CN108880201B - High-voltage frequency converter - Google Patents
High-voltage frequency converter Download PDFInfo
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- CN108880201B CN108880201B CN201811076674.4A CN201811076674A CN108880201B CN 108880201 B CN108880201 B CN 108880201B CN 201811076674 A CN201811076674 A CN 201811076674A CN 108880201 B CN108880201 B CN 108880201B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
Abstract
The present invention provides a high voltage frequency converter comprising: the power unit comprises a transformer and a plurality of power units arranged above the transformer to form three-phase output, wherein each phase output in the three-phase output corresponds to at least two power units which are mutually connected in series, and the power units are arranged in an upper layer and a lower layer; at least two power units corresponding to a first phase output are sequentially arranged on an upper layer according to a serial sequence, at least two power units corresponding to a second phase output are sequentially arranged on a lower layer according to a serial sequence, and the power units connected to an external load in the first phase output and the power units connected to the load in the second phase output are positioned at the same side end; at least two power units corresponding to third phase output are arranged at the other side ends of the upper layer and the lower layer. The scheme can lead the internal wiring of the high-voltage frequency converter to be more convenient.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a high-voltage frequency converter.
Background
The high-voltage frequency converter is an electric energy control device which converts a power frequency power supply into another frequency by utilizing the on-off action of a power semiconductor device, and is widely applied to the frequency conversion and speed regulation of high-voltage motors in a plurality of fields such as metallurgy, mine, electric power, petrifaction, water supply and drainage, central air-conditioning and the like. The high-voltage frequency converter mainly comprises a transformer part and a power unit part, and is formed by cascading power units with different numbers according to different grades of output voltage, wherein the higher the output voltage is, the more the number of the power units is, and the volume of the high-voltage frequency converter is increased along with the increase of the number of the power units.
Currently, in order to avoid an increase in the footprint caused by an increase in the volume of the high voltage frequency converter, the transformer section and the power unit section are typically arranged one above the other.
For the high-voltage frequency converter with the current transformer part and the power unit part arranged up and down, the internal wiring of the high-voltage frequency converter is inconvenient because the power units are not in a simple single-row structure.
Disclosure of Invention
The high-voltage frequency converter provided by the embodiment of the invention can facilitate the internal wiring.
The high-voltage frequency converter provided by the embodiment of the invention comprises: the transformer and the power units are arranged above the transformer to form three-phase output, each phase output in the three-phase output corresponds to at least two power units which are mutually connected in series, wherein,
each power unit is arranged in an upper layer and a lower layer;
at least two power units corresponding to a first phase output are sequentially arranged on an upper layer according to a serial sequence, at least two power units corresponding to a second phase output are sequentially arranged on a lower layer according to a serial sequence, and the power units connected to an external load in the first phase output and the power units connected to the load in the second phase output are positioned at the same side end;
at least two power units corresponding to third phase output are arranged at the other side ends of the upper layer and the lower layer.
Optionally, the first phase output, the second phase output, and the third phase output correspond to a phase, B phase, and C phase, respectively.
Optionally, the first phase output, the second phase output, and the third phase output correspond to a phase, C phase, and B phase, respectively.
Optionally, the first phase output, the second phase output, and the third phase output correspond to a B phase, an a phase, and a C phase, respectively.
Optionally, the first phase output, the second phase output, and the third phase output correspond to a B phase, a C phase, and an a phase, respectively.
Optionally, the first phase output, the second phase output, and the third phase output correspond to a C phase, an a phase, and a B phase, respectively.
Optionally, the first phase output, the second phase output, and the third phase output correspond to a C phase, a B phase, and an a phase, respectively.
Optionally, each of the three-phase outputs corresponds to 5 of the power cells connected in series with each other.
