CN107104606A - Locomotive subordinate inverter and control method - Google Patents
Locomotive subordinate inverter and control method Download PDFInfo
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- CN107104606A CN107104606A CN201710421751.4A CN201710421751A CN107104606A CN 107104606 A CN107104606 A CN 107104606A CN 201710421751 A CN201710421751 A CN 201710421751A CN 107104606 A CN107104606 A CN 107104606A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- Inverter Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The embodiment of the present invention provides a kind of locomotive subordinate inverter and control method.The locomotive subordinate inverter includes：Voltage follower circuit and control circuit, wherein, control circuit includes positive-negative sequence voltage-separating module, Park converters, PI controllers and control impulse generator.Coordinate transform is carried out by the three-phase output voltage exported to voltage follower circuit, and further carry out positive-negative sequence separating treatment, negative sequence component is aligned to be respectively controlled, avoid the generation of wave component, PI controllers are enabled to realize floating regulation, the balance of three-phase output voltage is ensure that, ability of the locomotive subordinate inverter with unbalanced load based on three-phase three-leg inverter is realized under conditions of hardware is not increased.
Description
Technical field
The present embodiments relate to locomotive technology field, more particularly to a kind of locomotive subordinate inverter and control method.
Background technology
Power supply in electric locomotive can be divided into two major classes by the difference of function, and a class is to provide energy for the power of locomotive
The traction power source of amount, another kind of is to improve the accessory power supply of intra-locomotive environmental condition, be mainly used to as the photograph on locomotive
The power supply for electrical equipment such as bright, air-conditioning, electric water boiler and heat tracing.Wherein, the subordinate inverter in auxiliary inversion system is accessory power supply
The important component of electric power system.
With the continuous development of scientific technology, the modularization of locomotive subordinate inverter, it is high-power turn into development trend, with
Being continuously increased for locomotive overall power, auxiliary inversion system is continued to increase to the demand of single-phase load, causes auxiliary inversion system
Laod unbalance degree of uniting increases.
In the prior art, generally use and become the output voltage of the bridge arm subordinate inverter of three-phase three by three-phase static coordinate system
Two-phase rotating coordinate system is shifted to, through PI controls and decoupling, then two-phase rest frame is converted into, eventually through Vector Pulse Width Modulation
The control signal of subordinate inverter is generated, but this method applies in general to the occasion of threephase load balance, in laod unbalance
Occasion can not be applicable.In order to be able to make auxiliary inversion system possess the ability with unbalanced load, there is one kind in the prior art
Three-phase four-leg inverter, compared with three-phase three-leg inverter, adds a phase bridge arm.Although improving band unbalanced load
Ability, but because adding a phase bridge arm, the power device quantity of voltage follower circuit need to be increased, cost is not only increased,
And making circuit structure complicated so that the control of three-phase four-arm subordinate inverter is also more complicated.
The content of the invention
The embodiment of the present invention provides a kind of locomotive subordinate inverter and control method, with real under conditions of hardware is not increased
Existing ability of the locomotive subordinate inverter with unbalanced load based on three-phase three-leg inverter.
The one side of the embodiment of the present invention is to provide a kind of locomotive subordinate inverter, including：Voltage follower circuit and
Control circuit；Wherein, the control circuit includes：
Positive-negative sequence voltage-separating module, is connected with the voltage follower circuit, for receiving the voltage follower circuit
Three-phase output voltage Ua, Ub and the Uc of output, and conversion process is carried out to the three-phase output voltage, to obtain two-phase output electricity
Press U α and U β, and separating treatment carried out to the positive-negative sequence of two-phase output voltage U α and the U β, with obtain positive-sequence component U α+, U
β+and negative sequence component U α-, U β-；
Park converters, are connected with the positive-negative sequence voltage-separating module, for receive the positive-sequence component U α+, U β+
With negative sequence component U α-, U β-, and to the positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain
Dq axis components Ud-, Uq- of dq axis components Ud+, Uq+ of first positive sequence and the first negative phase-sequence under two-phase rotating coordinate system；
PI controllers, are connected with the Park converters, dq axis components Ud+, Uq+ for receiving first positive sequence
With dq axis components Ud-, Uq- of the first negative phase-sequence, and dq axis components Ud+, Uq+ and the dq axles of the first negative phase-sequence to first positive sequence
Component Ud-, Uq- carry out PI controls respectively, to obtain the dq axis components UCd+ of the second positive sequence of control output, UCq+, second negative
Dq axis components UCd-, UCq- of sequence, and according to the angular relationship of Vector Rotation angle, by the dq axis components UCd- of the second negative phase-sequence,
UCq- converts the dq axles to the second positive sequence, and is summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain control
Make the first dq shaft voltages Ud, Uq of output；
Impulse generator is controlled, is connected with the PI controllers, for receiving described first dq shaft voltage Ud, Uq, and
According to described first dq shaft voltages Ud, Uq generation control pulse.
According to locomotive subordinate inverter as described above, alternatively, the positive-negative sequence voltage-separating module includes：
Clark converters, are connected with the voltage follower circuit, and three for receiving the voltage follower circuit output
Phase output voltage Ua, Ub and Uc, and the three-phase output voltage Ua, Ub and Uc are converted into two-phase rest frame through Clark,
To obtain two-phase output voltage U α and U β；
Second Order Generalized Integrator, is connected with the Clark converters, for entering to two-phase output voltage U α and the U β
Row filtering and phase shift, to obtain phase-shifting voltages QU α and QU β, wherein Q is phase shift operator,
Positive-negative sequence symmetrical components calculator, is connected with the Second Order Generalized Integrator, for the phase-shifting voltages QU α
The calculating of positive-negative sequence symmetrical components is carried out with QU β, with obtain positive-sequence component U α+, U β+and negative sequence component U α-, U β-.
