CN108288853A - Aircraft DC power supply system and method for supplying power to - Google Patents
Aircraft DC power supply system and method for supplying power to Download PDFInfo
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- CN108288853A CN108288853A CN201810300438.XA CN201810300438A CN108288853A CN 108288853 A CN108288853 A CN 108288853A CN 201810300438 A CN201810300438 A CN 201810300438A CN 108288853 A CN108288853 A CN 108288853A
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Classifications
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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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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- Supply And Distribution Of Alternating Current (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of aircraft DC power supply system and method for supplying power to.The system includes：At least two generators and the electric machine controller being connected respectively, for generating and DC power output is to a corresponding power flow concentration item；At least two power flow concentration items are connected by controllable switch with corresponding at least two electric machine controller respectively, are connected with each other between a two neighboring power flow concentration item；External dc power is connect by controllable switch with a power flow concentration item, for powering to a power flow concentration item in engine start condition；Direct current energy conversion equipment, input terminal are connect with a power flow concentration item, and output end is connect with critical loads busbar, for being converted and being exported to critical loads busbar to the direct current energy on a power flow concentration item；Critical loads busbar, for powering to corresponding critical loads.The present invention improves the power density of system, the continuity power supply of power supply system when realizing separate unit or more generator failures.
Description
Technical field
The present embodiments relate to aviation power supply technology more particularly to a kind of aircraft DC power supply system and method for supplying power to.
Background technology
Existing aircraft uses ac power supply system, that is, generator is used to generate threephase AC electric energy and by threephase AC electric energy
The system for being transferred to each power load.Include voltage changer, the exchange that generator is sent out in aircraft AC electrical power supply system
Electric energy, conversion to the different a variety of AC energy forms of electric voltage frequency.Simultaneously as power load has the electricity consumption of direct current energy to need
It asks, for example, the starting system for engine start, required inputing power is direct current energy, therefore, aircraft AC electrical power supply
It can also use AC energy conversion equipment by three-phase alternating current electric rectification for direct current energy in system.
Multiple generators are generally included in aircraft AC electrical power supply system and are carried out at the same time power generation, and each generator, which uses, belongs to it
Specific busbar carries out electric energy transmission and distributes to load, it is believed that each generator and its power distribution equipment constitute one
Independent sub- power supply system does not have electric connecting relation in normal work between sub- power supply system, when one of son power supply
When system jam, after the electrical connection between the generator and busbar in the sub- power supply system need to be first turned off, then connect
Logical bypass subsystem and the busbar in this system realize Fault Isolation and electricity by busbar in electrical energy transportation so far system
Net reconstruct.
Since the starting inputing power of engine starting system is direct current energy, input power reaches 100kW, therefore in order to full
The electrical energy demands of direct current power load in sufficient DC power-supply system need AC energy conversion equipment higher than 100kW by big work(
Rate AC rectification is direct current energy, and this adds increased system weights, reduce the power density of system.And since exchange supplies
There are frequencies and phase angle difference between AC energy caused by different generators in electric system, when wherein a generator occurs
After failure, needs to complete the contactor closed action between busbar, just can turn on the electrical connection between busbar, because
This, the temporary missing of electric energy when causing failure.
Invention content
In view of this, a kind of aircraft DC power supply system of offer of the embodiment of the present invention and method of supplying power to, to improve system
Power density, the continuity power supply of power supply system when realizing separate unit or more generator failures.
In a first aspect, an embodiment of the present invention provides a kind of aircraft DC power supply system, the system comprises：
At least two engines, corresponding at least two engines at least two generators and at least two generators point
At least two electric machine controllers not being correspondingly connected with, for generating and DC power output is to a corresponding power flow concentration item,
The electric machine controller is additionally operable to control the controllable switch of motor side, and the controllable switch of the motor side includes motor control
Controllably opening between the controllable switch and external dc power and a power flow concentration item between device processed and a power flow concentration item
It closes；
At least two power flow concentration items are connected by controllable switch with corresponding at least two electric machine controller respectively
It connects, is connected with each other between a two neighboring power flow concentration item, for powering to electric machine controller in engine start condition, and
It powers to direct current energy conversion equipment in electrical power generators state；
External dc power passes through power in controllable switch and at least two power flow concentration items
Busbar connects, for powering to a power flow concentration item in engine start condition；
Direct current energy conversion equipment, input terminal are connect with a power flow concentration item, and output end converges with critical loads
Item connects, and is converted and is exported negative to key for the direct current energy on power flow concentration item of electrical power generators state pair
Carry busbar；
Critical loads busbar, connect with critical loads, for powering to corresponding critical loads.
