A cable laying structure of a marine photovoltaic box transformer

Abstract

The present disclosure provides a cable laying structure of a marine photovoltaic box transformer, belonging to the technical field of marine photovoltaic equipment. The box transformer comprises a box body; the box body has a low-voltage terminal and a high-voltage terminal; the laying structure comprises a first cable bridge, a second cable bridge, a first conductive part and a second conductive part; the first cable bridge and the second cable bridge are respectively arranged on both sides of the box body, and the first cable bridge and the second cable bridge are symmetrically arranged about the first direction of the box body; the first conductive part is electrically connected with the high-voltage terminal; wherein part of the first conductive part away from one side of the high-voltage terminal is located on the first cable bridge; the rest of the first conductive part away from one side of the high-voltage terminal is located on the second cable bridge; the second conductive part is electrically connected with the low-voltage terminal. The laying structure can facilitate the reasonable layout of the cable under the premise of ensuring the safe use of the box transformer.

Description

Technical Field

[0001] This disclosure relates to the field of marine photovoltaic equipment technology, and more specifically, to a cable laying structure for a marine photovoltaic box-type transformer. Background Technology

[0002] In related technologies, when it comes to offshore power generation projects, how to effectively lay cables for box-type transformers is a crucial task. This not only affects the power conversion efficiency of offshore projects but also directly impacts the overall cost of the project.

[0003] For offshore photovoltaic (PV) projects, since all components are located at sea, especially the box-type transformers used for power conversion, the difficulty of laying and the cable layout inside them are different from those of box-type transformers installed on land. This makes the cable laying of offshore box-type transformers relatively difficult. How to lay cables efficiently and safely for the box-type transformers in offshore PV projects, thereby improving the power generation efficiency of offshore PV projects, is one of the key engineering issues that needs to be addressed.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a cable laying structure for a marine photovoltaic box-type transformer. This structure facilitates the rational layout of cables while ensuring the safe use of the box-type transformer.

[0006] According to one aspect of this disclosure, a cable laying structure for a marine photovoltaic box-type transformer is provided, the box-type transformer including a box body; the box body having low-voltage terminals and high-voltage terminals;

[0007] The laying structure includes a first cable tray, a second cable tray, a first conductive part, and a second conductive part;

[0008] The first cable tray and the second cable tray are respectively disposed on both sides of the main body of the box, and the first cable tray and the second cable tray are symmetrically arranged about the main body of the box in a first direction.

[0009] The first conductive part is electrically connected to the high-voltage terminal; wherein, a portion of the first conductive part, on the side away from the high-voltage terminal, is located on the first cable tray; the remaining portion of the first conductive part, on the side away from the high-voltage terminal, is located on the second cable tray.

[0010] The second conductive part is electrically connected to the low-voltage terminal.

[0011] According to one embodiment of the present disclosure, the first conductive part includes a first high-voltage cable and a second high-voltage cable;

[0012] One end of the first high-voltage cable is electrically connected to the high-voltage terminal, and the other end extends to the first cable tray.

[0013] The first high-voltage cable has a first bending structure, and the ratio of the bending radius of the first bending structure to the diameter of the first high-voltage cable is between 12 and 18.

[0014] One end of the second high-voltage cable is electrically connected to the high-voltage terminal, and the other end extends to the second cable tray.

[0015] According to one embodiment of the present disclosure, the second high-voltage cable has a first straight section, a second bent structure, a third bent structure, and a second straight section that are electrically connected in sequence.

[0016] The first straight section is electrically connected to the high-voltage terminal.

[0017] The second straight section extends onto the second cable tray.

[0018] According to one embodiment of this disclosure, the ratio of the turning radius of the second bending structure to the diameter of the second high-voltage cable is between 12 and 18.

[0019] According to one embodiment of this disclosure, the ratio of the turning radius of the third bending structure to the diameter of the second high-voltage cable is between 8 and 10.

[0020] According to one embodiment of the present disclosure, the second high-voltage cable has a plurality of sections; wherein, the first straight sections of adjacent second high-voltage cables have a first gap.

[0021] The second straight section of the adjacent second high-voltage cable has a second gap.