According to locomotive subordinate inverter as described above, alternatively, the PI controllers include：
First PI control units, PI controls are carried out for the d axis components Ud+ to the first positive sequence, to obtain control output
The d axis components UCd+ of second positive sequence；
2nd PI control units, PI controls are carried out for the q axis components Uq+ to the first positive sequence, to obtain control output
The q axis components UCq+ of second positive sequence；
3rd PI control units, PI controls are carried out for the d axis components Ud- to the first negative phase-sequence, to obtain control output
The d axis components UCd- of second negative phase-sequence；
4th PI control units, PI controls are carried out for the q axis components Uq- to the first negative phase-sequence, to obtain control output
The q axis components UCq- of second negative phase-sequence；
Dq axles export superimposer, for the angular relationship according to Vector Rotation angle, by the dq axis components of the second negative phase-sequence
UCd-, UCq- convert the dq axles to the second positive sequence, and are summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, with
Obtain the first dq shaft voltages Ud, Uq of control output.
According to locomotive subordinate inverter as described above, alternatively, the control impulse generator, including：
Inductive drop decoupler, is connected with the PI controllers, for receiving described first dq shaft voltage Ud, Uq, and
Obtain the inductive drop in LC wave filters in voltage follower circuit, calculate the inductive drop the first dq axles component ULd,
ULq, and to described first dq shaft voltages Ud, Uq and the inductive drop the first dq axles component ULd, ULq, and described three
Phase output voltage is overlapped in component sUd, sUq of the first dq axles, to obtain the 2nd dq shaft voltages USd, USq；
Park decommutators, are connected with the inductive drop decoupler, for receive the 2nd dq shaft voltages USd,
USq, and Park inverse transformations are carried out to described 2nd dq shaft voltages USd, USq, to obtain the electricity of the two-phase under two-phase rest frame
Press US α, US β；
Pulse width modulator, is connected with the Park decommutators, for receiving the two-phase voltage US α, US β, and right
The two-phase voltage US α, US β carry out space vector pulse width modulation, to generate control pulse.
According to locomotive subordinate inverter as described above, alternatively, the voltage follower circuit, including：
Three-phase three-leg inverter, the DC voltage Udc for receiving rectifier output, and by the DC voltage Udc
Three-phase alternating voltage is produced through the bridge arm inversion of three-phase three；
LC wave filters, are connected with the three-phase three-leg inverter, for receiving the three-phase alternating voltage, and to institute
State three-phase alternating voltage to be filtered, to obtain three-phase output voltage Ua, Ub and Uc.
The other side of the embodiment of the present invention is to provide a kind of control method of locomotive subordinate inverter, including：
Three-phase output voltage Ua, Ub and Uc are received, and conversion process is carried out to the three-phase output voltage, to obtain two-phase
Output voltage U α and U β, and separating treatment is carried out to the positive-negative sequence of two-phase output voltage U α and the U β, to obtain positive sequence point
Measure U α+, U β+and negative sequence component U α-, U β-；
To the positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain two cordic phase rotators
Dq axis components Ud+, Uq+ and dq axis components Ud-, Uq- of the first negative phase-sequence of lower first positive sequence of system；
Dq axis components Ud-, Uq- of dq axis components Ud+, Uq+ and the first negative phase-sequence to first positive sequence carry out PI respectively
Control, with the dq axis components UCd+, UCq+, the second negative phase-sequence that obtain the second positive sequence that control is exported dq axis components UCd-, UCq-,
And according to the angular relationship of Vector Rotation angle, by the dq of dq axis components UCd-, the UCq- conversion of the second negative phase-sequence to the second positive sequence
Axle, and summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first dq shaft voltages of control output
Ud、Uq；
According to described first dq shaft voltages Ud, Uq generation control pulse.
It is alternatively, described to receive three-phase output voltage Ua, Ub and Uc according to control method as described above, and to described
Three-phase output voltage carries out conversion process, to obtain two-phase output voltage U α and U β, and to two-phase output voltage the U α and U
β positive-negative sequence carries out separating treatment, with obtain positive-sequence component U α+, U β+and negative sequence component U α-, U β-, specifically include：
Three-phase output voltage Ua, Ub and Uc are received, and the three-phase output voltage Ua, Ub and Uc are converted into through Clark
Two-phase rest frame, to obtain two-phase output voltage U α and U β；
Two-phase output voltage U α and the U β is filtered and phase shift, is to obtain phase-shifting voltages QU α and QU β, wherein Q
Phase shift operator,
To phase-shifting voltages QU α and the QU β carry out positive-negative sequence symmetrical components calculating, with obtain positive-sequence component U α+, U β+
With negative sequence component U α-, U β-.
It is alternatively, described to dq axis components Ud+, Uq+ of first positive sequence and according to control method as described above
Dq axis components Ud-, Uq- of one negative phase-sequence carry out PI controls respectively, with obtain control output the second positive sequence dq axis components UCd+,
UCq+, the second negative phase-sequence dq axis components UCd-, UCq-, and according to the angular relationship of Vector Rotation angle, by the dq of the second negative phase-sequence
Axis component UCd-, UCq- converts the dq axles to the second positive sequence, and is asked respectively with dq axis components UCd+, UCq+ of the second positive sequence
With, with obtain control output the first dq shaft voltage Ud, Uq, specifically include：
PI controls are carried out to the d axis components Ud+ of the first positive sequence, with the d axis components UCd for the second positive sequence for obtaining control output
+；
PI controls are carried out to the q axis components Uq+ of the first positive sequence, with the q axis components UCq for the second positive sequence for obtaining control output
+；
PI controls are carried out to the d axis components Ud- of the first negative phase-sequence, with the d axis components for the second negative phase-sequence for obtaining control output
UCd-；
PI controls are carried out to the q axis components Uq- of the first negative phase-sequence, with the q axis components for the second negative phase-sequence for obtaining control output
UCq-；
According to the angular relationship of Vector Rotation angle, dq axis components UCd-, UCq- of the second negative phase-sequence are converted to second just
The dq axles of sequence, and summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first dq axles of control output
Voltage Ud, Uq.
