CN106541829B - Auxiliary power supply device for railway vehicle and control method thereof - Google Patents

Auxiliary power supply device for railway vehicle and control method thereof Download PDF

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Publication number
CN106541829B
CN106541829B CN201710020051.4A CN201710020051A CN106541829B CN 106541829 B CN106541829 B CN 106541829B CN 201710020051 A CN201710020051 A CN 201710020051A CN 106541829 B CN106541829 B CN 106541829B
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China
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voltage
rectifier
modulation
current
phase
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CN106541829A (en
Inventor
杨伟
相里燕妮
张鹏
岳文开
高波
李航
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CRRC Xian YongeJieTong Electric Co Ltd
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CRRC Xian YongeJieTong Electric Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Abstract

The invention provides an auxiliary power supply device for a railway vehicle and a control method thereof, wherein the device comprises the following components: the system comprises a rectifier, an inverter, a first controller and a second controller, wherein the rectifier is connected with a single-phase alternating-current voltage power supply and converts the single-phase alternating-current voltage into direct-current voltage; the inverter is connected with the rectifier and converts the direct-current voltage output by the rectifier into three-phase alternating-current voltage; the first controller is connected with the rectifier to enable the direct current voltage output by the rectifier to be stabilized at a first voltage set value; and the three-phase alternating voltage output by the inverter is stabilized at a second voltage set value through the connection of the second controller and the inverter, so that the auxiliary power supply device of the railway vehicle obtains voltage-stabilized power supply voltage, and the problem that the stability of the power supply voltage of the auxiliary power supply device of the railway vehicle is poor due to fluctuation of the voltage on the direct current side of the rectifier of the auxiliary power supply device of the railway vehicle in the prior art is solved.

Description

Auxiliary power supply device for railway vehicle and control method thereof
Technical Field
The embodiment of the invention relates to the field of vehicle power supply, in particular to an auxiliary power supply device for a railway vehicle and a control method thereof.
Background
The auxiliary power supply device for the rail vehicle is an important component of the rail vehicle such as a motor car, a high-speed rail, a subway, an electric locomotive and the like, provides power supply voltage for equipment such as an air conditioner, a brake air compressor and a charger of the rail vehicle, and is a basis for stable and reliable operation of the rail vehicle.
In the prior art, a traction inverter of a railway vehicle and an inverter of a railway vehicle auxiliary power supply device need to jointly take power from a direct current side of a rectifier of the railway vehicle auxiliary power supply device, but the voltage of the direct current side of the rectifier of the railway vehicle auxiliary power supply device fluctuates due to start and stop of the traction inverter, so that the stability of the power supply voltage of the railway vehicle auxiliary power supply device is poor.
Disclosure of Invention
The invention provides an auxiliary power supply device for a railway vehicle and a control method thereof, which aim to solve the problem that the stability of the power supply voltage of the auxiliary power supply device for the railway vehicle is poor because the voltage of the direct current side of a rectifier of the auxiliary power supply device for the railway vehicle fluctuates due to the start and stop of a traction inverter.
In a first aspect, the present invention provides a rail vehicle auxiliary power supply apparatus comprising: the system comprises a rectifier, an inverter, a first controller and a second controller;
The rectifier is used for being connected with a single-phase alternating voltage power supply and converting the single-phase alternating voltage into direct voltage;
the inverter is connected with the rectifier and is used for converting the direct-current voltage output by the rectifier into three-phase alternating-current voltage;
the first controller is connected with the rectifier and is used for stabilizing the direct current voltage output by the rectifier at a first voltage given value;
the second controller is connected with the inverter and is used for stabilizing the three-phase alternating voltage output by the inverter at a second voltage set value.
Optionally, the rectifier includes four insulated gate bipolar transistors IGBTs; the first controller includes: the direct-current voltage outer ring control module, the first modulated wave calculation module and the first Sinusoidal Pulse Width Modulation (SPWM) module; the rectifier is provided with a first voltage sensor, and the direct-current voltage outer ring control module is used for receiving an instantaneous value of the output voltage of the rectifier from the first voltage sensor and calculating to obtain a first modulation quantity according to the first voltage given value of the rectifier; the first modulation wave calculation module is connected with the direct-current voltage outer ring control module and is used for receiving the first modulation quantity, carrying out signal modulation on the first modulation quantity and calculating to obtain a first modulation wave signal; the first SPWM module is respectively connected with the first modulation wave calculation module and the four IGBTs and is used for receiving the first modulation wave signals and calculating four paths of first PWM pulse driving signals according to the first modulation wave signals so that the four IGBTs of the rectifier stabilize the direct current voltage at the given value of the first voltage according to the direct current voltage value output by the first PWM pulse driving signals.
Optionally, the first controller further includes: the phase-locked loop module and the current inner loop control module;
the current inner loop control module is respectively connected with the direct-current voltage outer loop control module, the first modulation wave calculation module and the phase-locked loop module; the phase-locked loop module is also connected with the first modulated wave calculation module; the phase-locked loop module is used for receiving an instantaneous value of the input voltage of the rectifier from the second voltage sensor and calculating an actual phase angle of the input voltage of the rectifier according to a given angular frequency of the input voltage of the rectifier; the rectifier is provided with a first current sensor, the current inner loop control module is used for receiving an instantaneous value of input current of the rectifier from the first current sensor, receiving the first modulation quantity from the direct-current voltage outer loop control module, receiving an actual phase angle of input voltage of the rectifier from the phase-locked loop module and calculating to obtain a second modulation quantity; the first modulation wave calculation module is specifically configured to receive the second modulation amount from the current inner loop control module, receive an actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and perform signal modulation on the second modulation amount according to the actual phase angle of the input voltage of the rectifier, so as to calculate a second modulation wave signal; the first SPWM module is specifically configured to receive the second modulated wave signal, and calculate four paths of second PWM pulse driving signals according to the second modulated wave signal, so that the four IGBTs of the rectifier stabilize the DC voltage at the first voltage given value according to the DC voltage value output by the second PWM pulse driving signals.
Optionally, the inverter comprises six IGBTs; the second controller includes: the system comprises an alternating current voltage ring control module, a second modulation wave calculation module and a second SPWM module; the inverter is provided with a third voltage sensor, and the alternating current voltage loop control module is used for receiving an instantaneous value of the output voltage of the inverter from the third voltage sensor and calculating to obtain a third modulation quantity according to the second voltage given value of the inverter; the second modulation wave calculation module is connected with the alternating current voltage ring control module and is used for receiving the third modulation quantity, carrying out signal modulation on the third modulation quantity and calculating to obtain a third modulation wave signal; the second SPWM module is respectively connected with the second modulation wave calculation module and the six IGBTs and is used for receiving the third modulation wave signal and calculating to obtain six paths of third PWM pulse driving signals according to the third modulation wave signal so that three-phase alternating current voltage values output by the six IGBTs of the inverter are stabilized at the second voltage given value according to the third PWM pulse driving signals.
