Bus protection suitable for double-bus three-section wiring

Abstract

The utility model discloses a bus protection suitable for double-bus three-section wiring, which comprises a first bus and a second bus, each bus is divided into three sections, the sections of buses are connected through bus tie intervals and section intervals, section breakers are arranged at the section intervals, and bus tie breakers are arranged at the bus tie intervals. The system is combined with a bus coupler through sections to form a complete bus protection structure, so that faults can be quickly positioned and removed, and the faults are prevented from spreading to other sections. Elements such as an isolating switch, a grounding switch and a current transformer are arranged in each section interval, so that the safety and the maintenance convenience of the system are guaranteed. The utility model is suitable for various operation modes, and can meet the complex protection requirements of double-bus three-section wiring. The system has the characteristics of high operation flexibility and high reliability, remarkably improves the power supply capacity and the operation safety of the power grid, provides technical guarantee for safe and stable operation of the power grid, and has remarkable economic and social benefits.

Description

Technical Field

[0001] This utility model relates to the field of power, specifically to a busbar protection system suitable for a double busbar three-section connection. Background Technology

[0002] As a key technology in power systems, relay protection can quickly detect and take corresponding measures when system faults or anomalies occur, such as clearing faults, terminating abnormal operation, or issuing alarm signals. Relay protection plays an irreplaceable role in ensuring the safe operation of the power grid and reducing power outage time and scope.

[0003] With rapid socio-economic development and accelerated urbanization, the demand for electricity has increased significantly. To meet this growing demand, my country has accelerated the construction of its power system, resulting in a continuously expanding power grid and an increasingly complex transmission and distribution system structure. In this process, ensuring the safety, reliability, and flexibility of the power grid has become a key focus and challenge in power system design and operation.

[0004] Especially in large cities and industrial parks, where population density is high and electricity load is high, the requirements for power system operation are more stringent. In this environment, traditional single-busbar and double-busbar connection methods are no longer sufficient to meet the needs. To improve power supply reliability and flexibility, various improved connection methods have emerged, such as double-busbar single-section, double-busbar double-section, and the more complex double-busbar three-section connection.

[0005] The three-section double busbar connection, as an unconventional electrical wiring scheme, features flexible operation, strong adaptability, and high reliability. However, it also makes the protection and control design of power systems more complex. Currently, traditional busbar protection schemes applicable to double busbar, single-section double busbar, or double-section double busbar connections are insufficient to meet the requirements of the three-section double busbar connection, mainly in the following aspects:

[0006] Protection dead zone problem: Existing bus protection devices cannot effectively cover the cross-area between sections, which may result in some faults not being detected or isolated in time.

[0007] Complex operating modes: The double busbar three-section wiring supports multiple operating modes (such as single busbar operation, double busbar operation and double busbar with sections operating simultaneously), requiring the protection system to be able to adapt to the fault location and isolation requirements under different modes.

[0008] Reliability and rapid response: In complex wiring configurations, protection devices are required to have higher rapid response capabilities and reliability, enabling them to quickly isolate the faulty area when a fault occurs and ensure normal power supply to unaffected areas.

[0009] To address the aforementioned issues, there is an urgent need for a specially designed busbar protection system capable of adapting to the characteristics of a dual-busbar three-section connection, providing full-coverage protection, and quickly and accurately isolating the faulty area in the event of a fault, thus ensuring the safe operation of the power system. The technical solution proposed in this patent addresses this need, aiming to overcome the shortcomings of existing technologies and further improve the operational reliability and safety of complex power systems. Summary of the Invention

[0010] The purpose of this utility model is to provide a busbar protection system suitable for a double busbar three-section connection, thereby solving the problem mentioned in the background art that currently available commercially available busbar protection devices cannot meet the protection requirements of a double busbar three-section connection. This utility model is achieved through the following technical solution:

[0011] This utility model provides a busbar protection system suitable for a double busbar three-section connection, comprising two busbars, characterized in that: the two busbars are respectively divided into three sections, one busbar is divided into a first busbar first section, a first busbar second section and a first busbar third section, and the other busbar is divided into a second busbar first section, a second busbar second section and a second busbar third section;

[0012] The first section of the first busbar and the first section of the second busbar each have a segmented branch, and the first section of the first busbar and the first section of the second busbar are interconnected to form the protection of the first busbar.

