Integrated reactor for shortening line transmission distance and preparation method thereof

Abstract

The application discloses an integrated reactor for shortening line transmission distance and a preparation method thereof, which comprises a core, the core is a group of closed magnetic circuit cores, the core comprises three vertically arranged core columns and iron yokes connected to upper and lower ends of the core columns, and the core columns and the iron yokes form three-phase magnetic circuits; an upper winding, the upper winding is sleeved on the core columns, and the upper winding comprises three coils; a lower winding, the lower winding is sleeved on the core columns, the lower winding comprises three coils, the three coils are respectively sleeved on lower portions of the three core columns, and the three coils of the lower winding and the three coils of the upper winding are arranged in one-to-one correspondence in an up-down mode; a clamp, the clamp is fixedly connected with the iron yokes, and the clamp clamps and fixes the core, the upper winding and the lower winding into an integrated whole; and a wiring device, the wiring device is fixed on the clamp. The application significantly shortens the line transmission distance between a power grid side and a frequency converter side, reduces the cable usage, and lowers line loss and construction cost of the system.

Description

Technical Field

[0001] This invention relates to the field of reactor technology, and in particular to an integrated reactor for shortening transmission line distance and its manufacturing method. Background Technology

[0002] Reactors are commonly used electrical devices in power electronic systems, widely applied in power transmission, filtering, and current limiting. In power transmission systems between the power grid and frequency converters, separate reactors are typically configured on both the grid and converter sides. Each reactor has its own independent core and windings, and they are connected by an external cable. This split arrangement results in a long transmission distance between the grid-side and converter-side reactors, with numerous connection points. This not only increases cable usage and system cost but also enlarges the overall space occupied by the equipment. Furthermore, the increased number of connection points also increases the potential for system failures. Therefore, an integrated reactor capable of shortening the transmission distance is needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated reactor and its manufacturing method that shortens the transmission distance of power lines, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides an integrated reactor for shortening transmission line distance, comprising:

[0005] The iron core is a set of closed magnetic circuit iron cores. The iron core includes three vertically arranged iron core columns and iron yokes connected to the upper and lower ends of the iron core columns. The iron core columns and the iron yokes enclose a three-phase magnetic circuit.

[0006] The upper winding is sleeved on the iron core column. The upper winding includes three coils, which are respectively sleeved on the upper part of the three iron core columns. The three coils are arranged side by side in the horizontal direction.

[0007] The lower winding is sleeved on the iron core column. The lower winding includes three coils, which are respectively sleeved on the lower part of the three iron core columns. The three coils of the lower winding are arranged vertically and vertically corresponding to the three coils of the upper winding. The upper winding and the lower winding share the iron core.

[0008] A clamp is disposed on the outside of the iron core and is fixedly connected to the yoke. The clamp holds and fixes the iron core, the upper winding, and the lower winding into one unit.

[0009] A wiring device is fixed on the clamp and is connected to the lead-out end of the upper winding and the lead-out end of the lower winding, respectively.

[0010] According to the integrated reactor for shortening transmission distance provided by the present invention, the core is made of stacked silicon steel sheets, which are divided into core column silicon steel sheets and yoke silicon steel sheets. The core column silicon steel sheets are stacked vertically to form the core column, and the yoke silicon steel sheets are stacked horizontally to form the yoke. The core column silicon steel sheets and the yoke silicon steel sheets are staggered at the joint.

[0011] According to the integrated reactor for shortening transmission distance provided by the present invention, each coil of the upper winding and the lower winding includes multiple windings, which are wound layer by layer from the inside to the outside along the radial direction of the iron core column. Interlayer insulation is provided between adjacent winding layers. The three coils of the upper winding are connected in series through a conductive busbar, and the three coils of the lower winding are connected in series through a conductive busbar.

[0012] According to the integrated reactor for shortening transmission distance provided by the present invention, a first temperature switch is provided inside the coil of the upper winding, and the lead of the first temperature switch is led out from the top of the upper winding; a second temperature switch is provided inside the coil of the lower winding, and the lead of the second temperature switch is led out from the bottom of the lower winding.