Alternatively, the process may be carried out in a single-stage,
the power units of the first stage to the third stage corresponding to the third phase output are arranged on the upper layer in series sequence, and the power units of the fourth stage and the fifth stage corresponding to the third phase output are arranged on the lower layer;
the power unit of the first stage corresponding to the third phase output is adjacent to the power unit of the first stage corresponding to the first phase output, and a gap is formed between the power unit of the fifth stage corresponding to the third phase output and the power unit of the first stage corresponding to the second phase output.
Alternatively, the process may be carried out in a single-stage,
the power units of the first stage to the third stage corresponding to the third phase output are arranged on the upper layer in series sequence, and the power units of the fourth stage and the fifth stage corresponding to the third phase output are arranged on the lower layer;
and a third stage of the power unit corresponding to the third phase output is adjacent to a first stage of the power unit corresponding to the first phase output, and a gap is formed between a fifth stage of the power unit corresponding to the third phase output and the first stage of the power unit corresponding to the second phase output.
Alternatively, the process may be carried out in a single-stage,
the power units of the first stage to the third stage corresponding to the third phase output are arranged on the lower layer in series sequence, and the power units of the fourth stage and the fifth stage corresponding to the third phase output are arranged on the upper layer;
the power unit of the first stage corresponding to the third phase output is adjacent to the power unit of the first stage corresponding to the second phase output, and a gap is formed between the power unit of the fifth stage corresponding to the third phase output and the power unit of the first stage corresponding to the first phase output.
Alternatively, the process may be carried out in a single-stage,
the power units of the first stage to the third stage corresponding to the third phase output are arranged on the lower layer in series sequence, and the power units of the fourth stage and the fifth stage corresponding to the third phase output are arranged on the upper layer;
and a third stage of the power unit corresponding to the third phase output is adjacent to a first stage of the power unit corresponding to the second phase output, and a gap is formed between a fifth stage of the power unit corresponding to the third phase output and the first stage of the power unit corresponding to the first phase output.
Alternatively, the process may be carried out in a single-stage,
the power units of the first stage and the second stage corresponding to the third phase output are arranged on the lower layer, and the power units of the third stage to the fifth stage corresponding to the third phase output are arranged on the upper layer;
and a fifth stage of the power unit corresponding to the third phase output is adjacent to the first stage of the power unit corresponding to the first phase output, and a gap is reserved between the first stage of the power unit corresponding to the third phase output and the first stage of the power unit corresponding to the second phase output.
Alternatively, the process may be carried out in a single-stage,
the high voltage frequency converter further includes: a controller and at least one fan;
the controller and the transformer are arranged below each power unit in parallel;
the at least one fan is arranged above each power unit.
According to the high-voltage frequency converter provided by the embodiment of the invention, the power units corresponding to the first phase output and the second phase output are sequentially arranged according to the serial sequence, so that the power units are more convenient to connect; because the power unit for connecting the load in the first phase output and the power unit for connecting the load in the second phase output are positioned at the same side end, the load can be conveniently connected by leading the power unit for connecting the load in the third phase output to the same side end through only one wire; because each power unit corresponding to the first phase output and the second phase output is sequentially arranged in series, the power units connected with the neutral points in the first phase output and the second phase output are aligned up and down, and the connection of the neutral points is facilitated. By combining the above points, the high-voltage frequency converter provided by the embodiment of the invention can facilitate connection among power units, connection of neutral points and connection to load output lines, so that internal wiring of the high-voltage frequency converter is more convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a high-voltage inverter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first power cell layout according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a second power cell layout according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of a third power cell layout according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a fourth power cell layout provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a fifth power cell layout provided by an embodiment of the present invention;
fig. 7 is a schematic diagram of another high-voltage inverter according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
As shown in fig. 1, one embodiment of the present invention provides a high voltage inverter, including: a transformer 10 and a plurality of power cells 20 arranged above the transformer 10, which constitute three-phase outputs, each of the three-phase outputs corresponding to at least two power cells 20 connected in series with each other, wherein,
each power unit 20 is arranged in two layers up and down;
at least two power units 20 corresponding to the first phase output 201 are sequentially arranged on the upper layer according to the serial sequence, at least two power units 20 corresponding to the second phase output 202 are sequentially arranged on the lower layer according to the serial sequence, and the power unit 20 connected to the load in the first phase output 201 and the power unit 20 connected to the load in the second phase output 202 are positioned at the same side end;
at least two power cells 20 corresponding to the third phase output 203 are disposed at the other side ends of the upper and lower layers.