[0013] The first busbar third section and the second busbar third section each have a segmented branch, and the first busbar third section and the second busbar third section are interconnected to form the third busbar protection.

[0014] The first busbar second section and the second busbar second section are simultaneously connected to the four aforementioned segmented branches, and the first busbar second section and the second busbar second section are connected to each other, together forming the second busbar protection.

[0015] This invention adopts a double busbar with three sections, a common and reliable busbar structure in power systems. By dividing each busbar into three sections, the flexibility and reliability of the busbar system can be improved. Each section is managed through section protection and bus tie protection, ensuring that in the event of a fault, only the specific section is affected, and the fault does not spread to the entire busbar system.

[0016] In addition, the connection between each section is designed to be compact and can adapt to a variety of operating modes, such as single busbar operation, double busbar operation, or single busbar and double busbar with sections operating at the same time, in order to meet different load requirements and operating environments.

[0017] Furthermore, the first section of the first busbar and the first section of the second busbar are connected by a first bus tie bay, and the first bus tie bay includes a first bus tie circuit breaker.

[0018] The second section of the first busbar and the second section of the second busbar are connected by a second bus tie interval, which includes a second bus tie circuit breaker.

[0019] The third section of the first busbar and the third section of the second busbar are connected by a third bus tie bay, which includes a third bus tie circuit breaker.

[0020] The first bus tie bay and its first bus tie circuit breaker are used to interconnect the first sections of the two busbars, ensuring that in the event of a fault in one section, power can be quickly switched to the other busbar section. The same applies to the remaining two sections.

[0021] The bus tie circuit breaker not only supports manual switching but also enables rapid response through an automated control system, reducing system downtime. The design of the bus tie bay further enhances operational safety and reliability, preventing the entire bus system from being paralyzed due to misoperation or short circuits.

[0022] Furthermore, the first section of the first busbar and the second section of the first busbar are connected by a first segment bay of the first busbar, and the first segment bay of the first busbar includes a first segment circuit breaker;

[0023] The second section of the first busbar and the third section of the first busbar are connected by a second section bay of the first busbar, and the second section bay of the first busbar includes a second section circuit breaker;

[0024] The aforementioned first bus tie bay and first bus tie circuit breaker are located at the front end of the first section bay of the first busbar;

[0025] The aforementioned second bus tie bay and second bus tie circuit breaker are located between the first section bay of the first bus and the second section bay of the first bus;

[0026] The aforementioned third bus tie bay and third bus tie circuit breaker are located at the rear end of the second section bay of the first bus.

[0027] The first section of the second busbar and the second section of the second busbar are connected by the first segment bay of the second busbar, and the first segment bay of the second busbar includes a third segment circuit breaker;

[0028] The second section of the second busbar and the third section of the second busbar are connected by a second section bay of the second busbar, and the second section bay of the second busbar includes a fourth section circuit breaker;

[0029] The aforementioned first bus tie bay and first bus tie circuit breaker are located at the front end of the first section bay of the second busbar;

[0030] The aforementioned second bus tie bay and second bus tie circuit breaker are located between the first section bay of the second bus and the second section bay of the second bus.

[0031] The aforementioned third bus tie bay and third bus tie circuit breaker are located at the rear end of the second section bay of the second bus.

[0032] The existence of the first section bay of the first busbar and its first section circuit breaker allows for independent control of power transmission between the first section and the second section of the first busbar. When maintenance is required on a particular section, its corresponding section bay can isolate the faulty section, ensuring the normal operation of other sections. This design significantly improves the maintainability and operational safety of the system.

[0033] Specifically, by setting the first segment interval and the second segment interval of the first busbar at the front, middle and rear ends of the first busbar respectively, and setting the first segment interval and the second segment interval of the second busbar at the front, middle and rear ends of the second busbar respectively, the segments are physically and functionally independent, while working closely together during normal operation.