Optionally, the second controller further includes: a load current feedforward control module connected with the second modulation wave calculation module; the inverter is provided with a second current sensor, and the load current feedforward control module is used for receiving three-phase load current from the second current sensor and calculating a fourth modulation quantity; the second modulation wave calculation module is specifically configured to receive the third modulation amount from the ac voltage loop control module, receive the fourth modulation amount from the load current feedforward control module, and perform signal modulation on the third modulation amount and the fourth modulation amount, so as to calculate a fourth modulation wave signal; the second SPWM module is specifically configured to receive the fourth modulated wave signal, and calculate, according to the fourth modulated wave signal, six paths of fourth PWM pulse driving signals, so that six IGBTs of the inverter stabilize, according to the third PWM pulse driving signal, a three-phase ac voltage value output by the third PWM pulse driving signal at the second voltage set value.
Optionally, the second controller further includes: the direct-current bus voltage feedforward control module is connected with the second modulated wave calculation module; the direct current bus voltage feedforward control module is used for receiving an instantaneous value of the output voltage of the rectifier from the first voltage sensor and calculating to obtain a fifth modulation quantity; the second modulation wave calculation module is specifically configured to receive the third modulation amount from the ac voltage loop control module, receive the fourth modulation amount from the load current feedforward control module, receive the fifth modulation amount from the dc bus voltage feedforward control module, and perform signal modulation on the third modulation amount, the fourth modulation amount, and the fifth modulation amount, to calculate a fifth modulation wave signal; the second SPWM module is specifically configured to receive the fifth modulated wave signal, and calculate, according to the fifth modulated wave signal, six paths of fifth PWM pulse signals, so that six IGBTs of the inverter stabilize, according to the third phase ac voltage value output by the fifth PWM pulse signal, at the second voltage given value.
Optionally, the auxiliary power supply device for a railway vehicle further includes: alternating current inductance, direct current capacitance, alternating current filter inductance, alternating current filter capacitance and three-phase isolation transformer;
The alternating current inductor is connected with the input end of the rectifier and is connected with the single-phase alternating current voltage power supply; the DC capacitor is connected in parallel between the DC lines of the output end of the rectifier, the AC filter inductor is connected with the output end of the inverter, the AC filter capacitor is connected in parallel between the AC lines of the output end of the AC filter inductor, and the three-phase isolation transformer is connected with the output end of the AC filter inductor.
In a second aspect, the present invention provides a method of controlling a rail vehicle auxiliary power supply apparatus, the vehicle auxiliary power supply apparatus including: the system comprises a rectifier, an inverter, a first controller and a second controller; the rectifier is connected with a single-phase alternating-current voltage power supply and is connected with the inverter; the first controller is connected with the rectifier, and the second controller is connected with the inverter;
the method comprises the following steps:
the first controller receives the direct current voltage output by the rectifier and adjusts the direct current voltage output by the rectifier according to a first voltage given value of the rectifier so as to enable the direct current voltage output by the rectifier to be stabilized at the first voltage given value;
The second controller receives the three-phase alternating current voltage output by the inverter and adjusts the voltage of the three-phase alternating current output by the inverter according to a second voltage set value of the inverter so as to enable the three-phase alternating current voltage output by the inverter to be stabilized at the second voltage set value.
Optionally, the rectifier comprises four IGBTs; the first controller includes: the device comprises a direct-current voltage outer ring control module, a phase-locked loop module, a current inner ring control module, a first modulated wave calculation module and a first SPWM module; the direct-current voltage outer loop control module is connected with the current inner loop control module, the current inner loop control module is connected with the first modulation wave calculation module, the first modulation wave calculation module is connected with the first SPWM module, and the phase-locked loop module is respectively connected with the current inner loop control module and the first modulation wave calculation module;
the method comprises the following steps:
the direct-current voltage outer ring control module receives an instantaneous value of the output voltage of the rectifier from a first voltage sensor arranged on the rectifier, and calculates a first modulation amount according to the first voltage given value of the rectifier;
The phase-locked loop module receives an instantaneous value of the input voltage of the rectifier from a second voltage sensor arranged on the rectifier, and calculates an actual phase angle of the input voltage of the rectifier according to a given angular frequency of the input voltage of the rectifier;
the current inner loop control module receives an instantaneous value of the input current of the rectifier from a first current sensor arranged on the rectifier, receives the first modulation amount from the direct-current voltage outer loop control module, receives an actual phase angle of the input voltage of the rectifier from the first current sensor, and calculates a second modulation amount;
the first modulation wave calculation module receives the second modulation quantity from the current inner loop control module, receives the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and carries out signal modulation on the second modulation quantity according to the actual phase angle of the input voltage of the rectifier, so as to calculate a second modulation wave signal;
the first SPWM module receives the second modulated wave signal and calculates four paths of second PWM pulse driving signals according to the second modulated wave signal;
And four IGBTs of the rectifier receive the second PWM pulse driving signal and output direct-current voltage with the voltage value stabilized at the given value of the first voltage according to the second PWM pulse driving signal.
Optionally, the inverter comprises six IGBTs; the second controller includes: the system comprises an alternating current voltage loop control module, a load current feedforward control module, a direct current bus voltage feedforward control module, a second modulation wave calculation module and a second SPWM module; the second modulation wave calculation module is respectively connected with the alternating current voltage ring control module, the load current feedforward control module, the direct current bus voltage feedforward control module and the second SPWM module;
the method comprises the following steps:
the alternating current voltage loop control module receives an instantaneous value of the output voltage of the inverter from a third voltage sensor arranged on the inverter, and calculates a third modulation amount according to the second voltage given value of the inverter;
the load current feedforward control module receives three-phase load current from a second current sensor arranged on the inverter and calculates a fourth modulation amount;
the direct current bus voltage feedforward control module receives an instantaneous value of the output voltage of the rectifier from the first voltage sensor arranged on the rectifier, and calculates a fifth modulation amount;
The second modulation wave calculation module receives the third modulation amount, the fourth modulation amount and the fifth modulation amount, and performs signal modulation on the third modulation amount, the fourth modulation amount and the fifth modulation amount, so as to calculate a fifth modulation wave signal;
the two SPWM modules receive the fifth modulated wave signals and calculate six paths of PWM pulse signals according to the fifth modulated wave signals;
six IGBTs of the inverter receive the fifth PWM pulse driving signal and output three-phase alternating-current voltage with the voltage value stabilized at the second voltage given value according to the fifth PWM pulse driving signal.
