Harmonic control method of high-voltage frequency converter and filter

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a high-voltage frequency converter harmonic control method and a filter. According to the method, the harmonic component in the output voltage of the frequency converter can be effectively reduced. According to the method disclosed by the invention, a relatively high fundamental frequency is obtained through modulation, and the voltage utilization rate is improved, so that the torque ripple of the motor is remarkably reduced. Under the same switching frequency, the method disclosed by the invention can generate the optimal output waveform. While the waveform quality is ensured, the switching frequency and the switching loss are reduced, and the overall efficiency of the system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a harmonic control method and a filter for a high-voltage frequency converter. Background Art

[0002] Generally speaking, high-voltage inverters (operating voltage range is between 3000V and 10000V) will generate a large amount of harmonics during operation, which will interfere with the power grid and adjacent equipment, affecting the stability and power quality of the power system. Therefore, effective control and optimization of high-voltage inverter harmonics has become an important research direction. However, the high-voltage inverter harmonic control optimization strategy in related technologies has the following problems.

[0003] 1. Complex technical implementation: High-voltage inverters have many internal electronic components and complex circuits. The higher the voltage level, the more components there are, which increases the difficulty of harmonic control. Some advanced harmonic control technologies, such as multiple rectification and parallel or series connection of inverter units, can effectively reduce harmonics, but the technical implementation is relatively complex and requires a high level of design and manufacturing.

[0004] 2. High cost: Although efficient harmonic suppression devices such as active power filters (APFs) have good filtering effects, they are also relatively expensive, increasing the overall investment in equipment. Complex harmonic control technology requires more material and manpower input, further pushing up costs.

[0005] 3. Difficulty in maintenance and overhaul: High-voltage inverter technology is complex, and maintenance and overhaul requires more professional technical operation and maintenance personnel, which increases the maintenance cost and difficulty of the equipment. In actual operation, troubleshooting and repair of harmonic control devices also require a high level of technology.

[0006] 4. Limited harmonic suppression effect: Although existing harmonic control technologies can reduce harmonics to a certain extent, it is often difficult to completely eliminate harmonics, especially when the load changes greatly, the harmonic suppression effect may be affected.

[0007] In view of the above factors, it is urgent to ensure the quality of harmonic control under the premise of low cost and easy implementation. Summary of the invention

[0008] In order to overcome the problems existing in the related art, a high-voltage inverter harmonic control method and a filter are provided.

[0009] According to one aspect of an embodiment of the present disclosure, a high-voltage inverter harmonic control method is provided, the method comprising:

[0010] Step 11, analyzing the output electrical signal of the high-voltage inverter to obtain the degree of freedom data θ1...θ N ;

[0011] Step 12: For the degree of freedom data θ1…θ obtained by analysis N , using equations 1, 2 to 6, the control reactor is used to eliminate harmonics in the output voltage of the high-voltage inverter;

[0012]

[0013] cos(5θ1)+…+cos(5θ5)=0 Formula 3

[0014] cos(7θ1)+…+cos(7θ5)=0 Equation 4

[0015] cos(11θ1)+…+cos(11θ5)=0 Equation 5

[0016] cos(13θ1)+…+cos(13θ5)=0 Equation 6

[0017] In formula 1, U(ωt) is the output voltage value after harmonic elimination, U dc is the phase voltage, N is the number of switching angles, θ1…θ N is the degree of freedom data, m is the harmonic order, ωt is the phase; Formula 2 is used to make the fundamental voltage U output by the high-voltage inverter F ,Formula 3 is used to eliminate the 5th harmonic voltage, Formula 4 is used to eliminate the 7th harmonic voltage, Formula 5 is used to eliminate the 11th harmonic voltage, and Formula 6 is used to eliminate the 13th harmonic voltage.

[0018] In a possible implementation, the rated current of the reactor is greater than or equal to 1.1 times the load current.

