Low-noise extra-high voltage shunt reactor iron core structure

Abstract

The utility model belongs to the field of paralleling reactors, and relates to a low-noise extra-high voltage paralleling reactor iron core structure which comprises iron core columns, an upper cross beam, an upper pressing beam, a lower foot pad and an iron yoke of a rectangular frame type structure, fourth pull screw rods are installed at the front ends and the rear ends of the left side and the right side of the periphery of the iron yoke, and fifth pull screw rods are installed at the front ends and the rear ends of the upper side and the lower side of the periphery of the iron yoke. VII pull screws are mounted at two corners of the upper end of the inner circumference of the iron yoke and close to the inclined seam of the iron yoke, first shock pads are mounted between the fourth pull screw, the fifth pull screw and the seventh pull screw and the iron yoke, insulating base plates and second shock pads are mounted between the upper cross beam, the upper pressing beam and the lower foot pad and the iron yoke, and an insulating rubber plate of an L-shaped structure is mounted on the outer side of the iron yoke and close to the inclined seam of the iron yoke. According to the utility model, the clamping force of the iron yoke is increased by adding the iron yoke clamping structure, and the transmission of noise is blocked while the vibration is reduced by adding the pull screw rod and arranging the insulating rubber plate at the inclined seam of the iron yoke; and by arranging a shock pad, noise generated by resonance of the pull screw rod is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to shunt reactor technical field, concretely relates to a low noise extra -high voltage shunt reactor core structure. BACKGROUND

[0002] Extra -high voltage transmission line has super long transmission distance and bears huge transmission capacity, under the no -load or light -load operating condition, the capacitive effect caused by line capacitance is extremely obvious, and then a large number of reactive power is generated, which leads to the sharp rise of line end voltage, far beyond the normal operating voltage range, and seriously threatens the system insulation performance, equipment stable operation and many other aspects. Extra -high voltage shunt reactor can accurately and efficiently compensate the excess reactive power generated by line capacitance by virtue of the inductive reactive characteristic, and keep the voltage along the line in the reasonable range, and effectively build the foundation of voltage stability of power transmission system. Therefore, the extra -high voltage shunt reactor is an indispensable core equipment component in the extra -high voltage transmission network, and deeply maintains the safe and efficient operation of the entire extra -high voltage transmission system.

[0003] Although the extra -high voltage shunt reactor plays an important role in the transmission network, the noise problem derived from its operation is like a "chronic disease", which brings many difficult problems and negative effects to the stable promotion and long -term operation of the power transmission and transformation project. As for the internal working environment of the substation, the continuous and high-decibel noise deeply interferes with the normal development of the inspection, equipment operation and on -duty work processes of the operation and maintenance personnel. For the surrounding community ecological environment, the daily life peace of the residents around the substation is often broken by the excessive noise.

[0004] In the noise generation mechanism of the extra -high voltage shunt reactor, the core structure plays a "key role". The traditional core reactor is based on its inherent characteristics, and the vibration phenomenon is inevitable. Specifically, the core adopts a special air gap structure design, and is built into a segmented core column. The adjacent core cakes are periodically "driven" under the alternating current, and are endowed with the identity of "opposite magnetic poles", and the periodic electromagnetic force is generated with the change of alternating current. The alternating electromagnetic force forces the core column to periodically deform, and inevitably produces vibration. As the "source power" of noise, vibration, with the multiple coupling of core, winding and surrounding medium (such as air, transformer oil, equipment shell, etc.), finally evolves into the noise radiated outward. As can be seen, the unique structure design of the core reactor fundamentally determines the inevitability of vibration, and noise becomes a big bottleneck problem that has long plagued the performance improvement of reactor products and the optimized development of power transmission and transformation project.

