CN115395805A - Direct-current power supply system based on phase-shifting transformer and control method - Google Patents
Direct-current power supply system based on phase-shifting transformer and control method Download PDFInfo
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- CN115395805A CN115395805A CN202210995901.3A CN202210995901A CN115395805A CN 115395805 A CN115395805 A CN 115395805A CN 202210995901 A CN202210995901 A CN 202210995901A CN 115395805 A CN115395805 A CN 115395805A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
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Abstract
The invention relates to the technical field of power supply control, in particular to a direct current power supply system based on a phase-shifting transformer and a power supply control method. The system comprises: a phase-shifting transformer comprising n secondary windings; n alternating current-direct current conversion modules; the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the alternating current and direct current conversion module comprises n rectification modules; the rectifier modules in the alternating current-direct current conversion modules are connected in parallel to form m direct current buses; the m direct current buses are respectively connected with m loads; wherein n and m are positive integers.
Description
Technical Field
The invention relates to the technical field of power supply control, in particular to a direct current power supply system based on a phase-shifting transformer and a power supply control method.
Background
Along with the large-scale application of a Panama power supply system in a data center, the application of a phase-shifting transformer in a direct-current power supply system is more and more extensive, and if the secondary side winding of the phase-shifting transformer is unbalanced in load, the transformer can generate heat locally, and the insulation can be broken down seriously or even, so that the secondary side winding is short-circuited. Referring to fig. 1, in a dc power supply mode in the prior art, the outputs of the secondary side phase shift windings (1, 2) of the phase shift transformer are connected in parallel to form a dc bus for supplying power to the load 1. The output of the secondary side phase-shift windings (3, 4) of the phase-shift transformer is connected in parallel with the direct current side rectified by the rectifier module to form a section of direct current bus for supplying power to the load 2. If the load 2 does not work, the single load 1 works, and the energy generated on the winding corresponding to the load 2 cannot be consumed and is converted into heat due to the action of the magnetic field. Therefore, in the prior art, the requirement on the insulation of the transformer is high, and meanwhile, because the number of the secondary side windings is large and the capacity of a single winding is small, even if a part of the windings are short-circuited, the short-circuit current mapped to the primary side is small, the action of a protection device on the primary side cannot be triggered, and the accident is enlarged.
It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure provides a phase-shifting transformer-based dc power supply system and a power supply control method applied to the phase-shifting transformer-based dc power supply system, which can prevent the phase-shifting transformer from generating heat locally due to uneven secondary side loading.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows, or in part will be obvious from the description, or may be learned by practice of the disclosure.
According to a first aspect of the present disclosure, there is provided a phase-shifting transformer based dc power supply system, comprising:
a phase-shifting transformer comprising n secondary windings; and (c) a second step of,
n alternating current-direct current conversion modules;
the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the alternating current and direct current conversion module comprises n rectification modules;
the rectification modules in the alternating current-direct current conversion modules are connected in parallel to form m direct current buses; the m direct current buses are respectively connected with m loads; wherein n and m are positive integers.
According to a second aspect of the present disclosure, there is provided a power supply control method, the method including:
configuring the number of the alternating current-direct current conversion modules according to the number of the secondary windings in the phase-shifting transformer; the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the number of the rectifier modules contained in each alternating current-direct current conversion module is n; and
matching rectification modules in the alternating current-direct current conversion modules according to the size of the load, and connecting the rectification modules matched in the alternating current-direct current conversion modules in parallel to form m direct current buses, wherein the m direct current buses are respectively connected with the m loads; wherein n and m are positive integers.
The embodiment of the present disclosure provides a dc power supply system based on a phase-shifting transformer, which configures a plurality of rectifier modules in an ac-dc conversion module, and selects at least one rectifier module in each ac-dc conversion module based on the size of a load, and then selects each rectifier module to be connected in parallel to form a dc bus, and connects the dc bus with the load, thereby realizing parallel output between each ac-dc conversion module at a dc output side, and thus effectively avoiding local heating of the phase-shifting transformer caused by uneven secondary side loading, better protecting the transformer, and prolonging the service life.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 is a schematic diagram of a prior art DC power supply for a multi-pulse phase-shifting transformer;
fig. 2 is a schematic diagram of a phase-shifting transformer based dc power supply system according to an exemplary embodiment of the disclosure;
FIG. 3 schematically illustrates a schematic diagram of another phase shifting transformer based DC power supply system in an exemplary embodiment of the disclosure;
FIG. 4 schematically illustrates a schematic diagram of another phase shifting transformer based DC power supply system in an exemplary embodiment of the disclosure;
fig. 5 schematically illustrates a power supply control method in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
In view of the shortcomings and drawbacks of the prior art, the exemplary embodiment provides a phase-shifting transformer based dc power supply system, including: a phase-shifting transformer comprising n secondary windings; n alternating current-direct current conversion modules; the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the alternating current and direct current conversion module comprises a plurality of rectification modules; the rectification modules of the alternating current-direct current conversion modules are connected in parallel to form m direct current buses; the m direct current buses are respectively connected with the m loads; wherein n and m are positive integers; m is less than or equal to n.
