Platform integrated flow limiter

Abstract

The invention provides a platform integrated current limiter which comprises a high-potential platform, a current limiting reactor, a fast switch, a control unit, an isolation transformer and an optical fiber insulator, the current limiting reactor, the fast switch, the control unit, the isolation transformer and the optical fiber insulator are arranged on the high-potential platform, and the current limiting reactor and the fast switch are connected in parallel. The current-limiting reactor is used for limiting short-circuit current when a line fault occurs, the quick switch is used for closing or opening the line so that the current-limiting reactor can exit from or be put into the line, the control unit is used for collecting equipment parameters and receiving ground control signals, and the isolation transformer is used for transmitting a ground potential power supply to the high-potential platform. The optical fiber insulator is used for communication between the high-potential platform and the ground. According to the application, the equipment is all integrated to a high-potential platform, the integration level is high, the expandability is good, the projection area occupied by the equipment is reduced, the reliability is improved, the current limiting reactor and the quick switch are connected in parallel, a long insulating pull rod is not needed, and the structure is simple.

Description

Technical Field

[0001] This application relates to the field of fault current limiter technology, and more specifically, to a platform-integrated current limiter. Background Technology

[0002] With economic development and social progress, the power system is now characterized by large generating units, ultra-high voltage, heavy loads, and an increasingly robust grid structure. To meet the growing demands for power quality, regional power grids are widely interconnected, the capacity of medium- and low-voltage transformers is constantly increasing, and the penetration rate of distributed power sources in the distribution system is gradually rising. In many regions, especially in economically developed coastal areas, the short-circuit current levels of the power grid are approaching or even exceeding the maximum permissible short-circuit current levels stipulated in power regulations, posing a serious threat to the safe and stable operation of the power system and becoming one of the key technical challenges.

[0003] The fault current limiter presents zero or low impedance when the system is normal, but its impedance increases rapidly when a fault occurs in the system, limiting the peak short-circuit current and steady-state short-circuit current, thereby achieving a short-circuit current level lower than the breaking capacity of the high-voltage circuit breaker. It is an economical and efficient solution to the problem of excessive short-circuit current.

[0004] Currently, fault current limiters using fast-switching parallel current-limiting reactors have been applied, mainly in the medium-voltage field. Their application in high-voltage, especially ultra-high-voltage, fields is relatively limited. However, there is a broad market prospect for such high-voltage fault current limiters, and there is an urgent need to research more economical, reliable, and compact high-voltage fault current limiters. Summary of the Invention

[0005] In view of one of the defects in the prior art, the purpose of this application is to provide a platform-integrated current limiter.

[0006] A first aspect of this application provides a platform-integrated current limiter, comprising: a high-potential platform, a current-limiting reactor, a fast switch, a control unit, an isolation transformer, and an optical fiber insulator. The current-limiting reactor, the fast switch, the control unit, the isolation transformer, and the optical fiber insulator are disposed on the high-potential platform. The current-limiting reactor and the fast switch are connected in parallel. The current-limiting reactor is used to limit short-circuit current during line faults. The fast switch is used to close or open the circuit to allow the current-limiting reactor to be disconnected from or connected to the line. The control unit is used to collect equipment parameters and receive control signals from the ground. The isolation transformer is used to transmit ground potential power to the high-potential platform. The optical fiber insulator is used for communication between the high-potential platform and the ground.

[0007] Optionally, the high-potential platform is used to support the current-limiting reactor, the fast switch, the control unit, the isolation transformer, and the optical fiber insulator; The high-potential platform includes a first base, a second base, a first post insulator assembly, a second post insulator assembly, a first inclined cable insulator assembly, a second inclined cable insulator assembly, and a platform frame. One end of the first post insulator assembly is fixedly connected to the first base, and the other end of the first post insulator assembly is fixedly connected to the bottom of the platform frame. One end of the second post insulator assembly is fixedly connected to the second base, and the other end of the second post insulator assembly is fixedly connected to the bottom of the platform frame. One end of the first inclined cable insulator assembly is fixedly connected to the first base, and the other end of the first inclined cable insulator assembly is fixedly connected to the bottom of the platform frame. One end of the second inclined cable insulator assembly is fixedly connected to the second base, and the other end of the second inclined cable insulator assembly is fixedly connected to the bottom of the platform frame. The first post insulator assembly and the second post insulator assembly are arranged parallel to each other, and the first inclined cable insulator assembly and the second inclined cable insulator assembly are arranged intersectingly.

