Optical fiber distribution frame communication system for high-voltage level connection system

Abstract

The application discloses a fiber distribution frame communication system suitable for a high-voltage interlocking system, which comprises a chain cabin and a control cabin, the chain cabin comprises a plurality of power units and a first fiber distribution frame, each power unit is connected with the first fiber distribution frame, and the control cabin comprises a controller and a second fiber distribution frame, and the controller is connected with the second fiber distribution frame. Through the fiber distribution frame communication system, the problem of inter-cabin communication of the high-voltage interlocking system is effectively solved, and the safe and stable operation of the high-voltage interlocking system is ensured.

Description

Technical Field

[0001] This application relates to the fields of high-voltage cascade systems and optical fiber communication technology, and in particular to an optical fiber distribution frame communication system applicable to high-voltage cascade systems. Background Technology

[0002] High-voltage cascade systems typically consist of multiple link modules. Each link module needs to exchange data in real time with the control module to achieve data processing and coordinated control of the high-voltage cascade system. However, the high-voltage environment poses significant challenges to traditional cable communication methods, mainly in the following aspects:

[0003] (1) Severe electromagnetic interference: Strong electromagnetic interference exists under high voltage environment, which can easily lead to distortion or even interruption of cable communication signals.

[0004] (2) High insulation requirements: Special insulation materials are required in high-voltage environments, which increases the cost and complexity of cables.

[0005] (3) Signal attenuation and delay: Long-distance cable transmission is prone to attenuation, resulting in accumulated communication delay.

[0006] (4) Complex maintenance: Traditional cabling has low redundancy and is difficult to troubleshoot.

[0007] Based on the above analysis of electromagnetic interference issues in high-voltage environments on traditional cable communications, solutions for inter-cabin communication in high-voltage cascaded systems in related technologies typically employ the following methods: Figure 1 As shown, each power unit outputs one pair of optical fibers, connecting to the main controller in the control cabin, thereby achieving centralized management and control of the entire high-voltage cascade system. However, in related technical solutions, although optical fibers are used to replace cables, the layout of optical fiber distribution frames is not optimized for the multi-compartment structure of the high-voltage cascade system, resulting in a large number of optical fibers and a complex optical fiber network topology. In other words, the existing high-voltage cascade system uses an inter-cabin communication scheme where each power unit outputs one pair of optical fibers, connecting to the main controller in the control cabin. Although this scheme solves the electromagnetic interference problem of inter-cabin communication in a high-voltage environment to some extent, it still has the following drawbacks:

[0008] (1) The number of optical fibers is large and the wiring is complex: Each power unit requires a pair of independent optical fibers to connect to the control compartment, which causes the number of optical fibers to increase dramatically with the number of power units. The large number of optical fibers increases the difficulty and cost of wiring, as well as the complexity of system maintenance.

[0009] (2) Complex maintenance and low fault tolerance: The existing solution adopts a point-to-point connection method, which is complex to maintain and has a low fault tolerance. Due to the consideration of high voltage electrical insulation, armored optical fiber cannot be used, which makes it easy to break. When one of the optical fibers has a problem and needs to be replaced, outdoor optical fiber needs to be re-laid, which involves a large amount of on-site construction and is difficult, increasing the maintenance cost and difficulty of the system.

[0010] (3) Potential reliability issues: The point-to-point connection means that if any fiber optic cable fails, it will affect the communication of the corresponding power unit and reduce the reliability of the system.

[0011] While existing solutions address the basic communication needs of inter-cabin systems in high-voltage electromagnetic interference environments, they have significant shortcomings in terms of cost, wiring complexity, reliability, and maintenance. As the scale of high-voltage cascaded systems continues to expand and application scenarios become increasingly complex, existing solutions will struggle to meet future development needs, necessitating the exploration of more efficient, reliable, flexible, and economical inter-cabin communication solutions. Utility Model Content

[0012] This application provides a fiber optic distribution frame communication system applicable to high-voltage cascade systems, which effectively solves the problem of inter-cabin communication in high-voltage cascade systems and provides a guarantee for the safe and stable operation of high-voltage cascade systems.