In this exemplary embodiment, the rectification modules of each ac-dc conversion module are connected in parallel to form m dc buses; the m direct current buses are respectively connected with m loads, and the method comprises the following steps:
configuring one rectifying module in each alternating current-direct current conversion module to be connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M
In this exemplary embodiment, configuring one of the rectifier modules in each of the ac-dc conversion modules to be connected in parallel to form an mth dc bus includes:
and the M-th rectifying module in each alternating current-direct current conversion module is connected in parallel to form an M-th direct current bus.
Specifically, referring to fig. 2, the system may include: the system comprises a phase-shifting transformer 201, a phase-shifting winding 2011, an alternating current-direct current conversion module 202, a rectification module 2022 and a load 203. The phase shift winding 2011 is the secondary winding (secondary winding) described above. The primary side of the phase-shifting transformer is connected to the grid, for example, to a 10kV input. The phase-shifting transformer comprises at least 2 secondary windings.
Referring to fig. 2, the phase-shifting transformer includes 4 secondary side phase-shifting windings (1, 2, 3, 4). Correspondingly, 4 alternating current-direct current conversion modules (1, 2, 3 and 4) are configured in the system; and each secondary side winding is respectively connected with an alternating current-direct current conversion module. Each alternating current-direct current conversion module comprises 2 rectifier modules; connecting the first rectifier modules (11, 21, 31 and 41) in each AC-DC conversion module in parallel to form a section of bus to supply power to the load 1; meanwhile, the second rectifying modules (12, 22, 32, 42) in each AC/DC conversion module are connected in parallel to form a second section of bus for supplying power to the load 2.
For example, the number of the rectifier modules in each ac/dc conversion module is the same as the number of the loads. Specifically, referring to fig. 3, the phase-shifting transformer includes N secondary windings, and N ac/dc conversion modules are correspondingly configured, where each ac/dc conversion module includes N rectifier modules, and the number of loads is N. Connecting the first rectifying modules (11, 21, 31, … … N1) in each AC/DC conversion module in parallel to form a section of bus for supplying power to the load 1; meanwhile, second rectifying modules (12, 22, 32, … … N2) in each alternating current-direct current conversion module are connected in parallel to form a second section of bus for supplying power to the load 2; and by analogy, the nth rectifying module (1 n, 2n, 3n, … … Nn) in each AC-DC conversion module is used.
In this exemplary embodiment, the rectification modules of each ac-dc conversion module are connected in parallel to form m dc buses; the m direct current buses are respectively connected with m loads, and the method comprises the following steps:
two or more than two rectifier modules in each alternating current-direct current conversion module are configured and connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M.
In this exemplary embodiment, configuring two or more rectifier modules in each ac/dc conversion module, and connecting them in parallel to form an mth dc bus includes:
utilizing the first to the Nth rectifier modules in each alternating current-direct current conversion module to form a first direct current bus in parallel; the first direct current bus is connected with a first load; wherein N is a positive integer.
Specifically, one or more rectifier modules can be selected from each ac/dc conversion module according to the size of the load carried by the dc rear end, and the rectifier modules are combined and connected in parallel to form one or more sections of dc buses to supply power to the load.
For example, referring to fig. 4, if the load 1 is large, in order to meet the requirement of the load 1, a plurality of rectifier modules may be selected to be connected in parallel in each ac-dc conversion module to form a first dc bus for supplying power to the load 1. For example, the ac-dc conversion module includes 3 rectifier modules, and two rectifier modules (11, 12, 21, 22, 31, 32, 41, and 42) are disposed in each ac-dc conversion module and connected in parallel to form a section of bus for supplying power to the load 1. The load 2 is small, and a rectifying module (13, 23, 3, 43) can be configured in each AC/DC conversion module to form a section of bus to supply power to the load 2.
Of course, in other exemplary embodiments, other numbers of rectifier modules may be arranged in each ac-dc conversion module for the load. The allocation may specifically be based on the actual size of the load.
In this exemplary embodiment, a power supply control method is further provided, which can be applied to the above-mentioned dc power supply system based on the phase-shifting transformer.
Specifically, referring to fig. 5, the method may include:
s51, configuring the number of the alternating current-direct current conversion modules according to the number of the secondary windings in the phase-shifting transformer; the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the number of the rectifier modules contained in each alternating current-direct current conversion module is n; and
step S52, matching rectification modules in each alternating current-direct current conversion module according to the size of the load, and connecting the rectification modules matched in each alternating current-direct current conversion module in parallel to form m direct current buses, wherein the m direct current buses are respectively connected with the m loads; wherein n and m are positive integers.
In this exemplary embodiment, the m dc buses are formed by connecting the matched rectifier modules in each ac/dc conversion module in parallel, and the m dc buses are respectively connected to m loads, including:
configuring one rectifying module in each alternating current-direct current conversion module to be connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M.
In this exemplary embodiment, the m dc buses are formed by connecting the matched rectifier modules in each ac/dc conversion module in parallel, and the m dc buses are respectively connected to m loads, including:
configuring one rectifying module in each alternating current-direct current conversion module to be connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M.