[0005] The existing noise reduction solutions in the industry have different degrees of limitations. For example, simply relying on the addition of a soundproof cover outside the device can block the noise propagation path to a certain extent, but it is difficult to achieve the ideal noise reduction expectation due to the constraints of device heat dissipation requirements and limited installation physical space, and the addition of the soundproof cover undoubtedly increases the device purchase, installation cost and land space requirement. The attempts to focus on optimizing the core, winding material and process level have made some contributions to the optimization of electrical performance, but the suppression effect is not satisfactory in the face of low-frequency noise derived from core vibration under complex operating conditions. Therefore, it is urgent to solve the technical problem of deeply studying and solving the core vibration problem to reduce the core vibration amplitude and the noise level of the reactor from the root cause. SUMMARY

[0006] To solve the above technical problems, the utility model provides a kind of low noise extra-high voltage shunt reactor core structure, and the technical scheme adopted by the utility model is as follows:

[0007] A kind of low noise extra-high voltage shunt reactor core structure, including core column, upper crossbeam, upper pressure beam, lower cushion foot and the iron yoke of rectangular frame structure, iron yoke outer periphery left and right sides install pull screw four, iron yoke outer periphery upper and lower sides install pull screw five, iron yoke inner periphery upper end two corners near the position of iron yoke bevel joint install pull screw seven, pull screw four, pull screw five and pull screw seven clamp the front and back ends of iron yoke, pull screw four, pull screw five and pull screw seven are all installed with shock pad one between pull screw four, pull screw five and pull screw seven and iron yoke, upper crossbeam, upper pressure beam and lower cushion foot are all installed with insulating pad and shock pad two between upper crossbeam, upper pressure beam and lower cushion foot and iron yoke, and the insulating rubber plate of L-shaped structure is installed at the iron yoke outer side near the iron yoke bevel joint.

[0008] Preferably, the iron yoke includes a side yoke, an upper iron yoke, and a lower iron yoke, the pull screw six penetrates the side yoke to connect a side clamp, penetrates the upper iron yoke to connect an upper clamp, and penetrates the lower iron yoke to connect a lower clamp, the height of the upper iron yoke and the lower iron yoke is greater than the height of the upper clamp and the lower clamp, and the width of the side clamp is greater than the width of the side yoke.

[0009] Preferably, the side of the side clamp extends outward relative to the side yoke, and the pull screw four is installed through a hole in the extended part. The outer side of the upper clamp and the lower clamp is welded with a punched part one to install the pull screw five. The two corners of the upper end of the inner periphery of the iron yoke near the iron yoke bevel joint are welded with a punched part two to install the pull screw seven.

[0010] Preferably, the shock pad one is a rectangular long column in cross section, and a semicircular groove cooperating with the pull screw four, the pull screw five, and the pull screw seven is formed in the length direction of the shock pad one. The shock pad one is made of an elastic material.

[0011] Preferably, the upper cross beam is arranged above the upper yoke corresponding to the position of the core column, the lower cross beam is arranged below the lower yoke corresponding to the position of the core column, the upper yoke, the upper cross beam, the lower yoke, the lower cross beam and the core column are correspondingly provided with a plurality of circular distributed through holes, and the pull screw one is installed in the through hole.

[0012] Preferably, the upper end of the pull screw one is sleeved with the pull screw disc spring one, the pull screw disc spring one is located between the upper cross beam and the upper yoke, and the two ends of the pull screw disc spring one are provided with steel washers.

[0013] Preferably, the upper yoke is provided with the upper pressing beam at the left and right ends of the upper surface, the upper yoke is provided with the upper side beam at the left and right sides, the lower yoke is provided with the lower side beam at the left and right sides, the lower yoke is provided with the lower supporting foot at the left and right ends of the lower surface, the lower supporting foot corresponds to the position of the upper pressing beam, the upper pressing beam and the lower supporting foot are connected through the pull screw three at the two ends, the upper end of the pull screw three is sleeved with the pull screw disc spring three, the two ends of the pull screw disc spring three are provided with steel washers, the upper clamping piece and the lower clamping piece are respectively provided with the pull screw two in the vertical direction, the upper end of the pull screw two is sleeved with the pull screw disc spring two, and the two ends of the pull screw disc spring two are provided with steel washers.

[0014] Preferably, the two ends of the insulating rubber plate are provided with binding holes, the upper pressing beam is welded with a hook, the horizontal end of the insulating rubber plate is fixedly bound with the hook through the binding hole, the vertical end of the insulating rubber plate is fixedly bound with the pull screw four through the binding hole, the upper part of the upper side beam and the lower part of the lower side beam are provided with the insulating partition plate, and the insulating partition plate is L-shaped in cross section.

