CN115985655B - Voltage and phase regulating transformer for power distribution network - Google Patents
Voltage and phase regulating transformer for power distribution network Download PDFInfo
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- CN115985655B CN115985655B CN202310250050.4A CN202310250050A CN115985655B CN 115985655 B CN115985655 B CN 115985655B CN 202310250050 A CN202310250050 A CN 202310250050A CN 115985655 B CN115985655 B CN 115985655B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a voltage and phase regulating transformer of a power distribution network. The voltage and phase regulating transformer for the power distribution network belongs to the technical field of transformers; the voltage and phase regulating transformer of the power distribution network comprises an iron core, a first phase regulating switch, a second phase regulating switch, a voltage regulating switch, a reactor coil, an oil tank, a sleeve and an integrated voltage and current transformer, wherein the iron core consists of an iron core column and an iron yoke; and meanwhile, the information of the amplitude and the phase angle of the two sides voltage and the magnitude of the load current, which are acquired by the source side and the load side integrated voltage-current transformer, is uploaded to an automatic control device, and the automatic device automatically adjusts the voltage and the phase angle according to the set information so as to optimize the system operation.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a voltage and phase regulating transformer for a power distribution network.
Background
With the continuous development of the power grid technology, the connection between networks is also becoming widespread. And the power flow distribution among the power distribution networks is regulated, and the connection among different power grids is wider. For two power distribution networks with the same voltage class, due to different loads, the voltage amplitude has certain deviation, the phase angle of the voltage between the first and second power distribution networks also has certain deviation, and the two power distribution networks cannot be directly connected. In order to achieve connection of two distribution networks of the same voltage class, transformers capable of regulating voltage and phase are required. At present, in a power distribution network, a transformer technology capable of simultaneously regulating voltage and phase and regulating power flow distribution of two power distribution networks belongs to a blank area, and the invention aims to fill the blank.
According to the method, the device and the system, the influence and the requirement of the deviation of the voltage amplitude and the phase angle between the two power distribution networks on the transformer are met through analysis of the power flow distribution between the power distribution networks, judgment is made through signal acquisition of the voltage amplitude deviation and the voltage phase angle between the power distribution networks, and then the transformer makes corresponding voltage amplitude adjustment and phase adjustment according to the instruction so as to compensate the voltage amplitude deviation and the phase angle deviation between the two power distribution networks, so that the power flow distribution in the power distribution networks is effectively controlled and regulated, and the power distribution network resources are fully utilized.
Disclosure of Invention
The invention aims to solve the problems and provide the voltage and phase regulating transformer of the power distribution network, which has a simple structure and reasonable design.
The invention realizes the above purpose through the following technical scheme:
the utility model provides a distribution network voltage regulation phase modulation transformer, includes iron core, first phase modulation switch, second phase modulation switch, voltage regulation switch, reactor coil, oil tank, sleeve pipe and integrated voltage current transformer that comprise iron core post and yoke, the cover is excitation winding, first phase modulation winding, second phase modulation winding and voltage regulation winding in the iron core outside, first phase modulation switch, second phase modulation switch and voltage regulation switch realize the parallel operation between two distribution networks.
As a further optimization scheme of the invention, the head ends of the first phase modulation winding and the second phase modulation winding are connected with the head end of the exciting winding.
As a further optimization scheme of the invention, the integrated voltage-current transformer is arranged on a source side and a load side of a transformer in the power distribution network, and is used for collecting and automatically controlling voltage amplitude, phase and load current.
As a further optimized scheme of the invention, the air core reactor is connected in series with the inlet side of the transformer in the power distribution network.
As a further optimization scheme of the invention, the first power grid and the second power grid in the distribution network can achieve phase and voltage linkage through the adjustment of the first phase modulation switch, the second phase modulation switch and the voltage regulation switch, so that a closed loop network is formed.
As a further optimization of the invention, the reactor coils are connected in series on the inlet side of the transformer in the power distribution network.
As a further optimization scheme of the invention, the oil tank is used for accommodating the iron core, the exciting winding sleeved outside the iron core column, the first phase modulation winding, the second phase modulation winding and the voltage regulation winding.
As a further optimization scheme of the invention, the sleeve leads the leads of the exciting winding, the first phase modulation winding, the second phase modulation winding and the voltage regulation winding to the outside of the oil tank respectively.
As a further optimization scheme of the invention, the sleeve comprises a hard pipeline, a first limiting ring and a second limiting ring, wherein a rubber insulating sleeve is fixedly arranged at the inner ring of the hard pipeline, a cavity is formed between the outer ring of the rubber insulating sleeve and the inner ring of the hard pipeline, and hydraulic oil is filled in the cavity.
