Nested hollow bridge arm reactor and design method thereof

Abstract

The invention discloses a nested hollow bridge arm reactor and a design method thereof, and belongs to the technical field of power system equipment.The design method comprises the steps that basic design parameters of the reactor are determined according to use requirements; establishing a plurality of hollow bridge arm reactor units according to the basic design parameters, and arranging the hollow bridge arm reactor units in a nested manner to obtain a nested structure; carrying out modular segmentation on the nested structure, wherein each module comprises at least one hollow bridge arm reactor unit; arranging a wire winding in the nested structure to obtain a nested hollow bridge arm reactor; and performing performance verification and adjustment on the nested hollow bridge arm reactor to obtain the final nested hollow bridge arm reactor. According to the invention, a nested structural design is adopted, through reasonable wire winding arrangement, modular design and performance verification and adjustment, the defects of large size, low material utilization rate, non-uniform magnetic field distribution and the like can be overcome, and a more efficient, reliable and economical solution is provided for a filtering and reactive compensation system in high-voltage alternating-current and direct-current power transmission.

Description

Technical Field

[0001] The invention relates to the technical field of power system equipment, and in particular to a nested hollow bridge arm reactor and a design method thereof. Background Art

[0002] With the continuous growth of global energy demand and the rapid development of power technology, UHV AC and DC transmission technology has become an important part of the modern power system. UHV transmission technology can not only effectively improve the efficiency and capacity of power transmission, but also reduce the energy loss in the transmission process, which is of great significance for realizing long-distance and large-scale power transmission. In this context, the performance optimization and innovation of dry-type air-core reactors, as indispensable filtering and reactive power compensation equipment in power systems, are particularly important.

[0003] At present, traditional dry-type air-core reactors have been widely used in power systems. These reactors usually adopt a cylindrical structure, which has the advantages of stable structure and mature manufacturing process. However, with the continuous advancement of power technology and the increasing requirements of power systems for equipment performance, the design limitations of traditional reactors have gradually emerged. Especially in high-voltage direct current transmission and ultra-high voltage alternating current transmission lines, the large volume, low material utilization rate and uneven magnetic field distribution of traditional reactors have limited their further application and development in modern power systems. Therefore, there is an urgent need for a new type of reactor that can effectively solve the problems of material waste and uneven magnetic field distribution, and improve the electromagnetic performance and operation stability of the reactor. Summary of the invention

[0004] To solve the above problems, the present invention provides a nested hollow bridge arm inductor and a design method thereof. The nested structure design is adopted, and through reasonable wire winding arrangement, modular design, performance verification and adjustment, the disadvantages of large size, low material utilization rate, and uneven magnetic field distribution can be overcome, thereby providing a more efficient, reliable and economical solution for filtering and reactive power compensation systems in high-voltage AC and DC power transmission.

[0005] The above objectives can be achieved through the following solutions: A nested hollow bridge arm reactor design method comprises determining basic design parameters of the reactor according to use requirements; establishing a plurality of hollow bridge arm reactor units according to the basic design parameters, and arranging the plurality of hollow bridge arm reactor units in a nested manner to obtain a nested structure; performing modular division on the nested structure, wherein each module comprises at least one hollow bridge arm reactor unit; arranging a conductor winding in the nested structure to obtain a nested hollow bridge arm reactor; and performing performance verification and adjustment on the nested hollow bridge arm reactor to obtain a final nested hollow bridge arm reactor.

[0006] Optionally, the hollow bridge arm reactor unit is a copper strip structure of spiral winding design, and a plurality of the hollow bridge arm reactor units are concentrically nested to form the nested structure.

[0007] Optionally, the number of turns of the hollow bridge arm reactor unit is adjusted according to preset conditions.

[0008] Optionally, the performance verification and adjustment of the nested hollow bridge arm reactor includes: using finite element analysis to calculate the electromagnetic force value of the reactor; performing modal analysis using the electromagnetic force value to obtain a first analysis result; and adjusting the nested structure and the wire winding according to the first analysis result.

