CN110556814B - Power input priority structure of right and left normal direct-current distribution bus bars of airplane power supply - Google Patents
Power input priority structure of right and left normal direct-current distribution bus bars of airplane power supply Download PDFInfo
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- CN110556814B CN110556814B CN201810551410.3A CN201810551410A CN110556814B CN 110556814 B CN110556814 B CN 110556814B CN 201810551410 A CN201810551410 A CN 201810551410A CN 110556814 B CN110556814 B CN 110556814B
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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
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- H02J1/10—Parallel operation of dc sources
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Abstract
The invention discloses a power input priority structure of a right and left normal direct-current distribution Bus bar of an airplane power supply, which comprises a Bus bar R28 VDC Bus, wherein the Bus bar R28 VDC Bus is selectively powered by one of a power conversion device TRU R, a Bus bar L28 VDC Bus, a ground power supply R FWD EP, a ground power supply L FWD EP and a Bus bar R235 VAC Bus; and a Bus bar L28 VDC Bus selectively supplied by one of the power conversion device TRU L, the Bus bar R28 VDC Bus, the ground power supply R FWD EP, the ground power supply L FWD EP, and the Bus bar L235 VAC Bus. The invention has the beneficial effects that the priority is set, so that the power input of the Bus bar R28 VDC Bus and the Bus bar L28 VDC Bus is better managed.
Description
Technical Field
The invention relates to a power input priority structure of a right and left normal direct-current distribution bus bar of an aircraft power supply.
Background
The power supply system of the single-channel multi-motor aircraft comprises left and right 2 variable-frequency main starting generators GEN L and GEN R with rated power of 225kVA, an APU starting generator with rated power of 200kVA and a RAT generator with rated power of 50 kVA. There are also three external power sources, L FWD EP, R FWD EP and L AFT EP, respectively, each of which sockets can support a maximum of 90kVA of power. The main starter generator, the APU starter generator and the RAT generator are all rated at 235VAC, and the three external sources are rated at 115VAC.
The power system has left and right normal dc distribution buss bars L28 VDC Bus and R28 VDC Bus, which have multiple possible power input sources and therefore need to be prioritized because only one power source can be accepted at a time. When a plurality of power sources exist at the same time, a power source with a high access priority is selected.
Disclosure of Invention
The invention aims to solve the technical problem of priority setting of normal direct current distribution bus bars and provides a novel structure for power input priority of the right and left normal direct current distribution bus bars of a single-channel multi-electric aircraft power supply system.
In order to achieve the purpose, the technical scheme of the invention is as follows: the power input priority structure of the left and right normal direct current distribution bus bars of the single-channel multi-motor aircraft power supply system comprises,
bus bar R28 VDC Bus selectively powered by one of power conversion device TRU R, bus bar L28 VDC Bus, ground power source R FWD EP, ground power source L FWD EP, and Bus bar R235 VAC Bus; the power conversion device TRU R and the Bus bar L28 VDC Bus are direct power sources, and the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar R235 VAC Bus are indirect power sources; the power supply priority of the direct power source is higher than that of the indirect power source; in the direct power source, the power supply priority of the power conversion device TRU R is higher than that of the Bus bar L28 VDC Bus; in the indirect power source, the power supply priority of the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar R235 VAC Bus is the same; the method comprises the steps of,
a Bus bar L28 VDC Bus selectively powered by one of the power conversion device TRU L, the Bus bar R28 VDC Bus, the ground power supply R FWD EP, the ground power supply L FWD EP, and the Bus bar L235 VAC Bus; the power conversion device TRU L and the Bus bar R28 VDC Bus are direct power sources, and the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar L235 VAC Bus are indirect power sources; the power supply priority of the direct power source is higher than that of the indirect power source; in the direct power source, the power supply priority of the power conversion device TRU L is higher than that of the Bus bar R28 VDC Bus; in the indirect power source, the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar L235 VAC Bus have the same power supply priority.
