A power equipment fault early warning device and early warning method

Abstract

The application discloses a power equipment fault early warning device and early warning method, a tension detection device includes a tension sensing module and a tension detection belt, the tension detection belt is set around the central axis of the surface of the power equipment and closely contacts the power equipment, and a tension sensor is arranged on the tension detection belt, which is used for detecting real-time tension data on the tension detection belt and inputting the tension data into the control processor; the control processor is used for making early warning prompt to the equipment after processing the tension data; the application has the beneficial effects that the closely contacting tension detection belt is arranged on the middle of the surface of the power equipment, the tension sensor is used for detecting the tension size on the tension detection belt, and the corresponding early warning prompt is made to the power equipment according to the tension size, the bulging phenomenon in the corresponding power equipment can be found in time, further maintenance measures can be made to the equipment, and the maintenance efficiency of the power equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of fault early warning technology, and more specifically, to a fault early warning device and method for power equipment. Background Technology

[0002] High-voltage cables, power capacitors, and other electrical equipment inevitably experience internal insulation aging during operation, leading to equipment failure. The aging process, caused by factors such as electrothermal activity, results in the decomposition of the insulating medium internally, producing gas. Externally, this manifests as bulging and deformation on the outer surface of the electrical equipment.

[0003] In existing technologies, manual inspection is commonly used. This involves maintenance personnel periodically inspecting the appearance of equipment such as capacitors and cables to detect bulges or deformations. However, this method has two drawbacks: firstly, the scheduled inspections may not detect bulges promptly; secondly, relying on manual visual observation has low sensitivity and cannot detect minute bulges. As a result, cable and capacitor faults occur frequently, and in severe cases, may lead to equipment explosions and other catastrophic accidents, seriously threatening the safe operation of the power grid.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the observation method in the prior art cannot detect the bulging phenomenon of equipment in a timely manner, which may cause damage to the equipment in severe cases. The purpose is to provide a power equipment fault early warning device and early warning method that can detect the bulging phenomenon of equipment in a timely manner and take corresponding maintenance measures for the corresponding equipment.

[0006] This invention is achieved through the following technical solution:

[0007] A power equipment fault early warning device includes a tensile testing device and a control processor;

[0008] The tensile testing device includes a tensile sensing module and a tensile testing belt. The tensile testing belt is arranged around the central axis of the surface of the power equipment and is closely attached to the power equipment. The tensile sensor is arranged on the tensile testing belt to detect real-time tensile data on the tensile testing belt and input the tensile data into the control processor.

[0009] The control processor is used to process the tensile data and then issue early warnings to the equipment.

[0010] Traditional methods for detecting bulges in electrical equipment typically involve manual, periodic inspections by personnel. This involves workers periodically checking the equipment's exterior for bulges or deformations. However, this method is ineffective in timely detection of bulges, or if the bulges are subtle, they may not be immediately apparent, potentially leading to serious accidents such as explosions. This invention provides a power equipment fault early warning device. By placing a tensile testing strip tightly against the surface of the electrical equipment and using a corresponding tensile sensor to detect the tension on the strip, the device provides an early warning based on the tension level. This allows for timely detection of bulges and enables further maintenance, improving the efficiency of power equipment maintenance.

[0011] Preferably, the tensile testing device further includes an adjustment device, which is disposed on the tensile testing belt and is used to control the length of the tensile testing belt.

[0012] Preferably, at least one tensile testing device is provided on the surface of the power equipment.

[0013] Preferably, when multiple tensile testing strips are set, and when multiple tensile testing devices are set on the surface of the power equipment, the multiple tensile devices should be evenly distributed on the surface of the equipment, and the distance between two adjacent tensile testing devices should be 20cm to 50cm.

[0014] Preferably, the tensile testing band is a strap, cable tie, or tension band.

[0015] The present invention also provides a method for early warning of power equipment faults, which uses the early warning device described above to provide early warning prompts for single-phase or three-phase equipment.

[0016] Preferably, when the device being tested is a single-phase power device, the specific steps include:

[0017] Obtain the initial tension value on the tension sensor;

[0018] Obtain the maximum tensile force value detected by the tensile sensor;

[0019] The difference between the maximum tensile force value and the initial tensile force value is calculated to obtain the difference tensile force value;

[0020] Determine the percentage of the difference in tensile force relative to the initial tensile force, and issue a corresponding warning.