[0013] According to the integrated reactor for shortening transmission distance provided by the present invention, the clamping member includes an upper clamping member and a lower clamping member. The upper clamping member is disposed on the outside of the upper end yoke of the iron core, and the lower clamping member is disposed on the outside of the lower end yoke of the iron core. The upper clamping member and the lower clamping member are connected by a limiting screw. The limiting screw passes through the upper clamping member and the lower clamping member. Both ends of the limiting screw are fastened by nuts. An insulating sleeve is sleeved on the outside of the limiting screw.

[0014] According to the integrated reactor for shortening transmission distance provided by the present invention, an insulating partition is provided between the upper winding and the lower winding. The insulating partition is sleeved on the iron core column. The upper surface of the insulating partition is in contact with the lower end face of the upper winding, and the lower surface of the insulating partition is in contact with the upper end face of the lower winding. The outer surfaces of the upper winding and the lower winding are respectively covered with an insulating varnish layer. Insulating end rings are provided at the upper and lower ends of the upper winding and the lower winding, and the insulating end rings are sleeved on the iron core column.

[0015] According to the integrated reactor for shortening transmission distance provided by the present invention, the wiring device includes an upper terminal block, a middle terminal block, and a bottom terminal block. The upper terminal block is fixed to the top of the clamp and is connected to the lead-out end of the upper winding. The middle terminal block is fixed to the middle of the side of the clamp and is connected to the series connection end of the upper winding and the lower winding. The bottom terminal block is fixed to the bottom of the clamp and is connected to the lead-out end of the lower winding. Connection holes are respectively provided on the upper terminal block, the middle terminal block, and the bottom terminal block.

[0016] According to the integrated reactor for shortening transmission distance provided by the present invention, a current transformer is fixed on the clamp, and the current transformer includes three current transformers, which are respectively arranged corresponding to the three coils of the lower winding. The lead-out of the lower winding passes through the central hole of the current transformer, and the secondary terminals of the current transformer are fixed to the side of the clamp.

[0017] A method for manufacturing an integrated reactor to shorten transmission distance includes the following steps:

[0018] Step 1: Prepare a set of closed magnetic circuit iron cores, arrange three iron core columns vertically, and connect the iron yoke to the upper and lower ends of the iron core columns so that the iron core columns and the iron yoke enclose a three-phase magnetic circuit.

[0019] Step 2: Wind three coils as the upper winding, and perform insulation impregnation and drying treatment on the three coils of the completed upper winding.

[0020] Step 3: Wind three coils as the lower winding, and perform insulation impregnation and drying treatment on the three coils of the lower winding after winding.

[0021] Step 4: Place the three coils of the upper winding on the upper part of the three iron core columns, so that the three coils are arranged side by side in the horizontal direction. Place the three coils of the lower winding on the lower part of the three iron core columns, so that the three coils of the lower winding and the three coils of the upper winding are arranged in a one-to-one correspondence. The upper winding and the lower winding share the iron core.

[0022] Step 5: Place the clamp on the outside of the iron core, and fix the clamp to the yoke. The clamp will hold and fix the iron core, the upper winding and the lower winding into one unit.

[0023] Step 6: Fix the wiring device on the clamp, so that the wiring device is connected to the lead-out end of the upper winding and the lead-out end of the lower winding respectively;

[0024] Step 7: Perform overall impregnation and drying treatment on the assembled reactor, and then inspect the connection status of the wiring device with the lead-out terminals of the upper winding and the lower winding.

[0025] The present invention discloses the following technical effects:

[0026] In this invention, the upper and lower windings share the same set of iron cores, which are respectively arranged at the upper and lower parts of the iron core column. The two directly transmit electrical energy through the electromagnetic coupling of the iron cores, without the need for external cable connection. This significantly shortens the line transmission distance between the grid side and the inverter side, reduces the amount of cable used, and lowers the line loss and construction cost of the system.

[0027] This invention integrates the grid-side winding and the machine-side winding onto the same core. The core, upper winding, and lower winding are clamped and fixed together by clamps, reducing the number of independent cores, lowering the overall size and space occupied by the equipment, and reducing external connection links and failure points, thereby improving the stability and reliability of the system operation.

[0028] The wiring device of this invention is fixed on the clamp and connected to the lead-out ends of the upper winding and the lower winding respectively, realizing centralized wiring on the grid side and the inverter side, simplifying the wiring method of external wiring, reducing the number of terminals, facilitating equipment installation and subsequent maintenance, and reducing wiring costs and labor costs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an isometric view of the overall structure of the integrated reactor of the present invention;

[0031] Figure 2 This is a front view of the overall structure of the integrated reactor of the present invention;

[0032] Figure 3 This is the main circuit schematic diagram of the integrated reactor of the present invention;

[0033] Figure 4 This is a schematic diagram of the control and protection circuit of the integrated reactor of the present invention.