[0008] Optionally, the high-potential platform further includes a fence and a ladder. The fence is disposed on the top of the platform frame around the edge of the platform frame. One end of the ladder is fixedly connected to the side of the fence, and the other end of the ladder extends to the ground and is fixed to the ground.

[0009] Optionally, the first post insulator assembly includes a plurality of post insulators connected end-to-end, and the second post insulator assembly includes a plurality of post insulators connected end-to-end.

[0010] Optionally, the current-limiting reactor is disposed on the top of the platform frame and inside the fence. The current-limiting reactor includes a reactor coil and a reactor insulator. The reactor insulator is fixed on the top of the platform frame, and the reactor coil is fixed on the top of the reactor insulator.

[0011] Optionally, the quick switch is disposed at the top of the platform frame and inside the enclosure. The quick switch includes a porcelain bushing, a vacuum interrupter, and an operating mechanism. The porcelain bushing is fixed at the top of the platform frame, the vacuum interrupter is disposed inside the porcelain bushing, and the operating mechanism is disposed at the bottom of the vacuum interrupter. The operating mechanism is fixedly connected to the vacuum interrupter.

[0012] Optionally, the control unit is located on top of the platform frame and inside the fence, and the control unit is also used to control the fast switch to close or open according to the control signal from the ground.

[0013] Optionally, the isolation transformer is located below the platform frame. The isolation transformer includes a composite bushing, windings, and an iron core. The windings and the iron core include a metal shell, windings, and an iron core. The windings and the iron core are located inside the metal shell. The windings are wound on the iron core. The composite bushing is installed on the top of the metal shell. The composite bushing and the metal shell are filled with insulating gas.

[0014] Optionally, one end of the optical fiber insulator is fixedly connected to the bottom of the platform frame, and the other end of the optical fiber insulator is connected to the ground.

[0015] Optionally, a communication optical fiber is pre-embedded inside the optical fiber insulator, and the inside of the optical fiber insulator is filled with adhesive.

[0016] The integrated platform current limiter of this application integrates a current-limiting reactor, a fast switch, a control unit, an isolation transformer, and fiber optic insulators, all mounted on a high-potential platform. This design offers high integration, good scalability, reduced equipment footprint, and improved reliability. Furthermore, the parallel connection of the current-limiting reactor and fast switch eliminates the need for long insulating rods, resulting in a simple structure, convenient operation, reduced insulation failure risk, and avoidance of mechanical failure hazards. This also lowers equipment costs and installation difficulty, enhances reliability, and allows for applications across multiple voltage levels, making it suitable for short-circuit current limiting in ultra-high voltage applications.

[0017] Other technical effects resulting from the additional features will be further illustrated in the corresponding embodiments. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of a platform-integrated current limiter according to an exemplary embodiment.

[0019] Figure 2 This is a schematic diagram of the structure of a high-potential platform according to an exemplary embodiment.

[0020] In the diagram: 100. Integrated platform current limiter; 1. High-potential platform; 2. Current-limiting reactor; 3. Fast switch; 4. Control unit; 5. Isolation transformer; 6. Fiber optic insulator; 11. First base; 12. Second base; 13. First post insulator assembly; 14. Second post insulator assembly; 15. First inclined cable insulator assembly; 16. Second inclined cable insulator assembly; 17. Platform frame; 18. Fence; 19. Ladder; 21. Reactor coil; 22. Reactor insulator; 31. Porcelain bushing; 32. Vacuum interrupter; 33. Operating mechanism; 51. Composite bushing; 52. Winding and core. Detailed Implementation

[0021] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0022] In the description of the embodiments of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] In the description of the embodiments in this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or devices.

[0026] The increasing penetration rate of distributed power sources in existing power distribution systems has led to short-circuit current levels in some areas approaching or even exceeding the maximum permissible short-circuit current levels stipulated in power regulations, affecting the safe and stable operation of the power system. Existing fault current limiters using fast-switching parallel current-limiting reactors are mainly used in medium-voltage applications, with limited use in high-voltage and ultra-high-voltage systems, and are also costly and require a large footprint. Based on these issues, this application provides a platform-integrated current limiter to address these problems.

[0027] Figure 1 This is a schematic diagram of the overall structure of a platform-integrated current limiter according to an exemplary embodiment.

