Timed switching method and system for heat tracing band load group

Abstract

The invention discloses a heat tracing band load group timing switching method and system, and relates to the technical field of temperature control of high-voltage equipment of a power system, and the method comprises the steps: collecting the current temperature of target equipment in real time; performing temperature judgment based on the current temperature and the starting temperature, controlling the state of the corresponding heat tracing band load group based on a judgment result, and obtaining the starting duration; duration judgment is carried out based on the starting duration and the switching period, other heat tracing band load groups are switched based on the judgment result, or the load current value of the heat tracing band load group which runs at present is monitored; and performing abnormity judgment based on the load current value, and switching a fault heat tracing band load group based on a judgment result or executing related operation on the current heat tracing band load group based on the current temperature and the stop temperature. And the problem of loss easily caused by synchronous start and stop of the heating device is avoided, so that the stability and the reliability of primary equipment under high-temperature operation are improved.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology for high-voltage equipment in power systems, and more specifically to a method and system for timed switching of a heat tracing load group. Background Technology

[0002] The insulation performance of high-voltage GIS circuit breakers depends on the stability of SF6 gas. However, in extremely cold environments (such as below -20℃), SF6 gas is prone to liquefaction, leading to a decrease in insulation capacity. Therefore, a heating system using heat tracing cables is necessary to maintain the equipment temperature. Traditional heat tracing cable control methods, both domestically and internationally, generally employ a "unified start / stop" control logic: when the ambient temperature falls below a set threshold, all heat tracing cable heating devices start simultaneously; they stop simultaneously once the temperature rises.

[0003] However, existing heat tracing control methods have obvious drawbacks: heating devices operate synchronously for a long time, resulting in continuous load on a single device, accelerating wear and tear and shortening its service life; there is a lack of load rotation mechanism, making it impossible to reduce the wear and tear of a single device by distributing working time; there is no backup switching function, and if some heating devices fail, manual intervention is required for replacement, which can easily lead to temperature runaway in GIS equipment and pose safety hazards; the control method is simplistic, relying solely on temperature threshold triggering, and cannot achieve differentiated and timed switching according to the heating needs of different areas of the equipment.

[0004] Therefore, how to avoid the synchronous start-up and shutdown of heating devices, thereby improving the stability and reliability of primary equipment under high-temperature operation, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a method and system for timed switching of a heating cable load group to overcome or at least partially solve the above problems. Through load distribution logic, the problem of losses caused by synchronous start-up and shutdown of heating devices is avoided, thereby improving the stability and reliability of primary equipment under high temperature operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, embodiments of the present invention provide a method for timed switching of a heat tracing load group, comprising: Real-time acquisition of the target device's current temperature; Temperature is determined based on the current temperature and the start-up temperature. The state of the corresponding heat tracing load group is controlled based on the determination result, and the start-up duration is obtained. The duration is determined based on the startup time and switching cycle. Other heat tracing load groups are switched based on the determination result, or the load current value of the currently running heat tracing load group is monitored. Anomaly is determined based on the load current value, and the faulty heat tracing load group is switched based on the determination result, or relevant operations are performed on the current heat tracing load group based on the current temperature and the stop temperature.

[0007] In one embodiment, the status of the corresponding heat tracing load group is controlled according to priority order based on the judgment result, specifically including: Determine whether the current temperature is less than or equal to the start-up temperature; If so, the highest priority heat tracing load group will be started in order of priority, and will be used as the currently running heat tracing load group, and the corresponding start-up time will be obtained. Otherwise, keep all heat tracing load groups in standby mode.

[0008] In one embodiment, determining the duration based on the startup duration and switching cycle specifically includes: Determine whether the startup duration is greater than or equal to the switching cycle; If so, disconnect the current heat tracing load group, switch to another heat tracing load group, obtain the corresponding startup duration, and return to the duration judgment step; Otherwise, monitor and collect the load current value of the currently operating heat tracing load group.

[0009] In one embodiment, when the startup duration is greater than or equal to the switching cycle, the system switches to the next highest priority heat tracing load group according to the priority order and obtains the corresponding startup duration. The duration determination step is returned based on the startup duration; By repeating the above duration determination steps, the rotation mechanism of the heat tracing load group is executed, and different heat tracing load groups are switched to run in sequence according to the priority order.