It is alternatively, described according to described first dq shaft voltages Ud, Uq generation control arteries and veins according to control method as described above
Punching, is specifically included：
Described first dq shaft voltage Ud, Uq are received, and obtains the inductive drop in voltage follower circuit in LC wave filters, is counted
Component ULd, the ULq of the inductive drop in the first dq axles are calculated, and to described first dq shaft voltages Ud, Uq and the inductive drop
It is overlapped in component ULd, ULq of the first dq axles, and the three-phase output voltage in component sUd, sUq of the first dq axles,
To obtain the 2nd dq shaft voltages USd, USq；
Described 2nd dq shaft voltage USd, USq are received, and Park contravariant is carried out to described 2nd dq shaft voltages USd, USq
Change, to obtain two-phase voltage US α, the US β under two-phase rest frame；
The two-phase voltage US α, US β are received, and space vector pulse width modulation is carried out to the two-phase voltage US α, US β,
To generate control pulse.
According to control method as described above, alternatively, the three-phase output voltage Ua, Ub and Uc are locomotive auxiliary inversion
The voltage follower circuit output of device, the voltage follower circuit exports the process tool of the three-phase output voltage Ua, Ub and Uc
Body includes：
The DC voltage Udc of rectifier output is received, and the DC voltage Udc is produced three through the bridge arm inversion of three-phase three
Cross streams voltage；
The three-phase alternating voltage is filtered, to obtain three-phase output voltage Ua, Ub and Uc.
The locomotive subordinate inverter and control method provided according to embodiments of the present invention, by being exported to voltage follower circuit
Three-phase output voltage carry out coordinate transform, and further carry out positive-negative sequence separating treatment, align negative sequence component and controlled respectively
System, it is to avoid the generation of wave component caused by laod unbalance so that PI controllers can realize floating regulation, it is ensured that
The balance of three-phase output voltage, realizes the locomotive auxiliary based on three-phase three-leg inverter inverse under conditions of hardware is not increased
Become ability of the device with unbalanced load.
Brief description of the drawings
The structural representation for the locomotive subordinate inverter that Fig. 1 provides for one embodiment of the invention；
The structural representation for the voltage follower circuit that Fig. 2 provides for one embodiment of the invention；
The structural representation for the positive-negative sequence voltage-separating module that Fig. 3 provides for another embodiment of the present invention；
The structural representation for the Second Order Generalized Integrator that Fig. 4 provides for another embodiment of the present invention；
The structural representation for the PI controllers that Fig. 5 provides for another embodiment of the present invention；
The structural representation for the control impulse generator that Fig. 6 provides for another embodiment of the present invention；
The structural representation for the control circuit that Fig. 7 provides for another embodiment of the present invention；
The schematic flow sheet of the control method for the locomotive subordinate inverter that Fig. 8 provides for one embodiment of the invention；
The schematic flow sheet of the control method for the locomotive subordinate inverter that Fig. 9 provides for another embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment one
The present embodiment provides a kind of locomotive subordinate inverter, for for the power supply for electrical equipment on locomotive, locomotive auxiliary
Inverter can be arranged on locomotive.
As shown in figure 1, the structural representation of the locomotive subordinate inverter provided for embodiment, the locomotive subordinate inverter bag
Include：Voltage follower circuit and control circuit.
Voltage follower circuit is used to receive DC voltage Udc, and DC voltage Udc is produced through the bridge arm inversion of three-phase three
Three-phase alternating voltage, three-phase output voltage Ua, Ub and Uc are generated through LC filter filterings.
As shown in Fig. 2 the structural representation of the voltage follower circuit of the locomotive subordinate inverter provided for embodiment.The electricity
Voltage follower circuit includes three-phase three-leg inverter and LC wave filters.
Wherein, three-phase three-leg inverter is used for the DC voltage Udc for receiving rectifier output, and by DC voltage Udc
Three-phase alternating voltage is produced through the bridge arm inversion of three-phase three；LC wave filters, are connected with three-phase three-leg inverter, for receiving three
Cross streams voltage, and three-phase alternating voltage is filtered, to obtain three-phase output voltage Ua, Ub and Uc.
Specifically, three-phase three-leg inverter includes three-phase bridge arm, each bridge arm is made up of two power switch pipes, per phase
Draw inverter bridge output end in bridge arm midpoint.Output end connects LC wave filters, through LC filter filterings, obtains three-phase output voltage
Ua, Ub and Uc.
Circuit is controlled to be used for three-phase output voltage Ua, Ub and Uc that receiving voltage output circuit is exported, and according to the three-phase
Output voltage Ua, Ub and Uc generate the control pulse of six tunnels, feed back to the power in voltage follower circuit, control voltage output circuit
Switching tube IGBT break-make.
Wherein, the control circuit includes positive-negative sequence voltage-separating module, Park converters, PI controllers and control pulse life
Grow up to be a useful person.
Specifically, positive-negative sequence voltage-separating module, is connected with voltage follower circuit, defeated for receiving voltage output circuit
Three-phase output voltage Ua, Ub and the Uc gone out, and conversion process is carried out to three-phase output voltage, obtain two-phase output voltage U α and U
β, and separating treatment is carried out to two-phase output voltage U α and U β positive-negative sequence, with obtain positive-sequence component U α+, U β+and negative phase-sequence point
Measure U α-, U β-.
Park converters, are connected with positive-negative sequence voltage-separating module, for receive positive-sequence component U α+, U β+and negative phase-sequence point
Measure U α-, U β-, and to positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain two cordic phase rotators
Dq axis components Ud+, Uq+ and dq axis components Ud-, Uq- of the first negative phase-sequence of lower first positive sequence of system.
It should be noted that when Park is converted, give Vector Rotation angle, make positive-sequence component U α+, U β+and negative phase-sequence point
Measuring U α ,-, U β-rotates, electric voltage frequency is 50Hz, i.e., 20 milliseconds rotate a circle according to given Vector Rotation angle.Such as first
The Vector Rotation angle of the d axles of positive sequence is r, and the Vector Rotation angle of the d axles of the first negative phase-sequence is then-r, the q axles of the first positive sequence
Vector Rotation angle differs 90 °, the Vector Rotation angle of the q axles of the first negative phase-sequence with the Vector Rotation angle of the d axles of the first positive sequence
90 ° are differed with the Vector Rotation angle of the d axles of the first negative phase-sequence.It is related to dq axle rotating vector angles below, similarly
Or it is identical, subsequently repeat no more.
