Insulation detection system
By introducing insulation monitoring and fault location devices into the port machinery system, combined with current transformers and resistance sensors, the problem of inaccurate location of faulty equipment in existing technologies has been solved, and efficient insulation fault detection and alarm functions have been achieved.
Patent Information
- Application Number
- CN202423060487.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing insulation testing systems cannot accurately locate the faulty equipment in port machinery, thus failing to meet actual testing requirements.
The system employs insulation monitoring devices, insulation fault location devices, current transformers, test current generators, and resistance sensors. By measuring and detecting current and resistance values, and combining this with the main electrical control system, it achieves precise location and alarm for faulty equipment.
It enables precise location and alarm of faulty equipment in the port machinery system, improves the detection efficiency and accuracy of insulation faults, and facilitates fault handling.
Smart Images
Figure CN223624361U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power testing technology, specifically to an insulation testing system. Background Technology
[0002] Port machinery equipment refers to the mechanical equipment used in docks or ports, such as yard cranes, quay cranes, bulk cargo cranes, and container trucks. It is a core component to ensure the efficient and safe operation of docks.
[0003] In recent years, with the continuous development of fully automated terminals, more and more traditional terminals are also undergoing automation transformation and upgrading, moving towards intelligent, smart, and unmanned smart ports, which greatly enhances the port's ability to optimize the allocation of information and resources.
[0004] However, port machinery operates in harsh environments with high salt spray and humidity, and is primarily high-powered. Long-term operation can accelerate the aging of equipment and cables, leading to safety issues such as electrical leakage, shutdowns, and fires. Insulation detection systems are crucial for the entire terminal, ensuring equipment safety in harsh environments and improving overall equipment efficiency.
[0005] Existing insulation testing systems often only monitor individual motors and drive circuits on-site, such as auxiliary circuits, lighting circuits, and control circuits, to report the fault status of the power system in real time. However, this method can only monitor a single circuit and cannot accurately locate the faulty device within the same drive circuit, thus failing to meet actual testing needs. Utility Model Content
[0006] In view of this, the present invention provides an insulation detection system that can realize the insulation fault location and alarm function in the port machinery system, thereby improving the detection efficiency of insulation faults.
[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0008] An insulation detection system according to a first aspect of the present invention includes an insulation monitoring device, an insulation fault location device, and at least one current transformer; the insulation monitoring device is communicatively connected to the insulation fault location device, the insulation fault location device is electrically connected to each of the current transformers, and the at least one current transformer is disposed in the circuit of each port machinery device in the port machinery system.
[0009] The insulation monitoring device is configured to send a trigger signal to the insulation fault location device when an insulation fault is determined to occur in the port machinery system. The trigger signal includes fault circuit information, which indicates the fault circuit in which the insulation fault occurred.
[0010] The insulation fault location device is configured to, in response to the trigger signal, use the at least one current transformer to measure the detection current value corresponding to each port machinery device in the fault circuit; determine the faulty device in the fault circuit where the insulation fault has occurred based on the detection current value, and feed it back to the insulation monitoring device.
[0011] Furthermore, the system also includes a test current generator, which is communicatively connected to the insulation fault location device and electrically connected to the drive circuit in the port machinery system.
[0012] The insulation fault location device is also configured to send a control signal to the test current generator in response to the trigger signal, the control signal including the fault circuit information;
[0013] The test current generator is configured to send a test current to the fault circuit in response to the control signal.
[0014] Furthermore, the current transformers are configured in a one-to-one correspondence with the port machinery equipment in the port machinery system;
[0015] The current transformer is configured to measure the detection current value corresponding to the corresponding port machinery equipment and send the detection current value to the insulation fault location device.
[0016] Specifically, the insulation fault location device is configured to determine whether the detection current value corresponding to each port machinery device in the fault circuit is greater than a preset current threshold; when the detection current value is greater than the preset current threshold, the corresponding port machinery device is determined to be the faulty device that has experienced an insulation fault.
[0017] Furthermore, the insulation monitoring device is also configured to send the equipment information of the faulty equipment to the main electrical control system.
[0018] Furthermore, the insulation monitoring device is also configured to output alarm information and display equipment information of the faulty equipment.
[0019] Furthermore, the system also includes an insulation fault detection device and at least one resistance sensor. The insulation fault detection device is communicatively connected to the insulation monitoring device, and the insulation fault detection device is electrically connected to each of the resistance sensors. The at least one resistance sensor is installed in each drive circuit of the port machinery system.
