A high-precision photoelectric combined mutual inductor for direct current power distribution network

Abstract

This invention discloses a high-precision optoelectronic combined instrument transformer for DC distribution networks, comprising: an instrument transformer body, including an outer shell, an instrument transformer housing disposed within the outer shell, and a storage slot disposed on the instrument transformer housing; a processing component, including a high-voltage side sensing module and a low-voltage side sensing module disposed within the instrument transformer housing, an optical fiber transmission channel disposed between the high-voltage side sensing module and the low-voltage side sensing module, and a processing module disposed within the instrument transformer housing; and a plug-in component disposed on the instrument transformer housing. This invention employs opto-isolation and optical fiber transmission to achieve complete electrical isolation between high and low voltage, suppressing interference and improving measurement accuracy; automatic clamping of the plug-in component enables fast and reliable wiring, reducing the risk of loosening; multi-stage vibration damping and ball joint adaptive support effectively attenuate vibration impacts, protecting the internal sensing and optical path stability.

Description

Technical Field

[0001] This invention relates to the technical field of combined instrument transformers, and more particularly to a high-precision photoelectric combined instrument transformer for DC distribution networks. Background Technology

[0002] With the rapid development of DC distribution networks, combined instrument transformers are widely used in current and voltage acquisition. Existing photoelectric instrument transformers mostly adopt a fixed wiring structure, which is prone to poor contact and lacks efficient vibration reduction measures. Under vibration environments, the optical path and sensing accuracy are easily affected, resulting in insufficient measurement stability and low wiring and maintenance efficiency.

[0003] This invention addresses the problems of poor electrical isolation, unreliable wiring, weak vibration resistance, and susceptibility to interference in existing instrument transformers. It provides a high-precision photoelectric combined instrument transformer, which solves the technical pain points of unstable measurement, inconvenient wiring, and poor vibration resistance in DC distribution networks through photoelectric transmission, quick plug-in, and multi-stage vibration reduction structure. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the high-precision photoelectric combined current transformers used in DC distribution networks, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a high-precision optoelectronic combined current transformer for DC power distribution networks.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-precision photoelectric combined instrument transformer for DC distribution networks, comprising: an instrument transformer body, including an outer shell, an instrument transformer housing disposed within the outer shell, and a storage slot disposed on the instrument transformer housing; a processing component, including a high-voltage side sensing module disposed within the instrument transformer housing, a low-voltage side sensing module, an optical fiber transmission channel disposed between the high-voltage side sensing module and the low-voltage side sensing module, and a processing module disposed within the instrument transformer housing; and a plug-in component disposed on the instrument transformer housing.

[0008] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, a DC current sensing unit and a DC voltage sensing unit are provided between the high-voltage side sensing module and the low-voltage side sensing module. The DC current sensing unit and the DC voltage sensing unit are connected to an optical fiber transmission channel, and the optical fiber transmission channel is connected to a processing module.

[0009] As a preferred embodiment of the high-precision photoelectric combined current transformer for DC distribution network described in this invention, the plug-in assembly includes a plug-in plate body disposed on the current transformer housing, an entry hole opened on the plug-in plate body, a plurality of drive shafts rotatably connected to the plug-in plate body, a first rotating rod rotatably connected to one end of the drive shaft near the entry hole, a second rotating rod rotatably connected to the first rotating rod, and a plug-in plate connected to the plurality of second rotating rods. The plug-in plate is provided with a plug-in hole, and the plug-in plate body is provided with a drive component.

[0010] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, the driving component includes a ring gear disposed on the plug-in disk body, a plurality of gear teeth disposed on the side of the ring gear end, a driving gear disposed on the driving shaft and meshing with the gear teeth, and a first gear rotatably connected in the transformer housing.

[0011] A damping layer is provided between the first rotating rod and the second rotating rod, and a damping layer is also provided between the first rotating rod and the drive shaft.

[0012] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, a shock-absorbing component is provided between the outer shell and the transformer housing. The shock-absorbing component includes a bracket disposed within the outer shell, a plurality of protruding rods slidably connected to the bracket, and a pressure plate disposed at the end of the protruding rods. A plurality of secondary brackets are disposed within the bracket, and a movable rod is slidably connected within the bracket. A plurality of bent plates are rotatably connected to the movable rods. The other end of the bent plate is hinged to the lower end of the protruding rod, and the middle section of the bent plate is hinged to the lower end of the secondary bracket. The movable rod extends outward from the outer shell.

