CN108507804A - Direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification - Google Patents
Direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification Download PDFInfo
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- CN108507804A CN108507804A CN201710104554.XA CN201710104554A CN108507804A CN 108507804 A CN108507804 A CN 108507804A CN 201710104554 A CN201710104554 A CN 201710104554A CN 108507804 A CN108507804 A CN 108507804A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
Abstract
The present invention relates to a kind of direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification, it includes high-tension switch cabinet（G1）, transformer（TM1）, multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）, intermediate common DC bus more inverters（INV1‑INV8）, more accompany examination motor（M1‑M8）, intermediate dc bus discharge loop, the power distribution of locomotive bed is via high-tension switch cabinet (G1), transformer（TM1）The power supply for supplying active power filtering four-quadrant rectifier relevant voltage grade, in multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）Rear end, more inverters of intermediate common DC bus（INV1‑INV8）It is connected in parallel on common DC bus, every inverter respectively drives one and accompanies examination motor.Technical scheme of the present invention solves the locomotive bed electric drive system of the prior art, realizes cost of investment, the operation cost for reducing locomotive bed, and reach energy conservation and environmental protection purpose.
Description
Technical field
The present invention relates to a kind of electric control system more particularly to rectifier intelligent grid connection control technology, stacked rectifiers
Technology, intermediate dc common bus multiple-variable flow device energy circulation technology, should the direct current common bus locomotive based on multiple four-quadrant rectification
Testing stand electric drive system belongs to locomotive bed design and manufacturing technology field.
Background technology
In recent years, railway transportation high speed development, safety of railway traffic are related to national economy, therefore, to the various portions of locomotive
The performance requirement of part is all very high, and locomotive must carry out various performance tests before manufacture, and locomotive bed is can to simulate
Endless track provides mileage service condition for locomotive, to be verified to the traction braking characteristic of locomotive, and to locomotive
Various performances carry out more comprehensive examination.Locomotive bed completes operation and control by electric drive system, load applies
And the functions such as secondary ventilation cooling, therefore, how the core of electric drive system locomotive bed designs Electrified Transmission system
System determines experimental performance, reliability and the economic benefit of locomotive bed.
Locomotive bed is multi-axis control system, and existing locomotive bed configures a whole set of independent electric traction system per axis
System, often covering electric traction system includes：High-tension switch cabinet, tractive transformer cabinet, rectifier, inverter cabinet and load motor etc.,
Cause existing locomotive bed cost of investment and operation cost high.Typical locomotive electric cad system transmission system is shown in Fig. 1, Fig. 2 of attached drawing,
Fig. 1 is the electric drive system for the locomotive bed that Zhuzhou Electric Locomotive Co. Ltd., will build up, which electrically passes
Dynamic system power supply condition is three-phase 10kV；Fig. 2 is that Dalian Locomotive Inst. and Dalian Electric Traction R ＆ D Center's R ＆ D Cooperation are used
In the electric drive system of Tianjin electric locomotive Co., Ltd locomotive bed, the Six-axes locomotive electric drive system condition of power supply
For single-phase 25kV.
Invention content
The purpose of the present invention is to provide a kind of direct current common bus locomotive bed based on multiple four-quadrant rectification is electrical
Transmission system, to solve the locomotive bed electric drive system of the prior art, realizing reduces locomotive examination
Cost of investment, the operation cost of platform are tested, and reaches energy conservation and environmental protection purpose.
To achieve the goals above, the present invention adopts the following technical scheme that.
A kind of direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification, it is pressed off including height
Close cabinet G1, transformer TM1, multiplex active power filtering four-quadrant commutation system AFE1, AFE2, more of intermediate common DC bus it is inverse
Become device INV1-INV8, more accompany examination motor M1-M8, intermediate dc bus discharge loop；High-tension switch cabinet G1 connection transformers
TM1, transformer TM1 connection multiplex active power filtering four-quadrant commutation systems AFE1, AFE2；The power distribution of locomotive bed passes through
By the active power filtering four of high-tension switch cabinet G1, transformer TM1 supply multiplex active power filtering four-quadrant commutation systems AFE1, AFE2
The power supply of quadrant rectifier relevant voltage grade, in the rear end of multiplex active power filtering four-quadrant commutation system AFE1, AFE2, in
Between more inverter INV1-INV8 of common DC bus be connected in parallel on common DC bus, every inverter respectively drives one
Accompany examination motor.