[0010] In one embodiment, the priority order is set manually based on historical experience or automatically based on the current performance of each heat tracing load group participating in the rotation mechanism. The higher the current performance, the higher the corresponding priority; The rotation mechanism is as follows: according to the priority order, the corresponding heat tracing load groups are switched to operate in descending order of priority.

[0011] In one embodiment, anomaly detection based on the load current value specifically includes: Determine whether the load current value is greater than the abnormal threshold; If so, the currently running heat tracing load group is determined to be the faulty heat tracing load group, and the faulty heat tracing load group is disconnected and switched to the next priority heat tracing load group for operation. Otherwise, determine whether the current temperature after running the heat tracing load group is greater than or equal to the stop temperature; If so, disconnect the currently running heat tracing load group, put all heat tracing load groups into standby mode, and return to the temperature judgment steps above. Otherwise, return to the above anomaly detection steps and continue monitoring the real-time load current value.

[0012] In one embodiment, fault marking is performed based on the faulty heat tracing load group, and fault information is generated by combining its unique number; Based on the fault information, a fault warning notification is sent to the corresponding terminal. The faulty heat tracing load group that has been marked as faulty cannot participate in the rotation mechanism until it returns to normal.

[0013] In one embodiment, it further includes: manually switching modes; In case of an emergency, manual switching mode will be activated after identity verification. In the manual switching mode, the corresponding target heat tracing load group can be forcibly switched to operation, and if there is no operation within a preset time, the manual switching mode will be automatically exited and the original working mode will be restored.

[0014] In one embodiment, the method further includes: remotely displaying in real time the operating status of each heat tracing load group participating in the rotation mechanism, the current temperature of the target device, the set start temperature, the stop temperature, the switching cycle, the abnormal threshold, and the priority order, and being able to remotely modify the start temperature, the stop temperature, the switching cycle, the abnormal threshold, and the priority order.

[0015] In a second aspect, embodiments of the present invention provide a timing switching system for a heat tracing load group, comprising: a temperature acquisition module, a temperature judgment switching module, a period judgment switching module, and an anomaly judgment switching module; The temperature acquisition module is used to acquire the current temperature of the target device in real time; The temperature judgment and switching module is used to judge the temperature based on the current temperature and the start-up temperature, control the state of the corresponding heat tracing load group based on the judgment result, and obtain the start-up duration. The cycle judgment and switching module is used to judge the duration based on the start-up duration and the switching cycle, switch other heat tracing load groups based on the judgment result, or monitor the load current value of the currently running heat tracing load group. The anomaly detection and switching module is used to detect anomalies based on the load current value, and switch the faulty heat tracing load group based on the detection result or perform relevant operations on the current heat tracing load group based on the current temperature and the stop temperature.

[0016] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a method and system for timed switching of a heat tracing load group, which has the following beneficial effects: 1. This invention adopts a dual-dimensional control strategy of temperature and time: when the temperature information collected by the temperature acquisition module is lower than the set start threshold of the heat tracing cable, the heat tracing cable heating logic is activated; based on the preset timed switching cycle, the heating devices of each group of heat tracing cables are automatically controlled to work in rotation. Through the load rotation mechanism, the working time of a single group of equipment is reduced, the working loss is greatly reduced, and the service life of the equipment is effectively extended.

[0017] 2. For faulty heating devices, it can quickly and accurately identify the fault and automatically switch to normal heating devices, while simultaneously issuing an alarm signal, effectively improving the operational stability and reliability of the heating tape system.

[0018] 3. Different temperature thresholds and switching cycles can be set for different locations of the heating tape equipment to meet precise heating needs.

[0019] 4. The present invention adopts a load timed switching design: the load switching module supports independent on / off control of N groups of heat tracing loads to realize the load rotation mechanism. When a fault is detected in a certain load channel, the faulty group is immediately disconnected, and the remaining loads continue to use the rotation mechanism to ensure the normal operation of the primary equipment.

[0020] 5. This invention provides two control modes: manual setting and automatic switching, which takes into account both flexible operation and intelligent maintenance needs. It can effectively solve the problems faced by traditional temperature controllers in heat tracing systems and has broad market prospects. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a flowchart of a timed switching method for a heat tracing load group provided in an embodiment of the present invention.