[0021] Preferably, when the device being tested is a three-phase power device, the method steps include:

[0022] Set the same initial tension value in each phase device;

[0023] Obtain the maximum tension value in each phase of the equipment and provide corresponding early warning prompts for equipment with larger tension values;

[0024] Determine the percentage of the difference in tension value relative to the initial tension value, and provide corresponding early warning prompts for the equipment with the relatively larger tension value among the two maximum tension values.

[0025] Preferably, the warning notification includes:

[0026] When the percentage exceeds 50% but is less than 100%, a Level 1 warning signal is output.

[0027] When the percentage is more than 100% but less than 200%, a level 2 warning signal is output.

[0028] When the percentage is more than 200% but less than 300%, a level 3 warning signal is output.

[0029] When the percentage exceeds 300%, a Level 4 warning signal will be issued.

[0030] Preferably, the first-level early warning signal is enhanced observation;

[0031] The level 2 early warning signal means that no change in the operation and maintenance strategy is required, and other insulation performance tests should be performed on the equipment with the greatest tension during the next normal power outage.

[0032] The Level 3 warning signal recommends that power be cut off as soon as possible to check the insulation status of the equipment with the greatest tensile force.

[0033] The Level 4 warning signal requires an immediate power outage and replacement of the equipment with the greatest pulling force.

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0035] This invention provides a power equipment fault early warning device and method. By setting a tensile detection strip closely attached to the middle of the surface of the power equipment and using a corresponding tensile sensor to detect the tensile force on the tensile detection strip, the device can issue a corresponding early warning to the power equipment based on the tensile force. This allows for timely detection of bulging phenomena in the power equipment and enables further maintenance measures to be taken, thereby improving the maintenance efficiency of the power equipment. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the early warning device structure;

[0038] Figure 2 This is a flowchart of the early warning method. Attached image description:

[0040] 1. Tension sensor; 2. Tension detection belt; 3. Adjustment device; 4. Control processor; 5. Power equipment. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0042] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0043] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0045] Example 1

[0046] Traditional methods for detecting capacitor bulges typically involve using a telescope for inspection. Workers use a telescope to visually inspect the capacitors and identify those with bulging deformation. Alternatively, a power outage can be requested, allowing workers to climb onto a capacitor platform and inspect each capacitor in the group. However, these methods are inefficient, failing to detect bulges promptly or if the bulges are subtle, potentially causing damage. This embodiment discloses a power equipment fault early warning device. By placing a tensile testing strip 2 tightly against the surface of the power equipment and using a corresponding tensile sensor 1 to detect the tension on the strip, the device provides an early warning based on the tension level. This allows for timely detection of bulges and enables further maintenance, improving the efficiency of power equipment maintenance.

[0047] The schematic diagram of the early warning device structure disclosed in this embodiment is as follows: Figure 1 As shown, it includes a tensile testing device and a control processor 4;

[0048] The tensile testing device includes a tensile sensing module and a tensile testing belt 2. The tensile testing belt 2 is arranged around the central axis of the surface of the power equipment and is closely attached to the power equipment. The tensile sensor 1 is arranged on the tensile testing belt 2 to detect the real-time tensile data on the tensile testing belt 2 and input the tensile data into the control processor 4.

[0049] The control processor 4 is used to process the tensile data and then issue a warning to the equipment.

[0050] In this embodiment, the tension sensor 1 is constructed by connecting and securing the two ends of the tension detection band 2 to both ends of the tension sensor 1. Since bulging of electrical equipment generally occurs in the middle of the equipment, which has a negative impact on the operation of the electrical equipment, the tension detection band 2 is placed in the middle of the electrical equipment to detect whether bulging occurs in real time. When bulging occurs, the tension detection band 2, which is secured to the electrical equipment, bulges out structurally under the influence of the bulge. When bulging occurs, a certain amount of tension is generated on the tension sensor 1. When a tension value is generated and gradually increases, it can be seen that the electrical equipment is bulging or deforming. The magnitude of the tension value determines whether the generated tension value will damage the electrical equipment.

[0051] In this embodiment, the tensile testing device further includes an adjustment device 3, which is disposed on the tensile testing belt 2 and is used to control the length of the tensile testing belt 2. The adjustment device 3 is disposed on the tensile testing belt 2 mainly to adjust the initial state of the tensile testing belt 2, so that the tensile testing belt 2 is in close contact with the surface of the power equipment and has a certain initial tensile value.