[0034] Furthermore, the segmented branches of the first section of the first busbar are: the first segmented bay of the first busbar and the first segmented circuit breaker included therein;

[0035] The segmented branches of the first section of the second busbar mentioned above are: the first segment bay of the second busbar and the third segment circuit breaker included therein;

[0036] The segmented branches of the third section of the first busbar mentioned above are: the second segment bay of the first busbar and the second segment circuit breaker included therein;

[0037] The segmented branches of the third section of the second busbar mentioned above are: the second segment bay of the second busbar and the fourth segment circuit breaker included therein.

[0038] Each segmented branch system consists of corresponding segmented bays and circuit breakers, enabling it to quickly identify and interrupt fault currents. This protection scheme can significantly reduce system damage caused by short circuits or overloads and ensure the continuity of power supply to the greatest extent possible.

[0039] For example, when a short circuit occurs in the first section of the first busbar, the first section circuit breaker will trip quickly, while the first section bay of the first busbar provides additional physical isolation to ensure that the impact of the fault is minimized. The protection function of the first section of the second busbar is undertaken by the first section bay of the second busbar and the third section circuit breaker. Similar design logic applies to all section protection.

[0040] Furthermore, the first bus tie circuit breaker, the second bus tie circuit breaker, the third bus tie circuit breaker, the first section circuit breaker, the second section circuit breaker, the third section circuit breaker, and the fourth section circuit breaker are each equipped with a corresponding operating pressure plate.

[0041] Operating panels are important auxiliary devices used to control the start and stop of circuit breakers. Each circuit breaker is equipped with a corresponding operating panel, allowing operators to manually operate it in emergencies. Operating panels are also used to lock the relevant circuit breakers during maintenance or testing to prevent accidental operation. Furthermore, the operating panels, combined with status indicator lights and electronic tags, can visually display the circuit breaker's operating status, further enhancing system controllability and safety.

[0042] Furthermore, the aforementioned first bus tie bay, second bus tie bay, third bus tie bay, first busbar first section bay, first busbar second section bay, second busbar first section bay, and second busbar second section bay have the same construction, and in addition to the corresponding circuit breakers, they respectively include:

[0043] Disconnecting switch: The above-mentioned disconnecting switch can further isolate the bus section after the circuit is broken; it can provide physical isolation after the circuit breaker trips, further ensuring the safety of the maintenance process.

[0044] Grounding switch: The above-mentioned grounding switch can ground the bus section before maintenance to eliminate residual voltage; it can connect the ground wire before inspection or maintenance to eliminate residual voltage in the equipment, thereby preventing electric shock accidents.

[0045] Current transformers: The aforementioned current transformers are communicatively connected to their respective bus tie circuit breakers or sectional circuit breakers, providing current signals. The current transformers can collect bus current signals in real time and transmit them to protection devices for fault location, overload detection, and system optimization scheduling.

[0046] Furthermore, the aforementioned first bus tie circuit breaker, second bus tie circuit breaker, third bus tie circuit breaker, first section circuit breaker, second section circuit breaker, third section circuit breaker, and fourth section circuit breaker are all tie circuit breakers. Tie circuit breakers are used to connect and disconnect different bus sections, possessing extremely high breaking capacity and fast-acting characteristics. Through the coordinated operation of these circuit breakers, flexible switching between sections can be achieved, and fault points can be quickly isolated in the event of a system fault, ensuring the stable operation of the power system. They also support remote monitoring, automated control functions, and high-precision status feedback functions. The beneficial effects of this utility model are: meeting the protection requirements of a double busbar three-section connection, this...

[0047] This utility model is specifically designed for double busbar three-section wiring, which can fully cover the protection area under complex wiring configurations. It effectively solves the problems of protection dead zone and insufficient response speed of traditional busbar protection in this type of wiring, and provides a reliable protection solution for the practical application of double busbar three-section wiring.