[0023] Figure 2 This is a flowchart of a method for anomaly detection based on load current value provided in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of a timing switching system for a heat tracing load group provided in an embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0026] Example 1 To address the problems of traditional temperature controllers, this invention aims to achieve a timed rotation function for the heating cable load, add load distribution logic to avoid losses caused by synchronous start-stop of heating devices, and add an automatic switching mechanism between manual and standby loads to improve the stability and reliability of the primary equipment under high-temperature operation. Based on this, as... Figure 1 As shown, this embodiment of the invention discloses a method for timed switching of a heat tracing load group, characterized by including the following steps. For ease of description, these steps are numbered S1 to S4, and these numbers are not used to limit the sequential relationship between the various steps of this invention: S1 collects the current temperature of the target device in real time.

[0027] Furthermore, in this embodiment, the current temperature of the GIS tank is collected in real time using distributed sensors.

[0028] S2 determines the temperature based on the current temperature and the startup temperature, controls the status of the corresponding heat tracing load group based on the determination result, and obtains the startup duration.

[0029] Furthermore, based on the judgment results, the status of the corresponding heat tracing load groups is controlled in priority order, specifically including: Determine if the current temperature is less than or equal to the startup temperature; If so, the highest priority heat tracing load group will be started in order of priority, and will be used as the currently running heat tracing load group, and the corresponding start-up time will be obtained. Otherwise, keep all heat tracing load groups in standby mode.

[0030] Furthermore, while starting the highest priority heat tracing load group, a timer is started to obtain the corresponding startup duration.

[0031] Furthermore, when the sensor detects that the current temperature of the target device is lower than the preset start-up temperature value, the heating logic is activated, and the heating load group is started according to the preset priority order.

[0032] S3 determines the duration based on the startup time and switching cycle, and switches to other heat tracing load groups based on the determination result, or monitors the load current value of the currently running heat tracing load group.

[0033] Furthermore, the duration is determined based on the startup duration and switching cycle, specifically including: Determine if the startup duration is greater than or equal to the switching cycle; If so, disconnect the current heat tracing load group, switch to another heat tracing load group, obtain the corresponding startup duration, and return to the duration judgment step; Otherwise, monitor and collect the load current value of the currently operating heat tracing load group.

[0034] Furthermore, when the startup duration is greater than or equal to the switching cycle, the system switches to the next highest priority heat tracing load group according to priority order and obtains the corresponding startup duration. Steps for determining duration based on startup duration; By repeating the above duration determination steps, the rotation mechanism of the heat tracing load group is executed, and different heat tracing load groups are switched to run in order of priority.

[0035] Furthermore, the method of the present invention supports independent on / off control of N groups of heat tracing loads, thereby realizing a heat tracing load group rotation mechanism.

[0036] Furthermore, the priority order is set manually based on historical experience or automatically based on the current performance of each heat tracing load group participating in the rotation mechanism; The higher the current performance, the higher the corresponding priority.

[0037] Furthermore, the rotation mechanism is as follows: according to the priority order, the corresponding heat tracing load groups are switched in order from high to low. That is, when the first priority heat tracing load group reaches the switching cycle, the second priority heat tracing load group is automatically switched. When the second priority heat tracing load group reaches the switching cycle, the third priority heat tracing load group is automatically switched, and so on. When the last priority heat tracing load group reaches the switching cycle, it is automatically switched back to the first priority heat tracing load group.

[0038] S4 determines anomalies based on load current values ​​and switches the faulty heat tracing load group based on the determination result, or performs relevant operations on the current heat tracing load group based on the current temperature and the stop temperature.

[0039] Furthermore, such as Figure 2 As shown, anomaly detection based on load current values ​​specifically includes: Determine if the load current value is greater than the abnormal threshold; If so, the currently running heat tracing load group is determined to be a faulty heat tracing load group, and the faulty heat tracing load group is disconnected and switched to the next priority heat tracing load group for operation. Otherwise, determine whether the current temperature after running the heat tracing load group is greater than or equal to the stop temperature; If so, disconnect the currently running heat tracing load group, put all heat tracing load groups into standby mode, and return to the temperature judgment steps above. Otherwise, return to the above anomaly detection steps and continue monitoring the real-time load current value.