[0028] Reference Figure 1 As shown in one embodiment of this application, a platform-integrated current limiter 100 includes: a high-potential platform 1, a current-limiting reactor 2, a fast switch 3, a control unit 4, an isolation transformer 5, and an optical fiber insulator 6.

[0029] The current-limiting reactor 2, fast switch 3, control unit 4, isolation transformer 5, and fiber optic insulator 6 are installed on the high-potential platform 1. The current-limiting reactor 2 and fast switch 3 are connected in parallel. The current-limiting reactor 2 is used to limit the short-circuit current when the line is faulty. The fast switch 3 is used to close or open the line to realize the current-limiting reactor 2 being disconnected or connected to the line. The control unit 4 is used to collect equipment parameters and receive control signals from the ground. The isolation transformer 5 is used to transmit the ground potential power to the high-potential platform 1. The fiber optic insulator 6 is used for communication between the high-potential platform 1 and the ground.

[0030] In the above embodiments of this application, the current-limiting reactor 2, fast switch 3, control unit 4, isolation transformer 5, and fiber optic insulator 6 are all mounted on the high-potential platform 1, resulting in high integration and good scalability. This reduces the projected area of ​​the equipment, improves reliability, and the parallel connection of the current-limiting reactor 2 and fast switch 3 eliminates the need for long insulating rods. This simplifies the structure, facilitates operation, reduces the risk of insulation failure, avoids potential mechanical failures, lowers equipment costs and installation difficulty, and improves reliability. It can be extended to multiple voltage levels and is suitable for short-circuit current limiting in ultra-high voltage applications.

[0031] Figure 2 This is a schematic diagram of the structure of a high-potential platform according to an exemplary embodiment.

[0032] Reference Figure 2 As shown, in order to realize applications in high voltage or even ultra-high voltage situations, in some specific embodiments of this application, the high potential platform 1 is used to support the current limiting reactor 2, the fast switch 3, and the control unit 4.

[0033] Specifically, the current-limiting reactor 2, the fast switch 3, and the control unit 4 are located on top of the high-potential platform 1.

[0034] The high-potential platform 1 includes a first base 11, a second base 12, a first post insulator assembly 13, a second post insulator assembly 14, a first inclined cable insulator assembly 15, a second inclined cable insulator assembly 16, and a platform frame 17.

[0035] Specifically, the platform frame 17 includes multiple crossbeams, which can be fixedly connected by welding. The platform frame 17 can be used to install equipment.

[0036] One end of the first post insulator assembly 13 is fixedly connected to the first base 11, and the other end of the first post insulator assembly 13 is fixedly connected to the bottom of the platform frame 17. One end of the second post insulator assembly 14 is fixedly connected to the second base 12, and the other end of the second post insulator assembly 14 is fixedly connected to the bottom of the platform frame 17. One end of the first inclined cable insulator assembly 15 is fixedly connected to the first base 11, and the other end of the first inclined cable insulator assembly 15 is fixedly connected to the bottom of the platform frame 17. One end of the second inclined cable insulator assembly 16 is fixedly connected to the second base 12, and the other end of the second inclined cable insulator assembly 16 is fixedly connected to the bottom of the platform frame 17.

[0037] The first post insulator assembly 13 and the second post insulator assembly 14 are arranged in parallel to each other, and the first inclined cable insulator assembly 15 and the second inclined cable insulator assembly 16 are arranged in an intersecting manner.

[0038] The first post insulator assembly 13, the second post insulator assembly 14, the first inclined cable insulator assembly 15, and the second inclined cable insulator assembly 16 are used to support the platform frame 17. The first inclined cable insulator assembly 15 and the second inclined cable insulator assembly 16 are used to improve the overall strength and seismic performance of the high-potential platform 1.

[0039] Specifically, the other end of the first inclined cable insulator assembly 15 is fixedly connected to the bottom of the platform frame 17 near the second post insulator assembly 14, and the other end of the second inclined cable insulator assembly 16 is fixedly connected to the bottom of the platform frame 17 near the first post insulator assembly 13.

[0040] In some specific embodiments of this application, the first post insulator assembly 13 includes a plurality of post insulators, which are connected end to end; the second post insulator assembly 14 includes a plurality of post insulators, which are connected end to end.

[0041] For example, the first post insulator assembly 13 includes three post insulators, and the second post insulator assembly 14 also includes three insulators.

