CN108111075A - A kind of electricity-generating method and system - Google Patents
A kind of electricity-generating method and system Download PDFInfo
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- CN108111075A CN108111075A CN201711423557.6A CN201711423557A CN108111075A CN 108111075 A CN108111075 A CN 108111075A CN 201711423557 A CN201711423557 A CN 201711423557A CN 108111075 A CN108111075 A CN 108111075A
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- synchronous generator
- module
- bus
- voltage
- electricity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
- H02P9/305—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices controlling voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/45—Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2103/00—Controlling arrangements characterised by the type of generator
- H02P2103/20—Controlling arrangements characterised by the type of generator of the synchronous type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of electricity-generating method and system, wherein, the system comprises the first synchronous generator, first axle hair rectification module and inverter modules.The power generation torque of the first synchronous generator is tuned up when the generating voltage or generation frequency of the first synchronous generator reduce by first axle hair rectification module, the power generation torque of the first synchronous generator is turned down in generating voltage or the generation frequency rise of the first synchronous generator, to keep the stabilization of DC bus-bar voltage.So that the alternating current voltage of electricity generation system output is stablized, without Industrial Frequency Transformer, system cost is reduced.
Description
Technical field
The present invention relates to power fields, and in particular to a kind of electricity-generating method and system.
Background technology
As shown in Figure 1, traditional double Shaft-Generators are two wheels connects two electrical excitations synchronously hair by belt
Motor, two electrical excitation synchronous generators are respectively that two three phase rectifier units provide three-phase alternating current, two three phase rectifier lists
The AC rectification of fluctuation is direct current (DC bus-bar voltage) by member, since the speed of wheel can fluctuate at any time, so synchronous
The speed of generator can also fluctuate therewith, just have to reduce generating voltage by adjusting the exciting current of electro-magnetic motor
It fluctuates, the DC bus-bar voltage after two three phase rectifiers is in parallel, and DC bus-bar voltage is converted to constant three-phase by inversion unit
Alternating voltage is AC load (such as compressor) power supply on vehicle.Rectification wherein in this programme can be kinds of schemes, specifically such as
Under：
1) rectification uses three-phase main-frequency diode rectification or silicon controlled rectifier, is then filtered by direct current buffering and DC energy storage
Ripple capacitance obtains dc bus, this rectifier system can cause DC bus-bar voltage with the fluctuation of AC-input voltage ripple
Dynamic, industrial frequency rectifying can not boost, it is necessary to and increase step-up transformer in inverter side and obtain stable three-phase alternating current as load supplying,
When generating voltage is higher, turning inversion duty cycle down makes output voltage stabilization, when generating voltage is relatively low, tunes up inversion duty cycle
It can make output voltage stabilization, the rectification and inversion of this mode must use Industrial Frequency Transformer, and generator must use electrical excitation
Synchronous motor, there is certain limitation using Industrial Frequency Transformer and electric excitation synchronous motor, and electric excitation synchronous motor and power frequency become
The big weight weight of depressor volume, causes whole system energy consumption big, of high cost；
2) all using high frequency electric source scheme, it is whole that three-phase PFC (PFC) boostings can be used in rectification for rectification and inversion
Stream or three-phase six switch+reactor PWM (pulse width modulation) rectification scheme, and the rectification of three-phase PFC boost can be with there are many form
It realizes, it is not described here in detail, in prime mover speed variation and generator voltage variation, it is ensured that DC bus-bar voltage is constant
(the big I of busbar voltage is set according to parameters such as inverter output voltage size, generator voltage size, bus capacitors), passes through
Dc bus inversion is stable AC sine wave voltage by three-phase inversion unit, is load supplying, this scheme generator also office
It is limited to electric excitation synchronous motor, system bulk will be caused bigger than normal, high expensive, for three-phase PFC boost rectification scheme, this scheme
Rectification and inversion are high frequency electric source schemes, and hardware is complicated, and volume is big, high expensive, and+reactor PWM is switched for three-phase six
Rectification scheme, input need additional increase reactor, cause the big weight weight of system bulk, of high cost, energy consumption is big.
Therefore, the prior art has much room for improvement and improves.
The content of the invention
The application provides a kind of electricity-generating method and system, and the alternating current voltage of output is stablized, and without Industrial Frequency Transformer, reduces
System cost.
According to the first aspect of the invention, the present invention provides a kind of electricity generation system, including：
First synchronous generator, for generating electricity；
First axle sends out rectification module, for the AC rectification that exports first synchronous generator into direct current, and
It is exported by dc bus to inverter module；When the generating voltage or generation frequency of first synchronous generator are reduced by institute
The power generation torque for stating the first synchronous generator tunes up, in generating voltage or the generation frequency rise of first synchronous generator
The power generation torque of first synchronous generator is turned down, to keep the stabilization of DC bus-bar voltage；
Inverter module, for being alternating current by the DC inverter.
The electricity generation system, wherein, it further includes and is connected between the first synchronous generator and first axle hair rectification module
The first exchange buffer module, the first exchange buffer module is to the alternating current that the first synchronous generator exports into row buffering.
The electricity generation system, wherein, the first axle hair rectification module is additionally operable to when loading increase, synchronous by first
The power generation torque of generator tunes up；When loading reduction, the power generation torque of the first synchronous generator is turned down, to keep direct current female
The stabilization of line voltage.
The electricity generation system, wherein, the first axle hair rectification module is additionally operable to the power generation in the first synchronous generator
When voltage or generation frequency reduce or load increases, increase the exciting current of the first synchronous generator；In the first synchronous generator
When the rise of generating voltage or generation frequency or load of machine reduce, reduce the exciting current of the first synchronous generator.
