Substation secondary equipment operation fault alarm device

Abstract

The application relates to the technical field of transformer substations, and discloses a transformer substation secondary equipment operation fault alarm device which comprises an input component, a passive component, a variable resistance component and a control circuit board. The input component comprises an electromagnet, the passive component comprises a first sliding strip, an attracting block and a return spring, the attracting block is arranged at one end of the first sliding strip, the attracting block is arranged opposite to the electromagnet, the control circuit is provided with a processor and a resistance measuring module for measuring the variable resistance component, the resistance of the variable resistance component changes when the first sliding strip slides, an indicating lamp is arranged on the shell, and the processor is electrically connected with the indicating lamp. When the electromagnet is connected in parallel with the transformer substation secondary equipment, the resistance value detected by the resistance measuring module is a first resistance value when the equipment normally works, the resistance value detected by the resistance measuring module changes when an operation fault occurs, then the indicating lamp gives a prompt, so that the fault can be found in time and the type of the fault can be judged and identified.

Description

Technical Field

[0001] This invention relates to the field of substation technology, and in particular to a fault alarm device for secondary equipment in a substation. Background Technology

[0002] Substation secondary equipment refers to equipment that measures, controls, monitors, and protects the operating status of primary equipment and systems. Secondary equipment includes microcomputer monitoring systems for step-up substations, voltage and reactive power control devices, etc. When secondary equipment is in operation, if operational faults occur, such as undervoltage, high voltage, or short circuits, it is difficult to effectively alarm due to the lack of alarm devices, making it difficult to quickly identify and handle faults when they occur. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a substation secondary equipment operation fault alarm device that can detect and judge the undervoltage, high voltage and short circuit of the substation secondary equipment.

[0004] To achieve the above objectives, the present invention provides a substation secondary equipment operation fault alarm device, comprising a housing and an input component, a passive component, a variable resistance component, and a control circuit board disposed within the housing. The input component includes an electromagnet. The passive component includes a first slide bar, an attraction block, and a return spring. The first slide bar is slidable along its length. The attraction block is located at one end of the first slide bar and is positioned opposite to the electromagnet. One end of the return spring is fixedly connected to the first slide bar, and the other end of the return spring is fixed relative to the housing. The variable resistance component includes a rotating shaft, a rotating disk, electrode posts, electrode strips, and conductive posts. The rotating shaft is rotatably connected to the housing. The rotating disk is disposed on the rotating shaft and is connected to the first slide bar via a first transmission component. The first slide bar is drivable. The rotating disk rotates, and multiple electrode posts pass through the rotating disk, distributed around the axis of rotation. An electrode strip is fixed below the rotating disk, its position corresponding to the positions of the multiple electrode posts. The bottom ends of the multiple electrode posts are in contact with the electrode strip. A conductive post is fixed above the rotating disk, its bottom end contacting the top end of one of the electrode posts. The control circuit board includes a processor and a resistance measurement module for detecting the variable resistor assembly. The processor is electrically connected to the resistance measurement module. The resistance measurement module includes a first probe and a second probe. The first probe is connected to the conductive post, and the second probe is connected to one end of the electrode strip. An indicator light is provided on the housing, and the processor is electrically connected to the indicator light.

[0005] As a preferred embodiment of the present invention, the passive component further includes a second slide bar arranged along the length direction of the slide bar, the second slide bar being connected to the rotating disk via a second transmission component, a touch switch being provided at the end of the second slide bar away from the electromagnet, and a buzzer being provided on the control circuit board, the touch switch being electrically connected to the buzzer.

[0006] As a preferred embodiment of the present invention, the rotating shaft is disposed on one side of the first slide bar, the first transmission assembly includes a first rack and a driven gear, the first rack is disposed on the side of the first slide bar near the rotating shaft, the driven gear is disposed on the rotating shaft, and the first rack is meshed with the driven gear.