As a further optimization scheme of the invention, the first limiting ring is integrally arranged at one end of the hard pipeline, the second limiting ring is detachably arranged at the other end of the hard pipeline, the hard pipeline passes through a reserved hole on the oil tank, the second limiting ring is attached to the inner wall of the oil tank, the first limiting ring is attached to the outer wall of the oil tank, one end, close to the hard pipeline, of the second limiting ring is integrally provided with the connecting ring, the connecting ring is connected to the outer ring of the hard pipeline through threaded fit, one surface, far away from the hard pipeline, of the first limiting ring is provided with the annular groove, the side wall of the annular groove is provided with the adding pipe, and the bottom of the annular groove is also provided with the adding channel communicated between the cavity and the adding pipe.
The invention has the beneficial effects that: the invention is composed of an excitation winding, a phase modulation winding and a voltage regulation winding, and by arranging the voltage regulation winding and the phase modulation winding, two power distribution networks with deviation of voltage amplitude and deviation of phase angle can be connected together to realize grid-connected operation; and meanwhile, the information of the amplitude and the phase angle of the two sides voltage and the magnitude of the load current, which are acquired by the source side and the load side integrated voltage-current transformer, is uploaded to an automatic control device, and the automatic device automatically adjusts the voltage and the phase angle according to the set information so as to optimize the system operation. Meanwhile, aiming at the situation that the short circuit to the ground occurs frequently in the power distribution network, the air core reactor is connected in series with the inlet side of the transformer, so that the short circuit impedance of the transformer is improved, and the short circuit resistance of the transformer is improved.
The matched sleeve solves the problems that the sleeve is easy to damage due to overvoltage and heavy current and the service life of the sleeve is reduced, and improves the capability of the sleeve for bearing the working voltage and load current for a long time and the short-time overvoltage and heavy current in faults.
Drawings
FIG. 1 is a top view of a voltage and phase regulating transformer of the power distribution network of the present invention;
FIG. 2 is a side view of a voltage and phase regulating transformer of the power distribution network of the present invention;
FIG. 3 is a wiring diagram of a voltage and phase regulating transformer of the power distribution network of the present invention;
FIG. 4 is a schematic diagram of a hard pipe structure according to the present invention;
FIG. 5 is a schematic view of the internal structure of the hard pipeline according to the present invention;
FIG. 6 is a schematic view of the structure of the hard pipe connected to the oil tank according to the present invention;
FIG. 7 is an enlarged schematic view of the structure A in FIG. 5 according to the present invention;
fig. 8 is an enlarged schematic view of the structure B in fig. 6 according to the present invention.
In the figure: the transformer comprises an iron core 1, an excitation winding 2, a first phase modulation winding 3, a second phase modulation winding 4, a voltage regulation winding 5, a first phase modulation switch 6, a second phase modulation switch 7, a voltage regulation switch 8, a reactor coil 9, an oil tank 10, a sleeve 11, an integrated voltage-current transformer 12, a hard pipeline 13, a first limiting ring 14, a second limiting ring 15, a rubber insulating sleeve 16, a cavity 17, a connecting ring 18, an adding pipe 19, an adding channel 20 and an annular groove 21.
Detailed Description
The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the following detailed description is merely illustrative of the application and is not to be construed as limiting the scope of the application, since numerous insubstantial modifications and adaptations of the application will be to those skilled in the art in light of the foregoing disclosure.
Example 1
As shown in fig. 1 to 8, a voltage-regulating phase-modulating transformer for a power distribution network comprises an iron core 1, a first phase-modulating switch 6, a second phase-modulating switch 7, a voltage-regulating switch 8, a reactor coil 9, an oil tank 10, a sleeve 11 and an integrated voltage-current transformer 12, wherein an excitation winding 2, a first phase-modulating winding 3, a second phase-modulating winding 4 and a voltage-regulating winding 5 are sleeved outside the iron core 1, and the first phase-modulating switch 6, the second phase-modulating switch 7 and the voltage-regulating switch 8 realize parallel operation between two power distribution networks.
Conventional transformers are generally composed of a high voltage winding and a low voltage winding, and three-winding transformers are composed of a high voltage winding, a medium voltage winding and a low voltage winding. For on-load voltage regulating transformers, separate voltage regulating windings may be added.
The invention relates to a transformer for voltage regulation and phase modulation of a power distribution network, which consists of an excitation winding 2, a phase modulation winding (a first phase modulation winding 3 and a second phase modulation winding 4) and a voltage regulation winding 5, wherein the voltage regulation winding 5 and the phase modulation winding are arranged to enable the power distribution network with two voltage amplitude deviation and phase angle deviation to be connected together, so that grid-connected operation is realized.
Meanwhile, information of the amplitude and the phase angle of the voltage at two sides and the magnitude of the load current, which are acquired by the transformer source side and the load side integrated voltage-current transformer 12 in the power distribution network, is uploaded to an automatic control device, and the automatic device automatically adjusts the voltage and the phase angle according to the set information so as to optimize the system operation.