The electricity generation system, wherein, the electricity generation system further includes direct current buffer module, the direct current buffer module string
Connection is connected between first axle hair rectification module and inverter module.
The electricity generation system, wherein, further include the brake module being connected with dc bus；The brake module is described
It is straight to reduce by the electric energy on built-in resistance consumption dc bus when DC bus-bar voltage reaches default braking threshold
Busbar voltage is flowed, protects rectification and inverter module.
The electricity generation system, wherein, it further includes：
Second synchronous generator, for generating electricity；
Second axis sends out rectification module, for the AC rectification that exports second synchronous generator into direct current, and
It is exported by dc bus to the inverter module；When the generating voltage or generation frequency of second synchronous generator reduce
The power generation torque of second synchronous generator is tuned up, in the generating voltage of second synchronous generator or generation frequency liter
The power generation torque of second synchronous generator is turned down when high, to keep the stabilization of DC bus-bar voltage.
The electricity generation system, wherein, the first axle hair rectification module and the second axis hair rectification module use such as lower section
Formula keeps power-balance：
It at least one of is connected by analog quantity, high-speed pulse, communication signal and carries out power information exchange, to keep the
One axis sends out the power-balance between rectification module and the second axis hair rectification module；
It is put down alternatively, by droop control method first axle is made to send out power between rectification module and the second axis hair rectification module
Weighing apparatus.
The electricity generation system, wherein, first synchronous generator is synchronously sent out for magneto alternator or electrical excitation
Motor.
A kind of electricity-generating method, includes the following steps：
First synchronous generator generates electricity；
The AC rectification that first axle hair rectification module exports the first synchronous generator passes through direct current mother into direct current
Line is exported to inverter module；When the generating voltage or generation frequency of the first synchronous generator are reduced by the first synchronous generator
Power generation torque tunes up, in generating voltage or the generation frequency rise of the first synchronous generator by the power generation of the first synchronous generator
Torque is turned down, to keep the stabilization of DC bus-bar voltage；
The DC inverter is alternating current by inverter module.
Beneficial effects of the present invention：By the way that a first axle is set to send out rectification module, in the power generation of the first synchronous generator
Voltage or generation frequency tune up the power generation torque of the first synchronous generator when reducing, in the generating voltage of the first synchronous generator
Or turn the power generation torque of the first synchronous generator down during generation frequency rise, to keep the stabilization of DC bus-bar voltage.So as to
Stablize the alternating current voltage that electricity generation system exports, without Industrial Frequency Transformer, reduce system cost.
Description of the drawings
Fig. 1 is the structure diagram of existing Shaft-Generator；
Fig. 2 is the structure diagram of electricity generation system provided by the invention；
Fig. 3 is the schematic diagram that stator inductance is connected with axis hair rectification module in electricity generation system provided by the invention；
Fig. 4 is the structure diagram of one embodiment of electricity generation system provided by the invention；
Fig. 5 is the circuit diagram of one embodiment of electricity generation system provided by the invention；
Fig. 6 is the structure diagram of another embodiment of electricity generation system provided by the invention；
Fig. 7 is the circuit diagram of another embodiment of electricity generation system provided by the invention；
Fig. 8 is the structure diagram of electricity generation system other embodiment provided by the invention；
Fig. 9 is the flow chart of electricity-generating method provided by the invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the section Example of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, the every other implementation that those skilled in the art are obtained without creative efforts
Example, belongs to the scope of protection of the invention.
The present invention provides a kind of electricity generation system, as shown in Fig. 2, the system comprises the first synchronous generator 110, first axles
Send out rectification module 130, inverter module 40 and filter module 50.First synchronous generator 110 sends out rectification mould by first axle
Block 130 connects the input terminal of inverter module 40, and the output terminal of inverter module 40 connects external loading 60 by filter module 50.
First synchronous generator 110, for generating electricity under the drive of wheel.
Also referring to Fig. 3, the first axle sends out rectification module 130, for by the stator in the first synchronous generator 110
Inductance L is boosted as the alternating current that boost inductance exports the first synchronous generator 110 and is rectified into direct current, by straight
Stream busbar is exported to inverter module 40；After DC bus-bar voltage rises to the first preset value, in 110 speed of the first synchronous generator
When degree fluctuation causes 60 fluctuation of generating voltage variation, generation frequency variation or load, by adjusting the first synchronous generator 110
The size of power generation torque realizes the stabilization of DC bus-bar voltage, specifically, making DC bus-bar voltage by open loop or closed loop adjusting
It is basically stable at the first preset value.Wherein, generation frequency can also be characterized with generator speed, the proportional relation of the two.Tool
Body, the first axle hair rectification module 130 is reduced in the generating voltage of the first synchronous generator 110 or generation frequency (generates electricity
Machine rotating speed) reduce or load increase when, the power generation torque of the first synchronous generator 110 is tuned up；In the first synchronous generator
When generating voltage raises or generation frequency raises or load reduces, the power generation torque of the first synchronous generator 110 is turned down, with
Keep the stabilization of DC bus-bar voltage.Wherein, the big I of DC bus-bar voltage (the first preset value) is according to inverter output voltage
The parameters such as size, generator voltage size, dc-link capacitance are set.The power generation torque is that the working condition of motor is hair
Torque under electricity condition.
The inverter module 40 is alternating current for first axle to be sent out to the DC inverter after 130 rectification of rectification module.
The filter module 50, for being filtered to the alternating current after inversion, so that load 60 uses.
