Generator short circuit bar detection device

Abstract

The embodiment of the utility model discloses a detection device for a short-circuit bar of a generator. The detection device comprises a data acquisition module and a control module, the data acquisition module comprises a plurality of infrared temperature measurement probes, and different infrared temperature measurement probes are used for detecting the temperatures of different positions of the generator short circuit bar and generating detection signals; and the control module is connected with the data acquisition module and is used for determining the working state of the generator short circuit bar according to the detection signal. According to the technical scheme provided by the embodiment of the utility model, the temperature of the three-phase short-circuit bar of the generator is acquired through the data acquisition module, manual measurement is not needed, no danger is brought to workers, the detection result is accurate, abnormal conditions of the short-circuit bar of the generator can be found in time, and the risk of overheating damage of the short-circuit bar of the generator is reduced.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a generator short-circuit busbar detection device. Background Technology

[0002] The generator short-circuit test is a crucial test before starting the entire generator unit. Its purpose is to verify the correctness of the generator's relevant current loops, check the symmetry of the generator stator three-phase currents, confirm whether the generator temperature meets requirements when the current rises to the rated current, and simultaneously record the generator's short-circuit characteristic curve parameters to provide input for excitation system modeling. The greatest risk in this test lies in the temperature control of the three-phase short-circuit busbar at the generator outlet. Because large generators have high rated currents, the temperature at the short-circuit point will rise rapidly under three-phase winding short-circuit operation conditions. Improper control by the test personnel may lead to the short-circuit busbar and busbar melting.

[0003] Currently, during generator short-circuit tests, temperature monitoring at the short-circuit busbar location is generally done manually. This is problematic because the high temperature at the busbar prevents close-range measurement, leading to significant data errors. Furthermore, the busbar is connected to the busbar, making direct on-site measurement impossible, and the connection point is the hottest point, posing a risk of overheating and meltdown. Additionally, if an anomaly is detected at the busbar during the test, excitation is typically manually cut off, rather than automatically, introducing a time lag and hindering emergency intervention in case of anomalies.

[0004] The existing generator short-circuit busbar detection devices are not intelligent enough and have large detection errors, which has become a technical problem that urgently needs to be solved in the industry. Utility Model Content

[0005] This invention provides a generator short-circuit busbar detection device to solve the problems of existing generator short-circuit busbar detection devices being not intelligent enough and having large detection errors.

[0006] According to one aspect of the present invention, a generator short-circuit bus detection device is provided, comprising: a data acquisition module and a control module;

[0007] The data acquisition module includes multiple infrared temperature probes, and different infrared temperature probes are used to detect the temperature at different locations of the generator short-circuit busbar and generate detection signals;

[0008] The control module is connected to the data acquisition module and is used to determine the working status of the generator short-circuit busbar based on the detection signal.

[0009] Optionally, the detection device further includes:

[0010] The output module has a first end connected to the control module and a second end for electrical connection to the generator excitation system. The output module is used to send a trip command to the generator excitation system in response to the control of the control module.

[0011] Optionally, the detection device further includes:

[0012] The display module, connected to the control module, is used to display the working status of the generator short-circuit busbar.

[0013] Optionally, the detection device further includes:

[0014] The communication module is connected to the data acquisition module, the control module, and the display module respectively, and is used to send the detection signal and operating status of the generator short-circuit busbar to the power plant control system, and to send the detection signal to the display module.

[0015] Optionally, the data acquisition module includes six infrared temperature probes, with each of the A, B, and C phases of the generator short-circuit busbar corresponding to two infrared temperature probes, and the two corresponding infrared temperature probes of the same phase of the generator short-circuit busbar located on opposite sides of the phase.

[0016] Optionally, the detection device further includes:

[0017] A cable, the first end of which is connected to the data acquisition module and the second end of which is connected to the control module.

[0018] Optionally, the control module includes an input signal terminal, and the data acquisition module is connected to the control module through the input signal terminal.

[0019] Optionally, the output module includes an output signal terminal, and the output module is connected to the generator excitation system through the output signal terminal.

[0020] Optionally, the communication module includes a communication port, through which the communication module is connected to the power plant control system.

[0021] Optionally, the detection device further includes a detection device body; the control module, the output module, the display module and the communication module are integrated on the detection device body, and the data acquisition module is located outside the detection device body and is connected to the detection device body via the cable.