[0019] According to another aspect of an embodiment of the present disclosure, a high-voltage inverter harmonic control device is provided, the device comprising:

[0020] The analysis module is used to analyze the output electrical signal of the high-voltage inverter to obtain the degree of freedom data θ1…θ N ;

[0021] The control module is used to analyze the degree of freedom data θ1...θ N , using equations 1, 2 to 6, the output voltage of the high-voltage inverter is harmonic-eliminated;

[0022]

[0023] cos(5θ1)+…+cos(5θ5)=0 Formula 3

[0024] cos(7θ1)+…+cos(7θ5)=0 Equation 4

[0025] cos(11θ1)+…+cos(11θ5)=0 Equation 5

[0026] cos(13θ1)+…+cos(13θ5)=0 Equation 6

[0027] In formula 1, U(ωt) is the output voltage value after harmonic elimination, U dc is the phase voltage, N is the number of switching angles, θ1…θ N is the degree of freedom data, m is the harmonic order, ωt is the phase; Formula 2 is used to make the fundamental voltage U output by the high-voltage inverter F ,Formula 3 is used to eliminate the 5th harmonic voltage, Formula 4 is used to eliminate the 7th harmonic voltage, Formula 5 is used to eliminate the 11th harmonic voltage, and Formula 6 is used to eliminate the 13th harmonic voltage.

[0028] In a possible implementation, the rated current of the reactor is greater than or equal to 1.1 times the load current.

[0029] According to another aspect of an embodiment of the present disclosure, a high-voltage inverter is provided, the high-voltage inverter comprising: a control device and a reactor; the control device is configured to execute the method of claim 1 or 2.

[0030] In a possible implementation, the reactor adopts an LC resonant circuit structure.

[0031] In a possible implementation, the rated current of the reactor is greater than or equal to 1.1 times the load current.

[0032] In a possible implementation, the reactor can be installed individually, in a supporting manner, or customized according to demand.

[0033] In a possible implementation manner, a space that meets heat dissipation conditions is reserved around the reactor.

[0034] According to another aspect of an embodiment of the present disclosure, a non-volatile computer-readable storage medium is provided, on which computer program instructions are stored, and the computer program instructions implement the above method when executed by a processor.

[0035] The beneficial effects of the present disclosure are:

[0036] 1. Reduce harmonic components: The method disclosed in the present invention can effectively reduce the harmonic components in the output voltage of the frequency converter. The method disclosed in the present invention obtains a higher fundamental frequency through modulation, improves the voltage utilization rate, and thus significantly reduces the torque pulsation of the motor.

[0037] 2. Optimize output waveform: Under the same switching frequency, the method disclosed in the present invention can generate the optimal output waveform, which can reduce the switching frequency and switching loss while ensuring the waveform quality, thereby improving the overall efficiency of the system.

[0038] 3. High reliability: The structure of the reactor in series at the output end of the high-voltage inverter in the present disclosure adopts multi-phase multiple superposition rectification technology. In an application example, the input power factor can reach above 0.95, the total harmonic distortion is less than 1.5%, and the overall efficiency is significantly improved. This structure can meet the strict requirements of power supply departments of various countries on harmonics without the need for an external filter, thereby improving the reliability of the system.

[0039] 4. Easy to control: The control method disclosed in the present invention is relatively simple. Since each level of the H-bridge in the high-voltage inverter has the same structure, each level can be PWM controlled separately, and then the waveform can be reorganized. This modular design and manufacturing method not only brings convenience to design and manufacturing, but also makes it easy to control.

[0040] 5. High adaptability: The method disclosed in the present invention can adapt to inverters of different powers and loads, and can adjust the control strategy according to changes in grid impedance to ensure stable operation of the system.

[0041] In summary, the high-voltage inverter harmonic control method disclosed in the present invention has significant advantages over traditional technologies in terms of reducing harmonic components, optimizing output voltage and current waveforms, improving reliability, easy control, and high adaptability.

[0042] It effectively solves the problem that traditional inverters cannot accurately control the harmonics of output voltage and current. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a flow chart of a high-voltage inverter harmonic control method shown in an embodiment of the present disclosure.