As it can be seen that by the way that first axle is set to send out rectification module 130, the steady of DC bus-bar voltage can be kept while rectification
It is fixed, so that the alternating current voltage of electricity generation system output is stablized, it is simple in structure without Industrial Frequency Transformer, reduce system cost.
Electricity generation system provided by the invention can also be used in double Shaft-Generators, need to only add synchronous with first
The second identical synchronous generator of generator 110, the second axis corresponding with the second synchronous generator hair rectification module.And
Electrical excitation synchronous generator not only can be used in the synchronous generator of the present invention, moreover it is possible to using magneto alternator, individually below
It is described in detail with one embodiment.
Embodiment one：
As shown in Figure 4 and Figure 5, the electricity generation system in the present embodiment is a kind of double Shaft-Generators, including：First is synchronous
Generator 110, first exchanges buffer module 120, first axle hair rectification module 130, the exchange of the second synchronous generator 210, second
Buffer module 220, the second axis hair rectification module 230, brake module 30, inverter module 40 and filter module 50.Described first is same
The input terminal that generator 110 connects first axle hair rectification module 130 by the first exchange buffer module 120 is walked, first axle is sent out whole
The output terminal of flow module 130 connects the input terminal of inverter module 40 by dc bus；Second synchronous generator 210 passes through
Second exchange buffer module 220 connects the input terminal of the second axis hair rectification module 230, and the second axis sends out the output of rectification module 230
End connects the input terminal of inverter module 40 by dc bus；The output terminal of inverter module 40 connects outside by filter module 50
Load 60.
First synchronous generator 110 is magneto alternator, is connected by the wheel of belt transmission and axle one side
It connects.Vehicle wheel rotation is driven during vehicle traveling, wheel drives the first synchronous generator 110 to rotate by belt；So that first
Synchronous generator 110 generates electricity, and exports AC sine wave voltage.
The first exchange buffer module 120, for the alternating current that the first synchronous generator 110 exports into row buffering,
To protect each electronic component in subsequent conditioning circuit.Specifically, as shown in figure 5, the first exchange buffer module 120 includes the
One switch K1, second switch K2, the 3rd switch K3, first resistor R1, second resistance R2 and 3rd resistor R3.The first switch
One end of K1 connects the r1 ends of the first synchronous generator 110 and one end of first resistor R1, the other end of the first switch K1
Connect the other end of first resistor R1 and the first input end of first axle hair rectification module 130.One end of the second switch K2
Connect the s1 ends of the first synchronous generator 110 and one end of second resistance R2, the other end connection second of the second switch K2
Second input terminal of the other end and first axle the hair rectification module 130 of resistance R2.One end connection first of the 3rd switch K3
The t1 ends of synchronous generator 110 and one end of 3rd resistor R3, the other end connection 3rd resistor R3's of the 3rd switch K3
3rd input terminal of the other end and first axle hair rectification module 130.The r1 ends, s1 ends and t1 ends are the first synchronous generator
110 three-phase electricity output terminal.First switch K1, second switch K2 and the 3rd switch K3 linkages, i.e., three simultaneously turns on or turns off.
The first axle sends out rectification module 130, whole for the output alternating current voltage of the first synchronous generator 110 to be boosted
It flows for stable DC bus-bar voltage, when wheel velocity variation causes generator voltage to change, it is ensured that DC bus-bar voltage
It is constant.The first axle hair rectification module 130 includes the first transistor Q1, second transistor Q2, third transistor Q3, the 4th crystalline substance
Body pipe Q4, the 5th transistor Q5, the 6th transistor Q6 (Q1-Q6) and for the first controller of Q1-Q6 to be controlled (not show in figure
Go out).The first transistor Q1, second transistor Q2, third transistor Q3, the 4th transistor Q4, the 5th transistor Q5 and
The control pole of six transistor Q6 is all connected with the output terminal of the first controller.The extremely first axle of the first of the first transistor Q1 is sent out
The first input end of rectification module 130, the other end of connection first switch K1 and the second pole of the 4th transistor Q4；Described first
First output terminal of the extremely first axle hair rectification module 130 of the second of transistor Q1, the second pole of connection second transistor Q2, the
The second pole of three transistor Q3 and dc bus.The extremely first axle hair rectification module 130 of the first of the second transistor Q2
Second input terminal, the other end of connection second switch K2 and the second pole of the 5th transistor Q5.The of the third transistor Q3
3rd input terminal of one extremely first axle hair rectification module 130, the other end and the 6th transistor Q6 of the 3rd switch K3 of connection
Second pole.The second output terminal of the extremely first axle hair rectification module 130 of the first of the 4th transistor Q4, connects the 5th crystal
The first pole of pipe Q5, the 6th the first poles of transistor Q6 and dc bus.Wherein, in the present embodiment, the first transistor Q1,
Two-transistor Q2, third transistor Q3, the 4th transistor Q4, the 5th transistor Q5 and the 6th transistor Q6 are using IGBT (insulation
Grid bipolar transistor), it is of course also possible to use metal-oxide-semiconductor.When Q1-Q6 uses IGBT, control extremely base stage, first extremely sends out
Emitter-base bandgap grading, the second extremely collector.When Q1-Q6 uses metal-oxide-semiconductor, control extremely grid, the first extremely source electrode, second extremely drains.