[0040] Furthermore, fault marking is performed on the faulty heat tracing load group, and fault information is generated by combining its unique number; Based on the fault information, a fault warning is sent to the corresponding terminal; A faulty heat tracing load group that has been marked as faulty cannot participate in the rotation mechanism until it is restored to normal.

[0041] Furthermore, if one of the heat tracing load groups fails, the faulty heat tracing load group is immediately disconnected, and the remaining fault-free heat tracing load groups continue to use the rotation mechanism to ensure that the heating function is not interrupted. At the same time, the human-machine interface displays the unique number of the faulty heat tracing load group.

[0042] Furthermore, it also includes: manual switching mode; In case of an emergency, manual switching mode will be activated after identity verification. In manual switching mode, the corresponding target heat tracing load group can be forcibly switched to operation, and if there is no operation within a preset time, it will automatically exit manual switching mode and restore the original working mode.

[0043] This invention improves the stability and reliability of primary equipment under high-temperature operation by adding an automatic switching mechanism between manual and standby loads.

[0044] Furthermore, it also includes: remotely displaying in real time the operating status of each heat tracing load group participating in the rotation mechanism, the current temperature of the target equipment, the set start temperature, stop temperature, switching cycle, abnormal threshold and priority order, and being able to remotely modify the start temperature, stop temperature, switching cycle, abnormal threshold and priority order.

[0045] This invention allows for setting different temperature thresholds and switching cycles for different locations on the heating tape device, thus meeting the needs for precise heating.

[0046] Example 2 like Figure 3 As shown, based on the same inventive concept, this embodiment of the invention also provides a timing switching system for a heat tracing load group, including: a temperature acquisition module, a temperature judgment switching module, a period judgment switching module, and an anomaly judgment switching module; Temperature acquisition module, used to acquire the current temperature of the target device in real time; The temperature judgment and switching module is used to judge the temperature based on the current temperature and the start-up temperature, control the status of the corresponding heat tracing load group based on the judgment result, and obtain the start-up duration. The cycle judgment and switching module is used to judge the duration based on the start-up time and switching cycle, and switch other heat tracing load groups based on the judgment result, or monitor the load current value of the currently running heat tracing load group. The anomaly detection and switching module is used to detect anomalies based on the load current value, switch the faulty heat tracing load group based on the detection result, or perform relevant operations on the current heat tracing load group based on the current temperature and the stop temperature.

[0047] Furthermore, in this embodiment, the functional implementation methods of each functional module correspond one-to-one with the methods described above, and will not be repeated here.

[0048] Example 3 Based on the same inventive concept, the present invention also provides a computer device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When the processor executes the program stored in the memory, it can implement a timed switching method for the heat tracing load group as shown in Example 1.

[0049] Based on the same inventive concept, the present invention also provides an electronic device, which includes a processor and a memory, wherein the memory stores instructions, characterized in that the instructions are loaded and executed by the processor to implement a timing switching method for a heat tracing load group as in Embodiment 1.

[0050] The electronic device may include a processor, a communications interface, a memory, and a communication bus, wherein the processor, communications interface, and memory communicate with each other via the communication bus. The processor can call logical instructions in the memory to execute a timing switching method for a heat tracing load group as described in Embodiment 1.

[0051] Furthermore, the logical instructions in the aforementioned memory can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for timed switching of a heat tracing load group, characterized in that, include: Real-time acquisition of the target device's current temperature; Temperature is determined based on the current temperature and the start-up temperature. The state of the corresponding heat tracing load group is controlled based on the determination result, and the start-up duration is obtained. The duration is determined based on the startup time and switching cycle. Other heat tracing load groups are switched based on the determination result, or the load current value of the currently running heat tracing load group is monitored. Anomaly is determined based on the load current value, and the faulty heat tracing load group is switched based on the determination result, or relevant operations are performed on the current heat tracing load group based on the current temperature and the stop temperature.

