Ultra-high-speed electromagnetic drive power supply system and control method based on power flow converter

Abstract

The present invention belongs to the field of electromagnetic drive power supply technology, and specifically relates to an ultra-high-speed electromagnetic drive power supply system and control method based on a power flow converter, which aims to solve the problems of high switching frequency, weak current carrying capacity, and large output current harmonics of the converter powered by the existing electromagnetic drive system. The present invention includes: an energy storage device connected to the primary side of the input transformer to provide energy for the system; m input transformer secondary windings of the input transformer are respectively connected to the input ends of m current source converters; m output transformer secondary windings of the output transformer are respectively connected to the output ends of m current source converters; the output transformer primary is connected to the load for supplying power to the load. The switching frequency of the power semiconductor device on the rectifier side of the present invention is equal to the input transformer voltage frequency, and the switching frequency of the power semiconductor device on the inverter side is equal to the reference current frequency. The switching frequency is low, the current carrying capacity is strong, and the current harmonic content is small.

Description

Background Art

[0002] As the world's technological competition becomes increasingly fierce, the operating speed of ground transportation equipment is developing in an increasingly faster direction. The research and development of high-speed and ultra-high-speed ground transportation technology requires the completion of continuous dynamic process aerodynamic characteristics tests, high-speed stability tests of vehicles, and asymmetric flow process characteristics tests such as meeting vehicles and passing through tunnels. The implementation of these tests is heavily dependent on ultra-high-speed ground test facilities.

[0003] The existing test facilities suitable for high-speed ground transportation research and development mainly include wind tunnels and dynamic model test devices: wind tunnels are mainly used to test the steady-state aerodynamic characteristics of trains, and it is difficult to complete the simulation of dynamic process aerodynamic characteristics and test asymmetric flow processes such as meeting other trains and passing through tunnels; although the dynamic model test device can simulate the high dynamics of trains and processes such as meeting other trains and passing through tunnels, its control accuracy is low and it is difficult to meet the future testing needs of high-speed trains with a speed of 1,000 kilometers per hour.

[0004] To this end, some scholars have proposed using electromagnetic force as the driving force, using linear motors to carry the test object to move at high speed according to the preset acceleration and speed curve to complete various types of steady-state and dynamic tests on the ground ultra-high-speed test facilities. In order to make the test object reach the specified operating speed as soon as possible, the acceleration should be increased as much as possible, the linear motor distance should be shortened, and the system cost should be reduced under the premise of meeting the requirements of the test object. This requires the electromagnetic drive system to provide sufficiently large power, with a voltage of up to 10kV and a current of up to 10kA. However, the voltage and current nominal values ​​of existing power semiconductor devices are difficult to meet the requirements, and when applied, they can only be connected in parallel with multiple devices and in series with multiple power modules. In addition, various steady-state and dynamic tests have high requirements for the control accuracy of parameters such as speed and acceleration, which requires the ultra-high-speed electromagnetic drive system to have high output voltage and current waveform quality and low harmonic content.

[0005] To solve the above problems, relevant literatures have proposed converter circuit topologies suitable for powering electromagnetic drive systems: "Power Decoupling Control for Capacitance Reduction in Cascaded-H-Bridge-Converter-Based Regenerative Motor Drive Systems" in "IEEE Transactions on Power Electronics" Vol. 34, No. 1, 2019 proposed the use of cascaded H-bridge voltage source converter as the converter of the electromagnetic drive system. However, when the output voltage and current reach 10kV and 10kA, multiple power semiconductor devices need to be connected in parallel, which is costly. In addition, in order to reduce the output voltage harmonics, the switching frequency of the power semiconductor device needs to be increased, which results in large losses and thus reduces the current carrying capacity of the device; "Modulation Schemes for Medium-Voltage PWM Current Source Converter-Based Drives An" in "IEEE Journal of Emerging and Selected Topics in Power Electronics" Vol. 7, No. 2, 2019 proposed the use of cascaded H-bridge voltage source converter as the converter of the electromagnetic drive system. Overview》 proposed the use of a two-level current source converter to directly drive the motor, but its output current harmonics are large and it is difficult to meet the control requirements of ultra-high-speed electromagnetic drive systems. Summary of the invention

