A current limiting reactor for limiting current in smart microgrid household electricity consumption

Abstract

The present invention relates to the field of smart microgrid reactors, and discloses a current-limiting reactor for limiting the current of household electricity in smart microgrids, comprising an intermediate insulating tube, wherein the top and bottom of the outer side of the intermediate insulating tube are respectively fixedly provided with a first positioning sleeve and a second positioning sleeve, and the first positioning sleeve is close to the head end of the intermediate insulating tube, and six detachable positioning transverse plates are provided between the first positioning sleeve and the second positioning sleeve, and the six positioning transverse plates are arranged in a circular array on the outer side of the intermediate insulating tube. Through the detachable positioning transverse plates and the adjustment transverse plate structure on the upper and lower sides of the intermediate insulating tube, the adjustment transverse plate can be horizontally moved relative to the positioning transverse plate, and the adjustment transverse plate is provided with a winding plate for winding a coil of wire, so that before the reactor is installed, only the positioning transverse plates and the adjustment transverse plates are fixed on both sides of the intermediate insulating tube, so that the coil formed by the wires wound on both sides of the intermediate insulating tube is flat, which saves time and energy compared with existing reactors.

Description

Technical Field

[0001] The present invention relates to the field of smart microgrid reactors, and in particular to a current-limiting reactor for limiting current of household electricity in a smart microgrid. Background Art

[0002] Smart microgrid, also known as intelligent microgrid, refers to a small distribution system composed of distributed power sources, energy storage devices, energy conversion devices, related loads and monitoring and protection devices. It is a modern and miniaturized form of large-scale power systems, which can provide higher power supply reliability, more easily meet the growing needs of users, maximize the use of clean energy and promote technological innovation. With the development of smart microgrids, smart rural power grids are also built to solve rural circuit problems, ensure normal electricity use in rural areas, and achieve the goal of zero power outage time for rural households and zero power outage time due to faults. The construction of smart microgrids requires the use of limiting inductors, and the construction of rural power grids requires a certain amount of current limiting inductors.

[0003] Current-limiting reactors are inductive high-voltage electrical appliances used in power systems to limit short-circuit current, perform reactive power compensation, and perform phase shifting. They are also called air-core reactors. They have an oil-free structure, eliminating the drawbacks of oil-immersed reactors, such as oil leakage and flammability, ensuring safe operation. They also have advantages such as no iron core, no ferromagnetic saturation, and good linearity of inductance values.

[0004] However, when existing current-limiting reactors are deployed in rural areas to build smart microgrids, the winding coils on the hollow reactors are assembled in advance in the processing plant. When the rural smart microgrid is built, the distance between villages is relatively long, which makes the transportation distance of the hollow reactor long. When the existing hollow reactor is transported, the existence of the winding coils makes the entire reactor take on a larger cylindrical shape, which makes the transportation space of a single reactor larger, affecting the transportation efficiency of the reactor, and further affecting the construction cost and efficiency of the smart microgrid. In addition, the coils are in a longitudinal array state, which is easy to be affected by the bumps and vibrations of the road during transportation, causing the coils in the longitudinal array state to deviate up and down under the action of their own gravity, thereby affecting the quality of the reactor. Summary of the Invention

[0005] The present invention provides a current-limiting reactor for limiting current in smart microgrid household electricity consumption, which has the advantages of being easy to transport with high efficiency and low cost and not affecting the quality of the reactor during transportation, thus solving the technical problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a current limiting inductor for limiting current of household electricity in a smart microgrid, comprising an intermediate insulating tube, wherein the top and bottom of the outer side of the intermediate insulating tube are respectively fixedly provided with a first positioning sleeve and a second positioning sleeve, and the first positioning sleeve is close to the head end of the intermediate insulating tube, and six detachable positioning horizontal plates are provided between the first positioning sleeve and the second positioning sleeve, and the six positioning horizontal plates are arranged in a circular array on the outer side of the intermediate insulating tube, and a horizontally movable adjustment horizontal plate is provided on the positioning horizontal plate, and a limiting block is fixedly installed on the adjusting horizontal plate, and a winding plate is fixedly installed between each two limiting blocks on the upper and lower sides of the intermediate insulating tube, and a wire is wrapped around the outer side of each winding plate, and the two ends of the wire extend horizontally to the terminal board inside the intermediate insulating tube at the winding plates above and below the intermediate insulating tube, and the wires are led out from the terminal board to the upper and lower sides of the intermediate insulating tube to connect the circuit, and the outer side of the wire is covered with an elastic insulating layer.