Preferably, one end of the high-tension switch cabinet G1 connects 2200kVA/10kV power distributions, the high-voltage switch gear
The other end connection transformer TM1 of cabinet G1；The high-tension switch cabinet G1 is used in high pressure three-phase power supply system, provides high-voltage electrical apparatus
The plant-grid connection of equipment, splitting or integrating normally and malfunction under electric current, to power grid carry out protection and staged isolation, show voltage,
Current value has the switch and combined electrical apparatus cabinet of the o-volt protection of control power supply and the set-up function of Protection parameters, in agreement
Under power supply system, by different cabinet type carrying rated operational currents, closes, cut-offs fault current.
In any of the above-described technical solution preferably, the wiring group of the transformer TM1 uses D/y11 modes.
In any of the above-described technical solution preferably, the primary side of the transformer TM1 is equipped with 5 grades of taps, respectively+
10% ,+5%, 0%, -5%, -10%, tap-change is carried out using No-load changer mode, it can be micro- to five grades of the voltage of primary side progress
Adjust, the transformer TM1 for realizing voltage transformation and isolation, it is complete by the high pressure conversion of net side at the low-voltage of secondary side
At the function that multiplex active power filtering four-quadrant commutation system AFE1, AFE2 and power grid connect, inhibits higher hamonic wave, ensure more
Iron core is still operated in unsaturated state under kind higher hamonic wave synergy.
It is preferably in any of the above-described technical solution, the multiplex active power filtering four-quadrant commutation system AFE1,
AFE2, more inverter INV1-INV8 of intermediate common DC bus, intermediate dc bus discharge loop form frequency convertor system,
The control strategy of the frequency convertor system include Frequency conversion control technology, Study on direct torque control technology, constant speed control technology,
Senseless control technology.
It is preferably in any of the above-described technical solution, the multiplex active power filtering four-quadrant commutation system AFE1,
AFE2 is that active power filtering four-quadrant rectifier is designed using multiple rectifying, has merged the control technologies of PLL containing software phase-lock loop
Rectifier intelligent grid connection control technology, the voltage and current double closed-loop technology based on fuzzy control, two level double mode space vectors
Overmodulation technique realizes power grid exchange and intermediate dc in the case where ensureing that power factor of electric network and harmonic wave meet utility network standard
The energy exchange of busbar；Described multiplex active power filtering four-quadrant commutation system AFE1, AFE2 can stablize middle dc voltage, and
It can guarantee that middle dc voltage is modulated in wider range.
It is preferably in any of the above-described technical solution, the multiplex active power filtering four-quadrant commutation system AFE1,
AFE2 includes AFE1, AFE2 this two sets of active power filtering four-quadrant rectifiers, this two sets of active power filtering four-quadrant rectifications of AFE1, AFE1
Device is inputted forms stacked rectifiers with output-parallel, and separate unit active power filtering four-quadrant rectifier system includes line leading device, active
Filter, four-quadrant fairing, intermediate dc capacitance；Two sets of active power filtering four-quadrant rectifiers AFE1, AFE2 can be used
One master one from parallel operation, also can two work independently, wherein when a set of active power filtering four-quadrant rectifier failure, Ling Yitai
It can work independently.
In any of the above-described technical solution preferably, the line leading device includes charge circuit and short circuit circuit, described
Charge circuit includes contactor 1KM2/2KM2 and charging resistor (1R1 ~ 1R3)/(2R1 ~ 2R3), and short circuit circuit includes contactor
1KM1/2KM1, when active power filtering four-quadrant rectifier, which sends out combined floodgate, to be allowed, the power up of frequency convertor system is：First close into
The contactor 1KM2 or contactor 2KM2 of line apparatus after the completion of to be charged, close short circuit to intermediate dc circuit into line precharge
After the contactor 1KM1/2KM1 of circuit, the pre-charge contactor 1KM2 and contactor 2KM2 of line leading device are disconnected, at this time at rectifier
In ready state.
