A single-phase double-column shunt reactor fault simulation device

Abstract

The utility model relates to the field of electric reactor fault simulation, especially a single -phase double -column parallel electric reactor fault simulation device, device main part is double silicon steel sheet core column structure, winding winding on the column, four around set up iron yoke, still be equipped with electrical fault simulation unit and mechanical fault simulation unit, wherein electrical fault simulation unit includes the front insulating plate and a plurality of taps of setting in device main part front, simulate the fault of turn -to -turn short circuit through short -circuit tap, the more short -circuit tap, represent the more serious fault, short -circuit tap of different position, represent the position of fault occurrence is different, and mechanical fault simulation unit includes the first loose simulation unit for simulating winding loose fault.

Description

Technical Field

[0001] This utility model relates to the field of reactor fault simulation, and in particular to a fault simulation device for a single-phase dual-column parallel reactor. Background Technology

[0002] Against the backdrop of the rapid evolution of ultra-high voltage (UHV) power transmission technology, UHV reactors, as key reactive power compensation devices in ultra-high voltage (UHV) power grids, directly impact grid stability through their voltage regulation capabilities, overvoltage suppression characteristics, and system economic operating parameters. In engineering practice, the dual-column topology, with its superior leakage flux suppression and optimized acoustic performance, has become the mainstream configuration for UHV reactors. However, the mechanical vibrations generated during long-term operation still pose a significant technical challenge, potentially inducing insulation breakdown and structural damage, leading to unplanned grid outages and jeopardizing power supply stability. Existing online monitoring systems suffer from technical bottlenecks such as insufficient data acquisition accuracy and poor adaptability of fault feature extraction algorithms, making it difficult to identify latent defects in equipment in a timely manner and exacerbating grid operation risks. Furthermore, testing the UHV equipment itself faces limitations such as high safety risks and high experimental costs.

[0003] Reactor faults have complex causes, mainly divided into electrical faults and mechanical faults. Electrical faults manifest as insulation damage, inter-turn short circuits, and overheating. Mechanical faults include loose clamping bolts, loose core, and winding deformation.

[0004] Currently, most of the data signals collected for fault diagnosis of UHV reactors come from the UHV reactors themselves in large substations. The amount of data is small and difficult to obtain.

[0005] According to the International Electrotechnical Commission (IEC), ultra-high voltage includes AC ultra-high voltage and DC ultra-high voltage. AC ultra-high voltage has a voltage level of 1000 kV and above; DC ultra-high voltage has a voltage level of ±800 kV and above. Summary of the Invention

[0006] In view of the shortcomings of existing technologies, such as difficulty in collecting vibration signals when ultra-high voltage reactors fail, this utility model proposes a fault simulation device for single-phase dual-column parallel reactors, which can simulate winding inter-turn short circuit faults and winding loosening faults, providing data support for subsequent fault diagnosis and analysis.

[0007] A fault simulation device for a single-phase dual-column parallel reactor, used for fault simulation experiments of ultra-high voltage reactors, includes:

[0008] A reactor, the reactor comprising a reactor body, wherein two windings are provided within the reactor body;

[0009] An electrical fault simulation unit used to simulate inter-turn short-circuit faults in windings;

[0010] The first loosening simulation unit is used to simulate winding loosening faults;

[0011] The electrical fault simulation unit includes a front insulation plate, which is disposed on the reactor body, and the front insulation plate is provided with tap groups corresponding to the windings one by one, each tap group containing several taps.

[0012] The first loosening simulation unit includes insulating plates located on the upper and lower sides of the winding, and several fixing bolts corresponding to the insulating plates. The fixing bolts are used to press the corresponding insulating plates against the corresponding windings.

[0013] As one possible implementation method:

[0014] Each tap group includes a first tap, a second tap, and several third taps;

[0015] A copper wire corresponding to the first tap is drawn from the head of the corresponding winding;

[0016] A copper wire corresponding to the second tap is drawn from the tail of the corresponding winding;

[0017] A copper wire corresponding to each third tap is drawn from the middle of the corresponding winding, and the copper wires corresponding to each third tap are equidistant from each other.