[0007] As a preferred embodiment of the present invention, the rotating disk is disposed on one side of the second slide bar, the second transmission assembly includes a second rack, the second rack is disposed on the side of the second slide bar near the rotating disk, and a third rack that meshes with the second rack is provided on the outer side of the rotating disk.

[0008] As a preferred embodiment of the present invention, the electrode strip is arc-shaped with its center located on the axis of the rotating shaft.

[0009] As a preferred embodiment of the present invention, the passive component further includes a first fixing seat fixedly disposed within the housing, the first slide bar slidably passing through the first fixing seat, a first fixing block being provided at the top of the first fixing seat, a second fixing block being provided at the top of the first slide bar opposite to the first fixing block, the return spring being disposed along the length direction of the first slide bar, one end of the return spring being connected to the first fixing block, and the other end of the return spring being connected to the second fixing block.

[0010] As a preferred embodiment of the present invention, the input component further includes a second fixed base and a slide rail. The second fixed base is fixedly disposed within the housing. The slide rail is arranged along the length direction of the first slide bar. The electromagnet is disposed at one end of the slide rail. The slide rail slidably passes through the second fixed base. The second fixed base is provided with a positioning block. The electromagnet is provided with an adjusting stud arranged along the length direction of the slide rail. The adjusting stud passes through the positioning block. The adjusting stud is provided with two fixing nuts located at both ends of the positioning block.

[0011] As a preferred embodiment of the present invention, the indicator light includes a first light, a second light, and a third light, wherein the first light, the second light, and the third light are electrically connected to the processor.

[0012] As a preferred embodiment of the present invention, a fixing post is provided inside the housing, and a conductive rod is fixedly connected to the fixing post. One end of the conductive rod is connected to the first probe, and the other end of the conductive rod is fixedly connected to the conductive post.

[0013] As a preferred embodiment of the present invention, mounting blocks are provided on both sides of the housing, and the mounting blocks are provided with fixing holes.

[0014] This invention discloses a substation secondary equipment operation fault alarm device. Compared with the prior art, its advantages are as follows: When the substation secondary equipment is operating normally, the resistance value detected by the resistance measurement module is the first resistance value. When the substation secondary equipment experiences faults such as high voltage, undervoltage, and short circuit, the current passing through the electromagnet changes, causing a change in the attraction force of the electromagnet on the attraction block. This causes the first slider to slide, and under the action of the first transmission component, the rotating disk rotates, thereby changing the effective resistance length of the electrode strip, achieving variable resistance, and causing a change in the resistance value measured by the resistance measurement module. By comparing the resistance value detected by the resistance measurement module with the first resistance value, the processor can detect and determine whether the substation secondary equipment has an operation fault. Then, the processor controls the indicator light to provide a prompt, so as to promptly detect the fault and identify the type of fault. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 This is an internal structural diagram of the housing of the present invention;

[0017] Figure 3 This is a structural diagram of the input component of the present invention;

[0018] Figure 4 This is a structural diagram of the passive component of the present invention;

[0019] Figure 5 This is a structural diagram of the variable resistance component of the present invention;

[0020] Figure 6 This is a bottom structural diagram of the variable resistance component of the present invention;

[0021] Figure 7 yes Figure 2 A schematic diagram showing the positional relationship between the second slider and the touch switch;