[0015] Preferably, the insulating rubber plate is the insulating paper board and the rubber pad which are stacked in layers and staggered, and the insulating partition plate is made of laminated wood.

[0016] Preferably, a plurality of vertical magnetic separation groove plates are arranged in parallel on the clamping piece web of the upper clamping piece and the lower clamping piece, the cross section width of the magnetic separation groove plate is 3mm, and the height of the magnetic separation groove plate is steppedly reduced from the middle to the two sides.

[0017] The utility model discloses the beneficial effect that:

[0018] The utility model discloses low -noise extra -high voltage reactor core structure increases yoke clamping structure, increases yoke clamping force, utilizes elastic pressure structure, effectively reduces the core vibration, through the yoke bevel joint joint place increase pull screw and set up insulating rubber plate, reduce the vibration while blocking the transmission of noise, through the outside clamping screw rod and yoke between design a kind of recessed damping pad, further reduce the noise generated due to pull screw resonance. The core structure of the utility model increases a variety of shock-absorbing and noise-reducing structures, effectively blocks the transmission of noise, thereby reducing the noise of the reactor, the overall noise reduction effect is remarkable, and has wide popularization and application value. DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0020] Figure 1 It is a front view of the iron core structure of the embodiment of the present application;

[0021] Figure 2 It is a left view of the iron core structure of the embodiment of the present application;

[0022] Figure 3 It is a top view of the iron core structure of the embodiment of the present application;

[0023] Figure 4 It is an assembly schematic view of the pull screw two of the embodiment of the present application;

[0024] Figure 5 It is an assembly schematic view of the pull screw one of the embodiment of the present application;

[0025] Figure 6 It is an assembly schematic view of the insulation pad plate and the damping pad two of the embodiment of the present application;

[0026] Figure 7 It is an assembly schematic view of the damping pad one of the embodiment of the present application;

[0027] Figure 8 It is a structure schematic view of the damping pad one of the embodiment of the present application;

[0028] Figure 9 It is an assembly schematic view of the insulation rubber plate and the insulation partition plate of the embodiment of the present application;

[0029] Figure 10 It is a structure schematic view of the insulation partition plate of the embodiment of the present application;

[0030] Figure 11 It is a structure schematic view of the magnetic isolation groove plate at the web of the clamp of the embodiment of the present application;

[0031] Wherein, 1, upper clamp, 2, upper yoke, 3, iron core column, 4, upper cross beam, 5, upper pressing beam, 6, lower base foot, 7, pull screw one, 8, pull screw disc spring one, 9, pull screw two, 10, pull screw disc spring two, 11, pull screw three, 12, pull screw disc spring three, 13, insulation rubber plate, 14, insulation partition plate, 15, damping pad one, 16, side yoke, 17, pull screw four, 18, magnetic isolation groove plate, 19, lower clamp, 20, hook, 21, upper side beam, 22, insulation pad plate, 23, damping pad two, 24, yoke oblique joint seam, 25, lower yoke, 26, pull screw five, 27, pull screw six, 28, pull screw seven, 29, side clamp. Detailed Implementation

[0032] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0033] like Figures 1-11 As shown, a low-noise ultra-high voltage parallel reactor core structure includes an upper clamp 1, an upper yoke 2, a core column 3, a side clamp 29, a side yoke 16, a lower clamp 19 and a lower yoke 25, and core assembly parts, etc. The upper yoke 2, the side yoke 16 and the lower yoke 25 form a rectangular frame structure yoke. The upper yoke 2, side yoke 16, and lower yoke 25 are all made of stacked silicon steel sheets. Side clamps 29, upper clamps 1, and lower clamps 19 are fixedly installed on the front and rear sides of the side yoke 16, upper yoke 2, and lower yoke 25 by pull screws 27. The pull screws 27 pass through the side clamps 29 and side yoke 16, upper clamps 1 and upper yoke 2, lower clamps 19 and lower yoke 25, and are then tightened at both ends by nuts. The upper yoke 2, side yoke 16, and lower yoke 25 are clamped together by the pull screws 27, side clamps 29, upper clamps 1, and lower clamps 19, thus achieving horizontal clamping and fixing of the yokes. The height of the upper yoke 2 and lower yoke 25 is slightly greater than the height of the upper clamps 1 and lower clamps 19. A section of the upper yoke 2 and lower yoke 25 is exposed at the upper and lower ends of the upper clamps 1 and lower clamps 19. The width of the side clamps 29 is greater than the width of the side yoke 16.