[0048] To enhance operational flexibility and reliability, this busbar protection device, through the coordinated design of sectional protection and bus tie protection, can adapt to various operating modes (such as single busbar operation, double busbar operation, or double busbars with sectional protection simultaneously), significantly improving the operational flexibility of primary electrical wiring. Simultaneously, the device boasts high response speed and protection accuracy, enabling rapid isolation of faulty areas and ensuring the normal operation of fault-free parts of the system, thereby significantly improving the system's operational reliability.

[0049] Supporting the needs of power grid construction and enhancing power supply capacity, this utility model optimizes busbar protection design, adapting to double busbar three-section wiring with higher operating loads and more complex structures. It provides technical support for the expansion of power grid construction towards higher reliability and higher load capacity. Its widespread application will effectively improve the power supply capacity of the power grid, ensuring a smooth response to the ever-increasing electricity demands of modern cities and industrial areas.

[0050] To ensure the safe and stable operation of the power grid, this utility model can quickly locate and isolate faults, reduce the impact of faults on the entire power grid system, provide a reliable foundation for the safe and stable operation of the power grid, ensure the continuity of power supply for users, and avoid economic losses and social impacts caused by power outages.

[0051] Significant economic and social benefits: The implementation of this technical solution helps reduce the risk of power grid operation failures and maintenance costs, improves the overall operating efficiency of the power grid, and brings significant economic benefits to power companies and users. At the same time, the improved power supply reliability will greatly meet the high-standard electricity demands of social production and residential life, generating broad social benefits. Attached Figure Description

[0052] Figure 1 : A schematic diagram of the structure of this utility model;

[0053] Figure 2 : A schematic diagram of the structure of the first busbar protection of this utility model; Figure 3 : A schematic diagram of the structure of the second busbar protection of this utility model; Figure 4 : A schematic diagram of the structure of the third busbar protection of this utility model;

[0054] In the diagram: 101 - First busbar section 1, 102 - First busbar section 2, 103 - First busbar section 3, 201 - Second busbar section 1, 202 - Second busbar section 2, 203 - Second busbar section 3, 301 - First bus tie bay, 302 - Second bus tie bay, 303 - Third bus tie bay, 304 - First bus tie circuit breaker, 305 - Second bus tie circuit breaker, 306 - Third bus tie circuit breaker, 401 - First busbar section 1 bay, 402 - First busbar section 2 bay, 403 - First section circuit breaker, 404 - Second section circuit breaker, 501 - Second busbar section 1 bay, 502 - Second busbar section 2 bay, 503 - Third section circuit breaker, 504 - Fourth section circuit breaker. Detailed Implementation

[0055] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0056] Example: Figure 1-4 As shown, a busbar protection system suitable for a double busbar three-section connection includes two busbars, characterized in that: the two busbars are respectively divided into three sections, one busbar is divided into a first busbar first section 101, a first busbar second section 102 and a first busbar third section 103, and the other busbar is divided into a second busbar first section 201, a second busbar second section 202 and a second busbar third section 203;

[0057] The first busbar segment 101 and the second busbar segment 201 mentioned above each have a segmented branch, and the first busbar segment 101 and the second busbar segment 201 are interconnected to jointly constitute the protection of the first busbar;

[0058] The first busbar third segment 103 and the second busbar third segment 203 mentioned above each have a segmented branch, and the first busbar third segment 103 and the second busbar third segment 203 are interconnected to jointly form the third busbar protection;

[0059] The first busbar second segment 102 and the second busbar second segment 202 are simultaneously connected to the four aforementioned segmented branches, and the first busbar second segment 102 and the second busbar second segment 202 are connected to each other to form the second busbar protection.

[0060] This utility model adopts a double busbar three-section wiring configuration, which is a common configuration in power systems.

[0061] Furthermore, it features a reliable busbar structure. By dividing each busbar into three sections, the flexibility and reliability of the busbar system can be improved. Each section is managed through section protection and bus tie protection, ensuring that in the event of a fault, only the specific section is affected, and the fault does not spread to the entire busbar system.

[0062] In addition, the connection between each section is designed to be compact and can adapt to a variety of operating modes, such as single busbar operation, double busbar operation, or single busbar and double busbar with sections operating at the same time, in order to meet different load requirements and operating environments.