[0022] In the diagram, 1. Housing; 11. Indicator light; 12. Mounting block; 2. Input component; 21. Electromagnet; 22. Second fixed base; 23. Slide rail; 24. Positioning block; 25. Adjusting stud; 26. Fixing nut; 3. Passive component; 31. First slide bar; 32. Suction block; 33. Return spring; 34. First fixed base; 341. First fixed block; 342. Second fixed block; 4. Variable resistance component; 41. Rotating shaft; 42. Rotation... 43. Electrode post; 44. Electrode strip; 45. Conductive post; 451. Fixed post; 452. Conductive rod; 46. First transmission assembly; 461. First rack; 462. Driven gear; 47. Second slide bar; 48. Second transmission assembly; 481. Second rack; 482. Third rack; 5. Control circuit board; 51. Resistance measurement module; 511. First probe; 512. Second probe; 52. Buzzer; 6. Touch switch. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] like Figure 1-7As shown, a preferred embodiment of the present invention provides a substation secondary equipment operation fault alarm device, comprising a housing 1 and an input component 2, a passive component 3, a variable resistance component 4, and a control circuit board 5 disposed within the housing 1. The input component 2 includes an electromagnet 21. The passive component 3 includes a first slide bar 31, an attraction block 32, and a return spring 33. The first slide bar 31 is slidable along its length. The attraction block 32 is located at one end of the first slide bar 31 and is positioned opposite to the electromagnet 21. One end of the return spring 33 is fixedly connected to the first slide bar 31, and the other end of the return spring 33 is fixed relative to the housing 1. The variable resistance component 4 includes a rotating shaft 41, a rotating disk 42, electrode posts 43, electrode strips 44, and conductive posts 45. The rotating shaft 41 is rotatably connected to the housing 1. The rotating disk 42 is disposed on the rotating shaft 41 and is connected to the first slide bar 31 via a first transmission component 46. The first slide bar 31 can drive the rotating disk 42. 2. Rotation: Electrode post 43 passes through rotating disk 42. Multiple electrode posts 43 are arranged and distributed around the axis of rotating shaft 41. Electrode strip 44 is fixed below rotating disk 42, and the position of electrode strip 44 corresponds to the position of multiple electrode posts 43. The bottom end of multiple electrode posts 43 is in contact with electrode strip 44. Conductive post 45 is fixed above rotating disk 42, and the bottom end of conductive post 45 contacts the top end of one of electrode posts 43. Control circuit board 5 is provided with processor and resistance measurement module 51 for detecting variable resistor component 4 (understandably, resistance measurement module 51 is provided with power supply). Processor is electrically connected to resistance measurement module 51. Resistance measurement module 51 is provided with first probe 511 and second probe 512. First probe 511 is connected to conductive post 45, and second probe 512 is connected to one end of electrode strip 44. Indicator light 11 is provided on housing 1, and processor is electrically connected to indicator light 11.

[0026] The working principle of this embodiment is as follows: In use, the device is first installed on the secondary equipment of the substation, so that the electromagnet 21 is connected in parallel with the secondary equipment (its power supply is DC). After the electromagnet 21 is energized, it generates a magnetic field, which attracts the first slider 31 to move closer to the electromagnet 21, thereby causing the return spring 33 to be in a stretched state. After stabilization, that is, when the secondary equipment of the substation is working normally, at this time... Figure 2-5As shown, there is a gap between the attraction block 32 and the electromagnet 21. The conductive post 45 contacts the top of one of the electrode posts 43. Other electrode posts 43 are arranged on both sides of the electrode post 43. The first probe 511 is connected to the top of the electrode post 43 through the conductive post 45, while the second probe 512 is connected to the bottom of the conductive post 45 through the electrode strip 44, thus forming a circuit. At this time, the resistance measured by the resistance measurement module 51 is the first resistance value. That is, when the substation secondary equipment is working normally, the resistance measured by the resistance measurement module 51 will remain at the first resistance value; when the substation secondary equipment... When a high voltage occurs, the current through the electromagnet 21 increases, increasing the attraction force of the electromagnet 21 on the attraction block 32. This causes the first slider 31 to slide closer to the electromagnet. Under the action of the first transmission assembly 46, the rotating disk 42 rotates, causing the conductive post 45 to contact the top of another electrode post 43. This changes the effective resistance length of the electrode strip 44, resulting in variable resistance. Consequently, the resistance value measured by the resistance measurement module 51 changes. It can be understood that when the rotating disk 42 rotates, the electrode strip 44 rotates with it. Ensure a conductive connection between the second probe 512 and the electrode strip 44. The second probe 512 can be connected to the electrode strip 44 via a wire, the length of which is greater than the distance between the second probe 512 and the electrode strip 44. This ensures that the second probe 512 remains conductively connected to the electrode strip 44 when it rotates. When the secondary equipment in the substation experiences undervoltage or a short circuit, the current through the electromagnet 21 decreases, thus reducing the attraction force of the electromagnet 21 on the attraction block 32 (when a short circuit occurs in the secondary equipment, since the electromagnet 21 is connected in parallel with it, almost no current flows through the electromagnet 21). This causes the first slider 31 to slide away from the electromagnetic field. Under the action of the first transmission component 46, the rotating disk 42 will rotate, which will also cause the effective resistance length of the electrode strip 44 to change. That is, the resistance value measured by the resistance measurement module 51 will change. Based on this, the processor can detect and determine whether there is an operational fault (high voltage, undervoltage, short circuit, etc.) in the substation secondary equipment by comparing the resistance value detected by the resistance measurement module 51 with the first resistance value. Then the processor controls the indicator light 11 to give a prompt so as to detect the fault and identify the type of fault in time.