PI controllers, are connected with Park converters, and dq axis components Ud+, Uq+ and first for receiving the first positive sequence is negative
Dq axis components Ud-, Uq- of sequence, and dq axis components Ud+, Uq+ and dq axis components Ud-, Uq- of the first negative phase-sequence to the first positive sequence
PI controls are carried out respectively, with the dq axis components UCd+, UCq+, the second negative phase-sequence that obtain the second positive sequence that control is exported dq axis components
UCd-, UCq-, and according to the angular relationship of Vector Rotation angle, by dq axis components UCd-, the UCq- conversion of the second negative phase-sequence to the
The dq axles of two positive sequences, and summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first of control output
Dq shaft voltages Ud, Uq.
Impulse generator is controlled, is connected with PI controllers, for receiving the first dq shaft voltage Ud, Uq, and according to first
Dq shaft voltages Ud, Uq generation control pulse.
The locomotive subordinate inverter that the present embodiment is provided, is carried out by the three-phase output voltage exported to voltage follower circuit
Coordinate transform, and positive-negative sequence separating treatment is further carried out, align negative sequence component and be respectively controlled, it is to avoid laod unbalance
The generation of caused wave component so that PI controllers can realize floating regulation, it is ensured that the balance of three-phase output voltage,
The locomotive subordinate inverter based on three-phase three-leg inverter is realized under conditions of hardware is not increased with unbalanced load
Ability.
Embodiment two
The locomotive subordinate inverter that the present embodiment is provided embodiment one does further supplementary notes.
On the basis of embodiment one, further, as shown in figure 3, the locomotive subordinate inverter provided for embodiment
The structural representation of positive-negative sequence voltage-separating module, the positive-negative sequence voltage-separating module includes Clark converters, second order Generalized Product
Divide device and positive-negative sequence symmetrical components calculator.
Wherein, Clark converters are connected with voltage follower circuit, and the three-phase exported for receiving voltage output circuit is defeated
Go out voltage Ua, Ub and Uc, and three-phase output voltage Ua, Ub and Uc are converted into two-phase rest frame through Clark, to obtain two
Phase output voltage U α and U β.Specific conversion process on Clark converters can be transformed for Clark of the prior art
Journey, is not limited herein.
Second Order Generalized Integrator is connected with Clark converters, for being filtered to two-phase output voltage U α and U β and
Phase shift, to obtain phase-shifting voltages QU α and QU β, wherein Q is phase shift operator,
As shown in figure 4, being the structural representation of Second Order Generalized Integrator.The structure is closed-loop control, U α=U during stable state
α ', the present invention uses its lower state, and its specific work process is, the U α ' of U α and negative-feedback error, through proportional amplifierAfter amplification, then with the QU α ' of negative-feedback error is sought, then be multiplied with ω ', the result of multiplication obtains U α ', U α ' by integration
It is integrated again, the result of integration is multiplied with ω ' obtains QU α ', namely QU α, wherein ω '=2 × π × f are output voltage angular frequency
Rate, wherein f=50Hz.
It should be noted that needing two Second Order Generalized Integrators to obtain QU α and QU β, QU β acquisition methods and QU α
It is identical, it will not be repeated here.
Positive-negative sequence symmetrical components calculator is connected with Second Order Generalized Integrator, for being carried out to phase-shifting voltages QU α and QU β
The calculating of positive-negative sequence symmetrical components, with obtain positive-sequence component U α+, U β+and negative sequence component U α-, U β-.
Specifically,
On the basis of embodiment one, further, as shown in figure 5, the locomotive subordinate inverter provided for embodiment
The structural representation of PI controllers, the PI controllers include the first PI control units, and the 2nd PI control units, the 3rd PI controls are single
Member, the 4th PI control units and dq axles output superimposer.
Wherein, the first PI control units, PI controls are carried out for the d axis components Ud+ to the first positive sequence, defeated to obtain control
The d axis components UCd+ of the second positive sequence gone out.
2nd PI control units, PI controls are carried out for the q axis components Uq+ to the first positive sequence, to obtain control output
The q axis components UCq+ of second positive sequence.
3rd PI control units, PI controls are carried out for the d axis components Ud- to the first negative phase-sequence, to obtain control output
The d axis components UCd- of second negative phase-sequence.
4th PI control units, PI controls are carried out for the q axis components Uq- to the first negative phase-sequence, to obtain control output
The q axis components UCq- of second negative phase-sequence.
It should be noted that the control method of specific PI control units can be PI control methods of the prior art,
It is not limited herein.
Dq axles export superimposer, for the angular relationship according to Vector Rotation angle, by the dq axis components of the second negative phase-sequence
UCd-, UCq- convert the dq axles to the second positive sequence, and are summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, with
Obtain the first dq shaft voltages Ud, Uq of control output.
Specifically, according to the Vector Rotation angle r of the d axles of the second positive sequence, the Vector Rotation angle-r of the d axles of the second negative phase-sequence
And the geometric angle relation of two-phase rotating coordinate system is calculated, by dq axis components UCd-, UCq- of the second negative phase-sequence conversion to the
The dq axles of two positive sequences, wherein, the Vector Rotation angle of the Vector Rotation angle of the dq axles of the second positive sequence and the dq axles of the second negative phase-sequence,
It is identical with the Vector Rotation angle of the first positive sequence and the dq axles of the first negative phase-sequence respectively.
Result after the d axis components UCd- conversions of second negative phase-sequence, not only d axis components including the second positive sequence but also including second
The q axis components of positive sequence；Second negative phase-sequence q axis components UCq- conversion after result, be also both including the second positive sequence d axis components,
Include the q axis components of the second positive sequence again.
