Bias magnet type arc suppression coil automatic tracking compensation complete device

Abstract

The utility model discloses a bias magnet type arc suppression coil automatic tracking compensation complete device, which belongs to the technical field of bias magnet type arc suppression coils, and comprises a cabinet body, a heat dissipation shell provided with air inlet holes is sleeved outside the cabinet body, the top of the heat dissipation shell is fixedly communicated with a heat dissipation pipe, and a rotating shaft provided with heat dissipation fins at one end is hinged in the heat dissipation pipe. A gear ring fixedly sleeves the other end of the rotating shaft; a driving mechanism used for driving the gear ring to rotate is arranged on the top of the heat dissipation shell in a sliding mode. A controller, a display and a display instrument panel are arranged in the cabinet body; the controller comprises a DSP chip and an ETX module. The DSP chip is connected with the power grid capacitor and the current sensor through the ADC module, and is connected with the magnetic bias type arc suppression coil body through the DAC module. According to the utility model, through arrangement of the cooling fins, the spiral blades and the rotating shaft, preliminary heat dissipation can be carried out on the cabinet body on the premise that electric power is not used.

Description

Technical Field

[0001] The utility model belongs to the technical field of power networks, in particular to the technical field of biased arc suppression coils, and specifically relates to a complete set of automatic tracking and compensation devices for biased arc suppression coils. Background Art

[0002] The majority of medium-voltage systems in my country's urban power grids and industrial and mining enterprises operate with an ungrounded neutral point (i.e., low-current grounding). This system allows the grid to continue operating despite a single-phase ground fault, significantly reducing operating costs and improving power supply reliability. However, this power supply method is prone to arcing overvoltages and interphase short circuits when the single-phase ground current is high, posing significant risks to power supply and consuming equipment.

[0003] One way to prevent this hazard is to connect a reactor in series between the neutral point and the ground. This reactor is also known as an arc suppression coil. It can effectively reduce the current at the grounding point, thereby automatically extinguishing the arc.

[0004] In the utility model patent with publication number CN219739725U, a biased arc suppression coil is provided, which includes a shell frame and a body. A transmission assembly is arranged inside the shell frame, and the transmission assembly includes a slide rail assembly, a stabilizing wheel and a transmission pulley. A dual-axis motor is arranged on the top of the transmission pulley, and the lifting assembly includes multiple first motors, a ball screw and a stabilizing bar.

[0005] However, when the above patent document is used to dissipate heat from the device body, the dual-axis motor needs to be always working, which consumes a lot of electricity. At the same time, the dual-axis motor will also generate a lot of heat during operation, which will affect the device body. Utility Model Content

[0006] In order to solve the problem that the existing technology requires a dual-axis motor to work all the time when dissipating gas, which consumes a lot of electricity, the utility model provides a set of automatic tracking and compensation devices for biased arc suppression coils, which can accelerate the discharge of hot air in the heat dissipation shell without using electricity, thereby achieving the purpose of cooling the cabinet.

[0007] The technical solution adopted by the utility model of a complete set of automatic tracking and compensation devices for biased arc suppression coils is:

[0008] A complete set of automatic tracking and compensation devices for biased arc suppression coils includes a cabinet body, a heat dissipation shell with air inlet holes mounted on the outside of the cabinet body, a heat dissipation pipe fixedly connected to the top of the heat dissipation shell, and a rotating shaft with a heat sink set at one end hinged inside the heat dissipation tube, and a gear ring fixedly mounted on the other end of the rotating shaft; wherein, a driving mechanism for driving the gear ring to rotate is slidably mounted on the top of the heat dissipation shell.