As the optimal scheme of the power input priority structure of the left and right normal direct-current distribution Bus bars of the single-channel multi-motor aircraft power supply system, if three indirect power sources of the Bus bar R28 VDC Bus exist at the same time, the power source which is turned ON last time is optimal; if three indirect power sources of the Bus bar L28 VDC Bus exist at the same time, the last power source turned ON is optimal.
As a preferable scheme of the power input priority structure of the left and right normal direct current distribution Bus bars of the single-channel multi-electric aircraft power supply system, for Bus bars R28 VDC Bus, the power supply priority of a ground power supply R FWD EP middle path power supply conversion device TRU R is higher than that of a path Bus bar L28 VDC Bus, the power supply priority of the ground power supply L FWD EP middle path power supply conversion device TRU R is higher than that of the path Bus bar L28 VDC Bus, and the power supply priority of the Bus bar R235 VAC Bus middle path power supply conversion device TRU R is higher than that of the path Bus bar L28 VDC Bus; for the Bus bar L28 VDC Bus, the ground power supply L FWD EP intermediate path power supply conversion device TRU L has a higher power supply priority than the path Bus bar R28 VDC Bus, and the Bus bar L235 VAC Bus intermediate path power supply conversion device TRU L has a higher power supply priority than the path Bus bar R28 VDC Bus.
The power input priority structure of the left and right normal direct current distribution bus bars of the single-channel multi-motor aircraft power supply system is preferably provided with a contactor L GCB, a contactor R GCB, a contactor L BTB, a contactor APB and a contactor R BTB; the first end of the contactor L GCB is connected with the main generator GEN L, and the second end of the contactor L GCB is connected with the Bus bar L235 VAC Bus; the first end of the contactor R GCB is connected with the main generator GEN R, and the second end of the contactor R GCB is connected with the Bus bar R235 VAC Bus; the first end of the contactor L BTB is connected with the Bus bar L235 VAC Bus, the first end of the contactor APB is connected with the auxiliary generator APU GEN, the first end of the contactor R BTB is connected with the Bus bar R235 VAC Bus, and the second end of the contactor L BTB is connected with the second end of the contactor ATB and the second end of the contactor R BTB respectively.
The power input priority structure of the left and right normal direct current distribution bus bars of the single-channel multi-motor aircraft power supply system further comprises a contactor L ATUC, an electric energy conversion device L ATU, a contactor L BSB, a contactor R ATUC, an electric energy conversion device R ATU, a contactor R BSB, a contactor L EPC, a contactor R EPC, a contactor LacT, a contactor RacT, a contactor LdcT and a contactor RdcT; the first end of the contactor L ATUC is connected with the Bus bar L235 VAC Bus, the second end of the contactor L ATUC is connected with the electric energy conversion device L ATU, the electric energy conversion device L ATU is connected with the first end of the contactor L BSB and the first end of the contactor L EPC, the second end of the contactor L BSB is connected with the Bus bar L115 VAC Bus, and the second end of the contactor L EPC is connected with the ground power supply L FWD EP; the first end of the contactor R ATUC is connected with the Bus bar R235 VAC Bus, the second end of the contactor R ATUC is connected with the electric energy conversion device R ATU, the electric energy conversion device R ATU is connected with the first end of the contactor R BSB and the first end of the contactor R EPC, the second end of the contactor R BSB is connected with the Bus bar R115 VAC Bus, and the second end of the contactor R EPC is connected with the ground power supply R FWD EP; the first end of the contactor LacT is connected with the Bus bar L115 VAC Bus, the second end of the contactor LacT is connected with the first end of the contactor RacT, and the second end of the contactor RacT is connected with the Bus bar R115 VAC Bus; a contactor L TRU Rly, a power supply conversion device TRU L, a contactor R TRU Rly, and a power supply conversion device TRU R; the first end of the contactor L TRU Rly is connected to the second end of the contactor L ATUC, the second end of the contactor L TRU Rly is connected to the power conversion device TRU L, which in turn is connected to the Bus bar L28 VDC Bus; the first end of the contactor R TRU Rly is connected with the second end of the contactor R ATUC, the second end of the contactor R TRU Rly is connected with the power conversion device TRU R, which is in turn connected with the Bus bar R28 VDC Bus; the first end of the contactor LdcT is connected to the Bus bar L28 VDC Bus, the second end of the contactor LdcT is connected to the first end of the contactor RdcT, and the second end of the contactor RdcT is connected to the Bus bar R28 VDC Bus.
