Optical fiber ring network topology communication system suitable for high-voltage level connection system

Abstract

The application discloses a fiber ring network topology communication system suitable for a high-voltage interconnection system, and belongs to the field of high-voltage interconnection system communication systems. The fiber ring network topology communication system comprises a plurality of power units in a chain cabin which are connected in a loop shape through first optical fibers and connected to a controller in a control cabin through second optical fibers. The fiber ring network topology communication system suitable for the high-voltage interconnection system effectively solves the complex problem of fiber communication of the high-voltage interconnection system, and provides guarantee for safe and stable operation of the high-voltage interconnection system.

Description

Technical Field

[0001] This application relates to the field of high-voltage cascaded system technology, and in particular to an optical fiber ring network topology communication system applicable to high-voltage cascaded systems. Background Technology

[0002] High-voltage cascade systems mainly include, but are not limited to, high-voltage cascaded energy storage systems, high-voltage cascaded SVG systems, and high-voltage cascaded supercapacitor static condenser systems.

[0003] Specifically, common high-voltage cascade systems typically consist of multiple link modules, and each link module needs to exchange data with the control module in real time to achieve data processing and coordinated control of the high-voltage cascade system. However, high-voltage environments pose significant challenges to traditional cable communication methods, mainly in the following aspects:

[0004] (1) Severe electromagnetic interference: Due to the strong electromagnetic interference in the high-voltage environment, it is easy to cause distortion or even interruption of cable communication signals.

[0005] (2) High insulation requirements: Special insulation materials are required in high-voltage environments, which increases the cost and complexity of the cable.

[0006] (3) Limited transmission distance: The transmission distance of cable communication is limited, which makes it difficult to meet the needs of large-scale high-voltage cascade systems. Utility Model Content

[0007] This application provides an optical fiber ring network topology communication system applicable to high-voltage cascade systems. This system reduces electromagnetic interference, increases transmission distance, and meets insulation requirements, effectively solving the complex challenges of optical fiber communication in high-voltage cascade systems and ensuring the safe and stable operation of high-voltage cascade systems.

[0008] The embodiments of this application adopt the following technical solutions:

[0009] In a first aspect, embodiments of this application provide an optical fiber ring network topology communication system applicable to high-voltage cascaded systems, wherein the high-voltage cascaded system includes multiple link modules, and each link module exchanges data with a control module in real time. The optical fiber ring network topology communication system includes:

[0010] Multiple power units within the chain link compartment are connected end-to-end via the first optical fiber, forming a ring network, and then connected to the controller in the control compartment via the second optical fiber.

[0011] In some embodiments, the plurality of power units include power unit 1, power unit 2, ... and power unit n.

[0012] After the first optical fiber is connected to the power unit n, ... the power unit 2 and the power unit 1 respectively, it is uploaded sequentially through the first optical fiber and finally summarized to the power unit 1.

[0013] In some embodiments, the second optical fiber includes two optical fibers with bidirectional transmission paths.

[0014] In some embodiments, the two optical fibers of the second optical fiber enable bidirectional transmission.

[0015] In some embodiments, a communication loop is used within the link compartment, and the communication of multiple power units is serialized in the same communication link.

[0016] In some embodiments, the power unit is used for DC conversion and power transmission.

[0017] In some embodiments, the controller is used to handle the coordinated control and data analysis of the high-voltage cascaded system.

[0018] The at least one technical solution adopted in the embodiments of this application can achieve the following beneficial effects: the above system 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 the embodiments of this application has the advantages of high reliability, low cost, simple maintenance and simple wiring, and is suitable for high voltage cascade systems of various scales. Attached Figure Description

[0019] 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:

[0020] Figure 1 This is a schematic diagram of a communication scheme for a high-voltage cascade system in related technologies.

[0021] Figure 2 This is a schematic diagram of the internal structure of the fiber optic ring network topology communication system applicable to the high-voltage cascade system in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the optical fiber ring network topology communication system applicable to high-voltage cascade systems in the embodiments of this application. Detailed Implementation

[0023] 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.