In any of the above-described technical solution preferably, it is net to include the power grid that basic RI inhibits for the active filter
Change filter to use simultaneously with active rectification device, the active filter can be used for dynamic harmonic wave, compensating reactive power, energy
Enough harmonic waves to different size and frequency carry out quick tracing compensation, by sample rate current and can carry out each harmonic and idle
Separation controls size, frequency and the phase of simultaneously active output current, and quick response, offsets phase induced current in load, realizes
Dynamic tracing compensation and it can not only mend harmonic wave but also mend idle and uneven.
In any of the above-described technical solution preferably, the four-quadrant fairing is insulated using active rectification of new generation
Grid grade bipolar transistor IGBT bridge；The four-quadrant fairing is run together with active filter, is provided high performance
Rectification or feedback control, are adjusted and stably generate adjustable DC loop voltage, and then inverter can not be by primary voltage
Influence, in the primary voltage fluctuation range allowed, do not interfere with inversion output electric moter voltage；The four-quadrant rectification dress
Harmonic wave can efficiently be inhibited by setting in feedback the operation together with active filter, by voltage, current harmonics THD controls 5% with
It is interior, and reactive power compensation can be provided.
In any of the above-described technical solution preferably, more inverter INV1-INV8 of the intermediate common DC bus
Using intermediate dc common bus multiple-variable flow device energy circulation technology, this eight inverters of INV1-INV8 share intermediate dc bus,
Eight axis and the following locomotive test demand of eight axis can be met, the output end of every inverter accompanies the input terminal electricity of examination motor with one
Connection drives this that examination motor is accompanied to work, and when there is motor to be in generating state, the electric energy for the generation that generates electricity is returned by inverter
It is back to DC bus, is then reached through DC bus in inverter in parallel, other motors for being not in generating state are driven, if
Also electric energy is extra to be fed back to power grid by active power filtering four-quadrant rectifier system.
In any of the above-described technical solution preferably, more inverter INV1-INV8 of the intermediate common DC bus,
Synchronization control algorithm is used between this eight inverters of INV1-INV8, ensures the more output rotating speeds one for accompanying examination motor M1-M8
It causes, subject vehicle and locomotive bed system is made to reach stable operating point, the circuit operating condition of simulation subject vehicle.
In any of the above-described technical solution preferably, examination motor M1-M8 is accompanied to use alternating-current variable frequency motor for described more,
When experiment, more are accompanied examination motor M1-M8 to be operated in power generation or electronic operating mode, and adjustable motive force is provided for subject vehicle.
In any of the above-described technical solution preferably, the intermediate dc bus discharge loop includes brake unit and system
Dynamic resistance, the intermediate dc bus discharge loop provide double shield for intermediate dc bus voltage stabilization；The braking is single
Member opens IGBT, the energy of braking resistor exorbitant expenditure when intermediate dc bus voltage is higher than setting value, and voltage instantaneous reduces
To setting value hereinafter, brake unit blocks IGBT；When switchgear is because of fault trip, accompany examination motor that can also be carried out by discharge loop
Braking；When normal or disorderly closedown, can quick release electric energy, so that middle dc voltage is reduced to safe voltage hereinafter, convenient
Quick overhaul and the electrically operated safety of raising.
Locomotive bed is multi-axis control system, and locomotive bed is that every axis configures a whole set of and independent electrically leads at present
It includes independent high-tension switch cabinet, tractive transformer, four-quadrant rectifier, intermediate dc circuit, inverter etc. to draw system, for drop
Low testing stand cost of investment, operation cost, and reach energy conservation and environmental protection purpose, technical scheme of the present invention is intelligent simultaneously using rectifier
Net control technology, stacked rectifiers technology, intermediate dc common bus multiple-variable flow device energy circulation technology can save more set switches
Cabinet, tractive transformer, rectifier, and the energy between locomotive multi-axle motor can be realized by carrying out cycle profit on DC bus
With extra energy can also be fed back to power grid, and there are no the locomotive tests similar with technical solution of the present invention both at home and abroad at present
Platform electric drive system topology.
The direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification of the present invention is pressed off by height
Close cabinet G1, transformer TM1, multiplex active power filtering four-quadrant commutation system AFE1, AFE2, more of intermediate common DC bus it is inverse
Become device INV1-INV8, more accompany the compositions such as examination motor M1-M8, intermediate dc bus discharge loop, high-tension switch cabinet G1 connections change
Depressor TM1, transformer TM1 connection multiplex active power filtering four-quadrant commutation system AFE1, AFE2, the distribution electricity of locomotive bed
Source supplies the active filter of multiplex active power filtering four-quadrant commutation system AFE1, AFE2 via high-tension switch cabinet G1, transformer TM1
The power supply of wave four-quadrant rectifier relevant voltage grade, after multiplex active power filtering four-quadrant commutation system AFE1, AFE2
End, more inverter INV1-INV8 of intermediate common DC bus are connected in parallel on common DC bus, and every inverter respectively drives
One is accompanied examination motor.Synchronization control algorithm, guarantee is used to accompany examination between more inverter INV1-INV8 of intermediate common DC bus
The output rotating speed of motor is consistent, and subject vehicle and locomotive bed system is made to reach stable operating point, simulation subject vehicle
Circuit operating condition.
Compared with prior art, above-mentioned technical proposal of the invention has the advantages that：
（1）It is calculated by eight axis and following locomotive, because locomotive is divided into moving axis and optical axis, type of locomotive is different, moves optical axis
Position it is also different, configure a whole set of independent electric traction system, a whole set of independence so locomotive bed is every axis
Electric traction system include independent high-tension switch cabinet, tractive transformer, four-quadrant rectifier, intermediate dc circuit, inversion
Device etc., compared with conventional locomotive testing stand, technical scheme of the present invention can save more set switchgears, tractive transformer, rectifier,
Testing stand cost of investment, operation cost are reduced, and reaches energy conservation and environmental protection purpose.By taking eight axis vehicles as an example, 4 optical axis of generally 4 moving axis,
The engine of moving axis needs the electrical power of 550kW mating, rectifier, transformer, the switchgear matched needed for rectification side in a traditional way
The other general power of decile is 4.4MW, and rectifier, transformer, switchgear decile needed for technical solution using the present invention are other
General power is only 2.2MW.
（2）Commutation system described in technical scheme of the present invention is designed using multiple rectifying, and more set rectifications be not only associated with but also phase
Mutually independent, wherein under a set of rectification unit fault condition, the maskable rectification unit, remaining rectification unit is continuing with, and is passed
The independent electrical trailer system of system, if certain set rectification, transformer, switchgear any of which link go wrong, it is possible to make
At the paralysis of entire testing stand.
（3）Technical scheme of the present invention is using rectifier intelligent grid connection control technology, stacked rectifiers technology, intermediate dc
Common bus multiple-variable flow device energy circulation technology, it can be achieved that the energy between locomotive multi-axle motor by being recycled on DC bus
It utilizes, extra energy can also be fed back to power grid, electrical with similar locomotive bed of the invention not yet both at home and abroad at present
Transmission system topology.
（4）Energy can be also fed back to power grid by traditional independent electrical transmission system, some systems, but between more set systems
Control it is complicated it is difficult to ensure that power grid power factor and harmonic content.Topology described in technical scheme of the present invention, by unified whole
Stream topology control energy feedback, can guarantee that power factor of electric network and harmonic wave meet under utility network standard, realize power grid exchange with
The energy exchange of intermediate dc bus.
（5）Intermediate dc common bus system described in technical scheme of the present invention includes discharge loop, can further be stablized
Intermediate dc bus voltage ensures the stability of inversion output namely the load stability of guarantee test platform.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is that the system structure of the Six-axes locomotive electric drive system with three-phase 10kV power supplies of the prior art is shown
It is intended to；
Fig. 2 is the system structure signal of the Six-axes locomotive electric drive system with single-phase 25kV power supplies of the prior art
Figure；
Fig. 3 is the one of the direct current common bus locomotive bed electric drive system according to the invention based on multiple four-quadrant rectification
The systematic schematic diagram of preferred embodiment；
Fig. 4 is the one of the direct current common bus locomotive bed electric drive system according to the invention based on multiple four-quadrant rectification
The transformer circuit form figure of preferred embodiment；
Fig. 5 is the one of the direct current common bus locomotive bed electric drive system according to the invention based on multiple four-quadrant rectification
The frequency converter schematic diagram of preferred embodiment；
Fig. 6 is the one of the direct current common bus locomotive bed electric drive system according to the invention based on multiple four-quadrant rectification
The principle of phase lock loop block diagram of preferred embodiment.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to overcome railway locomotive testing stand electric drive system the problems of in the prior art, in order to reduce machine
Cost of investment, the operation cost of vehicle testing stand, and reach energy conservation and environmental protection purpose, the embodiment of the present invention proposes a kind of based on multiple
The direct current common bus locomotive bed electric drive system of four-quadrant rectification, the system is by high-tension switch cabinet, transformer, multiplex
Active power filtering four-quadrant commutation system, intermediate common DC bus more inverters, accompany examination motor, intermediate dc bus to discharge back
The compositions such as road, the system is using rectifier intelligent grid connection control technology, stacked rectifiers technology, intermediate dc common bus multiple-variable flow
Device energy circulation technology can save more set switchgears, tractive transformer, rectifier, and can realize between locomotive multi-axle motor
For energy by being recycled on DC bus, extra energy can also be fed back to power grid, at present both at home and abroad not yet with this
The similar locomotive bed electric drive system topology of inventive embodiments.Below in conjunction with the accompanying drawings 3 to 6 pairs of embodiment of the present invention into
Row detailed description.
The direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification of the embodiment of the present invention
System topological figure is as shown in figure 3, the system includes high-tension switch cabinet（G1）, transformer（TM1）, multiplex active power filtering four-quadrant
Commutation system（AFE1、AFE2）, intermediate common DC bus more inverters（INV1-INV8）, more accompany examination motor（M1-
M8）, intermediate dc bus discharge loop, high-tension switch cabinet（G1）Connect transformer（TM1）, transformer（TM1）Connect multiplex
Active power filtering four-quadrant commutation system（AFE1、AFE2）, locomotive bed to subject vehicle be tested for the property, locomotive bed
2200kVA/10kV power distributions via high-tension switch cabinet (G1), transformer（TM1）Supply active power filtering four-quadrant rectifier
The power supply of relevant voltage grade, in multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）Rear end, centre altogether direct current
More inverters of busbar（INV1-INV8）It is connected in parallel on common DC bus, every inverter respectively drives one and accompanies examination electricity
Machine.Synchronization control algorithm is used between more inverter INV1-INV8, ensures the more output rotating speeds one for accompanying examination motor M1-M8
It causes, subject vehicle and locomotive bed system is made to reach stable operating point, the circuit operating condition of simulation subject vehicle.
High-tension switch cabinet used in the embodiment of the present invention（G1）, high-tension switch cabinet is in high pressure three-phase power supply system, carrying
For the plant-grid connection of high voltage electric equipment, electric current that can be under splitting or integrating is normal and malfunction is protected power grid and is segmented
Isolation, can show voltage, current value, have the switch and group of the o-volt protection of control power supply and the set-up function of Protection parameters
Electric Appliance Cabinet is closed, under the power supply system of agreement, by different cabinet type carrying rated operational currents, closes, cut-off fault current.
The embodiment of the present invention uses transformer（TM1）, transformer for realizing voltage transformation and isolation, by the height of net side
Buckling changes the low-voltage of secondary side into, completes the function that multiplex active power filtering four-quadrant commutation system is connect with power grid, transformation
Device can inhibit higher hamonic wave, ensure that iron core is still operated in unsaturated state under a variety of higher hamonic wave synergy.Transformation
Device primary side be equipped with 5 grades of taps, respectively+10% ,+5%, 0%, -5%, -10%, tap-change is carried out using No-load changer mode, can
Five grades of fine tunings are carried out to the voltage of primary side.The wiring group of transformer uses D/y11 modes, particular circuit configurations such as Fig. 4 institutes
Show.