The first axle hair rectification module 130 need not additionally increase boost inductance, but pass through the first controller and six
A IGBT pipes Q1-Q6 is by the stator inductance L in the first synchronous generator 110 as boost inductance to the first synchronous generator 110
The alternating current of output is boosted and is rectified into direct current, is exported by dc bus to inverter module 40.Specifically, the first control
Device processed causes generating voltage after DC bus-bar voltage rises to the first preset value, in 110 velocity perturbation of the first synchronous generator
It is real by adjusting the size of power generation torque of the first synchronous generator 110 during 60 fluctuation of variation, generation frequency variation or load
Existing DC bus-bar voltage closed loop.Specifically, first controller the first synchronous generator 110 generating voltage reduce or
When generation frequency reduces or load increases, the power generation torque of the first synchronous generator 110 is tuned up；In the first synchronous generator
When 110 generating voltage rise or generation frequency rise or load reduce, by the power generation torque tune of the first synchronous generator 110
It is small, to keep the stabilization of DC bus-bar voltage.
Likewise, second synchronous generator 210 is magneto alternator, pass through belt transmission and axle opposite side
Wheel connection.Vehicle wheel rotation is driven during vehicle traveling, wheel drives the second synchronous generator 210 to rotate by belt；From
And the second synchronous generator 210 is made to generate electricity, export AC sine wave voltage.
The second exchange buffer module 220, for the alternating current that the second synchronous generator 210 exports into row buffering,
To protect each electronic component in subsequent conditioning circuit.Specifically, it is described second exchange buffer module 220 include the 4th switch K4,
5th switch K5, the 6th switch K6, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6.One end of the 4th switch K4
Connect the r2 ends of the second synchronous generator 210 and one end of the 4th resistance R4, the other end connection the 4th of the 4th switch K4
The first input end of the other end of resistance R4 and the second axis hair rectification module 230.One end connection second of the 5th switch K5
The s2 ends of synchronous generator 210 and one end of the 5th resistance R5, the other end of the 5th switch K5 connect the 5th resistance R5's
Second input terminal of the other end and the second axis hair rectification module 230.One end of the 6th switch K6 connects the second synchronous generator
The t2 ends of machine 210 and one end of the 6th resistance R6, it is described 6th switch K6 the other end connect the 6th resistance R6 the other end and
Second axis sends out the 3rd input terminal of rectification module 230.The r2 ends, s2 ends and t2 ends are the three-phase of the second synchronous generator 210
Electricity output end.4th switch K4, the 5th switch K5 and the 6th switch K6 linkages, i.e., three simultaneously turns on or turns off.
Second axis sends out rectification module 230, and the alternating current voltage for the second synchronous generator 210 to be exported boosts whole
It flows for stable DC bus-bar voltage, when wheel velocity variation causes generator voltage to change, it is ensured that DC bus-bar voltage
It is constant.The second axis hair rectification module 230 includes the 7th transistor Q7, the 8th transistor Q8, the 9th transistor Q9, the tenth crystalline substance
Body pipe Q10, the 11st transistor Q11, the tenth two-transistor Q12 (Q7-Q12) and the second controller for controlling Q7-Q12.
The 7th transistor Q7, the 8th transistor Q8, the 9th transistor Q9, the tenth transistor Q10, the 11st transistor Q11 and
The control pole of ten two-transistor Q12 is all connected with the output terminal of second controller.The first extremely second of the 7th transistor Q7
Axis sends out the first input end of rectification module 230, the other end of the 4th switch K4 of connection and the second pole of the tenth transistor Q10；Institute
State the first output terminal of second extremely the second axis hair rectification module 230 of the 7th transistor Q7, the of the 8th transistor Q8 of connection
Two poles, the second pole of the 9th transistor Q9, the first output terminal and dc bus of first axle hair rectification module 130.Described 8th
Extremely the second axis of the first of transistor Q8 sends out the second input terminal of rectification module 230, the other end and the of the 5th switch K5 of connection
The second pole of 11 transistor Q11.3rd input of first extremely the second axis hair rectification module 230 of the 9th transistor Q9
End, the other end of the 6th switch K6 of connection and the second pole of the tenth two-transistor Q12.The first pole of the tenth transistor Q10
The second output terminal of rectification module 230 is sent out for the second axis, connects the first pole, the tenth two-transistor Q12 of the 11st transistor Q11
First pole, the second output terminal and dc bus of first axle hair rectification module 130.Wherein, in the present embodiment, the 7th crystal
Pipe Q7, the 8th transistor Q8, the 9th transistor Q9, the tenth transistor Q10, the 11st transistor Q11 and the tenth two-transistor Q12
Using IGBT (insulated gate bipolar transistor), it is of course also possible to use metal-oxide-semiconductor.When Q7-Q12 uses IGBT, control extremely base
Pole, the first extremely emitter, the second extremely collector.When Q7-Q12 uses metal-oxide-semiconductor, control extremely grid, the first extremely source electrode,
Second extremely drains.
The second axis hair rectification module 230 need not additionally increase boost inductance, but pass through second controller and six
A IGBT pipes Q7-Q12 is by the stator inductance in the second synchronous generator 210 as boost inductance to the second synchronous generator 210
The alternating current of output is boosted and is rectified into direct current, is exported by dc bus to inverter module 40.Since the second axis is sent out
Rectification module 230 is identical with first axle hair 130 26S Proteasome Structure and Function of rectification module, simply corresponds to respective synchronous generator respectively,
Therefore the connection relation of the stator inductance in the second axis hair 230 and second synchronous generator 210 of rectification module can refer to Fig. 3.