[0013] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, the shock-absorbing component further includes an abutment plate disposed between the outer shell and the transformer housing, an opening on the abutment plate for the extension rod to extend, an extension rod disposed on the pressure plate, a hinged ball disposed at the end of the extension rod, and a support plate spherically connected to the hinged ball. The support plate is provided with a spherical groove that mates with the hinged ball, and a plurality of shock-absorbing springs are provided between the spherical groove and the hinged ball.

[0014] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, the support plate is hexagonal, interconnecting members are provided on the side wall of the support plate, a friction layer is provided between the support plates, and the hexagonal corners of the support plate are arc-shaped.

[0015] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, the interconnecting component includes a plurality of interconnecting blocks that are hinged end to end, a hinge seat disposed at one end of the interconnecting block, a hinge shaft disposed at the other end of the interconnecting block, a lower groove formed on the upper surface of the interconnecting block, and a mating end plate disposed on the upper end of the interconnecting block and engaging with the lower groove of another interconnecting block.

[0016] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, the movable rod has an elongated groove, a push rod is slidably connected in the elongated groove, the push rod is provided with a plurality of pushing friction teeth, and a short shaft is provided at the hinged end of the bent plate and the movable rod, and a cooperating cam is provided on the short shaft to cooperate with the pushing friction teeth.

[0017] As a preferred embodiment of the high-precision photoelectric combined transformer for DC distribution network described in this invention, the surface of the support plate is provided with a pad layer.

[0018] The beneficial effects of this invention are as follows: When the equipment is working, the DC current sensing unit and the DC voltage sensing unit simultaneously collect the primary side signal and convert it into an optical signal, which is then sent to the processing module via the optical fiber transmission channel. The processing module completes demodulation, amplification, calculation and output, realizing high-precision measurement of DC distribution network current and voltage. The external wiring connector is inserted through the inlet hole and automatically clamped by the plug plate, ensuring stable and reliable contact. The shock absorption component absorbs external vibration and impact in real time, ensuring stable operation of the internal optical path and circuit, reducing electromagnetic interference and mechanical interference, and improving the long-term operational stability and service life of the transformer. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of the high-precision photoelectric combined transformer for DC power distribution networks according to the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the high-precision photoelectric combined transformer for DC power distribution networks according to the present invention.

[0022] Figure 3 for Figure 2 Enlarged diagram of part A in the middle.

[0023] Figure 4This is a schematic diagram of the plug-in assembly of the high-precision photoelectric combined transformer for DC power distribution networks according to the present invention.

[0024] Figure 5 This is a schematic diagram of the overall vibration damping component of the high-precision photoelectric combined transformer for DC power distribution networks according to the present invention.

[0025] Figure 6 This is a schematic diagram of the support structure of the high-precision photoelectric combined current transformer for DC power distribution networks according to the present invention.

[0026] Figure 7 This is an enlarged schematic diagram of the internal structure of the long slot of the high-precision photoelectric combined transformer for DC power distribution networks according to the present invention.

[0027] Figure 8 This is an exploded view of the tray structure of the high-precision photoelectric combined transformer for DC power distribution networks according to the present invention.

[0028] Figure 9 This is a schematic diagram of a single interconnecting component of the high-precision optoelectronic combined current transformer for DC power distribution networks according to the present invention.

[0029] Explanation of reference numerals in the attached drawings: 100, transformer body; 101, outer casing; 102, transformer housing; 103, storage slot; 200, processing component; 201, high-voltage side sensing module; 202, low-voltage side sensing module; 203, fiber optic transmission channel; 204, processing module; 205, DC current sensing unit; 206, DC voltage sensing unit; 300, plug-in assembly; 301, plug-in plate; 302, entry hole; 303, drive shaft; 304, first rotating rod; 305, second rotating rod; 306, plug-in plate; 307, plug-in hole; 308, plug rod; 400, driving component; 401, ring gear; 4 02. Gear teeth; 403. Drive gear; 404. First gear; 501. Bracket; 502. Extending rod; 503. Pressure plate; 504. Secondary bracket; 505. Movable rod; 506. Bending plate; 5011. Abutment plate; 5012. Opening; 5013. Extension rod; 5014. Hinge ball; 5015. Support plate; 5017. Shock-absorbing spring; 600. Interconnecting parts; 601. Interconnecting block; 602. Hinge seat; 603. Hinge shaft; 604. Lower groove; 605. Mating end plate; 606. Long groove; 607. Push rod; 608. Pushing friction tooth; 609. Short shaft; 610. Mating cam. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Example 1