According to the high-voltage frequency converter provided by the embodiment of the invention, the power units corresponding to the first phase output and the second phase output are sequentially arranged according to the serial sequence, so that the power units are more convenient to connect; because the power unit for connecting the load in the first phase output and the power unit for connecting the load in the second phase output are positioned at the same side end, the load can be conveniently connected by leading the power unit for connecting the load in the third phase output to the same side end through only one wire; because each power unit corresponding to the first phase output and the second phase output is sequentially arranged in series, the power units connected with the neutral points in the first phase output and the second phase output are aligned up and down, and the connection of the neutral points is facilitated. By combining the above points, the high-voltage frequency converter provided by the embodiment of the invention can facilitate connection among power units, connection of neutral points and connection to load output lines, so that internal wiring of the high-voltage frequency converter is more convenient.
Optionally, the three-phase outputs of the high-voltage inverter are a phase, a B phase and a C phase, wherein the a phase voltage is 120 ° ahead of the B phase voltage, the B phase voltage is 120 ° ahead of the C phase voltage, and the C phase voltage is 120 ° ahead of the a phase voltage, and on the basis of the high-voltage inverter shown in fig. 1, the correspondence between the three-phase outputs and the A, B, C phase may be any one of 6 correspondence relationships shown in table 1 below.
TABLE 1
| First phase output 201 | Second phase output 202 | Third phase output 203 | |
| Correspondence relation 1 | Phase A | Phase B | Phase C |
| Correspondence 2 | Phase A | Phase C | Phase B |
| Correspondence 3 | Phase B | Phase A | Phase C |
| Correspondence 4 | Phase B | Phase C | Phase A |
| Correspondence 5 | Phase C | Phase A | Phase B |
| Correspondence 6 | Phase C | Phase B | Phase A |
In the embodiment of the invention, the first phase output, the second phase output and the third phase output correspond to the A phase, the B phase and the C phase of the frequency converter, and the corresponding relation among the first phase output, the second phase output and the third phase output and the A phase, the B phase and the C phase can be transformed at will according to the requirements in the actual service implementation process, and only the three-phase output is required to be ensured to correspond to the A phase, the B phase and the C phase, so that the frequency converter can be suitable for the requirements of different users, and the applicability of the high-voltage frequency converter is improved.
Alternatively, on the basis of the high-voltage frequency converter shown in fig. 1, each phase output of the high-voltage frequency converter may correspond to 5 power units 20 connected in series with each other, that is, the high-voltage frequency converter includes 15 power units 20 in total.
When the number of the power units included in the high-voltage frequency converter is large, the arrangement of the upper layer and the lower layer of each power unit can lead to the increase of the width of the high-voltage frequency converter, and when the number of the power units included in the high-voltage frequency converter is small, each power unit can be arranged on one layer to reduce the height of the high-voltage frequency converter. According to the size of the transformer and the size of the power units in the high-voltage frequency converter, the high-voltage frequency converter comprising 15 power units is suitable for a layout scheme of an upper layer and a lower layer of the power units, and the width of the high-voltage frequency converter can be prevented from being increased while the high-voltage frequency converter is ensured not to be ultrahigh.
Optionally, for the high-voltage frequency converter including 15 power units, according to the layout mode difference of 5 power units corresponding to the third phase output, the power units are arranged in an upper-lower layer structure, and multiple implementation modes are provided. In the following, 5 power cell layout modes are provided for example, where the first phase output corresponds to the C phase, the second phase output corresponds to the B phase, and the third phase output corresponds to the a phase.