[0063] The first section 101 of the first busbar and the first section 201 of the second busbar are connected by a first bus tie bay 301, which includes a first bus tie circuit breaker 304.

[0064] The first busbar second section 102 and the second busbar second section 202 are connected by a second bus tie bay 302, which includes a second bus tie circuit breaker 305.

[0065] The third section 103 of the first busbar and the third section 203 of the second busbar are connected by a third bus tie bay 303, which includes a third bus tie circuit breaker 306.

[0066] The first bus tie bay 301 and its first bus tie circuit breaker 304 are used to interconnect the first sections of the two busbars, so that when a fault occurs in one section, power can be quickly switched to the other busbar section. The same applies to the remaining two sections.

[0067] The bus tie circuit breaker not only supports manual switching but also enables rapid response through an automated control system, reducing system downtime. The design of the bus tie bay further enhances operational safety and reliability, preventing the entire bus system from being paralyzed due to misoperation or short circuits.

[0068] The first section 101 and the second section 102 of the first busbar are connected by a first section bay 401, which includes a first section circuit breaker 403.

[0069] The first busbar second section 102 and the first busbar third section 103 are connected by the first busbar second section bay 402, which includes a second section circuit breaker 404; the first bus tie bay 301 and the first bus tie circuit breaker 304 are located at the front end of the first busbar first section bay 401.

[0070] The aforementioned second bus tie bay 302 and second bus tie circuit breaker 305 are located between the first bus first section bay 401 and the first bus second section bay 402;

[0071] The aforementioned third bus tie bay 303 and third bus tie circuit breaker 306 are located at the rear end of the second section bay 402 of the first bus.

[0072] The first section 201 and the second section 202 of the second busbar are connected by the first segment bay 501 of the second busbar, and the first segment bay 501 of the second busbar includes a third segment circuit breaker 503.

[0073] The second section 202 of the second busbar and the third section 203 of the second busbar are connected by the second section bay 502 of the second busbar, and the second section bay 502 of the second busbar includes a fourth section circuit breaker 504.

[0074] The aforementioned first bus tie bay 301 and first bus tie circuit breaker 304 are located at the front end of the first section bay 501 of the second bus;

[0075] The aforementioned second bus tie bay 302 and second bus tie circuit breaker 305 are located between the first section bay 501 of the second bus and the second section bay 502 of the second bus.

[0076] The aforementioned third bus tie bay 303 and third bus tie circuit breaker 306 are located at the rear end of the second bus second section bay 502.

[0077] The presence of segmented bay 401 and the first segmented circuit breaker 403 allows for independent control of power transmission between the first busbar segment 101 and the first busbar segment 102. When maintenance is required on a particular segment, its corresponding segmented bay 401 can isolate the faulty segment, ensuring the normal operation of other segments. This design significantly improves the maintainability and operational safety of the system.

[0078] Specifically, by setting the first segment interval 401 and the second segment interval 402 of the first busbar at the front, middle and rear ends of the first busbar respectively, and setting the first segment interval 501 and the second segment interval 502 of the second busbar at the front, middle and rear ends of the second busbar respectively, each segment is physically and functionally independent, while being able to work closely together during normal operation.

[0079] The segmented branches of the first section 101 of the first busbar mentioned above are: the first section bay 401 of the first busbar and the first section circuit breaker 403 included therein;

[0080] The segmented branches of the first section 201 of the second busbar mentioned above are: the first section bay 501 of the second busbar and the third section circuit breaker 503 included therein;

[0081] The segmented branches of the third section 103 of the first busbar mentioned above are: the second section bay 402 of the first busbar and the second section circuit breaker 404 included therein;

[0082] The segmented branches of the third section 203 of the second busbar mentioned above are: the second section bay 502 of the second busbar and the fourth section circuit breaker 504 included therein.

[0083] Each segmented branch system consists of corresponding segmented bays and circuit breakers, enabling it to quickly identify and interrupt fault currents. This protection scheme can significantly reduce system damage caused by short circuits or overloads and ensure the continuity of power supply to the greatest extent possible.

