CN112994007A - Remote power distribution unit architecture based on PWM rectification - Google Patents
Remote power distribution unit architecture based on PWM rectification Download PDFInfo
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- CN112994007A CN112994007A CN201911296582.1A CN201911296582A CN112994007A CN 112994007 A CN112994007 A CN 112994007A CN 201911296582 A CN201911296582 A CN 201911296582A CN 112994007 A CN112994007 A CN 112994007A
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- Prior art keywords
- distribution unit
- power distribution
- bus bar
- pwm
- power
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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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
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
Abstract
The invention discloses a remote power distribution unit architecture based on PWM rectification, which comprises a primary bus bar; and a remote power distribution unit having a PWM rectifier, an autotransformer, a dc solid state power controller, and an ac solid state power controller; wherein the PWM rectifier converts a first AC voltage from the primary bus bar to a first DC voltage and outputs to the DC solid state power controller, a power output of the DC solid state power controller for a DC electrical load; wherein the autotransformer converts the first alternating voltage from the primary bus bar into a second alternating voltage and outputs the second alternating voltage to the alternating current solid state power controller, and a power output end of the alternating current solid state power controller is used for connecting with an alternating current electrical load. The invention has the beneficial effects that: and a centralized secondary power supply is omitted, and an airplane avionics power distribution system is further optimized.
Description
Technical Field
The invention relates to the field of aircraft power distribution, in particular to a remote power distribution unit architecture based on PWM rectification.
Background
With the increase and diversification of electrical loads, aviation power supply systems have evolved from early 28V low voltage dc power supply systems to hybrid power supplies, i.e., remote power distribution units are required to meet the requirements of electrical loads to output both dc and ac power. The conventional airplane power distribution system is provided with a primary bus bar, wherein 235V three-phase alternating current is directly output by an aero-generator, and a remote power distribution unit cannot directly obtain power from the primary bus bar and only can adopt 28V (or 270V) direct current and 115V variable frequency alternating current after secondary power supply conversion.
It can be seen that the existing remote power distribution unit architecture has at least the following drawbacks: 1. the 28V direct current loads of the large-scale airplane are more and all come from a TRU (transformation rectifier unit), so that the capacity of the large-scale airplane is very large, the rectification efficiency of the traditional transformer is not high, and the large loss and the difficult heat dissipation are caused; 2. the secondary electric energy adopts the bus bar to supply power for remote distribution in a centralized manner, so that a large amount of bus bar resources are consumed; 3. in the remote power distribution unit for secondary power distribution, each power distribution channel has a power output line. As the number of loads on board an aircraft increases, the number of electrical distribution channel output lines required increases. Moreover, the part of the cable is usually laid in the airplane for a long distance, which greatly increases the weight of the airplane; 4. the incoming line voltage level of the remote power distribution unit of secondary power distribution is lower, generally 28V direct current or 115V alternating current, and the capacity of a secondary power distribution power grid is limited to be further improved.
Disclosure of Invention
The technical problem solved by the invention is that the existing remote power distribution unit can not directly get power from a primary bus bar, and a novel remote power distribution unit framework based on PWM rectification is provided.
In order to achieve the purpose, the technical scheme of the invention is as follows: a remote power distribution unit architecture based on PWM rectification comprises,
a primary bus bar; and the number of the first and second groups,
a remote power distribution unit having a PWM rectifier, an autotransformer, a DC solid state power controller, and an AC solid state power controller;
the primary bus bar is connected with the input end of the PWM rectifier, the output end of the PWM rectifier is connected with the power input end of the DC solid-state power controller, the PWM rectifier converts the first alternating-current voltage from the primary bus bar into a first direct-current voltage and outputs the first direct-current voltage to the DC solid-state power controller, and the power output end of the DC solid-state power controller is used for being connected with a DC electrical load;
the primary bus bar is connected with the input end of the autotransformer, the output end of the autotransformer is connected with the power input end of the alternating current solid-state power controller, the autotransformer converts the first alternating current voltage from the primary bus bar into a second alternating current voltage and outputs the second alternating current voltage to the alternating current solid-state power controller, and the power output end of the alternating current solid-state power controller is used for being connected with an alternating current electrical load.
As a preferable scheme of the PWM rectification-based remote power distribution unit architecture, the first ac voltage is 235 vac, the first dc voltage is 28V or 270V dc, and the second ac voltage is 115 vac.