[0018] As one possible implementation method:

[0019] The reactor body is also equipped with two iron core columns;

[0020] It also includes a second loosening simulation unit for simulating core column loosening faults;

[0021] The second loosening simulation unit includes clamping bolts that correspond one-to-one with the core column. The clamping bolts are located at the top of the reactor body and are used to clamp the corresponding core column.

[0022] As one possible implementation method:

[0023] The reactor body also includes an upper yoke, two side iron pillars, and a lower yoke.

[0024] It also includes a third loosening simulation unit for simulating yoke lamination loosening faults;

[0025] The third loosening simulation unit includes:

[0026] Clamping devices and several clamping bolts located on both sides of the upper yoke;

[0027] Clamping devices and several clamping bolts located on both sides of the side iron pillar;

[0028] The clamping devices and several clamping bolts are located on both sides of the lower yoke;

[0029] The clamping bolts are used to press the corresponding upper yoke, side pillar, or lower yoke into place by the corresponding clamping device.

[0030] As one possible implementation method:

[0031] The clamping device is a U-shaped steel clamp.

[0032] As one possible implementation method:

[0033] It also includes a fourth loosening simulation unit for simulating loosening faults between yokes;

[0034] The fourth loosening simulation unit includes screws located at the four corners of the reactor body. The screws are tightened by each U-shaped steel clamping member to tighten the upper yoke, side iron column and lower yoke.

[0035] As one possible implementation, a data acquisition device is also included, which includes a vibration sensor and a torque sensor.

[0036] As one possible implementation method:

[0037] The data acquisition device includes a first vibration sensor located at the upper yoke corner and a second vibration sensor located at the lower yoke corner.

[0038] The beneficial effects of this utility model are as follows: By using the single-phase dual-column parallel reactor of this utility model, simulation experiments can be carried out on electrical faults and / or loosening faults corresponding to the windings under different severity and different positions. Attached Figure Description

[0039] Figure 1 This is a front structural schematic diagram of a fault simulation device for a single-phase dual-column parallel reactor according to an embodiment of this utility model;

[0040] Figure 2 This is a schematic diagram of the reverse side structure of a fault simulation device for a single-phase dual-column parallel reactor according to an embodiment of this utility model;

[0041] Figure 3 This is a side view of a fault simulation device for a single-phase dual-column parallel reactor according to an embodiment of the present invention.

[0042] Figure 4 This is a schematic diagram of the connection of the reactor inter-turn short-circuit device according to an embodiment of the present invention;

[0043] Figure 5This is a schematic diagram showing the positions of the first vibration sensor and the second vibration sensor in the embodiments of this utility model. Detailed Implementation

[0044] With the rapid development of ultra-high voltage (UHV) power transmission technology, UHV reactors, as indispensable reactive power regulation equipment in UHV transmission systems, play a crucial role in maintaining grid voltage stability, suppressing overvoltage, and improving system operational flexibility and economy. Among them, dual-column UHV reactors are widely used due to their excellent performance in controlling leakage flux, reducing noise and vibration. Given the relative difficulty of directly conducting fault experiments and acquiring fault signals on UHV reactors, simulation experiments have become a more feasible and effective research method. This invention relates to a single-phase dry-type dual-column parallel reactor (hereinafter referred to as the reactor) specifically designed for fault experiments on UHV reactors. Sensors can be directly placed on the reactor body. Compared to UHV reactor body experiments where sensors can only be placed on the tank wall, the fault signals acquired by this invention better reflect the fault characteristics.

[0045] Based on the single-phase double-column parallel reactor provided by this utility model, the main body of the device is a double silicon steel sheet iron core column structure, with windings wound on the column and iron yokes around it. It is equipped with electrical fault simulation units and mechanical fault simulation units, which can simulate various typical faults such as inter-turn short circuits, iron core column loosening, iron yoke lamination loosening, iron yoke inter-loosening, and winding loosening under different severity and location conditions. It realizes the simulation of the normal state and various fault states of the single-phase double-column parallel reactor, and can complete the research and verification test of single-phase double-column parallel reactor faults, providing strong data support for subsequent research such as fault early warning.