[0009] Optionally, the performance verification and adjustment of the nested hollow bridge arm reactor also includes: calculating the vibration response data of the reactor at different frequencies through Fourier series expansion; performing harmonic response analysis using the vibration response data to obtain a second analysis result; and adjusting the nested structure and the wire winding according to the second analysis result.

[0010] Optionally, the performance verification and adjustment of the nested hollow bridge arm inductor also includes: obtaining radiation noise data of the inductor at different frequencies through sound pressure level simulation; performing noise analysis based on the radiation noise data to obtain a third analysis result; and adjusting the nested structure and the wire winding based on the third analysis result.

[0011] Based on the same inventive concept, the present invention also provides a nested hollow bridge arm reactor, which is designed using the design method described in any of the above items, and is characterized in that the reactor comprises: a plurality of nested hollow bridge arm reactor units, each of the hollow bridge arm reactor units is a copper strip structure of a spirally wound design, and a wire winding is arranged inside the reactor.

[0012] Optionally, the reactor is divided into modules, and each module contains at least one hollow bridge arm reactor unit.

[0013] Optionally, the reactor verifies and adjusts the nested structure and the wire windings according to a first analysis result of the modal analysis, a second analysis result of the harmonic response analysis, and a third analysis result of the noise analysis.

[0014] Optionally, the reactor is suitable for filters and reactive power compensation devices in high-voltage AC and DC power transmission.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention effectively nests and arranges multiple hollow bridge arm reactor units through a nested structural design, thereby significantly reducing the overall volume of the reactor; compared with traditional reactors, the reduced volume provides greater flexibility for the layout and installation of the power system; 2. The nested design of the present invention not only reduces the volume, but also improves the utilization rate of materials and reduces the manufacturing cost; this design reduces material waste and makes the production of the reactor more economical and efficient; 3. The present invention significantly improves the electromagnetic performance of the reactor through optimized magnetic field distribution design and accurate electromagnetic force calculation; the nested structure design makes the electromagnetic force distribution inside the reactor more uniform, reduces the local magnetic field concentration phenomenon, and thus improves the electromagnetic stability and operation reliability of the reactor; especially under the conditions of high current and high frequency, the present invention exhibits more excellent electromagnetic performance; 4. The present invention adjusts the hollow bridge arm reactor unit and the conductor winding through sound pressure level simulation analysis, so that the radiation noise of the nested hollow bridge arm reactor at different frequencies is significantly reduced; compared with the traditional column reactor, the sound pressure level of the nested hollow bridge arm reactor of the present invention is greatly reduced under the same conditions, providing a quieter and more comfortable operating environment for the power system; this noise reduction effect is not only conducive to the long-term stable operation of power equipment, but also meets the requirements of modern society for environmental protection performance; 5. The modular design of the reactor of the present invention makes maintenance and replacement easier, prolongs the service life of the equipment and reduces operating costs; at the same time, the nested structure further improves the power density of the equipment, reduces local heating during operation, and improves the overall operating efficiency.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a flow chart of a method for designing a nested hollow bridge arm reactor according to an embodiment of the present invention.

[0019] Figure 2It is a schematic diagram of the overall structure of a nested hollow bridge arm reactor according to an embodiment of the present invention.

[0020] Figure 3 It is a front view of a nested hollow bridge arm reactor according to an embodiment of the present invention.

[0021] Figure 4 It is a top view of a nested hollow bridge arm reactor according to an embodiment of the present invention.

[0022] Figure 5 It is a magnetic field density cloud diagram of a nested hollow bridge arm reactor according to an embodiment of the present invention.

[0023] Figure 6 It is a surface stress density cloud diagram of a nested hollow bridge arm reactor according to an embodiment of the present invention.

[0024] Figure 7 It is a curve diagram of the relationship between the excitation frequency and the maximum stress of the toroidal reactor according to the embodiment of the present invention.

[0025] Figure 8 It is a sound pressure level cloud diagram of a nested hollow bridge arm reactor at a distance of 5 m according to an embodiment of the present invention.