[0020] The insulation fault detection device is configured to use the at least one resistance sensor to measure the detection resistance value corresponding to each drive circuit in the port machinery system; determine the fault circuit in the port machinery system where an insulation fault has occurred based on the detection resistance value, and feed it back to the insulation monitoring device.
[0021] Furthermore, the resistance sensors are configured in a one-to-one correspondence with the drive circuits in the port machinery system;
[0022] The resistance sensor is configured to measure the detection resistance value corresponding to the drive circuit and send the detection resistance value to the insulation fault detection device.
[0023] Specifically, the insulation fault detection device is configured to determine whether the detection resistance value corresponding to each drive circuit in the port machinery system is less than a preset resistance threshold; when the detection resistance value is less than the preset resistance threshold, the corresponding drive circuit is determined to be a fault circuit in which an insulation fault has occurred.
[0024] Furthermore, the insulation monitoring device is also configured to send information about the faulty circuit to the main electrical control system.
[0025] The above-mentioned technical solution of this utility model has at least one of the following beneficial effects:
[0026] The insulation detection system according to this utility model embodiment, by setting up an insulation fault location device and activating it by an insulation monitoring device, uses a current transformer to measure the detection current value of the port machinery equipment, thereby locating the port machinery equipment with an insulation fault. When the system detects leakage current or low insulation faults in the port machinery system during operation, it can accurately locate the position of a faulty device in the same drive circuit, realizing the insulation fault location and alarm function in the port machinery system, improving the detection efficiency of insulation faults, and facilitating fault handling operations. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of an insulation detection system according to an embodiment of the present invention;
[0028] Figure 2 This is a schematic diagram of the insulation detection system according to another embodiment of the present invention;
[0029] Figure 3 This is a schematic diagram of the insulation fault location process according to a specific embodiment of the present invention;
[0030] Figure 4 This is a schematic diagram of the insulation detection system according to another embodiment of the present invention.
[0031] Reference numerals: 110-Insulation monitoring device; 120-Insulation fault location device; 130-Current transformer; 140-Test current generator; 150-Insulation fault detection device; 160-Resistance sensor. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.
[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.
[0034] The insulation detection system according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.
[0035] Reference manual attached Figure 1 This diagram illustrates the structure of an insulation detection system according to an embodiment of the present invention. Figure 1 As shown, the insulation detection system may include an insulation monitoring device 110, an insulation fault location device 120, and at least one current transformer 130. The insulation monitoring device 110 can be communicatively connected to the insulation fault location device 120, and the insulation fault location device 120 can be electrically connected to each of the current transformers 130. At least one current transformer 130 can be installed in the circuit of each port machinery device within the port machinery system.
[0036] Specifically, the insulation monitoring device 110 can be configured to send a trigger signal to the insulation fault location device 120 when an insulation fault is determined to occur in the port machinery system. The trigger signal may include fault circuit information, which is used to indicate the fault circuit in which the insulation fault occurred.
[0037] Accordingly, the insulation fault location device 120 can receive a trigger signal. The insulation fault location device 120 can be configured to, in response to the trigger signal, use at least one current transformer 130 to measure the detection current value corresponding to each port machinery device in the fault circuit; determine the faulty device in the fault circuit where the insulation fault has occurred based on the detection current value, and feed it back to the insulation monitoring device 110.
[0038] In this embodiment of the utility model, the port machinery system can be of various types, such as including but not limited to IT systems (where the letter I in IT system indicates that the power distribution network is not grounded or grounded through high impedance, and the letter T indicates that the electrical equipment casing is grounded). This embodiment of the utility model does not specifically limit this type of system.
[0039] In this embodiment of the invention, the port machinery system may include multiple drive circuits, each of which may contain one or more port machinery devices. When the insulation monitoring device 110 determines that an insulation fault has occurred in the port machinery system, it can identify the faulty circuit in which the insulation fault occurred. If the faulty circuit in which the insulation fault occurred contains only one port machinery device, the faulty device in which the insulation fault occurred can be directly identified. If the faulty circuit in which the insulation fault occurred contains multiple port machinery devices, the faulty device in which the insulation fault occurred cannot be directly identified. In this case, the insulation monitoring device 110 can trigger the insulation fault location device 120 to locate the faulty device in which the insulation fault occurred.
