Switch cabinet bus connection monitoring device
By setting up a current transformer on the main busbar of the switch cabinet busbar and monitoring its data, the shortcomings of bus connection status monitoring in the prior art are solved, real-time, accurate and fast monitoring is achieved, and the stability of the power system is improved and security.
Patent Information
- Application Number
- CN202420938933.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-30
Smart Images
Figure CN222439646U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of switch cabinets, in particular to a switch cabinet busbar connection monitoring device. Background Art
[0002] In the power system, the switchgear busbar is an important component for power transmission and distribution. Its operation stability and safety are crucial to the stable operation of the entire power system. However, the existing switchgear busbar connection monitoring device has some difficulties and defects in practical application, which are mainly reflected in the following aspects:
[0003] 1. Limitations of monitoring methods
[0004] Traditional switchgear busbar connection monitoring mainly relies on manual inspections and regular power outage inspections. This monitoring method is not only inefficient, but also difficult to accurately grasp the status of the busbar connection in real time. Especially when measuring live, due to the high busbar voltage and current, it brings great safety risks to the staff.
[0005] Second, the lack of monitoring accuracy
[0006] Existing connection monitoring devices can often only monitor the macroscopic state of busbar connections, such as busbar temperature, insulation resistance, etc. However, it is often difficult to accurately monitor the microscopic state of busbar connections, such as contact resistance, looseness, etc. This leads to inaccurate judgment of the busbar connection state, which is prone to misjudgment and missed judgment.
[0007] 3. Delay in response speed
[0008] When an abnormality occurs in the busbar connection, existing monitoring devices often have difficulty responding quickly. On the one hand, due to the limitations of monitoring methods, it is difficult to detect abnormalities in real time; on the other hand, even if an abnormality is found, manual intervention and processing are required, which further prolongs the response time. This may cause the power system to be unstable for a period of time, or even cause safety accidents.
[0009] 4. Lagging behind in technological innovation
[0010] With the continuous development of power system technology, the requirements for switchgear busbar connection monitoring are getting higher and higher. However, the existing connection monitoring devices lag behind in terms of technological innovation. On the one hand, there is a lack of monitoring technology for new busbar structures; on the other hand, there is a lack of continuous innovation and improvement in the monitoring technology for existing busbar structures. This leads to deficiencies in the performance, reliability and intelligence of the monitoring devices.
[0011] Taking CN 207719770 U as an example, although the structure solves the problem of poor heat dissipation of the busbar to a certain extent, it still has the above difficulties and defects in connection monitoring. Therefore, developing a new switch cabinet busbar connection monitoring device to achieve real-time, accurate and rapid monitoring of the busbar connection status is of great significance to improving the stability and safety of the power system. Summary of the invention
[0012] The purpose of the utility model is to provide a switch cabinet bus connection monitoring device, aiming to achieve real-time, accurate and rapid monitoring of the bus connection status, improve the stability and safety of the power system, and solve the shortcomings of the existing switch cabinet bus connection monitoring device in terms of monitoring means, monitoring accuracy, response speed and technical innovation.
[0013] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0014] A switch cabinet bus connection monitoring device, the switch cabinet bus comprises a main busbar and a branch busbar, a group of main busbars are provided and are arranged opposite to each other, a heat dissipation gap is formed between the main busbars, the branch busbar is fixedly connected to the main busbar, the branch busbar is connected to two main busbars, a first current transformer and a second current transformer are respectively provided on the two oppositely arranged main busbars, and the connection status of the main busbar is judged by monitoring and comparing the signals of the first current transformer and the second current transformer.
[0015] The current data detected by the first current transformer and the second current transformer are sent to the controller, and the controller determines the connection status of the main busbar by comparing the current data detected by the two transformers.
[0016] The first current transformer and the second current transformer are electrically connected to the analog quantity module, and the analog quantity module is communicatively connected to the controller.
[0017] The controller is connected to the human-machine interaction screen for communication.
[0018] The output terminal of the controller mentioned above is connected to an intermediate relay, and the intermediate relay is used to control the sound and light alarm.
[0019] The above controller is connected to the remote host computer for communication.
[0020] The utility model provides a switch cabinet bus connection monitoring device, which arranges a current transformer on each main busbar arranged in pairs, and all branch buses are connected to the two busbars, and monitors the data of the two transformers to determine whether the main busbar has false connection, arc and other phenomena, and obtains high-precision monitoring results through data conversion and data processing of the controller. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0022] Figure 1 This is a schematic diagram of the busbar structure of the utility model;
[0023] Figure 2 It is the electrical schematic diagram of the utility model;
[0024] Figure 3 It is the control circuit of the sound and light alarm.