[0007] Optionally, the positioning horizontal plate is provided with a lower slide groove facing the second positioning sleeve, the adjusting horizontal plate is movably sleeved in the lower slide groove, the outer side of the adjusting horizontal plate is adapted to the inner wall of the lower slide groove, and the top width value of the adjusting horizontal plate is greater than its bottom width value.

[0008] Optionally, a positioning slot facing the second positioning sleeve is provided on the adjusting transverse plate, the limiting block is movably sleeved in the positioning slot, and the limiting block is fixed to the adjusting transverse plate by bolts passing through the bolt holes.

[0009] Optionally, an upper slide groove is provided in the middle of the top of the positioning horizontal plate, and a movable sleeve is provided in the upper slide groove with a horizontally movable linkage vertical shaft, the bottom end of the linkage vertical shaft is fixedly connected to the top of the adjustment horizontal plate, and the top of the linkage vertical shaft is fixedly connected to a sliding block located above the positioning horizontal plate, the width of the sliding block is greater than the groove width of the upper slide groove, and a balancing buffer device is fixedly installed on one side of the top of the positioning horizontal plate, and one end of the balancing buffer device is fixedly connected to the sliding block by a bolt.

[0010] Optionally, the balancing buffer device includes a balancing tube fixedly mounted on the positioning cross plate, the internal movable sleeve of the balancing tube is provided with a piston plate, one side of the piston plate is fixedly connected to a linkage rod, the end of the linkage rod away from the piston plate is fixedly connected to the side of the sliding block, and a first spring is fixedly connected between the other side of the piston plate and the inner wall of the balancing tube.

[0011] Optionally, an insulating layer is sheathed on the outside of the first spring, and the initial state of the first spring before use is a normal relaxed state.

[0012] Optionally, the top and bottom of the outer side of the intermediate insulating cylinder are provided with a compensation wire device located on the inner side of the winding plate, and both ends of each wire are wrapped around the compensation wire device. The compensation wire device includes a first limiting block fixed in the positioning slide groove and a second limiting block fixedly installed on the outer side of the second positioning sleeve. The bottom ends of the first limiting block and the second limiting block are fixedly connected to a limiting vertical axis, an insulating belt is fixedly sleeved between the two limiting vertical axes, limiting plates are fixedly connected on both sides of the inner wall of the insulating belt, and the two limiting plates are located between the two limiting vertical axes, a second spring is fixedly connected between the two limiting plates, and an insulating layer is provided on the outside of the second spring.

[0013] Optionally, the bottom of the limiting block is designed to be stepped, and the outside of the bottom of the limiting block is higher than the inside. The top of the winding plate is placed on the stepped part of the bottom of the limiting block and is fixed with bolts from the outside of the limiting block.

[0014] The present invention provides a current-limiting reactor for limiting the current of household electricity in a smart microgrid, which has the following beneficial effects:

[0015] 1. The current-limiting reactor for limiting household electricity consumption in the smart microgrid has detachable positioning horizontal plates and an adjusting horizontal plate structure on the upper and lower sides of the middle insulating cylinder. The adjusting horizontal plate can move horizontally relative to the positioning horizontal plate. The adjusting horizontal plate is provided with a winding plate for winding the wire around the coil. Before the reactor is installed, only the positioning horizontal plate and the adjusting horizontal plate are fixed on both sides of the middle insulating cylinder, and the adjusting horizontal plate is stretched out of the positioning horizontal plate, so that the coil formed by the wires on both sides of the middle insulating cylinder is flat, which facilitates the horizontal placement and transportation of the middle insulating cylinder. Compared with existing reactors, this saves transportation space, increases the number of reactors transported at a single time, and saves time and energy.