[0042] The first inclined-stay insulator assembly 15 may include multiple inclined-stay insulators, and the multiple inclined-stay insulators of the first inclined-stay insulator assembly 15 are connected head-to-head. The second inclined-stay insulator assembly 16 may also include multiple inclined-stay insulators, and the multiple inclined-stay insulators of the second inclined-stay insulator assembly 16 are connected head-to-head.

[0043] For example, the first inclined cable insulator assembly 15 includes two inclined cable insulators, and the second inclined cable insulator assembly 16 also includes two inclined cable insulators.

[0044] The first inclined insulator assembly 15 and the second inclined insulator assembly 16 can be tightened using turnbuckles to improve overall strength and seismic performance.

[0045] The number of base, post insulator assemblies and cable-stayed insulator assemblies in this application can be adaptively adjusted according to the dimensions of the platform frame 17.

[0046] In this application, the number of post insulator sections and the height of the first post insulator assembly 13 and the second post insulator assembly 14, and the number of cable-stayed insulator sections and the height of the first cable-stayed insulator assembly 15 and the second cable-stayed insulator assembly 16 are adjusted for adaptability according to the voltage level.

[0047] In the above embodiments of this application, the first base 11 and the second base 12 are used to fix the first post insulator assembly 13 and the second post insulator assembly 14 respectively, thereby improving the stability of the high-potential platform 1. The first inclined insulator assembly 15 and the second inclined insulator assembly 16 are arranged between the first post insulator assembly 13 and the second post insulator assembly 14, thereby improving the overall strength and seismic performance of the high-potential platform 1.

[0048] To facilitate equipment installation and maintenance, in some specific embodiments of this application, the high-potential platform 1 further includes a fence 18 and a ladder 19. The fence 18 is set around the edge of the platform frame 17 and is located on the top of the platform frame 17. One end of the ladder 19 is fixedly connected to the side of the fence 18, and the other end of the ladder 19 extends to the ground and is fixed to the ground.

[0049] Specifically, the fence 18 is set around the platform frame 17.

[0050] Ladder 19 is used by maintenance workers to go up and down to install and repair equipment.

[0051] In the above embodiments of this application, a ladder 19 is provided to facilitate maintenance workers to go up and down to install and repair equipment, and a fence 18 is provided to protect the equipment installed on the platform frame 17 and to protect the safety of maintenance workers.

[0052] In some specific embodiments of this application, the current-limiting reactor 2 is disposed on the top of the platform frame 17 and inside the fence 18. The current-limiting reactor 2 includes a reactor coil 21 and a reactor insulator 22. The reactor insulator 22 is fixed on the top of the platform frame 17, and the reactor coil 21 is fixed on the top of the reactor insulator 22.

[0053] Specifically, the current-limiting reactor 2 is fixedly installed on the crossbeam of the platform frame 17.

[0054] The reactor coil 21 is used to generate inductance through the principle of electromagnetic induction and limit the current through the inductance, thereby limiting the short-circuit current and stabilizing the voltage of the power system; the reactor insulator 22 is used to fix and support the reactor coil 21, withstand external forces, and the reactor insulator 22 is insulating to prevent the reactor coil 21 from short-circuiting to the platform frame 17.

[0055] In the embodiments of this application, the reactor insulator 22 only needs to meet the inter-terminal insulation requirements, which significantly reduces the height compared to conventional reactors and improves stability.

[0056] In the above embodiments of this application, the short-circuit current is limited by setting a current-limiting reactor 2.

[0057] In some specific embodiments of this application, the quick switch 3 is disposed on the top of the platform frame 17 and inside the fence 18. The quick switch 3 includes a ceramic sleeve 31, a vacuum interrupter 32, and an operating mechanism 33. The ceramic sleeve 31 is fixed to the top of the platform frame 17, the vacuum interrupter 32 is disposed inside the ceramic sleeve 31, and the operating mechanism 33 is disposed at the bottom of the vacuum interrupter 32. Furthermore, the operating mechanism 33 is fixedly connected to the vacuum interrupter 32.

[0058] Specifically, the operating mechanism 33 is connected to the moving rod of the vacuum interrupter 32 via a metal pull rod, eliminating the need for a long insulating pull rod.

[0059] In the embodiments of this application, the fast switch 3 is installed on the high-potential platform 1, eliminating the need for a long insulating pull rod, resulting in faster opening speed and higher reliability.