[0035] Reference Figures 1-9 The first embodiment of the present invention provides a high-precision photoelectric combined current transformer for DC distribution networks, including a current transformer body 100, a processing component 200, a plug-in component 300, and a shock-absorbing component. The components cooperate with each other to form a measurement structure that integrates high-precision acquisition, photoelectric isolation transmission, fast plug-in, and multi-level shock absorption.

[0036] Furthermore, in this embodiment, the current transformer body 100 includes an outer casing 101, a current transformer housing 102 disposed within the outer casing 101, and a storage slot 103 disposed on the current transformer housing 102. The outer casing 101 is made of insulating engineering plastic, which can isolate external electric fields and mechanical shocks. The current transformer housing 102 is made of metal shielding, which can reduce the impact of external electromagnetic interference on the internal sensing unit. The storage slot 103 adopts a concave structure for centrally arranging wiring terminals, fiber optic interfaces, and signal sockets, making external wiring neat and orderly and reducing wiring interference.

[0037] Furthermore, the processing component 200 includes a high-voltage side sensing module 201, a low-voltage side sensing module 202, an optical fiber transmission channel 203 disposed within the transformer housing 102, and a processing module 204 disposed within the transformer housing 102. The high-voltage side sensing module 201 is arranged close to the primary high-voltage conductor and is used to collect primary current and voltage information. The low-voltage side sensing module 202 is arranged close to the secondary output circuit and is used to realize signal isolation and level conversion.

[0038] The fiber optic transmission channel 203 uses multimode fiber optic transmission, enabling complete electrical isolation between high and low voltage levels and blocking ground potential differences and interference signal transmission. The processing module 204 integrates an MCU and signal amplification circuit, capable of performing optical signal demodulation, digital calculation, error correction, and standard signal output, thereby improving measurement stability and accuracy.

[0039] Preferably, a DC current sensing unit 205 and a DC voltage sensing unit 206 are disposed between the high-voltage side sensing module 201 and the low-voltage side sensing module 202. The DC current sensing unit 205 employs a magneto-optical effect sensing structure, exhibiting no insertion loss and a fast response speed. The DC voltage sensing unit 206 employs an electro-optic modulation structure, possessing high linearity and high insulation strength. The DC current sensing unit 205 and the DC voltage sensing unit 206 respectively convert electrical signals into optical signals, which are then transmitted to the processing module 204 via the optical fiber transmission channel 203, avoiding electromagnetic interference and improving measurement accuracy.

[0040] In this embodiment, the plug-in assembly 300 includes a plug-in disk body 301 disposed in the storage slot 103, an entry hole 302 opened on the plug-in disk body 301, a plurality of drive shafts 303 rotatably connected to the plug-in disk body 301, a first rotating rod 304 rotatably connected to one end of the drive shaft 303 near the entry hole 302, a second rotating rod 305 rotatably connected to the first rotating rod 304, and a plug-in plate 306 connected to the plurality of second rotating rods 305.

[0041] The storage slot 103 includes a plate for mounting the plug-in disk 301, which is made of insulating plastic to improve safety. The inlet hole 302 is flared to facilitate the insertion of external connectors. The drive shaft 303 is evenly distributed around the circumference to achieve synchronous clamping from all sides. The first rotating rod 304 and the second rotating rod 305 form a linkage mechanism. A plug-in hole 307 is provided on the plug-in plate 306, and a conductive spring is provided on the inner wall of the plug-in hole 307 to ensure tight contact with the connector and reduce contact resistance.

[0042] Furthermore, a driving component 400 is provided on the plug-in disc body 301. In this embodiment, the driving component 400 includes a ring gear 401 disposed on the plug-in disc body 301, a plurality of gear teeth 402 disposed on the end side of the ring gear 401, a driving gear 403 disposed on the drive shaft 303 and meshing with the gear teeth 402, and a first gear 404 rotatably connected in the transformer housing 102. The first gear 404 is driven by a micro motor and can drive the ring gear 401 to rotate synchronously. The ring gear 401 simultaneously drives multiple driving gears 403 to rotate, realizing the synchronous action of multiple sets of linkages, thereby driving the first rotating rod 304 and the second rotating rod 305 to rotate upward and downward, thereby driving the plug-in disc body 301 to move up and down. In the initial position, the plug-in disc body 301 is located at the top. When plugging, the plug rod 308 is inserted into the plugging hole 307, and then the plug-in disc body 301 is driven to move downward, and then finally moves to the plugging end position.