[0034] To further improve the clamping force of the yoke and reduce noise, this embodiment of the invention also provides several pull screws 17 on both sides of the outer periphery of the yoke and several pull screws 26 at both ends of the outer periphery of the yoke. Holes are opened on the outer extension of the side clamp 29 for installing the pull screws 17, which further enhance the clamping force of the side yoke 16. A punched part 1 is welded and installed on the outer side of the upper clamp 1 and lower clamp 19, and pull screws 26 are installed on the punched part 1, further enhancing the clamping force of the upper yoke 2 and lower yoke 25. Additionally, punched parts 2 are welded to the two corners of the upper inner periphery of the yoke near the yoke's oblique joint 24, and pull screws 28 are installed on the punched parts 2. Pull screws 28 can improve the clamping force at the yoke's oblique joint 24, reducing noise caused by vibration of the yoke's oblique joint 24.

[0035] The damping pad one 15 is fixed between the side yoke 16 and the pull screw four 17, the damping pad one 15 is a long column with a rectangular cross section, a semicircular groove is formed in the length direction of the damping pad one 15 and matched with the pull screw four 17, the pull screw four 17 is sleeved in the semicircular groove, one side of the damping pad one 15 is designed as a semicircular groove structure, so that the damping pad one 15 can be conveniently installed between the side yoke 16 and the pull screw four 17, the damping pad one 15 is made of elastic material, and the side yoke 16 and the pull screw four 17 can extrude the damping pad one 15 by the thickness difference. The pull screw five 26 and the pull screw seven 28 are also provided with the damping pad one 15, and the installation position and the installation method are the same as those of the pull screw four 17. The damping pad one 15 can reduce the resonance of the pull screw four 17, and in turn reduce the noise.

[0036] The upper cross beam 4 is arranged at the position corresponding to the iron core column 3 above the upper yoke 2, and the lower cross beam is arranged at the position corresponding to the iron core column 3 below the lower yoke 25, the upper cross beam 4 and the lower cross beam are fixedly connected with the upper clamp 1 and the lower clamp 19 through bolts.

[0037] The upper cross beam 4 and the lower cross beam are fixedly connected with the upper clamp 1 and the lower clamp 19 through bolts.

[0038] The upper cross beam 4 and the lower cross beam are fixedly connected with the upper clamp 1 and the lower clamp 19 through bolts.

[0039] The iron core column 3 is composed of iron core cakes with different heights and air cushion blocks. After the iron core column 3 is assembled with the upper and lower yokes 2 and 25, it is clamped by a plurality of pull screws 7, and is elastically compressed by the pull screw disc springs 8. Even if the iron core column 3 is subjected to alternating electromagnetic force, it can still maintain the clamped state. The upper and lower clamping of the upper and lower yokes 2 and 25 also includes pull screws 9 and 11, and the upper ends of the pull screws 9 and 11 are respectively provided with pull screw disc springs 10 and 12 with elastic compression function. The upper and lower yokes and the clamping pieces are connected into a rigid whole structure, and the vibration noise caused by loosening is reduced.

[0040] The lower yoke 25 is fixedly provided with lower feet 6 at the left and right ends of the lower surface. The lower feet 6 correspond to the positions of the upper pressing beams 5, and the center positions of the lower feet 6 and the lower yoke 25 are fixedly provided with insulating pads 22 and shock-absorbing pads 23. The shock-absorbing pads 23 are adjacent to the lower feet 6, the insulating pads 22 have an insulating effect, and the shock-absorbing pads 23 fill the gaps formed by assembly, effectively reducing the noise caused by vibration. The upper pressing beams 5 and the upper cross beams 4 are also provided with insulating pads 22 and shock-absorbing pads 23.