[0013] The embodiments of this application adopt the following technical solutions:

[0014] In a first aspect, embodiments of this application provide a fiber optic distribution frame communication system applicable to high-voltage cascaded systems, wherein the fiber optic distribution frame communication system includes: a link compartment and a control compartment, the link compartment includes multiple power units and a first fiber optic distribution frame, each power unit is connected to the first fiber optic distribution frame, and the control compartment includes a controller and a second fiber optic distribution frame, the controller being connected to the second fiber optic distribution frame.

[0015] In some embodiments, the second fiber optic distribution frame is deployed as a central fiber optic distribution frame, and the first fiber optic distribution frame is deployed as an edge fiber optic distribution frame.

[0016] In some embodiments, the central fiber optic distribution frame serves as a core node of the network, and the edge fiber optic distribution frame serves to converge the optical signals of multiple power units within the control cabin to a unified node.

[0017] In some embodiments, the first fiber optic distribution frame serves as a central junction box for inter-cabin communication, centrally managing the fiber optic links entering and exiting the chain section cabin through a standard interface.

[0018] In some embodiments, the standard interface includes one of the following: ST, LC, SC.

[0019] In some embodiments, the chain link compartment and the control compartment are connected by a multi-core prefabricated optical cable, which connects the first optical fiber distribution frame and the second optical fiber distribution frame.

[0020] In some embodiments, each of the power units is connected to the first fiber optic distribution frame via an optical fiber, the second fiber optic distribution frame is connected to the controller via multiple optical fibers, and an opto-isolation circuit is provided at the fiber optic interface of the optical fiber.

[0021] In some embodiments, both the first fiber optic distribution frame and the second fiber optic distribution frame are provided with ceramic ferrule high-voltage isolation modules.

[0022] In some embodiments, the outer shells of both the first and second fiber optic distribution frames are made of metal shielding and connected to the system grounding grid via independent grounding wires.

[0023] The at least one technical solution adopted in this application embodiment can achieve the following beneficial effects: Specifically, the fiber optic distribution frame communication system includes: a link compartment and a control compartment. The link compartment includes multiple power units and a first fiber optic distribution frame, with each power unit connected to the first fiber optic distribution frame. The control compartment includes a controller and a second fiber optic distribution frame, with the controller connected to the second fiber optic distribution frame. Each link compartment's control room is equipped with a fiber optic distribution frame, and the optical signals from each power unit within the compartment are aggregated into the fiber optic distribution frame via optical fibers to achieve signal aggregation. Then, through an external multi-core optical cable passing through an outdoor cable trench, each link compartment is connected to the fiber optic distribution frames on both sides of the control compartment. This enables data transmission between the power units of each link compartment and the main controller in the control compartment. The main controller is responsible for the coordinated control and data analysis of the entire high-voltage cascaded system.

[0024] The system in this application embodiment effectively solves the problems of large number of optical fibers, complex wiring, poor scalability, low reliability, and high cost in the prior art. The system in this application embodiment has the advantages of high reliability, simple maintenance, flexible expansion, and low cost, and can be applied to high-voltage cascade systems of various sizes. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 A schematic diagram of the structural solution for inter-cabin communication in a high-voltage cascaded system in related technologies;

[0027] Figure 2This is a schematic diagram of the fiber optic distribution frame communication system applicable to high-voltage cascade systems in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the structure of the fiber optic distribution frame in the communication system of the high-voltage cascade system applicable to the embodiments of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0031] This application provides a fiber optic distribution frame communication system suitable for high-voltage cascade systems, such as... Figure 2 As shown, a schematic diagram of the fiber optic distribution frame communication system applicable to high-voltage cascade systems in this application embodiment is provided. The fiber optic distribution frame communication system includes: a link compartment and a control compartment. The link compartment includes multiple power units and a first fiber optic distribution frame. Each power unit is connected to the first fiber optic distribution frame. The control compartment includes a controller and a second fiber optic distribution frame. The controller is connected to the second fiber optic distribution frame.