For two controllers after DC bus-bar voltage rises to the first preset value, 210 velocity perturbation of the second synchronous generator causes power generation electricity
It is real by adjusting the size of power generation torque of the second synchronous generator 210 during 60 fluctuation of buckling, generation frequency variation or load
Existing DC bus-bar voltage closed loop.Specifically, the second controller the second synchronous generator 210 generating voltage reduce or
When generation frequency reduces or load increases, the power generation torque of the second synchronous generator 210 is tuned up；In the second synchronous generator
When 210 generating voltage rise or generation frequency rise or load reduce, by the power generation torque tune of the second synchronous generator 210
It is small, to keep the stabilization of DC bus-bar voltage.
Wherein, 130 and second axis of first axle hair rectification module sends out the DC bus-bar voltage after 230 rectification of rectification module simultaneously
Connection.
The brake module 30, for when the DC bus-bar voltage reaches default braking threshold, by built-in
Electric energy on resistance R8 consumption dc bus, to reduce DC bus-bar voltage, protection axis hair rectification module and inverter module.It is described
Brake module 30 includes brake monitor, the first diode D1, brake transistor Q19 and energy consumption resistor R8.Brake monitor
The control pole of output terminal connection brake transistor Q19, the of the cathode connection first axle hair rectification module 130 of the first diode D1
One end of one output terminal, the first output terminal of the second axis hair rectification module 230 and energy consumption resistor R8；The anode of first diode D1
Connect the other end of energy consumption resistor R8 and the second pole of brake transistor Q19；The first pole connection the of the brake transistor Q19
The second output terminal of one axis hair rectification module 130 and the second output terminal of the second axis hair rectification module 230.Brake monitor is in institute
When stating DC bus-bar voltage and reaching default braking threshold, the first pole and the second pole of conducting brake transistor Q19 so that energy consumption
Electric energy on resistance R8 consumption dc bus, so as to reduce DC bus-bar voltage.Brake transistor Q19 is used in the present embodiment
IGBT is managed, control extremely base stage, the first extremely emitter, the second extremely collector；Certainly braking in other embodiments
Transistor Q19 can also use metal-oxide-semiconductor, and control extremely grid, first extremely source electrode, the second level extremely drains.
Double Shaft-Generators of the present embodiment further include one or more dc-link capacitances, one or more of straight
Flowing bus capacitor can series, parallel or connection in series-parallel.The present embodiment is with the first dc-link capacitance C1 and the second dc bus electricity
Exemplified by holding C2, the first dc-link capacitance C1 and the second dc-link capacitance C2 are connected in series.First axle hair rectification module 130
First output terminal connects the second output terminal of first axle hair rectification module 130 by two dc-link capacitances C1, C2.
The inverter module 40 is alternating current for first axle to be sent out to the DC inverter after 130 rectification of rectification module.Tool
Body, the inverter module 40 includes the 13rd transistor Q13, the 14th transistor Q14, the 15th transistor Q15, the 16th
Transistor Q16, the 17th transistor Q17, the 18th transistor Q18 and the inversion of the control pole of output terminal and Q13-Q18 connection
Controller.The second pole of the 13rd transistor Q13, the second pole of the 14th transistor Q14 and the 15th transistor Q15
Second pole is all connected with the first output terminal of first axle hair rectification module 130.The first pole of the 16th transistor Q16, the tenth
The first pole of seven transistor Q17 and the first pole of the 18th transistor Q18 are all connected with the second defeated of first axle hair rectification module 130
Outlet.First ac output end of the extremely inverter module 40 of the first of the 13rd transistor Q13 connects the 16th transistor
The second pole of Q16 and filter module 50.Second exchange output of the extremely inverter module 40 of the first of the 14th transistor Q14
End connects the second pole of the 17th transistor Q17 and filter module 50.The first extremely inversion of the 15th transistor Q15
3rd ac output end of module 40 connects the second pole of the 18th transistor Q18 and filter module 50.The inverter controller
Inversion function is realized by controlling the break-make of Q13-Q18.
Wherein, in the present embodiment, the 13rd transistor Q13, the 14th transistor Q14, the 15th transistor Q15,
16th transistor Q16, the 17th transistor Q17 and the 18th transistor Q18 use IGBT (insulated gate bipolar transistor),
It is of course also possible to use metal-oxide-semiconductor.When Q13-Q18 uses IGBT, control extremely base stage, the first extremely emitter, second extremely collects
Electrode.When Q13-Q18 uses metal-oxide-semiconductor, control extremely grid, the first extremely source electrode, second extremely drains.
The filter module 50, for being filtered (sine filtering) to the alternating current after inversion, so that load 60 uses.
The system when in use, starts two synchronous generators and sends alternating voltage, pass through two pole of body of R1, R2, R3, Q1
Pipe, the body diode of Q2, the body diode of Q3, the body diode of Q4, the body diode of Q5, the body diode of Q6 and R4, R5,
The body diode of R6, Q7, the body diode of Q8, the body diode of Q9, the body diode of Q10, the body diode of Q11, the body of Q12
Diode charges for dc-link capacitance (C1 and C2), and when DC bus-bar voltage reaches the first preset value, K1-K6 is closed,
Hereafter, it can run Q1~Q12 by the first controller and second controller and adjust its duty cycle and send out two synchronous generators
It is constant DC bus-bar voltage that the alternating voltage gone out, which carries out boosting rectification, can pass through simulation between two axis hair rectification modules
The connection of the signals such as amount, high-speed pulse, communication carries out power information exchange so that power-balance between two axis hair rectification modules；
Also it can be connected without signal, pass through power-balance between two axis hair rectification modules of droop control method.When synchronous hair
Motor speed is higher than rated speed, and (corresponding synchronous motor enters weak magnetic field operation shape to corresponding axis hair rectification module weak magnetic field operation
State), when synchronous generator speed is excessively high so that busbar voltage is higher, inside height to brake module 30 during default braking threshold
Q19 is turned on, and carries out energy expenditure to DC bus-bar voltage by R8, DC bus-bar voltage continues to rise to over-voltage protection point, then
6 IGBT inside closing axle hair rectification module are managed and are exchanged buffer module, and the voltage of generator 130 passes through R1, R2, R3 at this time
It is divided with R8；The voltage of generator 230 is divided by R4, R5, R6 and R8, can avoid damage axis hair rectification module
The devices such as IGBT pipes and dc-link capacitance.