[0024] like Figure 1 As shown, the existing high-voltage cascaded system uses a communication scheme where each power unit outputs one pair of optical fibers to connect to the controller in the control cabin. While 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:

[0025] (1) The number of optical fibers is enormous, and the cabling is complex:

[0026] Each power unit requires a separate pair of optical fibers to connect to the control compartment, causing the number of optical fibers to increase dramatically with the number of power units. This large number of optical fibers increases the difficulty and cost of cabling, as well as the complexity of system maintenance.

[0027] (2) Complex maintenance and low fault tolerance:

[0028] The existing solution uses a point-to-point connection method, which is complex to maintain and has a low fault tolerance rate. Due to the need for high-voltage electrical insulation, armored optical fibers cannot be used, making them prone to breakage. When one optical fiber fails and needs to be replaced, outdoor optical fibers need to be re-laid, which involves a large amount of on-site construction and is difficult, increasing the system's maintenance costs and complexity.

[0029] (3) Risk of single point of failure, low reliability:

[0030] Point-to-point connections mean that a failure in any fiber will affect the communication of the corresponding power unit. Existing star topologies rely on a central node, posing a single point of failure risk; in a chain structure, a failure in any node or fiber will cause the entire link to break down, reducing system reliability.

[0031] As can be seen from the above, while the existing solutions address the basic communication needs of high-voltage cascaded systems under high-voltage electromagnetic interference environments, they have significant shortcomings in terms of cost, wiring complexity, reliability, and maintenance. With the continuous expansion of the scale of high-voltage cascaded systems and the increasing complexity of application scenarios, the existing solutions will be insufficient to meet future development needs, necessitating the exploration of more efficient, reliable, flexible, and economical communication solutions for high-voltage cascaded systems.

[0032] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0033] This application provides an embodiment of an optical fiber ring network topology communication system suitable for high-voltage cascaded systems, such as... Figure 2 As shown, a schematic diagram of the internal structure of an optical fiber ring network topology communication system applicable to a high-voltage cascade system in this application embodiment is provided. The high-voltage cascade system includes multiple link modules 1, and each link module 1 exchanges data with the control module 2 in real time. The optical fiber ring network topology communication system includes: multiple power units 11 in the link module 1 are connected end to end through a first optical fiber 31, and after forming a ring network, they are connected to the controller 21 in the control module 2 through a second optical fiber 32.

[0034] A fiber optic ring network topology is adopted for communication loopback. Power units within the chain link compartment are connected end-to-end via optical fibers, forming a ring network that connects to the main controller in the control compartment for data transmission. The controller in the control compartment is responsible for the coordinated control and data analysis of the entire high-voltage cascaded system.

[0035] High-temperature resistant and radiation-resistant fiber optic communication is prioritized due to its strong signal interference resistance, making it suitable for data transmission in high-voltage environments. Simultaneously, a communication loopback method is employed, allowing multiple power units to communicate serially within a single communication link. This enables bidirectional transmission, meaning data can be transmitted in both clockwise and counterclockwise directions, with automatic path switching in case of a single point of failure.

[0036] Specifically, in a fiber optic ring network topology communication system, this can be used in a high-voltage cascade system. This high-voltage cascade system includes multiple link modules 1, and each link module 1 exchanges data with a control module 2 in real time. Those skilled in the art will understand that real-time data exchange between multiple link modules 1 and the control module 2 is well-known to them, and the interface is also known to them; therefore, it will not be elaborated further. Both the "first optical fiber 31" and the "second optical fiber 32" use optical fiber cables, but their specific uses are different. The arrangement of the multiple power units 11 within the link module 1 can be consistent with related technologies. However, after each power unit is sequentially connected end-to-end via the first optical fiber 31 to form a ring network, the power unit at the end of the ring network is then connected to the controller 21 in the control module 2 via the second optical fiber 32.