[0046] like Figures 1-4 As shown, the main structure of the fault simulation device includes a reactor, a simulation detection device, and a data acquisition unit;

[0047] The reactor includes a reactor body, which contains an upper yoke 57, two side iron pillars 58, a lower yoke 59, two windings 55 and 56, and two core pillars 18 and 19.

[0048] The data acquisition device includes a vibration sensor and a torque sensor, as referenced. Figure 5 In this embodiment, the data acquisition device includes a first vibration sensor located at the upper yoke rotation angle and a second vibration sensor located at the lower yoke rotation angle. When conducting various fault simulation experiments, the corresponding vibration signals collected by the first vibration sensor and the second vibration sensor provide data support for subsequent fault analysis.

[0049] The simulation detection device includes an electrical fault simulation unit and a mechanical fault simulation unit;

[0050] The electrical fault simulation unit is used to simulate inter-turn short-circuit faults in the windings. It includes a front insulating plate 3 and tap groups corresponding one-to-one with the windings 55 and 56. Each tap group contains several taps, such as... Figure 4 As shown, the front insulating plate 3 is disposed on the front of the reactor body. In this embodiment, a total of 12 copper wires are led out from the two windings 55 and 56 to the taps 6-17 of the front insulating plate 3 of the reactor body. Among them, taps 6, 7, 8, 9, 10, and 11 correspond to the winding 55; taps 12, 13, 14, 15, 16, and 17 correspond to the winding 56.

[0051] In this embodiment, each tap group includes a first tap, a second tap, and several third taps;

[0052] A copper wire corresponding to the first tap is drawn from the head of the corresponding winding;

[0053] A copper wire corresponding to the second tap is drawn from the tail of the corresponding winding;

[0054] A copper wire corresponding to each third tap is drawn from the middle of the corresponding winding, and the copper wires corresponding to each third tap are equidistant from each other.

[0055] In this embodiment, the first and last copper wires of each winding are led out from the beginning and end of the winding and connected to taps 6, 11, 12, and 17. The remaining four copper wires are led out from the middle of the winding and connected to taps 7, 8, 9, 10, 13, 14, 15, and 16. Each winding has a total of 235 turns, and each copper wire is spaced 47 turns apart.

[0056] Those skilled in the art can, according to actual needs, short-circuit taps 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, and 17 on the front insulating plate 3 to simulate winding turn short-circuit faults of different severity and locations.

[0057] For example, connecting taps 6 and 12 to the power supply and connecting taps 11 and 17 together, that is, connecting the two windings in series, simulates the normal operation of the reactor; when simulating the inter-turn short circuit state of the reactor winding, the more taps that are shorted between the two shorted taps, the more serious the fault is; shorting two taps at different positions indicates that the fault has occurred at different positions.

[0058] The mechanical failure simulation unit includes:

[0059] The first loosening simulation unit is used to simulate winding loosening faults;

[0060] The first loosening simulation unit includes insulating plates 22, 23, 24, and 25 located on the upper and lower sides of the windings 55 and 56, and 16 fixing bolts 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 53, and 54;

[0061] The insulating plates 22 and 24 and the fixing bolts 27, 29, 30, 33, 34, 37, 38, and 53 correspond to the winding 55; the insulating plates 23 and 25 and the fixing bolts 28, 31, 32, 35, 36, 39, 40, and 54 correspond to the winding 56.

[0062] The fixing bolts 27, 37, 38, and 53 press the winding 55 together with the insulating plate 22;

[0063] The fixing bolts 29, 30, 33, and 34 press the winding 55 together with the insulating plate 24;

[0064] The fixing bolts 28, 39, 40, and 54 are used to press the winding 56 together with the insulating plate 23.

[0065] The fixing bolts 31, 32, 35, and 36 press the winding 56 together with the insulating plate 25.

[0066] Note that those skilled in the art can install corresponding brackets with mounting holes on the reactor body so that the fixing bolts 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 53, 54 can press the windings 55 and 56 through the insulating plates 22, 23, 24, 25.