Second aspect, the embodiment of the present invention additionally provide a kind of method of supplying power to of aircraft DC power supply system, the method
Including：
In electrical power generators state, at least two electric machine controllers control electric machine controller and a power flow concentration item
Between controllable switch connect, and control a generator at least two generator and corresponding electric machine controller work
Make in voltage mode control, other generators and corresponding electric machine controller work in power control mode；
When the generator and/or corresponding electric machine controller that work in power control mode break down, the electricity is cut off
Controllable switch between machine controller and a power flow concentration item；
When the generator and/or corresponding electric machine controller that work in voltage mode control break down, the electricity is cut off
Controllable switch between machine controller and a power flow concentration item, and by other generators a generator and corresponding control
The operating mode of device processed is switched to voltage mode control；
Wherein, voltage mode control refers to electric machine controller using the output DC voltage value of generator as control instruction,
The voltage of the output voltage of stable generator and a power flow concentration item up-regulation pressure point；Power control mode refers to electric machine controller
Using the output current value of generator as control instruction, the given output power value of control generator.
Technical solution described in the embodiment of the present invention, by least two generators and be connected respectively at least two
Electric machine controller generates and DC power output is to a power flow concentration item, and at least two power flow concentration items are respectively by can
Control switch is connected with corresponding at least two electric machine controller, is connected with each other between a two neighboring power flow concentration item, this is straight
The generator and electric machine controller direct output of DC current energy in power supply system are flowed, and in generator starting state by outer
Portion's DC power supply power supply, eliminates the AC energy conversion equipment in the prior art that rectification is carried out to AC energy, to carry
The high power density of system, due to being connected with each other between a two neighboring power flow concentration item, in separate unit or less than the power supply
When more generator failures of the generator quantity configured in system, can directly disengagement failure generator, shorten failure
Reconstitution time after generation, the continuity power supply of power supply system when realizing separate unit or more generator failures.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for aircraft DC power supply system that the embodiment of the present invention one provides；
Fig. 2 is a kind of structural schematic diagram of aircraft DC power supply system provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of flow chart of the method for supplying power to for aircraft DC power supply system that the embodiment of the present invention three provides.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is only used for explaining the present invention rather than limitation of the invention.It also should be noted that for the ease of
Description, only some but not all contents related to the present invention are shown in the drawings.
Embodiment one
Fig. 1 is a kind of structural schematic diagram for aircraft DC power supply system that the embodiment of the present invention one provides, the present embodiment institute
The aircraft DC power supply system stated suitable for the power supply aircraft, this system provides one kind from electric energy generating system (including
Generator and electric machine controller) between distribution system (including busbar and direct current energy conversion equipment) based on direct current energy
The technology for generating and distributing.As shown in Figure 1, the aircraft DC power supply system described in the present embodiment includes：
At least two engine (not shown)s correspond at least two generators 10 of at least two engines (in figure
By taking two generators as an example) and at least two electric machine controllers 20 that are connected respectively at least two generators 10, it is used for
It generates and DC power output is to a corresponding power flow concentration item 30, electric machine controller 20 is additionally operable to open the controllable of motor side
Close and 70 controlled, the controllable switch 70 of the motor side include between electric machine controller 20 and a power flow concentration item 30 can
Control the controllable switch 70 between switch 70 and external dc power 40 and a power flow concentration item 30；
At least two power flow concentration items 30 pass through controllable switch 70 and corresponding at least two electric machine controller respectively
20 connections, are connected with each other between a two neighboring power flow concentration item 30, in engine start condition to electric machine controller
20 power supplies, and power to direct current energy conversion equipment 50 in 10 generating state of generator；
External dc power 40 passes through one one in controllable switch 70 and at least two power flow concentration items 30
Secondary power flow concentration item 30 connects, for powering to a power flow concentration item 30 in engine start condition；
Direct current energy conversion equipment 50, input terminal are connect with a power flow concentration item 30, output end and critical loads
Busbar 60 connect, for the direct current energy on generator power flow concentration item 30 of 10 generating state pair carry out conversion and it is defeated
Go out to critical loads busbar 60；
Critical loads busbar 60, connect with critical loads, for powering to corresponding critical loads.