[0037] In other words, within link compartment 1, each power unit is connected end-to-end via optical fiber to form a closed-loop optical fiber ring network architecture, which is then connected to the controller in the control compartment. For example... Figure 2 The illustration shows only one possible implementation method and is not intended to limit the scope of protection in the embodiments of this application.

[0038] As we can understand it, a closed-loop fiber optic ring network architecture is a computer network architecture based on fiber optic transmission technology, employing a bidirectional ring topology. In this architecture, each node is interconnected via optical fibers, forming a closed ring network. Each node is equipped with a transmitter and a receiver, allowing data to be transmitted bidirectionally over the fiber, and different nodes can transmit data simultaneously. The closed-loop fiber optic ring network architecture is characterized by high speed, reliability, and security. Utilizing the high bandwidth and low loss characteristics of optical fibers, it achieves high-speed, stable data transmission, exhibiting high communication efficiency and flexibility. The bidirectional transmission capability of the closed-loop fiber optic ring network architecture improves network communication efficiency. Considering its high reliability, due to the bidirectional data transmission, the network's reliability is high; the failure of one node will not paralyze the entire network. The core function of the fiber optic ring network topology communication architecture is to connect power units within a container-like structure, end-to-end via optical fibers, forming a ring network; reducing the number of optical fibers required for communication in high-voltage cascade systems and solving the problems of large fiber optic quantities and complex cabling in existing solutions.

[0039] The above architecture is the core innovation of this application embodiment, which directly determines the advantages of high-voltage cascade system such as simple maintenance and low cost, and is conducive to unifying the standardized optical fiber design scheme of high-voltage cascade system.

[0040] The aforementioned system reduces the number of optical fibers and simplifies cabling. Specifically, taking a container as a unit, the power units within each link are connected end-to-end via optical fibers to form a ring network; each link only needs to output two pairs of optical fibers to the main controller in the control compartment. Compared to existing solutions where each power unit requires an independent pair of optical fibers to connect to the control compartment, this significantly reduces the number of optical fibers and simplifies the cabling between compartments.

[0041] The above system is simple to maintain. It is based on containers, and each link only needs to output two pairs (including spares) of optical fibers to the control room. When one pair of optical fibers fails and needs to be replaced, the spare optical fiber can be used directly for communication without the need to lay outdoor optical fibers again. On-site maintenance is simple and convenient.

[0042] The above system is highly reliable. The power units in the chain link compartment are connected end to end by optical fibers to form a ring network. A single point of failure will not affect the communication of the entire network. It adopts a ring optical fiber network and bidirectional data transmission. Even if one pair of optical fibers fails, the data can still be transmitted through the other pair of optical fibers.

[0043] The above system reduces fiber optic cable and laying costs by using a daisy-chain fiber optic ring network communication method, which greatly reduces the number of communication fibers in the high-voltage cascade system, reduces the amount of laying work, and lowers the cost of the high-voltage cascade system.

[0044] In one embodiment of this application, the plurality of power units include power unit 1, power unit 2, ... and power unit n. The first optical fiber is connected to power unit n, ... power unit 2 and power unit 1 respectively, and then uploaded sequentially through the first optical fiber and finally summarized to power unit 1.

[0045] like Figure 3 As shown, power unit 1, power unit 2, ... and power unit n, due to the access of the first optical fiber, can be transmitted from power unit n to power unit 1 in a sequential manner.

[0046] Thanks to the adoption of a bidirectional ring network communication loopback transmission structure, each power unit within the chain link compartment forms a physical closed loop through dual optical ports. This communication loopback method allows multiple power units to communicate serially within a single communication link. The main ring and backup ring are wired independently, achieving redundant data transmission along dual paths and overcoming the single-point-of-failure bottleneck of traditional chain architectures.

[0047] In one embodiment of this application, the second optical fiber includes two optical fibers with bidirectional transmission paths.

[0048] like Figure 3 As shown, the second optical fiber between the controller and the power unit uses two optical fibers with bidirectional transmission paths, thereby achieving distributed dual-ring redundancy.

[0049] In one embodiment of this application, the two optical fibers of the second optical fiber enable bidirectional transmission.