Compared with the prior art, the invention has the beneficial effects that: the priority is set to better manage the power input of the Bus R28 VDC Bus and the Bus L28 VDC Bus.
In addition to the technical problems, features constituting the technical solutions and advantageous effects caused by the technical features of the technical solutions described above, other technical problems that the present invention can solve, other technical features included in the technical solutions and advantageous effects caused by the technical features will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a power system architecture according to an embodiment of the invention.
FIG. 2 is a diagram of a direct R28 VDC Bus power source in a multi-aircraft.
Fig. 3 is an indirect power input source for TRU R28 VDC Bus in a multi-aircraft.
FIG. 4 is a power input path from an R235 VAC Bus to an R28 VDC Bus in a multi-aircraft.
Fig. 5 is a power input path from an R FWD EP input to an R28 VDC Bus in a multi-aircraft.
Fig. 6 is a power input path from the L FWD EP input to the TRU R28 VDC in the multi-aircraft.
Fig. 7 is an illustration of an L28 VDC Bus direct power source in a multi-aircraft.
Fig. 8 is an indirect power input source for TRU L28 VDC Bus in a multi-aircraft.
FIG. 9 is a power input path from an L235 VAC Bus to an L28 VDC Bus in a multi-aircraft.
Fig. 10 is a power input path from the L FWD EP input to the L28 VDC Bus in the multi-aircraft.
Fig. 11 is a power input path from the R FWD EP input to the TRU L28 VDC in the multi-aircraft.
Detailed Description
The invention will be described in further detail below with reference to the drawings by means of specific embodiments. The description of these embodiments is provided to assist understanding of the present invention, but is not to be construed as limiting the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1, a novel power input priority structure of a left and right normal dc distribution bus of a single-channel multi-electric aircraft power supply system is shown.
The generator bus voltage of the power system was 235VAC and the bus voltage of the secondary distribution was 115VAC and 28VDC, respectively. The left and right main generators are connected to the L235 VAC Bus and R235 VAC Bus bars, respectively, and are converted into 115VAC and 28VDC secondary power sources through the L ATU 115VAC,TRU L28VDC,R ATU 115VAC and TRU R28 VDC, respectively, to supply power to the L115VAC Bus,L 28VDC Bus,R 115VAC Bus and R28 VDC Bus. There are contactors L ATUC and R ATUC between the Bus bars L/R235 VAC Bus and L/R ATU 115VAC, which control the switching on and off of the two autotransformer power inputs, respectively, and provide protection in the event of overload. Similarly, there are contactors L TRU Rly and R TRU Rly at the inputs of TRU L28 VDC and TRU R28 VDC that control power input and provide protection.
And two autotransformer rectifiers of ATRU L270 VDC and ATRU R270 VDC are respectively connected to the L/R235 VAC Bus in a hanging mode to supply power for the corresponding L270 VDC Bus and R270 VDC Bus. There are corresponding contactors L ATRUC and R ATRUC between 235VAC Bus and ATRU to control the switching on and off of the ATRU power input and to provide protection in overload conditions.
The rated capacity of each ATU was 150kVA, the rated capacity of each ATU was 60kVA, and the rated output current of each TRU was 240A.