[0084] For example, when a short circuit occurs in the first section 101 of the first busbar, the first sectional circuit breaker 403 will trip quickly, while the first section bay 401 of the first busbar provides additional physical isolation to ensure that the impact of the fault is minimized. The protection function of the first section 201 of the second busbar is undertaken by the first section bay 501 of the second busbar and the third sectional circuit breaker 503. Similar design logic applies to all section protections.

[0085] The first bus tie circuit breaker 304, the second bus tie circuit breaker 305, the third bus tie circuit breaker 306, the first sectional circuit breaker 403, the second sectional circuit breaker 404, the third sectional circuit breaker 503, and the fourth sectional circuit breaker 504 are each equipped with a corresponding operating pressure plate.

[0086] Operating panels are important auxiliary devices used to control the start and stop of circuit breakers. Each circuit breaker is equipped with a corresponding operating panel, allowing operators to manually operate it in emergencies. Operating panels are also used to lock the relevant circuit breakers during maintenance or testing to prevent accidental operation. Furthermore, the operating panels, combined with status indicator lights and electronic tags, can visually display the circuit breaker's operating status, further enhancing system controllability and safety.

[0087] The aforementioned first busbar bay 301, second busbar bay 302, third busbar bay 303, first busbar first segment bay 401, first busbar second segment bay 402, second busbar first segment bay 501, and second busbar second segment bay 502 have the same structure and respectively include:

[0088] Disconnecting switch: The above-mentioned disconnecting switch can further isolate the bus section after the circuit is broken; it can provide physical isolation after the circuit breaker trips, further ensuring the safety of the maintenance process.

[0089] Grounding switch: The above-mentioned grounding switch can ground the bus section before maintenance to eliminate residual voltage; it can connect the ground wire before inspection or maintenance to eliminate residual voltage in the equipment, thereby preventing electric shock accidents.

[0090] Current transformers: The aforementioned current transformers are communicatively connected to their respective bus tie circuit breakers or sectional circuit breakers, providing current signals. The current transformers can collect bus current signals in real time and transmit them to protection devices for fault location, overload detection, and system optimization scheduling.

[0091] The aforementioned first bus tie circuit breaker 304, second bus tie circuit breaker 305, third bus tie circuit breaker 306, first section circuit breaker 403, second section circuit breaker 404, third section circuit breaker 503, and fourth section circuit breaker 504 are all tie circuit breakers. Tie circuit breakers are used to connect and disconnect different bus sections, possessing extremely high breaking capacity and fast-acting characteristics. Through the coordinated operation of these circuit breakers, flexible switching between sections can be achieved, and fault points can be quickly isolated in the event of a system fault, ensuring the stable operation of the power system. They also support remote monitoring, automated control functions, and high-precision status feedback functions.

[0092] In summary, this utility model patent designs a complete busbar protection system for a double busbar three-section wiring structure. By dividing the system into three sections and introducing bus tie intervals and section intervals, it ensures flexibility and reliability under different operating modes. The complete operation process and working principle of the system are described below.

[0093] Initial configuration and operation mode switching

[0094] The system consists of two buses, each divided into three segments:

[0095] The first busbar is divided into the first segment 101, the second segment 102, and the third segment 103. The second busbar is divided into the first segment 201, the second segment 202, and the third segment 203.

[0096] Each section consists of a corresponding section bay and a circuit breaker. Each section is connected to the bus tie circuit breaker via the bus tie bay. In the initial configuration, all circuit breakers are in the closed state, and the system operates in a dual-bus joint operation mode.

[0097] When it is necessary to switch operating modes, the following operating modes can be achieved by operating the bus tie plate, sectional plate, and circuit breaker:

[0098] Single busbar operation: All circuit breakers on one busbar are shut down, while only the other busbar is kept powered.

[0099] Dual busbar operation: Two busbars jointly bear the load, and power distribution is achieved through bus tie circuit breakers.