[0016] 2. This current-limiting reactor for limiting household electricity consumption in the smart microgrid can be placed horizontally during transportation, with the middle insulating cylinder of the reactor placed horizontally, and the coils formed by the wires wound around the two sides of the middle insulating cylinder arranged in a horizontal array. This avoids the problem of existing reactors where the coils formed by the wires wound around the two sides of the middle insulating cylinder are arranged in a vertical array during transportation. This problem is easily caused by the bumpy road vibration during transportation, resulting in the coils in the vertical array being deviated up and down under the action of their own gravity, thus affecting the quality of the reactor.

[0017] 3. The current-limiting reactor used in the smart microgrid to limit the current of household electricity consumption can be moved horizontally relative to the positioning horizontal plate by adjusting the horizontal plate. A balancing buffer device is set between the adjusting horizontal plate and the positioning horizontal plate so that the mechanical stress generated by the short-circuit current of the power grid and the temperature difference when the external environment changes, which causes the coil to deform, can make the adjusting horizontal plate move relative to the middle insulating tube, thereby driving the several coils composed of the wires on the outside of the winding plate to eliminate the influence of coil deformation and avoid the problem of coil tightening and damage or loosening affecting subsequent normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the intermediate insulating tube;

[0020] Figure 3 For the present invention Figure 1 A top view of

[0021] Figure 4 For the present invention Figure 1 Schematic diagram of the positioning horizontal plate structure;

[0022] Figure 5 For the present invention Figure 1 Schematic diagram of the adjustment horizontal plate structure;

[0023] Figure 6 For the present invention Figure 1 Front view of the positioning cross plate structure;

[0024] Figure 7 For the present invention Figure 6 Side cutaway view of the positioning cross-plate structure;

[0025] Figure 8 For the present invention Figure 6 Schematic diagram of the structure of the balance buffer device;

[0026] Figure 9 For the present invention Figure 1 Schematic diagram of the compensation wire device structure;

[0027] Figure 10 For the present invention Figure 9 Top view of .

[0028] In the figure: 1. intermediate insulating cylinder; 2. first positioning sleeve; 3. second positioning sleeve; 4. positioning horizontal plate; 401. lower slide; 402. upper slide; 5. adjusting horizontal plate; 501. positioning slide; 6. limiting block; 7. winding plate; 8. conductor; 9. linkage vertical axis; 10. sliding block; 11. balancing buffer device; 111. balancing tube; 112. piston plate; 113. linkage rod; 114. first spring; 12. insulating belt; 13. limiting vertical axis; 14. first limiting block; 15. second limiting block; 16. limiting plate; 17. second spring. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1 , a current limiting reactor for limiting current of household electricity in a smart microgrid, including an intermediate insulating cylinder 1, see Figure 2 The top and bottom of the intermediate insulating tube 1 are fixedly covered with a first positioning sleeve 2 and a second positioning sleeve 3, and the first positioning sleeve 2 is close to the head end of the intermediate insulating tube 1. The first positioning sleeve 2 and the second positioning sleeve 3 are both provided with bolt holes for bolt insertion and fixing. Figure 1 and Figure 3 Six positioning transverse plates 4 are fixedly installed between the first positioning sleeve 2 and the second positioning sleeve 3, and the six positioning transverse plates 4 are fixed by bolts. The six positioning transverse plates 4 are arranged in a circular array on the outside of the middle insulating cylinder 1. Figure 1 、 Figure 4 and Figure 5 , a lower chute 401 is provided on the positioning horizontal plate 4 toward the side of the second positioning sleeve 3, and a horizontally movable adjustment horizontal plate 5 is provided in the movable sleeve of the lower chute 401. The outer side of the adjustment horizontal plate 5 is adapted to the inner wall of the lower chute 401, and the top width value of the adjustment horizontal plate 5 is greater than the bottom width value. A positioning chute 501 is provided on the adjustment horizontal plate 5 toward the side of the second positioning sleeve 3, and a plurality of bolt holes are provided on both sides of the adjustment horizontal plate 5 at the positioning chute 501. The plurality of bolt holes are arranged in a horizontal linear array on the adjustment horizontal plate 5. Please refer to Figure 1 、 Figure 6 and Figure 7A limiting block 6 is movably sleeved in the positioning slide groove 501, and the limiting block 6 is fixed to the adjusting horizontal plate 5 by bolts passing through the bolt holes. A winding plate 7 is fixedly installed between every two limiting blocks 6 on the upper and lower sides of the intermediate insulating cylinder 1. A wire 8 is wound around the outside of each winding plate 7, and the two ends of the wire 8 extend horizontally to the wiring board inside the intermediate insulating cylinder 1 at the winding plates 7 above and below the intermediate insulating cylinder 1, and the wires are led out from the wiring board to the upper and lower sides of the intermediate insulating cylinder 1 to connect the circuit. The outside of the wire 8 is covered with an elastic insulating layer.