According to the embodiment of the invention, the rectifier of the auxiliary power supply device for the railway vehicle is connected with a single-phase alternating-current voltage power supply and converts the single-phase alternating-current voltage into direct-current voltage; the inverter is connected with the rectifier and converts the direct-current voltage output by the rectifier into three-phase alternating-current voltage; the first controller is connected with the rectifier to enable the direct current voltage output by the rectifier to be stabilized at a first voltage set value; and the three-phase alternating voltage output by the inverter is stabilized at a second voltage set value through the connection of the second controller and the inverter, so that the auxiliary power supply device of the railway vehicle obtains voltage-stabilized power supply voltage, and the problem that the stability of the power supply voltage of the auxiliary power supply device of the railway vehicle is poor due to fluctuation of the voltage on the direct current side of the rectifier of the auxiliary power supply device of the railway vehicle in the prior art is solved.
Drawings
Fig. 1 is a schematic structural view of an auxiliary power unit for a railway vehicle according to an exemplary embodiment;
FIG. 2 is a schematic diagram of the rectifier and inverter of the embodiment shown in FIG. 1;
FIG. 3 is a schematic diagram of a first controller according to the embodiment shown in FIG. 1;
FIG. 4 is another schematic diagram of the first controller of the embodiment shown in FIG. 1;
FIG. 5 is a schematic diagram of a second controller according to the embodiment shown in FIG. 1;
FIG. 6 is another schematic diagram of the second controller of the embodiment shown in FIG. 1;
FIG. 7 is another schematic diagram of the second controller of the embodiment shown in FIG. 1;
FIG. 8 is a flow chart illustrating a method of controlling a rail vehicle auxiliary power unit according to an exemplary embodiment;
fig. 9 is a flowchart illustrating a control method of an auxiliary power unit for a railway vehicle according to another exemplary embodiment.
Reference numerals:
the power supply comprises a rectifier 110, an inverter 120, a first controller 130, a second controller 140, an insulated gate bipolar transistor 111, a direct-current voltage outer loop control module 131, a first modulated wave calculation module 132, a first SPWM module 133, a phase-locked loop module 134, a current inner loop control module 135, an alternating-current voltage loop control module 141, a second modulated wave calculation module 142, a second SPWM module 143, a load current feedforward control module 144, a direct-current bus voltage feedforward control module 145, an alternating-current inductor 150, a direct-current capacitor 160, an alternating-current filter inductor 170, an alternating-current filter capacitor 180 and a three-phase isolation transformer 190.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic structural view of a rail vehicle auxiliary power supply apparatus according to an exemplary embodiment, including: a rectifier 110, an inverter 120, a first controller 130, a second controller 140; the rectifier 110 is used for connecting to a single-phase ac voltage power supply and converting the single-phase ac voltage into a dc voltage, wherein the rectifier 110 may be a four-quadrant rectifier or other type of rectifier; the inverter 120 is connected to the rectifier 110, and is configured to convert a dc voltage output by the rectifier 110 into a three-phase ac voltage, and to provide a power supply for load devices on the rail vehicle, such as an air conditioner, a brake air compressor, a lighting device, and a charger; the first controller 130 is connected to the rectifier 110, and is configured to stabilize the dc voltage output by the rectifier 110 at a first voltage given value, where the first controller 130 may be specifically a control chip, the first controller 130 is specifically electrically connected to the rectifier 110, and the first controller 130 controls the rectifier 110 to stabilize the output voltage thereof at the first voltage given value, where the first voltage given value may be set according to parameters of the inverter 120; the second controller 140 is connected to the inverter 120, for stabilizing the three-phase ac voltage output by the inverter 120 at a second voltage setpoint, wherein the second controller may be embodied as a control chip, the second controller 140 is embodied as an electrical connection to the inverter 120, and the second controller 140 stabilizes the output voltage of the inverter 120 at a second voltage setpoint, which may be set according to the voltage of the load device, by controlling the inverter 120.
As can be seen from the embodiment, the rectifier of the auxiliary power supply device for the railway vehicle is connected to a single-phase ac voltage source and converts the single-phase ac voltage into a dc voltage; the inverter is connected with the rectifier and converts the direct-current voltage output by the rectifier into three-phase alternating-current voltage; the first controller is connected with the rectifier to enable the direct current voltage output by the rectifier to be stabilized at a first voltage set value; and the three-phase alternating voltage output by the inverter is stabilized at a second voltage set value through the connection of the second controller and the inverter, so that the auxiliary power supply device of the railway vehicle obtains a voltage-stabilized power supply voltage, and the problem that the stability of the power supply voltage of the auxiliary power supply device of the railway vehicle is poor due to fluctuation of the voltage on the direct current side of the rectifier of the auxiliary power supply device of the railway vehicle in the prior art is solved.
Fig. 2 is a schematic structural diagram of the rectifier and the inverter of the embodiment shown in fig. 1, fig. 3 is a schematic structural diagram of the first controller of the embodiment shown in fig. 1, on the basis of the above-mentioned embodiment,
the rectifier 110 includes: four insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, abbreviated as "IGBTs") 111;
The first controller 130 includes: a dc voltage outer loop control module 131, a first modulated wave calculation module 132, a first sinusoidal pulse width modulation (Sinusoidal Pulse Width Modulation, simply "SPWM") module 133;
the rectifier 110 is provided with a first voltage sensor (not shown in the figure), and the dc voltage outer loop control module 131 is configured to receive an instantaneous value of an output voltage of the rectifier from the first voltage sensor, and calculate a first modulation amount according to a first voltage given value of the rectifier;
specifically, the direct-current voltage outer ring control module obtains output voltage of the rectifier detected by the first voltage sensor, 100Hz ripple (secondary ripple) mixed in the output voltage of the rectifier is filtered through the 2-order Butterworth trap, an instantaneous value of the output voltage of the rectifier for filtering the secondary ripple is obtained, and at the moment, the instantaneous value of the output voltage of the rectifier for filtering the secondary ripple is a smooth straight line in a coordinate system; the method comprises the steps of adjusting the difference value between the instantaneous value of the output voltage of a rectifier with secondary ripple filtered and a first voltage given value of the rectifier through PI (Proportional Integral, abbreviated as 'proportional integral') and performing amplitude limiting treatment to obtain a first modulation quantity;
The first modulated wave calculation module 132 is connected to the dc voltage outer loop control module 131, and is configured to receive the first modulation amount, perform signal modulation on the first modulation amount, and calculate a first modulated wave signal;
specifically, two direct current components of the first modulation quantity under two rotation coordinate systems are calculated to obtain a first modulation wave signal according to the two direct current components.