[0052] In this embodiment, at least one tensile testing device is installed on the surface of the power equipment. When the power equipment being tested is too large, a tensile testing device needs to be installed at a certain distance. The number of tensile testing devices is set according to the corresponding size of the equipment, which can ensure that the tensile testing device can be fully inspected for bulging. When multiple tensile testing strips 2 are set, and when multiple tensile testing devices are set on the surface of the power equipment, the distance between two adjacent tensile testing devices is 20cm to 50cm.

[0053] In this embodiment, the tensile testing band 2 is a strap, cable tie, or tension band. There are no further limitations on the specific tensile testing band 2, as long as it can be used to detect the tensile changes of the bulge in the equipment.

[0054] The specific implementation process is as follows: the strap is rigidly connected to the tension sensor 1; the strap is wrapped around the monitored equipment once; the output signal of the tension sensor 1 is connected to the data processor for data processing and observation; the tension adjustment device 3 is adjusted so that the output tension value of the tension sensor 1 is 10-30% of the maximum range of the tension sensor 1; if the power equipment is three-phase, the device should be installed on all three phases, and the initial tension should be the same.

[0055] The output value of tension sensor 1 is continuously monitored. For single-phase equipment, the maximum value of all installed equipment is considered as the output tension value of the monitored device. If the sensor output tension exceeds 50% of the initial tension, a level 1 warning signal is output; if the output tension exceeds 100% of the initial tension, a level 2 warning signal is output; if the output tension exceeds 200% of the initial tension, a level 3 warning signal is output; and if the output tension exceeds 300% or more of the initial tension, a level 4 warning signal is output.

[0056] For three-phase equipment, the pressure difference between different phases needs to be observed, and the maximum value of all installed equipment is regarded as the output tension value of the monitored device. If the difference in output tension between any two phase equipment sensors exceeds 50% of the initial tension, a first-level warning signal is output; if the difference exceeds 100% of the initial tension, a second-level warning signal is output; if the difference exceeds 200% of the initial tension, a third-level warning signal is output; and if the difference exceeds 300% or more of the initial tension, a fourth-level warning signal is output.

[0057] Different operational and maintenance measures will be taken based on the different levels of early warning signals.

[0058] Level 1 Warning Signal: Strengthen monitoring; no action required. Level 2 Warning Signal: No change to the operation and maintenance strategy required; conduct other insulation performance tests on the equipment with the highest tension during the next normal power outage. Level 3 Warning Signal: It is recommended to shut down the power as soon as possible to conduct insulation status testing on the equipment with the highest tension. Level 4 Warning Signal: Shut down the power immediately and replace the equipment with the highest tension.

[0059] This embodiment discloses a power equipment fault early warning device. By setting a tensile detection strip 2 tightly attached to the middle of the surface of the power equipment, and using a corresponding tensile sensor 1 to detect the tensile force on the tensile detection strip 2, the device can issue a corresponding early warning to the power equipment based on the tensile force. This device can promptly detect bulging phenomena in the corresponding power equipment and take further maintenance measures, thereby improving the maintenance efficiency of the power equipment.

[0060] Example 2

[0061] This embodiment discloses a method for early warning of power equipment faults, such as... Figure 2 As shown, the early warning device in Embodiment 1 is used to provide early warning prompts for single-phase or three-phase equipment.

[0062] When the device being tested is a single-phase electrical device, the specific steps include:

[0063] Obtain the initial tension value on the tension sensor 1;

[0064] Obtain the maximum tensile force value detected by the tensile sensor 1;

[0065] The difference between the maximum tensile force value and the initial tensile force value is calculated to obtain the difference tensile force value;

[0066] Determine the percentage of the difference in tensile force relative to the initial tensile force, and issue a corresponding warning.

[0067] When the device being tested is a three-phase electrical device, the method steps include:

[0068] Set the same initial tension value in each phase device;

[0069] Obtain the maximum tension value in each phase device, and calculate the difference between the maximum tension values ​​of any two phase devices to obtain the difference tension value;

[0070] Determine the percentage of the difference in tension value relative to the initial tension value, and provide corresponding early warning prompts for the equipment with the relatively larger tension value among the two maximum tension values.

[0071] The warning notification includes:

[0072] When the percentage exceeds 50% but is less than 100%, a Level 1 warning signal is output.

[0073] When the percentage is more than 100% but less than 200%, a level 2 warning signal is output.

[0074] When the percentage is more than 200% but less than 300%, a level 3 warning signal is output.

[0075] When the percentage exceeds 300%, a Level 4 warning signal will be issued.

[0076] The Level 1 warning signal is for enhanced observation;

[0077] The level 2 early warning signal means that no change in the operation and maintenance strategy is required, and other insulation performance tests should be performed on the equipment with the greatest tension during the next normal power outage.