[0034] Among them, 1. Iron core; 2. Upper winding; 3. Lower winding; 4. Upper clamp; 5. Lower clamp; 6. Limiting screw. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-4 This invention provides an integrated reactor for shortening transmission line distance, comprising:

[0038] Iron core 1 is a set of closed magnetic circuit iron core 1. Iron core 1 includes three vertically arranged iron core 1 columns and iron yokes connected to the upper and lower ends of the iron core 1 columns. The iron core 1 columns and iron yokes enclose and form a three-phase magnetic circuit.

[0039] Upper winding 2 is sleeved on the iron core 1 column. Upper winding 2 includes three coils, which are respectively sleeved on the upper part of the three iron core 1 columns. The three coils are arranged side by side in the horizontal direction.

[0040] The lower winding 3 is sleeved on the iron core 1 column. The lower winding 3 includes three coils, which are respectively sleeved on the lower part of the three iron core 1 columns. The three coils of the lower winding 3 are arranged in a one-to-one correspondence with the three coils of the upper winding 2. The upper winding 2 and the lower winding 3 share the iron core 1.

[0041] The clamp is located on the outside of the iron core 1 and is fixedly connected to the yoke. The clamp holds the iron core 1, the upper winding 2 and the lower winding 3 together.

[0042] The wiring device is fixed on the clamp and is connected to the lead-out terminals of the upper winding 2 and the lower winding 3 respectively.

[0043] In operation, the leads of the upper winding 2 are connected to the power transmission line on the grid side via a wiring device, and the leads of the lower winding 3 are connected to the power transmission line on the inverter side via the wiring device. The three-phase current from the grid side flows into the three coils of the upper winding 2 through the wiring device. These three coils are respectively wound around the upper part of the three iron core 1 columns. The three-phase current generates alternating magnetic flux in the three coils of the upper winding 2, which flows along the closed magnetic circuit formed by the iron core 1 columns and the yoke. Since the upper winding 2 and the lower winding 3 share the same set of iron core 1, the alternating magnetic flux generated by the upper winding 2 simultaneously passes through the three coils of the lower winding 3 wound around the lower part of the iron core 1 columns. According to the principle of electromagnetic induction, the alternating magnetic flux induces an electromotive force in the three coils of the lower winding 3, generating an induced current. This induced current is transmitted to the power transmission line on the inverter side via the leads of the lower winding 3 and the wiring device, completing the transmission of electrical energy from the grid side to the inverter side. The three coils of the upper winding 2 and the lower winding 3 are arranged side by side in the horizontal direction and correspond one-to-one, ensuring the symmetry of the three-phase magnetic circuit and the balanced transmission of the three-phase current. In this process, the upper winding 2 and the lower winding 3 are arranged at the upper and lower parts of the same core 1 column, respectively, without the need for external cable connection. Current is directly transmitted from the upper winding 2 to the lower winding 3 through the electromagnetic coupling of the core 1, thus shortening the transmission distance between the grid side and the inverter side. A clamp holds the core 1, upper winding 2, and lower winding 3 together, ensuring stable positional relationships between the components. The wiring device is fixed to the clamp and connected to the leads of the upper winding 2 and the lower winding 3, respectively, realizing centralized wiring between the grid side and the inverter side.

[0044] The scheme is further optimized so that the iron core 1 is made of stacked silicon steel sheets. The silicon steel sheets are divided into iron core 1 column silicon steel sheets and iron yoke silicon steel sheets. The iron core 1 column silicon steel sheets are stacked vertically to form iron core 1 column, and the iron yoke silicon steel sheets are stacked horizontally to form iron yoke. The iron core 1 column silicon steel sheets and iron yoke silicon steel sheets are staggered at the joint.