[0026] Fig. 9 It is a sound pressure level cloud diagram of a cylindrical hollow bridge arm reactor at a distance of 5 m according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Reference Figure 1 An embodiment of the present invention proposes a nested hollow bridge arm reactor design method, which adopts a nested structure design, through reasonable wire winding arrangement, modular design and performance verification and adjustment, can overcome the shortcomings of large volume, low material utilization, uneven magnetic field distribution, etc., and provide a more efficient, reliable and economical solution for filtering and reactive power compensation systems in high-voltage AC and DC power transmission.

[0029] The method of this embodiment specifically includes: Determine the basic design parameters of the reactor according to usage requirements; Specifically, before designing a nested hollow bridge arm reactor, its basic design parameters need to be clarified; these parameters are usually determined according to the use requirements of the reactor, including but not limited to rated voltage, rated current, operating frequency, required reactive compensation or filtering effect, etc.; specifically, for the filter reactor in the high-voltage direct current transmission system, it may be necessary to consider the high voltage and direct current that it can withstand, as well as the required filtering effect.

[0030] For example, assume that you need to design a nested hollow bridge arm reactor for a high-voltage direct current transmission system, with a rated voltage of ±800kV, a rated current of 6000A, an operating frequency of 50Hz, and a reactive compensation of 500MVar; based on these parameters, you can start designing the specific structure of the reactor.

[0031] Establishing a plurality of hollow bridge arm reactor units according to the basic design parameters, and arranging the plurality of hollow bridge arm reactor units in a nested manner to obtain a nested structure; Specifically, after determining the basic design parameters, it is necessary to establish multiple hollow bridge arm reactor units; these units can adopt the same structure, but the size and winding parameters may vary according to actual needs; then, these units are arranged in a nested manner to reduce the overall volume of the reactor and improve material utilization.

[0032] For example, according to the previous design parameters, three hollow bridge arm reactor units of different sizes can be designed, namely large, medium and small specifications; then the three units are nested and arranged in order from large to small to form a compact nested structure; sufficient space is left inside each unit to accommodate the wire winding and ensure uniform distribution of the electromagnetic field.

[0033] Divide the nested structure into modules, each module comprising at least one hollow bridge arm reactor unit; Specifically, in order to facilitate the maintenance and replacement of the reactor, the nested structure can be divided into modules; each module can include at least one hollow bridge arm reactor unit, or more units according to actual needs; the modular design can not only improve the maintainability of the reactor, but also can be flexibly combined and expanded according to actual needs.

[0034] Exemplarily, in the above nested structure, each hollow bridge arm reactor unit can be used as an independent module; thus, when a unit fails, it can be conveniently taken out of the nested structure and replaced without affecting the normal operation of other units.

[0035] Arranging wire windings in the nested structure to obtain a nested hollow bridge arm reactor; Specifically, arranging the wire windings in the nested structure is one of the key steps in the design of the reactor; the design of the windings needs to take into account factors such as the distribution of the electromagnetic field, current density, and heat dissipation; through reasonable winding arrangement, it can be ensured that the reactor has excellent electromagnetic performance and operational stability.

[0036] For example, inside each hollow bridge arm reactor unit, the wires can be arranged in a multi-layer spiral winding manner; sufficient gaps are left between each layer of windings to ensure uniform distribution of heat dissipation and electromagnetic fields; at the same time, parameters such as the number of turns and wire diameter of the winding can be adjusted as needed to meet specific design requirements.

[0037] The performance of the nested hollow bridge arm reactor is verified and adjusted to obtain the final nested hollow bridge arm reactor.

[0038] Specifically, performance verification and adjustment of the nested hollow bridge arm reactor is an important step to ensure its quality and reliability; this may include electromagnetic performance testing, vibration noise testing, temperature testing and other aspects; through testing, problems in the reactor design can be discovered and corresponding adjustments can be made to obtain the final nested hollow bridge arm reactor.

[0039] For example, after the design of the reactor is completed, the finite element analysis method (FEM) can be used to perform electromagnetic field simulation analysis on it to verify the quality of its electromagnetic performance; at the same time, experimental verifications such as vibration noise testing and temperature testing can also be performed; if the test results do not meet the design requirements, the structure or winding parameters of the reactor can be adjusted, and retested and verified until the design requirements are met.

