Direct-current power supply control method, control terminal, and direct-current power supply

Abstract

The application provides a direct-current power supply control method, a control terminal and a direct-current power supply. The direct-current power supply comprises a phase-shifting transformer, a plurality of rectifier modules and a plurality of compensation modules. The input end of each rectifier module is connected with different output windings of the phase-shifting transformer, and the output end of each rectifier module is used for supplying power to a corresponding load. The direct-current power supply control method comprises the following steps: obtaining the power factor of the phase-shifting transformer and the load capacity of each rectifier module; and controlling the plurality of compensation modules to be connected to the input end of each rectifier module according to the power factor of the phase-shifting transformer and the load capacity of each rectifier module. The application improves the power factor of the direct-current power supply by controlling the compensation modules to be connected from the hardware perspective, and the method is simple and reliable, and can further improve the power factor of the direct-current power supply and improve the performance of the direct-current power supply.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a direct current power supply control method, a control terminal and a direct current power supply. BACKGROUND

[0002] High-power and high-performance direct current power supply relates to the fields of power electronics, power system, electrical automation technology, theoretical electrotechnics, etc., and is increasingly widely applied in the fields of communication, factories, laboratories, etc. of various trades. High-power direct current power supply is usually realized by rectification after phase-shifting transformer. As an important parameter for measuring the performance of power supply, the greater the power factor (PF value) is, the higher the utilization rate of power supply is, and the better the performance of power supply is.

[0003] In the prior art, software is usually used to improve the power factor of high-power direct current power supply, and the algorithm is complex, the reliability is low, and the power factor value is difficult to improve after reaching a certain value. SUMMARY

[0004] Embodiments of the present application provide a direct current power supply control method, a control terminal and a direct current power supply, to solve the problems of complex algorithm, low reliability and limited value in the prior art by improving the power factor through software.

[0005] In a first aspect, embodiments of the present application provide a direct current power supply control method, and the direct current power supply comprises a phase-shifting transformer, a plurality of rectifier modules and a plurality of compensation modules; wherein the input ends of the rectifier modules are respectively connected with different output windings of the phase-shifting transformer, and the output ends of the rectifier modules are used to supply power to corresponding loads.

[0006] The direct current power supply control method comprises:

[0007] obtaining the power factor of the phase-shifting transformer and the load of each rectifier module;

[0008] controlling the compensation modules to be connected to the input ends of the rectifier modules according to the power factor of the phase-shifting transformer and the load of each rectifier module.

[0009] In a second aspect, embodiments of the present application provide a control terminal, comprising a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the steps of the direct current power supply control method provided in any one of the first aspect of the present application.

[0010] In a third aspect, embodiments of the present application provide a direct current power supply, comprising a phase-shifting transformer, a plurality of rectifier modules, a plurality of compensation modules and a control terminal provided in the second aspect of the present application.

[0011] The input end of each rectifier module is connected to a different output winding of the phase-shifting transformer, and the output end of each rectifier module is used to supply power to the corresponding load.

[0012] The embodiment of the present invention provides a DC power supply control method, a control terminal and a DC power supply. The DC power supply includes: a phase-shifting transformer, multiple rectifier modules, and multiple compensation modules; wherein the input end of each rectifier module is respectively connected to a different output winding of the phase-shifting transformer, and the output end of each rectifier module is used to supply power to the corresponding load; the DC power supply control method includes: obtaining the power factor of the phase-shifting transformer and the load of each rectifier module; according to the power factor of the phase-shifting transformer and the load of each rectifier module, controlling the multiple compensation modules to be connected to the input end of each rectifier module. The embodiment of the present invention controls the connection of the compensation module to the input end of the rectifier module according to the power factor and the load of each rectifier module. From a hardware perspective, the power factor of the DC power supply is improved by connecting the hardware compensation module. The method is simple and reliable, can further improve the power factor of the DC power supply, and improves the performance of the DC power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic structural diagram of a DC power supply provided by an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of an implementation flow of a DC power supply control method provided by an embodiment of the present invention;

[0016] Figure 3 1 is a schematic structural diagram of a notch filter provided by an embodiment of the present invention;

[0017] Figure 4 1 is a schematic structural diagram of a DC power supply control device provided by an embodiment of the present invention;

[0018] Figure 5 It is a schematic diagram of a control terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be described in conjunction with the accompanying drawings and specific embodiments.