Wherein, Uref is the d shaft voltage set-points of the first positive sequence, the q axles of the first positive sequence, the d axles of the first negative phase-sequence and the
The voltage set-point of the q axles of one negative phase-sequence is 0.
On the basis of embodiment one, further, as shown in fig. 6, the locomotive subordinate inverter provided for embodiment
Control impulse generator structural representation, the control impulse generator include inductive drop decoupler, Park decommutators and
Pulse width modulator.
Wherein, inductive drop decoupler, is connected with PI controllers, for receiving the first dq shaft voltage Ud, Uq, and obtains
Inductive drop in voltage follower circuit in LC wave filters, calculates component ULd, the ULq of inductive drop in the first dq axles, and to the
One dq shaft voltages Ud, Uq and inductive drop exist in component ULd, ULq and three-phase output voltage Ua, Ub and Uc of the first dq axles
Component sUd, sUq of first dq axles are overlapped, to obtain the 2nd dq shaft voltages USd=(sUd+Ud+ULd), USq=(sUq+
Uq-ULq), wherein, ULd=ILd × ω × L, ULq=ILq × ω × L, wherein output voltage angular frequency=2 × π × f, its
Middle f=50Hz, L are inductance value, and ILd, ILq are component of the inductive current in the first dq axles.Wherein, three-phase output voltage Ua, Ub
It is in component sUd, sUq of the first dq axles with Uc：Three-phase output voltage Ua, Ub and Uc are obtained after Clark is converted and Park is converted
The component in the first dq axles arrived, is prior art, will not be repeated here.
Park decommutators, are connected with inductive drop decoupler, for receiving the 2nd dq shaft voltage USd, USq, and right
2nd dq shaft voltages USd, USq carries out Park inverse transformations, to obtain two-phase voltage US α, the US β under two-phase rest frame.
Pulse width modulator, is connected with Park decommutators, for receiving two-phase voltage US α, US β, and to two-phase voltage
US α, US β carry out space vector pulse width modulation, to generate control pulse.
Specifically, being modulated using space vector pulse width modulation to two-phase voltage US α, US β, the control pulse of six tunnels of generation
P1-P6, for the gate pole S1-S6 of six power switch pipe IGBT in service voltage output circuit, to control IGBT break-make.
On the basis of embodiment one, further, as shown in fig. 7, the locomotive subordinate inverter provided for embodiment
The structural representation of circuit is controlled, it has specifically included above-mentioned positive-negative sequence voltage-separating module, Park converters, the first PI controls
Unit processed, the 2nd PI control units, the 3rd PI control units, the 4th PI control units, dq axles output superimposer, inductive drop solution
Coupling device, Park decommutators and pulse width modulator, its concrete operations are same as described above with step, will not be repeated here.
On the basis of control circuit as shown in Figure 7, further, positive-negative sequence voltage-separating module can also include
Clark converters, Second Order Generalized Integrator and positive-negative sequence symmetrical components calculator, its concrete operations and step are same as described above,
It will not be repeated here.
The locomotive subordinate inverter that the present embodiment is provided, is carried out by the three-phase output voltage exported to voltage follower circuit
Coordinate transform, and positive-negative sequence separating treatment is further carried out, align negative sequence component and carry out PI controls respectively, it is to avoid wave component
Generation so that PI controllers can realize floating regulation, it is ensured that the balance of three-phase output voltage, not increase hardware
Under the conditions of realize ability of the locomotive subordinate inverter with unbalanced load based on three-phase three-leg inverter.
Embodiment three
The present embodiment provides a kind of control method of locomotive subordinate inverter, the three-phase for controlling locomotive subordinate inverter
Output voltage.The executive agent of the present embodiment is locomotive subordinate inverter, and the locomotive subordinate inverter can be arranged on locomotive
Accessory power supply in.
As shown in figure 8, the schematic flow sheet of the control method of the locomotive subordinate inverter provided for embodiment, this method bag
Include：
Step 31, three-phase output voltage Ua, Ub and Uc are received, and conversion process is carried out to three-phase output voltage, to obtain
Two-phase output voltage U α and U β, and separating treatment is carried out to two-phase output voltage U α and U β positive-negative sequence, to obtain positive sequence point
Measure U α+, U β+and negative sequence component U α-, U β-.
Specifically, receiving after three-phase output voltage Ua, Ub and Uc, three-phase output voltage Ua, Ub and Uc are entered at line translation
Reason, to obtain two-phase output voltage U α and the U β under two-phase rest frame, and to the positive and negative of two-phase output voltage U α and U β
Sequence carries out separating treatment, with obtain positive-sequence component U α+, U β+and negative sequence component U α-, U β-.
Step 32, to positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain two-phase rotation
Dq axis components Ud-, Uq- of dq axis components Ud+, Uq+ of first positive sequence and the first negative phase-sequence under coordinate system.
Specifically, to the positive-sequence component U α under two-phase rest frame+, U β+and negative sequence component U α-, U β-carry out Park changes
Change, generation two-phase rotating coordinate system under the first positive sequence dq axis components Ud+, Uq+ and the first negative phase-sequence dq axis components Ud-,
Uq-.That is after Park conversion, including two dq axles, the dq axles of the first positive sequence and the dq axles of the first negative phase-sequence, it can be produced in conversion process
Raw Vector Rotation angle.
Step 33, dq axis components Ud+, Uq+ and dq axis components Ud-, Uq- of the first negative phase-sequence to the first positive sequence is carried out respectively
PI is controlled, with obtain the dq axis components UCd+ of the second positive sequence of control output, UCq+, the dq axis components UCd- of the second negative phase-sequence,
UCq-, and according to the angular relationship of Vector Rotation angle, by dq axis components UCd-, the UCq- conversion of the second negative phase-sequence to the second positive sequence
Dq axles, and summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first dq axles electricity of control output
Press Ud, Uq.