[0067] As one possible implementation, the data acquisition device includes a first torque sensor corresponding to the first loosening simulation unit;

[0068] The first torque sensor is used to collect the torque values ​​of the fixing bolts 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 53, and 54. The torque values ​​are collected and transmitted to a computer for real-time monitoring via a data acquisition card.

[0069] Those skilled in the art can simulate loosening faults of different severity and different windings by adjusting the clamping force of the fixing bolts according to actual needs;

[0070] For example, when fixing bolts 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 53, and 54 are not loosened, the simulated reactor is in normal operating condition. When fixing bolts 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 53, and / or 54 are loosened, the smaller the torque of the fixing bolts, the more serious the fault. Reducing the torque of different fixing bolts indicates that different windings have failed.

[0071] The system automatically determines the type and severity of the simulated fault based on the torque value collected by the first torque sensor installed on the fixing bolt. If the torque of at least one of the fixing bolts 27, 29, 30, 33, 34, 37, 38, and 53 is less than 10 N·m, it indicates that the winding 55 has become loose. If the torque of at least one of the fixing bolts 28, 31, 32, 35, 36, 39, 40, and 54 is less than 10 N·m, it indicates that the winding 56 has become loose.

[0072] As one embodiment, the mechanical failure simulation unit also includes a second loosening simulation unit for simulating core column loosening failure, which includes two clamping bolts 1 and 2;

[0073] The clamping bolts 1 and 2 correspond one-to-one with the core columns 18 and 19. The clamping bolts 1 and 2 are located at the top of the reactor body and are used to clamp the two core columns 18 and 19.

[0074] Those skilled in the art can use reactors to simulate loosening faults of different severity and different iron core columns according to actual needs;

[0075] For example, when the clamping bolts 1 and 2 are not loosened, the simulated reactor is in normal operating condition; when the clamping bolts 1 and 2 are loosened, the simulated reactor core column is in a loose state. The smaller the clamping bolt torque, the more serious the fault. Reducing the torque of different clamping bolts indicates that different core columns have failed.

[0076] In this embodiment, the data acquisition device includes a second torque sensor corresponding to the second loosening simulation unit;

[0077] The simulated fault type and degree are automatically determined by collecting the corresponding torque value from the second torque sensor installed on the clamping bolt. If the torque of at least one of the clamping bolts 1 is less than 12 N·m, it means that the core column 18 has a core column loosening fault; if the torque of at least one of the clamping bolts 2 is less than 12 N·m, it means that the core column 19 has a core column loosening fault.

[0078] As one embodiment, it also includes a third loosening simulation unit for simulating the loosening failure of the yoke stack, which includes clamping devices on both sides of the upper yoke 57, clamping devices on both sides of the side iron pillars 58, clamping devices on both sides of the lower yoke 59, and 12 clamping bolts 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52;

[0079] The clamping devices all use U-shaped steel clamps, with the U-shaped steel clamps facing away from the corresponding upper yoke, side post, or lower yoke, and the openings facing outwards. The U-shaped steel clamps include a back plate, an upper plate perpendicular to the back plate, and a lower plate.

[0080] In this embodiment, U-shaped steel clamping parts 61 are provided on both sides of the upper yoke 57, U-shaped steel clamping parts 60 are provided on both sides of the side iron column 58, and U-shaped steel clamping parts 62 are provided on both sides of the lower yoke 59.

[0081] The clamping bolts 41, 42, and 43 correspond to the U-shaped steel clamping parts 61 corresponding to the upper yoke 57; the clamping bolts 44, 45, 46, 47, 48, and 49 correspond to the U-shaped steel clamping parts 60 corresponding to the side iron column 58; the clamping bolts 50, 51, and 52 correspond to the U-shaped steel clamping parts 62 of the lower yoke 59; wherein, the clamping bolts 41, 42, and 43 are located at the upper part of the reactor body and clamp the upper yoke 57 through the back plate of the U-shaped steel clamping parts 61; the clamping bolts 44, 45, 46, 47, 48, and 49 are located at the middle part of the reactor body and clamp the side iron column 58 through the back plate of the U-shaped steel clamping parts 60; the clamping bolts 50, 51, and 52 are located at the lower part of the reactor body and clamp the lower yoke 59 through the back plate of the U-shaped steel clamping parts 62.