The main generator GEN L is connected with a first end of a breaker L GCB, and a second end of the breaker L GCB is connected with a Bus bar L235 VAC Bus;
the main generator GEN R is connected with a first end of a breaker R GCB, and a second end of the breaker R GCB is connected with a Bus bar R235 VAC Bus;
the auxiliary generator APU GEN is connected with the first end of the breaker APB, the Bus bar L235 VAC Bus is connected with the first end of the contactor L BTB, the Bus bar R235 VAC Bus is connected with the first end of the contactor R BTB, and the second end of the contactor APB is respectively connected with the second end of the contactor L BTB and the second end of the contactor R BTB;
the Bus bar L235 VAC Bus is connected with the first end of the contactor L ATUC, the second end of the contactor L ATUC is connected with the electric energy conversion device L ATU, the electric energy conversion device L ATU is connected with the first end of the contactor L BSB, and the second end of the contactor L BSB is connected with the Bus bar L115 VAC Bus;
the Bus bar R235 VAC Bus is connected with the first end of the contactor R ATUC, the second end of the contactor R ATUC is connected with the electric energy conversion device R ATU, the electric energy conversion device R ATU is connected with the first end of the contactor R BSB, and the second end of the contactor R BSB is connected with the Bus bar R115 VAC Bus;
the ground power supply LFWD EP is connected with a first end of the contactor L EPC, and a second end of the contactor L EPC is connected with a first end of the contactor L BSB;
the ground power supply R FWD EP is connected with a first end of the contactor R EPC, and a second end of the contactor R EPC is connected with a first end of the contactor R BSB;
the Bus bar L115 VAC Bus is connected with a first end of a contactor LacT, a second end of the contactor LacT is connected with a first end of a contactor RacT, and a second end of the contactor RacT is connected with the Bus bar R115 VAC Bus;
the second end of the contactor L ATUC is connected to the first end of the contactor L TRU Rly, the second end of the contactor L TRU Rly is connected to the power converter TRU L, which in turn is connected to the Bus bar L28 VDC Bus;
the second end of the contactor R ATUC is connected to the first end of the contactor R TRU Rly, the second end of which is connected to the power conversion means TRU R, which in turn is connected to the Bus bar R28 VDC Bus;
the Bus bar L28 VDC Bus is connected with a first end of a contactor LdcT, a second end of the contactor LdcT is connected with a first end of a contactor RdcT, and a second end of the contactor RdcT is connected with the Bus bar R28 VDC Bus;
the second end of the contactor L ATUC is connected with the first end of the contactor E1 TRU ISO Rly, the second end of the contactor E1 TRU ISO Rly is respectively connected with the power conversion device TRU E1 and the first end of the contactor E1 TRU Rly, the power conversion device TRU E1 is connected with the first end of the Bus bar ESS1 28VDC Bus, the second end of the contactor ESS ISO Rly is connected with the Bus bar ESS 235VAC Bus, the Bus bar ESS 235VAC Bus is connected with the power conversion device TRU E2, and the power conversion device TRU E2 is connected with the Bus bar ESS2 28VDC Bus;
the generator GEN RAT is connected with a first end of a contactor RCB, and a second end of the contactor RCB is connected with a Bus bar ESS 235VAC Bus;
the busbar ESS1 28VDC Bus is connected with the first end of the contactor E1T, the second end of the contactor E1T is connected with the first end of the contactor E2T, and the second end of the contactor E2T is connected with the busbar ESS2 28VDC Bus;
bus ESS1, 28VDC Bus, is connected to a first end of contactor MBR, and a second end of contactor MBR is connected to Bus Hot BB 1;
the bus bar Hot BB2 is connected with a first end of a contactor SPUC, a second end of the contactor SPUC is connected with an SPU, the SPU is connected with a first end of a contactor SPUB, and a second end of the contactor SPUB is connected with an autotransformer rectifier ATRU R;
the Bus bar L235 VAC Bus is connected with a first end of a contactor L ATRUC, a second end of the contactor L ATRUC is connected with an autotransformer rectifier ATRU L, and the autotransformer rectifier ATRU L is connected with the Bus bar L270 VDC Bus;
the Bus bar R235 VAC Bus is connected with a first end of a contactor R ATRUC, a second end of the contactor R ATRUC is connected with an autotransformer rectifier ATRU R, and the autotransformer rectifier ATRU R is connected with the Bus bar R270 VDC Bus;
the external power supply laft EP is connected to a first terminal of a contactor laxpc, and a second terminal of the contactor laxpc is connected to an autotransformer rectifier ATRU L.