[0009] A further improvement of the technical solution of the present utility model is that: a controller, a display and a keyboard are arranged in the cabinet; the front ends of the controller, the display and the keyboard are respectively embedded in the panel of the cabinet;

[0010] The controller includes a DSP chip and an ETX module; the DSP chip is connected to a voltage sensor and a current sensor through an ADC module; the voltage sensor includes a zero-sequence voltage sensor and a busbar secondary side voltage sensor; the current sensor includes a zero-sequence current sensor;

[0011] The DSP chip is connected to the ETX module through FIFO and ISA bus; the ETX module is provided with a keyboard interface and a display interface, which are connected to the keyboard and the display respectively; the ETX module is connected to the CPLD through the recording start line, and the CPLD is connected to the DSP chip; the DSP chip is connected to the biased arc suppression coil body through the compensation signal generator.

[0012] A further improvement of the technical solution of the present invention is that the side wall of the heat dissipation shell is detachably connected to a dust screen covering the air inlet, and a plurality of heat dissipation holes are provided on the side wall and the top of the cabinet.

[0013] A further improvement of the above technical solution of the present invention is that the rotating shaft is connected to the inner wall of the heat dissipation pipe through a bearing, and the bearing is located between the heat dissipation fin and the bearing and is fixed with a spiral blade.

[0014] A further improvement of the above technical solution of the present invention is that the outer ring of the bearing is detachably connected to the inner wall of the heat dissipation pipe, and the rotating shaft is connected to the inner ring of the bearing through a plurality of connecting rods.

[0015] A further improvement of the technical solution of the present utility model is that: the driving mechanism includes a driving motor that can move on the top of the heat dissipation shell, and the output shaft fixing sleeve of the driving motor is provided with a driving gear.

[0016] A further improvement of the above technical solution of the present invention is that: a first guide rail is provided on the top of the heat dissipation shell on one side of the heat dissipation pipe, and the drive motor is connected to the first guide rail through a guide block provided on the first guide rail; wherein, a first guide rod for guiding the drive gear is provided on the top of the heat dissipation shell on one side of the first guide rail.

[0017] A further improvement of the above technical solution of the present invention is that a second guide rail is provided on the top of the heat dissipation shell on the other side of the heat dissipation pipe, and a second guide rod for guiding the gear ring is connected to the second guide rail through a guide block.

[0018] A further improvement of the above technical solution of the present invention is that: the first guiding rod and the second guiding rod both include elastic rods fixedly connected to the corresponding guide blocks and sleeved with springs, and the top ends of the spring rods are hinged with sleeves.

[0019] Due to the adoption of the above technical solution, the technical advancements achieved by the present invention include:

[0020] When the present invention is in use, the heat generated by the cabinet will heat the air inside itself. Since the density of the hot air is lower than that of the air at room temperature, the hot air in the cabinet will rise and be discharged from the heat dissipation holes on the top of the cabinet. At the same time, the rising hot air will enter the heat dissipation pipe. When the hot air rises in the heat dissipation pipe, it will drive the spiral blades to rotate, and the rotating spiral blades will drive the rotating shaft and the heat dissipation fins to rotate. The rotating heat dissipation fins will generate an upward suction force, which can further accelerate the hot air in the heat dissipation shell and the cabinet to be discharged from the heat dissipation pipe; after the hot air in the heat dissipation shell and the cabinet is discharged, the internal pressure will be reduced. Under the action of the pressure difference, the external cold air will enter the heat dissipation shell through the air inlet holes, and enter the cabinet through the heat dissipation holes on the side walls of the cabinet, thereby cooling the cabinet, so that the cabinet can be preliminarily cooled without using electricity.

[0021] When the temperature inside the cabinet rises to a certain temperature, the cabinet cannot be fully cooled if the hot air itself is used to drive the spiral blades, the rotating shaft and the heat sink. At this time, the driving mechanism can be used to drive the ring gear to rotate. The rotating ring gear can drive the rotating shaft to rotate further faster, thereby driving the heat sink and spiral blades to rotate further faster. The accelerated rotation of the heat sink and spiral blades can further accelerate the discharge of hot air from the heat sink shell and the cabinet from the heat pipe, thereby achieving the purpose of quickly cooling the cabinet.