[0045] The iron core 1 column is formed by stacking silicon steel sheets vertically, while the yoke is formed by stacking silicon steel sheets horizontally. The two are staggered at their junction, ensuring the joints between the iron core 1 column and the yoke are not on the same plane but are progressively offset. This structure reduces the air gap thickness at the joint, lowers the magnetic reluctance of the magnetic circuit, and reduces magnetic flux leakage and eddy current losses at the joint. The silicon steel sheets themselves have high permeability; the progressive stacking increases the equivalent magnetic cross-sectional area of ​​the iron core 1, improving the magnetic permeability of the magnetic circuit. This ensures that the alternating magnetic flux generated after the upper winding 2 is energized can be efficiently transmitted to the lower winding 3 through the closed magnetic circuit formed by the iron core 1 column and the yoke, reducing energy loss in the magnetic circuit.

[0046] In a further optimized design, each coil of the upper winding 2 and the lower winding 3 includes multiple windings. The multiple windings are wound layer by layer from the inside to the outside along the radial direction of the iron core 1 column. Interlayer insulation is provided between adjacent winding layers. The three coils of the upper winding 2 are connected in series through a conductive busbar, and the three coils of the lower winding 3 are connected in series through a conductive busbar.

[0047] Each coil employs multi-layer windings, wound radially from the inside out along the core column 1. This structure increases the equivalent cross-sectional area of ​​the winding conductors, reduces the DC resistance of the windings, and minimizes copper losses during current flow. Interlayer insulation is installed between adjacent winding layers to electrically isolate them, preventing short-circuit faults. The gaps between the insulation also serve as heat dissipation channels, facilitating heat transfer from the winding interior to the exterior. The three coils of the upper winding 2 are connected in series via busbars, as are the three coils of the lower winding 3. This series connection ensures that the three-phase current flows sequentially through each phase coil, guaranteeing a consistent ampere-turn count across the three-phase windings. This generates symmetrical three-phase alternating magnetic flux in the three core columns 1, maintaining the balance of the three-phase magnetic circuit.

[0048] To further optimize the design, a first temperature switch is installed inside the coil of the upper winding 2, and the lead of the first temperature switch is led out from the top of the upper winding 2. A second temperature switch is installed inside the coil of the lower winding 3, and the lead of the second temperature switch is led out from the bottom of the lower winding 3.

[0049] The first temperature switch is embedded inside the coil of the upper winding 2, and the second temperature switch is embedded inside the coil of the lower winding 3. The temperature sensing elements of the temperature switches are in direct contact with the winding wires, enabling them to sense the operating temperature of the winding coils in real time. When the winding temperature rises to the operating threshold of the temperature switch due to overload, poor heat dissipation, or excessively high ambient temperature, the contact state inside the temperature switch changes. Its leads are led out from the top of the upper winding 2 and the bottom of the lower winding 3, respectively, and connected to the external control circuit. The external control circuit triggers an alarm or cuts off the main circuit based on the on / off signal of the temperature switch, thereby providing overheat protection for the reactor and preventing the windings from accelerating insulation aging or even burning out due to excessive temperature. Independent temperature switches are provided for the upper winding 2 and the lower winding 3, allowing for separate monitoring of the temperature status of the upper and lower windings 3, preventing overheating of one side of the winding from going undetected.

[0050] The scheme is further optimized. The clamping components include an upper clamping component 4 and a lower clamping component 5. The upper clamping component 4 is located on the outside of the upper yoke of the iron core 1, and the lower clamping component 5 is located on the outside of the lower yoke of the iron core 1. The upper clamping component 4 and the lower clamping component 5 are connected by a limiting screw 6. The limiting screw 6 passes through the upper clamping component 4 and the lower clamping component 5. The two ends of the limiting screw 6 are fastened by nuts. An insulating sleeve is fitted on the outside of the limiting screw 6.

[0051] The upper clamp 4 is located on the outside of the upper yoke, and the lower clamp 5 is located on the outside of the lower yoke. The limiting screw 6 passes through the upper clamp 4 and the lower clamp 5, and both ends are tightened with nuts, thereby pulling the upper clamp 4 and the lower clamp 5 towards each other, so that the clamps form an inward clamping force on the yoke, firmly clamping and fixing the iron core 1, the upper winding 2, and the lower winding 3 into a whole. An insulating sleeve is fitted on the outside of the limiting screw 6. The insulating sleeve electrically isolates the limiting screw 6 from the mounting hole wall of the clamp and the iron core 1, preventing the limiting screw 6 from forming a closed conductive circuit with the clamp and the iron core 1, which would generate induced circulating current and additional losses. It also prevents the iron core 1 from forming multiple grounding points through the clamp and the limiting screw 6. After the nut is tightened, the clamping force of the clamp is transmitted to the iron core 1 column through the iron yoke, ensuring that the silicon steel sheets of the iron core 1 are tightly stacked, reducing the magnetostrictive vibration and operating noise of the iron core 1 under the action of alternating magnetic flux, and also ensuring that the axial position of the upper winding 2 and the lower winding 3 on the iron core 1 column does not shift.