The first SPWM module 133 is connected to the first modulated wave calculating module 132 and the four IGBTs 111, and is configured to receive the first modulated wave signal, and calculate four paths of first PWM pulse driving signals according to the first modulated wave signal, so that the four IGBTs of the rectifier stabilize the dc voltage at the first voltage given value according to the dc voltage value output by the first PWM pulse driving signals.
As can be seen from this embodiment, the rectifier of this embodiment includes four IGBTs, and the first controller specifically includes: the direct-current voltage outer ring control module, the first modulation wave calculation module and the first SPWM module are used for obtaining a first modulation quantity through the direct-current voltage outer ring control module, the first modulation wave calculation module is connected with the direct-current voltage outer ring control module and used for receiving the first modulation quantity, and calculating to obtain a first modulation wave signal; the first SPWM module is connected with the first modulation wave calculation module and receives the first modulation wave signals to generate four paths of first PWM pulse driving signals, so that the four IGBTs of the rectifier stabilize the direct current voltage at a first voltage given value according to the direct current voltage value output by the first PWM pulse driving signals, and the rectifier is further ensured to output direct current with stable voltage.
Fig. 4 is another structural schematic diagram of the first controller of the embodiment shown in fig. 1, on the basis of the above-described embodiment,
the first controller 130 further includes: a phase-locked loop module 134, a current inner loop control module 135;
the current inner loop control module 135 is respectively connected with the direct-current voltage outer loop control module 131, the first modulated wave calculation module 132 and the phase-locked loop module 134; the phase-locked loop module 134 is also connected with the first modulated wave calculation module 132;
the rectifier 110 is provided with a second voltage sensor (not shown in the figure), and the phase-locked loop module 134 is configured to receive an instantaneous value of the input voltage of the rectifier from the second voltage sensor, and calculate an actual phase angle of the input voltage of the rectifier according to a given angular frequency of the input voltage of the rectifier;
specifically, the phase-locked loop module obtains the instantaneous value of the input voltage of the rectifier detected by the second voltage sensor, and records as U in An estimated value of the instantaneous value of the input voltage obtained by the operation of generalized second order integration (SOGI) of the instantaneous value of the input voltage of the rectifier is recorded as U α 、U β Male (Utility)The formula is as follows:
where k is the damping coefficient, taking k=0.6, ω is the actual angular frequency of the input voltage.
Estimate U of the instantaneous value of the input voltage of the rectifier α 、U β Converting the two-phase static coordinate system into a two-phase rotating coordinate system to obtain a d-axis component U under the two-phase rotating coordinate system d And q-axis component U q The coordinate transformation formula is as follows:
u is set to q After PI adjustment, the angular frequency adjustment error omega is obtained 1 Given angular frequency omega of input voltage of rectifier r ＝200π，ω 1 And omega r The sum results in the actual angular frequency omega of the input voltage, and the actual phase angle theta of the input voltage of the rectifier is obtained by accumulating and limiting omega to between 0 and 2 pi.
The rectifier 110 is provided with a first current sensor (not shown in the figure), and the current inner loop control module 135 is configured to receive an instantaneous value of an input current of the rectifier from the first current sensor, receive a first modulation amount from the dc voltage outer loop control module, receive an actual phase angle of an input voltage of the rectifier from the phase-locked loop module, and calculate a second modulation amount;
specifically, the first current sensor detects an instantaneous value of the input current of the rectifier, denoted as I in Instantaneous value I of input voltage of rectifier in An estimated value of the instantaneous value of the input voltage obtained by a generalized second order integration (SOGI) operation is denoted as I α 、I β The method comprises the steps of carrying out a first treatment on the surface of the Estimate I of the instantaneous value of the input voltage of the rectifier α 、I β Converting the two-phase static coordinate system into a two-phase rotating coordinate system to obtain a d-axis component I under the two-phase rotating coordinate system d And q-axis component I q The first modulation quantity I d_ref As a d-axis component given value in a two-phase rotating coordinate system, I q And I d_ref The difference value of the second modulation quantity is subjected to PI regulation and amplitude limiting treatment to obtain a d-axis component U of the second modulation quantity abd The method comprises the steps of carrying out a first treatment on the surface of the The given value of the q-axis component under the two-phase rotation coordinate system is 0 and is matched with I q Performing difference making, namely performing PI adjustment and amplitude limiting treatment on the difference value to obtain a d-axis component U of the second modulation quantity abd The second modulation amount is (U) abd ，U abd )。
The first modulated wave calculation module 132 is specifically configured to receive the second modulation amount from the current inner loop control module, receive the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and perform signal modulation on the second modulation amount according to the actual phase angle of the input voltage of the rectifier, so as to calculate a second modulated wave signal;
wherein, the calculation formula of the second modulated wave signal is as follows:
U ab ＝U abd sin(θ)+U abq cos(θ)
in U ab For the second modulated wave signal (sine wave), θ is the actual phase angle of the input voltage of the rectifier obtained by the phase-locked loop module.
The first SPWM module 133 is specifically configured to receive the second modulated wave signal, and calculate four paths of second PWM pulse driving signals according to the second modulated wave signal, so that the four IGBTs of the rectifier stabilize the dc voltage at the first voltage given value according to the dc voltage value output by the second PWM pulse driving signals.
As can be seen from the present embodiment, the first controller of the present embodiment further includes: the phase-locked loop module and the current inner loop control module are respectively connected with the direct-current voltage outer loop control module, the first modulation wave calculation module and the phase-locked loop module; the phase-locked loop module is further connected with the first modulation wave calculation module, the actual phase angle of the input voltage of the rectifier is calculated through the phase-locked loop module, the current inner loop control module receives the first modulation quantity according to the received instantaneous value of the input current of the rectifier, receives the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and calculates to obtain the second modulation quantity, the first modulation wave calculation module receives the second modulation quantity from the current inner loop control module, receives the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, carries out signal modulation on the second modulation quantity according to the actual phase angle of the input voltage of the rectifier, calculates to obtain a second modulation wave signal, and calculates to obtain four paths of second PWM pulse driving signals according to the second modulation wave signal, so that the four IGBTs of the rectifier stabilize the direct current voltage at a first voltage set value according to the second PWM pulse driving signal, meanwhile, the input current of the four IGBTs of the rectifier is in phase with the input voltage of the rectifier, the current of the rectifier is different from the input voltage of the rectifier, the auxiliary power of the rectifier is controlled by the auxiliary power supply device of the vehicle, and the stability of the power supply device of the vehicle is improved.