[0032] The "fiber optic distribution frame" serves as the central junction box for inter-cabin communication, centrally managing all fiber optic links entering and exiting the link compartments through a standard interface, thus achieving signal aggregation. Fiber optic distribution frames are deployed in both the link compartments and the control compartment, and are connected by multi-core prefabricated optical cables. However, their functions differ between the link compartments and the control compartment. Employing all-fiber communication and fiber optic distribution frames, utilizing the electromagnetic immunity of optical fibers, and using isolation devices such as ceramic ferrules built into the fiber optic distribution frames, electrical conduction interference between link compartments is blocked.

[0033] This system reduces the number of optical fibers and simplifies cabling, thereby lowering costs. Using containers as units, a fiber optic distribution frame is installed in the control room of each link compartment, with a central fiber optic distribution frame deployed in the control compartment. These distribution frames are directly connected to the fiber optic distribution frames of each link compartment via star links. Each link compartment only needs to output one multi-core optical cable to the control compartment. Compared to the existing solution where each power unit requires a separate pair of optical fibers to connect to the control compartment, this significantly reduces the number of optical fibers, simplifies inter-compartment cabling, reduces on-site installation work, and lowers system costs.

[0034] The system described above simplifies maintenance. Using containers as units, each link bay outputs one multi-core optical cable to the control bay. When one pair of optical fibers fails and needs replacement, the spare core of the multi-core cable can be used directly, eliminating the need to re-lay outdoor optical fibers, making on-site maintenance simple and convenient. Even if the multi-core optical cable needs to be replaced, compared to existing solutions that require a large number of optical fibers (each power unit needs to output a separate pair of optical fibers to the central control bay), the multi-core optical cable method simplifies wiring and makes subsequent system maintenance relatively straightforward.

[0035] The aforementioned system offers reliable communication and a low failure rate. Compared to existing systems using ordinary fiber optic patch cords, the use of multi-core armored optical cables makes the cables less prone to breakage and more tensile-resistant during outdoor cable trench installation. Furthermore, the multi-core armored optical cables are better suited to harsh environments at project sites, resulting in more stable and reliable inter-cabin communication and a lower failure rate.

[0036] The system offers flexible expansion capabilities. Due to the use of modular fiber optic distribution frames, it supports hot-swappable expansion. If power units are added or replaced in subsequent link compartments, the connection time is short, making it easy to expand the high-voltage cascade system in the later stages.

[0037] By adopting an improved communication architecture using all-fiber communication and fiber optic distribution frames, fiber optic distribution frames are configured on a container-by-container basis. Signal aggregation is achieved by converging optical fibers into these distribution frames. A central fiber optic distribution frame is deployed in the control compartment, with multi-core optical cables directly connected to the fiber optic distribution frames of each link compartment via star links. This enables data transmission between the power units of each link compartment and the main controller in the control compartment, reducing the number of optical fibers required between the control compartment and each link compartment in the high-voltage cascade system, thus solving the problems of large fiber optic quantity and complex wiring in existing solutions. This improvement directly determines the advantages of simple maintenance and low cost in the high-voltage cascade system, and facilitates standardized fiber optic design schemes for high-voltage cascade systems. High-voltage isolation design is also included.

[0038] In one embodiment of this application, the second fiber optic distribution frame is deployed as a central fiber optic distribution frame, and the first fiber optic distribution frame is deployed as an edge fiber optic distribution frame.

[0039] The second fiber optic distribution frame is deployed in the control compartment and serves as the central fiber optic distribution frame. Similarly, the first fiber optic distribution frame is deployed in the link compartment and serves as the edge fiber optic distribution frame.

[0040] In one embodiment of this application, the central fiber optic distribution frame is used as a core node of the network, and the edge fiber optic distribution frame is used to converge the optical signals of multiple power units in the control cabin to a unified node.