As it can be seen that double Shaft-Generators provided in this embodiment, need not additionally increase boost inductance, it will be in generator
Stator inductance boosts as boost inductance.When alternator speed fluctuation cause generating voltage variation, generation frequency variation or
During the fluctuation of load, axis sends out rectification module and realizes busbar voltage closed loop by adjusting the size of power generation torque.It is sent out using permanent-magnet synchronous
Motor can reduce system bulk weight and cost, so as to reduce system energy consumption.The extremely caused alternator speed of wheel is excessively high,
When situations such as generation frequency is excessively high, generating voltage is excessively high, busbar voltage is excessively high occurs, braking can be passed through for permanent magnet synchronous motor
Module avoids axis hair rectifying device damage with action of giving is exchanged.Industrial Frequency Transformer need not additionally be increased, so that it may which output is steady
Fixed sine wave alternating current can save system cost, reduce volume weight, save energy consumption.
Embodiment two：
As shown in Figure 6 and Figure 7, the electricity generation system in the present embodiment is a kind of double Shaft-Generators, including：First is synchronous
Generator 110, first axle hair rectification module 130, the second synchronous generator 210, the second axis hair rectification module 230, direct current buffering
Module, dc-link capacitance, inverter module 40 and filter module 50.First synchronous generator 110 is sent out whole by first axle
Flow module 130 connects the input terminal of inverter module 40, and second synchronous generator 210 sends out rectification module 230 by the second axis
The input terminal of inverter module 40 is connected, the output terminal of inverter module 40 connects external loading 60 by filter module 50.
First synchronous generator 110 is electrical excitation synchronous generator, comes with the first field regulator.Described first
Synchronous generator 110 is connected by belt transmission with the wheel of axle one side.Vehicle wheel rotation is driven during vehicle traveling, wheel leads to
Crossing belt drives the first synchronous generator 110 to rotate；So that the first synchronous generator 110 generates electricity, output AC sine wave electricity
Pressure.
The first axle sends out rectification module 130, and the alternating current voltage for the first synchronous generator 110 to be exported boosts whole
It flows for stable DC bus-bar voltage, when wheel velocity variation causes generator voltage to change, it is ensured that DC bus-bar voltage
It is constant.The circuit structure of first axle hair rectification module 130 in the present embodiment is identical with embodiment one, as shown in fig. 7, no longer superfluous
It states.
The first axle hair rectification module 130 need not additionally increase boost inductance, but pass through the first controller and six
A IGBT pipes Q1-Q6 is defeated to the first synchronous generator 110 as boost inductance by the stator inductance in the first synchronous generator 110
The alternating current gone out is boosted and is rectified into direct current, is exported by dc bus to inverter module 40.In the present embodiment
One axis sends out the function of the adjusting exciting current size than embodiment more than one of rectification module 130.Specifically, the first controller exists
After DC bus-bar voltage rises to the first preset value, cause generating voltage variation, hair in 110 velocity perturbation of the first synchronous generator
When electric frequency variation or 60 fluctuation of load, exciting current size is on the one hand adjusted by the first field regulator to reduce fluctuation model
It encloses；On the other hand DC bus-bar voltage closed loop is realized by the size for the power generation torque for adjusting the first synchronous generator 110.Specifically
, first controller is reduced in the generating voltage of the first synchronous generator 110 or generation frequency reduces or load increase
When, increase the exciting current of the first synchronous generator 110 by the first field regulator, and by the first synchronous generator 110
Power generation torque tunes up；When the generating voltage rise or generation frequency rise or load of the first synchronous generator 110 reduce, lead to
The exciting current that the first field regulator reduces the first synchronous generator 110 is crossed, and the power generation of the first synchronous generator 110 is turned
Square is turned down, to keep the stabilization of DC bus-bar voltage.
Likewise, second synchronous generator 210 is electrical excitation synchronous generator, the second field regulator is come with.
Second synchronous generator 210 is connected by belt transmission with the wheel of axle opposite side.Vehicle wheel rotation is driven during vehicle traveling,
Wheel drives the second synchronous generator 210 to rotate by belt；So that the second synchronous generator 210 generates electricity, output exchange is just
String wave voltage.
Second axis sends out rectification module 230, and the alternating current voltage for the second synchronous generator 210 to be exported boosts whole
It flows for stable DC bus-bar voltage, when wheel velocity variation causes generator voltage to change, it is ensured that DC bus-bar voltage
It is constant.The circuit structure of the second axis hair rectification module 230 in the present embodiment is identical with embodiment one, as shown in fig. 7, no longer superfluous
It states.