[0100] Dual busbars with segmented operation: each segment is partially powered to meet complex operational needs.

[0101] Power distribution during normal operation

[0102] Segmented power transmission: Power is transmitted between segments through segmented intervals, such as the first segmented interval 401 of the first busbar and the first segmented interval 501 of the second busbar. The circuit breaker remains closed during normal operation to ensure seamless power transmission.

[0103] Bus tie protection: Bus tie circuit breakers such as the first bus tie circuit breaker 304, the second bus tie circuit breaker 305, and the third bus tie circuit breaker 306 are connected to the same level sections of adjacent busbars through bus tie intervals. For example, the first section 101 of the first busbar and the first section 201 of the second busbar are connected to each other to help distribute the current evenly when the load is unbalanced.

[0104] Troubleshooting process

[0105] When a fault occurs on any bus or section, the system quickly isolates the fault and restores power supply through the following process:

[0106] 3.1 Fault Detection

[0107] Each section is equipped with a current transformer to monitor the current signal in real time and transmit it to the protection device. The bus protection differential circuit includes large differential protection and small differential protection.

[0108] Large differential protection: The overall differential circuit composed of the currents of all branches monitors the operating status of the entire busbar.

[0109] Differential protection: A differential circuit formed by the branch current within a specific segment, used to accurately locate segment faults.

[0110] 2 Fault Isolation

[0111] When a short circuit or overload is detected in a certain section, the fault protection system immediately disconnects the circuit breaker of that section. For example, when a short circuit occurs in the first section 101 of the first busbar:

[0112] The first section circuit breaker 403 tripped, isolating the first section 101 of the first busbar.

[0113] The first section bay 401 of the first busbar further provides physical isolation to prevent the fault from affecting the second section 102 of the first busbar.

[0114] At the same time, the bus tie circuit breaker, such as the first bus tie circuit breaker 304, switches to the linkage mode, and maintains the normal operation of the rest of the system by connecting adjacent bus sections for segmented power supply.

[0115] 3 System Recovery

[0116] After troubleshooting, the circuit breaker can be restarted remotely or manually to restore normal operation. The status indicator lights on the bus tie plate and section tie plate show the current operating mode, and operators can adjust the bus configuration as needed.

[0117] Multiple protection design

[0118] Disconnecting switches and grounding switches:

[0119] After the fault is isolated, the isolating switch disconnects the electrical connection between the section and the system, and the grounding switch connects the ground wire to eliminate residual voltage in the equipment and ensure maintenance safety.

[0120] High reliability of interconnecting circuit breakers:

[0121] All circuit breakers, such as the first bus tie circuit breaker 304 and the first sectional circuit breaker 403, are designed with high breaking capacity and support automated control and remote monitoring.

[0122] The status feedback function of the circuit breaker provides data support for fault analysis and operation optimization.

[0123] Optimize scheduling and scalability

[0124] In normal operation, the data collected by the current transformer can be used to optimize scheduling. For example, the state of the bus tie circuit breaker can be dynamically adjusted according to load changes to balance the load distribution between the two busbars. The system has a compact and modular structure, supporting future expansion or modification, such as adding sections or upgrading protection devices.

[0125] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A busbar protection system suitable for a double busbar three-section connection, comprising two busbars, characterized in that: The two busbars are each divided into three segments, of which: The first busbar is divided into the first busbar first segment (101), the first busbar second segment (102) and the first busbar third segment (103); The second busbar is divided into the first section (201), the second section (202), and the third section (203). The first busbar first segment (101) and the second busbar first segment (201) each have a segmented branch, and the first busbar first segment (101) and the second busbar first segment (201) are interconnected to form the first busbar protection; The third section (103) of the first busbar and the third section (203) of the second busbar each have a segmented branch, and the third section (103) of the first busbar and the third section (203) of the second busbar are interconnected to form the third busbar protection. The first busbar second segment (102) and the second busbar second segment (202) are simultaneously connected to the four segmented branches, and the first busbar second segment (102) and the second busbar second segment (202) are connected to form the second busbar protection.