[0041] An insulating rubber plate 13 is fixedly installed at the yoke oblique joint 24 close to the upper and lower clamping pieces 1 and 19. The insulating rubber plate 13 is L-shaped and is made of a whole plate. The insulating rubber plate 13 is made of a layer of insulating paper and a rubber pad. Binding holes are formed at the two ends of the insulating rubber plate 13, hooks 20 are welded on the side surfaces of the upper pressing beams 5, the horizontal ends of the insulating rubber plate 13 are fixedly bound to the hooks 20 through the binding holes, and the vertical ends of the insulating rubber plate 13 are fixedly bound to the pull screw 17. In order to avoid the insulating rubber plate 13 being cut by the yoke oblique joint 24, insulating partitions 14 are fixedly installed on the upper part of the upper side beam 21 and the lower part of the lower side beam. The insulating partitions 14 are L-shaped in cross section, recesses are formed on the vertical side surfaces of the insulating partitions 14, and through holes are formed on the horizontal side surfaces. The insulating partitions 14 are fixedly installed on the upper side beam 21 and the lower side beam through the through holes and bolts, and the recesses can facilitate the fastening of the bolts. The edges of the insulating partitions 14 need to be rounded, which is also to avoid the insulating rubber plate 13 being cut. By installing such structures on the upper and lower side beams of the yoke, the transmission of noise at the yoke oblique joint 24 can be further blocked. The insulating partitions 14 are made of laminated wood.

[0042] The upper clamp 1 and the lower clamp 19 are matched with clamp webs, and a plurality of vertical magnetic separation groove plates 18 are arranged in parallel on the side of the clamp webs of the upper clamp 1 and the lower clamp 19 away from the core column 3, the cross-sectional width of the magnetic separation groove plate 18 is 3mm, the width of 3mm is an optimal size obtained according to simulation verification, and meanwhile, factors such as the strength of the whole clamp web are considered, the magnetic separation groove plate 18 with the width of 3mm can ensure the magnetic separation effect, the height of the magnetic separation groove plate 18 is steppedly reduced from the middle to both sides, metal gaps are formed between the two adjacent magnetic separation groove plates 18, the metal gaps can hinder the leakage magnetic flux from entering the clamp, and local overheating of the upper clamp 1 and the lower clamp 19 is prevented.

[0043] The shock pad one 15 and the shock pad two 23 are made of nitrile rubber plates, can eliminate assembly installation gaps and reduce noise.

[0044] In the embodiments of the present application, the technical features not described in detail are prior art or conventional technical means, which will not be described here.

[0045] Finally, it should be noted that: the above examples, only for the specific embodiments of the present application, in order to illustrate the technical scheme of the present application, and not limited, the scope of protection of the present application is not limited to this. Those skilled in the art should understand: any skilled in the art within the scope of the present application, the technical range disclosed by the present application, the technical scheme recorded in the foregoing examples can be modified or easily thought of changes, or equivalent replacement of some technical features; and these modifications, changes or replacement, do not make the corresponding technical scheme of the essence of the present application deviate from the spirit and scope of the technical scheme of the present application, all should be covered in the protection scope of the present application.

Claims

1. A low-noise extra-high-voltage shunt reactor core structure comprising a core column (3), an upper cross beam (4), an upper pressing beam (5), a lower pad foot (6) and a rectangular frame structure of an iron yoke, characterized in that, Iron yoke outer periphery left and right two sides install pull screw four (17), iron yodge outer periphery upper and lower two sides install pull screw five (26), iron yodge inner periphery upper end two corners close to iron yodge oblique joint (24) position install pull screw seven (28), pull screw four (17), pull screw five (26) and pull screw seven (28) clamp iron yodge front and back two ends, pull screw four (17), pull screw five (26) and pull screw seven (28) with iron yodge between all install shock pad one (15), upper crossbeam (4), upper compression beam (5) and lower pad foot (6) with iron yodge between all install insulation pad plate (22) and shock pad two (23), iron yodge outer side close to iron yodge oblique joint (24) install L-shaped structure insulation rubber plate (13).

2. The core structure of a low-noise EHV shunt reactor according to claim 1, characterized in that, The iron yoke includes a side yoke (16), an upper iron yoke (2), and a lower iron yodge (25), the pull screw six (27) penetrates the side yoke (16) to connect the side clamp (29), penetrates the upper iron yoke (2) to connect the upper clamp (1), and penetrates the lower iron yodge (25) to connect the lower clamp (19), the height of the upper iron yoke (2) and the lower iron yodge (25) is greater than the height of the upper clamp (1) and the lower clamp (19), and the width of the side clamp (29) is greater than the width of the side yoke (16).