[0027] In this implementation, refer to Figure 4When a high voltage occurs in the secondary equipment of the substation, the rotating disk 42 will rotate clockwise (the conductive post 45 rotates counterclockwise relative to the rotating disk 42), and the effective resistance length of the electrode strip 44 will increase. Therefore, the resistance value detected by the resistance measurement module 51 is greater than the first resistance value. When a short circuit occurs in the secondary equipment of the substation, the rotating disk 42 will rotate counterclockwise, and the effective resistance length of the electrode strip 44 will decrease. At this time, the resistance value detected by the resistance measurement module 51 is less than the first resistance value and is the second resistance value (the second resistance value can be measured before the electromagnet 21 is energized). When an undervoltage occurs in the secondary equipment of the substation, the resistance value detected by the resistance measurement module 51 will be between the first resistance value and the second resistance value.

[0028] For example, the passive component 3 also includes a second slide bar 47 arranged along the length direction of the slide bar. The second slide bar 47 is connected to the rotating disk 42 through the second transmission component 48. When the rotating disk 42 rotates, the second slide bar 47 slides along its own length direction. A touch switch 6 is provided at the end of the second slide bar 47 away from the electromagnet 21. A buzzer 52 is provided on the control circuit board 5. The touch switch 6 is electrically connected to the buzzer 52. When the substation secondary equipment is working normally, there is a gap between the second slide bar 47 and the touch switch 6, and the buzzer 52 is in the off state. When the substation... When a short circuit occurs in the secondary equipment of the station, the electromagnet 21 loses its magnetism due to the almost absence of current. At this time, under the action of the reset spring 33, the first slider 31 slides away from the electromagnet 21 and drives the rotating disk 42 to rotate through the first transmission component 46. At this time, under the action of the second transmission component 48, the second slider 47 also slides away from the electromagnet 21. Finally, the second slider 47 touches the trigger switch 6, causing the buzzer 52 to turn on and emit an alarm sound. It can be understood that the first slider 31 and the second slider 47 can be integrated.

[0029] For example, the rotating shaft 41 is located on one side of the first slide bar 31, and the first transmission assembly 46 includes a first rack 461 and a driven gear 462. The first rack 461 is located on the side of the first slide bar 31 near the rotating shaft 41, and the driven gear 462 is located on the rotating shaft 41. The first rack 461 and the driven gear 462 are meshed together. When the first slide bar 31 slides, it drives the driven gear 462 and the rotating shaft 41 to rotate, thereby causing the rotating disk 42 to rotate.

[0030] For example, the rotating disk 42 is located on one side of the second slide bar 47, and the second transmission assembly 48 includes a second rack 481. The second rack 481 is located on the side of the second slide bar 47 near the rotating disk 42. The outer side of the rotating disk 42 is provided with a third rack 482 that meshes with the second rack 481. The third rack 482 is arranged along the outer periphery of the rotating disk 42, that is, the rotating disk 42 is equivalent to a gear. The second rack 481 meshes with the third rack 482. When the rotating disk 42 rotates, the rotating disk 42 can drive the second slide bar 47 to slide along its own length direction.