Referring to fig. 2, the Bus bar R28 VDC Bus has two direct power sources, one is the Bus bar L28 VDC Bus, and the other is the power conversion unit TRU R28 VDC. The priority of the power source of the rail power converter TRU R28 VDC is higher than the power source of the rail Bus L28 VDC Bus.
The power system has left and right normal dc distribution Bus L28 VDC Bus and Bus R28 VDC Bus, which have multiple possible power input sources and therefore need to be prioritized because only one power source can be accepted at a time. When a plurality of power sources exist at the same time, a power source with a high access priority is selected.
Referring to fig. 3, three power sources of the power converting apparatus TRU R28 VDC and the Bus bar L28 VDC Bus are respectively the Bus bar R235 VAC Bus, the ground power source FWD EP and the ground power source rfwd EP. They constitute an indirect power source for the Bus bar R28 VDC Bus. In the figure, one possible power path to the R28 VDC Bus is shown for each power source.
In general, the priorities of the three power sources are equal, and if the power sources exist at the same time, the power source which is turned ON last time is optimal.
Fig. 3 shows only one possible power path for each power source, and in practice, there is more than one possible path for each power source, as will be described in detail in the following section.
1. A power input path from Bus R235 VAC Bus to Bus R28 VDC Bus.
Referring to FIG. 4, from the Bus R235 VAC Bus power source, the R28 VDC Bus may be reached via two paths, corresponding to two priorities, respectively.
The two paths are respectively:
1) Priority 1: closing the contactors R ATUC and R TRU Rly, starting from the Bus bar R235 VAC Bus, reaches the power conversion device TRU R28 VDC via the contactors R ATUC and R TRU Rly, and supplies power to the Bus bar R28 VDC Bus.
2) Priority 2: closing the contactor R BTB, the contactor L ATUC, the contactor L TRU Rly, the contactor LdcT and the contactor RdcT, starting from the Bus bar R235 VAC Bus, reaching the Bus bar L235 VAC Bus through the contactor R BTB and the contactor L BTB, reaching the power conversion device TRU L28 VDC through the contactor L ATUC and the contactor L TRU Rly, supplying power to the Bus bar L28 VDC Bus, and supplying power to the Bus bar R28 VDC Bus through the contactor LdcT and the contactor RdcT.
2. A power input path from the ground power supply LFWD EP to the Bus bar R28 VDC Bus.
Referring to fig. 5, from the ground power source lwd EP, the Bus bar R28 VDC Bus may be reached through two power paths, which respectively correspond to two power priorities:
1) Priority 1: closing the contactor L EPC, the contactor L BSB, the contactor LacT, the contactor RacT, the contactor R BSB and the contactor R TRU Rly, starting from the ground power supply L FWD EP, reaching the Bus bar L115 VAC Bus through the contactor L EPC and the contactor LBSB, reaching the Bus bar R115 VAC Bus through the contactor LacT and the contactor RacT, and reaching the electric energy conversion device R ATU 115VAC through the contactor R BSB, wherein the output power is input to the power conversion device TRU R28 VDC through the contactor R TRU Rly, and finally supplying power to the Bus bar R28 VDC Bus;
2) Priority 2: closing the contactor L EPC, the contactor L TRU Rly, the contactor LdcT, and the contactor RdcT, starting from the ground power supply L FWD EP, passes through the contactor L EPC to the power conversion device L ATU 115VAC, which inputs the output power to the power conversion device TRU L28 VDC via the contactor L TRU Rly, supplies power to the Bus bar L28 VDC Bus, and then supplies power to the Bus bar R28 VDC Bus via the contactor LdcT and the contactor RdcT.