[0006] In order to solve the above problems in the prior art, namely, the problems that the converter powered by the existing electromagnetic drive system has high switching frequency, weak current capacity, and large output current harmonics, the present invention provides an ultra-high-speed electromagnetic drive power supply system based on a power flow converter, and the ultra-high-speed electromagnetic drive power supply system includes the following modules:

[0007] The energy storage device is connected to the primary connection terminals A1, B1 and C1 of the input transformer to provide energy for the ultra-high-speed electromagnetic drive power supply system;

[0008] The secondary side of the input transformer and the secondary side of the output transformer respectively include m input transformer secondary windings and m output transformer secondary windings, wherein the phase of the three-phase voltage of the ith input transformer secondary winding lags behind the primary three-phase voltage of the input transformer by (60(i-1) / m)°, and the phase of the three-phase voltage of the ith output transformer secondary winding lags behind the primary three-phase voltage of the output transformer by (60(i-1) / m)°, 1≤i≤m, m is a positive integer and 60 is divisible by m;

[0009] The input of the i-th current source converter among the m current source converters and the secondary winding of the i-th input transformer are connected to the terminals ui, vi and wi respectively, and the output of the i-th current source converter among the m current source converters and the secondary winding of the i-th output transformer are connected to the terminals ai, bi and ci respectively;

[0010] The primary connection terminals A2, B2 and C2 of the output transformer are connected to the load for supplying power to the load.

[0011] In some preferred embodiments, the i-th current source converter includes an i-th rectifier side, an i-th inverter side and a filter inductor L idc ;

[0012] The i-th rectifier side includes an input side filter C fi1 , power semiconductor switch Ti1, power semiconductor switch Ti2, power semiconductor switch Ti3, power semiconductor switch Ti4, power semiconductor switch Ti5 and power semiconductor switch Ti6;

[0013] The i-th inverter side includes an output side filter C fi2 , power semiconductor switch Si1, power semiconductor switch Si2, power semiconductor switch Si3, power semiconductor switch Si4, power semiconductor switch Si5 and power semiconductor switch Si6.

[0014] In some preferred embodiments, the module connection relationship of the i-th rectifier side is:

[0015] Input filter C fi1 Connect to terminals ui, vi and wi respectively;

[0016] The cathode of the power semiconductor switch Ti1, the cathode of the power semiconductor switch Ti3 and the cathode of the power semiconductor switch Ti5 are connected to the filter inductor L idc a first connection end;

[0017] The anode of the power semiconductor switch Ti1 and the cathode of the power semiconductor switch Ti4 are connected to the terminal ui, the anode of the power semiconductor switch Ti3 and the cathode of the power semiconductor switch Ti6 are connected to the terminal vi, and the anode of the power semiconductor switch Ti5 and the cathode of the power semiconductor switch Ti2 are connected to the terminal wi;

[0018] The anode of the power semiconductor switch Ti4 , the anode of the power semiconductor switch Ti6 , and the anode of the power semiconductor switch Ti2 are connected together.

[0019] In some preferred embodiments, the module connection relationship of the i-th inverter side is:

[0020] Output filter C fi2Connect to terminals ai, bi and ci respectively;

[0021] The anode of the power semiconductor switch Si1, the anode of the power semiconductor switch Si3 and the anode of the power semiconductor switch Si5 are connected to the filter inductor L idc a second connection end;

[0022] The cathode of the power semiconductor switch Si1 and the anode of the power semiconductor switch Si4 are connected to the terminal ai, the cathode of the power semiconductor switch Si3 and the anode of the power semiconductor switch Si6 are connected to the terminal bi, and the cathode of the power semiconductor switch Si5 and the anode of the power semiconductor switch Si2 are connected to the terminal ci;

[0023] The cathode of the power semiconductor switch Si4, the cathode of the power semiconductor switch Si6 and the cathode of the power semiconductor switch Si2 are connected together, and are connected together with the anode of the power semiconductor switch Ti4, the anode of the power semiconductor switch Ti6 and the anode of the power semiconductor switch Ti2.

[0024] In some preferred embodiments, the input side filter C fi1 It includes three filter capacitors connected in a star manner to the terminals ui, vi and wi.

[0025] In some preferred embodiments, the output side filter C fi2 It includes three filter capacitors connected in a star pattern to terminals ai, bi and ci.