[0040] It should be noted that whether an insulation fault has occurred in the port machinery system and the faulty circuit in which the insulation fault has occurred can be detected using an insulation fault detection device and at least one resistance sensor (the specific determination process will be described in detail later). However, it is not limited to this. In some embodiments, other methods can also be used to detect whether an insulation fault has occurred in the port machinery system and the faulty circuit in which the insulation fault has occurred. This utility model embodiment does not specifically limit this.
[0041] In some embodiments, refer to the appendix to the specification. Figure 2 The insulation detection system may also include a test current generator 140, which can be communicatively connected to the insulation fault location device 120 and electrically connected to the drive circuit in the port machinery system.
[0042] Specifically, the insulation fault location device 120 can also be configured to send a control signal to the test current generator 140 in response to a trigger signal. This control signal may include fault circuit information. Accordingly, the test current generator 140 can be configured to send a test current to the fault circuit in response to the control signal.
[0043] In this embodiment of the invention, the insulation fault location device 120 can be connected to the test current generator 140. After receiving the trigger signal, the insulation fault location device 120 can trigger the test current generator 140 to perform calibration and send positive and negative test currents to the fault circuit corresponding to the fault circuit information.
[0044] It should be noted that the above-described implementation method of sending positive and negative test currents to the fault circuit through the test current generator 140 is only an example. In practical applications, positive and negative test currents can also be sent to the fault circuit in other ways, such as sending positive and negative test currents to the fault circuit through the power supply of the fault circuit. This utility model embodiment does not specifically limit this.
[0045] In some embodiments, the current transformer 130 can be configured to correspond one-to-one with the port machinery equipment in the port machinery system, for example, it can be installed on the motor cable corresponding to the port machinery equipment. The current transformer 130 can be configured to measure the detection current value corresponding to the port machinery equipment and send the detection current value to the insulation fault location device 120.
[0046] Accordingly, the insulation fault location device 120 can be specifically configured to determine whether the detected current value corresponding to each port machinery device in the fault circuit is greater than a preset current threshold (for example, this determination can be achieved using a simple current comparator or similar device); when the detected current value is greater than the preset current threshold, the corresponding port machinery device is determined to be the faulty device that has experienced an insulation fault. The preset current threshold can be pre-set according to actual conditions, and different preset current thresholds can be set for different port machinery devices; this embodiment of the invention does not specifically limit this.
[0047] In this embodiment of the invention, the current transformer 130 and the port machinery equipment can be in one-to-one correspondence, with one current transformer 130 used to detect the detection current value corresponding to one port machinery equipment. Specifically, when the test current generator 140 sends positive and negative test currents to the drive circuit (i.e., the fault circuit) of the port machinery equipment corresponding to the current transformer 130, the test current will be detected by the current transformer 130 and sent to the insulation fault location device 120.
[0048] In this embodiment of the invention, after receiving the detected current value sent by the current transformer 130, the insulation fault location device 120 can evaluate the detected current value. When the detected current value is greater than a preset current threshold, the corresponding port machinery equipment can be identified as the faulty equipment with an insulation fault, and feedback can be sent to the insulation monitoring device 110.
[0049] In one specific embodiment, referring to the appendix to the specification... Figure 3Assuming that the insulation fault location device 120 receives a trigger signal, it can determine the faulty circuit where the insulation fault occurred, such as... Figure 3 As shown, the fault circuit may include, but is not limited to, port machinery equipment such as cranes, at least one trolley, and at least one trolley. Each port machinery piece's circuit is equipped with a corresponding current transformer 130. The insulation fault location device 120 can trigger the test current generator 140 to send positive and negative test currents to the fault circuit. Each current transformer 130 in the circuit containing the port machinery equipment can detect the detection current value corresponding to its respective port machinery equipment and send the detection current value to the insulation fault location device 120, which can evaluate the detection current value. For example, if the insulation fault location device 120 determines that the detection current value corresponding to the trolley 1 is greater than a preset current threshold, then the trolley 1 can be identified as the faulty equipment experiencing an insulation fault, and this information is fed back to the insulation monitoring device 110.
[0050] It is understood that this utility model embodiment injects test current into the fault circuit of the port machinery system by using a test current generator. The test current is measured by a current transformer and then evaluated by an insulation fault location device, thereby realizing the insulation fault location and alarm function. The implementation method is simple and has a high degree of automation.
[0051] In some embodiments, the insulation monitoring device 110 may also be configured to send equipment information of faulty equipment to the main electrical control system.