As a preferred solution for the remote power distribution unit architecture based on PWM rectification, the PWM rectifier is a diode-clamped three-level rectifier or a three-level rectifier of other topologies.
As a preferred solution for the remote power distribution unit architecture based on PWM rectification, the PWM rectifier is a two-level rectifier of different topologies.
As a preferred scheme of the remote power distribution unit architecture based on PWM rectification, the connection of the PWM rectifier topology may be a three-phase three-leg connection or a three-phase four-leg connection.
The preferred scheme of the remote power distribution unit architecture based on the PWM rectification further includes a first generator, a second generator and an auxiliary power supply, and the primary bus bar is connected to the first generator, the second generator and the auxiliary power supply respectively.
Compared with the prior art, the invention has the beneficial effects that: 1. the remote power distribution unit directly gets power from the primary bus bar, so that a secondary power supply bus bar is omitted, circuit resources are saved, and the volume and the weight of a power distribution system are reduced; 2, the PWM transformer rectifier adopts a novel semiconductor device, and compared with a winding and a magnetic core of a traditional multi-pulse rectifier, the weight of secondary power supply conversion equipment can be further reduced; 3. the remote power distribution unit can be distributed near the electrical load, the power output line is greatly shortened, the cost for laying a large number of long cables is saved, and the weight of the airplane is also reduced; 4. the voltage level of the power inlet wire is high, and the capacity of the remote power distribution unit can be further expanded.
Drawings
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a remote power distribution unit according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a diode clamp type three-level rectifier according to an embodiment of the invention.
Detailed Description
The invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a PWM rectification based remote power distribution unit architecture is shown.
The remote power distribution unit architecture is mainly composed of a primary bus bar 1 and a remote power distribution unit 2 (RPDU).
The primary bus bar 1 is connected with a first generator 3, an auxiliary power supply 4 and a second generator 5 respectively. In this embodiment, the primary bus bar 1 is a 235V ac power.
Referring to fig. 2, the remote power distribution unit 2 is shown. The remote power distribution unit 2 has a PWM rectifier 21, an autotransformer 22, an internal power supply module 23, a dc solid state power controller 24 and an ac solid state power controller 25.
The PWM rectifier 21 may be a diode-clamped three-level rectifier, or a three-level rectifier with other connection methods, such as a flying capacitor three-level rectifier, a Vienna rectifier, etc. The PWM rectifier 21 may also be further extended to a two-level rectifier. The topology can adopt three-phase three-bridge arm connection and can also extend to three-phase four-bridge arm connection. In this embodiment, 235V frequency-variable ac is input to the circuit, and 28V dc is output. Note that the output dc power is not limited to 28V. In other embodiments, 270 vdc or otherwise may be output. Note that the input ac power is not limited to 235V. In other embodiments, 115V ac or otherwise may be input.
Referring to fig. 3, a diode clamp three level rectifier is shown. L1, L2 and L3 are input side filter inductors, which filter current ripple and transfer energy to the three-phase input ac power. The three levels are referenced to the output status in different switch states for the rear end potentials of L1, L2 and L3, i.e. the input end potential of the rectifier bridge, when the output voltage is uoThere are three possibilities for this point potential: u. ofo、uoAnd/2 and 0. The topology adopts two switching tubes connected in series to form a bridge arm, and the midpoint of the bridge arm is clamped through a diode, so that a middle level is generated.
The autotransformer 22 taps a path of output variable frequency alternating current from the primary winding. In this embodiment, 235V frequency-variable ac power is input to the circuit and 115V frequency-variable ac power is output.
The primary bus bar 1 is connected to an input terminal of the PWM rectifier 21. The output end of the PWM rectifier 21 is connected to the power input end of the dc solid-state power controller 24 and the internal power supply module 23, respectively. The PWM rectifier 21 converts the 235V ac power from the primary bus bar 1 into 28V dc power and outputs to the dc solid state power controller 24 and the internal power supply module 23. The power output terminal of the dc solid-state power controller 24 is used for connecting a dc electrical load to supply power to the dc electrical load.
Wherein, the primary bus bar 1 is connected with the input end of the autotransformer 22. The output end of the autotransformer 22 is connected with the power input end of the alternating current solid-state power controller 25. The autotransformer 22 converts the 235V ac power from the primary bus bar 1 to 115V ac power and outputs to the ac solid state power controller 25. The power output terminal of the ac solid-state power controller 25 is used for connecting an ac electrical load to supply power to the ac electrical load.