Dq axis components Ud-, the Uq- difference of dq axis components Ud+, Uq+ and the first negative phase-sequence to the first positive sequence obtained above
PI controls are carried out, with the dq axis components UCd+, UCq+, the second negative phase-sequence that obtain the second positive sequence that control is exported dq axis components
UCd-, UCq-, and the angular relationship of the Vector Rotation angle according to above-mentioned generation, by the dq axis components UCd- of the second negative phase-sequence,
UCq- converts the dq axles to the second positive sequence, and is summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain control
Make the first dq shaft voltages Ud, Uq of output.
Step 34, according to the first dq shaft voltages Ud, Uq generation control pulses.
Specifically, according to the first dq shaft voltage Ud, Uq, decoupled through inductive drop, Park coordinates inverse transformation and pulsewidth modulation
Generation control pulse.
On the control method in the present embodiment, the wherein concrete operations of each step aid in inverse in the relevant locomotive
It is described in detail in the embodiment for becoming device, explanation will be not set forth in detail herein.
The control method for the locomotive subordinate inverter that the present embodiment is provided, it is defeated by the three-phase exported to voltage follower circuit
Go out voltage and carry out coordinate transform, and further carry out positive-negative sequence separating treatment, align negative sequence component and carry out PI controls respectively, it is to avoid
The generation of wave component so that PI controllers can realize floating regulation, it is ensured that the balance of three-phase output voltage, not
Ability of the locomotive subordinate inverter with unbalanced load based on three-phase three-leg inverter is realized under conditions of increase hardware.
Example IV
The control method for the locomotive subordinate inverter that the present embodiment is provided embodiment three does further supplementary notes.
As shown in figure 9, the schematic flow sheet of the control method of the locomotive subordinate inverter provided for embodiment, this method bag
Include：
Step 41, three-phase output voltage Ua, Ub and Uc are received, and three-phase output voltage Ua, Ub and Uc are converted through Clark
To two-phase rest frame, to obtain two-phase output voltage U α and U β.
Step 42, two-phase output voltage U α and U β are filtered and phase shift, to obtain phase-shifting voltages QU α and QU β, wherein
Q is phase shift operator.
Wherein,
Step 43, to phase-shifting voltages QU α and QU β carry out positive-negative sequence symmetrical components calculating, with obtain positive-sequence component U α+, U
β+and negative sequence component U α-, U β-.
Step 44, to positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain two-phase rotation
Dq axis components Ud-, Uq- of dq axis components Ud+, Uq+ of first positive sequence and the first negative phase-sequence under coordinate system.
The concrete operations of the step are consistent with step 32, will not be repeated here.
Step 45, dq axis components Ud+, Uq+ and dq axis components Ud-, Uq- of the first negative phase-sequence to the first positive sequence is carried out respectively
PI is controlled, with obtain the dq axis components UCd+ of the second positive sequence of control output, UCq+, the dq axis components UCd- of the second negative phase-sequence,
UCq-, and according to the angular relationship of Vector Rotation angle, by dq axis components UCd-, the UCq- conversion of the second negative phase-sequence to the second positive sequence
Dq axles, and summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first dq axles electricity of control output
Press Ud, Uq.
The concrete operations of the step are consistent with step 33, will not be repeated here.
Step 46, according to the first dq shaft voltages Ud, Uq generation control pulses.
The concrete operations of the step are consistent with step 34, will not be repeated here.
Further, step 45 can be specifically included：
Step 451, PI controls are carried out to the d axis components Ud+ of the first positive sequence, with the d for the second positive sequence for obtaining control output
Axis component UCd+.
Step 452, PI controls are carried out to the q axis components Uq+ of the first positive sequence, with the q for the second positive sequence for obtaining control output
Axis component UCq+.
Step 453, PI controls are carried out to the d axis components Ud- of the first negative phase-sequence, with the d for the second negative phase-sequence for obtaining control output
Axis component UCd-.
Step 454, PI controls are carried out to the q axis components Uq- of the first negative phase-sequence, with the q for the second negative phase-sequence for obtaining control output
Axis component UCq-.
Step 455, according to the angular relationship of Vector Rotation angle, dq axis components UCd-, UCq- of the second negative phase-sequence are converted
Summed respectively to the dq axles of the second positive sequence, and with dq axis components UCd+, UCq+ of the second positive sequence, to obtain control output
First dq shaft voltages Ud, Uq.
It should be noted that step 451-454 is four steps arranged side by side, without sequencing.
Further, step 46 can be specifically included：
Step 461, the first dq shaft voltage Ud, Uq is received, and obtains the electricity of the inductance in voltage follower circuit in LC wave filters
Pressure, calculates component ULd, the ULq of inductive drop in the first dq axles, and to the first dq shaft voltages Ud, Uq and inductive drop first
Component ULd, ULq of dq axles, and three-phase output voltage are overlapped in component sUd, sUq of the first dq axles, to obtain second
Dq shaft voltages USd, USq.
Step 462, the 2nd dq shaft voltage USd, USq is received, and Park contravariant is carried out to the 2nd dq shaft voltages USd, USq
Change, to obtain two-phase voltage US α, the US β under two-phase rest frame.
Step 463, two-phase voltage US α, US β are received, and space vector pulse width modulation is carried out to two-phase voltage US α, US β,
To generate control pulse.
Further, three-phase output voltage Ua, Ub and Uc export for the voltage follower circuit of locomotive subordinate inverter, electricity
Voltage follower circuit output three-phase output voltage Ua, Ub and Uc process can specifically include：
The DC voltage Udc of rectifier output is received, and DC voltage Udc is produced three through the bridge arm inversion of three-phase three and is intersected
Flow voltage.
Three-phase alternating voltage is filtered, to obtain three-phase output voltage Ua, Ub and Uc.
On the control method in the present embodiment, the wherein concrete operations of each step aid in inverse in the relevant locomotive
It is described in detail in the embodiment for becoming device, explanation will be not set forth in detail herein.
The control method for the locomotive subordinate inverter that the present embodiment is provided, it is defeated by the three-phase exported to voltage follower circuit
Go out voltage and carry out coordinate transform, and further carry out positive-negative sequence separating treatment, align negative sequence component and carry out PI controls respectively, it is to avoid
The generation of wave component so that PI controllers can realize floating regulation, it is ensured that the balance of three-phase output voltage, not
Ability of the locomotive subordinate inverter with unbalanced load based on three-phase three-leg inverter is realized under conditions of increase hardware.
