CN112908644A - Novel double-magnetic-circuit high-impedance controllable reactor - Google Patents
Novel double-magnetic-circuit high-impedance controllable reactor Download PDFInfo
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- CN112908644A CN112908644A CN202110085963.6A CN202110085963A CN112908644A CN 112908644 A CN112908644 A CN 112908644A CN 202110085963 A CN202110085963 A CN 202110085963A CN 112908644 A CN112908644 A CN 112908644A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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Abstract
The invention discloses a novel double-magnetic-circuit high-impedance controllable reactor, which overcomes the problems of complex structure, low reliability and long response time of products in the prior art. The invention receives leakage flux between the high-voltage coil and the low-voltage coil to form a double-magnetic-circuit iron core, so that the leakage flux generated when the low-voltage coil is in short circuit forms a closed magnetic circuit through the bypass auxiliary iron core, the product loss can be greatly reduced while the short-circuit high impedance rate is close to 100%, the output inductance and reactance of the controllable reactor can be smoothly adjusted by controlling the current of the low-voltage coil, the response speed is greatly improved, the response time of the body and the transformer is synchronous, the operation reliability of the product is greatly improved, the maintenance of a user is simple and convenient, and the problems of system voltage and reactive power balance of a power.
Description
Technical Field
The invention relates to the technical field of reactors, in particular to a novel double-magnetic-circuit high-impedance controllable reactor.
Background
With the development of new energy and the continuous expansion of the scale of a power grid, an overhead power transmission line is gradually replaced by an underground power transmission cable, so that the capacitive charging current of a power transmission network to the ground is increased rapidly, and the controllable reactor is applied more and more widely to ensure the safe and reliable operation of a power supply system and the power supply quality of a city power grid. The controllable reactor can be connected in parallel or in series on the system and is used for compensating the capacitance current of the long-distance transmission line, filtering the harmonic current of the system and the like. The traditional controllable reactor has a turn-adjusting type, an air gap adjusting type and the like, and in recent years, a magnetic valve type controllable reactor is widely applied, the structure of the magnetic valve type controllable reactor is mainly characterized in that an iron core with a gap and an iron core without the gap are arranged in a staggered mode, and continuous stepless adjustment of a reactance value is achieved by adjusting the magnitude of direct current of a tap part. However, the iron core with the structure has a complex processing technology, the reactance value is adjusted at a high-voltage side, and in addition, the overall response time of the product is longer due to the adoption of a direct-current magnetic assistance principle, so that the load change cannot be tracked in real time. Although the response time of the quick response magnetic valve type controllable reactor is improved, the product of the technical type is realized by adopting complex power electronic devices, so that the cost is high, the structure is complex, and the reliability is low.
Disclosure of Invention
The invention provides a novel double-magnetic-circuit high-impedance controllable reactor, aiming at overcoming the problems of complex product structure, low reliability and long response time in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a novel controllable reactor of double magnetic circuit high impedance formula, includes iron core, vice iron core, high-pressure coil and low-voltage coil for the vice iron core setting of absorption magnetic leakage is between low-voltage coil and high-pressure coil, and the low-voltage coil setting is in the iron core outside, and the high-pressure coil setting is in the low-voltage coil outside.
The auxiliary iron core of the invention enables leakage flux generated when the low-voltage coil is in short circuit to form a closed magnetic circuit through the bypass auxiliary iron core, thereby realizing that the short circuit high impedance rate is close to or reaches 100 percent, simultaneously greatly reducing the product loss, smoothly adjusting the output inductance and reactance of the controllable reactor by controlling the current of the low-voltage coil, greatly improving the response speed, synchronizing the response time of the body and the transformer, greatly improving the operation reliability of the product, and being simple and convenient for user maintenance.
Preferably, the low-voltage coil and the high-voltage coil are respectively sleeved on the same iron core according to 50% turn winding coils, the two columns of 50% turn high-voltage coils are connected in series and connected with a power grid, and the impedance rate is 100% when the two columns of low-voltage coils are connected in series and are in short circuit. At the moment, the high-voltage coil outputs the maximum capacity, the high-voltage coil can be smoothly adjusted to output inductive reactive current by controlling the current of the low-voltage coil, and the output inductance and reactance of the novel dual-magnetic-circuit high-impedance controllable reactor can be smoothly adjusted.
Preferably, the high-voltage coil further comprises a side column iron core, and the side column iron core is arranged outside the high-voltage coil.
Preferably, the three-phase controllable reactor is included, and the arrangement mode of the three-phase controllable reactor is the same.
Preferably, the arrangement mode comprises an iron core, a low-voltage coil, an auxiliary iron core and a high-voltage coil from inside to outside in sequence, the wiring mode of the high-voltage coil comprises a triangular wiring and a star-shaped wiring, and the wiring mode of the low-voltage coil comprises a star-shaped wiring with a neutral point and a triangular wiring.
Preferably, the high-voltage coil and the low-voltage coil are of split structures.
Preferably, the secondary cores are arranged in a circumference mode and are subjected to epoxy casting and curing.