Fig. 5 is a schematic diagram of the second controller of the embodiment shown in fig. 1, on the basis of the above-described embodiment,
referring to fig. 2, the inverter 120 includes: six IGBTs 111;
referring to fig. 5, the second controller 140 includes: an alternating current voltage ring control module 141, a second modulated wave calculation module 142, a second SPWM module 143;
the inverter 120 is provided with a third voltage sensor (not shown in the figure), and the ac voltage loop control module 141 is configured to receive an instantaneous value of an output voltage of the inverter from the third voltage sensor, and calculate a third modulation amount according to a second voltage given value of the inverter;
wherein the instantaneous value of the output voltage of the inverter belongs to the line voltage.
Specifically, the ac voltage loop control module obtains the instantaneous value of the output three-phase line voltage of the inverter detected by the third voltage sensor, and records it as U uv 、U vw U is then wu ＝-(U uv +U vw ) The method comprises the steps of carrying out a first treatment on the surface of the Voltage U of three phase line uv 、U vw 、U wu Converted into three-phase voltage, denoted as U a 、U b And U c The conversion formula is as follows:
u is set to a 、U b And U c Converting the three-phase static coordinate system into a two-phase rotating coordinate system to obtain two direct current components U d_2 And U q_2 The conversion formula is as follows:
the second voltage given value U d_ref And U q_ref ，U d_ref And U d_2 Difference, U q_ref And U q_2 The difference of (2) is subjected to PI adjustment and amplitude limiting to obtain a third modulation quantity (M ud ，M uq )。
The second modulated wave calculation module 142 is connected to the ac voltage loop control module 141, and is configured to receive the third modulation amount, perform signal modulation on the third modulation amount, and calculate to obtain a third modulated wave signal;
the second SPWM module 143 is connected to the second modulated wave calculating module 142 and the six IGBTs, and is configured to receive the third modulated wave signal, and calculate to obtain six paths of third PWM pulse driving signals according to the third modulated wave signal, so that the three-phase ac voltage value output by the six IGBTs of the inverter according to the third PWM pulse driving signals is stabilized at the second voltage given value.
As can be seen from this embodiment, the inverter of this embodiment includes six IGBTs, and the second controller includes: the system comprises an alternating current voltage ring control module, a second modulation wave calculation module and a second SPWM module; the method comprises the steps that an alternating current voltage loop control module receives an instantaneous value of output voltage of an inverter, a third modulation quantity is calculated according to a second voltage given value of the inverter, a second modulation wave calculation module receives the third modulation quantity, a third modulation wave signal is calculated, a second SPWM module receives the third modulation wave signal, and six paths of third PWM pulse driving signals are calculated according to the third modulation wave signal, so that six IGBTs of the inverter are stabilized at the second voltage given value according to the three-phase alternating current voltage value output by the third PWM pulse driving signals, and stable three-phase alternating current of the output voltage of the inverter is further guaranteed.
Fig. 6 is another structural diagram of the second controller of the embodiment shown in fig. 1, on the basis of the above-described embodiment,
the second controller 140 further includes: a load current feedforward control module 144 connected to the second modulated wave calculation module 142;
the inverter is provided with a second current sensor (not shown in the figure), and the load current feedforward control module 144 is configured to receive the three-phase load current from the second current sensor and calculate a fourth modulation amount;
the load current feedforward control module obtains three-phase load currents output by the inverter and detected by the second current sensor, and records the three-phase load currents as Ia and Ib, if the load currents are ic= - (Ia+Ib), the Ia, ib and Ic are converted into a two-phase rotating coordinate system from a three-phase static coordinate system to obtain two direct current components Id and Iq, and then the Id and the Iq are multiplied by a proportional coefficient Ki respectively to obtain a fourth modulation quantity.
The second modulated wave calculation module 142 is specifically configured to receive the third modulated quantity from the ac voltage loop control module and the fourth modulated quantity from the load current feedforward control module, and perform signal modulation on the third modulated quantity and the fourth modulated quantity, and calculate a fourth modulated wave signal;
the second SPWM module 143 is specifically configured to receive the fourth modulated wave signal, and calculate to obtain six paths of fourth PWM pulse driving signals according to the fourth modulated wave signal, so that six IGBTs of the inverter stabilize the three-phase ac voltage value output by the inverter at the second voltage set value according to the third PWM pulse driving signal.
As can be seen from this embodiment, the inverter of this embodiment includes six IGBTs, and the second controller includes: the alternating current voltage loop control module, the second modulation wave calculation module, the second SPWM module and the load current feedforward control module are used for receiving an instantaneous value of the output voltage of the inverter through the alternating current voltage loop control module and calculating to obtain a third modulation quantity according to a second voltage given value of the inverter; the load current feedforward control module receives the three-phase load current from the second current sensor and calculates a fourth modulation quantity, the second modulation wave calculation module calculates a fourth modulation wave signal according to the third modulation quantity and the fourth modulation quantity, the second SPWM module receives the fourth modulation wave signal and calculates six paths of fourth PWM pulse driving signals according to the fourth modulation wave signal, so that six IGBTs of the inverter stabilize at a second voltage given value according to the three-phase alternating voltage value output by the third PWM pulse driving signals, stable three-phase alternating current output by the inverter is ensured, and fluctuation of three-phase alternating voltage output by the six IGBTs of the inverter caused when the three-phase load current changes is weakened.
Fig. 7 is another structural diagram of the second controller of the embodiment shown in fig. 1, on the basis of the above-described embodiment,
The second controller 140 further includes: a dc bus voltage feedforward control module 145 connected to the second modulated wave calculation module; the direct current bus voltage feedforward control module 145 is configured to receive an instantaneous value of the output voltage of the rectifier from the first voltage sensor, and calculate a fifth modulation amount;
specifically, the direct current bus voltage feedforward control module obtains an instantaneous value Udc of the output voltage of the rectifier received by the first voltage sensor, the instantaneous value Udc is the direct current bus voltage of the inverter, the ripple (secondary ripple) of 100HZ is inherent, the Udc is filtered by a 2-order butterworth trap to filter the secondary ripple, and then the instantaneous value of the output voltage of the rectifier filtered by the secondary ripple is multiplied by a proportionality coefficient to obtain a fifth modulation quantity.
The second modulated wave calculation module 142 is specifically configured to receive the third modulated quantity from the ac voltage loop control module, receive the fourth modulated quantity from the load current feedforward control module, receive the fifth modulated quantity from the dc bus voltage feedforward control module, and perform signal modulation on the third modulated quantity, the fourth modulated quantity, and the fifth modulated quantity, and calculate a fifth modulated wave signal;
the second SPWM module 143 is specifically configured to receive the fifth modulated wave signal, and calculate to obtain six paths of fifth PWM pulse signals according to the fifth modulated wave signal, so that the three-phase ac voltage value output by the six IGBTs of the inverter according to the fifth PWM pulse signals is stabilized at the second voltage given value.
