Converter suitable for comprehensive electromagnetic test platform and comprehensive electromagnetic test platform

Abstract

The invention relates to the technical field of converters, and discloses a converter suitable for a comprehensive electromagnetic test platform and the comprehensive electromagnetic test platform. The converter comprises a cabinet body, a control cabinet, a switch cabinet and a plurality of power cabinets, the control cabinet, the switch cabinet and the power cabinets are arranged in the cabinet body and sequentially connected, a water cooling system is further arranged in the cabinet body and used for cooling the power cabinets, the power cabinets are connected in a combined cabinet mode through a common direct-current bus, and each power cabinet comprises an upper weight, a middle weight and a lower weight. The common direct-current bus comprises a plurality of power units, each power unit comprises two power units and a sampling case, the two power units are symmetrically arranged by taking the sampling case as a center, the two power units are connected in parallel on the common direct-current bus through a confluence busbar, and the sampling case is used for performing power supply, signal acquisition, signal transmission and control on the two power units. The converter disclosed by the invention is high in generalization and combination degree, small in size and convenient for integrated debugging and modular production.

Description

Technical Field

[0001] The present invention relates to the technical field of converters, and in particular to a converter suitable for a comprehensive electromagnetic test platform and the comprehensive electromagnetic test platform. Background Art

[0002] The superconducting magnets onboard ultra-high-speed maglev trains operate in an environment of multiple magnetic field coupling, high electromagnetic vibration, and ultra-high speed. Currently, there is no relevant platform with this testing environment, which also means a lack of a platform to effectively verify the performance of superconducting magnets. Potential technical risks will extend to actual train operating conditions.

[0003] The superconducting magnets of ultra-high-speed maglev trains have the following unique characteristics: 1) The size and mass are larger, and the vibration capacity of the existing mechanical vibration table is seriously insufficient; 2) The operating conditions are mostly in the suspended cruising state, and electromagnetic vibration is the main vibration environment, which cannot be truly simulated by the mechanical vibration table; 3) The working time is long, and the time effect of the AC loss and vibration friction loss of the superconducting magnet cannot be ignored. Therefore, in combination with the characteristics and technical requirements of the superconducting magnets of ultra-high-speed maglev trains, in order to deeply understand the dynamic characteristics of the electromagnetic vibration quenching boundary and AC loss of superconducting magnets, it is necessary to build a comprehensive test platform for superconducting magnet performance. This test platform can simultaneously generate steady-state forces and transient forces for a total of three functions: suspension, propulsion, and guidance, to achieve the impact of the ground suspension propulsion system on the ultra-high-speed maglev train side in the static simulation target plan, and release the relevant risks of real vehicle testing in advance.

[0004] As the power source of the comprehensive electromagnetic test platform, the converter is used to provide the current required to simulate the electromagnetic environment. It dynamically adjusts the current, voltage and frequency to simulate the electromagnetic environment and force environment of the superconducting magnet during the suspension, propulsion and guidance process. However, the existing converters are large in size and have a low degree of universality. Summary of the invention

[0005] The present invention provides a converter suitable for a comprehensive electromagnetic test platform and a comprehensive electromagnetic test platform, which can solve the technical problems in the prior art.

[0006] The present invention provides a converter suitable for a comprehensive electromagnetic test platform, wherein the converter comprises a cabinet, and a control cabinet, a switch cabinet and a plurality of power cabinets arranged in the cabinet and connected in sequence, and a water cooling system is also arranged in the cabinet for cooling the plurality of power cabinets.

[0007] Multiple power cabinets are connected in parallel via a common DC bus, and the power cabinet includes an upper weight, a middle weight, and a lower weight, each weight includes two power units and a sampling chassis, and the two power units are symmetrically arranged with the sampling chassis as the center, and the two power units are connected in parallel on the common DC bus via a busbar, and the sampling chassis is used for power supply, signal collection, signal transmission and control of the two power units.