The second axis hair rectification module 230 need not additionally increase boost inductance, but pass through second controller and six
A IGBT pipes Q7-Q12 is by the stator inductance in the second synchronous generator 210 as boost inductance to the second synchronous generator 210
The alternating current of output is boosted and is rectified into direct current, is exported by dc bus to inverter module 40.In the present embodiment
Second axis sends out the function of the adjusting exciting current size than embodiment more than one of rectification module 230.Specifically, second controller
After DC bus-bar voltage rises to the first preset value, 210 velocity perturbation of the second synchronous generator cause generating voltage variation,
When generation frequency changes or load 60 is fluctuated, exciting current size is on the one hand adjusted by the second field regulator to reduce fluctuation
Scope；On the other hand DC bus-bar voltage closed loop is realized by the size for the power generation torque for adjusting the second synchronous generator 210.Tool
Body, the second controller is reduced in the generating voltage of the second synchronous generator 210 or generation frequency reduces or load increases
When big, increase the exciting current of the second synchronous generator 210 by the second field regulator, and by the second synchronous generator 210
Power generation torque tune up；When the generating voltage rise or generation frequency rise or load of the second synchronous generator 210 reduce,
Reduce the exciting current of the second synchronous generator 210 by the second field regulator, and by the power generation of the second synchronous generator 210
Torque is turned down, to keep the stabilization of DC bus-bar voltage.
Wherein, 130 and second axis of first axle hair rectification module sends out the DC bus-bar voltage after 230 rectification of rectification module simultaneously
Connection.
The direct current buffer module including the switch K7 of the 7th resistance R7 and the 7th, buffers for direct current.The direct current buffering
Module and dc-link capacitance are connected in series in the first output terminal of first axle hair rectification module 130 and first axle hair rectification module
130 second output terminal.
The dc-link capacitance can set one or more, and multiple dc-link capacitances can series, parallel or connection in series-parallel
Capacitance.The present embodiment is by taking the first dc-link capacitance C1 and the second dc-link capacitance C2 as an example, the first dc-link capacitance
C1 and the second dc-link capacitance C2 are connected in series.
The circuit and function of the inverter module 40 are as in the first embodiment, details are not described herein.
The filter module 50, for being filtered to the alternating current after inversion, so that load 60 uses.
The system when in use, drives vehicle wheel rotation, wheel is synchronous with electrical excitation by belt transmission during vehicle traveling
Generator connects, and during vehicle wheel rotation the synchronous generator is driven to rotate therewith, while makes synchronous generator output exchange
Sine voltage, generator voltage can be boosted rectification as stable DC bus-bar voltage by two axis hair rectification modules, in wheel
When velocity variations and generator voltage variation, it is ensured that dc bus is constant, and the present embodiment axis hair rectification module need not
It is additional to increase boost inductance, the stator inductance in generator is boosted as boost inductance.When alternator speed fluctuation is drawn
When playing generating voltage variation, generation frequency variation or the fluctuation of load, axis hair rectification module is on the one hand big by adjusting exciting current
Small to reduce fluctuation range, alternator speed is low, and load weight, then exciting current is big, and alternator speed is high, and load is light, then excitation
Electric current is small；On the other hand realize that busbar voltage closed loop makes busbar voltage constant by adjusting the size of power generation torque, generator speed
Degree is lower, then generation frequency or generating voltage are lower, it is necessary to power generation torque is tuned up, on the contrary then turn down；Load increase will be, it is necessary to will
Power generation torque tunes up, on the contrary then turn down.It can pass through the signals such as analog quantity, high-speed pulse, communication between two axis hair rectification modules
Connection carries out power information exchange so that power-balance between two axis hair rectification modules can also be connected without signal, passed through
Droop control method causes power-balance between two axis hair rectification modules.When alternator speed is higher than rated speed, axis is sent out whole
Flow module weak magnetic field operation, when alternator speed is excessively high so that busbar voltage is higher, height to default over-voltage protection point then goes out
Magnetic also shuts off entire axis hair rectification module, inverter module, can avoid the switching tube and dc bus of damage axis hair rectification module
The devices such as capacitance.
The present embodiment is suitable for magneto alternator, so as to reduce system bulk weight and cost, so as to reduce system
Energy consumption.Three-phase axis hair rectification module need not additionally increase boost inductance, and the stator inductance in generator is regarded boost inductance
It boosts.When alternator speed fluctuation causes generating voltage variation, generation frequency variation or the fluctuation of load, axis hair rectification mould
Block realizes busbar voltage closed loop by adjusting the size of power generation torque.The extremely caused alternator speed of wheel is excessively high, power generation electricity
When pressing through situations such as high, busbar voltage is excessively high and occurring, field suppression protection can be carried out for electro-magnetic motor axis to be avoided to send out rectifier
Part damages.Industrial Frequency Transformer need not additionally be increased, so that it may export stable sine wave alternating current, system cost can be saved, subtracted
Small size weight saves energy consumption.
Certainly, the present invention can also carry out Function Extension on the basis of embodiment one, two, as shown in figure 8, axis sends out rectification
Module is not limited to opened loop control, it is also possible to which closed-loop control is gathered for example with the first encoder 111 and second encoder 211
Generator speed makes the relatively reliable stabilization of system.Generator use electric excitation generator when, can also be directed to field regulator into
Row status monitoring and start-stop reset control, and coordination control is carried out for exciting current and power generation torque so as to significantly more efficient, with
Just control performance is promoted.Inverter module 40 exports not only voltage available open loop control mode, in order to promote inverter voltage controlling
Can, also voltage available close-loop control mode can be sent out with batteries in parallel connection module 70, during vehicle normally travel by axis on dc bus
Rectification module is powered for inverter module 40, while is charged for battery modules 70, is inverse by battery modules 70 when vehicle low speed or parking
Become module 40 to power, electricity consumption is aided on band motor-car, realize that electricity consumption is uninterrupted.