[0026] In some preferred embodiments, in the ultra-high-speed electromagnetic drive power supply system, the three-phase voltage phases of the ith secondary winding of the input transformer and the ith secondary winding of the corresponding output transformer are the same.

[0027] Another aspect of the present invention provides a control method for an ultra-high-speed electromagnetic drive power supply system based on a power flow converter. Based on the ultra-high-speed electromagnetic drive power supply system based on a power flow converter, the method includes:

[0028] Step S10: If the ultra-high-speed electromagnetic drive power supply system is connected to the secondary winding line voltage U uwi If the zero-crossing point is the phase starting reference point, then jump to step S20; if the ultra-high-speed electromagnetic drive power supply system uses the phase of the A2 phase current reference value Ia issued by the inverter side controller as the phase starting reference point when the phase is zero, then jump to step S30;

[0029] Step S20, determine the range of the commutation angle θ sent by the rectifier-side controller and execute:

[0030] If the line voltage U uwiWhen the phase is θ~θ+60°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned on, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned on;

[0031] If the line voltage U uwi When the phase is θ+60°~θ+120°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned on, the power semiconductor switch Ti2 is turned on, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off;

[0032] If the line voltage U uwi When the phase is θ+120°~θ+180°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned on, the power semiconductor switch Ti3 is turned on, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off;

[0033] If the line voltage U uwi When the phase is θ+180°~θ+240°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned on, the power semiconductor switch Ti4 is turned on, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off;

[0034] If the line voltage U uwi When the phase is θ+240°~θ+300°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned on, the power semiconductor switch Ti5 is turned on, and the power semiconductor switch Ti6 is turned off;

[0035] If the line voltage U uwi When the phase is θ+300°~θ+360°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned on, and the power semiconductor switch Ti6 is turned on;

[0036] Step S30, determine the range of the A-phase current reference value Ia sent by the inverter-side controller and execute:

[0037] If the phase of Ia is 30°+60(i-1) / m°~90°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned on, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned on;

[0038] If the phase of Ia is 90°+60(i-1) / m°~150°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned on, the power semiconductor switch Si2 is turned on, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off;

[0039] If the phase of Ia is 150°+60(i-1) / m°~210°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned on, the power semiconductor switch Si3 is turned on, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off;

[0040] If the phase of Ia is 210°+60(i-1) / m°~270°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned on, the power semiconductor switch Si4 is turned on, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off;

[0041] If the phase of Ia is 270°+60(i-1) / m°~330°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned on, the power semiconductor switch Si5 is turned on, and the power semiconductor switch Si6 is turned off;

[0042] If the phase of Ia is 330°+60(i-1) / m°~360°+60(i-1) / m° or 60(i-1) / m°~30°+60(i-1) / m°, if the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned on, and the power semiconductor switch Si6 is turned on.

[0043] In a third aspect of the present invention, a control device for an ultra-high-speed electromagnetic drive power supply system based on a power flow converter is provided, comprising:

[0044] at least one processor; and

[0045] a memory communicatively connected to at least one of the processors; wherein,

[0046] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement the control method of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter.

[0047] In a fourth aspect of the present invention, a computer-readable storage medium is proposed, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement the above-mentioned control method of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter.

[0048] Beneficial effects of the present invention:

[0049] The present invention is based on an ultra-high-speed electromagnetic drive power supply system of a power flow converter. The switching frequency of the power semiconductor device on the rectifier side is equal to the input transformer voltage frequency, and the switching frequency of the power semiconductor device on the inverter side is equal to the reference current frequency. It has the advantages of low switching frequency, strong current-carrying capacity, low current harmonic content and high control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0051] Figure 1 It is a circuit topology diagram of an embodiment of an ultra-high-speed electromagnetic drive power supply system based on a power flow converter of the present invention. DETAILED DESCRIPTION

[0052] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0053] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] The present invention provides an ultra-high-speed electromagnetic drive power supply system based on a power flow converter, and the ultra-high-speed electromagnetic drive power supply system includes the following modules:

[0055] The energy storage device is connected to the primary connection terminals A1, B1 and C1 of the input transformer to provide energy for the ultra-high-speed electromagnetic drive power supply system;