[0008] Preferably, for every two adjacent power cabinets in the multiple power cabinets, the first power unit in the upper weight of one of the power cabinets is combined with the first power unit in the upper weight of another of the power cabinets to form a loop, the first power unit in the middle weight of one of the power cabinets is combined with the first power unit in the middle weight of another of the power cabinets to form a loop, the first power unit in the lower weight of one of the power cabinets is combined with the first power unit in the upper weight of another of the power cabinets to form a loop, the second power unit in the upper weight of one of the power cabinets is combined with the second power unit in the upper weight of another of the power cabinets to form a loop, the second power unit in the middle weight of one of the power cabinets is combined with the second power unit in the middle weight of another of the power cabinets to form a loop, and the second power unit in the lower weight of one of the power cabinets is combined with the second power unit in the upper weight of another of the power cabinets to form a loop.

[0009] Preferably, the number of the power cabinets is 2, 4, 6 or 8.

[0010] Preferably, the water cooling system includes a main water inlet pipeline, a main water outlet pipeline, a branch water inlet pipeline, a branch water outlet pipeline and a flexible connecting pipe. The main water inlet pipeline passes through each power cabinet from the lower part of the cabinet, and branch water inlet pipelines and branch water outlet pipelines extend from between adjacent cabinets. The branch water inlet pipeline and branch water outlet pipeline are bent to the front side of the cabinet and connected to each power unit through the flexible connecting pipe. The main water outlet pipeline is led out from the upper part of the cabinet.

[0011] Preferably, the flexible connecting pipe is a PVC hose.

[0012] Preferably, a ventilation hole is arranged on the front door panel of the cabinet, a ventilation filter is arranged on the rear door panel of the cabinet, and a heat dissipation fan is arranged in the ventilation filter.

[0013] Preferably, the incoming line on the DC side of the switch cabinet is connected to the common DC bus through a copper busbar after passing through a DC knife switch and a DC fuse.

[0014] Preferably, a discharge contactor is provided on the top plate of the switch cabinet, and a discharge resistor is provided on the side plate of the switch cabinet. The discharge contactor and the discharge resistor are used to discharge the supporting capacitor of each power unit after power is turned off. A pre-charging resistor and a pre-charging contactor are provided on the lower part of the side plate of the switch cabinet. The pre-charging resistor and the pre-charging contactor are used to charge the supporting capacitor of each power unit before power is turned on.

[0015] Preferably, the control cabinet includes a main control chassis, a UPS and control-related components.

[0016] The present invention also provides a comprehensive electromagnetic test platform, which includes the above-mentioned converter.

[0017] Through the above technical solution, the control cabinet, switch cabinet and power cabinet can be modularly designed and can be combined as needed, with high universality and combination degree, small size, and convenient for integrated debugging and modular production. In addition, the power cabinet of the present invention has a compact structure, is connected by combining various power units, and each power unit is electrically connected to a common DC bus, which is convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A front view of a converter suitable for a comprehensive electromagnetic test platform according to an embodiment of the present invention is shown;

[0020] Figure 2 A rear view of a converter suitable for a comprehensive electromagnetic test platform according to an embodiment of the present invention is shown;

[0021] Figure 3A and 3B The figure shows the internal structure of a converter suitable for a comprehensive electromagnetic test platform according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions 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 only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in 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.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0025] like Figure 1 -3, an embodiment of the present invention provides a converter suitable for a comprehensive electromagnetic test platform, wherein the converter includes a cabinet body and a control cabinet 6, a switch cabinet 5 and a plurality of power cabinets arranged in the cabinet body and connected in sequence, and a water cooling system 7 is also arranged in the cabinet body for cooling the plurality of power cabinets.

[0026] Multiple power cabinets are connected in parallel via a common DC bus 8, and the power cabinets include an upper weight, a middle weight, and a lower weight, and each weight includes two power units 11 and a sampling chassis 12. The two power units 11 are symmetrically arranged with the sampling chassis 12 as the center, and the two power units 11 are connected in parallel to the common DC bus 8 via a busbar 13. The sampling chassis 12 is used for power supply, signal collection, signal transmission and control of the two power units 11.