[0043] A damping layer is provided between the first rotating rod 304 and the second rotating rod 305, and a damping layer is also provided between the first rotating rod 304 and the drive shaft 303. The damping layer is made of elastic damping material, which can slow down the movement speed of the connecting rod, avoid impact damage to the joint, and maintain the self-locking state after clamping to prevent loosening.

[0044] Furthermore, a shock-absorbing component is provided between the outer casing 101 and the transformer housing 102. In this embodiment, the shock-absorbing component includes a bracket 501 disposed inside the outer casing 101, a plurality of extension rods 502 slidably connected to the bracket 501, and a pressure plate 503 disposed at the end of the extension rods 502. The bracket 501 adopts a rigid metal frame to provide stable support for the shock-absorbing structure. The extension rods 502 are arranged radially along the bracket 501 and move in the same direction. The pressure plate 503 adopts an arc-shaped structure and can fit with the outer contour.

[0045] Preferably, a plurality of secondary supports 504 are provided inside the support 501, and a movable rod 505 is slidably connected inside the support 501. A plurality of bent plates 506 are rotatably connected to the movable rod 505. The other end of the bent plate 506 is hinged to the lower end of the extension rod 502, and the middle section of the bent plate 506 is hinged to the lower end of the secondary supports 504. The bent plate 506 forms a lever transmission structure, which can convert the horizontal thrust of the movable rod 505 into the radial thrust of the extension rod 502, resulting in high transmission efficiency and stable operation.

[0046] Furthermore, the shock-absorbing components also include an abutment plate 5011 disposed between the outer casing 101 and the transformer casing 102, an opening 5012 formed in the abutment plate 5011 for the extension rod 502 to extend out, an extension rod 5013 disposed on the pressure plate 503, a hinged ball 5014 disposed at the end of the extension rod 5013, and a support plate 5015 connected to the hinged ball 5014. The abutment plate 5011 is an elastic plate that can distribute pressure and avoid local stress concentration.

[0047] The opening 5012 is used to avoid the extension rod 502, ensuring smooth movement. The extension rod 5013 is used to transmit pressure to the support plate 5015, and a spherical groove (not shown in the figure) is provided at the lower end of the support plate 5015. The hinged ball 5014 and the spherical groove on the support plate 5015 form a ball-joint connection, which can adapt to the tilt and deformation of the current transformer housing 102 and always maintain a close fit. Several shock-absorbing springs 5017 are provided between the spherical groove and the hinged ball 5014. The shock-absorbing springs 5017 are miniature compression springs, which can absorb high-frequency vibration and impact and reduce the transmission of vibration to the current transformer housing 102.

[0048] Furthermore, the support plate 5015 is hexagonal, enabling multi-directional wrapping support. Interconnecting parts 600 are provided on the side walls of the support plate 5015, and a friction layer is provided between the support plates 5015. The friction layer is made of rubber-like material, which can increase the friction between adjacent support plates 5015 and prevent relative slippage. The hexagonal corners of the support plate 5015 are rounded to avoid stress concentration at sharp corners and improve the service life of the structure.

[0049] Furthermore, in this embodiment, the interconnecting component 600 includes a plurality of interconnecting blocks 601 that are hinged end to end, a hinge seat 602 disposed at one end of the interconnecting block 601, a hinge shaft 603 disposed at the other end of the interconnecting block 601, a lower groove 604 formed on the upper surface of the interconnecting block 601, and a mating end plate 605 disposed on the upper end of the interconnecting block 601 and engaging with the lower groove 604 of another interconnecting block 601. The interconnecting blocks 601 are hinged together to form a flexible linkage structure, which can expand and retract synchronously with the support plate 5015. The lower groove 604 and the mating end plate 605 fit together to improve the connection sealing and integrity, reduce loosening caused by gaps, and make the shock absorption effect more uniform and stable.