[0082] In this embodiment, the data acquisition device includes a third torque sensor corresponding to the third loosening simulation unit;

[0083] The third torque sensor is used to collect the torque values ​​of the clamping bolts 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, and 52. The torque values ​​are collected and transmitted to a computer for real-time monitoring via a data acquisition card.

[0084] Those skilled in the art can simulate yoke lamination loosening faults of different severity and location by adjusting the clamping force of the clamping bolts, according to actual needs.

[0085] For example, when clamping bolts 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, and 52 are not loosened, the simulated reactor is in normal operating condition. When clamping bolts 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, and / or 52 are loosened, the smaller the clamping bolt torque, the more serious the fault. Reducing the torque of different clamping bolts indicates that a fault has occurred at different positions of the yoke.

[0086] The simulated fault type and degree are automatically determined based on the torque value collected by the third torque sensor installed on the clamping bolts. If the torque of at least one of the clamping bolts 41, 42, and 43 is less than 10 N·m, it indicates that the upper yoke 57 has experienced yoke lamination loosening; if the torque of at least one of the clamping bolts 44, 45, 46, 47, 48, and 49 is less than 10 N·m, it indicates that the side iron post 58 has experienced yoke lamination loosening; if the torque of at least one of the clamping bolts 50, 51, and 52 is less than 10 N·m, it indicates that the lower yoke 59 has experienced yoke lamination loosening.

[0087] Note: When a loosening fault corresponds to multiple clamping bolts, those skilled in the art can determine and adjust the torque of one or more clamping bolts according to actual needs to conduct the corresponding loosening test.

[0088] In this embodiment, the fixing bolts 27, 37, 38, and 53, through the lower plate of the U-shaped steel clamping member 61, cause the insulating plate 22 to press downwards against the winding 55; the fixing bolts 29, 30, 33, and 34, through the upper plate of the U-shaped steel clamping member 62, cause the insulating plate 24 to press upwards against the winding 55; the fixing bolts 28, 39, 40, and 54, through the lower plate of the U-shaped steel clamping member 61, cause the insulating plate 23 to press downwards against the winding 56; and the fixing bolts 31, 32, 35, and 36, through the upper plate of the U-shaped steel clamping member 62, cause the insulating plate 25 to press upwards against the winding 56.

[0089] As one embodiment, it also includes a fourth loosening simulation unit for simulating loosening faults between yokes, which includes a U-shaped steel clamping part 61 for clamping the upper yoke 57, a U-shaped steel clamping part 62 for clamping the lower yoke 59, and four screws 4, 5, 20, and 21.

[0090] The screws 4, 5, 20, and 21 are located at the four corners of the reactor body. The upper yoke 57, side iron column 58, and lower yoke 59 are tightened by the lower plate of the U-shaped steel clamp 61 and the upper plate of the U-shaped steel clamp 62.

[0091] In this embodiment, the data acquisition device includes a fourth torque sensor corresponding to the fourth loosening simulation unit;

[0092] The fourth torque sensor is used to collect the torque values ​​of screws 4, 5, 20, and 21. The torque values ​​are collected and transmitted to a computer for real-time monitoring via a data acquisition card.

[0093] Those skilled in the art can simulate loosening faults between yokes of different severity and at different locations by adjusting the clamping force of the screw, according to actual needs;

[0094] For example, when screws 4, 5, 20, and 21 are not loosened, the simulated reactor is in normal operating condition; when screws 4, 5, 20, and / or 21 are loosened, the simulated reactor yoke is in a loose state, the smaller the screw torque, the more serious the fault; reducing the torque of different screws indicates that faults have occurred at different positions between the yokes.

[0095] The simulated fault type and degree are automatically determined by collecting the corresponding torque value from the fourth torque sensor installed on the screw. If the torque of at least one of the screws 4 and 21 is less than 15 N·m, it means that the yoke has loosened on the right side of the reactor body; if the torque of at least one of the screws 5 and 20 is less than 15 N·m, it means that the yoke has loosened on the left side of the reactor body.