Wherein, the corresponding generator of each driven by engine is rotated, to generate electricity.Each generator 10 has pair
Mating electric machine controller 20 is answered, the mating electric machine controller of the correspondence, the corresponding mating hair of the control of electric machine controller 20 are connected
Motor 10.Wherein, generator 10 can be alternating current generator, or dc generator.It is alternative electric generation in generator 10
When machine, working forms include that alternating current generator adds uncontrollable rectifier or alternating current generator to add controlled rectification, wherein are in working forms
When alternating current generator adds uncontrollable rectifier, corresponding electric machine controller 20 is used to control the output voltage for keeping exchange side so that defeated
Go out voltage to keep stablizing；When working forms are that alternating current generator adds controlled rectification, the voltage variable of generator output, frequency can
Become, corresponding electric machine controller 20 is used to carry out rectification to the alternating current that generator exports, and ensures output stable DC energy.
When generator 10 is dc generator, corresponding electric machine controller 20 is used for pressure regulation, controls direct current amplitude, keeps voltage steady
Determine, fluctuate.Generator 10 and the direct current energy of corresponding electric machine controller output are high voltage direct current electric energy, as DC voltage is
540 volts.At least two electric machine controller 20 is active and standby each other, it is however generally that, electric machine controller is corresponding mating generator
And the master controller of controllable switch, it is the spare controller of other generators and controllable switch, in electric machine controller normal operation
When, mating generator and controllable switch are controlled, in electric machine controller failure, by other electric machine controllers to the event
The generator and controllable switch that the electric machine controller of barrier is mating are controlled.
Power flow concentration item 30 is high voltage direct current busbar.Wherein, busbar is also known as laminated bus plate, is that one kind is more
The power module electric connecting part of layer laminate structure at the electric power distribution that can connect multiple circuits, has repeatable electrical resistance
Energy, low induction reactance, anti-interference, good reliability save the features such as space and assembly are succinct quick.Power flow concentration item also connects
High voltage direct current load is connect, is additionally operable to high voltage direct current load supplying.
The controllable switch 70 of motor side is controlled by corresponding electric machine controller 20.Optional controllable switch 70 includes contact
Device or solid-state power controller.Contactor is divided into A.C. contactor and D.C. contactor, applied to electric power, distribution and uses electric field
It closes.Contactor refers to flowing through current induced magnetic field using coil in industrial electro, makes contact closure, to reach the electricity of control load
Device.In embodiments of the present invention, contactor is D.C. contactor.Solid-state power controller (Solid-State Power
Controller, abbreviation SSPC) it is that the intelligence of circuit protection function of the conversion function and breaker for integrating relay is opened
Close equipment, have it is contactless, without electric arc, noiseless, response is fast, electromagnetic interference is small, long lifespan, reliability are high and convenient for calculating
The advantages that machine remote control.
Optional external dc power 40 includes ground power supply, battery or super capacitor, it is, of course, also possible to include other direct currents
Power supply.Optional battery includes lead-acid battery, lithium battery, fuel cell or solar cell, it is, of course, also possible to including other electricity
Pond.An electric machine controller at least two electric machine controllers controls between external dc power 40 and a power flow concentration item
Controllable switch, in engine start condition, electric machine controller controls controllable switch closure, and in electrical power generators state,
The electric machine controller controls controllable switch disconnection.