[0052] In a further optimized design, an insulating partition is provided between the upper winding 2 and the lower winding 3. The insulating partition is fitted onto the iron core 1 column. The upper surface of the insulating partition is in contact with the lower end face of the upper winding 2, and the lower surface of the insulating partition is in contact with the upper end face of the lower winding 3. The outer surfaces of the upper winding 2 and the lower winding 3 are respectively covered with an insulating varnish layer. Insulating end rings are provided at the upper and lower ends of the upper winding 2 and the lower winding 3 respectively, and the insulating end rings are fitted onto the iron core 1 column.

[0053] An insulating partition is fitted onto the iron core 1 column and located between the upper winding 2 and the lower winding 3. Its upper surface is in contact with the lower end face of the upper winding 2, and its lower surface is in contact with the upper end face of the lower winding 3, thus electrically isolating the upper winding 2 and the lower winding 3 in the axial direction. This prevents creepage or breakdown between the upper and lower windings 3 due to potential difference. The insulating partition also serves as an axial positioning element, ensuring that the axial distance between the upper winding 2 and the lower winding 3 remains constant. An insulating varnish layer covers the outer surfaces of the upper winding 2 and the lower winding 3, isolating the winding conductors from external air, moisture, and dust, preventing corrosive media from penetrating the winding interior. Simultaneously, the insulating varnish penetrates into the gaps between the winding turns and cures, bonding and fixing the winding turns together to enhance the overall mechanical strength of the winding. The insulating end ring is sleeved on the iron core column 1 and located at the upper and lower ends of the winding. It electrically isolates the winding end from the yoke and clamps, preventing the winding end from discharging to the yoke or clamps. At the same time, the insulating end ring can uniformly distribute the electric field at the winding end and reduce the degree of electric field concentration at the end.

[0054] The design is further optimized. The wiring device includes an upper terminal block, a middle terminal block, and a bottom terminal block. The upper terminal block is fixed to the top of the clamp and is connected to the lead-out end of the upper winding 2. The middle terminal block is fixed to the middle of the side of the clamp and is connected to the series connection end of the upper winding 2 and the lower winding 3. The bottom terminal block is fixed to the bottom of the clamp and is connected to the lead-out end of the lower winding 3. Connection holes are respectively provided on the upper terminal block, the middle terminal block, and the bottom terminal block.

[0055] The upper terminal block is fixed to the top of the clamp and connected to the lead-out terminal of the upper winding 2, serving as the input port for the three-phase current from the grid side flowing into the upper winding 2. The bottom terminal block is fixed to the bottom of the clamp and connected to the lead-out terminal of the lower winding 3, serving as the output port for the induced current from the lower winding 3 to the inverter side. The middle terminal block is fixed to the middle of the side of the clamp and connected to the series connection terminal of the upper winding 2 and the lower winding 3, used for the series transition connection between the three coils of the upper winding 2 and the three coils of the lower winding 3. The three sets of terminal blocks are arranged at three different height positions (top, middle, and bottom) along the axial direction of the clamp, forming a layered wiring structure. This allows the grid-side input, the internal series connection of the winding, and the inverter-side output to be completed in independent height areas, avoiding spatial intersections and electromagnetic interference between the wiring circuits. It also facilitates the classified access of external cables and subsequent maintenance. The connection holes on each terminal block are used to securely connect to external wires or conductive bars with bolts, ensuring electrical contact area and connection reliability.

[0056] The scheme is further optimized by fixing current transformers on the clamp. There are three current transformers, which correspond to the three coils of the lower winding 3. The leads of the lower winding 3 pass through the center hole of the current transformer, and the secondary terminals of the current transformer are fixed on the side of the clamp.