As can be seen from this embodiment, the inverter of this embodiment includes six IGBTs, and the second controller includes: the second modulation wave calculation module receives the third modulation quantity from the alternating current voltage ring control module, receives the fourth modulation quantity from the load current feedforward control module, receives the fifth modulation quantity from the direct current bus voltage feedforward control module, and performs signal modulation on the third modulation quantity, the fourth modulation quantity and the fifth modulation quantity, calculates to obtain a fifth modulation wave signal, calculates to obtain a six-way fifth PWM pulse signal according to the fifth modulation wave signal, so that three-phase alternating voltage values output by six IGBTs of the inverter according to the fifth PWM pulse signal are stabilized at a second voltage set value, and simultaneously three-phase alternating voltage fluctuation of six IGBTs of the inverter caused when three-phase load current changes and three-phase alternating voltage fluctuation of six IGBTs caused when the output voltage of the inverter are weakened.
Alternatively, based on the above-described embodiments, referring to fig. 2,
above-mentioned rail vehicle auxiliary power supply device can also include: an alternating current inductor 150, a direct current capacitor 160, an alternating current filter inductor 170, an alternating current filter capacitor 180 and a three-phase isolation transformer 190;
the ac inductor 150 is connected to the input of the rectifier 110 and is connected to a single-phase ac voltage source; the dc capacitor 160 is connected in parallel between two dc lines at the output end of the rectifier 110, the ac filter inductor 170 is connected to the output end of the inverter 120, the ac filter capacitor 180 is connected in parallel between three ac lines at the output end of the ac filter inductor 170, and the three-phase isolation transformer 190 is connected to the output end of the ac filter inductor 170.
Fig. 8 is a flowchart illustrating a control method of a auxiliary power supply device for a rail vehicle according to an exemplary embodiment, where the auxiliary power supply device for a vehicle according to the present embodiment includes: the system comprises a rectifier, an inverter, a first controller and a second controller; the rectifier is connected with a single-phase alternating-current voltage power supply and is connected with the inverter; the first controller is connected with the rectifier, and the second controller is connected with the inverter; the embodiment comprises the following steps:
step 801: the first controller receives the direct current voltage output by the rectifier and adjusts the direct current voltage output by the rectifier according to the first voltage set value of the rectifier so as to enable the direct current voltage output by the rectifier to be stabilized at the first voltage set value.
Step 802: the second controller receives the three-phase alternating current voltage output by the inverter and adjusts the voltage of the three-phase alternating current output by the inverter according to the second voltage set value of the inverter so as to enable the three-phase alternating current voltage output by the inverter to be stabilized at the second voltage set value.
According to the control method of the auxiliary power supply device for the railway vehicle, disclosed by the embodiment of the invention, the first controller is used for receiving the direct-current voltage output by the rectifier and adjusting the direct-current voltage output by the rectifier according to the first voltage set value of the rectifier so as to enable the direct-current voltage output by the rectifier to be stabilized at the first voltage set value; and the second controller receives the three-phase alternating current voltage output by the inverter, and adjusts the voltage of the three-phase alternating current output by the inverter according to the second voltage set value of the inverter, so that the three-phase alternating current voltage output by the inverter is stabilized at the second voltage set value, and the problem that the stability of the power supply voltage of the auxiliary power supply device of the railway vehicle is poor due to the fact that the voltage of the direct current side of the rectifier of the auxiliary power supply device of the railway vehicle fluctuates in the prior art is solved.
Fig. 9 is a flowchart of a control method of an auxiliary power supply device for a rail vehicle according to another exemplary embodiment, where the control method includes:
The rectifier comprises four IGBTs; a first controller, comprising: the device comprises a direct-current voltage outer ring control module, a phase-locked loop module, a current inner ring control module, a first modulated wave calculation module and a first SPWM module; the direct-current voltage outer ring control module is connected with the current inner ring control module, the current inner ring control module is connected with the first modulation wave calculation module, the first modulation wave calculation module is connected with the first SPWM module, and the phase-locked loop module is respectively connected with the current inner ring control module and the first modulation wave calculation module;
the inverter comprises six IGBTs; a second controller, comprising: the system comprises an alternating current voltage loop control module, a load current feedforward control module, a direct current bus voltage feedforward control module, a second modulation wave calculation module and a second SPWM module; the second modulation wave calculation module is respectively connected with the alternating current voltage loop control module, the load current feedforward control module, the direct current bus voltage feedforward control module and the second SPWM module;
the method comprises the following steps:
step 901: the direct-current voltage outer ring control module receives an instantaneous value of the output voltage of the rectifier from a first voltage sensor arranged on the rectifier, and calculates a first modulation amount according to a first voltage given value of the rectifier;
Step 902: the phase-locked loop module receives an instantaneous value of the input voltage of the rectifier from a second voltage sensor arranged on the rectifier, and calculates an actual phase angle of the input voltage of the rectifier according to a given angular frequency of the input voltage of the rectifier;
step 903: the current inner loop control module receives an instantaneous value of the input current of the rectifier from a first current sensor arranged on the rectifier, receives a first modulation amount from the direct-current voltage outer loop control module, receives an actual phase angle of the input voltage of the rectifier from the first current sensor, and calculates a second modulation amount;
step 904: the first modulation wave calculation module receives a second modulation amount from the current inner loop control module, receives an actual phase angle of the input voltage of the rectifier from the phase-locked loop module, carries out signal modulation on the second modulation amount according to the actual phase angle of the input voltage of the rectifier, and calculates to obtain a second modulation wave signal;
step 905: the first SPWM module receives the second modulated wave signal and calculates four paths of second PWM pulse driving signals according to the second modulated wave signal;
step 906: four IGBTs of the rectifier receive the second PWM pulse driving signal and output direct-current voltage with the voltage value stabilized at the given value of the first voltage according to the second PWM pulse driving signal.
Step 907: the alternating current voltage loop control module receives an instantaneous value of the output voltage of the inverter from a third voltage sensor arranged on the inverter, and calculates a third modulation amount according to a second voltage given value of the inverter;
step 908: the load current feedforward control module receives three-phase load current from a second current sensor arranged on the inverter and calculates a fourth modulation amount;
step 909: the direct current bus voltage feedforward control module receives an instantaneous value of the output voltage of the rectifier from a first voltage sensor arranged on the rectifier, and calculates a fifth modulation amount;
step 910: the second modulation wave calculation module receives the third modulation quantity, the fourth modulation quantity and the fifth modulation quantity, carries out signal modulation on the third modulation quantity, the fourth modulation quantity and the fifth modulation quantity, and calculates to obtain a fifth modulation wave signal;
step 911: the second SPWM module receives the fifth modulated wave signal and calculates six paths of PWM pulse signals according to the fifth modulated wave signal;
step 912: six IGBTs of the inverter receive the fifth PWM pulse driving signal and output three-phase alternating current voltage with the voltage value stabilized at the given value of the second voltage according to the fifth PWM pulse driving signal.