Direct current energy conversion equipment 50 is used to the high voltage direct current electric energy on a power flow concentration item being converted to corresponding key
The electric energy needed is loaded, optional includes direct current energy device for transformer and/or electrical energy changer；Correspondingly, critical loads converge
It includes low-voltage direct busbar and/or aC BUS to flow item 60；The critical loads include low-voltage direct load and/or exchange
Load；The direct current energy device for transformer, output end are connect with low-voltage direct busbar, for converting high voltage direct current electric energy
For low-voltage direct electric energy (such as DC voltage is 28 volts), and export to low-voltage direct busbar；The electrical energy changer, output
End is connect with aC BUS, for direct current energy to be converted to AC energy, and is exported to aC BUS；The low-pressure direct
Busbar is flowed to be used for low-voltage direct load supplying；The aC BUS is used to power to AC load.
The operation principle of the DC power-supply system：In engine start condition, first from external dc power 40 at least two
An a power flow concentration item 30 is powered, and the controllable switch 70 for connection of being corresponding to it is connected by electric machine controller 20, by primary
Power flow concentration item 30 provides control electric energy to corresponding electric machine controller 20, and electric machine controller 20 is by the direct current energy inversion of input
It for threephase AC electric energy and exports to corresponding generator 10, generator is made to generate starting torque, start engine and turn to igniting
Speed is lighted a fire.After engine ignition, electrical power generators state is just run on, driven by engine generator 10 is revolved
Turn so that generator 10 sends out frequency-changing AC electric energy, and AC energy is direct current energy by 20 rectification of corresponding electric machine controller.
When electrical power generators state, the direct current energy parallel running of at least two electric machine controllers 20 output, one of generator 10
And corresponding electric machine controller 20 works in voltage mode control, other generators 10 and corresponding electric machine controller 20 work in
Power control mode.When a failure occurs it, if failure betides the generator 10 of power control mode and/or corresponding motor control
When device 20 processed, the controllable switch 70 between the electric machine controller 20 and a power flow concentration item 30 is cut off, at this time due to all one
Secondary power flow concentration item 30 is in electrical communication state, therefore the direct current energy on a power flow concentration item 30 is continuous.If therefore
Barrier is when betiding the generator 10 of voltage mode control and/or corresponding electric machine controller 20, cut off the electric machine controller 20 with
Controllable switch 70 between power flow concentration item 30, and by the generator of one of power control mode 10 and corresponding electricity
The operating mode of machine controller 20 is switched to voltage mode control, stablizes the direct current of a power flow concentration item 30 instead of faulty equipment
Voltage.After occurring due to failure, it is only necessary to switch failure generator and corresponding electric machine controller and power flow concentration item it
Between electrical connection, shorten failure occur after reconstitution time.
Technical solution described in the present embodiment passes through at least two generators and at least two motors being connected respectively
Controller generates and DC power output is to a power flow concentration item, and at least two power flow concentration items are respectively by controllably opening
It closes and is connected with corresponding at least two electric machine controller, is connected with each other between a two neighboring power flow concentration item, which supplies
Generator in electric system and electric machine controller direct output of DC current energy, and in generator starting state by external straight
Power supply power supply is flowed, the AC energy conversion equipment in the prior art for carrying out rectification to AC energy is eliminated, to improve
The power density of system, due to being connected with each other between a two neighboring power flow concentration item, in separate unit or less than the power supply system
When more generator failures of the generator quantity of middle configuration, can directly disengagement failure generator, shorten failure
Reconstitution time afterwards, the continuity power supply of power supply system when realizing separate unit or more generator failures.
Based on the above technical solution, optionally, two neighboring primary at least two power flow concentration items
It is connected by controllable switch between power flow concentration item；The electric machine controller is additionally operable between a corresponding power flow concentration item
Controllable switch controlled.