[0056] The secondary side of the input transformer and the secondary side of the output transformer respectively include m input transformer secondary windings and m output transformer secondary windings, wherein the phase of the three-phase voltage of the ith input transformer secondary winding lags behind the primary three-phase voltage of the input transformer by (60(i-1) / m)°, and the phase of the three-phase voltage of the ith output transformer secondary winding lags behind the primary three-phase voltage of the output transformer by (60(i-1) / m)°, 1≤i≤m, m is a positive integer and 60 is divisible by m;

[0057] The input of the i-th current source converter among the m current source converters and the secondary winding of the i-th input transformer are connected to the terminals ui, vi and wi respectively, and the output of the i-th current source converter among the m current source converters and the secondary winding of the i-th output transformer are connected to the terminals ai, bi and ci respectively;

[0058] The primary connection terminals A2, B2 and C2 of the output transformer are connected to the load for supplying power to the load.

[0059] In order to more clearly explain the ultra-high-speed electromagnetic drive power supply system based on the power flow converter of the present invention, Figure 1 Each module in the embodiment of the present invention is described in detail.

[0060] The ultra-high-speed electromagnetic drive power supply system based on the power source flow converter of the first embodiment of the present invention includes an energy storage device, an input transformer, m current source converters and an output transformer. Each module is described in detail as follows:

[0061] The energy storage device is connected to the primary connection terminals A1, B1 and C1 of the input transformer to provide energy for the ultra-high-speed electromagnetic drive power supply system.

[0062] The secondary side of the input transformer and the secondary side of the output transformer include m input transformer secondary windings and m output transformer secondary windings respectively, wherein the three-phase voltage phase of the i-th input transformer secondary winding lags behind the three-phase voltage of the input transformer primary winding by (60(i-1) / m)°, and the three-phase voltage phase of the i-th output transformer secondary winding lags behind the three-phase voltage of the output transformer primary winding by (60(i-1) / m)°, 1≤i≤m, m is a positive integer and 60 is divisible by m.

[0063] The input of the i-th current source converter among the m current source converters and the secondary winding of the i-th input transformer are connected to terminals ui, vi and wi respectively, and the output of the i-th current source converter among the m current source converters and the secondary winding of the i-th output transformer are connected to terminals ai, bi and ci respectively.

[0064] The i-th current source converter includes an i-th rectifier side, an i-th inverter side and a filter inductor L idc:

[0065] The i-th rectifier side includes an input side filter C fi1 , power semiconductor switch Ti1, power semiconductor switch Ti2, power semiconductor switch Ti3, power semiconductor switch Ti4, power semiconductor switch Ti5 and power semiconductor switch Ti6.

[0066] On the ith rectifier side, the module connection relationship is:

[0067] Input filter C fi1 Connect to terminals ui, vi and wi respectively;

[0068] The cathode of the power semiconductor switch Ti1, the cathode of the power semiconductor switch Ti3 and the cathode of the power semiconductor switch Ti5 are connected to the filter inductor L idc a first connection end;

[0069] The anode of the power semiconductor switch Ti1 and the cathode of the power semiconductor switch Ti4 are connected to the terminal ui, the anode of the power semiconductor switch Ti3 and the cathode of the power semiconductor switch Ti6 are connected to the terminal vi, and the anode of the power semiconductor switch Ti5 and the cathode of the power semiconductor switch Ti2 are connected to the terminal wi;

[0070] The anode of the power semiconductor switch Ti4 , the anode of the power semiconductor switch Ti6 , and the anode of the power semiconductor switch Ti2 are connected together.

[0071] Input filter C fi1 It includes three filter capacitors connected in a star manner to the terminals ui, vi and wi.

[0072] The i-th inverter side includes an output side filter C fi2 , power semiconductor switch Si1, power semiconductor switch Si2, power semiconductor switch Si3, power semiconductor switch Si4, power semiconductor switch Si5 and power semiconductor switch Si6.