Layout mode one:
as shown in fig. 2, the power cells C1 to C5 corresponding to the first phase output 201 are sequentially arranged in the upper layer in the series order, the power cells B1 to B5 corresponding to the second phase output 202 are sequentially arranged in the lower layer in the series order, and the fifth stage power cell C5 corresponding to the first phase output 201 for connecting a load and the fifth stage power cell B5 corresponding to the second phase output 202 for connecting a load are both positioned on the right side of the drawing. The first-stage power unit A1, the second-stage power unit A2 and the third-stage power unit A3 corresponding to the third-phase output 203 are sequentially arranged on the upper layer according to the serial sequence, the fourth-stage power unit A4 and the fifth-stage power unit A5 corresponding to the third-phase output 203 are arranged on the lower layer, the power units A1 to A5 are positioned on the left side in the drawing, the power unit A1 is adjacent to the power unit C1, and a gap is reserved between the power unit A5 and the power unit B1.
First, each power unit corresponding to the first phase output 201 and each power unit corresponding to the second phase output 202 are distributed in an upper layer and a lower layer, and are sequentially arranged according to a serial sequence, so that each power unit corresponding to the first phase output 201 and each power unit corresponding to the second phase output 202 can be conveniently connected.
Secondly, the power unit A1, the power unit B1 and the power unit C1 corresponding to the neutral point are arranged in a concentrated mode, so that the connection of the intermediate point is more convenient.
Thirdly, the power unit A3 and the power unit A4 corresponding to the third phase output 203 are respectively located at the upper layer and the lower layer, but the power unit A3 and the power unit A4 are aligned up and down, and only a short wire is needed to connect the power unit A3 and the power unit A4, so that each power unit corresponding to the third phase output 203 can be conveniently connected.
Fourth, there is the clearance between power unit A5 and the power unit B1, and this clearance provides the distance for alternate insulation on the one hand, and on the other hand this clearance can provide sufficient space for the connecting cable between transformer to each power unit, need not to set up the space of walking independently for the connecting cable between transformer to each power unit to can reduce high-voltage inverter's width.
Fifthly, the power unit B5 and the power unit C5 are arranged on the same side of the high-voltage frequency converter, and the output end of the high-voltage frequency converter can be conveniently connected to an external load only by leading the power unit A5 together through a group of wires.
Layout mode II:
as shown in fig. 3, the power cells C1 to C5 corresponding to the first phase output 201 are sequentially arranged in the upper layer in the series order, the power cells B1 to B5 corresponding to the second phase output 202 are sequentially arranged in the lower layer in the series order, and the fifth stage power cell C5 corresponding to the first phase output 201 for connecting a load and the fifth stage power cell B5 corresponding to the second phase output 202 for connecting a load are both positioned on the right side of the drawing. The first-stage power unit A1, the second-stage power unit A2 and the third-stage power unit A3 corresponding to the third-phase output 203 are sequentially arranged on the upper layer according to the serial sequence, the fourth-stage power unit A4 and the fifth-stage power unit A5 corresponding to the third-phase output 203 are arranged on the lower layer, the power units A1 to A5 are positioned on the left side in the drawing, the power unit A3 is adjacent to the power unit C1, and the power unit A5 is adjacent to the power unit B1 with a gap therebetween.
First, the arrangement of the first phase output 201 and the second phase output 202 in the second arrangement is the same as that of the first arrangement, so that the power units corresponding to the first phase output 201 and the power units corresponding to the second phase output 202 can be conveniently connected. In addition, a gap is arranged between the power unit A5 and the power unit B1, so that on one hand, the gap provides a distance for interphase insulation, on the other hand, the gap can provide sufficient space for connecting cables between the transformer and each power unit, and no wiring space is required to be independently arranged for the connecting cables between the transformer and each power unit, so that the width of the high-voltage frequency converter can be reduced.
