CN117200415A - Power supply system - Google Patents
Power supply system Download PDFInfo
- Publication number
- CN117200415A CN117200415A CN202310681094.2A CN202310681094A CN117200415A CN 117200415 A CN117200415 A CN 117200415A CN 202310681094 A CN202310681094 A CN 202310681094A CN 117200415 A CN117200415 A CN 117200415A
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- supply line
- voltage
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005856 abnormality Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
-
- 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
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02M1/007—Plural converter units in cascade
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
A power supply system, comprising: a power converter configured to convert the received power into direct-current power of a first voltage and output the direct-current power of the first voltage; a first power supply line connected between the power converter and the first load; a second power supply line connected to a second load; a transformer connected between the first power supply line and the second power supply line and configured to maintain a ratio of a voltage of the first power supply line to a voltage of the second power supply line constant; and a battery connected to the second power supply line.
Description
Technical Field
The present invention relates to a power supply system.
Background
Patent document 1 discloses a power supply apparatus that uses a first converter connected between a high-voltage battery and a 42-volt power supply line and a second converter connected between the 42-volt power supply line and a 14-volt power supply line to supply electric power from the high-voltage battery to a large electric power load 23 connected to the 42-volt power supply line and a 14-volt load connected to the 14-volt power supply line.
For occurrence of an abnormality in the high-voltage battery, the power supply device disclosed in patent document 1 includes a first power storage device connected to a 42-volt power supply line and a second power storage device connected to a 14-volt power supply line.
Further, the second converter of the power supply device disclosed in patent document 1 is a bidirectional converter, so when an abnormality occurs in the high-voltage battery, the second converter is controlled to convert from 14 volts to 48 volts if the voltage between terminals in the first power storage device is below a specified value, and the second converter is controlled to convert from 48 volts to 14 volts if the voltage between terminals of the second power storage device 22 is below a specified value. Therefore, in the power supply device disclosed in patent document 1, when the state of charge of either the first power storage device or the second power storage device is reduced, the power storage device whose state of charge has been reduced can be supported by the power storage device whose state of charge has not been reduced.
Prior Art
Patent literature
Patent document 1: japanese patent application publication JP2011-30362
Disclosure of Invention
Problems to be solved by the invention
In order to obtain redundancy as described above, the power supply device disclosed in patent document 1 has a complex system configuration having a controller that monitors the voltage between the terminals of the high-voltage battery 20, the voltage between the terminals of the first power storage device, and the voltage between the terminals of the second power storage device, and controls the second converter based on the voltages between these terminals. Further, in the power supply device disclosed in patent document 1, the controller controls switching of the switching direction of the second converter. Therefore, when the switching direction of the second converter is switched, a delay occurs due to the switching control.
It is therefore an object of the present invention to provide a power supply system that makes power supply redundant by a simple system configuration.
Solution to the problem
In order to solve the above-described problems, a power supply system according to an embodiment of the present invention includes: a power converter configured to convert the received power into direct-current power of a first voltage and output the direct-current power of the first voltage; a first power supply line connected between the power converter and the first load; a second power supply line connected to a second load; a transformer connected between the first power supply line and the second power supply line and configured to maintain a ratio of a voltage of the first power supply line to a voltage of the second power supply line constant; and a battery connected to the second power supply line.
Advantageous effects of the invention
According to the present invention, a power supply system that realizes redundancy of power supply by a simple system configuration can be provided.
Drawings
Fig. 1 is a schematic diagram illustrating a power supply system 100 according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a power supply system 100 according to another embodiment of the present invention.
List of reference marks
100 power supply system
110 power converter
120 first power supply line
130 second power supply line
140 transformer
150 battery
160 capacitor
200 power supply
300 first load
400 second load
Detailed Description
< Power supply System 100 >)
Fig. 1 is a schematic diagram illustrating a power supply system 100 according to an embodiment of the present invention. The power supply system 100 includes a power converter 110, a first power supply line 120, a second power supply line 130, a transformer 140, and a battery 150.
The power supply system 100 supplies power supplied from the power supply source 200 to a first load 300 connected to the first power supply line 120 and a second load 400 connected to the second power supply line 130. The power supply 200 includes, for example, a battery that stores electric power and a generator that generates electric power.