[0022] In the utility model, the first guide rod and the second guide rod are provided, so that the driving gear and the gear ring can be correctly engaged together, thereby allowing the driving motor to smoothly drive the rotating shaft to rotate at an accelerated speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of a complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils of the utility model;

[0025] Figure 3 This is a structural schematic diagram from another angle of a complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils of the present invention;

[0026] Figure 4 The utility model is a structural schematic diagram of a first guide rod and a second guide rod of a complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils.

[0027] In the accompanying drawings: 1, cabinet; 11, heat dissipation holes;

[0028] 2. Heat dissipation shell; 21. Air inlet; 22. Heat dissipation pipe; 23. Rotating shaft; 24. Heat sink; 25. Ring gear; 26. Dust screen; 27. Bearing; 28. Spiral blade; 29. ​​Connecting rod;

[0029] 3. Driving mechanism; 31. Driving motor; 32. Driving gear; 33. First guide rail;

[0030] 4. Second guide rail; 5. Guide block; 6. First guide rod; 7. Second guide rod; 8. Elastic rod; 81. Spring; 82. Sleeve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0032] First reference Figure 1 、 Figure 2 and Figure 3 It can be seen that the present invention includes a cabinet 1 , the exterior of which is sheathed with a heat dissipation shell 2 , and a heat dissipation pipe 22 fixedly connected to the top of the heat dissipation shell 2 for discharging hot air from the cabinet 1 and the heat dissipation shell 2 .

[0033] The cabinet 1 in this utility model can be referred to in the specific setting Figure 2 ,according to Figure 2 It can be seen that a plurality of heat dissipation holes 11 are provided on the side walls and the top of the cabinet 1 .

[0034] The heat dissipation shell 2 in the utility model can be referred to when setting it up specifically. Figure 1 、 Figure 2 and Figure 3 ,according to Figure 1 、 Figure 2 and Figure 3 It can be seen that the heat dissipation shell 2 is sleeved on the outside of the cabinet 1, and a plurality of air inlet holes 21 are opened on the side wall of the heat dissipation shell 2. At the same time, the side wall of the heat dissipation shell 2 is detachably connected with a dustproof net 26 covering the air inlet holes 21. Specifically, the four corners of the dustproof net 26 can be connected to the side wall of the heat dissipation shell 2 by bolts, so that the dustproof net 26 and the heat dissipation shell 2 are detachably connected together; continue to refer to Figure 1 、 Figure 2 and Figure 3It can be seen that the heat dissipation pipe 22 on the top of the heat dissipation shell 2 is detachably connected to the bearing 27. Specifically, the outer ring of the bearing 27 fits the inner wall of the heat dissipation pipe 22, and a bolt is provided on the outer wall of the heat dissipation pipe corresponding to the position of the bearing 27. The bolt passes through the side wall of the heat dissipation pipe 22 and is threadedly connected to the outer ring of the bearing 27, thereby realizing the detachable connection between the bearing 27 and the heat dissipation pipe 22. At the same time, the bearing 27 in the utility model can adopt the high-temperature resistant bearing 27 commonly used in the prior art; continue to refer to Figure 2 It can be seen that a vertical shaft 23 is provided at the center of the inner ring of the bearing 27. The side wall of the shaft 23 is fixedly connected to the inner ring of the bearing 27 through a plurality of connecting rods 29. The bottom end of the shaft 23 extends to the bottom of the heat pipe 22 and is fixedly connected to the inclined heat sink 24. Figure 2 The side wall of the rotating shaft 23 is located between the heat sink 24 and the bearing 27 and is fixed with a spiral blade 28, and the top of the rotating shaft 23 is fixed with a gear ring 25 through the rod body.