[0031] For example, the electrode strip 44 is an arc shape with its center located on the axis of the rotation shaft 41. The position of the electrode strip 44 corresponds to the distribution position of the electrode posts 43, so that the bottom end of each electrode post 43 can be attached to the electrode strip 44.

[0032] For example, the passive component 3 also includes a first fixed seat 34 fixed inside the housing 1. A first slide bar 31 slidably passes through the first fixed seat 34. Through the sliding engagement between the first slide bar 31 and the first fixed seat 34, the first slide bar 31 can be slidably adjusted along its length. The top of the first fixed seat 34 is provided with a first fixed block 341, and the top of the first slide bar 31 is provided with a second fixed block 342 opposite to the first fixed block 341. A reset spring 33 is arranged along the length of the first slide bar 31. One end of the reset spring 33 is connected to the first fixed block 341, that is, one end of the reset spring 33 is fixedly connected to the first slide bar 31 through the first fixed block 341, and the other end of the reset spring 33 is connected to the second fixed block 342, so that the other end of the reset spring 33 is relatively fixed to the housing 1, ensuring that the reset spring 33 can play a role in resetting the first slide bar 31.

[0033] For example, the input component 2 further includes a second fixed base 22 and a slide rail 23. The second fixed base 22 is fixed inside the housing 1, and the slide rail 23 is arranged along the length direction of the first slide bar 31. The electromagnet 21 is disposed at one end of the slide rail 23. The slide rail 23 slidably passes through the second fixed base 22. Through the sliding connection between the slide rail 23 and the second fixed base 22, the slide rail 23 can slide along the length direction of the first slide bar 31, thereby driving the adjustment of the position of the electromagnet 21 to adjust the distance between the electromagnet 21 and the attraction block 32, thereby adjusting the position under normal conditions. The attraction between the electromagnet 21 and the attraction block 32 meets the needs of different applications. The second fixed base 22 is provided with a positioning block 24. The electromagnet 21 is provided with an adjusting stud 25 arranged along the length of the slide rail 23. The adjusting stud 25 passes through the positioning block 24. The adjusting stud 25 is provided with two fixing nuts 26 located at both ends of the positioning block 24. The two fixing nuts 26 fix the adjusting stud 25, thereby fixing the slide rail 23. After the fixing nuts 26 are loosened, the slide rail 23 can slide and adjust freely.

[0034] For example, indicator light 11 includes a first light, a second light, and a third light. The first light, the second light, and the third light are electrically connected to the processor. The first light is used to indicate that the secondary equipment of the substation is undervoltage, the second light is used to indicate that the secondary equipment of the substation is overvoltage, and the third light is used to indicate that the secondary equipment of the substation is short-circuited. Each light can emit red and green light. When the secondary equipment of the substation is working normally, all three lights emit green light. When the equipment has a corresponding condition, it will switch to emitting red light as a warning.

[0035] For example, the housing 1 is provided with a fixing post 451, and a conductive rod 452 is fixedly connected to the fixing post 451. One end of the conductive rod 452 is connected to the first probe 511, and the other end of the conductive rod 452 is fixedly connected to the conductive post 45. By fixing the fixing post 451 and the conductive post 45 to the conductive rod 452 respectively, the conductive post 45 is fixed above the rotating disk 42. In this embodiment, the conductive rod 452 is provided with a connecting ring that is rotatably connected to the rotating shaft 41, so that the conductive rod 452 extends to the side of the rotating shaft 41 near the first slide bar 31.