[0022] The technical solution provided in this embodiment of the utility model includes a data acquisition module comprising multiple infrared temperature probes. These probes can detect the temperature at different locations on the generator short-circuit busbar and generate detection signals, which are then sent to the control module. The control module determines the operating status of the generator short-circuit busbar based on the detection signals. The temperature of the generator's three-phase short-circuit busbar is obtained through the data acquisition module without manual measurement, thus posing no danger to personnel. Furthermore, the multiple infrared temperature probes can acquire the temperature at different locations on the generator short-circuit busbar, resulting in smaller errors in the acquired temperature data and higher accuracy of the detection results. This allows for timely interruption of excitation when the generator short-circuit busbar malfunctions, reducing the risk of overheating and damage to the short-circuit busbar during generator short-circuit tests, increasing the success rate of the test, and effectively ensuring the good operating condition of the short-circuit busbar. Simultaneously, the detection device is characterized by its small size, simple operation, and few interfaces, making it easy to operate.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of a generator short-circuit busbar detection device provided in an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of a generator short-circuit busbar provided for an embodiment of this utility model;

[0027] Figure 3 A schematic diagram of the structure of another generator short-circuit bus detection device provided in this embodiment of the utility model;

[0028] Figure 4 A schematic diagram of the external shape of another generator short-circuit bus detection device provided in this embodiment of the present utility model. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Figure 1 This is a schematic diagram of the structure of a generator short-circuit bus detection device provided in an embodiment of the present invention. Figure 2 A schematic diagram of a generator short-circuit busbar provided for an embodiment of this utility model. See also... Figure 1 and Figure 2 The detection device 100 includes a data acquisition module 10 and a control module 20. The data acquisition module 10 includes multiple infrared temperature probes, each used to detect the temperature at different locations on the generator short-circuit busbar and generate detection signals. The control module 20, connected to the data acquisition module 10, is used to determine the operating status of the generator short-circuit busbar based on the detection signals.

[0032] Specifically, a generator short-circuit test is required before starting the entire generator set. Because the generator short-circuit busbar is connected to the generator bus, personnel cannot measure it at close range, leading to significant data errors and affecting the test results. This invention's data acquisition module 10 includes multiple infrared temperature probes located at different positions on the generator short-circuit busbar. These probes detect the temperature at different locations on the generator short-circuit busbar and generate detection signals based on the detected temperatures, which are then sent to the control module 20. The control module 20 is connected to the data acquisition module 10 and uses the received detection signals to determine the operating status of the generator short-circuit busbar and whether a generator fault has occurred. Upon receiving the detection signals, the control module 20 determines whether the temperature of the generator short-circuit busbar is abnormal. If the temperature is abnormal, it issues corresponding commands to take appropriate measures. The infrared temperature probes are infrared temperature sensors that use infrared light emitted by the generator short-circuit busbar to measure its temperature. The control module can be a microcontroller, programmable logic controller, field-programmable gate array, embedded system, etc. Infrared temperature probes can be installed on the steel structure above the generator short-circuit busbar. They can detect the temperature at different locations on the generator short-circuit busbar, generating detection signals from these signals. The control module 20 then determines the operating status of the generator short-circuit busbar based on these signals. The generator's operating status can include normal and abnormal states. In the event of an abnormal state, the control module 20 issues corresponding commands to prevent damage.

[0033] The technical solution provided in this embodiment of the utility model includes a data acquisition module comprising multiple infrared temperature probes. These probes can detect the temperature at different locations on the generator short-circuit busbar and generate detection signals, which are then sent to the control module. The control module determines the operating status of the generator short-circuit busbar based on the detection signals. By acquiring the temperature of the generator's three-phase short-circuit busbar through the data acquisition module, manual measurement is unnecessary and poses no danger to personnel. Furthermore, the multiple infrared temperature probes can acquire the temperature at different locations on the generator short-circuit busbar, resulting in smaller errors in the acquired temperature data and higher accuracy of the detection results. When the control module detects an abnormality in the generator short-circuit busbar, it promptly cuts off the excitation, reducing the risk of overheating and damage to the short-circuit busbar during generator short-circuit tests, improving the success rate of the test, and effectively ensuring the good operating condition of the short-circuit busbar.

[0034] Optional, Figure 3 A schematic diagram of the structure of another generator short-circuit bus detection device provided in this embodiment of the utility model. Figure 4 A schematic diagram of the external appearance of another generator short-circuit busbar detection device provided in this embodiment of the utility model. Based on the above embodiment, see... Figure 3 and Figure 4The generator includes a generator excitation system 200 and a power plant control system 300. The generator short-circuit bus detection device 100 also includes an output module 30. The first end of the output module 30 is connected to the control module 20, and the second end of the output module 30 is used to electrically connect to the excitation system 200. The output module 30 is used to send a trip command to the generator excitation system 200 in response to the control of the control module 20.