[0044] Figure 2 Schematic diagram of a circuit of a high-voltage inverter shown in an embodiment of the present disclosure.

[0045] Figure 3 Schematic diagram of a circuit of a high-voltage inverter shown in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] The present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.

[0048] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] Figure 1 is a flow chart of a high-voltage inverter harmonic control method shown in an embodiment of the present disclosure. The method can be executed by a terminal device, wherein the terminal device can be a server, a desktop computer, a laptop computer, a tablet computer, etc. The terminal device can also be, for example, a user device, a vehicle-mounted device or a wearable device, etc. The embodiment of the present disclosure does not limit the type of the terminal device. Figure 1 As shown, the method includes:

[0050] Step 11, analyzing the output electrical signal of the high-voltage inverter to obtain the degree of freedom data θ1...θ N ;

[0051] Step 12: Degree of freedom data θ1…θ of the output of the high-voltage inverter N , using equations 1, 2 to 6, a harmonic elimination method is selected to eliminate harmonics in the output voltage of the high-voltage inverter.

[0052]

[0053] Among them, U(ωt) is the output voltage value after eliminating harmonics, U dc is the phase voltage, N is the number of switching angles, θ1…θ N is the degree of freedom, m is the harmonic order, and ωt is the phase.

[0054]

[0055] cos(5θ1)+…+cos(5θ5)=0Formula 3

[0056] cos(7θ1)+…+cos(7θ5)=0Equation 4

[0057] cos(11θ1)+…+cos(11θ5)=0Equation 5

[0058] cos(13θ1)+…+cos(13θ5)=0Equation 6

[0059] Among them, formula 2 is used to ensure that the fundamental voltage U output by the high-voltage inverter is F ,Formula 3 is used to eliminate the 5th harmonic voltage, Formula 4 is used to eliminate the 7th harmonic voltage, Formula 5 is used to eliminate the 11th harmonic voltage, and Formula 6 is used to eliminate the 13th harmonic voltage.

[0060] Generally speaking, a multi-stage cascade inverter consists of a series of H bridges. Figure 2 The single-phase structure of the H-bridge cascade multilevel inverter is shown, taking phase A as an example. Figure 2 It can be seen that for a single H-bridge, different levels of DC voltage output are achieved through different combinations of the four switches S1, S2, S3, and S4. For a multi-level inverter with M H-bridges per phase, the number of levels output per phase is 2M+1. Taking a multi-level inverter composed of 5 H-bridges per phase as an example, its output phase voltage waveform is as follows: Figure 3 As shown, the phase voltage waveform U AM It is periodic. Taking phase A as an example, the single-phase output voltage U of the H-bridge cascade inverter is AM The relationship with each H-bridge output voltage is shown in the following equation 7.

[0061] U AM =U C1 +U C2 +…+U CM Formula 7

[0062] After Fourier expansion of equation 7, equation 8 can be obtained.

[0063]

[0064] in,

[0065] Further, from Figure 3 It can be seen that the phase voltage U AN The waveform is symmetrical between 1 / 2 and 1 / 4 periods, and the following equation can be obtained through Fourier transform.

[0066] n is an odd number

[0067] a n =0, n is an even number

[0068] Among them, ki is the coefficient of Fourier transform. If the amplitude of the output main frequency voltage is a1, then the modulation coefficient ma=a1 / NE, N is the number of H bridges per phase, and E is the DC bus voltage value of a single H bridge. If the output phase voltage of the H-bridge cascade multilevel inverter is composed of N switching angles per phase, then N independent equations can be obtained after Fourier transform. N switching angles provide N degrees of freedom, which can be used to eliminate N harmonics or N-1 harmonics and make the modulation coefficient ma adjustable. In a symmetrical waveform, the even harmonics are automatically eliminated. For a three-phase system, the line voltage does not contain any third harmonics, so the harmonics that need to be eliminated for the H-bridge cascade inverter are non-third odd harmonics. The Fourier transform of the phase voltage step waveform of Equation 8 can be obtained as Equation 1.