[0031] See also Figure 6 and Figure 8 The upper slide groove 402 is provided in the middle of the top of the positioning horizontal plate 4, and the upper slide groove 402 is movably covered with a horizontally movable linkage vertical shaft 9. The bottom end of the linkage vertical shaft 9 is fixedly connected to the top of the adjusting horizontal plate 5, and the top of the linkage vertical shaft 9 is fixedly connected with a sliding block 10 located above the positioning horizontal plate 4. The width of the sliding block 10 is greater than the groove width of the upper slide groove 402. A balancing buffer device 11 is fixedly installed on one side of the top of the positioning horizontal plate 4. One end of the balancing buffer device 11 is fixedly connected to the sliding block 10 by a bolt. The buffering of the balancing buffer device 11 makes the mechanical stress generated by the short-circuit current of the power grid and the temperature difference when the external environment changes, resulting in deformation of the coil, which can make the adjusting horizontal plate 5 move relative to the middle insulating cylinder 1, thereby driving the several coils composed of the wires 8 on the outside of the winding plate 7 to eliminate the influence of coil deformation and avoid the problem of coil tightening damage or loosening affecting subsequent normal use.

[0032] The balancing buffer device 11 includes a balancing tube 111 fixedly mounted on the positioning horizontal plate 4, and a piston plate 112 is movably sleeved inside the balancing tube 111. A linkage rod 113 is fixedly connected to one side of the piston plate 112. The end of the linkage rod 113 away from the piston plate 112 is fixedly connected to the side of the sliding block 10, and a first spring 114 is fixedly connected between the other side of the piston plate 112 and the inner wall of the balancing tube 111. The initial state of the first spring 114 before use is a normal relaxed state, and an insulating layer is sleeved on the outside of the first spring 114. The restoring force of the first spring 114 after stretching or compression is utilized to provide a reverse restoring force when the wire 8 is deformed by stress, so that the coil composed of the wire 8 always remains stable and will not become loose or damaged due to excessive tightening.

[0033] See also Figure 1 、 Figure 9 and Figure 10The top and bottom of the outer side of the middle insulating cylinder 1 are provided with a compensation wire device located on the inner side of the winding plate 7. Both ends of each wire 8 are passed around the compensation wire device. The compensation wire device includes a first limiting block 14 fixed in the positioning slide 501 and a second limiting block 15 fixedly installed on the outer side of the second positioning sleeve 3. The bottom ends of the first limiting block 14 and the second limiting block 15 are fixedly connected to a limiting vertical axis 13. An insulating belt 12 is fixedly sleeved between the two limiting vertical axes 13. Both sides of the inner wall of the insulating belt 12 are fixedly connected with a limiting plate 16, and the two limiting plates 16 are fixedly connected. The limiting plates 16 are located between the two limiting vertical axes 13, and a second spring 17 is fixedly connected between the two limiting plates 16. The outside of the second spring 17 is provided with an insulating layer. In the initial state, the elastic force of the second spring 17 separates the two sides of the middle of the insulating belt 12, and one end of the wire 8 is connected to the terminal block on the inner wall of the middle insulating cylinder 1 through the outside of the insulating belt 12, so that when the wire 8 is deformed, the middle distance of the insulating belt 12 can compensate for the deformation of the wire 8, without affecting the coil composed of the wire 8 to always remain stably wound on the winding plate 7.