[0060] The porcelain bushing 31 is used for high-voltage insulation. The vacuum interrupter 32 is used to quickly cut off the current when the fast switch 3 is opened, reducing the impact of the fault on the power grid and extinguishing the "arc" generated at the moment of current disconnection; when the fast switch 3 is closed, it carries the rated current of the power system to ensure normal power supply. The operating mechanism 33 is used to provide mechanical power for the fast switch 3 to open and close, driving the moving rod of the vacuum interrupter 32 to move quickly, thereby realizing the opening or closing of the fast switch 3.

[0061] For example, the operating mechanism 33 may be an electromagnetic repulsion mechanism.

[0062] In the embodiments of this application, the fast switch 3 and the input and output terminals of the current limiting reactor are connected in parallel. When the line is running normally, the current flows through the main circuit where the fast switch 3 is located. When the line is faulty, the fast switch 3 is tripped, the current limiting reactor 2 is connected to the line, and the current limiting reactor 2 suppresses the short-circuit current.

[0063] The number of quick-connect switches 3 connected in series and parallel can be easily expanded on the high-potential platform 1. The number of switches can be determined based on power system parameters, the insulation level of the vacuum interrupter 32, and the transient overvoltage between terminals when the current limiter reactor is switched on or off.

[0064] In the above embodiments of this application, the fast switch 3 and the current limiter reactor are connected in parallel and both are set on the high-potential platform 1. This eliminates the need for long insulating pull rods, improves the opening speed, enhances reliability, and effectively suppresses short-circuit current.

[0065] In some specific embodiments of this application, the control unit 4 is located on the top of the platform frame 17 and inside the fence 18. The control unit 4 is also used to control the fast switch 3 to close or open according to the control signal from the ground so as to realize the current limiting reactor 2 to be disconnected or connected to the line.

[0066] Specifically, the control unit 4 is installed close to the fast switch 3. The control unit 4 collects the equipment parameters of each device and receives the control signals from the ground control and protection device. Based on the control signals, it controls the fast switch 3 to close or open, and controls the current limiting reactor 2 to exit or enter the line, thereby realizing the current limiting function of the current limiting reactor 2.

[0067] In the above embodiments of this application, by setting up a control unit 4, the equipment parameters of each device are effectively collected and monitored, and the control of the fast switch 3 is realized based on the control signal of the ground control and protection device, thereby improving the reliability and stability of the fast switch 3.

[0068] In some specific embodiments of this application, the isolation transformer is disposed below the platform frame 17. The isolation transformer includes a composite bushing 51, windings and iron core 52. The windings and iron core 52 include a metal shell, windings and iron core. The windings and iron core are disposed inside the metal shell. The windings are wound on the iron core. The composite bushing 51 is installed on the top of the metal shell. The composite bushing and the metal shell are filled with insulating gas.

[0069] Specifically, the composite sleeve 51 and the metal shell are filled with insulating gas, such as 0.4MPa, 0.5MPa, etc., depending on the design requirements.

[0070] The winding and core 52 use the principle of electromagnetic induction to transform the input of the primary winding at ground potential into the output of the secondary winding at high potential. The composite bushing is used to support the output of the secondary winding at high potential and to insulate it from the ground.

[0071] In the above embodiments of this application, by setting up an isolation transformer, the insulation between the transformer and the ground and the primary and secondary windings is satisfied, and the ground potential power supply is delivered to the high potential platform 1.

[0072] In some specific embodiments of this application, one end of the optical fiber insulator 6 is fixedly connected to the bottom of the platform frame 17, and the other end of the optical fiber insulator 6 is connected to the ground.

[0073] The fiber optic insulator 6 has a communication optical fiber pre-embedded inside, and the fiber optic insulator 6 is filled with adhesive.

[0074] Specifically, the fiber optic insulator 6 is suspended on the crossbeam of the platform frame 17. The interior of the fiber optic insulator 6 is filled with glue to meet the insulation requirements, and communication between the high-potential platform 1 and the ground is realized through the communication fiber optic cable.

[0075] For example, the platform integrated current limiter 100 provided in this application can be a 550kV platform integrated current limiter, which has high integration, good scalability, reduced footprint, and the switch does not require an insulating pull rod, greatly improving reliability. It can also be extended to other current limiters with higher voltage levels.