[0021] It shows a direct current power supply control method provided by an embodiment of the present application, which is used for controlling a direct current power supply. Referring to Figure 1 The direct current power supply comprises a phase-shifting transformer 11, a plurality of rectifier modules 12, and a plurality of compensation modules 13. The input end of each rectifier module 12 is connected with a different output winding of the phase-shifting transformer 11, and the output end of each rectifier module 12 is used for supplying power to a corresponding load. Figure 2 It shows an implementation flowchart of the direct current power supply control method, which is described in detail as follows.

[0022] The direct current power supply control method comprises the following steps.

[0023] S101: acquiring the power factor of the phase-shifting transformer 11 and the load amount of each rectifier module 12.

[0024] S102: controlling the plurality of compensation modules 13 to be connected to the input end of each rectifier module 12 according to the power factor of the phase-shifting transformer 11 and the load amount of each rectifier module 12.

[0025] In the embodiment of the present application, the compensation module 13 is controlled to be connected to the input end of each rectifier module 12 according to the power factor of the phase-shifting transformer 11 and the load amount of each rectifier module 12. The connection of the hardware device compensation module 13 can further improve the power factor of the phase-shifting transformer 11. The method is simple and reliable, the power factor is further improved, and the performance of the direct current power supply is improved.

[0026] In a possible implementation manner, S102 can comprise the following steps.

[0027] S1021: determining whether the power factor of the phase-shifting transformer 11 is greater than a preset power factor.

[0028] S1022: if the power factor of the phase-shifting transformer 11 is greater than the preset power factor, controlling each compensation module 13 not to be connected.

[0029] S1023: If the power factor of the phase-shifting transformer 11 is not greater than the preset power factor, the first number of compensation modules 13 needed to be connected is determined according to the power factor of the phase-shifting transformer 11.

[0030] S1024: According to the load amount of each rectifier module 12, the first number of compensation modules 13 is controlled to be connected to the input end of each rectifier module 12.

[0031] In the embodiment of the present application, if the power factor is already high (greater than the preset power factor), it indicates that the performance of the direct-current power supply is already superior, and the improvement of the power factor after connecting the compensation module 13 is not obvious, and the effect is not significant, so the compensation module 13 can not be connected. If the power factor is not greater than the preset power factor, the first number of compensation modules 13, i.e., the total number of compensation modules 13 connected to each rectifier module 12, can be determined according to the power factor, and each rectifier module 12 is compensated to improve the power factor.

[0032] Since the load amounts of each rectifier module 12 are unbalanced, the operating conditions of each rectifier module 12 are different, and the compensation degree is also different, therefore, after the total number of compensation modules 13 (the first number) is determined, the compensation modules 13 can be allocated to each rectifier module 12 according to the load amount of each rectifier module 12 in the embodiment of the present application, so as to realize accurate compensation and make the power factor improved more greatly by connecting the same number of compensation modules 13.

[0033] In a possible implementation, S1024 can include:

[0034] 1. Determine the average of the load amounts of each rectifier module 12;

[0035] 2. Based on the average of the load amounts and the first number, determine the number of compensation modules 13 connected to each rectifier module 12 respectively, and control each rectifier module 12 to connect to the corresponding number of compensation modules 13 respectively.

[0036] When the load amounts of each rectifier module 12 are unbalanced, the power is unbalanced, and the ripple of the rectifier module 12 with a large load amount passing through the output winding of the phase-shifting transformer 11 will interfere with the rectifier module 12 with a minimum load amount, thereby reducing the power factor of the phase-shifting transformer 11, therefore, the rectifier module 12 with a large load amount can be compensated less or not compensated, and the rectifier module 12 with a small load amount needs to be compensated more. Based on this, the average of the load amounts is determined as a reference in the embodiment of the present application, and the compensation modules 13 are allocated to each rectifier module based on the reference, so as to realize accurate compensation.

[0037] For example, the compensation modules 13 connected to each rectifier module 12 can be 0, 1, 3, and 4 in number, respectively, so as to realize accurate compensation of each rectifier module 12.

[0038] In a possible implementation, S1023 can include:

[0039] 1. calculating a difference between the power factor of the phase-shifting transformer 11 and the preset power factor;

[0040] 2. determining the first number according to the difference.

[0041] The greater the difference between the power factor of the phase-shifting transformer 11 and the preset power factor, the greater the power factor to be improved, and thus more compensation modules 13 should be connected for compensation to improve the power factor. Therefore, the first number can be determined according to the difference in the embodiment of the application.