[0036] For example, mounting blocks 12 are provided on both sides of the housing 1, and the mounting blocks 12 are provided with fixing holes so as to fix the housing 1 by bolts, thereby facilitating the installation and fixing of this device.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A fault alarm device for secondary equipment in a substation, characterized in that: The system includes a housing and an input component, a passive component, a variable resistance component, and a control circuit board disposed within the housing. The input component includes an electromagnet. The passive component includes a first slider, an attraction block, and a return spring. The first slider is slidable along its length. The attraction block is located at one end of the first slider and is positioned opposite to the electromagnet. One end of the return spring is fixedly connected to the first slider, and the other end is fixed relative to the housing. The variable resistance component includes a rotating shaft, a rotating disk, electrode posts, electrode strips, and conductive posts. The rotating shaft is rotatably connected to the housing. The rotating disk is disposed on the rotating shaft and is connected to the first slider via a first transmission component. The first slider can drive the rotating disk to rotate. The electrode posts penetrate the rotating disk. Multiple electrode posts are arranged around the axis of the rotating shaft. The electrode strip is arc-shaped with its center on the axis of the rotating shaft. The electrode strip is fixed below the rotating disk, and its position corresponds to the position of the multiple electrode posts. The bottom ends of the multiple electrode posts are in contact with the electrode strip. The conductive post is fixed above the rotating disk, and its bottom end contacts the top end of one of the electrode posts. The control circuit board has a processor and a resistance measurement module for detecting the variable resistor assembly. The processor is electrically connected to the resistance measurement module. The resistance measurement module has a first probe and a second probe. The first probe is connected to the conductive post, and the second probe is connected to one end of the electrode strip. The housing has an indicator light, and the processor is electrically connected to the indicator light. The passive component further includes a second slide bar arranged along the length of the slide bar. The second slide bar is connected to the rotating disk via a second transmission component. A touch switch is provided at the end of the second slide bar away from the electromagnet. A buzzer is provided on the control circuit board. The touch switch is electrically connected to the buzzer. The rotating disk is located on one side of the second slide bar. The second transmission component includes a second rack. The second rack is located on the side of the second slide bar near the rotating disk. A third rack that meshes with the second rack is provided on the outer side of the rotating disk.

2. The substation secondary equipment operation fault alarm device according to claim 1, characterized in that: The rotating shaft is located on one side of the first slide bar. The first transmission assembly includes a first rack and a driven gear. The first rack is located on the side of the first slide bar near the rotating shaft, and the driven gear is located on the rotating shaft. The first rack and the driven gear are meshed together.

3. The substation secondary equipment operation fault alarm device according to claim 1, characterized in that: The passive component further includes a first fixed seat fixed inside the housing, the first slide bar slidably passing through the first fixed seat, the top of the first fixed seat is provided with a first fixed block, the top of the first slide bar is provided with a second fixed block opposite to the first fixed block, the return spring is provided along the length direction of the first slide bar, one end of the return spring is connected to the first fixed block, and the other end of the return spring is connected to the second fixed block.

4. The substation secondary equipment operation fault alarm device according to claim 1, characterized in that: The input component further includes a second fixed base and a slide rail. The second fixed base is fixed inside the housing. The slide rail is arranged along the length direction of the first slide bar. The electromagnet is located at one end of the slide rail. The slide rail slidably passes through the second fixed base. The second fixed base is provided with a positioning block. The electromagnet is provided with an adjusting stud arranged along the length direction of the slide rail. The adjusting stud passes through the positioning block. The adjusting stud is provided with two fixing nuts located at both ends of the positioning block.

5. The substation secondary equipment operation fault alarm device according to claim 1, characterized in that: The indicator light includes a first light, a second light, and a third light, which are electrically connected to the processor.

6. The substation secondary equipment operation fault alarm device according to claim 1, characterized in that: The housing is equipped with a fixing post, and a conductive rod is fixedly connected to the fixing post. One end of the conductive rod is connected to the first probe, and the other end of the conductive rod is fixedly connected to the conductive post.

7. The substation secondary equipment operation fault alarm device according to claim 1, characterized in that: Mounting blocks are provided on both sides of the housing, and the mounting blocks are provided with fixing holes.

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