Specifically, the method realizes a module combination mode in each alternating current rectification conversion module at the direct current output side by configuring a plurality of rectification modules in the alternating current direct current conversion module. The output ends of the alternating current and direct current transformer modules at the rear end of the secondary side winding are recombined to form one or more sections of buses for supplying power to different loads, so that the output parallel scheme among the alternating current rectification conversion modules at the direct current output side is realized. In addition, the loading of each winding can be made identical by adjustment of the system monitor. Also, the different loads may be arbitrarily configured. Specifically, according to the size of the load carried by the dc rear end, one rectifier module in the ac-dc conversion module may be selected, or a plurality of rectifier modules may be selected and combined in parallel to form one or more segments of dc buses, so as to supply power to the load without affecting the transformer; such as the examples shown in fig. 3, 4. The result of doing so can effectually avoid phase-shifting transformer to lead to local heating because of the secondary side uneven load, better protection transformer and increase of service life.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (10)
1. A direct current power supply system based on a phase-shifting transformer is characterized by comprising:
a phase-shifting transformer comprising n secondary windings; and the number of the first and second groups,
n alternating current-direct current conversion modules;
the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the alternating current and direct current conversion module comprises n rectification modules;
the rectification modules in the alternating current-direct current conversion modules are connected in parallel to form m direct current buses; the m direct current buses are respectively connected with m loads; wherein n and m are positive integers.
2. The phase-shifting transformer-based DC power supply system according to claim 1, wherein m ≦ n.
3. The phase-shifting transformer based direct current power supply system according to claim 1 or 2, wherein the rectifier modules of each of the alternating current-direct current conversion modules are connected in parallel to form m direct current buses; the m direct current buses are respectively connected with m loads, and the method comprises the following steps:
configuring one rectifying module in each alternating current-direct current conversion module to be connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with an Mth load; wherein M is a positive integer, and M is less than or equal to M.
4. The phase-shifting transformer based dc power supply system according to claim 3, wherein configuring one of said rectifying modules in each of said ac-dc conversion modules to be connected in parallel to form an mth dc bus comprises:
and the M-th rectifying module in each alternating current-direct current conversion module is connected in parallel to form an M-th direct current bus.
5. The phase-shifting transformer-based direct-current power supply system according to claim 1 or 2, wherein the rectification modules of the alternating-current and direct-current conversion modules are connected in parallel to form m direct-current buses; the m direct current buses are respectively connected with m loads, and the method comprises the following steps:
two or more than two rectifier modules in each alternating current-direct current conversion module are configured and connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M.
6. The phase-shifting transformer-based DC power supply system according to claim 5, wherein two or more of the rectifier modules in each AC/DC conversion module are configured to be connected in parallel to form an Mth DC bus, comprising:
utilizing the first to the Nth rectifier modules in each alternating current-direct current conversion module to form a first direct current bus in parallel; the first direct current bus is connected with a first load; wherein N is a positive integer.
7. The phase-shifting transformer-based dc power supply system according to claim 1, wherein the phase-shifting transformer comprises at least 2 secondary windings.
8. A power supply control method applied to the phase-shifting transformer-based direct current power supply system according to any one of claims 1 to 7, wherein the method comprises:
configuring the number of the alternating current-direct current conversion modules according to the number of the secondary windings in the phase-shifting transformer; the input end of each alternating current-direct current conversion module is respectively connected with the output end of one secondary winding of the phase-shifting transformer; the number of the rectifier modules contained in each alternating current-direct current conversion module is n; and
matching rectification modules in the alternating current-direct current conversion modules according to the size of the load, and connecting the rectification modules matched in the alternating current-direct current conversion modules in parallel to form m direct current buses, wherein the m direct current buses are respectively connected with the m loads; wherein n and m are positive integers.
9. The power supply control method according to claim 8, wherein the matched rectifier modules in each ac-dc conversion module are connected in parallel to form m dc buses, and the m dc buses are respectively connected to m loads, and the method includes:
configuring one rectifying module in each alternating current-direct current conversion module to be connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M.
10. The power supply control method according to claim 8, wherein the matched rectifier modules in each ac-dc conversion module are connected in parallel to form m dc buses, and the m dc buses are respectively connected to m loads, and the method includes:
two or more than two rectifier modules in each alternating current-direct current conversion module are configured and connected in parallel to form an Mth direct current bus; the Mth direct current bus is connected with the Mth load; wherein M is a positive integer, and M is less than or equal to M.
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| CN202210995901.3A CN115395805A (en) | 2022-08-18 | 2022-08-18 | Direct-current power supply system based on phase-shifting transformer and control method |
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| CN202210995901.3A CN115395805A (en) | 2022-08-18 | 2022-08-18 | Direct-current power supply system based on phase-shifting transformer and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116316525A (en) * | 2023-05-17 | 2023-06-23 | 上海百竹成航新能源有限责任公司 | DC power supply system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116316525A (en) * | 2023-05-17 | 2023-06-23 | 上海百竹成航新能源有限责任公司 | DC power supply system |
| CN116316525B (en) * | 2023-05-17 | 2023-09-01 | 上海百竹成航新能源有限责任公司 | DC power supply system |
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