[0040] Optionally, the hollow bridge arm reactor unit is a copper strip structure of spiral winding design, and a plurality of the hollow bridge arm reactor units are concentrically nested to form the nested structure.

[0041] Specifically, each hollow bridge arm reactor unit adopts a copper tape structure with a spiral winding design; this design utilizes the high conductivity and good mechanical properties of the copper tape, and the copper tape is tightly wound on a specific bracket or core shaft through a spiral winding method to form a reactor unit with specific inductance and impedance characteristics; the spiral winding method not only improves the utilization rate of the material, but also enhances the uniformity of the electromagnetic field through a continuous conductive path and reduces the local magnetic field concentration phenomenon; multiple hollow bridge arm reactor units are combined together through concentric nesting to form a nested structure; this nested design makes full use of the space, reduces the overall volume and weight of the reactor, and at the same time optimizes the internal magnetic field distribution and improves the electromagnetic performance; during the nesting process, each unit maintains its independent electromagnetic characteristics, and the nested combination realizes the superposition of inductance and the mutual enhancement of the electromagnetic field.

[0042] Optionally, the number of turns of the hollow bridge arm reactor unit is adjusted according to preset conditions.

[0043] Specifically, when designing a nested hollow bridge arm reactor, the number of turns of each hollow bridge arm reactor unit is a key parameter, which directly affects the electromagnetic performance and overall size of the reactor; the determination of the number of turns is not arbitrary, but needs to be finely adjusted according to preset conditions; according to the electromagnetic performance requirements of the reactor in a specific application scenario, the required range of turns is determined through theoretical calculation or simulation analysis, and the electromagnetic performance requirements can be inductance, impedance characteristics, etc.; the number of turns is closely related to the current carrying capacity. Under given wire diameter and insulation conditions, an increase in the number of turns will increase the inductance of the reactor, but will also increase resistance loss and temperature rise. Therefore, the number of turns needs to be reasonably adjusted according to the rated current and heat dissipation conditions; for application scenarios with limited space, the selection of the number of turns also needs to consider the overall volume and weight of the reactor. While maintaining the electromagnetic performance, the size and weight are optimized by adjusting the number of turns; an increase in the number of turns means an increase in material usage, which affects the manufacturing cost. Therefore, when adjusting the number of turns, the material cost and economic benefits must also be considered comprehensively.

[0044] For example, Figure 2 As shown, a nested hollow bridge arm reactor is designed. The hollow bridge arm reactor units of the reactor can be three, so the reactor adopts a three-layer concentric copper strip structure, such as Figure 3 As shown in the figure, each layer of copper tape is spirally wound; the outermost copper tape constitutes the outer ring, which is mainly used to enhance the shielding effect of the peripheral magnetic field; the middle copper tape is the middle ring, which plays a role in buffering the electromagnetic force through reasonable arrangement; the innermost copper tape is the inner ring, as shown in the figure. Figure 4 As shown in the figure, the design is closest to the center area of ​​the inductor to enhance the magnetic field strength and optimize the internal magnetic field distribution; each layer of copper tape forms a turn after each circle, and according to the preset conditions, the inductor as a whole contains 111 turns; this multi-layer nested structure makes the internal magnetic field of the inductor more uniform and significantly reduces the local magnetic field concentration phenomenon; in addition, the optimized design of the leakage inductance also improves the stability of the inductor under high-frequency working conditions.

[0045] Optionally, the performance verification and adjustment of the final nested hollow bridge arm reactor includes: The electromagnetic force value of the reactor is calculated using the finite element analysis method; Specifically, the finite element analysis (FEM) method is used to accurately calculate the reactor and obtain its electromagnetic force value under different working conditions; the finite element analysis method is a numerical analysis method that can accurately simulate and calculate the distribution and changes of complex electromagnetic fields, thereby providing strong theoretical support for the design and optimization of the reactor.