According to the embodiment, the actual phase angle of the input voltage of the rectifier is obtained through calculation of the phase-locked loop module, the current inner loop control module receives the first modulation amount from the direct current voltage outer loop control module according to the received instantaneous value of the input voltage of the rectifier, receives the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and obtains the second modulation amount through calculation, the first modulation wave calculation module receives the second modulation amount from the current inner loop control module, receives the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, carries out signal modulation on the second modulation amount according to the actual phase angle of the input voltage of the rectifier, calculates to obtain the second modulation wave signal, and calculates to obtain the four paths of second PWM pulse driving signals according to the second modulation wave signal, so that the four IGBTs of the rectifier stabilize the direct current voltage output by the first voltage set value according to the second PWM pulse driving signal, and meanwhile, the input current of the four IGBTs of the rectifier is in phase with the input voltage of the rectifier, but the auxiliary power supply device of the rail vehicle has improved stability of the power supply voltage of the auxiliary power supply device of the rail vehicle, and the power supply device of the rail vehicle is prevented from being poor in power supply stability. Meanwhile, the direct current bus voltage feedforward control module receives the instantaneous value of the output voltage of the rectifier from the first voltage sensor and calculates a fifth modulation amount, the second modulation wave calculation module receives the third modulation amount from the alternating current voltage ring control module, receives the fourth modulation amount from the load current feedforward control module, receives the fifth modulation amount from the direct current bus voltage feedforward control module, carries out signal modulation on the third modulation amount, the fourth modulation amount and the fifth modulation amount, calculates a fifth modulation wave signal, the second SPWM module receives the fifth modulation wave signal, calculates a sixth path of fifth PWM pulse signal according to the fifth modulation wave signal, so that three-phase alternating voltage values output by six IGBTs of the inverter according to the fifth PWM pulse signal are stabilized at a second voltage set value, and fluctuation of three-phase alternating voltage output by six IGBTs of the inverter caused when three-phase load current changes and fluctuation of three-phase alternating voltage output by six IGBTs of the inverter caused when the output voltage of the rectifier fluctuates can be weakened.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (6)

1. An auxiliary power supply device for a railway vehicle, comprising: the system comprises a rectifier, an inverter, a first controller and a second controller;
the rectifier is used for being connected with a single-phase alternating voltage power supply and converting the single-phase alternating voltage into direct voltage;
The inverter is connected with the rectifier and is used for converting the direct-current voltage output by the rectifier into three-phase alternating-current voltage;
the first controller is connected with the rectifier and is used for stabilizing the direct current voltage output by the rectifier at a first voltage given value;
the second controller is connected with the inverter and is used for stabilizing the three-phase alternating voltage output by the inverter at a second voltage set value;
the inverter comprises six IGBTs; the second controller includes: the system comprises an alternating current voltage loop control module, a second modulation wave calculation module, a second SPWM module, a load current feedforward control module connected with the second modulation wave calculation module and a direct current bus voltage feedforward control module connected with the second modulation wave calculation module;
the inverter is provided with a third voltage sensor, and the alternating current voltage ring control module is used for controlling the third voltageThe sensor receives the instantaneous value of the output three-phase line voltage of the inverter, converts the instantaneous value of the output three-phase line voltage into three-phase voltage, and converts the three-phase voltage into a two-phase rotating coordinate system to obtain two direct current components U d_2 And U q_2 The second voltage is given a value U d_ref And U d_2 Is the difference of the second voltage set value U q_ref And U q_2 The difference of (2) is subjected to PI adjustment and amplitude limiting to obtain a third modulation quantity (M ud ，M uq )；
The inverter is provided with a second current sensor, the load current feedforward control module is used for receiving three-phase load current from the second current sensor, converting the three-phase load current from a three-phase static coordinate system to a two-phase rotating coordinate system to obtain two direct current components Id and Iq, and multiplying Id and Iq by a proportional coefficient Ki respectively to obtain a fourth modulation quantity;
the direct current bus voltage feedforward control module is used for receiving the instantaneous value of the output voltage of the rectifier from the first voltage sensor, filtering the instantaneous value of the output voltage of the rectifier through a 2-order Butterworth trap to remove secondary ripple, and multiplying the instantaneous value of the output voltage of the rectifier with the secondary ripple removed by a proportionality coefficient to obtain a fifth modulation quantity;
the second modulation wave calculation module is specifically configured to receive the third modulation amount from the ac voltage loop control module, receive the fourth modulation amount from the load current feedforward control module, receive the fifth modulation amount from the dc bus voltage feedforward control module, and perform signal modulation on the third modulation amount, the fourth modulation amount, and the fifth modulation amount, to calculate a fifth modulation wave signal;
The second SPWM module is specifically configured to receive the fifth modulated wave signal, and calculate, according to the fifth modulated wave signal, six paths of fifth PWM pulse signals, so that six IGBTs of the inverter stabilize, according to the third phase ac voltage value output by the fifth PWM pulse signal, at the second voltage given value.
2. The auxiliary power unit for a rail vehicle according to claim 1, wherein the rectifier comprises four insulated gate bipolar transistors IGBTs;
the first controller includes: the direct-current voltage outer ring control module, the first modulated wave calculation module and the first Sinusoidal Pulse Width Modulation (SPWM) module;
the rectifier is provided with a first voltage sensor, and the direct-current voltage outer ring control module is used for receiving an instantaneous value of the output voltage of the rectifier from the first voltage sensor and calculating to obtain a first modulation quantity according to the first voltage given value of the rectifier;
the first modulation wave calculation module is connected with the direct-current voltage outer ring control module and is used for receiving the first modulation quantity, carrying out signal modulation on the first modulation quantity and calculating to obtain a first modulation wave signal;
The first SPWM module is respectively connected with the first modulation wave calculation module and the four IGBTs and is used for receiving the first modulation wave signals and calculating four paths of first PWM pulse driving signals according to the first modulation wave signals so that the four IGBTs of the rectifier stabilize the direct current voltage at the given value of the first voltage according to the direct current voltage value output by the first PWM pulse driving signals.