[0050] Furthermore, an elongated groove 606 is formed within the movable rod 505, and a push rod 607 is slidably connected within the groove 606. The push rod 607 also extends outward along with the movable rod 505. Several pushing friction teeth 608 are provided on the push rod 607. A short shaft 609 is provided at the hinged end of the bending plate 506 and the movable rod 505. The number of pushing friction teeth 608 corresponds one-to-one with the number of short shafts 609. A mating cam 610 is provided on the short shaft 609 to engage with the pushing friction teeth 608. The push rod 607 can be finely adjusted along the elongated groove 606. By engaging the pushing friction teeth 608 with the mating cam 610, the swing angle of the bending plate 506 can be precisely adjusted, thereby achieving fine adjustment of the extension length of the extension rod 502, improving the clamping positioning accuracy, and ensuring moderate clamping force.

[0051] Preferably, the short shaft 609 can be pushed up to a certain height by the friction teeth 608 within the long groove 606, but is still confined within the long groove 606, and can be driven by the movement of the movable rod 505, thereby causing it to rotate.

[0052] Furthermore, a pad is provided on the surface of the tray 5015. The pad is made of foamed elastic insulating material, which is soft and has good resilience. It can further buffer pressure and absorb vibration, while protecting the surface of the transformer housing 102 from scratches and improving the fit, sealing and shock absorption effect.

[0053] Working process: When subjected to minor external vibrations, push rod 607 is pushed and moves horizontally along bracket 501. Push rod 607 moves synchronously with friction tooth 608, pushing friction tooth 608 to engage with cam 610 on short shaft 609, causing bending plate 506 to swing around secondary bracket 504. When subjected to major external vibrations, movable rod 505 is pushed simultaneously, causing all bending plates 506 to rotate. This causes the upper end of all bending plates 506 to push extension rod 502 to extend radially along bracket 501. Extension rod 502 transmits thrust to support plate 5015 through pressure plate 503, extension rod 5013, and hinged ball 5014, pressing support plate 5015 towards transformer housing 102. Support plate 5015 adaptively conforms to housing surface under the action of pad and damping spring 5017, forming a ring-shaped support. When external vibrations occur, the vibrations are progressively attenuated through the outer casing 101, bracket 501, bending plate 506, extension rod 502, hinged ball 5014, damping spring 5017, support plate 5015, and padding layer. The vibration energy transmitted to the transformer housing 102 is significantly reduced, ensuring the internal sensing unit and fiber optic transmission channel 203 remain stable and guaranteeing measurement accuracy unaffected by vibration. The interconnecting component 600 keeps the support plates 5015 moving synchronously, and the friction layer suppresses relative sliding, forming a stable, continuous, and uniform multi-stage damping system that maintains its damping effect over a long period.

[0054] When the equipment is working, the DC current sensing unit 205 and the DC voltage sensing unit 206 simultaneously collect the primary side signal and convert it into an optical signal. The signal is then sent to the processing module 204 via the optical fiber transmission channel 203. The processing module 204 performs demodulation, amplification, calculation, and output to achieve high-precision measurement of the DC distribution network current and voltage. The external wiring connector is inserted through the inlet hole 302 and automatically clamped by the plug plate 306, ensuring stable and reliable contact. The shock absorption components absorb external vibrations and impacts in real time, ensuring stable operation of the internal optical path and circuit, reducing electromagnetic interference and mechanical interference, and improving the long-term operational stability and service life of the transformer.

[0055] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. Any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended protection.

[0056] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0057] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A high-precision optical-electrical combined mutual inductor for direct current power distribution network, characterized in that: include: The transformer body (100) includes an outer shell (101), a transformer housing (102) disposed inside the outer shell (101), and a storage slot (103) disposed on the transformer housing (102). The processing component (200) includes a high-voltage side sensing module (201), a low-voltage side sensing module (202) disposed in the transformer housing (102), an optical fiber transmission channel (203) disposed between the high-voltage side sensing module (201) and the low-voltage side sensing module (202), and a processing module (204) disposed in the transformer housing (102). A plug-in assembly (300) is disposed on the transformer housing (102).

2. The high-precision optical and electrical combined transformer for a direct current distribution network of claim 1, characterized in that: A DC current sensing unit (205) and a DC voltage sensing unit (206) are provided between the high-voltage side sensing module (201) and the low-voltage side sensing module (202). The DC current sensing unit (205) and the DC voltage sensing unit (206) are connected to the optical fiber transmission channel (203), and the optical fiber transmission channel (203) is connected to the processing module (204).