In engine start condition and electrical power generators state, at least two electric machine controllers control a power flow concentration item
Between controllable switch be closed, break down in a power flow concentration item or the corresponding electrical equipment of a power flow concentration item
When, the controllable switch between a power flow concentration item and other power flow concentration items can be cut off, realizes Fault Isolation.
Based on the above technical solution, also optional to include：
Multiple controllable switches of load end, be connected between a power flow concentration item and direct current energy conversion equipment,
Between two neighboring critical loads busbar and between critical loads busbar and critical loads；
Load controller is controlled for multiple controllable switches to load end.
Specifically, multiple controllable switches of load end are connected to a power flow concentration item and direct current energy conversion equipment
Between, between two neighboring low-voltage direct busbar, low-voltage direct busbar and low-voltage direct load between, two neighboring exchange
Between busbar and between aC BUS and AC load.
Load controller connects multiple controllable switches of load end by controlling cable.If the controllable switch pair of load end
When the electrical equipment answered breaks down, load controller can cut off the controllable switch, to realize Fault Isolation.
Embodiment two
Fig. 2 is a kind of structural schematic diagram of aircraft DC power supply system provided by Embodiment 2 of the present invention, and the present embodiment is
Preferred embodiment on the basis of above-described embodiment.As shown in Fig. 2, the aircraft DC power supply system packet described in the present embodiment
It includes：Three engine (not shown)s, three generators 11,12,13 are corresponding mating with three generators 11,12,13 respectively
Three electric machine controllers 21,22,23 and three electric machine controllers 21,22,23 corresponding three power flow concentration items
31,32,33, two high voltage direct current electric energy turn the power transformer device 51 of low-voltage direct electric energy, high voltage direct current load 81, two
Direct current energy turns the electrical energy changer 52 of AC energy, two low-voltage direct busbars 61,62, two aC BUSs 63,
64, low-voltage direct load 82, AC load 83, external dc power 40, and connect the solid state power control of each electrical equipment
Device.
Wherein, as shown in Fig. 2, the solid state power that solid-state power controller 71,72,73,74,75,76 is motor side controls
Device, solid-state power controller 91-99 are the solid-state power controller of load end.Wherein, electric machine controller 21 can be used as solid-state work(
The master controller of rate controller 71,74,75, other electric machine controllers 22 and 23 can be used as solid-state power controller 71,74,75
Spare controller, electric machine controller 23 can be used as the master controller of solid-state power controller 73,76, other electric machine controllers 21 and
22 can be used as the spare controller of solid-state power controller 73,76, master of the electric machine controller 22 as solid-state power controller 72
Device is controlled, other electric machine controllers 21 and 23 can be used as the spare controller of solid-state power controller 72.Aircraft DC power supply system
System may also include two load controllers, the two load controllers are active and standby each other, pass through the solid-state of controlling cable and load end
Power controller 91-99 connections, a load controller as in Fig. 2 the solid-state power controller 91 in left side, 92,93,
94,95,96 master controller, the spare control as the solid-state power controller 91,92,93,97,98,99 on right side in Fig. 2
Device processed, master control of another load controller as the solid-state power controller 91,92,93,97,98,99 on right side in Fig. 2
Device processed, the spare controller as the solid-state power controller 91,92,93,94,95,96 in left side in Fig. 2.