[0022] According to one embodiment of this disclosure, the housing body further includes a low-voltage bracket, and the low-voltage terminal is located on the low-voltage bracket;

[0023] The second conductive part includes multiple low-voltage wire harnesses;

[0024] The plurality of low-voltage wire harnesses are electrically connected to the low-voltage terminals, and the plurality of low-voltage wire harnesses are evenly distributed along the circumference of the low-voltage bracket.

[0025] According to one embodiment of the present disclosure, the low-voltage harness includes at least one low-voltage cable, which is electrically connected to the low-voltage terminal; the low-voltage cables in a plurality of low-voltage harnesses are arranged side by side at the low-voltage terminal.

[0026] According to one embodiment of this disclosure, the low-voltage harness on the side away from the second cable tray has a fourth bending structure;

[0027] The ratio of the turning radius of the fourth bending structure to the diameter of the low-voltage cable is between 3 and 6.

[0028] According to one embodiment of this disclosure, along the second direction, the low-voltage cable is located directly above the locations of the first high-voltage cable and the second high-voltage cable.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0031] Figure 1 This is a top view of a box-type transformer according to one embodiment of the present disclosure.

[0032] Figure 2 for Figure 1 Sectional view along the AA direction.

[0033] Figure 3 This is a schematic diagram of the overall structure of the box-type transformer and the laying structure in one embodiment of the present disclosure.

[0034] Figure 4 for Figure 1 Sectional view along the BB direction.

[0035] Figure 5 This is a top view of a portion of the structure of a box-type transformer in one embodiment of the present disclosure.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Box body; 11. Low-voltage terminal; 12. High-voltage terminal; 13. Low-voltage support; 2. Laying structure; 21. First cable tray; 22. Second cable tray; 23. First conductive part; 231. First high-voltage cable; 2311. First bending structure; 232. Second high-voltage cable; 2321. First straight section; 23211. First gap; 2322. Second bending structure; 2323. Third bending structure; 2324. Second straight section; 23241. Second gap; 24. Second conductive part; 241. Low-voltage wire harness; 2411. First low-voltage wire harness; 2412. Second low-voltage wire harness; 2413. Third low-voltage wire harness; 2414. Fourth low-voltage wire harness; 24141. Fourth bending structure. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0039] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0040] In offshore photovoltaic (PV) power generation projects, various components are located at sea. The laying and layout of internal cables, especially for the box-type transformers used for power conversion, presents significant challenges, leading to relatively high difficulties in cable installation. Therefore, efficiently and safely laying cables for the box-type transformers within offshore PV projects to improve power generation efficiency is a key engineering focus.

[0041] Based on this, see Figure 1 , Figure 2 , Figure 3This disclosure provides a cable laying structure 2 for a marine photovoltaic box-type transformer. The box-type transformer includes a box body 1. The box body 1 has a low-voltage terminal 11 and a high-voltage terminal 12. The laying structure 2 includes a first cable tray 21, a second cable tray 22, a first conductive part 23, and a second conductive part 24. The first cable tray 21 and the second cable tray 22 are respectively disposed on both sides of the box body 1, and the first cable tray 21 and the second cable tray 22 are symmetrically arranged about a first direction about the box body 1. The first conductive part 23 is electrically connected to the high-voltage terminal 12. A portion of the first conductive part 23 is located on the first cable tray 21 on the side away from the high-voltage terminal 12, and the remaining portion of the first conductive part 23 is located on the second cable tray 22 on the side away from the high-voltage terminal 12. The second conductive part 24 is electrically connected to the low-voltage terminal 11.

[0042] It is understandable that in offshore photovoltaic projects, the role of a box-type transformer is to reduce the high voltage generated by the photovoltaic structure to a low voltage, and then transmit the low voltage to the electrical equipment for normal operation. It should be noted that box-type transformers are well known to those skilled in the art, and the specific structure of the box-type transformer will not be described in detail in this disclosure.

[0043] The high-voltage terminal 12 is electrically connected to the first conductive part 23 that transmits high voltage, that is, the first conductive part 23 is electrically connected to the photovoltaic structure and is used to transmit the high voltage generated by the photovoltaic structure to the main body 1 of the box; the low-voltage terminal 11 is electrically connected to the second conductive part 24 that transmits low voltage, that is, the low-voltage terminal 11 is used to transmit the low voltage converted by the main body 1 of the box to the electrical equipment.