In conclusion electricity generation system provided by the invention, adaptable, electrical excitation synchronous generator is not only adapted to, simultaneously
Magneto alternator is also applied for, so as to reduce system bulk weight and cost, so as to reduce system energy consumption.It can solve train
The driven compressor problem of upper electrical problem, especially van cooler.Certainly, this electricity generation system can also be applied to automobile shafts band hair
The twin shafts such as electricity, steamer shaft generator, military project shaft generator band power generation application.
Based on above-described embodiment provide electricity generation system, the present invention also provides a kind of electricity-generating method, as shown in figure 9, including
Following steps：
S10, the first synchronous generator 110 and the second synchronous generator 210 generate electricity.
S20, first axle hair rectification module 130 AC rectification that exports the first synchronous generator 110 into direct current, and
It is exported by dc bus to inverter module 40；It will when the generating voltage or generation frequency of the first synchronous generator 110 reduce
The power generation torque of first synchronous generator 110 tunes up, in generating voltage or the generation frequency rise of the first synchronous generator 110
The power generation torque of first synchronous generator 110 is turned down, to keep the stabilization of DC bus-bar voltage.Second axis sends out rectification module
230 AC rectifications for exporting the second synchronous generator 210 pass through dc bus and export to inverter module into direct current
40；When the generating voltage or generation frequency of the second synchronous generator 210 are reduced by the power generation torque of the second synchronous generator 210
It tunes up, turns the power generation of the second synchronous generator 210 in generating voltage or the generation frequency rise of the second synchronous generator 210
Square is turned down, to keep the stabilization of DC bus-bar voltage.
The DC inverter is alternating current by S30, inverter module 40, which supplies after being filtered by filter module 50
It is used to load 60.
Since the detailed process and feature of this electricity-generating method have elaborated in the embodiment of electricity generation system, do not do herein
It repeats.
Use above specific case is illustrated the present invention, is only intended to help to understand the present invention, not limiting
The system present invention.For those skilled in the art, thought according to the invention can also be made several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of electricity generation system, which is characterized in that including：
First synchronous generator, for generating electricity；
First axle sends out rectification module, for the AC rectification that exports first synchronous generator into direct current, and passes through
Dc bus is exported to inverter module；When the generating voltage or generation frequency of first synchronous generator are reduced by described the
The power generation torque of one synchronous generator tunes up, in generating voltage or the generation frequency rise of first synchronous generator by institute
The power generation torque for stating the first synchronous generator is turned down, to keep the stabilization of DC bus-bar voltage；
Inverter module, for being alternating current by the DC inverter.
2. electricity generation system as described in claim 1, which is characterized in that further include and be connected on the first synchronous generator and first axle
Send out the first exchange buffer module between rectification module, the friendship that the first exchange buffer module exports the first synchronous generator
Galvanic electricity is into row buffering.
3. electricity generation system as described in claim 1, which is characterized in that the first axle hair rectification module is additionally operable to increase in load
When big, the power generation torque of the first synchronous generator is tuned up；When loading reduction, by the power generation torque tune of the first synchronous generator
It is small, to keep the stabilization of DC bus-bar voltage.
4. electricity generation system as described in claim 1, which is characterized in that first synchronous generator is electrical excitation synchronous generator
Machine；First axle hair rectification module is additionally operable to reduce in the generating voltage or generation frequency of the first synchronous generator or load increases
When big, increase the exciting current of the first synchronous generator；The first synchronous generator generating voltage or generation frequency rise or
When person loads reduction, reduce the exciting current of the first synchronous generator.
5. electricity generation system as claimed in claim 4, which is characterized in that the electricity generation system further includes direct current buffer module, institute
Direct current buffer module is stated to be connected in series between first axle hair rectification module and inverter module.
6. electricity generation system as claimed in claim 3, which is characterized in that further include the brake module being connected with dc bus；Institute
Brake module is stated when the DC bus-bar voltage reaches default braking threshold, by built-in resistance consumption dc bus
Electric energy, to reduce DC bus-bar voltage.
7. electricity generation system as described in claim 1, which is characterized in that further include：
Second synchronous generator, for generating electricity；
Second axis sends out rectification module, for the AC rectification that exports second synchronous generator into direct current, and passes through
Dc bus is exported to the inverter module；When the generating voltage or generation frequency of second synchronous generator are reduced by institute
The power generation torque for stating the second synchronous generator tunes up, in generating voltage or the generation frequency rise of second synchronous generator
The power generation torque of second synchronous generator is turned down, to keep the stabilization of DC bus-bar voltage.
8. electricity generation system as claimed in claim 7, which is characterized in that the first axle hair rectification module and the hair rectification of the second axis
Module keeps power-balance in the following way：
Power information exchange is carried out by least one of analog quantity, high-speed pulse, communication signal connection, to keep first axle
Send out the power-balance between rectification module and the second axis hair rectification module；
Alternatively, by droop control method first axle is made to send out power-balance between rectification module and the second axis hair rectification module.
9. electricity generation system as described in claim 1, which is characterized in that first synchronous generator is magneto alternator
Or electrical excitation synchronous generator.
10. a kind of electricity-generating method, which is characterized in that include the following steps：
First synchronous generator generates electricity；
The AC rectification that first axle hair rectification module exports the first synchronous generator is into direct current, and it is defeated to pass through dc bus
Go out to inverter module；When the generating voltage or generation frequency of the first synchronous generator are reduced by the power generation of the first synchronous generator
Torque tunes up, in generating voltage or the generation frequency rise of the first synchronous generator by the power generation torque of the first synchronous generator
It turns down, to keep the stabilization of DC bus-bar voltage；
The DC inverter is alternating current by inverter module.
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