In the example shown in fig. 1, one first load 300 is connected to the first power supply line 120, but a plurality of first loads 300 may be connected to the first power supply line 120. In the example shown in fig. 1, one second load 400 is connected to the second power supply line 130, but a plurality of second loads 400 may be connected to the second power supply line 130.
The power converter 110 is connected between the power supply source 200 and the first power supply line 120, receives an input of power supplied from the power supply source 200, converts the input power into direct-current power of a first voltage, and outputs the direct-current power of the first voltage to the first power supply line 120.
The first power supply line 120 is connected between the power converter 110 and the first load 300, and supplies direct-current power output from the power converter 110 to the first load 300.
Therefore, in the present embodiment, when the power supply source 200 and the power converter 110 are operating normally, that is, when the power converter 110 outputs the direct-current power of the first voltage, the voltage of the first power supply line 120 is maintained at the first voltage, and the direct-current power of the first voltage is supplied to the first load 300.
The power converter 110 stops its operation when an abnormality occurs in the power supply 200 (for example, when the output voltage of the power supply 200 drops below a predetermined value) and when an abnormality occurs in the power converter 110 (for example, when the output voltage of the power converter 110 becomes equal to or smaller than a predetermined value). In other words, in the present embodiment, when an abnormality occurs in the power supply source 200 or the power converter 110, no direct-current power is output from the power converter 110 to the first power supply line 120.
When the electric power supplied from the power supply 200 is direct-current electric power, the electric power converter 110 is a DC-DC converter that converts direct-current electric power into direct-current electric power. When the power supplied from the power supply 200 is AC power, the power converter 110 is an AC-DC converter that converts AC power into DC power. In the example shown in fig. 1, the power supply 200 is a power supply that supplies direct-current power, and the power converter 110 is a DC-DC converter.
The second power supply line 130 is connected to the second load 400 and supplies power to the second load 400.
The transformer 140 is connected between the first power supply line 120 and the second power supply line 130, transmits direct current power between the first power supply line 120 and the second power supply line 130, and maintains a ratio of a voltage of the first power supply line 120 to a voltage of the second power supply line 130 at a constant ratio of a to b. The transformer 140 is a so-called DC-DC transformer, such as a solid state transformer.
Therefore, in the present embodiment, if the transformer 140 is operating normally while the power converter 110 outputs the direct-current power of the first voltage, direct-current power transmission is generated between the first power supply line 120 and the second power supply line 130 via the transformer 140, and the voltage of the second power supply line 130 is maintained at the second voltage ((second voltage) = (b/a) · (first voltage)) that is (b/a) times the first voltage, so that the direct-current power of the second voltage is supplied to the second load 400.
In other words, when the power converter 110 outputs the dc power of the first voltage and the transformer 140 operates normally, in the present embodiment, the dc power of the first voltage is supplied to the first load 300, and the dc power of the second voltage is supplied to the second load 400.
In contrast, when an abnormality occurs in the transformer 140 and the transformer 140 does not operate, there is no direct current power transmission via the transformer 140. Thus, in the present embodiment, the battery 150 is connected to the second power supply line 130. When the dc power of the first voltage is output from the power converter 110, but the transformer 140 is not operated, in the present embodiment, power is supplied from the power converter 110 to the first load 300, and the battery 150 supplies power to the second load 400.
Further, in the present embodiment, when the power converter 110 is not operated due to such reasons as occurrence of an abnormality in the power supply source 200 or the power converter 110, that is, when the power converter 110 does not output the direct-current power of the first voltage, transmission of the direct-current power from the second power supply line 130 to the first power supply line 120 is performed in the transformer 140 such that the ratio of the voltage of the first power supply line 130 to the voltage of the second power supply line 130 is maintained at a constant ratio of a: b. Accordingly, when the power converter 110 no longer outputs the direct-current power of the first voltage, the battery 150 supplies power to the first load 300 and the second load 400 in the present embodiment.
As described above, in the present embodiment, without performing control of the transformer 140 according to the states of the power supply 200 and the power converter 110, electric power can be supplied to the first load 300 and the second load 400 regardless of the states of the power supply 200 and the power converter 110. Therefore, in the present embodiment, it is not necessary to provide a controller that monitors the states of the power supply 200 and the power converter 110 and controls the transformer 140 according to the states of the power supply 200 and the power converter 100, and redundancy of power supply can be achieved with a simple system configuration. Therefore, in the present embodiment, a power supply system in which power supply is redundant can be provided by a simple configuration.