[0044] In this embodiment, the first conductive part 23 is connected to the photovoltaic structure, transmitting the high voltage generated by the photovoltaic structure to the main body 1. The main body 1 steps down the high voltage transmitted by the first conductive part 23 and connects the low voltage to the electrical equipment via the second conductive part 24 through the low voltage terminal 11, thereby utilizing the electrical energy generated by the photovoltaic structure. Simultaneously, part of the first conductive part 23 is located on the first cable tray 21, and the remaining part is located on the second cable tray 22, allowing for a reasonable arrangement of the first conductive part 23.

[0045] Furthermore, in this embodiment, the box body 1 can be configured as a cuboid, and the first direction of the box body 1 refers to the length direction of the box body 1. It should be noted that in other embodiments, the box body 1 can be of other shapes, which will not be elaborated upon in this application.

[0046] In some embodiments of this disclosure, see Figure 3 , Figure 4 , Figure 5The first conductive part 23 includes a first high-voltage cable 231 and a second high-voltage cable 232. One end of the first high-voltage cable 231 is electrically connected to the high-voltage terminal 12, and the other end of the first high-voltage cable 231 extends to the first cable tray 21. The first high-voltage cable 231 has a first bending structure 2311, and the ratio of the bending radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 is between 12 and 18. For example, the ratio of the bending radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 can be 12, 14, 16, or 18, etc. It should be noted that in other embodiments, the ratio of the bending radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 is not limited to this. One end of the second high-voltage cable 232 is electrically connected to the high-voltage terminal 12, and the other end extends to the second cable tray 22.

[0047] As described above, by setting the ratio of the turning radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 between 12 and 18, on the one hand, the first high-voltage cable 231 can form a larger space to facilitate subsequent cable laying; on the other hand, in the presence of large waves at sea, if the ratio of the turning radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 is set too large, part of the first high-voltage cable 231 will dangle between the first cable tray 21 and the second cable tray 22, affecting the overall stability of the laying structure 2 in windy and wavery weather; if the ratio of the turning radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 is set too small, the first high-voltage cable 231 will be too taut, thus making the first high-voltage cable 231 prone to breakage.

[0048] In this embodiment, see Figure 5 The second high-voltage cable 232 has a first straight section 2321, a second bending structure 2322, a third bending structure 2323 and a second straight section 2324 that are electrically connected in sequence; wherein, the first straight section 2321 is electrically connected to the high-voltage terminal 12; and the second straight section 2324 extends to the second cable tray 22.

[0049] As an example, the ratio of the turning radius of the second bending structure 2322 to the diameter of the second high-voltage cable 232 is between 12 and 18. For example, the ratio of the turning radius of the second bending structure 2322 to the diameter of the second high-voltage cable 232 can be 12, 14, 16, or 18, etc. It should be noted that in other embodiments, the ratio of the turning radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231 is not limited to this.

[0050] In some examples, the first high-voltage cable 231 and the second high-voltage cable 232 have the same diameter, but the ratio of the turning radius of the second bending structure 2322 to the diameter of the second high-voltage cable 232 can be greater than the ratio of the turning radius of the first bending structure 2311 to the diameter of the first high-voltage cable 231. This arrangement allows for a certain gap between the first high-voltage cable 231 and the second high-voltage cable 232, facilitating their laying while preventing mutual interference. It also provides greater convenience for subsequent maintenance (e.g., allowing for accurate and rapid identification of damaged cables).

[0051] As another example, see Figure 5 The ratio of the turning radius of the third bending structure 2323 to the diameter of the second high-voltage cable 232 is between 8 and 10. For example, the ratio of the turning radius of the third bending structure 2323 to the diameter of the second high-voltage cable 232 can be 8, 9, or 10. It should be noted that in other embodiments, the ratio of the turning radius of the third bending structure 2323 to the diameter of the second high-voltage cable 232 is not limited to this.