[0052] In some embodiments, the insulation monitoring device 110 may also be configured to output alarm information and display equipment information of faulty equipment.
[0053] In this embodiment of the invention, after the insulation monitoring device 110 identifies the faulty equipment, it can output alarm information to trigger a system alarm and display the equipment information of the faulty equipment with the insulation fault on the fault display interface, thereby realizing the insulation fault location and alarm function in the port machinery system. The insulation monitoring device 110 can also send a fault signal to the main electrical control system so that the main electrical control system can take corresponding countermeasures, such as cutting off the power to the faulty equipment.
[0054] It is understood that by integrating and secondary developing the main power control system, this utility model embodiment can make the system more economical and efficient, and improve user acceptance.
[0055] In summary, the insulation detection system according to this utility model embodiment, by setting up an insulation fault location device and activating it by an insulation monitoring device, uses a current transformer to measure the detection current value of the port machinery equipment, thereby locating the port machinery equipment experiencing an insulation fault. When the system detects leakage current or low insulation in the port machinery system during operation, it can accurately locate the position of a faulty device within the same drive circuit, realizing insulation fault location and alarm functions within the port machinery system, improving the efficiency of insulation fault detection, and facilitating fault handling operations.
[0056] The process of determining an insulation fault in a port machinery system and the corresponding devices are described in detail below.
[0057] In some embodiments, refer to the appendix to the specification. Figure 4 The insulation detection system may also include an insulation fault detection device 150 and at least one resistance sensor 160. The insulation fault detection device 150 may be communicatively connected to the insulation monitoring device 110. The insulation fault detection device 150 may be electrically connected to each resistance sensor 160. At least one resistance sensor 160 may be installed in each drive circuit of the port machinery system.
[0058] Specifically, the insulation fault detection device 150 can be configured to use at least one resistance sensor 160 to measure the detection resistance value corresponding to each drive circuit in the port machinery system; determine the fault circuit in the port machinery system where the insulation fault has occurred based on the detection resistance value, and feed it back to the insulation monitoring device 110.
[0059] In some embodiments, the resistance sensor 160 can be configured to correspond one-to-one with the drive circuits in the port machinery system, for example, it can be connected in series in the corresponding drive circuit. The resistance sensor 160 can be configured to measure the detection resistance value corresponding to the drive circuit and send the detection resistance value to the insulation fault detection device 150.
[0060] Accordingly, the insulation fault detection device 150 can be specifically configured to determine whether the detection resistance value corresponding to each drive circuit in the port machinery system is less than a preset resistance threshold (for example, this determination can be achieved using a simple resistance comparator or similar device); when the detection resistance value is less than the preset resistance threshold, the corresponding drive circuit is determined to be a faulty circuit where an insulation fault has occurred. The preset resistance threshold can be pre-set according to actual conditions, for example, it can be set to 1KΩ-2MΩ. Different preset resistance thresholds can be set for different port machinery equipment, and this embodiment of the invention does not specifically limit this.
[0061] In this embodiment of the invention, the resistance sensor 160 and the drive circuit can be in one-to-one correspondence, and one resistance sensor 160 can be used to detect the detection resistance value corresponding to one drive circuit. Specifically, the resistance sensor 160 can monitor the detection resistance value on the corresponding drive circuit in real time and send it to the insulation fault detection device 150. The detection resistance value on the drive circuit can be used to indicate the leakage current of each port machinery device on the drive circuit.
[0062] In this embodiment of the invention, after receiving the detected resistance value sent by the resistance sensor 160, the insulation fault detection device 150 can evaluate the detected resistance value. When the detected resistance value is less than a preset resistance threshold, it can be determined that there is a faulty device with an insulation fault in the corresponding drive circuit, that is, the drive circuit is a faulty circuit with an insulation fault, and this is fed back to the insulation monitoring device 110.
[0063] It is understood that by setting up an insulation fault detection device, the present invention utilizes a resistance sensor to detect the detection resistance value of each drive circuit in the port machinery system in real time, which can effectively detect whether there are leakage current or low equipment insulation faults in the port machinery system during operation, thereby improving the detection efficiency and accuracy of insulation faults.
[0064] In some embodiments, the insulation monitoring device 110 may also be configured to send information about a faulty circuit to the main electrical control system.