[0050] In one embodiment of this application, a communication loop is used within the link compartment, and the communication of multiple power units is serialized in the same communication link.

[0051] Because of the bidirectional transmission path, data can be transmitted in both clockwise and counterclockwise directions, and the path is automatically switched in case of a single point of failure. A communication loopback mechanism is used, allowing multiple power units to communicate serially within a single communication link.

[0052] Based on the fiber optic ring network topology, multiple power units in the link compartment are connected sequentially through dual optical ports to form a bidirectional closed fiber optic loop; the received optical power intensity of each node is monitored in real time, and when a link interruption is detected, the adjacent node switches to the backup ring transmission path within <10ms; a dual-redundant fiber optic ring network topology module is adopted.

[0053] In one embodiment of this application, the power unit is used for DC conversion and power transmission.

[0054] As the core component of a high-voltage cascaded system, the power unit is responsible for AC-DC conversion and power transmission. The AC units are connected in series to form a converter chain, and the output voltages of in-phase power units are superimposed to form a high voltage. The function of the power unit is well known to those skilled in the art and does not involve any improvements in this application.

[0055] In one embodiment of this application, the controller is used to handle the coordinated control and data analysis of a high-voltage cascaded system.

[0056] The controller is primarily responsible for the coordinated control and data analysis of the entire high-voltage cascade system. It is understood that the controller's functions are well-known to those skilled in the art and do not involve any improvements made in this application.

[0057] This application embodiment also provides a high-voltage cascade system, wherein the aforementioned fiber optic ring network topology communication system is employed. The high-voltage cascade system includes multiple link modules, and each link module exchanges data with the control module in real time. The fiber optic ring network topology communication system includes:

[0058] Multiple power units within the link compartment are connected end-to-end via a first optical fiber to form a ring network, and then connected to the controller in the control compartment via a second optical fiber. These multiple power units include power unit 1, power unit 2, ..., and power unit n.

[0059] After the first optical fiber is connected to the power unit n, ... the power unit 2 and the power unit 1 respectively, it is uploaded sequentially through the first optical fiber and finally summarized to the power unit 1.

[0060] In some embodiments, the second optical fiber includes two optical fibers with bidirectional transmission paths.

[0061] In some embodiments, the two optical fibers of the second optical fiber enable bidirectional transmission.

[0062] In some embodiments, a communication loop is used within the link compartment, and the communication of multiple power units is serialized in the same communication link.

[0063] In some embodiments, the power unit is used for DC conversion and power transmission.

[0064] In some embodiments, the controller is used to handle the coordinated control and data analysis of the high-voltage cascaded system.

[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 ring network topology communication system suitable for high-voltage cascaded systems, wherein, The high-voltage cascade system includes multiple link modules, and each link module exchanges data with the control module in real time. The fiber optic ring network topology communication system includes: Multiple power units within the chain link compartment are connected end-to-end via the first optical fiber, forming a ring network, and then connected to the controller in the control compartment via the second optical fiber.

2. The fiber optic ring network topology communication system as described in claim 1, wherein, The plurality of power units includes power unit 1, power unit 2, ... and power unit n. After the first optical fiber is connected to the power unit n, ... the power unit 2 and the power unit 1 respectively, it is uploaded sequentially through the first optical fiber and finally summarized to the power unit 1.

3. The fiber optic ring network topology communication system as described in claim 2, wherein, The second optical fiber includes two optical fibers with bidirectional transmission paths.

4. The fiber optic ring network topology communication system as described in claim 3, wherein, The two optical fibers of the second optical fiber enable bidirectional transmission.

5. The fiber optic ring network topology communication system as described in claim 1, wherein, The communication loop is used in the link compartment so that the communication of multiple power units is serialized in the same communication link.

6. The fiber optic ring network topology communication system as described in claim 1, wherein, The power unit is used for DC conversion and power transmission.

7. The fiber optic ring network topology communication system as described in claim 1, wherein, The controller is used to handle the coordinated control and data analysis of the high-voltage cascade system.

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