[0034] See also Figure 6 The bottom of the limiting block 6 is designed as a stepped design, and the outside of the bottom of the limiting block 6 is higher than the inside. The top of the winding plate 7 is placed on the stepped part of the bottom of the limiting block 6 and is fixed from the outside of the limiting block 6 with bolts so that during installation, the winding plate 7 can be inserted and fixed from the inside of the wire 8.

[0035] When the current-limiting reactor for limiting the current of household electricity in the smart microgrid is in use, before the reactor is installed, only two positioning horizontal plates 4, an adjusting horizontal plate 5, a plurality of limiting blocks 6 and a winding plate 7 are fixed on both sides of the middle insulating cylinder 1, and the adjusting horizontal plate 5 is extended along the outer side of the positioning horizontal plate 4 to the maximum movable distance between it and the middle insulating cylinder 1, and the adjusting horizontal plate 5 is fixed, and the wire 8 is wound around the winding plates 7 on both sides of the middle insulating cylinder 1. At this time, the middle insulating cylinder 1 is flat as a whole, so that brackets can be conveniently set at the upper and lower ends of the middle insulating cylinder 1. During transportation, the middle insulating cylinder 1 is always in a horizontal state, which is different from the existing reactors. After the conductor 8 is assembled, it is in a cylindrical shape, which saves space during transportation and facilitates the transportation of the reactor to various places in the village, thereby participating in the construction of a smart rural power grid, increasing the number of reactors transported in a single time, saving time and energy consumption, and, during transportation, the middle insulating cylinder 1 can be placed horizontally. At this time, the coils formed by the conductor 8 wound on both sides of the middle insulating cylinder 1 are in a horizontal array state, avoiding the need for the middle insulating cylinder 1 to be placed vertically for convenient transportation during transportation of the existing reactor due to its cylindrical structure. At this time, the coils formed by the conductor 8 wound on both sides of the middle insulating cylinder 1 are in a longitudinal array state, which is easy to transport. During transportation, due to the impact of road bumps and vibrations, the coils in the longitudinal array state deviate up and down under the action of their own gravity, thereby affecting the quality of the reactor. In order to ensure the normal use of the reactor in the future, when the reactor is transported to the designated location for installation, the vertical state of the middle insulating cylinder 1 is restored and fixed. The remaining four positioning cross plates 4 and the adjustment cross plates 5 are fixed to the upper and lower sides of the middle insulating cylinder 1, and then one end of the linkage rod 113 on each positioning cross plate 4 is fixedly connected to the sliding block 10, and the remaining winding plates 7 are inserted into the inner side of the wire 8 in sequence, and then the winding plates 7 are moved and fixed to the limiting block 6. Finally, adjust the six adjusting horizontal plates 5 to move on the positioning horizontal plates 4, that is, initially fixed to the two positioning horizontal plates 4 on both sides of the middle insulating cylinder 1, the adjusting horizontal plates 5 move toward the middle insulating cylinder 1, and on the remaining four positioning horizontal plates 4, the adjusting horizontal plates 5 move away from the middle insulating cylinder 1, and at the same time control the wire 8 to be close to the outer side of the winding plate 7, and make the linkage rods 113 on the remaining four positioning horizontal plates 4 fixed to the sliding blocks 10 thereon, so as to utilize the restoring force of the first springs 114 on the six positioning horizontal plates 4 to make the horizontal spacing between the middle insulating cylinder 1 of each adjusting horizontal plate 5 the same, so that the coil is formed into a complete cylindrical shape.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A current limiting reactor for limiting current of household electricity in a smart microgrid, comprising an intermediate insulating cylinder (1), characterized in that: The top and bottom of the outer side of the intermediate insulating tube (1) are respectively fixedly sleeved with a first positioning sleeve (2) and a second positioning sleeve (3), and the first positioning sleeve (2) is close to the head end of the intermediate insulating tube (1). Six detachable positioning transverse plates (4) are provided between the first positioning sleeve (2) and the second positioning sleeve (3), and the six positioning transverse plates (4) are arranged in a circumferential array on the outer side of the intermediate insulating tube (1). A horizontally movable adjustment transverse plate (5) is provided on the positioning transverse plate (4), and a limiting block (6) is fixedly installed on the adjustment transverse plate (5). A winding plate (7) is fixedly installed between each two limiting blocks (6) on the upper and lower sides of the intermediate insulating tube (1). A wire (8) is wound around the outer side of each winding plate (7), and the two ends of the wire (8) extend horizontally to the wiring board inside the intermediate insulating tube (1) at the winding plates (7) above and below the intermediate insulating tube (1), and lead out of the upper and lower sides of the intermediate insulating tube (1) from the wiring board to connect the circuit. The outer side of the wire (8) is covered with an elastic insulating layer.