3. The core structure of a low-noise EHV shunt reactor according to claim 2, characterized in that, The part of the side clamp (29) extending out of the side yoke (16) is provided with a hole for installing the pull screw four (17), the outer sides of the upper clamp (1) and the lower clamp (19) are welded with punched parts one for installing the pull screw five (26), and the two corners of the upper end of the inner periphery of the iron yodge close to the iron yodge oblique joint (24) are welded with punched parts two for installing the pull screw seven (28).

4. The core structure of a low-noise EHV shunt reactor according to claim 3, characterized in that, The shock pad one (15) is a long column with a rectangular cross section, and a semicircular groove is formed in the length direction of the shock pad one (15) to cooperate with the pull screw four (17), the pull screw five (26), and the pull screw seven (28), and the shock pad one (15) is made of an elastic material.

5. The core structure of a low-noise EHV shunt reactor according to claim 1, characterized in that, An upper crossbeam (4) is arranged above the upper iron yodge (2) corresponding to the position of the iron core column (3), and a lower crossbeam is arranged below the lower iron yodge (25) corresponding to the position of the iron core column (3), the upper iron yodge (2), the upper crossbeam (4), the lower iron yodge (25), the lower crossbeam, and the iron core column (3) are provided with a plurality of circularly distributed through holes, and the pull screw one (7) is installed in the through holes.

6. The core structure of a low-noise EHV shunt reactor according to claim 5, characterized in that, The upper end of the pull screw one (7) is sleeved with the pull screw disc spring one (8), the pull screw disc spring one (8) is located between the upper crossbeam (4) and the upper iron yodge (2), and the two ends of the pull screw disc spring one (8) are provided with steel washers.

7. The core structure of a low-noise EHV shunt reactor according to claim 6, characterized in that, The upper yoke (2) is provided with upper pressing beams (5) at both ends of the upper surface, and upper side beams (21) are arranged at both sides of the upper yoke (2), and lower side beams are arranged at both sides of the lower yoke (25), and lower pads (6) are arranged at both ends of the lower surface of the lower yoke (25), the lower pads (6) are arranged at positions corresponding to the upper pressing beams (5), the upper pressing beams (5) and the lower pads (6) are connected by pull screw three (11) at both ends, the pull screw three (11) is sleeved with pull screw disc spring three (12) at the upper end, and steel washers are arranged at both ends of the pull screw disc spring three (12), the upper clamping piece (1) and the lower clamping piece (19) are provided with pull screw two (9) in the vertical direction at the ends, the pull screw two (9) is sleeved with pull screw disc spring two (10) at the upper end, and steel washers are arranged at both ends of the pull screw disc spring two (10).

8. The core structure of a low-noise EHV shunt reactor according to claim 7, characterized in that, The ends of the insulating rubber plate (13) are provided with binding holes, the upper pressing beams (5) are welded with hooks (20), the horizontal ends of the insulating rubber plate (13) are fixed by binding with the hooks (20) through the binding holes, the vertical ends of the insulating rubber plate (13) are fixed by binding with the pull screw four (17) through the binding holes, the upper side beams (21) and the lower side beams are provided with insulating partitions (14) at the upper part and the lower part, and the cross section of the insulating partitions (14) is L-shaped.

9. The core structure of a low-noise EHV shunt reactor according to claim 8, characterized in that, The insulating rubber plate (13) is an insulating paper board and a rubber pad which are stacked in layers and staggered, and the material of the insulating partition (14) is laminated wood.

10. A core structure of a low-noise EHV shunt reactor according to any one of claims 2-4, characterized in that, The upper clamping piece (1) and the lower clamping piece (19) are provided with a plurality of vertical magnetic separation groove plates (18) which are arranged in parallel on the clamping piece web plate, the cross section width of the magnetic separation groove plate (18) is 3mm, and the height of the magnetic separation groove plate (18) is steppedly reduced from the middle to both sides.

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