[0078] The Level 3 warning signal recommends that power be cut off as soon as possible to check the insulation status of the equipment with the greatest tensile force.

[0079] The Level 4 warning signal requires an immediate power outage and replacement of the equipment with the greatest pulling force.

[0080] The specific implementation process when the device being tested is a three-phase device is as follows:

[0081] Bubbling is a common fault phenomenon in the operation of power capacitors, so this method can be used to monitor the condition of three-phase capacitors.

[0082] This device is installed on the surface of the three-phase capacitors A, B, and C in the system. The range of the tension sensor 1 is 0 to 1000 N. The strap adjustment device 3 is adjusted so that the initial tension of the three phases is the same and is 20% of the range of the tension sensor 1, i.e., 200 N, so as to continuously monitor the three-phase capacitors.

[0083] After the capacitors have been running for a period of time, it was found that the tension of capacitor A was 400N, the tension of capacitor B was 350N, and the tension of capacitor C was 280N. The maximum pressure difference between any two phases was 120N, which is 60% of the initial tension value. Therefore, a first-level warning message was issued, and the monitoring of the capacitor with the largest tension, namely capacitor A, should be increased.

[0084] After running for a period of time, the pulling force of phase A capacitor is 550N, phase B capacitor is 380N, and phase C capacitor is 340N. The maximum pulling force difference between any two phases is 210N, which is 105% of the initial pulling force. A level two warning message should be output, and phase A capacitor should be the focus of inspection during the next power outage maintenance.

[0085] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for early warning of power equipment faults, characterized in that, Power equipment fault early warning devices are used to provide early warnings for single-phase or three-phase equipment. The power equipment fault early warning device includes a tensile testing device and a control processor (4); The tensile testing device includes a tensile sensor (1) and a tensile testing belt (2). The tensile testing belt (2) is arranged around the central axis of the surface of the power equipment and is close to the power equipment. The tensile sensor (1) is arranged on the tensile testing belt (2) to detect the real-time tensile data on the tensile testing belt (2) and input the tensile data into the control processor (4). The control processor (4) is used to process the tensile data and then issue an early warning to the equipment; The early warning method includes the following steps when the detected device is a single-phase power device: obtaining the initial tension value on the tension sensor (1); obtaining the maximum tension value detected on the tension sensor (1); performing a difference operation between the maximum tension value and the initial tension value to obtain the difference tension value; determining the percentage of the difference tension value to the initial tension value, and issuing a corresponding early warning prompt. When the device being tested is a three-phase power device, the method includes the following steps: setting the same initial tension value in each phase device; obtaining the maximum tension value in each phase device, and performing a difference calculation on the maximum tension values ​​of any two phase devices to obtain the difference tension value; determining the percentage of the difference tension value to the initial tension value, and providing corresponding early warning prompts for devices with larger tension values; The warning prompts include: when the percentage exceeds 50% but is less than 100%, a Level 1 warning signal is output; when the percentage exceeds 100% but is less than 200%, a Level 2 warning signal is output; when the percentage exceeds 200% but is less than 300%, a Level 3 warning signal is output; and when the percentage exceeds 300%, a Level 4 warning signal is output.

2. The power equipment fault early warning method according to claim 1, characterized in that, The tensile testing equipment also includes an adjustment device (3), which is set on the tensile testing belt (2) and is used to control the length of the tensile testing belt (2).

3. The power equipment fault early warning method according to claim 1, characterized in that, At least one tensile testing device is installed on the surface of the power equipment.

4. The power equipment fault early warning method according to claim 3, characterized in that, When multiple tensile testing strips (2) are set, and when multiple tensile testing devices are set on the surface of the power equipment, the multiple tensile devices should be evenly distributed on the surface of the equipment, and the distance between two adjacent tensile testing devices should be 20cm to 50cm.

5. A method for early warning of power equipment faults according to any one of claims 1 to 4, characterized in that, The tensile testing band (2) is a strap, cable tie, or tension band.

6. The power equipment fault early warning method according to claim 1, characterized in that, The Level 1 warning signal is for enhanced observation; The level 2 early warning signal means that no change in the operation and maintenance strategy is required, and other insulation performance tests should be performed on the equipment with the greatest tension during the next normal power outage. The Level 3 warning signal recommends that power be cut off as soon as possible to check the insulation status of the equipment with the greatest tensile force. The Level 4 warning signal requires an immediate power outage and replacement of the equipment with the greatest pulling force.

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