Second, since the power unit A1 and the power unit C1 are spaced apart from each other by the power unit A2 and the power unit A3, the neutral point connection requires a set of longer cables to connect the power unit A1 and the power unit C1, and a set of longer cables to connect the power unit A3 located at the upper and lower layers, respectively, and the power unit A4. Although the connection cables between the power cells A1 and C1 and between the power cells A3 and A4 are long, the connection between the power cells corresponding to the third phase output 203 may be made to coincide with the connection order of the power cells corresponding to the first phase output 201 and the second phase output 202 in the order from left to right. The connection sequence of the power units can be unified, the occurrence probability of connection error events of the power units can be reduced, and the high-voltage frequency converter can be maintained more conveniently.
And a layout mode III:
as shown in fig. 4, the power cells C1 to C5 corresponding to the first phase output 201 are sequentially arranged in the upper layer in the series order, the power cells B1 to B5 corresponding to the second phase output 202 are sequentially arranged in the lower layer in the series order, and the fifth stage power cell C5 corresponding to the first phase output 201 for connecting a load and the fifth stage power cell B5 corresponding to the second phase output 202 for connecting a load by a user are both positioned on the right side of the drawing. The first-stage power unit A1, the second-stage power unit A2 and the third-stage power unit A3 corresponding to the third-phase output 203 are sequentially arranged on the lower layer according to the serial sequence, the fourth-stage power unit A4 and the fifth-stage power unit A5 corresponding to the third-phase output 203 are arranged on the upper layer, the power units A1 to A5 are positioned on the left side in the drawing, the power unit A1 is adjacent to the power unit B1, and the power unit A5 is adjacent to the power unit C1 with a gap therebetween.
Compared with the first layout mode, the third layout mode arranges the power units A1 to A3 corresponding to the third phase output 203 on the lower layer, and arranges the power unit A4 and the power unit A5 on the upper layer, so that the position of the vacant power unit in the layout is located on the upper layer, and at this time, a wiring space is required to be separately set for a connection cable between the transformer and each power unit, so that the overall width of the high-voltage frequency converter is slightly increased, but the convenience of connection between each power unit and neutral point connection in the high-voltage frequency converter can be ensured, and the output end of the high-voltage frequency converter can be conveniently connected to a load.
And a layout mode IV:
as shown in fig. 5, the power cells C1 to C5 corresponding to the first phase output 201 are sequentially arranged in the upper layer in the series order, the power cells B1 to B5 corresponding to the second phase output 202 are sequentially arranged in the lower layer in the series order, and the fifth stage power cell C5 corresponding to the first phase output 201 for connecting a load and the fifth stage power cell B5 corresponding to the second phase output 202 for connecting a load by a user are both positioned on the right side of the drawing. The first-stage power unit A1, the second-stage power unit A2 and the third-stage power unit A3 corresponding to the third-phase output 203 are sequentially arranged on the lower layer according to the serial sequence, the fourth-stage power unit A4 and the fifth-stage power unit A5 corresponding to the third-phase output 203 are arranged on the upper layer, the power units A1 to A5 are positioned on the left side in the drawing, the power unit A3 is adjacent to the power unit B1, and the power unit A5 is adjacent to the power unit C1 with a gap therebetween.
In comparison with the layout mode two, the layout mode four arranges the power cells A1 to A3 corresponding to the third phase output 203 in the lower layer, and arranges the power cell A4 and the power cell A5 in the upper layer, and connects the power cells A1 to A5 in the order from left to right as well. Since the third phase output 203 is only arranged with the power unit A4 and the power unit A5 on the upper layer, the position of the vacant power unit in the layout is located on the upper layer, and at this time, a wiring space needs to be separately set for the connection cable between the transformer and each power unit, which can slightly increase the overall width of the high-voltage frequency converter, but can also promote the connection between each power unit and the connection of the neutral point in the high-voltage frequency converter.