Therefore, the invention has the following beneficial effects: the invention forms a double magnetic circuit iron core by adding the auxiliary iron core and receiving leakage flux between the high-voltage coil and the low-voltage coil, so that leakage flux generated when the low-voltage coil is in short circuit forms a closed magnetic circuit through the bypass auxiliary iron core, the product loss can be greatly reduced while the short-circuit high impedance rate is close to or reaches 100 percent, the output inductance and reactance of the controllable reactor can be smoothly adjusted by controlling the current of the low-voltage coil, the response speed is greatly improved, the response time of the body and the transformer is synchronous, the operation reliability of the product is greatly improved, the user maintenance is simple and convenient, and the dynamic reactive power compensation device is combined with a capacitor in an electric power system or a mine site to form a dynamic reactive power compensation device, and the problem of reactive power.
Drawings
FIG. 1 is a schematic structural view of example 1.
FIG. 2 is a schematic structural view of example 2.
FIG. 3 is a schematic structural view of embodiment 3.
FIG. 4 is a schematic structural view of example 4.
In the figure: 1. iron core 2, vice iron core 3, high-voltage coil 4, low-voltage coil 5, side post iron core.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
Example 1:
this embodiment provides a novel controllable reactor of double magnetic circuit high impedance formula, and the reactor is single-phase two post structures, as shown in fig. 1, including iron core 1, vice iron core 2, high-voltage coil 3 and low-voltage coil 4, iron core 1 is the cylinder, and every post of high-voltage coil 3 and low-voltage coil 4 is according to 50% circle winding coil suit respectively on same iron core 1, and low-voltage coil 4 is close to iron core 1 side, and high-voltage coil 3 is in the low-voltage coil 4 outside, and vice iron core 2 arranges between low-voltage coil 4 and high-voltage coil 3.
Two columns of 50% turns of high-voltage coil 3 are connected in series, after the power grid is connected, the impedance ratio can reach 100% when two low-voltage coils 4 are connected in series and are in short circuit, at the moment, the high-voltage coil outputs the maximum capacity, the high-voltage coil can be smoothly adjusted to output inductive reactive current by controlling the current of the low-voltage coil, and the output inductance and reactance of the novel double-magnetic-circuit high-impedance controllable reactor can be smoothly adjusted.
Example 2:
this embodiment provides a novel controllable reactor of double magnetic circuit high impedance formula, as shown in fig. 2, for single-phase three-column structure, including iron core 1, vice iron core 2, high-voltage coil 3, low-voltage coil 4 and side column iron core 5, high-voltage coil 3 and the 4 coiling suit of low-voltage coil are on same iron core 1, and low-voltage coil 4 cover is established outside iron core 1, and high-voltage coil 3 is in the low-voltage coil 4 outside, and vice iron core 2 arranges between low-voltage coil 4 and high-voltage coil 3, and side column iron core 5 sets up in the 3 outsides of high-voltage coil.
After the high-voltage coil 3 is connected to a power grid, the impedance rate of the low-voltage coil 4 can be close to or reach 100% when in short circuit, the high-voltage coil outputs the maximum capacity at the moment, the high-voltage coil can be smoothly adjusted to output inductive reactive current by controlling the current of the low-voltage coil, and the output inductance and reactance of the novel dual-magnetic-circuit high-impedance controllable reactor can be smoothly adjusted.
Example 3:
this embodiment provides a novel controllable reactor of double magnetic circuit high impedance formula, as shown in fig. 3, this embodiment reactor is the three-phase, including iron core 1, vice iron core 2, high-voltage coil 3 and low-voltage coil 4, and the three-phase arrangement mode is the same, and one of them looks arrangement mode is: the iron core 1, the low-voltage coil 4, the auxiliary iron core 2 and the high-voltage coil 3 are arranged from inside to outside in sequence.
The high-voltage coil of the novel double-magnetic-circuit high-impedance three-phase controllable reactor is generally connected in a triangular connection mode or a star connection mode; the low-voltage coil is generally connected in a star connection with a neutral point or in a delta connection.
After the high-voltage coil 3 is connected to a power grid, the impedance rate of the low-voltage coil 4 can be close to or reach 100% when in short circuit, the high-voltage coil outputs the maximum capacity at the moment, the high-voltage coil can be smoothly adjusted to output inductive reactive current by controlling the current of the low-voltage coil, and the output inductance and reactance of the novel dual-magnetic-circuit high-impedance controllable reactor can be smoothly adjusted.
Example 4:
the embodiment provides a novel double-magnetic-circuit high-impedance controllable reactor, as shown in fig. 4, the whole reactor adopts a compact layout, the innermost side is an iron core 1, the side close to the iron core 1 is a low-voltage coil 4, the outermost side is a high-voltage coil 3, the middle of the low-voltage coil 4 and the high-voltage coil 3 is an auxiliary iron core 2 which is circumferentially arranged and is subjected to epoxy pouring and curing, the short-circuit high impedance of the low-voltage coil 4 and the high-voltage coil 3 is realized through the bypass magnetic flux of the auxiliary iron core 2, and the impedance rate can be close to or reach 100.