[0046] For example, a nested hollow bridge arm reactor with a specific structure was selected in the design, and finite element analysis software was used to model and calculate it. By inputting key information such as the material parameters, geometric dimensions, and current density of the reactor, the software can automatically calculate the magnetic field distribution and electromagnetic force value inside the reactor, and obtain the following: Figure 5 The magnetic field density cloud diagram shown; these calculation results will serve as the basis for subsequent analysis and adjustments.

[0047] Performing modal analysis using the electromagnetic force value to obtain a first analysis result; Specifically, after obtaining the electromagnetic force value of the reactor, these data are used to perform modal analysis; modal analysis is a structural dynamics analysis method that can reveal the vibration mode and frequency response characteristics of the structure under specific excitation; through modal analysis, the vibration conditions and potential resonance risks of the reactor at different frequencies can be understood, thereby providing a basis for structural optimization and adjustment.

[0048] Exemplarily, the calculated electromagnetic force value is used as excitation and input into the modal analysis software; the software calculates the modal parameters such as the natural frequency and vibration mode of the inductor based on these excitations, and generates a corresponding first analysis result; through the first analysis result, it is found that the inductor has a large vibration amplitude and stress concentration at a certain specific frequency, which may have an adverse effect on its long-term operating stability.

[0049] The nested structure and the wire winding are adjusted according to the first analysis result.

[0050] Specifically, according to the first analysis result of the modal analysis, the nested structure and the wire winding of the reactor are adjusted and optimized; the purpose of this step is to eliminate or alleviate potential vibration and stress concentration problems and improve the operating stability and service life of the reactor.

[0051] For example, for the vibration problem found in the modal analysis, it is considered to reduce the vibration amplitude and stress concentration by adjusting the thickness, width and spacing of each layer of copper strips in the nested structure, as well as optimizing the arrangement and number of turns of the wire windings. After multiple iterations and optimizations, the nested hollow bridge arm reactor is subjected to modal analysis to obtain the natural frequency and vibration mode of the reactor, and generate the first analysis result. The first analysis result shows that the reactor has good frequency response characteristics in the range of 200Hz to 1000Hz, and the vibration mode is relatively stable, which meets the design requirements of power equipment, such as Figure 6 As shown; finally, a nested hollow bridge arm reactor with better performance and more reasonable structure was obtained.

[0052] Optionally, the performance verification and adjustment of the final nested hollow bridge arm reactor further includes: The vibration response data of the reactor at different frequencies are calculated by Fourier series expansion; Specifically, Fourier series expansion is a method of decomposing a periodic signal into sine waves of different frequencies. In the performance verification of the reactor, Fourier series expansion can be used to calculate the vibration response data of the reactor at different frequencies. These data can reveal the vibration characteristics and response patterns of the reactor at different excitation frequencies, providing a basis for subsequent harmonic response analysis.

[0053] For example, suppose a nested hollow bridge arm inductor is designed, and it is desired to understand its vibration response at different frequencies; the inductor can be placed on a vibration test bench, excitation signals of different frequencies can be applied, and its vibration response can be measured using a sensor; then the measured data can be processed using Fourier series expansion to obtain the vibration response data of the inductor at different frequencies.

[0054] Performing harmonic response analysis using the vibration response data to obtain a second analysis result; Specifically, harmonic response analysis is a method used to predict the dynamic response of a structure under periodic excitation. In the performance verification of the reactor, the vibration response data previously obtained through Fourier series expansion can be used for harmonic response analysis. Through harmonic response analysis, the dynamic response characteristics of the reactor such as amplitude and phase under different frequency excitations can be understood, as well as whether there are potential problems such as resonance.

[0055] Exemplarily, based on the vibration response data previously obtained through Fourier series expansion, the harmonic response analysis software is used to perform a simulation analysis on the reactor; the software calculates the dynamic response characteristics of the reactor under different frequency excitations based on the input data and the set analysis parameters, and generates a second analysis result; through the second analysis result, one can intuitively understand the trend of the amplitude of the reactor changing with frequency, and whether there is a resonant frequency point.

[0056] The nested structure and the wire winding are adjusted according to the second analysis result.