Layout mode five:
as shown in fig. 6, the power cells C1 to C5 corresponding to the first phase output 201 are sequentially arranged in the upper layer in the series order, the power cells B1 to B5 corresponding to the second phase output 202 are sequentially arranged in the lower layer in the series order, and the fifth stage power cell C5 corresponding to the first phase output 201 for connecting a load and the fifth stage power cell B5 corresponding to the second phase output 202 for connecting a load by a user are both positioned on the right side of the drawing. The first-stage power unit A1 and the second-stage power unit A2 corresponding to the third-phase output 203 are arranged at the lower layer, the third-stage power units A3 to A5 corresponding to the third-phase output 203 are arranged at the upper layer in series order, the power units A1 to A5 are positioned at the left side in the figure, the power unit A5 is adjacent to the power unit C1, and the power unit A1 is adjacent to the power unit B1 with a gap therebetween.
Compared with the layout mode IV, the layout mode IV has the characteristic of convenient connection between the power units and neutral point connection, besides, the position of the power unit lacking in the layout mode V is positioned at the lower layer, the gap can provide sufficient space for connecting cables between the transformer and the power units, and wiring space is not required to be independently arranged for the connecting cables between the transformer and the power units, so that the width of the high-voltage frequency converter can be reduced.
In fig. 1 to 6, the connection line between the power units represents a cable or a conductor line path connected between the power units. In addition, the 5 layouts provided in the above embodiments are only 5 realizations of the present invention, and all the layouts of the power units, for example, in other layouts, the first stage power unit A1 and the second stage power unit A2 corresponding to the third phase output 203 may be disposed on the upper layer, and the third stage power units A3 to A5 corresponding to the third phase output 203 may be sequentially disposed on the lower layer according to the serial order.
Optionally, in addition to the high-voltage frequency converter provided in the foregoing embodiments, as shown in fig. 7, the high-voltage frequency converter further includes: a controller 30 and at least one fan 40;
the controller 30 and the transformer 10 are disposed in parallel below the respective power units 20, and the respective fans 40 are disposed above the respective power units 20.
In the embodiment of the present invention, the controller 30 is disposed below each power unit 20 in parallel with the transformer 10, and each fan 40 is disposed above each power unit 20, so that the width of the high-voltage frequency converter can be reduced, and the occupied area of the high-voltage frequency converter can be reduced.
Specifically, the controller 30 is used to control the operation of each power unit 20 and the transformer 10, and the fan 40 is used to fan the transformer 10, each power unit 20, and the controller 30.
It should be noted that, the high-voltage inverter includes a cabinet body, a layered partition board is disposed in the cabinet body, and the transformer 10, each power unit 20, the controller 30, and each fan 40 are all installed on the cabinet body of the high-voltage inverter.
The high-voltage frequency converter provided by the invention has at least the following beneficial effects:
1. in the high-voltage frequency converter provided by the invention, the power units corresponding to the first phase output and the second phase output are sequentially arranged according to the serial sequence, so that the power units are more convenient to connect; because the power unit for connecting the load in the first phase output and the power unit for connecting the load in the second phase output are positioned at the same side end, the load can be conveniently connected by leading the power unit for connecting the load in the third phase output to the same side end through only one wire; because each power unit corresponding to the first phase output and the second phase output is sequentially arranged in series, the power units connected with the neutral points in the first phase output and the second phase output are aligned up and down, and the connection of the neutral points is facilitated. By combining the above points, the high-voltage frequency converter provided by the embodiment of the invention can facilitate connection among power units, connection of neutral points and connection to load output lines, so that internal wiring of the high-voltage frequency converter is more convenient.
2. In the high-voltage frequency converter provided by the invention, the first phase output, the second phase output and the third phase output correspond to the A phase, the B phase and the C phase of the frequency converter, and according to the requirements in the actual service implementation process, the corresponding relation among the first phase output, the second phase output and the third phase output and the A phase, the B phase and the C phase can be transformed at will, and only the three-phase output is required to be ensured to correspond to the A phase, the B phase and the C phase, so that the high-voltage frequency converter can be suitable for the requirements of different users, and the applicability of the high-voltage frequency converter is improved.