The above embodiments are described in detail for the purpose of further illustrating the present invention and should not be construed as limiting the scope of the present invention, and the skilled engineer can make insubstantial modifications and variations of the present invention based on the above disclosure.
Claims (7)
1. The utility model provides a novel controllable reactor of double magnetic circuit high impedance formula, characterized by, including iron core (1), vice iron core (2), high-voltage coil (3) and low-voltage coil (4) for the vice iron core (2) setting of absorption magnetic leakage is between low-voltage coil (4) and high-voltage coil (3), and low-voltage coil (4) set up in the iron core (1) outside, and high-voltage coil (3) set up in the low-voltage coil (4) outside.
2. A novel double-magnetic-circuit high-impedance controllable reactor as claimed in claim 1, characterized in that the low-voltage coil (4) and the high-voltage coil (3) are respectively wound by 50% turns and sleeved on the same iron core (1), the two columns of high-voltage coils (3) with 50% turns are connected in series and connected with the power grid, and the impedance ratio of the two columns of low-voltage coils (4) in series connection is 100% when in short circuit.
3. A novel double-magnetic-circuit high-impedance controllable reactor as claimed in claim 1, characterized by further comprising a side pillar iron core (5), wherein the side pillar iron core (5) is arranged outside the high-voltage coil (3).
4. The novel double-magnetic-circuit high-impedance controllable reactor as claimed in claim 1, which comprises a three-phase controllable reactor, wherein the three-phase arrangement mode of the three-phase controllable reactor is the same.
5. A novel double-magnetic-circuit high-impedance controllable reactor as claimed in claim 4, wherein the arrangement mode comprises an iron core (1), a low-voltage coil (4), an auxiliary iron core (2) and a high-voltage coil (3) from inside to outside in sequence, the connection mode of the high-voltage coil (3) comprises a triangular connection and a star connection, and the connection mode of the low-voltage coil (4) comprises a star connection with a neutral point and a triangular connection.
6. A novel dual magnetic circuit high impedance type controllable reactor as claimed in claim 5, characterized in that, the high voltage coil (3) and the low voltage coil (4) are of split structure.
7. A novel dual-magnetic-circuit high-impedance controllable reactor as claimed in any one of claims 1 or 5, characterized in that said secondary cores (2) are arranged circumferentially and cured by epoxy casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110085963.6A CN112908644A (en) | 2021-01-22 | 2021-01-22 | Novel double-magnetic-circuit high-impedance controllable reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110085963.6A CN112908644A (en) | 2021-01-22 | 2021-01-22 | Novel double-magnetic-circuit high-impedance controllable reactor |
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| CN112908644A true CN112908644A (en) | 2021-06-04 |
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| CN202110085963.6A Pending CN112908644A (en) | 2021-01-22 | 2021-01-22 | Novel double-magnetic-circuit high-impedance controllable reactor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097810A (en) * | 2010-12-24 | 2011-06-15 | 郑州赛金电气有限公司 | Magnetic valve type magnetically controlled reactor (MCR) |
| CN203931738U (en) * | 2014-05-06 | 2014-11-05 | 深圳市铂科磁材有限公司 | A kind of EI type three-phase reactor |
| CN104835637A (en) * | 2015-04-08 | 2015-08-12 | 鞍山罗恩伏特科技有限公司 | Magnetic shunt type total magnetic flux leakage recycling coaxial duplex winding impedance-controllable electric reactor |
| US20190019611A1 (en) * | 2017-07-12 | 2019-01-17 | Fanuc Corporation | Three-phase reactor |
| CN112018781A (en) * | 2020-09-11 | 2020-12-01 | 浙江广天电力设备股份有限公司 | Intelligent transformer type controllable reactor |
| CN212084824U (en) * | 2020-07-09 | 2020-12-04 | 青岛安齐电气有限公司 | Magnetic integration high-impedance transformer type reactor |
-
2021
- 2021-01-22 CN CN202110085963.6A patent/CN112908644A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097810A (en) * | 2010-12-24 | 2011-06-15 | 郑州赛金电气有限公司 | Magnetic valve type magnetically controlled reactor (MCR) |
| CN203931738U (en) * | 2014-05-06 | 2014-11-05 | 深圳市铂科磁材有限公司 | A kind of EI type three-phase reactor |
| CN104835637A (en) * | 2015-04-08 | 2015-08-12 | 鞍山罗恩伏特科技有限公司 | Magnetic shunt type total magnetic flux leakage recycling coaxial duplex winding impedance-controllable electric reactor |
| US20190019611A1 (en) * | 2017-07-12 | 2019-01-17 | Fanuc Corporation | Three-phase reactor |
| CN212084824U (en) * | 2020-07-09 | 2020-12-04 | 青岛安齐电气有限公司 | Magnetic integration high-impedance transformer type reactor |
| CN112018781A (en) * | 2020-09-11 | 2020-12-01 | 浙江广天电力设备股份有限公司 | Intelligent transformer type controllable reactor |
Non-Patent Citations (1)
| Title |
|---|
| 方瑜: "《配电网过电压》", 31 October 1994, pages: 138 * |
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Application publication date: 20210604 |