[0069] In a possible implementation, the reactor is installed at the output end of the high-voltage inverter to filter out the harmonic current output by the high-voltage inverter. The reactor may adopt an LC resonant circuit structure to form a passive filter structure.

[0070] In a possible implementation, the rated current of the final electrical load (such as a motor) is used as the selection basis, and the rated current of the reactor should be greater than or equal to 1.1 times the load current. Therefore, the rated working current, actual working current, load rate, rated working voltage and power supply frequency of the load are considered to ensure that the working requirements of the reactor are met.

[0071] In one possible implementation, the reactor can be installed separately, in combination, or customized according to customer needs. During installation, ensure that there is enough heat dissipation space around the reactor. In addition, attention should be paid to the installation environment of the reactor, which should meet the requirements of its use environment, including temperature, humidity, altitude, etc. The harmonic pollution of the inverter to the power grid can be effectively reduced within a certain range.

[0072] The high-voltage inverter harmonic control method provided by the present disclosure has the following characteristics:

[0073] 1. Reduce harmonic components: The method disclosed in the present invention can effectively reduce the harmonic components in the output voltage of the frequency converter. The method disclosed in the present invention obtains a higher fundamental frequency through modulation, improves the voltage utilization rate, and thus significantly reduces the torque pulsation of the motor.

[0074] 2. Optimize output waveform: Under the same switching frequency, the method disclosed in the present invention can generate the optimal output waveform, which can reduce the switching frequency and switching loss while ensuring the waveform quality, thereby improving the overall efficiency of the system.

[0075] 3. High reliability: The structure of the reactor in series at the output end of the high-voltage inverter in the present disclosure adopts multi-phase multiple superposition rectification technology. In an application example, the input power factor can reach above 0.95, the total harmonic distortion is less than 1.5%, and the overall efficiency is significantly improved. This structure can meet the strict requirements of power supply departments of various countries on harmonics without the need for an external filter, thereby improving the reliability of the system.

[0076] 4. Easy to control: The control method disclosed in the present invention is relatively simple. Since each level of the H-bridge in the high-voltage inverter has the same structure, each level can be PWM controlled separately, and then the waveform can be reorganized. This modular design and manufacturing method not only brings convenience to design and manufacturing, but also makes it easy to control.

[0077] 5. High adaptability: The method disclosed in the present invention can adapt to inverters of different powers and loads, and can adjust the control strategy according to changes in grid impedance to ensure stable operation of the system.

[0078] In summary, the high-voltage inverter harmonic control method disclosed in the present invention has significant advantages over traditional technologies in terms of reducing harmonic components, optimizing output voltage and current waveforms, improving reliability, easy control, and high adaptability.

[0079] In a possible implementation, a high-voltage inverter harmonic control device is provided, the device comprising:

[0080] The analysis module is used to analyze the output electrical signal of the high-voltage inverter to obtain the degree of freedom data θ1…θ N ;

[0081] The control module is used to analyze the degree of freedom data θ1...θ N , using equations 1, 2 to 6, the output voltage of the high-voltage inverter is harmonic-eliminated;

[0082]

[0083] cos(5θ1)+…+cos(5θ5)=0 Formula 3

[0084] cos(7θ1)+…+cos(7θ5)=0 Equation 4

[0085] cos(11θ1)+…+cos(11θ5)=0 Equation 5

[0086] cos(13θ1)+…+cos(13θ5)=0 Equation 6

[0087] In formula 1, U(ωt) is the output voltage value after harmonic elimination, U dc is the phase voltage, N is the number of switching angles, θ1…θN is the degree of freedom data, m is the harmonic order, ωt is the phase; Formula 2 is used to make the fundamental voltage U output by the high-voltage inverter F ,Formula 3 is used to eliminate the 5th harmonic voltage, Formula 4 is used to eliminate the 7th harmonic voltage, Formula 5 is used to eliminate the 11th harmonic voltage, and Formula 6 is used to eliminate the 13th harmonic voltage.