Multiplex active power filtering four-quadrant commutation system used in the embodiment of the present invention is active power filtering four-quadrant rectifier
It is designed using multiple rectifying, has merged and contained software phase-lock loop（PLL）The rectifier intelligent grid connection control technology of control technology, base
Voltage and current double closed-loop technology, two level double-mode space vector overmodulation technologies in fuzzy control are ensureing grid power
Factor and harmonic wave meet under utility network standard, realize the energy exchange of power grid exchange and intermediate dc bus.The present invention is implemented
The multiplex active power filtering four-quadrant commutation system of example can stablize middle dc voltage, and can guarantee middle dc voltage wider
It is modulated in range.The multiplex active power filtering four-quadrant commutation system of the embodiment of the present invention includes this two sets of AFE1, AFE2
Active power filtering four-quadrant rectifier, this two sets of active power filtering four-quadrant rectifier inputs of AFE1, AFE1 form more with output-parallel
Reformate stream device, separate unit active power filtering four-quadrant rectifier system include line leading device, active filter, four-quadrant rectification dress
It sets, intermediate dc capacitance；A master one can be used from parallel operation in two sets of active power filtering four-quadrant rectifiers AFE1, AFE2, also may be used
Two work independently, and wherein when a set of active power filtering four-quadrant rectifier failure, another can work independently.Line leading device packet
Containing charge circuit and short circuit circuit, charge circuit include contactor 1KM2/2KM2 and charging resistor (1R1 ~ 1R3)/(2R1 ~
2R3), short circuit circuit includes contactor 1KM1/2KM1, when active power filtering four-quadrant rectifier, which sends out combined floodgate, to be allowed, frequency converter
The power up of system is：The contactor 1KM2 or 2KM2 for first closing line leading device wait filling to intermediate dc circuit into line precharge
After the completion of electricity, after closing short circuit circuit contactor 1KM1/2KM1, the pre-charge contactor 1KM2 and 2KM2 of line leading device are disconnected,
Rectifier is in ready state at this time.Active filter includes the power grid purification filter and active rectification that basic RI inhibits
Device uses simultaneously, and active filter can be used for dynamic harmonic wave, compensating reactive power, can be to the humorous of different size and frequency
Wave carries out quick tracing compensation, by sample rate current and can carry out each harmonic and idle separation, controls and actively exports electricity
Size, frequency and the phase of stream, and quick response offset phase induced current in load, realize dynamic tracing compensation and can be both
Benefit harmonic wave is mended idle and uneven again.Four-quadrant fairing is using active rectification insulated gate grade bipolar transistor of new generation
（IGBT）Bridge；Four-quadrant fairing is run together with active filter, provides high performance rectification or feedback control, adjustable
Adjustable DC loop voltage is saved and stably generates, and then inverter can not be influenced by primary voltage, in the inlet wire allowed
In scope range of the fluctuation of voltage, the electric moter voltage of inversion output is not interfered with；Four-quadrant fairing is filled in feedback with active power filtering
Harmonic wave can efficiently be inhibited by setting operation together, can provide voltage, current harmonics THD controls to reactive power within 5%
Compensation.
More inverters of the embodiment of the present invention（INV1-INV8）Using intermediate dc common bus multiple-variable flow device energy circulation
Technology, this eight inverters of INV1-INV8 share intermediate dc bus, can meet eight axis and the following locomotive test demand of eight axis,
The output end of every inverter accompanies the input terminal of examination motor be electrically connected with one, drives this to accompany and tries motor and work, when having
When motor is in generating state, the electric energy for the generation that generates electricity is back to DC bus by inverter, is then reached through DC bus
In inverter in parallel, other motors for being not in generating state are driven, if also electric energy is extra can pass through active power filtering four-quadrant
Limit rectifier systems are fed back to power grid.
More of the embodiment of the present invention accompany examination motor M1-M8 to use alternating-current variable frequency motor, and at the trial, more are accompanied examination motor
M1-M8 is operated in power generation or electronic operating mode, and adjustable motive force is provided for subject vehicle.
The intermediate dc bus discharge loop of the embodiment of the present invention includes brake unit and braking resistor, intermediate dc bus
Discharge loop provides double shield for intermediate dc bus voltage stabilization；Brake unit is in intermediate dc bus voltage higher than setting
When value, IGBT, the energy of braking resistor exorbitant expenditure are opened, voltage instantaneous is reduced to setting value hereinafter, brake unit blocks
IGBT；When switchgear is because of fault trip, accompany examination motor that can also be braked by discharge loop；When normal or disorderly closedown,
Can quick release electric energy, so that middle dc voltage is reduced to safe voltage hereinafter, fast and easy maintenance and improving with electrically operated
Safety.
The direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification of the embodiment of the present invention, can
More set switchgears, tractive transformer, rectifier are saved, testing stand cost of investment, operation cost, energy conservation and environmental protection, this system are reduced
Commutation system designed using multiple rectifying, it is cover rectifications and be not only associated with again mutual indepedent, a set of rectification unit failure wherein more
In the case of, the maskable rectification unit, remaining rectification unit is continuing with, using rectifier intelligent grid connection control technology, multiple
The energy that rectifier technology, intermediate dc common bus multiple-variable flow device energy circulation technology realize between locomotive multi-axle motor passes through
It is recycled on DC bus, extra energy feedback to power grid, unified rectification topology control energy feedback can guarantee electricity
Net power factor and harmonic wave realize the energy exchange of power grid exchange and intermediate dc bus in the case where meeting utility network standard, intermediate
The discharge loop that direct current common bus system includes can further stablize intermediate dc bus voltage, both ensure the steady of inversion output
Qualitative namely guarantee test platform load stability.
In an embodiment of the present invention, frequency convertor system is straight altogether by multiplex active power filtering four-quadrant commutation system, centre
More inverters, the intermediate dc bus discharge loop composition of busbar are flowed, the principle of frequency convertor system is as shown in Figure 5.Frequency converter
The control strategy of system includes Frequency conversion control technology, Study on direct torque control technology, constant speed control technology, speed sensorless
Device control technology.
Phaselocked loop described in the embodiment of the present invention, principle is as shown in fig. 6, output signal frequency pair may be implemented in phaselocked loop
Frequency input signal from motion tracking, so phaselocked loop is commonly used in Closed loop track circuit.Phaselocked loop in the process of work, when
When the frequency of output signal is equal with the frequency of input signal, the phase difference value that output voltage is kept fixed with input voltage, i.e.,
The phase of output voltage and input voltage is lockable, and phaselocked loop is usually by phase discriminator（PD）, loop filter（LF）It shakes with voltage-controlled
Swing device（VCO）Three parts form.
Four-quadrant rectifier described in the embodiment of the present invention is a kind of AC/DC current transformers to work by PWM mode, passes through tune
Width, frequency and the phase of pulse are saved to control and change voltage, electric current and the size and Orientation of power.This rectifier can be
It works in all four quadrants on voltage, current planar, it may be implemented to stablize medium voltage and control power factor to be ± 1
Purpose.
The above is only that the preferred embodiment of the present invention is described, and is limited the scope of the present invention
Fixed, under the premise of not departing from design spirit of the present invention, this field ordinary engineering and technical personnel makees technical scheme of the present invention
The various modifications gone out and improvement should all be fallen into the protection domain of claims of the present invention determination.
Claims (10)
1. a kind of direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification, it is characterised in that：It
Including high-tension switch cabinet（G1）, transformer（TM1）, multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）, it is intermediate altogether
More inverters of DC bus（INV1-INV8）, more accompany examination motor（M1-M8）, intermediate dc bus discharge loop；It is described
High-tension switch cabinet（G1）Connect transformer（TM1）, the transformer（TM1）Connect multiplex active power filtering four-quadrant commutation system
（AFE1、AFE2）；The power distribution of locomotive bed is via high-tension switch cabinet (G1), transformer（TM1）It is active to supply multiplex
Filter four-quadrant commutation system（AFE1、AFE2）Active power filtering four-quadrant rectifier relevant voltage grade power supply, multiple
Change active power filtering four-quadrant commutation system（AFE1、AFE2）Rear end, more inverters of intermediate common DC bus（INV1-
INV8）It is connected in parallel on common DC bus, every inverter respectively drives one and accompanies examination motor.
2. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as described in claim 1,
It is characterized in that：The high-tension switch cabinet（G1）One end connect 2200kVA/10kV power distributions, the high-tension switch cabinet
（G1）The other end connect transformer（TM1）；The high-tension switch cabinet（G1）For in high pressure three-phase power supply system, providing high pressure
The plant-grid connection of electrical equipment, splitting or integrating normally and malfunction under electric current, to power grid carry out protection and staged isolation, show
Voltage, current value have the switch and combined electrical apparatus cabinet of the o-volt protection of control power supply and the set-up function of Protection parameters, about
Under fixed power supply system, by different cabinet type carrying rated operational currents, closes, cut-offs fault current.
3. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as described in claim 1,
It is characterized in that：The transformer（TM1）Wiring group use D/y11 modes.
