CN217468160U - Novel saturable reactor for high-voltage direct-current transmission - Google Patents
Novel saturable reactor for high-voltage direct-current transmission Download PDFInfo
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- CN217468160U CN217468160U CN202221337255.3U CN202221337255U CN217468160U CN 217468160 U CN217468160 U CN 217468160U CN 202221337255 U CN202221337255 U CN 202221337255U CN 217468160 U CN217468160 U CN 217468160U
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Abstract
A novel saturable reactor for high-voltage direct-current transmission is characterized in that a coil is wound by a copper bar or an aluminum bar and is arranged in bilateral symmetry, and a connecting terminal is connected to a wire outlet end of the coil; casting and molding the coil by using high-thermal-conductivity epoxy resin through a molding die in a vacuum state; installing the water nozzle at the position of a waterway outlet of the radiator, symmetrically installing the iron cores at the inner sides of the coils, placing the radiator between the two pairs of iron cores, firmly fastening the iron cores and the radiator by using the iron core locking block, and installing the iron cores and the radiator into the lower shell; the upper shell and the lower shell are sealed and fastened, polyurethane filler is injected to fill the cavity in the shell, and all the components in the shell are solidified to form a whole; the utility model discloses increasing the coil number of turns and reaching the purpose that reduces the iron core, the weight and the volume of reactor reduce thereupon and cancel the coil water route and increase iron core radiator water route, and the temperature field distributes rationally and reduces the leakage probability, and the inside polyurethane material that adopts of casing fills, has effectively reduced the noise, has the practical efficient advantage of small light in weight.
Description
Technical Field
The utility model belongs to the technical field of the high voltage transmission and transformation, especially, relate to a novel saturable reactor for high voltage direct current transmission.
Background
The saturable reactor is a core device in the converter valve and is used for inhibiting the current rise rate of the valve which is too fast when the valve is opened, so that the thyristor is protected from being damaged when being safely opened. In order to ensure reliable trigger conduction of the thyristor, the off-state voltage conversion rate (du/dt) and the on-state current conversion rate (di/dt) are reduced so as to meet the reliability requirement of the thyristor and the safety and stability of the converter valve.
The saturable reactor determines electrical performance parameters, thermal performance parameters, fire resistance, shock resistance and the like according to the use requirements and characteristics of the converter valve, and in addition, the convenience and economic characteristics of installation are also considered. In general, the coil of the saturable reactor is water-cooled, and the iron core is water-cooled or self-cooled, but the saturable reactor adopting the form is not economical under the condition of relatively small system current, and has larger volume and weight.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a novel saturable reactor for high-voltage direct-current transmission, which can optimize electromagnetic calculation, change a single coil into a double-coil structure, and achieve the purpose of reducing an iron core by increasing the number of turns of the coil, thereby reducing the weight of a product; the optimized heat dissipation design ensures that the temperature field is uniformly distributed, and has the advantages of small volume, light weight, low noise, practicability and high efficiency.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a novel saturable reactor for high voltage direct current transmission, coil 7 including bilateral symmetry setting, the leading-out terminal of coil 7 is connected with binding post 4, with epoxy resin 3 with coil 7 casting moulding under vacuum state, 7 inboard symmetries of both sides coil are equipped with iron core 10, radiator 8 has been placed to the centre of both sides iron core 10, radiator 8 passes through iron core latch segment 9 zonulae occludens with iron core 10 and places in casing 6 down, seal installation has last casing 2 on the casing 6 down, it has polyurethane filler 5 to pour into in casing 6 and the last casing 2 after the seal installation into, be full of casing 6 and last casing 2 inner cavity down, inside all parts become a whole after the solidification.
The radiator 8 adopts the water-cooling radiator, and the water route export of radiator 8 is equipped with water injection well choke 1.
The coil 7 is made of copper bars or aluminum bars by winding.
The iron core 10 is wound by a high-permeability ultrathin oriented cold-rolled silicon steel sheet.
The iron core 10 is a C-shaped iron core.
And the lower shell 6 and the upper shell 2 are formed by SMC compression molding.
Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model takes the requirements of surge current bearing capacity, long-term through-current capacity, temperature rise, insulation and the like of the reactor into consideration, optimizes electromagnetic design and structural design, and selects materials with proper performance; the water path of the coil 7 is eliminated, and the single-coil structure is changed into a double-coil structure, so that the number of turns of the coil 7 is increased to reduce the number of the iron cores 10, and the temperature rise is not more than required after the water path of the coil 7 is eliminated; the iron cores 10 which are symmetrically arranged are wound by high-permeability ultrathin oriented cold-rolled silicon steel sheets, a water-cooled radiator is laid between the two iron cores, and heat generated by the iron cores 10 is taken away through a water path.