[0065] In this embodiment of the invention, after identifying a faulty circuit, the insulation monitoring device 110 can output alarm information to trigger a system alarm. When the faulty circuit includes multiple port machinery devices, the insulation monitoring device 110 can display information about the faulty circuit with the insulation fault on the fault display interface, realizing the insulation fault detection and alarm function in the port machinery system. When the faulty circuit includes only one port machinery device, the insulation monitoring device 110 can also display the equipment information in the faulty circuit on the fault display interface, realizing the insulation fault location and alarm function in the port machinery system. The insulation monitoring device 110 can also send a fault signal to the main electrical control system, enabling the main electrical control system to take corresponding countermeasures.
[0066] In practical applications, according to design requirements, the overall solution of the insulation detection system can be designed, constructed, and debugged simultaneously with the main electrical control system. A well-integrated solution can be developed, installed, and tested, and its detection effect can be verified to achieve the expected goals.
[0067] It is understood that by setting up a two-level protection system for early warning and alarm, this utility model embodiment can not only detect insulation detection faults in the system, but also accurately locate the faulty equipment, thereby realizing the insulation fault location and alarm function in the port machinery system and improving the detection efficiency and accuracy of insulation faults.
[0068] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. An insulation detection system, characterized in that, It includes an insulation monitoring device, an insulation fault location device, and at least one current transformer; the insulation monitoring device is communicatively connected to the insulation fault location device, the insulation fault location device is electrically connected to each of the current transformers, and the at least one current transformer is installed in the circuit of each port machinery device in the port machinery system. The insulation monitoring device is configured to send a trigger signal to the insulation fault location device when an insulation fault is determined to occur in the port machinery system. The trigger signal includes fault circuit information, which indicates the fault circuit in which the insulation fault occurred. The insulation fault location device is configured to, in response to the trigger signal, use the at least one current transformer to measure the detection current value corresponding to each port machinery device in the fault circuit; determine the faulty device in the fault circuit where the insulation fault has occurred based on the detection current value, and feed it back to the insulation monitoring device.
2. The insulation testing system according to claim 1, characterized in that, The system also includes a test current generator, which is communicatively connected to the insulation fault location device and electrically connected to the drive circuit of the port machinery system. The insulation fault location device is also configured to send a control signal to the test current generator in response to the trigger signal, the control signal including the fault circuit information; The test current generator is configured to send a test current to the fault circuit in response to the control signal.
3. The insulation testing system according to claim 2, characterized in that, The current transformers are installed one-to-one with the port machinery equipment in the port machinery system; The current transformer is configured to measure the detection current value corresponding to the corresponding port machinery equipment and send the detection current value to the insulation fault location device.
4. The insulation detection system according to claim 1, characterized in that, The insulation fault location device is specifically configured to determine whether the detection current value corresponding to each port machinery device in the fault circuit is greater than a preset current threshold; when the detection current value is greater than the preset current threshold, the corresponding port machinery device is determined to be the faulty device that has experienced an insulation fault.
5. The insulation detection system according to claim 1, characterized in that, The insulation monitoring device is also configured to send the equipment information of the faulty equipment to the main power control system.
6. The insulation detection system according to claim 1, characterized in that, The insulation monitoring device is also configured to output alarm information and display equipment information of the faulty equipment.
7. The insulation detection system according to claim 1, characterized in that, The system also includes an insulation fault detection device and at least one resistance sensor. The insulation fault detection device is communicatively connected to the insulation monitoring device and electrically connected to each of the resistance sensors. The at least one resistance sensor is installed in each drive circuit of the port machinery system. The insulation fault detection device is configured to use the at least one resistance sensor to measure the detection resistance value corresponding to each drive circuit in the port machinery system; determine the fault circuit in the port machinery system where an insulation fault has occurred based on the detection resistance value, and feed it back to the insulation monitoring device.
8. The insulation detection system according to claim 7, characterized in that, The resistance sensors are configured one-to-one with the drive circuits in the port machinery system; The resistance sensor is configured to measure the detection resistance value corresponding to the drive circuit and send the detection resistance value to the insulation fault detection device.
9. The insulation detection system according to claim 7, characterized in that, The insulation fault detection device is specifically configured to determine whether the detection resistance value corresponding to each drive circuit in the port machinery system is less than a preset resistance threshold; when the detection resistance value is less than the preset resistance threshold, the corresponding drive circuit is determined to be a fault circuit in which an insulation fault has occurred.
10. The insulation detection system according to claim 7, characterized in that, The insulation monitoring device is also configured to send information about the faulty circuit to the main electrical control system.