[0035] The top of the heat dissipation shell 2 is located on one side of the heat dissipation pipe 22, and a driving mechanism 3 for driving the gear ring 25 is provided. Figure 1 and Figure 3 ,according to Figure 1 and Figure 3 It can be seen that the driving mechanism 3 includes a first guide rail 33 located on one side of the heat dissipation pipe 22, a guide block 5 is slidably provided on the first guide rail 33, and a driving motor 31 is fixedly connected to the top of the guide block 5, and the output shaft of the driving motor 31 is fixedly sleeved with a driving gear 32 located on the same horizontal plane as the gear ring 25; continue to refer to Figure 1 and Figure 3 One side of the first guide rail 33 is fixedly connected to a first guide rod 6 for moving the driving gear 32 .

[0036] Continue to refer Figure 1 and Figure 3 The other side of the heat dissipation pipe 22 is fixedly connected to a second guide rail 4 , on which a guide block 5 is slidably provided. The top of the guide block 5 is fixedly connected to a second guide rod 7 for clamping the gear ring 25 .

[0037] In the present invention, the guide block 5 can be an electric slider commonly used in the prior art. The heat sink 24, spiral blades 28, rotating shaft 23 and gear ring 25 in the present invention are made of aluminum materials commonly used in the prior art or lightweight plastics with a density less than 1.

[0038] At the same time, the first guide rod 6 and the second guide rod 7 in the present invention can be referred to in the specific settings. Figure 4 ,according to Figure 4It can be seen that the first guide rod 6 and the second guide rod 7 both include an elastic rod 8 that can only bend along the length direction of the second guide rail 4. The top of the elastic rod 8 is hinged with a sleeve 82, and the elastic rod 8 is sleeved with a spring 81 below the sleeve 82.

[0039] In order to facilitate the control of the guide block 5 on the first guide rail 33, the guide block 5 on the second guide rail 4, and the drive motor 31 in the utility model, the inner wall of the heat dissipation shell 2 is fixedly connected with a temperature controller for controlling the guide block 5 on the first guide rail 33, the guide block 5 on the second guide rail 4, and the drive motor 31.

[0040] The working principle of the automatic tracking and compensation device of the biased arc suppression coil in this embodiment is as follows: the cabinet 1 of the utility model generates a large amount of heat when in use, and the generated heat will heat the air inside the cabinet 1 itself. Since the density of hot air is lower than that of room temperature air, the hot air in the cabinet 1 will rise and be discharged from the heat dissipation holes 11 on the top of the cabinet 1. At the same time, the rising hot air will enter the heat dissipation pipe 22. When the hot air rises in the heat dissipation pipe 22, it will drive the spiral blades 28 to rotate. The rotating spiral blades 28 drive the rotating shaft 23 and the heat dissipation fins 24 to rotate. The rotating heat dissipation fins 24 will generate an upward suction force, thereby further accelerating the hot air in the heat dissipation shell 2 and the cabinet 1 to be discharged from the heat dissipation pipe 22; after the hot air in the heat dissipation shell 2 and the cabinet 1 is discharged, the internal pressure will be reduced. Under the action of the pressure difference, the external cold air will enter the heat dissipation shell 2 through the air inlet 21, and enter the cabinet 1 through the heat dissipation holes 11 on the side wall of the cabinet 1, thereby cooling the cabinet 1, so that the cabinet 1 can be preliminarily cooled without using electricity.

[0041] When the temperature controller detects that the temperature inside the heat dissipation shell 2 is higher than 40°C, the temperature controller first controls the guide block 5 on the second guide rail 4 to drive the second guide rod 7 to move along the second guide rail 4 toward the direction of the heat dissipation pipe 22. When the guide block 5 on the second guide rail 4 moves to the end of the second guide rail 4 close to the heat dissipation pipe 22, the sleeve 82 of the second guide rod 7 will enter between two adjacent teeth of the ring gear 25 to clamp the ring gear 25 to prevent the ring gear 25 from continuing to rotate; when the guide block 5 on the second guide rail 4 moves to the end of the second guide rail 4 close to the heat dissipation pipe 22, if the sleeve 82 of the second guide rod 7 just corresponds to a certain tooth of the ring gear 25, the second guide rod 7 bends under the action of the teeth of the ring gear 25, and the teeth drive the sleeve 82 of the second guide rod 7 to rotate. As the ring gear 25 rotates, the sleeve 82 of the second guide rod 7 is located between two adjacent teeth of the ring gear 25. At this time, the second guide rod 7 returns to a vertical state and clamps the ring gear 25, so that the ring gear 25 no longer rotates.