[0041] In each of the aforementioned link modules, an edge fiber distribution frame (ODF) is installed to aggregate the optical signals from each power unit within the module to a unified node. A central fiber distribution frame (ODF) is deployed in at least one control module as the core node of the entire network, directly connected to the fiber distribution frames of each link module via a star topology to ensure low latency of control commands.

[0042] In one embodiment of this application, the first fiber optic distribution frame serves as a central junction box for inter-cabin communication, centrally managing the fiber optic links entering and exiting the chain section cabin through a standard interface.

[0043] All fiber optic links entering and exiting the chain section are centrally managed through standard interfaces (such as ST / LC / SC) to achieve signal aggregation.

[0044] In one embodiment of this application, the standard interface includes one of the following: ST, LC, SC.

[0045] ST, LC, and SC are three common types of fiber optic connectors. Specifically, ST, LC, and SC all belong to fiber optic interfaces, also known as fiber optic detachable connectors. Fiber optic connectors are devices used to detachably connect optical fibers, precisely mating the two end faces of the fibers to maximize the coupling of optical energy.

[0046] It's understandable that the SC connector, short for Square Connector, is a medium-sized fiber optic connector characterized by its simple structure and easy insertion / removal. The ST connector, short for Stab & Twisst, is made of metal and is characterized by its small size and simple structure. It uses a bayonet-type connection, allowing for direct locking without tools. The LC connector, short for Lucent Connector, is made of plastic. Its characteristics include easy connection and low insertion loss. It uses a pluggable connection, allowing for direct insertion and removal without tools.

[0047] In one embodiment of this application, the chain link compartment and the control compartment are connected by a multi-core prefabricated optical cable, which connects the first optical fiber distribution frame and the second optical fiber distribution frame.

[0048] like Figure 3 As shown, by using a multi-core optical cable that is high-voltage anti-interference, high-temperature resistant and radiation resistant, anti-interference transmission is achieved under high-voltage conditions.

[0049] The optical signals from each power unit within the cabin are aggregated via optical fiber to a fiber optic distribution frame, achieving signal convergence. Then, a multi-core optical cable is routed through an outdoor cable trench to connect each link module to the fiber optic distribution frames on both sides of the control cabin. This enables data transmission between the power units of each link module and the main controller in the control cabin. The main controller is responsible for the coordinated control and data analysis of the entire high-voltage cascade system.

[0050] In one embodiment of this application, each of the power units is connected to the first fiber optic distribution frame via an optical fiber, the second fiber optic distribution frame is connected to the controller via multiple optical fibers, and an opto-isolation circuit is provided at the fiber optic interface of the optical fiber.

[0051] Due to the high-voltage isolation design, the inter-compartment voltage in a high-voltage cascaded system can reach tens of thousands of volts. The fiber optic distribution frame incorporates a ceramic ferrule high-voltage isolation module (e.g., withstand voltage ≥35kV) to block current conduction caused by potential differences between compartments, preventing breakdown of the fiber optic metal components. Simultaneously, non-metallic fiber optic patch cords are used to eliminate coupling interference from the high-voltage electric field on the optical signal.

[0052] In one embodiment of this application, both the first fiber optic distribution frame and the second fiber optic distribution frame are provided with ceramic ferrule high-voltage isolation modules.

[0053] Grounding optimization is adopted, and an opto-isolation circuit is designed at the fiber optic interface to isolate the electrical loops between the equipment side and the fiber optic side, preventing ground loop interference.

[0054] In one embodiment of this application, the outer shells of both the first and second fiber optic distribution frames are made of metal shielding and are connected to the system grounding grid through independent grounding wires.

[0055] For electromagnetic shielding, the fiber optic distribution frame shell uses a metal shielding layer and is connected to the system grounding network through an independent grounding wire to suppress the impact of external electromagnetic interference (EMI) on the optical modules. The core of the system is a star-topology fiber optic network, with fiber optic distribution frames in the link compartments and the control compartment directly connected to the fiber optic distribution frames in each link compartment via star links of multi-core optical cables for data transmission. This system covers hardware structure, communication protocols, and operation and maintenance procedures.