[0042] In a possible implementation, determining the first number according to the difference can include:

[0043] determining the first number according to the difference and the first formula;

[0044] The first formula can be:

[0045] N=k*ΔPF

[0046] wherein N is the first number, ΔPF is the difference, and k is a compensation coefficient.

[0047] In the embodiment of the application, the compensation coefficient is set, and the first number is determined according to the compensation coefficient. The greater the difference, the more compensation modules 13 are connected, and the greater the power factor is improved, so that the power factor of the phase-shifting transformer 11 can be effectively improved, thereby ensuring the performance of the direct-current power supply.

[0048] In a possible implementation, S102 can include:

[0049] S1025: determining a second number of compensation modules 13 to be connected according to the power factor of the phase-shifting transformer 11;

[0050] S1026: determining a rectifier module 12 with the smallest load among the rectifier modules 12 according to the load of each rectifier module 12;

[0051] S1027: controlling the second number of compensation modules 13 to be connected to the input end of the rectifier module 12 with the smallest load.

[0052] The rectifier module 12 that has the greatest impact on the power factor of the phase-shift transformer 11 is usually the rectifier module with the smallest load, and the rectifier module with a large load causes crosstalk, thereby affecting the power factor of the phase-shift transformer 11. Therefore, the embodiment of the present application can also compensate only the rectifier module with the smallest load to improve the performance of the DC power supply.

[0053] In a possible implementation, after S102, the above method can further include:

[0054] S102: repeatedly performing the steps of obtaining the power factor of the phase-shift transformer 11 and the load of each rectifier module 12 until the power factor of the phase-shift transformer 11 and the load of each rectifier module 12 are used to control the plurality of compensation modules 13 to access the input end of each rectifier module 12.

[0055] Since the operating condition of the DC power supply changes after compensation, the embodiment of the present application can adjust the access of the compensation module 13 in real time to achieve precise compensation control.

[0056] In a possible implementation, the compensation module 13 can be a wave trap.

[0057] The wave trap is a resonant circuit that can rapidly attenuate an input signal at a certain frequency point to achieve the filtering effect of hindering the passage of signals at this frequency. In the embodiment of the present application, the wave trap is selected as the compensation module 13, which can effectively reduce the ripple interference caused by crosstalk of other output modules, improve the power factor of the phase-shift transformer 11, and improve the performance of the DC power supply.

[0058] In a possible implementation, with reference to Figure 3 , the wave trap can further include: a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, a second inductor L2, and a third inductor L3.

[0059] The first end of the first capacitor C1 is connected to the second end of the second capacitor C2, the second end of the first capacitor C1 is connected to the first end of the third capacitor C3, and the second end of the third capacitor C3 is connected to the first end of the second capacitor C2.

[0060] The first end of the first capacitor C1 is also connected to the first access end through the first inductor L1.

[0061] The first end of the second capacitor C2 is also connected to the second access end through the second inductor L2.

[0062] The first end of the third capacitor C3 is also connected to the third access end through the third inductor L3.

[0063] The first access end, the second access end and the third access end are respectively used for connecting with three-phase input ends of the rectifier module 12.

[0064] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

[0065] The following is the device embodiment of the application, and for details not described in detail, reference can be made to the corresponding method embodiments described above.

[0066] Figure 4 The structure diagram of the direct current power supply control device provided by the embodiment of the application is shown, only the part related to the embodiment of the application is shown for the convenience of description, and the details are as follows:

[0067] As Figure 4 shown, the direct current power supply control device is applied to a direct current power supply, and the direct current power supply comprises a phase-shifting transformer 11, a plurality of rectifier modules 12 and a plurality of compensation modules 13; wherein the input ends of each rectifier module 12 are respectively connected with different output windings of the phase-shifting transformer 11, and the output ends of each rectifier module 12 are used for supplying power to a corresponding load;

[0068] The above direct current power supply control device comprises:

[0069] A parameter acquisition module 21 is configured to acquire the power factor of the phase-shifting transformer 11 and the load amount of each rectifier module 12.

[0070] A compensation access module 22 is configured to control the plurality of compensation modules 13 to access the input ends of each rectifier module 12 according to the power factor of the phase-shifting transformer 11 and the load amount of each rectifier module 12.