[0057] Three current transformers are fixed to the clamps, corresponding to the three coils of the lower winding 3. The leads of the lower winding 3 pass through the central hole of the current transformer. The current transformers operate based on the principle of electromagnetic induction: the three-phase current in the leads of the lower winding 3 serves as the primary current, passing through the central hole of the current transformer and generating an alternating magnetic flux proportional to the primary current in the toroidal core 1 of the current transformer. This alternating magnetic flux induces a secondary current in the secondary winding of the current transformer, the magnitude of which is in a fixed proportion to the primary current. The secondary terminals of the current transformers are fixed to the side of the clamps, facilitating the transmission of the secondary current signal via cables to external measuring instruments, metering devices, or overcurrent protection devices, enabling real-time monitoring and protection of the current in each phase of the lower winding 3. By directly integrating the current transformers onto the clamps of the reactor and having the leads of the lower winding 3 pass through their central holes, there is no need to additionally mount current transformers on the external output cables, simplifying the overall system structure and reducing external installation steps.

[0058] A method for manufacturing an integrated reactor to shorten transmission distance includes the following steps:

[0059] Step 1: Prepare a set of closed magnetic circuit iron cores 1, arrange the three iron core 1 columns vertically, and connect the iron yoke to the upper and lower ends of the iron core 1 columns so that the iron core 1 columns and the iron yoke enclose and form a three-phase magnetic circuit.

[0060] Step 2: Wind three coils as upper winding 2, and perform insulation impregnation and drying treatment on the three coils of the completed upper winding 2.

[0061] Step 3: Wind three coils as the lower winding 3, and perform insulation impregnation and drying treatment on the three coils of the completed lower winding 3.

[0062] Step 4: Place the three coils of the upper winding 2 on the upper part of the three iron core 1 columns, so that the three coils are arranged side by side in the horizontal direction. Place the three coils of the lower winding 3 on the lower part of the three iron core 1 columns, so that the three coils of the lower winding 3 are arranged vertically corresponding to the three coils of the upper winding 2. The upper winding 2 and the lower winding 3 share the same iron core 1.

[0063] Step 5: Place the clamp on the outside of the iron core 1 and fix the clamp to the yoke. The iron core 1, the upper winding 2 and the lower winding 3 are clamped and fixed together by the clamp.

[0064] Step 6: Fix the wiring device on the clamp, so that the wiring device is connected to the lead-out end of the upper winding 2 and the lead-out end of the lower winding 3 respectively.

[0065] Step 7: Perform overall impregnation and drying treatment on the assembled reactor, and then inspect the connection status of the wiring device with the lead-out terminals of the upper winding 2 and the lower winding 3.

[0066] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An integrated reactor for shortening transmission distance, characterized in that, include: Iron core (1), the iron core (1) is a set of closed magnetic circuit iron core (1), the iron core (1) includes three vertically arranged iron core (1) columns and iron yokes connected to the upper and lower ends of the iron core (1) columns, the iron core (1) columns and the iron yokes enclose to form a three-phase magnetic circuit; Upper winding (2), the upper winding (2) is sleeved on the iron core (1) column, the upper winding (2) includes three coils, the three coils are respectively sleeved on the upper part of the three iron core (1) columns, and the three coils are arranged side by side in the horizontal direction; The lower winding (3) is sleeved on the iron core (1) column. The lower winding (3) includes three coils, which are respectively sleeved on the lower part of the three iron core (1) columns. The three coils of the lower winding (3) are arranged in a vertically corresponding manner with the three coils of the upper winding (2). The upper winding (2) and the lower winding (3) share the iron core (1). The clamp is disposed on the outside of the iron core (1), the clamp is fixedly connected to the iron yoke, and the clamp clamps and fixes the iron core (1), the upper winding (2) and the lower winding (3) into one unit; A wiring device is fixed on the clamp and is connected to the lead-out end of the upper winding (2) and the lead-out end of the lower winding (3) respectively.

2. The integrated reactor for shortening transmission distance according to claim 1, characterized in that, The iron core (1) is made of stacked silicon steel sheets. The silicon steel sheets are divided into iron core (1) column silicon steel sheets and iron yoke silicon steel sheets. The iron core (1) column silicon steel sheets are stacked vertically to form the iron core (1) column, and the iron yoke silicon steel sheets are stacked horizontally to form the iron yoke. The iron core (1) column silicon steel sheets and the iron yoke silicon steel sheets are staggered at the joint.