The aircraft DC power supply system runs on engine start condition first, connects external dc power 40 and a work(
The solid-state power controller 75 of solid-state power controller 74, one times between power flow concentration item 31 and 32 between rate busbar 31,
And the solid-state power controller 76 between a power flow concentration item 32 and 33, first converged from external dc power 40 to a power
Item 31,32,33 is flowed to power.Be respectively turned on solid-state power controller 71,72,73, by a power flow concentration item 31,32,33 to
Three electric machine controllers 21,22,23 provide control electric energy, and three electric machine controllers 21,22,23 are respectively by the direct current energy of input
Inversion is that threephase AC electric energy is exported to three generators 11,12,13, so that generator is generated starting torque, starts corresponding
Engine is lighted a fire to fire speed.After engine ignition, which transfers to run on generator
Generating state.The solid-state power controller 74 between external dc power 40 and a power flow concentration item 31 is disconnected, three are started
Machine drives three generators 11,12,13 to be rotated respectively so that generator sends out frequency-changing AC electric energy, and AC energy is by three
It is direct current energy that a electric machine controller 21,22,23, which distinguishes rectification,.In electrical power generators state, solid-state power controller 71,
72,73 connection status, the direct current energy parallel running of three electric machine controllers 21,22,23 output, wherein electric machine controller are in
21 work in voltage mode control, and electric machine controller 22 and 23 works in power control mode.Connection solid-state power controller 91,
92,93 so that direct current energy inputing power device for transformer 51, high voltage direct current load in 81 and electrical energy changer 52,
In, high voltage direct current electric energy is transformed to low-voltage direct electric energy, output to 61 He of low-voltage direct busbar by power transformer device 51
In 62, it is connected to by solid-state power controller 94 between two low-voltage direct busbars 61 and 62.And pass through solid-state work(respectively
Rate controller 95 and 96 is powered to low-voltage direct load 82.High voltage direct current electric energy inversion is alternating current by electrical energy changer 52
Can, in output to aC BUS 63 and 64, two aC BUSs 63 are connected to in 64 by solid-state power controller 97,
And it is powered respectively to AC load 83 by solid-state power controller 98 and 99.
(in electrical power generators state) when system normal operation, when work in voltage mode control generator 11 and/
Or electric machine controller 21 cuts off solid-state power controller 71, by generator 12 and electric machine controller 22 by work(when breaking down
Rate control mode switch is voltage mode control, if further generator 12 and/or electric machine controller 22 also break down, is cut off
Generator 13 and electric machine controller 23 are switched to voltage mode control by solid-state power controller 72 by power control mode.
When system normal operation, when event occurs for the generator 12 and/or electric machine controller 22 that work in power control mode
When barrier, solid-state power controller 72 is cut off, if further generator 13 and/or electric machine controller 23 also break down, cut-out is solid
State power controller 73.
When system normal operation, when event occurs for the generator 12 and/or electric machine controller 22 that work in power control mode
When barrier, solid-state power controller 72 is cut off, if further working in voltage mode control generator 11 and/or electric machine controller 21
Also it breaks down, cuts off solid-state power controller 71, generator 13 and electric machine controller 23 are switched by power control mode
For voltage mode control.
When system normal operation, when event occurs for the generator 13 and/or electric machine controller 23 that work in power control mode
When barrier, solid-state power controller 73 is cut off, if further generator 12 and/or electric machine controller 22 also break down, cut-out is solid
State power controller 72.
When system normal operation, when event occurs for the generator 13 and/or electric machine controller 23 that work in power control mode
When barrier, solid-state power controller 73 is cut off, if further working in the generator 11 and/or electric machine controller of voltage mode control
21 also break down, and cut off solid-state power controller 71, generator 12 and controller 22 are switched to by power control mode
Voltage mode control.
Technical solution described in the present embodiment eliminates AC energy conversion equipment in the prior art, improves system
Power density, the power supply system each parallel operation of generator in power supply realizes the power supply of system continuity, and send out by controller
Motor operation is in voltage mode control or power control mode, and voltage control dispute problem, real caused by avoiding electric appliance connection
High efficiency and the safety of power grid control are showed.
Embodiment three
Fig. 3 is a kind of flow chart of the method for supplying power to for aircraft DC power supply system that the embodiment of the present invention three provides, this reality
It applies example and the aircraft DC power supply system that can be provided by any embodiment of the present invention the power supply in aircraft, this method is provided
It executes, specifically comprises the following steps：
Step 110, in electrical power generators state, at least two electric machine controllers control electric machine controller and a work(
Controllable switch between rate busbar is connected, and controls a generator and corresponding motor at least two generator
Controller works in voltage mode control, other generators and corresponding electric machine controller work in power control mode.