[0076] The preferred features in the above embodiments can be used individually in any embodiment, or in any combination thereof, provided they do not conflict with each other. Furthermore, parts not described in detail in the embodiments can be implemented using existing technologies.

[0077] The specific embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this application. The above-described preferred features can be used in any combination without conflict.

Claims

1. A platform integrated current limiter, characterized by, The high potential platform, the current limiting reactor, the fast switch, the control unit, the isolation transformer and the optical fiber insulator are arranged on the high potential platform, the current limiting reactor and the fast switch are connected in parallel, the current limiting reactor is used to limit short-circuit current when a line fails, the fast switch is used to close or open to realize the current limiter reactor to exit or enter the line, the control unit is used to collect device parameters and receive ground control signals, the isolation transformer is used to transmit ground potential power to the high potential platform, and the optical fiber insulator is used for communication between the high potential platform and the ground. The high potential platform is used to support the current limiting reactor, the fast switch and the control unit.

2. The platform-integrated current limiter of claim 1, wherein, The high potential platform comprises a first base, a second base, a first support insulator assembly, a second support insulator assembly, a first cable-stayed insulator assembly, a second cable-stayed insulator assembly and a platform frame, one end of the first support insulator assembly is fixedly connected with the first base, the other end of the first support insulator assembly is fixedly connected with the bottom of the platform frame, one end of the second support insulator assembly is fixedly connected with the second base, the other end of the second support insulator assembly is fixedly connected with the bottom of the platform frame, one end of the first cable-stayed insulator assembly is fixedly connected with the first base, the other end of the first cable-stayed insulator assembly is fixedly connected with the bottom of the platform frame, one end of the second cable-stayed insulator assembly is fixedly connected with the second base, the other end of the second cable-stayed insulator assembly is fixedly connected with the bottom of the platform frame, the first support insulator assembly and the second support insulator assembly are arranged in parallel with each other, and the first cable-stayed insulator assembly and the second cable-stayed insulator assembly are arranged in a cross manner. The high potential platform further comprises a fence and a ladder, the fence is arranged on the top of the platform frame around the edge of the platform frame, one end of the ladder is fixedly connected with the side of the fence, and the other end of the ladder extends to the ground and is fixed on the ground.

3. The platform-integrated current limiter of claim 2, wherein, The first support insulator assembly comprises a plurality of support insulators, and the plurality of support insulators of the first support insulator assembly are connected end to end, the second support insulator assembly comprises a plurality of support insulators, and the plurality of support insulators of the second support insulator assembly are connected end to end.

4. The platform-integrated current limiter of claim 2, wherein, The current limiting reactor is arranged on the top of the platform frame and inside the fence, the current limiting reactor comprises a reactor coil and a reactor insulator, the reactor insulator is fixed on the top of the platform frame, and the reactor coil is fixed on the top of the reactor insulator.

5. The platform-integrated current limiter of claim 3, wherein, ​ 6. The platform-integrated current limiter of claim 3, wherein, The quick switch is arranged on the top of the platform frame and inside the fence, and comprises a porcelain sleeve, a vacuum arc-extinguishing chamber and an operating mechanism, the porcelain sleeve is fixed on the top of the platform frame, the vacuum arc-extinguishing chamber is arranged inside the porcelain sleeve, and the operating mechanism is arranged on the bottom of the vacuum arc-extinguishing chamber and fixedly connected with the vacuum arc-extinguishing chamber.

7. The platform-integrated flow restrictor of claim 3, wherein, The control unit is arranged on the top of the platform frame and inside the fence, and is further used for controlling the quick switch to close or open according to the control signal of the ground.

8. The platform-integrated flow restrictor of claim 3, wherein, The isolation transformer is arranged below the platform frame, and comprises a composite sleeve, a winding and a core, the winding and the core comprise a metal shell, a winding and a core, the winding and the core are arranged inside the metal shell, the winding is wound on the core, the composite sleeve is installed on the top of the metal shell, and the composite sleeve and the metal shell are filled with insulating gas.

9. The platform-integrated flow restrictor of claim 2, wherein, One end of the optical fiber insulator is fixedly connected with the bottom of the platform frame, and the other end of the optical fiber insulator is connected with the ground.

10. The platform-integrated flow restrictor of claim 9, wherein, The communication optical fiber is pre-embedded in the optical fiber insulator, and the optical fiber insulator is filled with glue.

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