[0027] That is, each power cabinet can be divided into three parts: upper, middle and lower. Each part includes two power units (first power unit and second power unit) and a sampling chassis. The sampling chassis of each part is responsible for the power supply, signal collection, signal transmission and control of the two power units of each weight. Among them, the common DC bus can be located in the middle of the power cabinet, and the common DC bus is connected between the power cabinets.

[0028] Through the above technical solution, the control cabinet, switch cabinet and power cabinet can be modularly designed and can be combined as needed, with high universality and combination degree, small size, and convenient for integrated debugging and modular production. In addition, the power cabinet of the present invention has a compact structure, is connected by combining various power units, and each power unit is electrically connected to a common DC bus, which is convenient for installation and maintenance.

[0029] According to one embodiment of the present invention, for every two adjacent power cabinets in the multiple power cabinets, the first power unit in the upper weight of one of the power cabinets is combined with the first power unit in the upper weight of another of the power cabinets to form a loop, the first power unit in the middle weight of one of the power cabinets is combined with the first power unit in the middle weight of another of the power cabinets to form a loop, the first power unit in the lower weight of one of the power cabinets is combined with the first power unit in the upper weight of another of the power cabinets to form a loop, the second power unit in the upper weight of one of the power cabinets is combined with the second power unit in the upper weight of another of the power cabinets to form a loop, the second power unit in the middle weight of one of the power cabinets is combined with the second power unit in the middle weight of another of the power cabinets to form a loop, and the second power unit in the lower weight of one of the power cabinets is combined with the second power unit in the upper weight of another of the power cabinets to form a loop.

[0030] According to an embodiment of the present invention, the number of the power cabinets is 2, 4, 6 or 8.

[0031] by Figure 1 For example, the number of power cabinets is 4, namely a first power cabinet 1, a second power cabinet 2, a third power cabinet 3 and a fourth power cabinet 4.

[0032] Taking 4 power cabinets as an example, they can be combined into 12 single-phase current outputs (12 loops) in sequence, and each phase current can be controlled individually.

[0033] According to one embodiment of the present invention, the water cooling system 7 includes a main water inlet pipeline 72, a main water outlet pipeline 71, a branch water inlet pipeline 73, a branch water outlet pipeline 75 and a flexible connecting pipe 74. The main water inlet pipeline 72 passes through each power cabinet from the lower part of the cabinet, and the branch water inlet pipeline 73 and the branch water outlet pipeline 75 extend from between adjacent cabinets. The branch water inlet pipeline 73 and the branch water outlet pipeline 75 are bent to the front side of the cabinet and connected to each power unit through the flexible connecting pipe 74. The main water outlet pipeline 71 is led out from the upper part of the cabinet.

[0034] In this way, cooling of the power cabinet can be achieved.

[0035] According to one embodiment of the present invention, the flexible connecting tube 74 is a PVC hose.

[0036] According to an embodiment of the present invention, a ventilation hole 15 is arranged on the front door panel of the cabinet, a ventilation filter 14 is arranged on the rear door panel of the cabinet, and a heat dissipation fan is arranged inside the ventilation filter 14 .

[0037] In this way, ventilation and heat dissipation of the power cabinet can be achieved to ensure its normal operation.

[0038] For example, ventilation holes may be provided at the lower portion of the front door panel of the cabinet, and a ventilation filter may be provided at the upper portion of the rear door panel of the cabinet.

[0039] According to an embodiment of the present invention, the DC side incoming line of the switch cabinet 5 passes through a DC switch 51 and a DC fuse 52 and then is connected to the common DC bus 8 through a copper busbar.

[0040] According to one embodiment of the present invention, a discharge contactor 53 is provided on the top plate of the switch cabinet, and a discharge resistor 54 is provided on the side plate of the switch cabinet. The discharge contactor 53 and the discharge resistor 54 are used to discharge the supporting capacitor of each power unit after power is turned off. A pre-charging resistor 56 and a pre-charging contactor 55 are provided on the lower part of the side plate of the switch cabinet. The pre-charging resistor 56 and the pre-charging contactor 55 are used to charge the supporting capacitor of each power unit before power is turned on.

[0041] In this way, the charging and discharging of the support capacitor of each power unit can be achieved.