4. the direct current common bus locomotive bed Electrified Transmission system based on multiple four-quadrant rectification as described in claim 1 or 3
System, it is characterised in that：The transformer（TM1）Primary side be equipped with 5 grades of taps, respectively+10% ,+5%, 0%, -5%, -10%, adopt
Tap-change is carried out with No-load changer mode, five grades of fine tunings, the transformer can be carried out to the voltage of primary side（TM1）For reality
The transformation and isolation of existing voltage complete multiplex active power filtering four-quadrant by the high pressure conversion of net side at the low-voltage of secondary side
Commutation system（AFE1、AFE2）The function being connect with power grid inhibits higher hamonic wave, ensures under a variety of higher hamonic wave synergy
Iron core is still operated in unsaturated state.
5. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as described in claim 1,
It is characterized in that：The multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）, more of intermediate common DC bus it is inverse
Become device（INV1-INV8）, intermediate dc bus discharge loop form frequency convertor system, the control strategy packet of the frequency convertor system
Technology containing Frequency conversion control, Study on direct torque control technology, constant speed control technology, senseless control technology.
6. the direct current common bus locomotive bed Electrified Transmission system based on multiple four-quadrant rectification as described in claim 1 or 5
System, it is characterised in that：The multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）For active power filtering four-quadrant rectification
Device is designed using multiple rectifying, has been merged and has been contained software phase-lock loop（PLL）The rectifier intelligent grid connection control technology of control technology,
Voltage and current double closed-loop technology, two level double-mode space vector overmodulation technologies based on fuzzy control are ensureing power grid work(
Rate factor and harmonic wave meet under utility network standard, realize the energy exchange of power grid exchange and intermediate dc bus；It is described multiple
Change active power filtering four-quadrant commutation system（AFE1、AFE2）Middle dc voltage can be stablized, and can guarantee that middle dc voltage exists
It is modulated in wider range.
7. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as claimed in claim 6,
It is characterized in that：The multiplex active power filtering four-quadrant commutation system（AFE1、AFE2）It is active including this two sets of AFE1, AFE2
Four-quadrant rectifier is filtered, this two sets of active power filtering four-quadrant rectifier inputs of AFE1, AFE1 form multiple whole with output-parallel
Flow device, separate unit active power filtering four-quadrant rectifier system include line leading device, active filter, four-quadrant fairing, in
Between DC capacitor；A master one can be used from parallel operation in two sets of active power filtering four-quadrant rectifiers AFE1, AFE2, also can two lists
Solely work, wherein when a set of active power filtering four-quadrant rectifier failure, another can work independently.
8. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as claimed in claim 7,
It is characterized in that：The line leading device includes charge circuit and short circuit circuit, and the charge circuit includes contactor（1KM2/
2KM2）With charging resistor (1R1 ~ 1R3)/(2R1 ~ 2R3), short circuit circuit includes contactor（1KM1/2KM1）, work as active power filtering
When four-quadrant rectifier sends out combined floodgate permission, the power up of frequency convertor system is：First close line leading device contactor 1KM2 or
Contactor 2KM2 after the completion of to be charged, closes short circuit circuit contactor 1KM1/2KM1 to intermediate dc circuit into line precharge
Afterwards, the pre-charge contactor 1KM2 and contactor 2KM2 of line leading device are disconnected, rectifier is in ready state at this time.
9. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as claimed in claim 7,
It is characterized in that：The active filter includes the power grid purification filter that basic RI inhibits and active rectification device simultaneously
Use, the active filter can be used for dynamic harmonic wave, compensating reactive power, can to the harmonic wave of different size and frequency into
The quick tracing compensation of row, by sample rate current and can carry out each harmonic and idle separation, control and active output current
Size, frequency and phase, and quick response offset phase induced current in load, realize dynamic tracing compensation and can both mend humorous
Wave is mended idle and uneven again.
10. the direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification as claimed in claim 7,
It is characterized in that：The four-quadrant fairing is using active rectification insulated gate grade bipolar transistor of new generation（IGBT）Bridge；
The four-quadrant fairing is run together with active filter, provide high performance rectification or feedback control, be adjusted and
Adjustable DC loop voltage is stably generated, and then inverter can not be influenced by primary voltage, in the primary voltage allowed
In fluctuation range, the electric moter voltage of inversion output is not interfered with；The four-quadrant fairing is filled in feedback with active power filtering
Harmonic wave can efficiently be inhibited by setting operation together, can provide voltage, current harmonics THD controls to reactive power benefit within 5%
It repays.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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