3. The rail vehicle auxiliary power unit of claim 2, wherein the first controller further comprises: the phase-locked loop module and the current inner loop control module;
the current inner loop control module is respectively connected with the direct-current voltage outer loop control module, the first modulation wave calculation module and the phase-locked loop module; the phase-locked loop module is also connected with the first modulated wave calculation module;
the phase-locked loop module is used for receiving an instantaneous value of the input voltage of the rectifier from the second voltage sensor and calculating an actual phase angle of the input voltage of the rectifier according to a given angular frequency of the input voltage of the rectifier;
The rectifier is provided with a first current sensor, the current inner loop control module is used for receiving an instantaneous value of input current of the rectifier from the first current sensor, receiving the first modulation quantity from the direct-current voltage outer loop control module, receiving an actual phase angle of input voltage of the rectifier from the phase-locked loop module and calculating to obtain a second modulation quantity;
the first modulation wave calculation module is specifically configured to receive the second modulation amount from the current inner loop control module, receive an actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and perform signal modulation on the second modulation amount according to the actual phase angle of the input voltage of the rectifier, so as to calculate a second modulation wave signal;
the first SPWM module is specifically configured to receive the second modulated wave signal, and calculate four paths of second PWM pulse driving signals according to the second modulated wave signal, so that the four IGBTs of the rectifier stabilize the DC voltage at the first voltage given value according to the DC voltage value output by the second PWM pulse driving signals.
4. A rail vehicle auxiliary power unit according to any one of claims 1-3, further comprising: alternating current inductance, direct current capacitance, alternating current filter inductance, alternating current filter capacitance and three-phase isolation transformer;
The alternating current inductor is connected with the input end of the rectifier and is connected with the single-phase alternating current voltage power supply; the DC capacitor is connected in parallel between two DC lines of the output end of the rectifier, the AC filter inductor is connected with the output end of the inverter, the AC filter capacitor is connected in parallel between three AC lines of the output end of the AC filter inductor, and the three-phase isolation transformer is connected with the output end of the AC filter inductor.
5. A method of controlling a rail vehicle auxiliary power unit, the vehicle auxiliary power unit comprising: the system comprises a rectifier, an inverter, a first controller and a second controller; the inverter comprises six IGBTs;
the rectifier is connected with a single-phase alternating-current voltage power supply and is connected with the inverter; the first controller is connected with the rectifier, and the second controller is connected with the inverter;
the method comprises the following steps:
the first controller receives the direct current voltage output by the rectifier and adjusts the direct current voltage output by the rectifier according to a first voltage given value of the rectifier so as to enable the direct current voltage output by the rectifier to be stabilized at the first voltage given value;
The second controller receives the three-phase alternating current voltage output by the inverter and adjusts the voltage of the three-phase alternating current output by the inverter according to a second voltage set value of the inverter so as to enable the three-phase alternating current voltage output by the inverter to be stabilized at the second voltage set value;
wherein the second controller includes: the system comprises an alternating current voltage loop control module, a second modulation wave calculation module, a second SPWM module, a load current feedforward control module connected with the second modulation wave calculation module and a direct current bus voltage feedforward control module connected with the second modulation wave calculation module;
the alternating current voltage ring control module receives an instantaneous value of an output three-phase line voltage of the inverter from a third voltage sensor arranged on the inverter, converts the instantaneous value of the output three-phase line voltage into a three-phase voltage, converts the three-phase voltage into a two-phase rotation coordinate system, and obtains two direct current components U d_2 And U q_2 The second voltage is given a value U d_ref And U d_2 Is the difference of the second voltage set value U q_ref And U q_2 The difference of (2) is subjected to PI adjustment and amplitude limiting to obtain a third modulation quantity (M ud ，M uq )；
The load current feedforward control module receives three-phase load current from a second current sensor arranged on the inverter, converts the three-phase load current from a three-phase static coordinate system to a two-phase rotating coordinate system to obtain two direct current components Id and Iq, and then multiplies Id and Iq by a proportional coefficient Ki to obtain a fourth modulation quantity;
The direct current bus voltage feedforward control module receives an instantaneous value of the output voltage of the rectifier from a first voltage sensor arranged on the inverter, filters secondary ripples of the instantaneous value of the output voltage of the rectifier through a 2-order Butterworth trap, and multiplies the instantaneous value of the output voltage of the rectifier with the secondary ripples filtered by a proportionality coefficient to obtain a fifth modulation quantity;
the second modulation wave calculation module receives the third modulation quantity from the alternating current voltage ring control module, receives the fourth modulation quantity from the load current feedforward control module, receives the fifth modulation quantity from the direct current bus voltage feedforward control module, and carries out signal modulation on the third modulation quantity, the fourth modulation quantity and the fifth modulation quantity, so as to calculate a fifth modulation wave signal;
the second SPWM module receives the fifth modulated wave signal, and calculates six paths of fifth PWM pulse signals according to the fifth modulated wave signal, so that six IGBTs of the inverter stabilize the three-phase alternating voltage value output by the fifth PWM pulse signals at the second voltage set value.
6. The method of claim 5, wherein the rectifier comprises four IGBTs; the first controller includes: the device comprises a direct-current voltage outer ring control module, a phase-locked loop module, a current inner ring control module, a first modulated wave calculation module and a first SPWM module; the direct-current voltage outer loop control module is connected with the current inner loop control module, the current inner loop control module is connected with the first modulation wave calculation module, the first modulation wave calculation module is connected with the first SPWM module, and the phase-locked loop module is respectively connected with the current inner loop control module and the first modulation wave calculation module;
The method comprises the following steps:
the direct-current voltage outer ring control module receives an instantaneous value of the output voltage of the rectifier from a first voltage sensor arranged on the rectifier, and calculates a first modulation amount according to the first voltage given value of the rectifier;
the phase-locked loop module receives an instantaneous value of the input voltage of the rectifier from a second voltage sensor arranged on the rectifier, and calculates an actual phase angle of the input voltage of the rectifier according to a given angular frequency of the input voltage of the rectifier;
the current inner loop control module receives an instantaneous value of the input current of the rectifier from a first current sensor arranged on the rectifier, receives the first modulation amount from the direct-current voltage outer loop control module, receives an actual phase angle of the input voltage of the rectifier from the first current sensor, and calculates a second modulation amount;
the first modulation wave calculation module receives the second modulation quantity from the current inner loop control module, receives the actual phase angle of the input voltage of the rectifier from the phase-locked loop module, and carries out signal modulation on the second modulation quantity according to the actual phase angle of the input voltage of the rectifier, so as to calculate a second modulation wave signal;
The first SPWM module receives the second modulated wave signal and calculates four paths of second PWM pulse driving signals according to the second modulated wave signal;
and four IGBTs of the rectifier receive the second PWM pulse driving signal and output direct-current voltage with the voltage value stabilized at the given value of the first voltage according to the second PWM pulse driving signal.
CN201710020051.4A 2017-01-11 2017-01-11 Auxiliary power supply device for railway vehicle and control method thereof Active CN106541829B (en)

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CN111181412A (en) * 2018-11-13 2020-05-19 上海三菱电梯有限公司 Elevator frequency conversion device and escalator

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JP2013038844A (en) * 2011-08-04 2013-02-21 Daihen Corp System interconnection inverter device
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