[0071] In a possible implementation, the compensation access module 22 can comprise:

[0072] A comparison unit is configured to determine whether the power factor of the phase-shifting transformer 11 is greater than a preset power factor.

[0073] A first judgment unit is configured to control none of the compensation modules 13 to access if the power factor of the phase-shifting transformer 11 is greater than the preset power factor.

[0074] A second judgment unit is configured to determine a first number of compensation modules 13 that need to be accessed according to the power factor of the phase-shifting transformer 11 if the power factor of the phase-shifting transformer 11 is not greater than the preset power factor.

[0075] A first access control unit is configured to control the first number of compensation modules 13 to access the input ends of each rectifier module 12 according to the load amount of each rectifier module 12.

[0076] In a possible implementation, the access unit can include:

[0077] a mean value determining sub-unit configured to determine a mean value of the load amount of each rectifying module 12;

[0078] a compensation sub-unit configured to determine, based on the mean value of the load amount and the first number, a number of compensation modules 13 to be accessed by each rectifying module 12 respectively, and control each rectifying module 12 to access the corresponding number of compensation modules 13 respectively.

[0079] In a possible implementation, the second judging unit can include:

[0080] a difference calculating sub-unit configured to calculate a difference between the power factor of the phase-shifting transformer 11 and the preset power factor;

[0081] a first number outputting sub-unit configured to determine the first number according to the difference.

[0082] In a possible implementation, the total number outputting sub-unit can be specifically configured to:

[0083] determine the first number according to the difference and the first formula;

[0084] The first formula can be:

[0085] N=k*ΔPF

[0086] wherein N is the first number, ΔPF is the difference, and k is a compensation coefficient.

[0087] In a possible implementation, the compensation access module 22 can include:

[0088] a second number calculating unit configured to determine, according to the power factor of the phase-shifting transformer 11, a second number of compensation modules 13 to be accessed;

[0089] a target determining unit configured to determine, according to the load amount of each rectifying module 12, a rectifying module 12 with the smallest load amount among the rectifying modules 12;

[0090] a second access control unit configured to control the second number of compensation modules 13 to access the input end of the rectifying module 12 with the smallest load amount.

[0091] In a possible implementation, the device can further include:

[0092] The update module is used to repeatedly execute the steps of obtaining the power factor of the phase-shifting transformer 11 and the load of each rectifier module 12, and controlling multiple compensation modules 13 to connect to the input end of each rectifier module 12 according to the power factor of the phase-shifting transformer 11 and the load of each rectifier module 12.

[0093] In a possible implementation, the compensation module 13 may be a notch filter.

[0094] Figure 5 Schematic diagram of the control terminal 3 provided by the embodiment of the present invention. Figure 5 As shown, the control terminal 3 of this embodiment includes: a processor 30 and a memory 31. The memory 31 is used to store a computer program 32, and the processor 30 is used to call and run the computer program 32 stored in the memory 31 to perform the steps in the above-mentioned embodiments of the DC power supply control method, such as Figure 2 Alternatively, the processor 30 is used to call and run the computer program 32 stored in the memory 31 to implement the functions of each module / unit in the above-mentioned device embodiments, such as Figure 4 The functions of modules 21 to 22 are shown.

[0095] For example, the computer program 32 may be divided into one or more modules / units, one or more modules / units being stored in the memory 31 and executed by the processor 30 to implement the present invention. One or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program 32 in the control terminal 3. For example, the computer program 32 may be divided into Figure 4 Modules / units 21 to 22 are shown.

[0096] The control terminal 3 can be a computing device such as a desktop computer, a notebook, a palmtop computer, or a cloud server. The control terminal 3 can include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art will understand that Figure 5 It is only an example of the control terminal 3 and does not constitute a limitation on the control terminal 3. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0097] The processor 30 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0098] The memory 31 can be an internal storage unit of the terminal 3, for example, a hard disk or a memory of the terminal 3. The memory 31 can also be an external storage device of the terminal 3, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal 3. Further, the memory 31 can include both the internal storage unit and the external storage device of the terminal 3. The memory 31 is used to store computer programs and other programs and data required by the terminal. The memory 31 can also be used to temporarily store data that has been output or will be output.

[0099] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the above described functions. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit, and the integrated unit can be realized in the form of hardware or in the form of software. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0100] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0101] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in 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 beyond the scope of the present application.