[0042] Then the temperature controller controls the guide block 5 on the first guide rail 33 to drive the drive motor 31 and the drive gear 32 to move along the direction of the first guide rail 33 to the heat dissipation pipe 22. During the movement, the working principle is the same as that of the second guide rod 7. The first guide rod 6 will adjust the position of the teeth of the drive gear 32, so that when the guide block 5 on the first guide rail 33 moves to one end close to the heat dissipation pipe 22, the drive gear 32 and the drive gear 32 will just mesh together.

[0043] Then the temperature controller controls the guide block 5 on the second guide rail 4 to move to the original position, and controls the drive motor 31 to drive the drive gear 32 to rotate. The rotating drive gear 32 drives the ring gear 25 to accelerate the rotation. The rotating ring gear 25 can drive the rotating shaft 23 to further accelerate the rotation, thereby driving the heat sink 24 and the spiral blades 28 to further accelerate the rotation. The accelerated rotation of the heat sink 24 and the spiral blades 28 can further accelerate the hot air in the heat dissipation shell 2 and the cabinet 1 to be discharged from the heat dissipation pipe 22 until the temperature in the heat dissipation shell 2 drops below 30°C, thereby achieving the purpose of quickly cooling the cabinet 1.

[0044] Working principle:

[0045] The controller is based on a high-performance TMS320F2812 DSP and employs a 16-bit high-speed ADS8364 A / D converter to achieve 10kSPS waveform sampling. Data is transferred to the ISA bus via a FIFO for storage and analysis by the ETX host. Data such as setpoints is exchanged with the DSP via the ISA bus and DPRAM. The DSP calculates and determines ground faults, initiates waveform recording, and outputs compensation signals.

[0046] When the power grid is running, the 16-bit high-speed A / D converter ADS8364 is used to achieve 10kSPS waveform sampling to accurately detect the analog quantity of the system in real time.

[0047] The ETX module reads sampled and recorded data via the ISA bus, then performs functions such as capacitance detection, recording, and operation monitoring. Human-computer interaction is achieved through a keyboard and LCD. The ETX module connects to the CPLD via the recording enable line, which in turn connects to the DSP chip.

[0048] This utility model adopts a dynamic compensation method to fundamentally solve the problem of series resonance overvoltage in the compensation system. That is, when the power grid is operating normally, no excitation current is applied, and the arc suppression coil is tuned to a state away from the resonance point. However, the magnitude of the power grid capacitive current is detected in real time. When a single-phase grounding occurs in the power grid, the arc suppression coil is adjusted instantly (about 20ms) to implement full compensation.

[0049] In any state, once a single-phase grounding fault occurs in the power grid, the controller will instantly apply the required excitation current to the arc suppression coil to implement optimal compensation; the cabinet is also equipped with a large-screen graphic LCD display, which can display the system operating status and parameters for wave recording analysis.

[0050] In the above embodiment, the utility model provides a set of automatic tracking and compensation devices for a biased arc suppression coil. When the utility model is used, the heat generated by the cabinet will heat the air inside itself. Since the density of hot air is lower than that of room temperature air, the hot air in the cabinet will rise and be discharged from the heat dissipation holes on the top of the cabinet. At the same time, the rising hot air will enter the heat dissipation pipe. When the hot air rises in the heat dissipation pipe, it will drive the spiral blades to rotate. The rotating spiral blades drive the rotating shaft and the heat sink to rotate. The rotating heat sink will generate upward suction, thereby further accelerating the heat dissipation shell and the cabinet to be discharged from the heat dissipation pipe; after the hot air in the heat dissipation shell and the cabinet is discharged, the internal pressure will be reduced. Under the action of the pressure difference, the external cold air will enter the heat dissipation shell through the air inlet and enter the cabinet through the heat dissipation holes on the side wall of the cabinet, thereby cooling the cabinet, so that the cabinet can be preliminarily cooled without using electricity.