[0035] Specifically, the detection device 100 also includes an output module 30. The first end of the output module 30 is connected to the control module 20, and the second end is connected to the generator excitation system 200. The control module 20 responds to the control signals and sends a trip command to the generator excitation system. The output module 30 can transmit the trip command from the control module 20 to the output circuit of the generator excitation system when the generator short-circuit busbar is abnormal. After receiving the detection signal, if the control module 20 detects an abnormality in the generator short-circuit busbar based on the detection signal, it sends a trip command to the output module 30. The output module 30 then sends a trip command to the generator excitation system 200. Upon receiving the trip command, the generator excitation system 200 cuts off the generator excitation, thus achieving the excitation cutoff function.

[0036] The output module 30 includes an output signal terminal 31, which is connected to the generator excitation system 200.

[0037] Specifically, the output module 30 includes an output signal terminal 31, which is used to connect the output module 30 and the generator excitation system 200 together. The output module 30 is connected to the generator excitation system 200 through the output signal terminal 31. When a fault occurs in the generator short-circuit busbar, the output module 30 transmits the trip command issued by the control module 20 to the generator excitation system 200 to promptly cut off the generator excitation and quickly reduce the generator current.

[0038] Optionally, based on the above embodiments, see also... Figure 3 and Figure 4 The detection device 100 also includes a display module 40, which is connected to the control module 20 and is used to display the working status of the generator short-circuit busbar.

[0039] Specifically, the detection device 100 also includes a display module 40, which is connected to the control module 20. The display module 40 is mainly used to display whether the generator short-circuit busbar is abnormal. The display module 40 also includes a display screen 41, which can be mounted on one side of the display device body 60. The display screen 41 is used to display the operating status of the generator short-circuit busbar. The detection device 100 also includes a power switch 42, a power status indicator light 43, and a keyboard 44, which can be mounted on the same side of the display screen 41. The power switch 42 is used to control the opening and closing of the detection device 100, the keyboard 44 is used to operate the detection device 100, and the power status indicator light 43 mainly displays the status of the detection device 100. For example, an illuminated power status indicator light 43 indicates that the detection device 100 is in the on state, and an off power status indicator light 43 indicates that the detection device 100 is in the off state.

[0040] Optionally, based on the above embodiments, see also... Figure 3 and Figure 4 The detection device 100 also includes a communication module 50, which is connected to the data acquisition module 10, the control module 20 and the display module 40 respectively. The communication module 50 is used to send the detection signal and operating status of the generator short-circuit busbar to the power plant control system 300, and to send the detection signal to the display module 40.

[0041] Specifically, the detection device 100 also includes a communication module 50, which is connected to the data acquisition module 10, control module 20, display module 40, and power plant control system 300. The detection signals acquired by the data acquisition module 10 are transmitted to the display module 40 and power plant control system 300 via the communication module 50. When an abnormality occurs in the generator short-circuit busbar, the control module 20 transmits the abnormal information to the power plant control system 300 via the communication module 50, allowing relevant personnel to promptly understand the status of the generator short-circuit busbar. The communication module can employ various communication methods, including but not limited to wireless communication, wired communication, cellular networks, LoRa communication, Wi-Fi, and Bluetooth.

[0042] The communication module includes a communication port 51, and the communication module 50 is connected to the power plant control system 300 through the output signal terminal 51.

[0043] Specifically, the communication module 50 includes a communication port 51, which connects the communication module 50 to the power plant control system 300. The communication port 51 transmits the detection data collected by the data acquisition module 10 to the power plant control system 300, enabling relevant personnel to promptly understand the operating status of the generator short-circuit busbar. In the event of a generator short-circuit busbar fault, the communication module 50 transmits the generator status to the power plant control system 300 via the communication terminal 51. The power plant control system 300 then promptly issues an alarm and takes appropriate measures immediately.

[0044] Optionally, the data acquisition module 10 includes six infrared temperature probes. Phases A, B, and C of the generator short-circuit busbar each correspond to two infrared temperature probes, and the two corresponding infrared temperature probes of the same generator short-circuit busbar are located on opposite sides of the phase.

[0045] Specifically, the data acquisition module 10 may include six infrared temperature probes, which correspond to phases A, B, and C of the generator short-circuit busbar, respectively. Two infrared temperature probes within the same phase of the generator short-circuit busbar are located on opposite sides of that phase. Each phase of the generator short-circuit busbar corresponds to two infrared temperature probes, which can be located above and below the corresponding phase to collect the temperature at different locations on the generator short-circuit busbar. With two infrared temperature probes per phase of the generator short-circuit busbar, measurements can be taken at different locations within each phase, improving the accuracy of the monitoring results.