3. According to the high-voltage frequency converter provided by the invention, each power unit in the high-voltage frequency converter has a plurality of different layout modes according to different arrangement modes of each power unit corresponding to the third phase output, each layout mode can ensure convenience of connection and neutral point connection between each power unit in the high-voltage frequency converter, the output end of the high-voltage frequency converter can be conveniently connected with an external load, and the different layout modes can meet individual requirements of different users, so that the use satisfaction of the users can be improved.
4. In the high-voltage frequency converter provided by the invention, the controller and the transformer included in the high-voltage frequency converter are arranged below each power unit in parallel, and meanwhile, each fan included in the high-voltage frequency converter is arranged above each power unit, so that on one hand, the increase of the whole width of the high-voltage frequency converter can be avoided, the high-voltage frequency converter is ensured to have smaller occupied area, and on the other hand, the heat dissipation effect of the whole high-voltage frequency converter can be improved.
It is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article or apparatus that comprises the element.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (3)
1. The high-voltage frequency converter is characterized by comprising: a transformer (10) and a plurality of power units (20) arranged above the transformer (10) to form three-phase outputs (201, 202, 203), wherein each phase output in the three-phase outputs (201, 202, 203) corresponds to at least two power units (20) which are mutually connected in series,
each power unit (20) is arranged in an upper layer and a lower layer;
at least two power units (20) corresponding to a first phase output (201) are sequentially arranged on an upper layer in a serial sequence, at least two power units (20) corresponding to a second phase output (202) are sequentially arranged on a lower layer in a serial sequence, and the power units (20) connected to an external load in the first phase output (201) and the power units (20) connected to the load in the second phase output (202) are positioned at the same side end;
at least two power units (20) corresponding to third phase outputs (203) are arranged at the other side ends of the upper layer and the lower layer;
wherein each of the three phase outputs (201, 202, 203) corresponds to 5 of the power cells (20) being connected in series with each other;
wherein the power units (20) of the first to third stages corresponding to the third phase output (203) are arranged in the upper layer in series order, and the power units (20) of the fourth and fifth stages corresponding to the third phase output (203) are arranged in the lower layer; the power unit (20) of the first stage corresponding to the third phase output (203) is adjacent to and connected with the power unit (20) of the first stage corresponding to the first phase output, and a gap is formed between the power unit (20) of the fifth stage corresponding to the third phase output (203) and the power unit (20) of the first stage corresponding to the second phase output (202);
alternatively, the power units (20) of the first to third stages corresponding to the third phase output are arranged in the upper layer in series order, and the power units (20) of the fourth and fifth stages corresponding to the third phase output are arranged in the lower layer; the third-stage power unit (20) corresponding to the third phase output is adjacent to the first-stage power unit (20) corresponding to the first phase output, and a gap is formed between the fifth-stage power unit (20) corresponding to the third phase output and the first-stage power unit (20) corresponding to the second phase output; the power unit of the first stage corresponding to the third phase output is connected with the power unit of the first stage corresponding to the first phase output;
alternatively, the power units (20) of the first to third stages corresponding to the third phase output are arranged in the lower layer in series order, and the power units (20) of the fourth and fifth stages corresponding to the third phase output are arranged in the upper layer; the power unit (20) of the first stage corresponding to the third phase output is adjacent to and connected with the power unit (20) of the first stage corresponding to the second phase output, and a gap is formed between the power unit (20) of the fifth stage corresponding to the third phase output and the power unit (20) of the first stage corresponding to the first phase output;
alternatively, the power units (20) of the first to third stages corresponding to the third phase output are arranged in the lower layer in series order, and the power units (20) of the fourth and fifth stages corresponding to the third phase output are arranged in the upper layer; the third-stage power unit (20) corresponding to the third phase output is adjacent to the first-stage power unit (20) corresponding to the second phase output, and a gap is formed between the fifth-stage power unit (20) corresponding to the third phase output and the first-stage power unit (20) corresponding to the first phase output; the power unit of the first stage corresponding to the third phase output is connected with the power unit of the first stage corresponding to the second phase output;
alternatively, the power units (20) of the first and second stages corresponding to the third phase output are arranged at the lower layer, and the power units (20) of the third to fifth stages corresponding to the third phase output are arranged at the upper layer;
the fifth stage of the power unit (20) corresponding to the third phase output is adjacent to the first stage of the power unit (20) corresponding to the first phase output, a gap is reserved between the second stage of the power unit corresponding to the third phase output and the first stage of the power unit (20) corresponding to the second phase output, and the first stage of the power unit corresponding to the third phase output is connected with the first stage of the power unit (20) corresponding to the second phase output.