Meanwhile, aiming at the situation that the short circuit to the ground occurs frequently in the power distribution network, the air core reactor is connected in series with the inlet side of the transformer, so that the short circuit impedance of the transformer is improved, and the short circuit resistance of the transformer is improved.
The specific implementation scheme is as follows:
the outer side of the iron core 1 is sleeved with an excitation winding 2, a first phase modulation winding 3, a second phase modulation winding 4 and a voltage regulation winding 5; the head ends of the first phase modulation winding 3 and the second phase modulation winding 4 are connected with the head end of the exciting winding 2; .
When the phase of the first power grid is advanced by an angle relative to the second power grid, the first phase modulation switch 6 is adjusted to the corresponding gear, and the second phase modulation switch 7 is adjusted to the 1 st gear; when the phase of the first power grid lags behind the phase of the second power grid by an angle, the first phase modulation switch 6 is adjusted to the 1 st gear, and the second phase modulation switch 7 is adjusted to the corresponding gear; when the voltage of the first power grid is not equal to the voltage of the second power grid, the voltage regulating switch 8 is regulated to a corresponding gear;
the first power grid and the second power grid can achieve phase and voltage linkage through adjustment of the first phase modulation switch 6, the second phase modulation switch 7 and the voltage regulation switch 8, and a closed loop network is formed.
The reactor coil 9 is connected in series at the inlet side of the transformer, no matter what working state the first phase modulation winding 3, the second phase modulation winding 4 and the voltage regulation winding 5 are, the overall short-circuit impedance of the transformer can be improved, the sleeve 11 leads the leads of the exciting winding 2, the first phase modulation winding 3, the second phase modulation winding 4 and the voltage regulation winding 5 to the outside of the oil tank 10 respectively, and the oil tank 10 is used for accommodating the iron core 1, the exciting winding 2, the first phase modulation winding 3, the second phase modulation winding 4 and the voltage regulation winding 5 sleeved outside the iron core column.
Since the bushing 11 needs to bear the effects of working voltage and load current and short-time overvoltage and heavy current occurring in faults for a long time during the operation of the transformer, the bushing 11 is correspondingly improved, and the bushing 11 is specifically as follows:
the sleeve 11 comprises a hard pipeline 13, a first limiting ring 14 and a second limiting ring 15, a rubber insulating sleeve 16 is fixedly arranged at the inner ring of the hard pipeline 13, a cavity 17 is formed between the outer ring of the rubber insulating sleeve 16 and the inner ring of the hard pipeline 13, and hydraulic oil is filled in the cavity 17.
The rubber insulation sleeve 16 is arranged on the inner ring of the hard pipeline 13, the rubber insulation sleeve 16 can elastically deform to a certain extent, the problem that the sleeve 11 cannot deform in a large range due to heating when overvoltage and heavy current occur is solved, and when the sleeve 11 is severely heated, the rubber insulation sleeve 16 replaces the sleeve 11 to expand and deform due to heating due to the strong elastic deformation capability of the rubber insulation sleeve 16, so that the sleeve is suitable for passing of overvoltage and heavy current; the cavity 17 is filled with hydraulic oil, so that the sleeve 11 can be cooled when being heated, and a certain cooling protection effect is achieved; meanwhile, the rubber insulation sleeve 16 tends to be deformed in a curve shape when being elastically deformed due to the action of hydraulic oil, so that the rubber insulation sleeve 16 cannot be deformed in a straight line when being severely pressed; such as: when the cavity 17 is filled with hydraulic oil, the surface of the rubber insulating sleeve 16 is pressed, and the rubber insulating sleeve 16 tends to be deformed in a curve shape due to the bearing effect of the hydraulic oil, so that the rubber insulating sleeve 16 is prevented from being wrinkled.
The first spacing ring 14 is integrative to be set up in the one end of hard pipeline 13, the detachable setting of second spacing ring 15 is in the other end of hard pipeline 13, the hole setting of reserving on the hard pipeline 13 passed oil tank 10, the laminating of second spacing ring 15 is at the oil tank 10 inner wall, the laminating of first spacing ring 14 is at the oil tank 10 outer wall, the one end that the second spacing ring 15 is close to hard pipeline 13 is integrative to be provided with go-between 18, go-between 18 passes through screw-thread fit connection in the outer lane department of hard pipeline 13, the one side that hard pipeline 13 was kept away from to first spacing ring 14 is provided with annular groove 21, annular groove 21 lateral wall is provided with interpolation pipe 19, annular groove 21 bottom still is provided with the interpolation passageway 20 of intercommunication between cavity 17 and interpolation pipe 19.