Further, in the present embodiment, as described above, the transformer 140 switches the transmission direction of the direct current power between the first power supply line 120 and the second power supply line 130 such that the ratio of the voltage of the first power supply line 120 to the voltage of the second power supply line 130 is maintained at a constant ratio of a to b. Therefore, in the present embodiment, delay due to the switching control is not generated.
Further, in the present embodiment, if an abnormality occurs in the battery 150 and the battery 150 no longer supplies power while the power converter 110 outputs the direct-current power of the first voltage and the transformer 140 is operating normally, transmission of the direct-current power from the first power supply line 120 to the second power supply line 130 is performed in the transformer 140 such that the ratio of the voltage of the first power supply line 120 to the voltage of the second power supply line 130 is maintained at a constant ratio of a to b.
< Power from first load 300 >
The first load 300 may be a load that provides power in addition to consuming power. The first load 300 may be, for example, a motor that generates regenerative power. In this case, the first load 300 outputs the generated regenerative electric power to the first power supply line 120.
When the first load 300 generates electric power, in the present embodiment, electric power transmission from the first power supply line 120 to the second power supply line 130 is performed in the transformer 140 such that the ratio of the voltage of the first power supply line 120 to the voltage of the second power supply line 130 is maintained at a constant ratio of a to b.
In this case, as shown in fig. 2, the power supply system 100 may further have a capacitor 160 connected to the first power supply line 120. In this case, an increase in the amount of power transmission from the first power supply line 120 to the second power supply line 130 due to the power output from the first load 300 can be alleviated, and voltage fluctuations in the second power supply line 130 can be reduced.
The invention has been described above with reference to the preferred embodiments thereof. Although the present invention has been described by referring to specific embodiments, various modifications and changes can be made to the embodiments without departing from the spirit and scope of the invention as set forth in the claims.
Claims (5)
1. A power supply system, comprising:
a power converter configured to convert the received power into direct-current power of a first voltage and output the direct-current power of the first voltage;
a first power supply line connected between the power converter and a first load;
a second power supply line connected to a second load;
a transformer connected between the first power supply line and the second power supply line and configured to maintain a ratio of a voltage of the first power supply line to a voltage of the second power supply line constant; and
and a battery connected to the second power supply line.
2. The power supply system according to claim 1, wherein the power converter stops operating when an abnormality occurs in the power supply source.
3. The power supply system according to claim 2, wherein the power converter stops operating when an abnormality occurs in the power converter.
4. The power supply system of claim 1, wherein the first load is a load that consumes power and provides power.
5. The power supply system of claim 4, further comprising a capacitor connected to the first power supply line.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022092836A JP2023179911A (en) | 2022-06-08 | 2022-06-08 | power supply system |
| JP2022-092836 | 2022-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117200415A true CN117200415A (en) | 2023-12-08 |
Family
ID=87889225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310681094.2A Pending CN117200415A (en) | 2022-06-08 | 2023-06-08 | Power supply system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2023179911A (en) |
| CN (1) | CN117200415A (en) |
| DE (1) | DE102023113053A1 (en) |
| FR (1) | FR3136614A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5413017B2 (en) | 2009-07-24 | 2014-02-12 | 株式会社豊田自動織機 | Vehicle power supply |
| CN114421587A (en) * | 2021-12-31 | 2022-04-29 | 珠海广通汽车有限公司 | Standby power supply, vehicle and control method of vehicle |
-
2022
- 2022-06-08 JP JP2022092836A patent/JP2023179911A/en active Pending
-
2023
- 2023-05-12 FR FR2304765A patent/FR3136614A1/en active Pending
- 2023-05-17 DE DE102023113053.6A patent/DE102023113053A1/en active Pending
- 2023-06-08 CN CN202310681094.2A patent/CN117200415A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3136614A1 (en) | 2023-12-15 |
| DE102023113053A1 (en) | 2023-12-14 |
| JP2023179911A (en) | 2023-12-20 |
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