[0052] In some embodiments, the ratio of the turning radius of the second bending structure 2322 to the diameter of the second high-voltage cable 232 is greater than the ratio of the turning radius of the third bending structure 2323 to the diameter of the second high-voltage cable 232. This arrangement allows the second high-voltage cable 232 to be better positioned between the first cable tray 21 and the second cable tray 22, thus improving the protection of the second high-voltage cable 232. Simultaneously, when the ratio of the turning radius of the second bending structure 2322 to the diameter of the second high-voltage cable 232 is greater than the ratio of the turning radius of the third bending structure 2323 to the diameter of the second high-voltage cable 232, the second straight section 2324 can be more easily positioned on the second cable tray 22, reducing the number of steps required for worker operation and thereby improving the efficiency of cable laying.

[0053] In some embodiments of this disclosure, see Figure 5The second high-voltage cable 232 has multiple sections; wherein, the first straight section 2321 of adjacent second high-voltage cables 232 has a first gap 23211; and the second straight section 2324 of adjacent second high-voltage cables 232 has a second gap 23241. With this arrangement, in this embodiment, the first straight section 2321 is electrically connected to the high-voltage terminal 12, and the adjacent first straight sections 2321 of adjacent second high-voltage cables 232 are positioned far apart to prevent interference between adjacent second high-voltage cables 232; and the second straight section 2324 is electrically connected to the photovoltaic structure, and the adjacent second straight sections 2324 of adjacent second high-voltage cables 232 are positioned far apart to prevent interference between adjacent second high-voltage cables 232. This ensures a reasonable arrangement of cables electrically connected to the box-type transformer while improving the safety factor of the box-type transformer.

[0054] As an example, two second high-voltage cables 232 can be provided. It should be noted that in other examples, the number of second high-voltage cables 232 is not limited to this, and this disclosure will not elaborate on this aspect.

[0055] In some embodiments of this disclosure, see Figure 2 , Figure 5 The enclosure body 1 also includes a low-voltage bracket 13, wherein the axial direction of the low-voltage bracket 13 is the same as the height direction of the enclosure body 1; a low-voltage terminal 11 is disposed on the low-voltage bracket 13; the second conductive part 24 includes a plurality of low-voltage wire harnesses 241; the plurality of low-voltage wire harnesses 241 are electrically connected to the low-voltage terminal 11, and the plurality of low-voltage wire harnesses 241 are evenly distributed along the circumference of the low-voltage bracket 13. With this configuration, when the enclosure body 1 converts the high voltage transmitted from the first conductive part 23 into a low voltage and applies it to the low-voltage terminal 11, the low-voltage terminal 11 can transmit the low voltage through the second conductive part 24 to the electrical equipment for use by the electrical equipment. In this embodiment, the second structure is configured with a plurality of low-voltage wire harnesses 241 so that it can be used by multiple electrical equipment.

[0056] As an example, the number of low-voltage harnesses 241 can be set to four, the number of low-voltage terminals 11 can be set to a multiple of four, the number of low-voltage terminals 11 is in groups of four, and the low-voltage terminals 11 of different groups are set at different heights on the low-voltage bracket 13. The four low-voltage harnesses 241 are electrically connected to the same group of low-voltage terminals 11.

[0057] See Figure 5 The following section will take four low-voltage wiring harnesses 241 as an example to introduce the low-voltage wiring harnesses 241 and the low-voltage terminals 11 in detail.

[0058] The low-voltage wiring harness 241 includes a first low-voltage wiring harness 2411, a second low-voltage wiring harness 2412, a third low-voltage wiring harness 2413, and a fourth low-voltage wiring harness 2414; wherein the first low-voltage wiring harness 2411, the second low-voltage wiring harness 2412, the third low-voltage wiring harness 2413, and the fourth low-voltage wiring harness 2414 are electrically connected to the corresponding low-voltage terminals 11.

[0059] In some embodiments of this disclosure, the low-voltage harness 241 contains at least one low-voltage cable (not specifically marked in this application), which is electrically connected to the low-voltage terminal 11; multiple low-voltage cables in the low-voltage harness 241 are arranged side by side at the low-voltage terminal 11. It should be noted that, in the embodiments of this disclosure, the number of low-voltage cables provided in the low-voltage harness 241 is not limited.

[0060] In some embodiments of this disclosure, the fourth low-voltage harness 2414 has a fourth bending structure 24141, the ratio of the bending radius of the fourth bending structure 24141 to the diameter of the low-voltage cable being between 3 and 6. For example, the ratio of the bending radius of the fourth bending structure 24141 to the diameter of the low-voltage cable can be 3, 4, 5, or 6, etc. It should be noted that in other embodiments, the ratio of the bending radius of the fourth bending structure 24141 to the diameter of the low-voltage cable is not limited to this.