The power trends in the figures have been identified by the thick solid lines with arrows.
3. A power input path from the ground power supply R FWD EP to the Bus bar R28 VDC Bus.
Referring to fig. 6, there are two power input paths from the ground power source R FWD EP to the Bus bar R28 VDC Bus, corresponding to two priorities:
1) Priority 1: the contactor repc and the contactor rtru Rly are closed, and the power source from the ground power source rfwd EP reaches the power conversion device R ATU 115VAC via the contactor repc, which inputs the output power to the power conversion device TRU R28 VDC via the contactor rtru Rly, supplying the Bus bar R28 VDC Bus.
2) Priority 2: closing contactor R EPC, contactor R BSB, contactor RacT, contactor LacT, contactor L BSB, contactor L TRU Rly, contactor LdcT, and contactor RdcT, starting from ground power supply R FWD EP, reaching Bus bar R115 VAC Bus via contactor R EPC and contactor R BSB, being coupled to Bus bar L115 VAC Bus via contactor RacT and contactor LacT, and thereafter being input to power conversion device L ATU 115VAC via contactor L BSB, the output power of the latter being input to power conversion device TRU L28 VDC via contactor L TRU Rly, supplying power to Bus bar L28 VDC Bus, and then supplying power to Bus bar R28 VDC Bus via contactor LdcT and contactor RdcT.
The flow direction of the power flow of the two power paths has been identified in the figure by the thick solid lines with arrows.
Referring to fig. 7, the Bus bar L28 VDC Bus has two power sources, one is the power conversion unit TRU L28 VDC and the other is the Bus bar R28 VDC Bus. The two power sources correspond to two priorities, respectively.
Referring to fig. 8, the Bus bar R28 VDC Bus and the power input of the power conversion unit TRU L28 VDC have three sources, namely, bus bar L235 VAC Bus, ground power source L FWD EP and ground power source R FWD EP, which constitute three indirect power sources of the Bus bar L28 VDC Bus. The priorities of these three indirect power input sources are equivalent. In the figure, the trend of the power source has been identified by a thick solid line with an arrow. If the power sources exist at the same time, the power source which is turned ON last time has the 1 st priority.
These three power sources all have two possible power paths up to the Bus bar L28 VDC Bus, only one of which is shown in fig. 8, and the following sections will illustrate the two power paths, respectively.
1. The power path from the L235 VAC Bus to the L28 VDC Bus.
Referring to fig. 9, there are two power input paths from Bus L235 VAC Bus to Bus L28 VDC Bus, corresponding to two priorities:
1) Priority 1: the contactor L ATUC and the contactor L TRU Rly are closed, and the power supply is supplied from the Bus bar L235 VAC Bus to the power conversion device TRU L28 VDC via the contactor L ATUC and the contactor L TRU Rly.
2) Priority 2: closing the contactor L BTB, the contactor R ATUC, the contactor ESS ISO Rly, the contactor E1 TRU ISO Rly and the contactor L TRU Rly, enabling the contactor to reach the Bus bar R235 VAC Bus from the Bus bar L235 VAC Bus through the contactor L BTB and the contactor R BTB, enabling the contactor to reach the Bus bar 235VAC Bus through the contactor R ATUC and the contactor ESS ISO Rly, and enabling the contactor E1 TRU Rly, the contactor E1 TRU ISO Rly and the contactor L TRU ESS Rly to reach the power conversion device TRU L28 VDC to supply power for the Bus bar L28 VDC Bus.
The power trend in the figure has been identified by the thick solid line with an arrow.
2. A power path from the ground power supply L FWD EP to the Bus L28 VDC Bus.
Referring to fig. 10, a power path from the ground power source L FWD EP to the Bus bar L28 VDC Bus is inputted.