2. The method for timed switching of a heat tracing load group according to claim 1, characterized in that, Based on the judgment results, the status of the corresponding heat tracing load groups is controlled in priority order, specifically including: Determine whether the current temperature is less than or equal to the start-up temperature; If so, the highest priority heat tracing load group will be started in order of priority, and will be used as the currently running heat tracing load group, and the corresponding start-up time will be obtained. Otherwise, keep all heat tracing load groups in standby mode.

3. The method for timed switching of a heat tracing load group according to claim 2, characterized in that, The duration determination based on the aforementioned startup duration and switching cycle specifically includes: Determine whether the startup duration is greater than or equal to the switching cycle; If so, disconnect the current heat tracing load group, switch to another heat tracing load group, obtain the corresponding startup duration, and return to the duration judgment step; Otherwise, monitor and collect the load current value of the currently operating heat tracing load group.

4. The method for timed switching of a heat tracing load group according to claim 3, characterized in that, When the startup duration is greater than or equal to the switching cycle, the system switches to the next highest priority heat tracing load group according to the priority order and obtains the corresponding startup duration. The duration determination step is returned based on the startup duration; By repeating the above duration determination steps, the rotation mechanism of the heat tracing load group is executed, and different heat tracing load groups are switched to run in sequence according to the priority order.

5. The method for timed switching of a heat tracing load group according to claim 4, characterized in that, The priority order is set manually based on historical experience or automatically based on the current performance of each heat tracing load group participating in the rotation mechanism; The higher the current performance, the higher the corresponding priority; The rotation mechanism is as follows: according to the priority order, the corresponding heat tracing load groups are switched to operate in descending order of priority.

6. The method for timed switching of a heat tracing load group according to claim 5, characterized in that, Anomaly detection based on the load current value specifically includes: Determine whether the load current value is greater than the abnormal threshold; If so, the currently running heat tracing load group is determined to be the faulty heat tracing load group, and the faulty heat tracing load group is disconnected and switched to the next priority heat tracing load group for operation. Otherwise, determine whether the current temperature after running the heat tracing load group is greater than or equal to the stop temperature; If so, disconnect the currently running heat tracing load group, put all heat tracing load groups into standby mode, and return to the temperature judgment steps above. Otherwise, return to the above anomaly detection steps and continue monitoring the real-time load current value.

7. A method for timed switching of a heat tracing load group according to claim 6, characterized in that, Based on the faulty heat tracing load group, fault marking is performed, and fault information is generated by combining its unique number; Based on the fault information, a fault warning notification is sent to the corresponding terminal. The faulty heat tracing load group that has been marked as faulty cannot participate in the rotation mechanism until it returns to normal.

8. The method for timed switching of a heat tracing load group according to claim 1, characterized in that, Also includes: Manually switch modes; In case of an emergency, manual switching mode will be activated after identity verification. In the manual switching mode, the corresponding target heat tracing load group can be forcibly switched to operation, and if there is no operation within a preset time, the manual switching mode will be automatically exited and the original working mode will be restored.

9. A method for timed switching of a heat tracing load group according to claim 1, characterized in that, Also includes: The system can remotely display in real time the operating status of each heat tracing load group participating in the rotation mechanism, the current temperature of the target device, the set start temperature, the stop temperature, the switching cycle, the abnormal threshold, and the priority order, and can remotely modify the start temperature, the stop temperature, the switching cycle, the abnormal threshold, and the priority order.

10. A timing switching system for a heat tracing load group, used to execute a timing switching method for a heat tracing load group as described in any one of claims 1-9, characterized in that, include: Temperature acquisition module, temperature judgment switching module, period judgment switching module and anomaly judgment switching module; The temperature acquisition module is used to acquire the current temperature of the target device in real time; The temperature judgment and switching module is used to judge the temperature based on the current temperature and the start-up temperature, control the state of the corresponding heat tracing load group based on the judgment result, and obtain the start-up duration. The cycle judgment and switching module is used to judge the duration based on the start-up duration and the switching cycle, switch other heat tracing load groups based on the judgment result, or monitor the load current value of the currently running heat tracing load group. The anomaly detection and switching module is used to detect anomalies based on the load current value, and switch the faulty heat tracing load group based on the detection result or perform relevant operations on the current heat tracing load group based on the current temperature and the stop temperature.

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