[0096] Note: When a loosening fault corresponds to multiple screws, those skilled in the art can determine the torque of one or more screws to conduct the corresponding loosening test according to actual needs.

[0097] Based on this novel single-phase dual-column parallel reactor, research can be conducted on monitoring and detection devices for various typical faults, including inter-turn short circuits, core column loosening, yoke lamination loosening, inter-yoke loosening, and winding loosening, under different severity levels and locations. Characteristic analysis of fault signals (vibration signals) enables dynamic observation of fault evolution patterns under different load conditions. Furthermore, a systematic fault diagnosis model and active defense strategy system are established based on the fault characteristics.

[0098] The structure of the single-phase dual-column parallel reactor described in this utility model, the winding system, the magnetic shielding components, and other parts are designed and manufactured in accordance with standards such as IEC289:1987 reactors, GB10229-88 reactors (eqv IEC289:1987), and JB9644-1999 reactors for semiconductor electrical drives.

Claims

1. A fault simulation device for a single-phase dual-column parallel reactor, used for fault simulation experiments of ultra-high voltage reactors, characterized in that, include: A reactor, the reactor comprising a reactor body, wherein two windings are provided within the reactor body; An electrical fault simulation unit used to simulate inter-turn short-circuit faults in windings; The first loosening simulation unit is used to simulate winding loosening faults; The electrical fault simulation unit includes a front insulation plate, which is disposed on the reactor body, and the front insulation plate is provided with tap groups corresponding to the windings one by one, each tap group containing several taps. The first loosening simulation unit includes insulating plates located on the upper and lower sides of the winding, and several fixing bolts corresponding to the insulating plates. The fixing bolts are used to press the corresponding insulating plates against the corresponding windings.

2. The fault simulation device for a single-phase dual-column parallel reactor according to claim 1, characterized in that: Each tap group includes a first tap, a second tap, and several third taps; A copper wire corresponding to the first tap is drawn from the head of the corresponding winding; A copper wire corresponding to the second tap is drawn from the tail of the corresponding winding; A copper wire corresponding to each third tap is drawn from the middle of the corresponding winding, and the copper wires corresponding to each third tap are equidistant from each other.

3. The fault simulation device for a single-phase dual-column parallel reactor according to claim 1, characterized in that: The reactor body is also equipped with two iron core columns; It also includes a second loosening simulation unit for simulating core column loosening faults; The second loosening simulation unit includes clamping bolts that correspond one-to-one with the core column. The clamping bolts are located at the top of the reactor body and are used to clamp the corresponding core column.

4. The fault simulation device for a single-phase dual-column parallel reactor according to claim 1, characterized in that: The reactor body also includes an upper yoke, two side iron pillars, and a lower yoke. It also includes a third loosening simulation unit for simulating yoke lamination loosening faults; The third loosening simulation unit includes: Clamping devices and several clamping bolts located on both sides of the upper yoke; Clamping devices and several clamping bolts located on both sides of the side iron pillar; The clamping devices and several clamping bolts are located on both sides of the lower yoke; The clamping bolts are used to press the corresponding upper yoke, side pillar, or lower yoke into place by the corresponding clamping device.

5. The fault simulation device for a single-phase dual-column parallel reactor according to claim 4, characterized in that: The clamping device is a U-shaped steel clamp.

6. The fault simulation device for a single-phase dual-column parallel reactor according to claim 5, characterized in that: It also includes a fourth loosening simulation unit for simulating loosening faults between yokes; The fourth loosening simulation unit includes screws located at the four corners of the reactor body. The screws are tightened by each U-shaped steel clamping member to tighten the upper yoke, side iron column and lower yoke.

7. The fault simulation device for a single-phase dual-column parallel reactor according to any one of claims 1-6, characterized in that, It also includes a data acquisition unit, which includes a vibration sensor and a torque sensor.

8. The fault simulation device for a single-phase dual-column parallel reactor according to claim 7, characterized in that: The data acquisition device includes a first vibration sensor located at the upper yoke corner and a second vibration sensor located at the lower yoke corner.

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