Through the optimized electromagnetic design and the optimized structural design, the water paths of the coil 7 are eliminated, the water paths of the iron core 10 radiator are increased, the water path structure is simplified, the number of joints is reduced, and therefore the leakage probability is reduced. A single coil is changed into a left and right double-coil structure, the number of turns of the coil 7 is increased to achieve the purpose of reducing the iron core 10, the weight and the volume of the reactor can be reduced accordingly, and the utilization rate of the iron core 10 is higher due to the assembly mode of the iron core 10 and the coil 7. The temperature field design is optimized, so that the temperature field distribution is more reasonable. The shell adopts high strength SMC compression molding, and inside adopts the polyurethane material to fill, has effectively reduced the noise to small light in weight.
Drawings
Fig. 1 is a plan view of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a front view of the present invention.
In the figure: 1. a water nozzle; 2. an upper housing; 3. high thermal conductivity epoxy resin; 4. a wiring terminal; 5. a polyurethane filler; 6. a lower housing; 7. a coil; 8. a heat sink; 9. an iron core locking block; 10. and (3) an iron core.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 3, a novel saturable reactor for high-voltage direct-current transmission, coil 7 including bilateral symmetry sets up, the leading-out terminal of coil 7 is connected with binding post 4, cast molding coil 7 with epoxy 3 under vacuum state, 7 inboard symmetries of both sides coil are equipped with iron core 10, radiator 8 has been placed to the centre of both sides iron core 10, radiator 8 and iron core 10 pass through iron core latch segment 9 zonulae occludens and place in lower casing 6, seal installation has upper housing 2 on lower casing 6, the polyurethane filler 5 has been injected into in lower casing 6 after the seal installation and the upper housing 2, be full of lower casing 6 and the interior cavity of upper housing 2, inside all parts become a whole after the solidification.
The radiator 8 adopts the water-cooling radiator, and the water route export of radiator 8 is equipped with water injection well choke 1.
The coil 7 is made of copper bars or aluminum bars by winding.
The iron core 10 is wound by a high-permeability ultrathin oriented cold-rolled silicon steel sheet.
The iron core 10 is a C-shaped iron core.
And the lower shell 6 and the upper shell 2 are formed by SMC compression molding.
The utility model discloses the principle does:
winding a copper bar or an aluminum bar into a coil 7, symmetrically arranging the coil 7 left and right, and welding the wiring terminals 4 at the wire outlet ends of the coil 7; casting and molding 7 the coil 7 by using high-thermal-conductivity epoxy resin 3 through a molding die in a vacuum state; welding the water nozzle 1 at the position of a waterway outlet of a radiator 8, arranging symmetrically arranged iron cores 10 at the inner side of a coil 7, placing the radiator 8 between two pairs of iron cores 10, firmly fastening the iron cores 10 and the radiator 8 by using an iron core locking block 9, and loading the iron cores 10 and the radiator 8 into a lower shell 6; after the positions of all the components in the lower shell 6 are adjusted, the upper shell 2 is buckled and sealed and fastened, polyurethane filler 5 is injected to fill the cavity in the shell, and all the components in the shell are solidified to form a whole; the product structure is optimized, the volume is small, and the weight is light.
Claims (6)
1. The utility model provides a novel saturable reactor for high voltage direct current transmission, includes coil (7) that bilateral symmetry set up, its characterized in that: the leading-out terminal of coil (7) is connected with binding post (4), with epoxy (3) casting molding of coil (7) under vacuum state, both sides coil (7) inboard symmetry is equipped with iron core (10), radiator (8) have been placed to the centre of both sides iron core (10), radiator (8) and iron core (10) are through iron core latch segment (9) zonulae occludens and place in casing (6) down, sealed mounting has last casing (2) on casing (6) down, it has polyurethane filler (5) to pour into in casing (6) and last casing (2) after the sealed mounting, be full of casing (6) and last casing (2) inner cavity down, inside all parts become a whole after the solidification.
2. The novel saturable reactor for high-voltage direct current transmission according to claim 1, characterized in that: the radiator (8) adopts a water-cooling radiator, and a water nozzle (1) is arranged at a water channel outlet of the radiator (8).
3. The novel saturable reactor for high-voltage direct current transmission according to claim 1, characterized in that: the coil (7) is made of copper bars or aluminum bars in a winding mode.
4. The novel saturable reactor for high-voltage direct current transmission according to claim 1, characterized in that: the iron core (10) is wound by adopting a high-permeability ultrathin oriented cold-rolled silicon steel sheet.
5. A novel saturable reactor for high-voltage direct current transmission according to claim 1 or 4, characterized in that: the iron core (10) is of a C-shaped structure.
6. The novel saturable reactor for high-voltage direct current transmission according to claim 1, characterized in that: the lower shell (6) and the upper shell (2) are formed by SMC compression molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221337255.3U CN217468160U (en) | 2022-05-31 | 2022-05-31 | Novel saturable reactor for high-voltage direct-current transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221337255.3U CN217468160U (en) | 2022-05-31 | 2022-05-31 | Novel saturable reactor for high-voltage direct-current transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217468160U true CN217468160U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221337255.3U Active CN217468160U (en) | 2022-05-31 | 2022-05-31 | Novel saturable reactor for high-voltage direct-current transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217468160U (en) |
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2022
- 2022-05-31 CN CN202221337255.3U patent/CN217468160U/en active Active
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