There are two power input paths from the ground power source LFWD EP to the Bus L28 VDC Bus, corresponding to two priorities:
1) Priority 1: closing the contactor L EPC and the contactor L TRU Rly, and supplying power to the L28 VDC Bus from the ground power supply L FWD EP to the L ATU 115VAC through the contactor L EPC and then to the TRU L28 VDC through the L TRU Rly;
2) Priority 2: closing contactor L EPC, contactor L BSB, contactor LacT, contactor RacT, contactor R BSB, contactor R TRU Rly, contactor RdcT and contactor LdcT, from ground power supply L FWD EP, via contactor L EPC, contactor L BSB to Bus L115 VAC Bus, via contactor LacT and contactor RacT to Bus R115 VAC Bus, via contactor R BSB to power conversion device R ATU 115VAC, via contactor R TRU Rly to power conversion device TRU R28 VDC to Bus R28 VDC Bus, via contactor RdcT and contactor LdcT to Bus L28 VDC Bus.
The power trend in the figure has been identified by the thick solid line with an arrow.
3. A power path from the ground power supply R FWD EP to the Bus L28 VDC Bus.
Referring to fig. 11, there are two power input paths from the ground power source rfwd EP to the Bus bar L28 VDC Bus, corresponding to the two priorities, respectively.
1) Priority 1: closing the contactor R EPC, the contactor R BSB, the contactor RacT, the contactor LacT, the contactor L BSB and the contactor L TRU Rly, enabling the ground power supply R FWD EP to reach the Bus bar R115 VAC Bus through the contactor R EPC and the contactor R BSB, enabling the ground power supply to reach the Bus bar L115 VAC Bus through the contactor RacT and the contactor LacT, enabling the ground power supply to reach the electric energy conversion device L ATU 115VAC through the contactor L BSB, enabling the ground power supply to reach the power conversion device TRU L28 VDC through the contactor L TRU Rly, and supplying power to the Bus bar L28 VDC Bus.
2) Priority 2: closing the contactor repc, the contactor rtru Rly, the contactor RdcT and the contactor LdcT, reaching the power conversion device R ATU 115VAC from the ground power supply rfwd EP via the contactor repc, then reaching the power conversion device TRU R28 VDC via the contactor rtru Rly, supplying power to the Bus bar R28 VDC Bus, and then reaching the Bus bar L28 VDC Bus via the contactor RdcT and the contactor LdcT.
The power trend in the figure has been identified by the thick solid line with an arrow.
The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present invention may be better understood. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (1)
1. The power input priority structure of the right and left normal direct current distribution bus bars of the airplane power supply is characterized by comprising,
bus bar R28 VDC Bus selectively powered by one of power conversion device TRU R, bus bar L28 VDC Bus, ground power source R FWD EP, ground power source L FWD EP, and Bus bar R235 VAC Bus; the power conversion device TRU R and the Bus bar L28 VDC Bus are direct power sources, and the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar R235 VAC Bus are indirect power sources; the power supply priority of the direct power source is higher than that of the indirect power source; in the direct power source, the power supply priority of the power conversion device TRU R is higher than that of the Bus bar L28 VDC Bus; in the indirect power source, the power supply priority of the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar R235 VAC Bus is the same; the method comprises the steps of,
a Bus bar L28 VDC Bus selectively powered by one of the power conversion device TRU L, the Bus bar R28 VDC Bus, the ground power supply R FWD EP, the ground power supply L FWD EP, and the Bus bar L235 VAC Bus; the power conversion device TRU L and the Bus bar R28 VDC Bus are direct power sources, and the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar L235 VAC Bus are indirect power sources; the power supply priority of the direct power source is higher than that of the indirect power source; in the direct power source, the power supply priority of the power conversion device TRU L is higher than that of the Bus bar R28 VDC Bus; in the indirect power source, the power supply priority of the ground power supply R FWD EP, the ground power supply L FWD EP and the Bus bar L235 VAC Bus is the same;