2. A current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 1, characterized in that: The positioning transverse plate (4) is provided with a lower chute (401) facing the side of the second positioning sleeve (3), and the adjusting transverse plate (5) is movably sleeved in the lower chute (401), the outer side of the adjusting transverse plate (5) is adapted to the inner wall of the lower chute (401), and the top width value of the adjusting transverse plate (5) is greater than the bottom width value thereof.

3. The current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 1, characterized in that: The adjusting transverse plate (5) is provided with a positioning slot (501) facing one side of the second positioning sleeve (3), the limiting block (6) is movably sleeved in the positioning slot (501), and the limiting block (6) is fixed to the adjusting transverse plate (5) by bolts passing through the bolt holes.

4. The current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 1, characterized in that: An upper slide groove (402) is provided in the middle of the top of the positioning horizontal plate (4), and a horizontally movable linkage vertical shaft (9) is movably mounted in the upper slide groove (402). The bottom end of the linkage vertical shaft (9) is fixedly connected to the top of the adjustment horizontal plate (5), and the top of the linkage vertical shaft (9) is fixedly connected to a sliding block (10) located above the positioning horizontal plate (4). The width of the sliding block (10) is greater than the groove width of the upper slide groove (402). A balancing buffer device (11) is fixedly installed on one side of the top of the positioning horizontal plate (4), and one end of the balancing buffer device (11) is fixedly connected to the sliding block (10) by a bolt.

5. A current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 4, characterized in that: The balancing buffer device (11) includes a balancing tube (111) fixedly mounted on a positioning horizontal plate (4), a piston plate (112) being movably sleeved inside the balancing tube (111), a linkage rod (113) being fixedly connected to one side of the piston plate (112), an end of the linkage rod (113) away from the piston plate (112) being fixedly connected to a side surface of the sliding block (10), and a first spring (114) being fixedly connected between the other side of the piston plate (112) and the inner wall of the balancing tube (111).

6. A current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 5, characterized in that: An insulating layer is sheathed on the outside of the first spring (114), and the initial state of the first spring (114) before use is a normal relaxed state.

7. The current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 1, characterized in that: The top and bottom of the outer side of the intermediate insulating cylinder (1) are both provided with a compensating wire device located inside the winding plate (7), and both ends of each wire (8) are passed around the compensating wire device. The compensating wire device includes a first limiting block (14) fixed in the positioning slot (501) and a second limiting block (15) fixedly installed on the outer side of the second positioning sleeve (3). The bottom ends of the first limiting block (14) and the second limiting block (15) are both fixedly connected to a limiting vertical axis (13), and an insulating belt (12) is fixedly sleeved between the two limiting vertical axes (13). Both sides of the inner wall of the insulating belt (12) are fixedly connected to a limiting plate (16), and the two limiting plates (16) are both located between the two limiting vertical axes (13). A second spring (17) is fixedly connected between the two limiting plates (16), and the outer side of the second spring (17) is provided with an insulating layer.

8. The current-limiting reactor for limiting current of household electricity in a smart microgrid according to claim 1, characterized in that: The bottom of the limiting block (6) is designed in a stepped manner, and the outer side of the bottom of the limiting block (6) is higher than the inner side thereof. The top of the winding plate (7) is placed on the stepped portion of the bottom of the limiting block (6) and is fixed from the outer side of the limiting block (6) with bolts.

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