Wherein, voltage mode control refers to electric machine controller using the output DC voltage value of generator as control instruction,
The voltage of the output voltage of stable generator and a power flow concentration item up-regulation pressure point；Power control mode refers to electric machine controller
Using the output current value of generator as control instruction, the given output power value of control generator reaches power of distribution
The purpose of power on busbar.
In electrical power generators state, at least two electric machine controllers control corresponding electric machine controller and a power respectively
Controllable switch between busbar is connected, and controls a generator at least two generators and corresponding electric machine controller
Voltage mode control is worked in, other generators and corresponding electric machine controller work in power control mode.Each motor control
Device processed can preserve the operating mode of itself and other electric machine controllers, and a generator and right is kept so as to control always
The electric machine controller answered works in voltage mode control.By controlling the operating mode of generator, can be made to avoid electrical communication
At voltage control dispute problem.
Before this step, it is operate on engine start condition first, at least two electric machine controllers control is outer
Controllable switch between portion's DC power supply and a power flow concentration item is connected, control electric machine controller and power flow concentration item it
Between controllable switch connect, external dc power by a power flow concentration item to electric machine controller provide control electric energy, at least
The direct current energy inversion of input is threephase AC electric energy and exported into corresponding generator by two electric machine controllers, makes power generation
Machine generates starting torque, starts engine to fire speed, lights a fire, after engine ignition, DC power-supply system operation
In electrical power generators state.In electrical power generators state, can close between external dc power and a power flow concentration item
Controllable switch.
Step 120, when the generator and/or corresponding electric machine controller that work in power control mode break down,
Cut off the controllable switch between the electric machine controller and a power flow concentration item.
When electric machine controller detects corresponding alternator failure, if the generator and electric machine controller work
In power control mode, then the electric machine controller cuts off the controllable switch between a power flow concentration item, and notifies other electricity
Machine controller；When electric machine controller detects that other electric machine controllers for working in power control mode break down, cut-out
Controllable switch between the electric machine controller of failure and a power flow concentration item.
Step 130, when the generator and/or corresponding electric machine controller that work in voltage mode control break down,
Cut off the controllable switch between the electric machine controller and a power flow concentration item, and by other generators a generator and
The operating mode of corresponding controller is switched to voltage mode control.
When electric machine controller detects corresponding alternator failure, if the generator and electric machine controller work
In voltage mode control, then the controllable switch between electric machine controller cut-out and a power flow concentration item, from working in power
An electric machine controller is selected in the electric machine controller of control model, and the electric machine controller of selection is notified to be switched to voltage control
Pattern, and other is notified to work in the electric machine controller of power control mode, selected electric machine controller controls corresponding hair
Motor and itself operating mode is switched to voltage mode control by power control mode；When the electricity for working in power control mode
When machine controller detects that the electric machine controller for working in voltage mode control breaks down, the electric machine controller of disengagement failure with
Controllable switch between power flow concentration item, and the operating mode of itself and corresponding generator is cut by power control mode
It is changed to voltage mode control, and other is notified to work in the electric machine controller of power control mode.
The technical solution of the present embodiment will at least two pairs hairs by aircraft DC power supply system in electrical power generators state
A generator and corresponding electric machine controller in motor and corresponding electric machine controller work in voltage mode control, other
Generator and corresponding electric machine controller work in power control mode, confused so as to avoid voltage control caused by electrical communication
Strive problem.
Based on the above technical solution, optionally, two neighboring primary at least two power flow concentration items
It is connected by controllable switch between power flow concentration item；
At least two electric machine controller also controls the connection of the controllable switch between a corresponding power flow concentration item
Or it disconnects.