[0056] The embodiments of this application also provide a high-voltage cascade system, which includes the aforementioned fiber optic distribution frame communication system. The fiber optic distribution frame communication system includes a link compartment and a control compartment. The link compartment includes multiple power units and a first fiber optic distribution frame. Each power unit is connected to the first fiber optic distribution frame. The control compartment includes a controller and a second fiber optic distribution frame. The controller is connected to the second fiber optic distribution frame.

[0057] In some embodiments, the second fiber optic distribution frame is deployed as a central fiber optic distribution frame, and the first fiber optic distribution frame is deployed as an edge fiber optic distribution frame.

[0058] In some embodiments, the central fiber optic distribution frame serves as a core node of the network, and the edge fiber optic distribution frame serves to converge the optical signals of multiple power units within the control cabin to a unified node.

[0059] In some embodiments, the first fiber optic distribution frame serves as a central junction box for inter-cabin communication, centrally managing the fiber optic links entering and exiting the chain section cabin through a standard interface.

[0060] In some embodiments, the standard interface includes one of the following: ST, LC, SC.

[0061] In some embodiments, the chain link compartment and the control compartment are connected by a multi-core prefabricated optical cable, which connects the first optical fiber distribution frame and the second optical fiber distribution frame.

[0062] In some embodiments, each of the power units is connected to the first fiber optic distribution frame via an optical fiber, the second fiber optic distribution frame is connected to the controller via multiple optical fibers, and an opto-isolation circuit is provided at the fiber optic interface of the optical fiber.

[0063] In some embodiments, both the first fiber optic distribution frame and the second fiber optic distribution frame are provided with ceramic ferrule high-voltage isolation modules.

[0064] In some embodiments, the outer shells of both the first and second fiber optic distribution frames are made of metal shielding and connected to the system grounding grid via independent grounding wires.

[0065] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A fiber optic distribution frame communication system suitable for high-voltage cascaded systems, wherein, The fiber optic distribution frame communication system includes a link compartment and a control compartment. The link compartment includes multiple power units and a first fiber optic distribution frame, with each power unit connected to the first fiber optic distribution frame. The control compartment includes a controller and a second fiber optic distribution frame, with the controller connected to the second fiber optic distribution frame.

2. The fiber optic distribution frame communication system as described in claim 1, wherein, The second fiber optic distribution frame is deployed as a central fiber optic distribution frame, and the first fiber optic distribution frame is deployed as an edge fiber optic distribution frame.

3. The fiber optic distribution frame communication system as described in claim 2, wherein, The central fiber optic distribution frame serves as the core node of the network, while the edge fiber optic distribution frames are used to converge the optical signals of multiple power units within the control cabin to a unified node.

4. The fiber optic distribution frame communication system as described in claim 2, wherein, The first fiber optic distribution frame serves as the central junction box for inter-cabin communication, centrally managing the fiber optic links entering and exiting the chain section cabin through a standard interface.

5. The fiber optic distribution frame communication system as described in claim 4, wherein, The standard interface includes one of the following: ST, LC, SC.

6. The fiber optic distribution frame communication system as described in claim 1, wherein, The chain link compartment and the control compartment are connected by a multi-core prefabricated optical cable, which connects the first optical fiber distribution frame and the second optical fiber distribution frame.

7. The fiber optic distribution frame communication system as described in claim 6, wherein, Each of the power units is connected to the first fiber optic distribution frame via an optical fiber, and the second fiber optic distribution frame is connected to the controller via multiple optical fibers, with an opto-isolation circuit provided at the fiber optic interface of each optical fiber.

8. The fiber optic distribution frame communication system as described in claim 1, wherein, Both the first and second fiber optic distribution frames are equipped with ceramic ferrule high-voltage isolation modules.

9. The fiber optic distribution frame communication system as described in claim 1, wherein, The outer shells of both the first and second fiber optic distribution frames are made of metal shielding and are connected to the system grounding grid through independent grounding wires.

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