[0042] According to an embodiment of the present invention, the control cabinet includes a main control chassis 61, a UPS 62 and control-related components.

[0043] Therefore, each power cabinet can be controlled through the control cabinet.

[0044] The control cabinet may also adopt the existing technology in the prior art, which will not be described in detail here in order not to confuse the present invention.

[0045] An embodiment of the present invention further provides a comprehensive electromagnetic test platform, which includes the converter described in the above embodiment.

[0046] Therefore, the use of universal, modular and combined converters can meet the current required by the comprehensive electromagnetic test platform to simulate the electromagnetic environment.

[0047] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A converter suitable for a comprehensive electromagnetic test platform, It is characterized in that The converter comprises a cabinet body, and a control cabinet, a switch cabinet and a plurality of power cabinets which are arranged in the cabinet body and connected in sequence. A water cooling system is also arranged in the cabinet body for cooling the plurality of power cabinets. Multiple power cabinets are connected in parallel via a common DC bus, and the power cabinet includes an upper weight, a middle weight, and a lower weight, each weight includes two power units and a sampling chassis, and the two power units are symmetrically arranged with the sampling chassis as the center, and the two power units are connected in parallel on the common DC bus via a busbar, and the sampling chassis is used for power supply, signal collection, signal transmission and control of the two power units.

2. The converter according to claim 1, It is characterized in that For every two adjacent power cabinets in the multiple power cabinets, the first power unit in the upper weight of one of the power cabinets is combined with the first power unit in the upper weight of another of the power cabinets to form a loop, the first power unit in the middle weight of one of the power cabinets is combined with the first power unit in the middle weight of another of the power cabinets to form a loop, the first power unit in the lower weight of one of the power cabinets is combined with the first power unit in the upper weight of another of the power cabinets to form a loop, the second power unit in the upper weight of one of the power cabinets is combined with the second power unit in the upper weight of another of the power cabinets to form a loop, the second power unit in the middle weight of one of the power cabinets is combined with the second power unit in the middle weight of another of the power cabinets to form a loop, and the second power unit in the lower weight of one of the power cabinets is combined with the second power unit in the upper weight of another of the power cabinets to form a loop.

3. The converter according to claim 2, It is characterized in that The number of the power cabinets is 2, 4, 6 or 8.

4. The converter according to claim 1, It is characterized in that The water cooling system includes a main water inlet pipeline, a main water outlet pipeline, a branch water inlet pipeline, a branch water outlet pipeline and a flexible connecting pipe. The main water inlet pipeline passes through each power cabinet from the lower part of the cabinet, and branch water inlet pipelines and branch water outlet pipelines extend from between adjacent cabinets. The branch water inlet pipeline and branch water outlet pipeline are bent to the front side of the cabinet and connected to each power unit through the flexible connecting pipe. The main water outlet pipeline is led out from the upper part of the cabinet.

5. The converter according to claim 4, It is characterized in that The flexible connecting pipe is a PVC hose.

6. The converter according to claim 4, It is characterized in that The front door panel of the cabinet is provided with ventilation holes, the rear door panel of the cabinet is provided with a ventilation filter screen, and a heat dissipation fan is provided in the ventilation filter screen.

7. The converter according to claim 6, It is characterized in that The incoming line on the DC side of the switch cabinet is connected to the common DC bus through a copper busbar after passing through a DC knife switch and a DC fuse.

8. The converter according to claim 7, It is characterized in that A discharge contactor is arranged on the top plate of the switch cabinet, and a discharge resistor is arranged on the side plate of the switch cabinet. The discharge contactor and the discharge resistor are used to discharge the supporting capacitor of each power unit after power is turned off. A pre-charging resistor and a pre-charging contactor are arranged on the lower part of the side plate of the switch cabinet. The pre-charging resistor and the pre-charging contactor are used to charge the supporting capacitor of each power unit before power is turned on.

9. The converter according to claim 8, It is characterized in that The control cabinet includes a main control chassis, a UPS and control-related components.

10. A comprehensive electromagnetic test platform, It is characterized in that The invention comprises the converter according to any one of claims 1 to 9.

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