In engine start condition and electrical power generators state, at least two electric machine controllers control a power flow concentration item
Between controllable switch connect, only occur in a power flow concentration item or the corresponding electrical equipment of a power flow concentration item therefore
When barrier, the controllable switch between a power flow concentration item and other power flow concentration items is cut off, realizes Fault Isolation.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of aircraft DC power supply system, which is characterized in that the system comprises：
At least two engines, at least two generators of corresponding at least two engines and right respectively at least two generators
At least two electric machine controllers that should be connected, it is described to a corresponding power flow concentration item for generating simultaneously DC power output
Electric machine controller is additionally operable to control the controllable switch of motor side, and the controllable switch of the motor side includes electric machine controller
The controllable switch between controllable switch and external dc power and a power flow concentration item between a power flow concentration item；
At least two power flow concentration items are connected by controllable switch with corresponding at least two electric machine controller, phase respectively
It is connected with each other between adjacent two power flow concentration items, for powering to electric machine controller in engine start condition, and is sending out
Electric power generation state is powered to direct current energy conversion equipment；
External dc power passes through power flow concentration in controllable switch and at least two power flow concentration items
Item connects, for powering to a power flow concentration item in engine start condition；
Direct current energy conversion equipment, input terminal are connect with a power flow concentration item, and output end connects with critical loads busbar
It connects, is converted and exported to critical loads for the direct current energy on power flow concentration item of electrical power generators state pair and converged
Flow item；
Critical loads busbar, connect with critical loads, for powering to corresponding critical loads.
2. system according to claim 1, which is characterized in that two neighboring one at least two power flow concentration items
It is connected by controllable switch between secondary power flow concentration item；
The controllable switch that the electric machine controller is additionally operable between a corresponding power flow concentration item controls.
3. system according to claim 1, which is characterized in that the direct current energy conversion equipment includes direct current energy transformation
Device device and/or electrical energy changer；
Correspondingly, the critical loads busbar includes low-voltage direct busbar and/or aC BUS；The critical loads packet
Include low-voltage direct load and/or AC load；
The direct current energy device for transformer, output end are connect with low-voltage direct busbar, for converting high voltage direct current electric energy
For low-voltage direct electric energy, and export to low-voltage direct busbar；
The electrical energy changer, output end are connect with aC BUS, for direct current energy to be converted to AC energy, and it is defeated
Go out to aC BUS；
The low-voltage direct busbar is used for low-voltage direct load supplying；
The aC BUS is used to power to AC load.
4. system according to claim 1, which is characterized in that a power flow concentration item is additionally operable to negative to high voltage direct current
Carry power supply.
5. system according to claim 1, which is characterized in that further include：
Multiple controllable switches of load end are connected between a power flow concentration item and direct current energy conversion equipment, are adjacent
Between two critical loads busbars and between critical loads busbar and critical loads；
Load controller is controlled for multiple controllable switches to load end.
6. according to any systems of claim 1-5, which is characterized in that the controllable switch includes contactor or solid-state work(
Rate controller.
7. according to any systems of claim 1-5, which is characterized in that the external dc power include ground power supply,
Battery or super capacitor.
8. system according to claim 7, which is characterized in that the battery includes lead-acid battery, lithium battery, fuel cell
Or solar cell.
9. a kind of method of supplying power to of DC power-supply system as described in claim 1, which is characterized in that the method includes：
Between electrical power generators state, at least two electric machine controllers control electric machine controller and a power flow concentration item
Controllable switch connect, and control a generator at least two generator and corresponding electric machine controller works in
Voltage mode control, other generators and corresponding electric machine controller work in power control mode；
When the generator and/or corresponding electric machine controller that work in power control mode break down, the motor control is cut off
Controllable switch between device processed and a power flow concentration item；
When the generator and/or corresponding electric machine controller that work in voltage mode control break down, the motor control is cut off
Controllable switch between device processed and a power flow concentration item, and by other generators a generator and corresponding controller
Operating mode be switched to voltage mode control；
Wherein, voltage mode control refers to electric machine controller using the output DC voltage value of generator as control instruction, stabilization
The voltage of the output voltage of generator and a power flow concentration item up-regulation pressure point；Power control mode, which will refer to electric machine controller, to be sent out
The output current value of motor is as control instruction, the given output power value of control generator.
10. according to the method described in claim 9, it is characterized in that, two neighboring at least two power flow concentration items
It is connected by controllable switch between power flow concentration item；
What at least two electric machine controller also controlled the controllable switch between a corresponding power flow concentration item connects on-off
It opens.
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