2. The high voltage inverter according to claim 1, wherein,
-the first phase output (201), the second phase output (202) and the third phase output (203) correspond to a phase, B phase and C phase respectively;
or,
-the first phase output (201), the second phase output (202) and the third phase output (203) correspond to a phase, C phase and B phase respectively;
or,
-the first phase output (201), the second phase output (202) and the third phase output (203) correspond to a B phase, an a phase and a C phase, respectively;
or,
-the first phase output (201), the second phase output (202) and the third phase output (203) correspond to a B phase, a C phase and an a phase, respectively;
or,
-the first phase output (201), the second phase output (202) and the third phase output (203) correspond to C-phase, a-phase and B-phase respectively;
or,
the first phase output (201), the second phase output (202) and the third phase output (203) correspond to a C phase, a B phase and an a phase, respectively.
3. The high voltage inverter according to any one of claims 1 to 2, further comprising: a controller (30) and at least one fan (40);
the controller (30) and the transformer (10) are arranged below the power units (20) in parallel;
the at least one fan (40) is arranged above each power unit (20).
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| CN101431290A (en) * | 2008-12-15 | 2009-05-13 | 株洲变流技术国家工程研究中心有限公司 | Optical fiber connecting method for cascade type medium-high voltage frequency convertor |
| DE102009031574A1 (en) * | 2009-06-30 | 2011-01-05 | Siemens Aktiengesellschaft | Construction of a multi-level converter of the electric power supply |
| CN102142779A (en) * | 2011-03-15 | 2011-08-03 | 荣信电力电子股份有限公司 | Novel transformer test power supply |
| CN203243213U (en) * | 2013-04-22 | 2013-10-16 | 西门子（上海）电气传动设备有限公司 | High-voltage frequency converter |
| CN206442278U (en) * | 2016-12-23 | 2017-08-25 | 西门子（上海）电气传动设备有限公司 | Cascade connection type frequency converter |
| CN208589911U (en) * | 2018-09-14 | 2019-03-08 | 西门子（上海）电气传动设备有限公司 | High-voltage frequency converter |
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| CN101431290A (en) * | 2008-12-15 | 2009-05-13 | 株洲变流技术国家工程研究中心有限公司 | Optical fiber connecting method for cascade type medium-high voltage frequency convertor |
| DE102009031574A1 (en) * | 2009-06-30 | 2011-01-05 | Siemens Aktiengesellschaft | Construction of a multi-level converter of the electric power supply |
| CN102142779A (en) * | 2011-03-15 | 2011-08-03 | 荣信电力电子股份有限公司 | Novel transformer test power supply |
| CN203243213U (en) * | 2013-04-22 | 2013-10-16 | 西门子（上海）电气传动设备有限公司 | High-voltage frequency converter |
| CN206442278U (en) * | 2016-12-23 | 2017-08-25 | 西门子（上海）电气传动设备有限公司 | Cascade connection type frequency converter |
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Address after: 200137 No.460, Gaoxiang Ring Road, Gaodong Industrial Park, Pudong New Area, Shanghai Patentee after: Yinmengda (Shanghai) Electrical Transmission Equipment Co.,Ltd. Country or region after: China Address before: 200137 No.460, Gaoxiang Ring Road, Gaodong Industrial Park, Pudong New Area, Shanghai Patentee before: SIEMENS ELECTRICAL DRIVES (SHANGHAI) Ltd. Country or region before: China |