2. The busbar protection applicable to a double busbar three-section connection according to claim 1, characterized in that: The first busbar first section (101) and the second busbar first section (201) are connected by a first bus tie bay (301), and the first bus tie bay (301) includes a first bus tie circuit breaker (304). The second section (102) of the first busbar and the second section (202) of the second busbar are connected by a second bus tie bay (302), and the second bus tie bay (302) includes a second bus tie circuit breaker (305). The third section (103) of the first busbar and the third section (203) of the second busbar are connected by a third bus tie bay (303), which includes a third bus tie circuit breaker (306).

3. The busbar protection applicable to a double busbar three-section connection according to claim 2, characterized in that: The first section (101) of the first busbar and the second section (102) of the first busbar are connected by the first section bay (401) of the first busbar, and the first section bay (401) of the first busbar includes a first section circuit breaker (403). The second section (102) of the first busbar and the third section (103) of the first busbar are connected by the second section bay (402) of the first busbar, and the second section bay (402) of the first busbar includes a second section circuit breaker (404). The first bus joint interval (301) is located at the front end of the first busbar first segment interval (401); The second bus tie bay (302) and the second bus tie circuit breaker (305) are located between the first bus first section bay (401) and the first bus second section bay (402); The third bus tie bay (303) and the third bus tie circuit breaker (306) are located at the rear end of the second section bay (402) of the first bus; The first section (201) of the second busbar and the second section (202) of the second busbar are connected by the first segment bay (501) of the second busbar, and the first segment bay (501) of the second busbar includes a third segment circuit breaker (503). The second section (202) of the second busbar and the third section (203) of the second busbar are connected by the second section bay (502) of the second busbar, and the fourth section circuit breaker (504) of the second section bay (502) of the second busbar. The first bus tie bay (301) and the first bus tie circuit breaker (304) are located at the front end of the first section bay (501) of the second bus; The second bus tie bay (302) and the second bus tie circuit breaker (305) are located between the first section bay (501) of the second bus and the second section bay (502) of the second bus; The third bus tie bay (303) and the third bus tie circuit breaker (306) are located at the rear end of the second bus tie bay (502).

4. The busbar protection applicable to a double busbar three-section connection according to claim 3, characterized in that: The first busbar first section (101) has the following segmented branches: the first busbar first segment bay (401) and its included first segment circuit breaker (403). The first section (201) of the second busbar has the following segmented branches: the first segmented bay (501) of the second busbar and the third segmented circuit breaker (503) included therein. The first busbar third section (103) has the following segmented branches: the first busbar second segment bay (402) and its included second segment circuit breaker (404). The second busbar third section (203) has the following segmented branches: the second busbar second section bay (502) and its included fourth section circuit breaker (504).

5. The busbar protection applicable to a double busbar three-section connection according to claim 3, characterized in that: The first bus tie circuit breaker (304), the second bus tie circuit breaker (305), the third bus tie circuit breaker (306), the first section circuit breaker (403), the second section circuit breaker (404), the third section circuit breaker (503), and the fourth section circuit breaker (504) are each equipped with a corresponding operating pressure plate.

6. The busbar protection applicable to a double busbar three-section connection according to claim 3, characterized in that: The first bus joint bay (301), the second bus joint bay (302), the third bus joint bay (303), the first busbar first segment bay (401), the first busbar second segment bay (402), the second busbar first segment bay (501), and the second busbar second segment bay (502) have the same structure and each further includes: Disconnecting switch: The disconnecting switch can further isolate the bus section after the circuit is broken; Grounding switch: The grounding switch can ground the bus section before maintenance to eliminate residual voltage; Current transformer: The current transformer is communicatively connected to the corresponding bus tie circuit breaker or sectional circuit breaker to provide current signals.

7. The busbar protection applicable to a double busbar three-section connection according to claim 3, characterized in that: The first bus tie circuit breaker (304), the second bus tie circuit breaker (305), the third bus tie circuit breaker (306), the first section circuit breaker (403), the second section circuit breaker (404), the third section circuit breaker (503), and the fourth section circuit breaker (504) are all tie circuit breakers.

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