[0025] In the figure: main busbar 1, branch busbar 2, first current transformer 3, second current transformer 4, first fixing plate 5, second fixing plate 6, heat dissipation gap 7, heat dissipation device 8, controller 9, analog module 10, human-computer interaction screen 11, remote host computer 12, intermediate relay 13, sound and light alarm 14. DETAILED DESCRIPTION
[0026] like Figure 1-3 As shown in the figure, a switch cabinet bus connection monitoring device is provided. The switch cabinet bus includes a main busbar 1 and a branch busbar 2. The main busbar 1 is provided with a group and is arranged relatively. A heat dissipation gap 7 is formed between the main busbars 1. The branch busbar 2 is fixedly connected to the main busbar 1. The branch busbar 2 is connected to the two main busbars 1. A first current transformer 3 and a second current transformer 4 are respectively provided on the two relatively arranged main busbars 1. The connection status of the main busbar 1 is judged by monitoring and comparing the signals of the first current transformer 3 and the second current transformer 4.
[0027] The branch bus 2 is connected to both main busbars 1, that is, all loads are connected to the busbar, then the two main busbars 1 evenly bear the load current, the current detected by the first current transformer 3 and the second current transformer 4 should be equal, when the difference between the two exceeds the set range, it means that there is a problem with one connection in the main busbar 1.
[0028] The current data detected by the first current transformer 3 and the second current transformer 4 are sent to the controller 9 , and the controller 9 determines the connection status of the main busbar 1 by comparing the current data detected by the two transformers.
[0029] The first current transformer 3 and the second current transformer 4 are electrically connected to the analog quantity module 10 , and the analog quantity module 10 is communicatively connected to the controller 9 .
[0030] The analog quantity module 10 converts the current analog quantity data sent by the first current transformer 3 and the second current transformer 4 into digital quantity data and sends the digital quantity data to the controller 9 .
[0031] The controller 9 is connected to the human-machine interaction screen 11 for communication.
[0032] The human-machine interaction screen 11 is used to input initial parameters and display the monitoring status of the busbar through interface programming.
[0033] The output end of the controller 9 is connected to an intermediate relay 13 , and the intermediate relay 13 is used to control an audible and visual alarm 14 .
[0034] When the controller 9 determines that there is a problem with the main bus connection, it controls the sound and light alarm 14 to issue an alarm.
[0035] The controller 9 is connected to a remote host computer 12 for communication.
[0036] The controller 9 can send the monitoring result of the busbar to the remote host computer 12 , and the remote host computer 12 can also send instructions to the controller 9 .
Claims
1. A switch cabinet bus connection monitoring device, the switch cabinet bus comprises a main busbar (1) and a branch busbar (2), the main busbar (1) is provided in a group and arranged opposite to each other, a heat dissipation gap (7) is formed between the main busbars (1), and the branch busbar (2) is fixedly connected to the main busbar (1), wherein: The branch bus (2) is connected to the two main busbars (1), and a first current transformer (3) and a second current transformer (4) are respectively provided on the two main busbars (1) arranged opposite to each other. The connection status of the main busbar (1) is determined by monitoring and comparing the signals of the first current transformer (3) and the second current transformer (4).
2. A switch cabinet busbar connection monitoring device according to claim 1, characterized in that: The current data detected by the first current transformer (3) and the second current transformer (4) are sent to the controller (9), and the controller (9) determines the connection status of the main busbar (1) by comparing the current data detected by the two transformers.
3. A switch cabinet busbar connection monitoring device according to claim 2, characterized in that: The first current transformer (3) and the second current transformer (4) are electrically connected to the analog quantity module (10), and the analog quantity module (10) is communicatively connected to the controller (9).
4. A switch cabinet busbar connection monitoring device according to claim 3, characterized in that: The controller (9) is communicatively connected to the human-machine interaction screen (11).
5. A switch cabinet busbar connection monitoring device according to claim 4, characterized in that: The output end of the controller (9) is connected to an intermediate relay (13), and the intermediate relay (13) is used to control the sound and light alarm (14).
6. A switch cabinet busbar connection monitoring device according to claim 5, characterized in that: The controller (9) is communicatively connected to a remote host computer (12).