[0061] It is understood that the fourth low-voltage harness 2414 refers to the low-voltage harness 241 on the side away from the second cable tray 22. In this embodiment of the present disclosure, a fourth bending structure 24141 is provided on the fourth low-voltage harness 2414. This allows the fourth low-voltage harness 2414 to bypass the support box body 1 structure, while making the overall laying structure 2 more compact and reducing the space occupied by the low-voltage harness 241. As a result, more low-voltage harnesses 241 can be arranged in the same space for more electrical equipment to use.

[0062] In some embodiments of this disclosure, see Figure 2 , Figure 4 Along the second direction, the low-voltage cable is located directly above the locations of the first high-voltage cable 231 and the second high-voltage cable 232. In other words, the low-voltage cable does not intersect with the first high-voltage cable 231 and the second high-voltage cable 232 in space. This arrangement ensures the safe operation of the laying structure 2 and also separates the low-voltage cable from the first high-voltage cable 231 and the second high-voltage cable 232, facilitating the winding and fixing of different cables.

[0063] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A cable laying structure for a marine photovoltaic box-type transformer, characterized in that, The box-type transformer includes a box body; the box body has low-voltage terminals and high-voltage terminals; The laying structure includes a first cable tray, a second cable tray, a first conductive part, and a second conductive part; The first cable tray and the second cable tray are respectively disposed on both sides of the main body of the box, and the first cable tray and the second cable tray are symmetrically arranged about the main body of the box in a first direction. The first conductive part is electrically connected to the high-voltage terminal; wherein, a portion of the first conductive part, on the side away from the high-voltage terminal, is located on the first cable tray; the remaining portion of the first conductive part, on the side away from the high-voltage terminal, is located on the second cable tray. The second conductive part is electrically connected to the low-voltage terminal.

2. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 1, characterized in that, The first conductive part includes a first high-voltage cable and a second high-voltage cable; One end of the first high-voltage cable is electrically connected to the high-voltage terminal, and the other end extends to the first cable tray. The first high-voltage cable has a first bending structure, and the ratio of the bending radius of the first bending structure to the diameter of the first high-voltage cable is between 12 and 18. One end of the second high-voltage cable is electrically connected to the high-voltage terminal, and the other end extends to the second cable tray.

3. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 2, characterized in that, The second high-voltage cable has a first straight section, a second bent structure, a third bent structure, and a second straight section that are electrically connected in sequence. The first straight section is electrically connected to the high-voltage terminal. The second straight section extends onto the second cable tray.

4. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 3, characterized in that, The ratio of the turning radius of the second bending structure to the diameter of the second high-voltage cable is between 12 and 18.

5. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 3, characterized in that, The ratio of the turning radius of the third bending structure to the diameter of the second high-voltage cable is between 8 and 10.

6. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 3, characterized in that, The second high-voltage cable has multiple sections; wherein, the first straight sections of adjacent second high-voltage cables have a first gap; The second straight section of the adjacent second high-voltage cable has a second gap.

7. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 2, characterized in that, The main body of the box also has a low-voltage bracket, and the low-voltage terminal is located on the low-voltage bracket; The second conductive part includes multiple low-voltage wire harnesses; The plurality of low-voltage wire harnesses are electrically connected to the low-voltage terminals, and the plurality of low-voltage wire harnesses are evenly distributed along the circumference of the low-voltage bracket.

8. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 7, characterized in that, The low-voltage harness contains at least one low-voltage cable, which is electrically connected to the low-voltage terminal; the low-voltage cables in the multiple low-voltage harnesses are arranged side by side at the low-voltage terminal.

9. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 8, characterized in that, The low-voltage harness on the side away from the second cable tray has a fourth bend structure; The ratio of the turning radius of the fourth bending structure to the diameter of the low-voltage cable is between 3 and 6.

10. The cable laying structure of the offshore photovoltaic box-type transformer according to claim 8, characterized in that, Along the second direction, the low-voltage cable is located directly above the locations of the first high-voltage cable and the second high-voltage cable.

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