[0051] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. A complete set of automatic tracking and compensation devices for a bias-magnetic arc suppression coil, comprising a cabinet (1) and a bias-magnetic arc suppression coil body, characterized in that: A heat dissipation shell (2) with an air inlet (21) is mounted on the outer side of the cabinet (1), a heat dissipation pipe (22) is fixedly connected to the top of the heat dissipation shell (2), and a rotating shaft (23) with a heat dissipation fin (24) at one end is hingedly connected to the heat dissipation pipe (22), and a gear ring (25) is fixedly mounted on the other end of the rotating shaft (23); wherein a driving mechanism (3) for driving the gear ring (25) to rotate is slidably mounted on the top of the heat dissipation shell (2).

2. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 1 is characterized in that: A controller, a display, and a keyboard are arranged in the cabinet (1); the front ends of the controller, the display, and the keyboard are respectively embedded on the panel of the cabinet (1); The controller includes a DSP chip and an ETX module; the DSP chip is connected to a voltage sensor and a current sensor through an ADC module; the voltage sensor includes a zero-sequence voltage sensor and a busbar secondary side voltage sensor; the current sensor includes a zero-sequence current sensor; The DSP chip is connected to the ETX module through FIFO and ISA bus; the ETX module is provided with a keyboard interface and a display interface, which are connected to the keyboard and the display respectively; the ETX module is connected to the CPLD through the recording start line, and the CPLD is connected to the DSP chip; the DSP chip is connected to the biased arc suppression coil body through the compensation signal generator.

3. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 1, characterized in that: The side wall of the heat dissipation shell (2) of the cabinet (1) is detachably connected to a dust screen (26) covering the air inlet hole (21), and the side wall and top of the cabinet (1) are both provided with a plurality of heat dissipation holes (11).

4. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 1 is characterized in that: The rotating shaft (23) is connected to the inner wall of the heat dissipation tube (22) through a bearing (27), and the bearing (27) is located between the heat dissipation fin (24) and the bearing (27) and is fixed with a spiral blade (28).

5. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 4, characterized in that: The outer ring of the bearing (27) is detachably connected to the inner wall of the heat dissipation tube (22), and the rotating shaft (23) is connected to the inner ring of the bearing (27) through a plurality of connecting rods (29).

6. A complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to any one of claims 1 to 5, characterized in that: The driving mechanism (3) comprises a driving motor (31) movable on the top of the heat dissipation shell (2), and an output shaft fixing sleeve of the driving motor (31) is provided with a driving gear (32).

7. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 6, characterized in that: A first guide rail (33) is provided on the top of the heat dissipation shell (2) on one side of the heat dissipation tube (22), and the drive motor (31) is connected to the first guide rail (33) via a guide block (5) provided on the first guide rail (33); wherein, a first guide rod (6) for guiding the drive gear (32) is provided on the top of the heat dissipation shell (2) on one side of the first guide rail (33).

8. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 7, characterized in that: A second guide rail (4) is provided on the top of the heat dissipation shell (2) on the other side of the heat dissipation tube (22), and a second guide rod (7) for guiding the gear ring (25) is connected to the second guide rail (4) via a guide block (5).

9. The complete set of automatic tracking and compensation devices for bias-magnetic arc suppression coils according to claim 8, characterized in that: The first guide rod (6) and the second guide rod (7) each comprise an elastic rod (8) fixedly connected to the corresponding guide block (5) and sleeved with a spring (81), and a sleeve (82) is hinged at the top end of the spring (81) rod.

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