[0088] In a possible implementation, the rated current of the reactor is greater than or equal to 1.1 times the load current.

[0089] The description of the above-mentioned device has been explained in detail in the description of the above-mentioned method, and will not be repeated here.

[0090] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0091] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0092] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0093] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0094] Various aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0095] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0096] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0097] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the specified logical function. In some alternative implementations, the function marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or action, or can be implemented with a combination of special hardware and computer instructions.

[0098] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A high voltage inverter harmonic control method, characterized in that: The method comprises: Step 11, analyzing the output electrical signal of the high-voltage inverter to obtain the degree of freedom data θ1...θ N ; Step 12: For the degree of freedom data θ1…θ obtained by analysis N , using equations 1, 2 to 6, the control reactor is used to eliminate harmonics in the output voltage of the high-voltage inverter; cos(5θ1)+…+cos(5θ5)=0 Formula 3 cos(7θ1)+…+cos(7θ5)=0 Equation 4 cos(11θ1)+…+cos(11θ5)=0 Equation 5 cos(13θ1)+…+cos(13θ5)=0 Equation 6 In formula 1, U(ωt) is the output voltage value after harmonic elimination, U dc is the phase voltage, N is the number of switching angles, θ1…θ N is the degree of freedom data, m is the harmonic order, ωt is the phase; Formula 2 is used to make the fundamental voltage U output by the high-voltage inverter F ,Formula 3 is used to eliminate the 5th harmonic voltage, Formula 4 is used to eliminate the 7th harmonic voltage, Formula 5 is used to eliminate the 11th harmonic voltage, and Formula 6 is used to eliminate the 13th harmonic voltage.

2. The method according to claim 1, characterized in that The rated current of the reactor is greater than or equal to 1.1 times the load current.

3. A high voltage inverter harmonic control device, characterized in that: The device comprises: The analysis module is used to analyze the output electrical signal of the high-voltage inverter to obtain the degree of freedom data θ1…θ N ; The control module is used to analyze the degree of freedom data θ1...θ N , using equations 1, 2 to 6, the output voltage of the high-voltage inverter is harmonic-eliminated; cos(5θ1)+…+cos(5θ5)=0 Formula 3 cos(7θ1)+…+cos(7θ5)=0 Equation 4 cos(11θ1)+…+cos(11θ5)=0 Equation 5 cos(13θ1)+…+cos(13θ5)=0 Equation 6 In formula 1, U(ωt) is the output voltage value after harmonic elimination, U dc is the phase voltage, N is the number of switching angles, θ1…θ N is the degree of freedom data, m is the harmonic order, ωt is the phase; Formula 2 is used to make the fundamental voltage U output by the high-voltage inverter F ,Formula 3 is used to eliminate the 5th harmonic voltage, Formula 4 is used to eliminate the 7th harmonic voltage, Formula 5 is used to eliminate the 11th harmonic voltage, and Formula 6 is used to eliminate the 13th harmonic voltage.

4. The device according to claim 1, characterized in that The rated current of the reactor is greater than or equal to 1.1 times the load current.

5. A high voltage frequency converter, characterized in that: The high-voltage frequency converter comprises: a control device and a reactor; the control device is configured to execute the method according to claim 1 or 2.

6. The high voltage frequency converter according to claim 5, characterized in that: The reactor adopts an LC type resonant circuit structure.

7. The high voltage frequency converter according to claim 5, characterized in that: The rated current of the reactor is greater than or equal to 1.1 times the load current.

8. The high voltage frequency converter according to claim 5, characterized in that: The reactor can be installed individually, in combination or customized according to requirements.

9. The high voltage frequency converter according to claim 5, characterized in that: A space satisfying heat dissipation conditions is reserved around the reactor.

10. A non-volatile computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to claim 1 or 2 is implemented.

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