Wherein the internal power module 23 converts the 28V dc power from the PWM rectifier 21 into a lower dc voltage (e.g., 12VDC, 5 VDC), which further powers the dc solid state power controller 24 and the ac solid state power controller 25 to ensure normal operation.
By adopting the remote power distribution unit architecture, a centralized secondary power supply is omitted, and an aircraft avionics power distribution system is further optimized. Has the following advantages: 1. the remote power distribution unit 2 directly gets power from the primary bus bar 1, so that a secondary power supply bus bar is omitted, circuit resources are saved, and the volume and the weight of a power distribution system are reduced; 2, the PWM transformer rectifier adopts a novel semiconductor device, and compared with a winding and a magnetic core of a traditional multi-pulse rectifier, the PWM transformer rectifier can further reduce the weight of equipment for secondary power supply conversion; 3. the remote power distribution unit 2 is installed close to the electrical load, the power output line is greatly shortened, the cost for laying a large number of cables is saved, and the weight of the airplane is also reduced; 4. the voltage level of the power inlet line is high, which is beneficial to further expanding the capacity of the remote power distribution unit 2.
The foregoing merely represents embodiments of the invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The remote power distribution unit architecture based on PWM rectification is characterized by comprising,
a primary bus bar; and the number of the first and second groups,
a remote power distribution unit having a PWM rectifier, an autotransformer, a DC solid state power controller, and an AC solid state power controller;
the primary bus bar is connected with the input end of the PWM rectifier, the output end of the PWM rectifier is connected with the power input end of the DC solid-state power controller, the PWM rectifier converts the first alternating-current voltage from the primary bus bar into a first direct-current voltage and outputs the first direct-current voltage to the DC solid-state power controller, and the power output end of the DC solid-state power controller is used for being connected with a DC electrical load;
the primary bus bar is connected with the input end of the autotransformer, the output end of the autotransformer is connected with the power input end of the alternating current solid-state power controller, the autotransformer converts the first alternating current voltage from the primary bus bar into a second alternating current voltage and outputs the second alternating current voltage to the alternating current solid-state power controller, and the power output end of the alternating current solid-state power controller is used for being connected with an alternating current electrical load.
2. The PWM rectification based remote power distribution unit architecture of claim 1, wherein the first AC voltage is 235 VAC, the first DC voltage is 28V or 270 VDC, and the second AC voltage is 115 VAC.
3. The PWM rectification based remote power distribution unit architecture of claim 1, wherein the PWM rectifier is a diode clamped three-level rectifier or a three-level rectifier of other topology.
4. The PWM rectification-based remote power distribution unit architecture of claim 1, wherein the PWM rectifier is a two-level rectifier of different topologies.
5. Three-level and two-level rectifiers as claimed in claim 3 or 4, characterized in that the connections of the topology are three-phase three-leg connections or three-phase four-leg connections.
6. The PWM rectification based remote power distribution unit architecture according to any one of claims 1-5, further comprising a first generator, a second generator and an auxiliary power source, wherein the primary bus bar is connected to the first generator, the second generator and the auxiliary power source respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296582.1A CN112994007A (en) | 2019-12-16 | 2019-12-16 | Remote power distribution unit architecture based on PWM rectification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911296582.1A CN112994007A (en) | 2019-12-16 | 2019-12-16 | Remote power distribution unit architecture based on PWM rectification |
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| CN112994007A true CN112994007A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911296582.1A Withdrawn CN112994007A (en) | 2019-12-16 | 2019-12-16 | Remote power distribution unit architecture based on PWM rectification |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115549195A (en) * | 2022-10-14 | 2022-12-30 | 哈尔滨工业大学 | Airplane distributed remote power distribution system and working method thereof |
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2019
- 2019-12-16 CN CN201911296582.1A patent/CN112994007A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115549195A (en) * | 2022-10-14 | 2022-12-30 | 哈尔滨工业大学 | Airplane distributed remote power distribution system and working method thereof |
| CN115549195B (en) * | 2022-10-14 | 2023-04-07 | 哈尔滨工业大学 | Airplane distributed remote power distribution system and working method thereof |
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Application publication date: 20210618 |
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