if three indirect power sources of the Bus bar R28 VDC Bus exist at the same time, the power source which is turned ON last time is optimal; if three indirect power sources of the Bus bar L28 VDC Bus exist at the same time, the power source which is turned ON last time is optimal;
for the Bus bar R28 VDC Bus, the power supply priority of the ground power source R FWD EP intermediate path power conversion device TRU R is higher than that of the path Bus bar L28 VDC Bus, the power supply priority of the ground power source L FWD EP intermediate path power conversion device TRU R is higher than that of the path Bus bar L28 VDC Bus, and the power supply priority of the Bus bar R235 VAC Bus intermediate path power conversion device TRU R is higher than that of the path Bus bar L28 VDC Bus; for the Bus bar L28 VDC Bus, the power supply priority of the ground power supply L FWD EP intermediate path power supply conversion device TRU L is higher than that of the path Bus bar R28 VDC Bus, and the power supply priority of the Bus bar L235 VAC Bus intermediate path power supply conversion device TRU L is higher than that of the path Bus bar R28 VDC Bus;
the contactor L GCB, the contactor R GCB, the contactor L BTB, the contactor APB and the contactor R BTB are also included; the first end of the contactor L GCB is connected with the main generator GEN L, and the second end of the contactor L GCB is connected with the Bus bar L235 VAC Bus; the first end of the contactor R GCB is connected with the main generator GEN R, and the second end of the contactor R GCB is connected with the Bus bar R235 VAC Bus; the first end of the contactor L BTB is connected with the Bus bar L235 VAC Bus, the first end of the contactor APB is connected with the auxiliary generator APU GEN, the first end of the contactor R BTB is connected with the Bus bar R235 VAC Bus, and the second end of the contactor L BTB is respectively connected with the second end of the contactor ATB and the second end of the contactor R BTB;
further, the contactor L ATUC, the electric energy conversion device L ATU, the contactor L BSB, the contactor R ATUC, the electric energy conversion device R ATU, the contactor R BSB, the contactor L EPC, the contactor R EPC, the contactor LacT, the contactor RacT, the contactor LdcT, and the contactor RdcT; the first end of the contactor L ATUC is connected with the Bus bar L235 VAC Bus, the second end of the contactor L ATUC is connected with the electric energy conversion device L ATU, the electric energy conversion device L ATU is connected with the first end of the contactor L BSB and the first end of the contactor L EPC, the second end of the contactor L BSB is connected with the Bus bar L115 VAC Bus, and the second end of the contactor L EPC is connected with the ground power supply L FWD EP; the first end of the contactor R ATUC is connected with the Bus bar R235 VAC Bus, the second end of the contactor R ATUC is connected with the electric energy conversion device R ATU, the electric energy conversion device R ATU is connected with the first end of the contactor R BSB and the first end of the contactor R EPC, the second end of the contactor R BSB is connected with the Bus bar R115 VAC Bus, and the second end of the contactor R EPC is connected with the ground power supply R FWD EP; the first end of the contactor LacT is connected with the Bus bar L115 VAC Bus, the second end of the contactor LacT is connected with the first end of the contactor RacT, and the second end of the contactor RacT is connected with the Bus bar R115 VAC Bus; a contactor L TRU Rly, a power supply conversion device TRU L, a contactor R TRU Rly, and a power supply conversion device TRU R; the first end of the contactor L TRU Rly is connected to the second end of the contactor L ATUC, the second end of the contactor L TRU Rly is connected to the power conversion device TRU L, which in turn is connected to the Bus bar L28 VDC Bus; the first end of the contactor R TRU Rly is connected with the second end of the contactor R ATUC, the second end of the contactor R TRU Rly is connected with the power conversion device TRU R, which is in turn connected with the Bus bar R28 VDC Bus; the first end of the contactor LdcT is connected to the Bus bar L28 VDC Bus, the second end of the contactor LdcT is connected to the first end of the contactor RdcT, and the second end of the contactor RdcT is connected to the Bus bar R28 VDC Bus.
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