[0057] Specifically, according to the second analysis result of the harmonic response analysis, the nested structure and wire windings of the reactor can be adjusted and optimized; if the second analysis result shows that there are problems such as resonant frequency points or excessive amplitude, the vibration amplitude and stress concentration can be reduced by adjusting parameters such as the thickness, width and spacing of the copper strip, and optimizing the layout and number of turns of the wire windings, thereby improving the operating stability and service life of the reactor.

[0058] For example, in the second analysis result, it was found that the reactor had resonance at a certain frequency, resulting in a significant increase in amplitude. To solve this problem, the thickness of some layers of copper strips in the nested structure can be increased to increase its stiffness and reduce the resonance frequency. At the same time, the arrangement of the wire windings was also fine-tuned to improve its electromagnetic performance and heat dissipation performance. After adjustment and optimization, the harmonic response analysis was performed again, such as Figure 7 As shown, the results show that the maximum stress of the reactor at 200Hz is 15.902kPa, and the surface deformation is very small, which meets the design requirements; at higher frequencies, the maximum stress of the reactor gradually increases, but is still within the bearing range of the material as a whole, indicating that the nested reactor in the present invention has good reliability in high-frequency working environments.

[0059] Optionally, the performance verification and adjustment of the final nested hollow bridge arm reactor further includes: The radiation noise data of the reactor at different frequencies is obtained through sound pressure level simulation; Specifically, sound pressure level simulation is a method that uses computer simulation technology to predict the radiation noise level of an object under specific conditions; for nested hollow bridge arm reactors, sound pressure level simulation can be used to predict their radiation noise data at different frequencies; these data will help understand the noise characteristics of the reactor under different working conditions and provide a basis for subsequent noise analysis.

[0060] For example, suppose a nested hollow bridge arm reactor is designed, and it is desired to evaluate its radiation noise level at different frequencies; professional sound pressure level simulation software can be used to establish a simulation model based on parameters such as the reactor's geometric dimensions, material properties, and operating conditions; then, by running the simulation model, the radiation noise data of the reactor at different frequencies can be obtained, including information such as sound pressure level and spectrum distribution.

[0061] Perform noise analysis according to the radiation noise data to obtain a third analysis result; Specifically, after obtaining the radiation noise data of the reactor, noise analysis is required to evaluate its noise performance; noise analysis can include spectrum analysis, sound power level calculation, noise source identification and other aspects; through noise analysis, we can have an in-depth understanding of the noise characteristics of the reactor, such as the main noise components, the location of the noise source, etc., to provide guidance for subsequent optimization design.

[0062] Exemplarily, based on the radiation noise data previously obtained through sound pressure level simulation, the inductor is further analyzed using noise analysis software; the software automatically calculates key indicators such as the sound power level and spectrum distribution of the inductor based on the input data, and generates a third analysis result; through the third analysis result, it can be found that the inductor has obvious noise peaks within a certain frequency range, which may be caused by vibration or electromagnetic interference of certain components.

[0063] The nested structure and the wire winding are adjusted according to the third analysis result.

[0064] Specifically, according to the third analysis result of the noise analysis, the nested structure and wire windings of the reactor can be adjusted and optimized; if the analysis results show that there are noise peaks or the noise level is too high, the noise level can be reduced by changing the arrangement of the copper tapes in the nested structure, adding sound insulation materials, optimizing the layout and number of turns of the wire windings, etc.; these adjustments are intended to improve the acoustic performance of the reactor and reduce its noise pollution to the surrounding environment.

[0065] For example, in the third analysis result, it is found that the reactor has an obvious noise peak in a certain frequency range; in order to reduce the noise level, a layer of sound insulation material can be added to the nested structure to absorb and isolate the noise; at the same time, the layout of the wire winding is also fine-tuned to reduce the generation of electromagnetic interference and vibration noise; after adjustment and optimization, such as Figure 8 As shown in the figure, the sound pressure level simulation and noise analysis were performed again. The simulation results show that at the design frequency of 200Hz, the maximum sound pressure level of the reactor at a distance of 5 meters is 65.2dB, while the traditional cylindrical reactor, such as Fig. 9 As shown in the figure, under the same conditions, the sound pressure level is as high as 102.1dB. The nested design has a significant noise reduction effect and has important engineering application value.