3. The high-precision optical and electrical combined transformer for a direct current distribution network according to claim 2, characterized in that: The plug-in assembly (300) includes a plug-in plate (301) disposed on the outer shell (101), an inlet hole (302) opened on the plug-in plate (301), a plurality of drive shafts (303) rotatably connected to the plug-in plate (301), a first rotating rod (304) rotatably connected to one end of the drive shaft (303) near the inlet hole (302), a second rotating rod (305) rotatably connected to the first rotating rod (304), and a plug-in plate (306) connected to the plurality of second rotating rods (305). The plug-in plate (306) is provided with a plug-in hole (307). The plug-in plate (301) is provided with a drive member (400). The lower end of the transformer housing (102) is provided with a plug rod (308).

4. The high-precision photoelectric combined current transformer for DC distribution networks as described in claim 3, characterized in that: The drive unit (400) includes a ring gear (401) disposed on the plug-in plate body (301), a plurality of gear teeth (402) disposed on the side of the end of the ring gear (401), a drive gear (403) disposed on the drive shaft (303) and meshing with the gear teeth (402), and a first gear (404) rotatably connected in the transformer housing (102). A damping layer is provided between the first rotating rod (304) and the second rotating rod (305), and a damping layer is also provided between the first rotating rod (304) and the drive shaft (303).

5. The high-precision photoelectric combined transformer for DC distribution networks as described in claim 1, characterized in that: A shock-absorbing component is provided between the outer shell (101) and the transformer housing (102). The shock-absorbing component includes a bracket (501) disposed inside the outer shell (101), a plurality of extension rods (502) slidably connected to the bracket (501), and a pressure plate (503) disposed at the end of the extension rods (502). A plurality of sub-braces (504) are disposed inside the bracket (501). A movable rod (505) is slidably connected inside the bracket (501). A plurality of bending plates (506) are rotatably connected to the movable rod (505). The other end of the bending plate (506) is hinged to the lower end of the extension rod (502). The middle section of the bending plate (506) is hinged to the lower end of the sub-braces (504). The movable rod (505) extends outward from the outer shell (101).

6. The high-precision photoelectric combined transformer for DC distribution networks as described in claim 5, characterized in that: The shock-absorbing component also includes an abutment plate (5011) disposed between the outer shell (101) and the transformer shell (102), an opening (5012) on the abutment plate (5011) for the extension rod (502) to extend out, an extension rod (5013) disposed on the pressure plate (503), a hinged ball (5014) disposed at the end of the extension rod (5013), and a support plate (5015) spherically connected to the hinged ball (5014). The support plate (5015) is provided with a spherical groove that mates with the hinged ball (5014), and a plurality of shock-absorbing springs (5017) are provided between the spherical groove and the hinged ball (5014).

7. The high-precision photoelectric combined transformer for DC distribution networks as described in claim 6, characterized in that: The pallet (5015) is hexagonal, and an interconnecting member (600) is provided on the side wall of the pallet (5015). A friction layer is provided between the pallets (5015) and the hexagonal corners of the pallet (5015) are arc-shaped.

8. The high-precision photoelectric combined transformer for DC distribution networks as described in claim 7, characterized in that: The interconnecting component (600) includes a plurality of interconnecting blocks (601) that are hinged together end to end, a hinge seat (602) disposed at one end of the interconnecting block (601), a hinge shaft (603) disposed at the other end of the interconnecting block (601), a lower groove (604) formed on the upper surface of the interconnecting block (601), and a mating end plate (605) disposed on the upper end of the interconnecting block (601) and mating with the lower groove (604) of another interconnecting block (601).

9. The high-precision photoelectric combined transformer for DC distribution networks as described in claim 5, characterized in that: The movable rod (505) has an elongated groove (606) inside, and a push rod (607) is slidably connected inside the elongated groove (606). The push rod (607) is provided with a plurality of pushing friction teeth (608). The bent plate (506) is hinged to the movable rod (505) and a short shaft (609) is provided at one end. The short shaft (609) is provided with a mating cam (610) that cooperates with the pushing friction teeth (608).

10. The high-precision photoelectric combined transformer for DC distribution networks as described in claim 6, characterized in that: The surface of the tray (5015) is provided with a padding layer.

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