[0073] On the i-th inverter side, the module connection relationship is:

[0074] Output filter C fi2 Connect to terminals ai, bi and ci respectively;

[0075] The anode of the power semiconductor switch Si1, the anode of the power semiconductor switch Si3 and the anode of the power semiconductor switch Si5 are connected to the filter inductor L idc a second connection end;

[0076] The cathode of the power semiconductor switch Si1 and the anode of the power semiconductor switch Si4 are connected to the terminal ai, the cathode of the power semiconductor switch Si3 and the anode of the power semiconductor switch Si6 are connected to the terminal bi, and the cathode of the power semiconductor switch Si5 and the anode of the power semiconductor switch Si2 are connected to the terminal ci;

[0077] The cathode of the power semiconductor switch Si4, the cathode of the power semiconductor switch Si6 and the cathode of the power semiconductor switch Si2 are connected together, and are connected together with the anode of the power semiconductor switch Ti4, the anode of the power semiconductor switch Ti6 and the anode of the power semiconductor switch Ti2.

[0078] The primary connection terminals A2, B2 and C2 of the output transformer are connected to the load for supplying power to the load.

[0079] Output filter C fi2 It includes three filter capacitors connected in a star pattern to terminals ai, bi and ci.

[0080] In the ultra-high-speed electromagnetic drive power supply system, the three-phase voltage phases of the ith winding on the secondary side of the input transformer and the ith winding on the secondary side of the corresponding output transformer are the same.

[0081] A control method for an ultra-high-speed electromagnetic drive power supply system based on a power flow converter according to a second embodiment of the present invention is based on the ultra-high-speed electromagnetic drive power supply system based on a power flow converter described above, and the method comprises:

[0082] Step S10: If the ultra-high-speed electromagnetic drive power supply system is connected to the secondary winding line voltage U uwi If the zero-crossing point is the phase starting reference point, then jump to step S20; if the ultra-high-speed electromagnetic drive power supply system uses the phase of the A2 phase current reference value Ia issued by the inverter side controller as the phase starting reference point when the phase is zero, then jump to step S30;

[0083] Step S20, determine the range of the commutation angle θ sent by the rectifier-side controller and execute:

[0084] If the line voltage U uwi When the phase is θ~θ+60°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned on, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned on;

[0085] If the line voltage U uwiWhen the phase is θ+60°~θ+120°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned on, the power semiconductor switch Ti2 is turned on, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off;

[0086] If the line voltage U uwi When the phase is θ+120°~θ+180°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned on, the power semiconductor switch Ti3 is turned on, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off;

[0087] If the line voltage U uwi When the phase is θ+180°~θ+240°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned on, the power semiconductor switch Ti4 is turned on, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off;

[0088] If the line voltage U uwi When the phase is θ+240°~θ+300°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned on, the power semiconductor switch Ti5 is turned on, and the power semiconductor switch Ti6 is turned off;

[0089] If the line voltage U uwi When the phase is θ+300°~θ+360°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned on, and the power semiconductor switch Ti6 is turned on;

[0090] Step S30, determine the range of the A-phase current reference value Ia sent by the inverter-side controller and execute:

[0091] If the phase of Ia is 30°+60(i-1) / m°~90°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned on, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned on;

[0092] If the phase of Ia is 90°+60(i-1) / m°~150°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned on, the power semiconductor switch Si2 is turned on, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off;

[0093] If the phase of Ia is 150°+60(i-1) / m°~210°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned on, the power semiconductor switch Si3 is turned on, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off;

[0094] If the phase of Ia is 210°+60(i-1) / m°~270°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned on, the power semiconductor switch Si4 is turned on, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off;

[0095] If the phase of Ia is 270°+60(i-1) / m°~330°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned on, the power semiconductor switch Si5 is turned on, and the power semiconductor switch Si6 is turned off;

[0096] If the phase of Ia is 330°+60(i-1) / m°~360°+60(i-1) / m° or 60(i-1) / m°~30°+60(i-1) / m°, if the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned on, and the power semiconductor switch Si6 is turned on.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the method described above can refer to the corresponding process in the aforementioned system embodiment, and will not be repeated here.

[0098] It should be noted that the ultra-high-speed electromagnetic drive power supply system and method based on the power flow converter provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functional distribution can be completed by different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiments can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0099] A control device for an ultra-high-speed electromagnetic drive power supply system based on a power flow converter according to a third embodiment of the present invention comprises:

[0100] at least one processor; and

[0101] a memory communicatively connected to at least one of the processors; wherein,

[0102] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement the control method of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter.