, can be by it in several embodiments provided by the present invention, it should be understood that disclosed apparatus and method
Its mode is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, only
Only a kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can be tied
Another system is closed or is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed
Coupling each other or direct-coupling or communication connection can be the INDIRECT COUPLINGs or logical of device or unit by some interfaces
Letter connection, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer
Equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform the present invention each
The part steps of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Those skilled in the art can be understood that, for convenience and simplicity of description, only with above-mentioned each functional module
Division progress for example, in practical application, can distribute complete by different functional modules by above-mentioned functions as needed
Into the internal structure of device being divided into different functional modules, to complete all or part of function described above.On
The specific work process of the device of description is stated, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of locomotive subordinate inverter, it is characterised in that including：Voltage follower circuit and control circuit；Wherein, the control
Circuit processed includes：
Positive-negative sequence voltage-separating module, is connected with the voltage follower circuit, for receiving the voltage follower circuit output
Three-phase output voltage Ua, Ub and Uc, and to the three-phase output voltage carry out conversion process, to obtain two-phase output voltage U α
With U β, and separating treatment is carried out to the positive-negative sequence of two-phase output voltage U α and the U β, with obtain positive-sequence component U α+, U β+and
Negative sequence component U α-, U β-；
Park converters, are connected with the positive-negative sequence voltage-separating module, for receive the positive-sequence component U α+, U β+and negative
Order components U α-, U β-, and to the positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain two-phase
Dq axis components Ud-, Uq- of dq axis components Ud+, Uq+ of first positive sequence and the first negative phase-sequence under rotating coordinate system；
PI controllers, are connected with the Park converters, dq axis components Ud+, Uq+ and for receiving first positive sequence
Dq axis components Ud-, Uq- of one negative phase-sequence, and dq axis components Ud+, Uq+ and the dq axis components of the first negative phase-sequence to first positive sequence
Ud-, Uq- carry out PI controls respectively, to obtain the dq axis components UCd+ of the second positive sequence, UCq+, the second negative phase-sequence of control output
Dq axis components UCd-, UCq-, and according to the angular relationship of Vector Rotation angle, by dq axis components UCd-, UCq- of the second negative phase-sequence
The dq axles to the second positive sequence are converted, and are summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, it is defeated to obtain control
The first dq shaft voltages Ud, the Uq gone out；
Impulse generator is controlled, is connected with the PI controllers, for receiving described first dq shaft voltage Ud, Uq, and according to
First dq shaft voltages Ud, Uq generation control pulse.
2. locomotive subordinate inverter according to claim 1, it is characterised in that the positive-negative sequence voltage-separating module bag
Include：
Clark converters, are connected with the voltage follower circuit, and the three-phase for receiving the voltage follower circuit output is defeated
Go out voltage Ua, Ub and Uc, and the three-phase output voltage Ua, Ub and Uc are converted into two-phase rest frame through Clark, to obtain
Take two-phase output voltage U α and U β；
Second Order Generalized Integrator, is connected with the Clark converters, for being filtered to two-phase output voltage U α and the U β
Ripple and phase shift, to obtain phase-shifting voltages QU α and QU β, wherein Q is phase shift operator, Q=e-jπ/2；
Positive-negative sequence symmetrical components calculator, is connected with the Second Order Generalized Integrator, for phase-shifting voltages the QU α and QU
β carries out the calculating of positive-negative sequence symmetrical components, with obtain positive-sequence component U α+, U β+and negative sequence component U α-, U β-.
3. locomotive subordinate inverter according to claim 1, it is characterised in that the PI controllers include：
First PI control units, PI controls are carried out for the d axis components Ud+ to the first positive sequence, to obtain the second of control output
The d axis components UCd+ of positive sequence；
2nd PI control units, PI controls are carried out for the q axis components Uq+ to the first positive sequence, to obtain the second of control output
The q axis components UCq+ of positive sequence；
3rd PI control units, PI controls are carried out for the d axis components Ud- to the first negative phase-sequence, to obtain the second of control output
The d axis components UCd- of negative phase-sequence；
4th PI control units, PI controls are carried out for the q axis components Uq- to the first negative phase-sequence, to obtain the second of control output
The q axis components UCq- of negative phase-sequence；
Dq axles export superimposer, for the angular relationship according to Vector Rotation angle, by the dq axis components UCd- of the second negative phase-sequence,
UCq- converts the dq axles to the second positive sequence, and is summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain control
Make the first dq shaft voltages Ud, Uq of output.
4. locomotive subordinate inverter according to claim 1, it is characterised in that the control impulse generator, including：
Inductive drop decoupler, is connected with the PI controllers, for receiving described first dq shaft voltage Ud, Uq, and obtains
Inductive drop in voltage follower circuit in LC wave filters, calculates component ULd, the ULq of the inductive drop in the first dq axles, and
To described first dq shaft voltages Ud, Uq and the inductive drop in component ULd, Ulq of the first dq axles, and three-phase output
Voltage is overlapped in component sUd, sUq of the first dq axles, to obtain the 2nd dq shaft voltages USd, USq；
Park decommutators, are connected with the inductive drop decoupler, for receiving described 2nd dq shaft voltage USd, USq,
And Park inverse transformations are carried out to described 2nd dq shaft voltages USd, USq, to obtain the two-phase voltage US under two-phase rest frame
α、USβ；
Pulse width modulator, is connected with the Park decommutators, for receiving the two-phase voltage US α, US β, and to described
Two-phase voltage US α, US β carry out space vector pulse width modulation, to generate control pulse.
5. the locomotive subordinate inverter according to claim any one of 1-4, it is characterised in that the voltage follower circuit,
Including：
Three-phase three-leg inverter, the DC voltage Udc for receiving rectifier output, and by the DC voltage Udc through three
The bridge arm inversion of phase three produces three-phase alternating voltage；
LC wave filters, are connected with the three-phase three-leg inverter, for receiving the three-phase alternating voltage, and to described three
Cross streams voltage is filtered, to obtain three-phase output voltage Ua, Ub and Uc.