[0046] Optionally, the detection device 100 also includes a cable, with one end connected to the data acquisition module 10 and the second end connected to the control module 20.

[0047] Specifically, the detection device 100 also includes a cable, one end of which is connected to the data acquisition module 10, and the other end to the control module 20. Since the infrared temperature probe is installed on the steel structure of the factory roof near the generator short-circuit busbar, and other modules are located far from the generator short-circuit busbar due to the higher temperature nearby, the data acquisition module 10 is relatively far from the other modules. Therefore, a cable is needed to transmit the acquired detection signal to the control module 20. The cable connects the data acquisition module 10 and the control module 20, transmitting the detection signal acquired by the infrared temperature probe to the control module. The detection signal acquired by the data acquisition module 10 can also be transmitted to the control module wirelessly, such as via Wi-Fi, Bluetooth, or cellular networks.

[0048] Optionally, the control module 20 includes an input signal terminal 21, and the data acquisition module 10 is connected to the control module 20 through the input signal terminal 21.

[0049] Specifically, the control module 20 includes an input signal terminal 21, and a cable connects the data acquisition module 10 and the control module 20 together through the input signal terminal 21. The detection signal acquired by the data acquisition module 10 is sent to the control module 20 through the cable and the input signal terminal 21, so that the control module 20 can detect the generator short-circuit busbar according to the detection signal and determine whether there is an abnormality in the generator short-circuit busbar.

[0050] Optionally, based on the above embodiments, see also... Figure 3 and Figure 4 The detection device 100 also includes a detection device body 60, a control module 20, an output module 30, a display module 40 and a communication module 50 integrated on the detection device body 60, and a data acquisition module 10 located outside the detection device body 60 and connected to the detection device body 60 via a cable.

[0051] Specifically, the detection device 100 also includes a detection device body 60, with the control module 20, output module 30, display module 40, and communication module 50 integrated on the detection device body 60, while the data acquisition module 10 is located outside the detection device body 60. The detection device body 60 must maintain a certain distance from the generator short-circuit busbar to avoid the temperature of the generator short-circuit busbar affecting the detection results. The data acquisition module 10 and the detection device body 60 are connected together by a cable to transmit the detection signal to the detection device body 60.

[0052] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A detection device for a generator short-circuit busbar, characterized in that, include: Data acquisition module and control module; The data acquisition module includes multiple infrared temperature probes, and different infrared temperature probes are used to detect the temperature at different locations of the generator short-circuit busbar and generate detection signals; The control module is connected to the data acquisition module and is used to determine the working status of the generator short-circuit busbar based on the detection signal.

2. The detection device according to claim 1, characterized in that, Also includes: The output module has a first end connected to the control module and a second end for electrical connection to the generator excitation system. The output module is used to send a trip command to the generator excitation system in response to the control of the control module.

3. The detection device according to claim 2, characterized in that, Also includes: The display module, connected to the control module, is used to display the working status of the generator short-circuit busbar.

4. The detection device according to claim 3, characterized in that, Also includes: The communication module is connected to the data acquisition module, the control module, and the display module respectively, and is used to send the detection signal and operating status of the generator short-circuit busbar to the power plant control system, and to send the detection signal to the display module.

5. The detection device according to claim 1, characterized in that, The data acquisition module includes six infrared temperature probes. Phases A, B, and C of the generator short-circuit busbar each correspond to two infrared temperature probes. The two corresponding infrared temperature probes of the same generator short-circuit busbar are located on opposite sides of the phase.

6. The detection device according to claim 4, characterized in that, Also includes: A cable, the first end of which is connected to the data acquisition module and the second end of which is connected to the control module.

7. The detection device according to claim 6, characterized in that, The control module includes an input signal terminal, and the data acquisition module is connected to the control module through the input signal terminal.

8. The detection device according to claim 2, characterized in that, The output module includes an output signal terminal, and the output module is connected to the generator excitation system through the output signal terminal.

9. The detection device according to claim 4, characterized in that, The communication module includes a communication port, and the communication module is connected to the power plant control system through the communication port.

10. The detection device according to claim 6, characterized in that, The detection device also includes a detection device body; the control module, the output module, the display module and the communication module are integrated on the detection device body, and the data acquisition module is located outside the detection device body and is connected to the detection device body through the cable.

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