[0103] A computer-readable storage medium according to a fourth embodiment of the present invention stores computer instructions, and the computer instructions are used to be executed by the computer to implement the control method of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter.

[0104] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the storage device and processing device described above can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0105] Those skilled in the art should be able to appreciate that the modules and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two, and the programs corresponding to the software modules and method steps can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0106] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0107] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0108] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An ultra-high-speed electromagnetic drive power supply system based on a power flow converter, characterized in that: The ultra-high-speed electromagnetic drive power supply system includes the following modules: The energy storage device is connected to the primary connection terminals A1, B1 and C1 of the input transformer to provide energy for the ultra-high-speed electromagnetic drive power supply system; The secondary side of the input transformer and the secondary side of the output transformer respectively include m input transformer secondary windings and m output transformer secondary windings, wherein the phase of the three-phase voltage of the ith input transformer secondary winding lags behind the primary three-phase voltage of the input transformer by (60(i-1) / m)°, and the phase of the three-phase voltage of the ith output transformer secondary winding lags behind the primary three-phase voltage of the output transformer by (60(i-1) / m)°, 1≤i≤m, m is a positive integer and 60 is divisible by m; The input of the i-th current source converter among the m current source converters and the secondary winding of the i-th input transformer are connected to the terminals ui, vi and wi respectively, and the output of the i-th current source converter among the m current source converters and the secondary winding of the i-th output transformer are connected to the terminals ai, bi and ci respectively; The primary connection terminals A2, B2 and C2 of the output transformer are connected to the load to supply power to the load; The ultra-high-speed electromagnetic drive power supply system based on the power flow converter is implemented by a control method of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter, the method comprising: Step S10: If the ultra-high-speed electromagnetic drive power supply system inputs the secondary winding line voltage U uwi If the zero-crossing point is the phase starting reference point, then jump to step S20; if the ultra-high-speed electromagnetic drive power supply system uses the phase of the A2 phase current reference value Ia issued by the inverter side controller as the phase starting reference point when the phase is zero, then jump to step S30; Step S20, determine the range of the commutation angle θ sent by the rectifier-side controller and execute: If the line voltage U uwi When the phase is θ~θ+60°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned on, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned on; If the line voltage U uwi When the phase is θ+60°~θ+120°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned on, the power semiconductor switch Ti2 is turned on, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off; If the line voltage U uwi When the phase is θ+120°~θ+180°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned on, the power semiconductor switch Ti3 is turned on, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off; If the line voltage U uwi When the phase is θ+180°~θ+240°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned on, the power semiconductor switch Ti4 is turned on, the power semiconductor switch Ti5 is turned off, and the power semiconductor switch Ti6 is turned off; If the line voltage U uwi When the phase is θ+240°~θ+300°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned on, the power semiconductor switch Ti5 is turned on, and the power semiconductor switch Ti6 is turned off; If the line voltage U uwi When the phase is θ+300°~θ+360°, the power semiconductor switch Ti1 of the i-th current source rectifier is turned off, the power semiconductor switch Ti2 is turned off, the power semiconductor switch Ti3 is turned off, the power semiconductor switch Ti4 is turned off, the power semiconductor switch Ti5 is turned on, and the power semiconductor switch Ti6 is turned on; Step S30, determine the range of the A-phase current reference value Ia sent by the inverter-side controller and execute: If the phase of Ia is 30°+60(i-1) / m°~90°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned on, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned on; If the phase of Ia is 90°+60(i-1) / m°~150°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned on, the power semiconductor switch Si2 is turned on, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off; If the phase of Ia is 150°+60(i-1) / m°~210°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned on, the power semiconductor switch Si3 is turned on, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off; If the phase of Ia is 210°+60(i-1) / m°~270°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned on, the power semiconductor switch Si4 is turned on, the power semiconductor switch Si5 is turned off, and the power semiconductor switch Si6 is turned off; If the phase of Ia is 270°+60(i-1) / m°~330°+60(i-1) / m°, the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned on, the power semiconductor switch Si5 is turned on, and the power semiconductor switch Si6 is turned off; If the phase of Ia is 330°+60(i-1) / m°~360°+60(i-1) / m° or 60(i-1) / m°~30°+60(i-1) / m°, if the power semiconductor switch Si1 of the i-th current source inverter is turned off, the power semiconductor switch Si2 is turned off, the power semiconductor switch Si3 is turned off, the power semiconductor switch Si4 is turned off, the power semiconductor switch Si5 is turned on, and the power semiconductor switch Si6 is turned on.

