses following beneficial effect or advantage have at least: the utility model provides a series connection conversion module and power electronic transformer with trouble isolation function, at the switch of the equal parallel connection of input port and the output port of series connection conversion module, be used for when self trouble is detected to the series connection conversion module, switch on the parallel switch of input port and output port, make its input port and output port be short circuit or bypass state, keep apart the trouble of series connection conversion module with this, avoid the further expansion of trouble or avoid because the trouble radiography of series connection conversion module influences the work of other module circuit. In addition, based on this conversion module the utility model discloses still provide a power electronic transformer with fault isolation, and this power electronic transformer has used a plurality of conversion module establishes ties can self keep apart when having every conversion module of establishing ties and breaking down, avoids its trouble to cause the influence to other conversion module work of establishing ties, as long as input voltage still is in the operating range that the module set for, and entire system still normally works.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (3)
1. A series current transformation module with fault isolation function is characterized in that: the series converter module comprises an input port and an output port, and is configured to convert a low-frequency alternating current input into a high-frequency alternating current output; the input port is a low-frequency alternating current side, and the output port is a high-frequency alternating current side; the input port is connected with a first switch in parallel, and the output port is connected with a second switch in parallel; if the series current transformation module works normally, the first switch and the second switch are controlled to be in an off state; and if the series current transformation module detects the fault of the series current transformation module, controlling the first switch and the second switch to be in a conduction state, and isolating the fault.
2. The series converter module with fault isolation as claimed in claim 1, wherein: the first switch and the second switch are bidirectional switches.
3. The series converter module with fault isolation as claimed in claim 2, wherein: the bidirectional switch is a bidirectional thyristor, a mechanical switch, two unidirectional thyristors in inverse parallel connection or two IGBT in inverse parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920525347.6U CN209896688U (en) | 2019-04-18 | 2019-04-18 | Series converter module with fault isolation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920525347.6U CN209896688U (en) | 2019-04-18 | 2019-04-18 | Series converter module with fault isolation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209896688U true CN209896688U (en) | 2020-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920525347.6U Withdrawn - After Issue CN209896688U (en) | 2019-04-18 | 2019-04-18 | Series converter module with fault isolation function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011280A (en) * | 2019-04-18 | 2019-07-12 | 国网江苏省电力有限公司 | A kind of series connection unsteady flow module and electric power electric transformer with Fault Isolation function |
-
2019
- 2019-04-18 CN CN201920525347.6U patent/CN209896688U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011280A (en) * | 2019-04-18 | 2019-07-12 | 国网江苏省电力有限公司 | A kind of series connection unsteady flow module and electric power electric transformer with Fault Isolation function |
| CN110011280B (en) * | 2019-04-18 | 2024-03-15 | 国网江苏省电力有限公司 | Series converter module with fault isolation function and power electronic transformer |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200103 Effective date of abandoning: 20240315 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200103 Effective date of abandoning: 20240315 |