3. An integrated reactor for shortening transmission distance according to claim 1, characterized in that, Each coil of the upper winding (2) and the lower winding (3) includes multiple windings, which are wound layer by layer from the inside to the outside along the radial direction of the iron core (1) column. Interlayer insulation is provided between adjacent winding layers. The three coils of the upper winding (2) are connected in series through a conductive busbar, and the three coils of the lower winding (3) are connected in series through a conductive busbar.

4. An integrated reactor for shortening transmission distance according to claim 1, characterized in that, The upper winding (2) has a first temperature switch inside its coil, and the lead of the first temperature switch is led out from the top of the upper winding (2). The lower winding (3) has a second temperature switch inside its coil, and the lead of the second temperature switch is led out from the bottom of the lower winding (3).

5. An integrated reactor for shortening transmission distance according to claim 1, characterized in that, The clamping components include an upper clamping component (4) and a lower clamping component (5). The upper clamping component (4) is located on the outside of the upper end yoke of the iron core (1), and the lower clamping component (5) is located on the outside of the lower end yoke of the iron core (1). The upper clamping component (4) and the lower clamping component (5) are connected by a limiting screw (6). The limiting screw (6) passes through the upper clamping component (4) and the lower clamping component (5). Both ends of the limiting screw (6) are fastened by nuts. An insulating sleeve is fitted on the outside of the limiting screw (6).

6. An integrated reactor for shortening transmission distance according to claim 1, characterized in that, An insulating partition is provided between the upper winding (2) and the lower winding (3). The insulating partition is sleeved on the iron core (1) column. The upper surface of the insulating partition is in contact with the lower end face of the upper winding (2), and the lower surface of the insulating partition is in contact with the upper end face of the lower winding (3). The outer surfaces of the upper winding (2) and the lower winding (3) are respectively covered with an insulating varnish layer. Insulating end rings are provided at the upper and lower ends of the upper winding (2) and the lower winding (3). The insulating end rings are sleeved on the iron core (1) column.

7. An integrated reactor for shortening transmission distance according to claim 1, characterized in that, The wiring device includes an upper terminal block, a middle terminal block, and a bottom terminal block. The upper terminal block is fixed to the top of the clamp and is connected to the lead-out end of the upper winding (2). The middle terminal block is fixed to the middle of the side of the clamp and is connected to the series connection end of the upper winding (2) and the lower winding (3). The bottom terminal block is fixed to the bottom of the clamp and is connected to the lead-out end of the lower winding (3). Connection holes are respectively provided on the upper terminal block, the middle terminal block, and the bottom terminal block.

8. An integrated reactor for shortening transmission distance according to claim 1, characterized in that, The clamp is fixed with a current transformer, which includes three current transformers. The three current transformers are respectively arranged corresponding to the three coils of the lower winding (3). The lead-out of the lower winding (3) passes through the center hole of the current transformer. The secondary terminals of the current transformer are fixed to the side of the clamp.

9. A method for manufacturing an integrated reactor for shortening transmission line distance, based on the integrated reactor for shortening transmission line distance according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Prepare a set of closed magnetic circuit iron cores (1), arrange three iron core (1) columns vertically, and connect the iron yoke to the upper and lower ends of the iron core (1) columns so that the iron core (1) columns and the iron yoke enclose a three-phase magnetic circuit. Step 2: Wind three coils as the upper winding (2), and perform insulation impregnation and drying treatment on the three coils of the upper winding (2) after winding. Step 3: Wind three coils as the lower winding (3), and perform insulation impregnation and drying treatment on the three coils of the lower winding (3) after winding. Step 4: The three coils of the upper winding (2) are respectively sleeved on the upper part of the three iron core (1) columns, so that the three coils are arranged side by side in the horizontal direction. The three coils of the lower winding (3) are respectively sleeved on the lower part of the three iron core (1) columns, so that the three coils of the lower winding (3) and the three coils of the upper winding (2) are arranged in a one-to-one correspondence. The upper winding (2) and the lower winding (3) share the iron core (1). Step 5: Place the clamp on the outside of the iron core (1) and fix the clamp to the yoke. The iron core (1), the upper winding (2) and the lower winding (3) are clamped and fixed together by the clamp. Step 6: Fix the wiring device on the clamp, so that the wiring device is connected to the lead-out end of the upper winding (2) and the lead-out end of the lower winding (3) respectively; Step 7: The assembled reactor is subjected to overall impregnation and drying treatment, and then the connection status of the wiring device with the lead-out terminals of the upper winding (2) and the lower winding (3) is inspected.

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