2. The ultra-high-speed electromagnetic drive power supply system based on power flow converter according to claim 1 is characterized in that: The i-th current source converter comprises an i-th rectifier side, an i-th inverter side and a filter inductor L idc ; The i-th rectifier side includes an input side filter C fi1 , power semiconductor switch Ti1, power semiconductor switch Ti2, power semiconductor switch Ti3, power semiconductor switch Ti4, power semiconductor switch Ti5 and power semiconductor switch Ti6; The i-th inverter side includes an output side filter C fi2 , power semiconductor switch Si1, power semiconductor switch Si2, power semiconductor switch Si3, power semiconductor switch Si4, power semiconductor switch Si5 and power semiconductor switch Si6.

3. The ultra-high-speed electromagnetic drive power supply system based on power flow converter according to claim 2 is characterized in that: The module connection relationship of the i-th rectifier side is: Input filter C fi1 Connect to terminals ui, vi and wi respectively; The cathode of the power semiconductor switch Ti1, the cathode of the power semiconductor switch Ti3 and the cathode of the power semiconductor switch Ti5 are connected to the filter inductor L idc a first connection end; The anode of the power semiconductor switch Ti1 and the cathode of the power semiconductor switch Ti4 are connected to the terminal ui, the anode of the power semiconductor switch Ti3 and the cathode of the power semiconductor switch Ti6 are connected to the terminal vi, and the anode of the power semiconductor switch Ti5 and the cathode of the power semiconductor switch Ti2 are connected to the terminal wi; The anode of the power semiconductor switch Ti4 , the anode of the power semiconductor switch Ti6 , and the anode of the power semiconductor switch Ti2 are connected together.

4. The ultra-high-speed electromagnetic drive power supply system based on power flow converter according to claim 3 is characterized in that: The module connection relationship of the i-th inverter side is: Output filter C fi2 Connect to terminals ai, bi and ci respectively; The anode of the power semiconductor switch Si1, the anode of the power semiconductor switch Si3 and the anode of the power semiconductor switch Si5 are connected to the filter inductor L idc a second connection end; The cathode of the power semiconductor switch Si1 and the anode of the power semiconductor switch Si4 are connected to the terminal ai, the cathode of the power semiconductor switch Si3 and the anode of the power semiconductor switch Si6 are connected to the terminal bi, and the cathode of the power semiconductor switch Si5 and the anode of the power semiconductor switch Si2 are connected to the terminal ci; The cathode of the power semiconductor switch Si4, the cathode of the power semiconductor switch Si6 and the cathode of the power semiconductor switch Si2 are connected together, and are connected together with the anode of the power semiconductor switch Ti4, the anode of the power semiconductor switch Ti6 and the anode of the power semiconductor switch Ti2.

5. The ultra-high-speed electromagnetic drive power supply system based on power flow converter according to claim 4 is characterized in that: The input side filter C fi1 It includes three filter capacitors connected in a star manner to the terminals ui, vi and wi.

6. The ultra-high-speed electromagnetic drive power supply system based on power flow converter according to claim 5 is characterized in that: The output filter C fi2 It includes three filter capacitors connected in a star pattern to terminals ai, bi and ci.

7. The ultra-high-speed electromagnetic drive power supply system based on power flow converter according to claim 1, characterized in that: In the ultra-high-speed electromagnetic drive power supply system, the three-phase voltage phases of the ith winding on the secondary side of the input transformer and the ith winding on the secondary side of the corresponding output transformer are the same.

8. A control device for an ultra-high-speed electromagnetic drive power supply system based on a power flow converter, characterized in that: include: at least one processor; as well as a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement the functions performed by the control system of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter as described in any one of claims 1-7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement the functions performed by the control system of the ultra-high-speed electromagnetic drive power supply system based on the power flow converter as described in any one of claims 1-7.

Images