[0102] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / terminal and method can be implemented in other ways. For example, the apparatus / terminal embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between each other can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0103] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0104] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0105] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of each method embodiment when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, an executable file, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0106] Corresponding to the above embodiments, with reference to Figure 1 The embodiment of the present application also provides a direct current power supply, which comprises a phase-shifting transformer 11, a plurality of rectifier modules 12, a plurality of compensation modules 13 and the control terminal 3 provided in the above embodiment.

[0107] The input end of each rectifier module 12 is connected with a different output winding of the phase-shifting transformer 11, and the output end of each rectifier module 12 is used to supply power for a corresponding load.

[0108] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A direct current power supply control method characterized by comprising: The direct-current power supply comprises a phase-shifting transformer, a plurality of rectifier modules and a plurality of compensation modules; wherein the input ends of each rectifier module are connected with different output windings of the phase-shifting transformer respectively, and the output ends of each rectifier module are used for supplying power to corresponding loads; The direct-current power supply control method comprises: obtaining the power factor of the phase-shifting transformer and the load amount of each rectifier module; controlling the plurality of compensation modules to be connected to the input ends of each rectifier module according to the power factor of the phase-shifting transformer and the load amount of each rectifier module.

2. The direct-current power supply control method according to claim 1, wherein The step of controlling the plurality of compensation modules to be connected to the input ends of each rectifier module according to the power factor of the phase-shifting transformer and the load amount of each rectifier module comprises: determining whether the power factor of the phase-shifting transformer is greater than a preset power factor; if the power factor of the phase-shifting transformer is greater than the preset power factor, controlling none of the compensation modules to be connected; if the power factor of the phase-shifting transformer is not greater than the preset power factor, determining a first number of compensation modules that need to be connected according to the power factor of the phase-shifting transformer; controlling the first number of compensation modules to be connected to the input ends of each rectifier module according to the load amount of each rectifier module.

3. The direct-current power supply control method according to claim 2, wherein The step of controlling the first number of compensation modules to be connected to the input ends of each rectifier module according to the load amount of each rectifier module comprises: determining the average of the load amount of each rectifier module; determining the number of compensation modules that each rectifier module needs to be connected to based on the average of the load amount and the first number, and controlling each rectifier module to be connected to the corresponding number of compensation modules.

4. The direct-current power supply control method according to claim 2, wherein The step of determining the first number of compensation modules that need to be connected according to the power factor of the phase-shifting transformer comprises: calculating the difference between the power factor of the phase-shifting transformer and the preset power factor; determining the first number according to the difference.

5. The direct-current power supply control method according to claim 4, wherein The step of determining the first number according to the difference comprises: determining the first number according to the difference by combining a first formula; The first formula is: N=k*ΔPF wherein N is the first number, ΔPF is the difference, and k is a compensation coefficient.

6. The direct-current power supply control method according to claim 1, wherein The step of controlling the plurality of compensation modules to be connected to the input ends of each rectifier module according to the power factor of the phase-shifting transformer and the load amount of each rectifier module comprises: determining a second number of compensation modules that need to be connected according to the power factor of the phase-shifting transformer; determining the rectifier module with the minimum load amount among each rectifier module according to the load amount of each rectifier module; controlling the second number of compensation modules to be connected to the input end of the rectifier module with the minimum load amount.

7. The direct-current power supply control method according to claim 6, wherein After the step of controlling the plurality of compensation modules to be connected to the input ends of each rectifier module according to the power factor of the phase-shifting transformer and the load amount of each rectifier module, the method further comprises: repeating the steps of obtaining the power factor of the phase-shifting transformer and the load amount of each rectifier module until the step of controlling the plurality of compensation modules to be connected to the input ends of each rectifier module according to the power factor of the phase-shifting transformer and the load amount of each rectifier module.

8. The direct-current power supply control method according to any one of claims 1 to 7, characterized by, The compensation module is a wave trap.

9. A control terminal, characterized by comprising: A computer program product comprising a processor and a memory for storing a computer program, the processor being configured to invoke and run the computer program stored in the memory to perform the steps of the direct current power supply control method according to any one of claims 1 to 8.

10. A direct current power supply, characterized by comprising: Comprise: A phase-shifting transformer, a plurality of rectifier modules, a plurality of compensation modules and the control terminal according to claim 9; Wherein the input end of each rectifier module is connected with different output windings of the phase-shifting transformer, and the output end of each rectifier module is used for supplying power for corresponding load.

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