6. a kind of control method of locomotive subordinate inverter, it is characterised in that including：
Three-phase output voltage Ua, Ub and Uc are received, and conversion process is carried out to the three-phase output voltage, to obtain two-phase output
Voltage U α and U β, and separating treatment is carried out to the positive-negative sequence of two-phase output voltage U α and the U β, to obtain positive-sequence component U α
+, U β+and negative sequence component U α-, U β-；
To the positive-sequence component U α+, U β+and negative sequence component U α-, U β-carry out Park conversion, to obtain under two-phase rotating coordinate system
Dq axis components Ud+, Uq+ of first positive sequence and dq axis components Ud-, Uq- of the first negative phase-sequence；
Dq axis components Ud-, Uq- of dq axis components Ud+, Uq+ and the first negative phase-sequence to first positive sequence carry out PI controls respectively,
The dq axis components UCd+ of the second positive sequence exported with acquisition control, UCq+, dq axis components UCd-, UCq- of the second negative phase-sequence, and root
According to the angular relationship of Vector Rotation angle, by the dq axles of dq axis components UCd-, the UCq- conversion of the second negative phase-sequence to the second positive sequence, and
Summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first dq shaft voltages Ud, Uq of control output；
According to described first dq shaft voltages Ud, Uq generation control pulse.
7. control method according to claim 6, it is characterised in that reception three-phase output voltage Ua, Ub and the Uc, and
Conversion process is carried out to the three-phase output voltage, to obtain two-phase output voltage U α and U β, and electricity is exported to the two-phase
Press U α and U β positive-negative sequence to carry out separating treatment, with obtain positive-sequence component U α+, U β+and negative sequence component U α-, U β-, specifically include：
Three-phase output voltage Ua, Ub and Uc are received, and the three-phase output voltage Ua, Ub and Uc are converted into two-phase through Clark
Rest frame, to obtain two-phase output voltage U α and U β；
Two-phase output voltage U α and the U β is filtered and phase shift, to obtain phase-shifting voltages QU α and QU β, wherein Q is phase shift
Operator, Q=e-jπ/2；
The calculating of positive-negative sequence symmetrical components is carried out to phase-shifting voltages QU α and the QU β, with obtain positive-sequence component U α+, U β+and negative
Order components U α-, U β-.
8. control method according to claim 6, it is characterised in that the dq axis components Ud+ to first positive sequence,
Dq axis components Ud-, Uq- of Uq+ and the first negative phase-sequence carry out PI controls respectively, with the dq axles point for the second positive sequence for obtaining control output
UCd+, UCq+, dq axis components UCd-, UCq- of the second negative phase-sequence are measured, and according to the angular relationship of Vector Rotation angle, it is negative by second
Dq axis components UCd-, UCq- of sequence convert the dq axles to the second positive sequence, and distinguish with dq axis components UCd+, UCq+ of the second positive sequence
Summed, to obtain the first dq shaft voltage Ud, Uq of control output, specifically included：
PI controls are carried out to the d axis components Ud+ of the first positive sequence, with the d axis components UCd+ for the second positive sequence for obtaining control output；
PI controls are carried out to the q axis components Uq+ of the first positive sequence, with the q axis components UCq+ for the second positive sequence for obtaining control output；
PI controls are carried out to the d axis components Ud- of the first negative phase-sequence, with the d axis components UCd- for the second negative phase-sequence for obtaining control output；
PI controls are carried out to the q axis components Uq- of the first negative phase-sequence, with the q axis components UCq- for the second negative phase-sequence for obtaining control output；
According to the angular relationship of Vector Rotation angle, by dq axis components UCd-, the UCq- conversion of the second negative phase-sequence to the second positive sequence
Dq axles, and summed respectively with dq axis components UCd+, UCq+ of the second positive sequence, to obtain the first dq shaft voltages of control output
Ud、Uq。
9. control method according to claim 6, it is characterised in that described to be given birth to according to described first dq shaft voltages Ud, Uq
Into control pulse, specifically include：
Described first dq shaft voltage Ud, Uq are received, and obtains the inductive drop in voltage follower circuit in LC wave filters, institute is calculated
Component ULd, the ULq of inductive drop in the first dq axles are stated, and to described first dq shaft voltages Ud, Uq and the inductive drop
Component ULd, ULq of one dq axles, and the three-phase output voltage are overlapped in component sUd, sUq of the first dq axles, to obtain
Take the 2nd dq shaft voltages USd, USq；
Described 2nd dq shaft voltage USd, USq are received, and Park inverse transformations are carried out to described 2nd dq shaft voltages USd, USq, with
Obtain two-phase voltage US α, the US β under two-phase rest frame；
The two-phase voltage US α, US β are received, and space vector pulse width modulation is carried out to the two-phase voltage US α, US β, with life
Into control pulse.
10. the control method according to claim any one of 6-9, it is characterised in that the three-phase output voltage Ua, Ub and
Uc exports for the voltage follower circuit of locomotive subordinate inverter, and the voltage follower circuit exports the three-phase output voltage
Ua, Ub and Uc process are specifically included：
The DC voltage Udc of rectifier output is received, and the DC voltage Udc is produced three through the bridge arm inversion of three-phase three and is intersected
Flow voltage；
The three-phase alternating voltage is filtered, to obtain three-phase output voltage Ua, Ub and Uc.
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| CN109861253B (en) * | 2018-12-19 | 2022-11-18 | 深圳市艾普诺电子有限公司 | Method for inhibiting unbalance of UPS three-phase output voltage |
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| US11101741B2 (en) | 2019-03-20 | 2021-08-24 | Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. | Parallel control method and system for single-phase inverters and inverter |
| CN113650628A (en) * | 2021-09-03 | 2021-11-16 | 西安中车永电电气有限公司 | Intelligent tourism electric motor train unit traction auxiliary power supply system capable of dispersing power |
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