[0066] Based on the same inventive concept, the present invention also provides a nested hollow bridge arm reactor, which comprises: a plurality of nested hollow bridge arm reactor units, each of which is a copper strip structure of spiral winding design, and a wire winding is arranged inside the reactor.

[0067] Optionally, the reactor is divided into modules, and each module contains at least one hollow bridge arm reactor unit.

[0068] Optionally, the reactor verifies and adjusts the nested structure and the wire windings according to a first analysis result of the modal analysis, a second analysis result of the harmonic response analysis, and a third analysis result of the noise analysis.

[0069] Optionally, the reactor is suitable for filters and reactive power compensation devices in high-voltage AC and DC power transmission.

[0070] The above is only an exemplary embodiment of the present invention and cannot be used to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the teachings of the present invention are still within the scope of the present invention. After considering the disclosure of the specification and the truth of practice, it will be easy for those skilled in the art to think of other embodiments of the present invention. This application is intended to cover any variation, use or adaptive change of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the technical field not recorded in the present invention.

Claims

1. A method for designing a nested hollow bridge arm reactor, characterized in that: The method comprises: Determine the basic design parameters of the reactor according to usage requirements; Establishing a plurality of hollow bridge arm reactor units according to the basic design parameters, and arranging the plurality of hollow bridge arm reactor units in a nested manner to obtain a nested structure; Divide the nested structure into modules, each module comprising at least one hollow bridge arm reactor unit; Arranging wire windings in the nested structure to obtain a nested hollow bridge arm reactor; The performance of the nested hollow bridge arm reactor is verified and adjusted to obtain the final nested hollow bridge arm reactor.

2. A method for designing a nested hollow bridge arm reactor according to claim 1, characterized in that: The hollow bridge arm reactor unit is a copper strip structure of spiral winding design, and a plurality of the hollow bridge arm reactor units are concentrically nested to form the nested structure.

3. A method for designing a nested hollow bridge arm reactor according to claim 2, characterized in that: The number of turns of the hollow bridge arm reactor unit is adjusted according to preset conditions.

4. A method for designing a nested hollow bridge arm reactor according to claim 1, characterized in that: The performance verification and adjustment of the nested hollow bridge arm reactor includes: The electromagnetic force value of the reactor is calculated using the finite element analysis method; Performing modal analysis using the electromagnetic force value to obtain a first analysis result; The nested structure and the wire winding are adjusted according to the first analysis result.

5. The method for designing a nested hollow bridge arm reactor according to claim 1, characterized in that: The performance verification and adjustment of the nested hollow bridge arm reactor also includes: The vibration response data of the reactor at different frequencies are calculated by Fourier series expansion; Performing harmonic response analysis using the vibration response data to obtain a second analysis result; The nested structure and the wire winding are adjusted according to the second analysis result.

6. A method for designing a nested hollow bridge arm reactor according to claim 1, characterized in that: The performance verification and adjustment of the nested hollow bridge arm reactor also includes: The radiation noise data of the reactor at different frequencies is obtained through sound pressure level simulation; Perform noise analysis according to the radiation noise data to obtain a third analysis result; The nested structure and the wire winding are adjusted according to the third analysis result.

7. A nested hollow bridge arm reactor, designed using the design method according to any one of claims 1 to 6, characterized in that: The reactor comprises: a plurality of nested hollow bridge arm reactor units, each of which is a copper strip structure of spiral winding design, and a wire winding is arranged inside the reactor.

8. The nested hollow bridge arm reactor according to claim 7, characterized in that: The reactor is divided into modules, and each module contains at least one hollow bridge arm reactor unit.

9. The nested hollow bridge arm reactor according to claim 7, characterized in that: The reactor verifies and adjusts the nested structure and the wire winding according to the first analysis result of the modal analysis, the second analysis result of the harmonic response analysis and the third analysis result of the noise analysis.

10. The nested hollow bridge arm reactor according to claim 7, characterized in that: The reactor is suitable for filters and reactive power compensation devices in high-voltage AC and DC power transmission.

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