The hydraulic oil can be supplemented into the cavity 17 through the adding pipe 19, the use and the control are convenient, the adding pipe 19 is further provided with a cap body, the cap body is used for sealing the end part of the adding pipe 19, the conventional common technology is omitted, the adding pipe 19 is arranged on the inner wall of the annular groove 21, the external object is not easily scratched and rubbed, and the protection is strong.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (8)
1. The utility model provides a distribution network voltage regulation phase modulation transformer, its characterized in that includes iron core (1) by iron leg and iron yoke, first phase modulation switch (6), second phase modulation switch (7), voltage regulation switch (8), reactor coil (9), oil tank (10), sleeve pipe (11) and integrated voltage current transformer (12), excitation winding (2), first phase modulation winding (3), second phase modulation winding (4) and voltage regulation winding (5) are equipped with to the cover in the outside of iron core (1), first phase modulation switch (6), second phase modulation switch (7) and voltage regulation switch (8) realize the parallel operation between two distribution networks; the sleeve (11) comprises a hard pipeline (13), a first limiting ring (14) and a second limiting ring (15), a rubber insulating sleeve (16) is fixedly arranged at the inner ring of the hard pipeline (13), a cavity (17) is formed between the outer ring of the rubber insulating sleeve (16) and the inner ring of the hard pipeline (13), and hydraulic oil is filled in the cavity (17); the utility model discloses a hard pipeline structure, including hard pipeline (13), first spacing ring (14), second spacing ring (15) detachable sets up in the one end of hard pipeline (13), the hole setting of reserving on hard pipeline (13) passed oil tank (10), second spacing ring (15) laminating is at oil tank (10) inner wall, first spacing ring (14) laminating is at oil tank (10) outer wall, the one end that second spacing ring (15) is close to hard pipeline (13) is integrative to be provided with go-between (18), go-between (18) are connected in the outer lane department of hard pipeline (13) through screw-thread fit, one side that hard pipeline (13) was kept away from to first spacing ring (14) is provided with annular groove (21), annular groove (21) lateral wall is provided with interpolation pipe (19), annular groove (21) bottom still is provided with intercommunication in cavity (17) and interpolation passageway (20) between interpolation pipe (19).
2. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: the head ends of the first phase modulation winding (3) and the second phase modulation winding (4) are connected with the head end of the exciting winding (2).
3. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: the integrated voltage and current transformer (12) is arranged on a source side and a load side of a transformer in the power distribution network, and the integrated voltage and current transformer (12) is used for collecting and automatically controlling voltage amplitude, phase and load current.
4. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: and an air-core reactor is connected in series with the inlet side of the transformer in the power distribution network.
5. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: the first power grid and the second power grid in the distribution network can achieve phase and voltage linkage through adjustment of the first phase modulation switch (6), the second phase modulation switch (7) and the voltage regulating switch (8), so that a closed loop network is formed.
6. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: the reactor coils (9) are connected in series on the inlet side of a transformer in the power distribution network.
7. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: the oil tank (10) is used for accommodating the iron core (1), the exciting winding (2), the first phase modulation winding (3), the second phase modulation winding (4) and the voltage regulation winding (5) which are sleeved outside the iron core column.
8. A voltage and phase regulating transformer for a power distribution network as claimed in claim 1, wherein: the sleeve (11) leads the excitation winding (2), the first phase modulation winding (3), the second phase modulation winding (4) and the voltage regulation winding (5) to the outside of the oil tank (10) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310250050.4A CN115985655B (en) | 2023-03-15 | 2023-03-15 | Voltage and phase regulating transformer for power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310250050.4A CN115985655B (en) | 2023-03-15 | 2023-03-15 | Voltage and phase regulating transformer for power distribution network |
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| CN115985655A CN115985655A (en) | 2023-04-18 |
| CN115985655B true CN115985655B (en) | 2023-07-21 |
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| CN202310250050.4A Active CN115985655B (en) | 2023-03-15 | 2023-03-15 | Voltage and phase regulating transformer for power distribution network |
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| CN210575428U (en) * | 2019-10-23 | 2020-05-19 | 福建捷达电力工程建设有限公司 | Voltage-resistant transformer bushing |
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| CN103219137B (en) * | 2013-03-26 | 2016-08-03 | 国家电网公司 | A kind of self adaptation load type distribution transformer |
| CN205230789U (en) * | 2015-12-28 | 2016-05-11 | 保定天威保变电气股份有限公司 | Self coupling phase -shifting transformer's winding wiring structure |
| CN105810395A (en) * | 2016-05-10 | 2016-07-27 | 国家电网公司 | Special heat-insulating power equipment for outside |
| CN111768959B (en) * | 2019-04-01 | 2022-03-08 | 台达电子企业管理（上海）有限公司 | Transformer device |
| CN110211805B (en) * | 2019-06-27 | 2022-03-01 | 国网河北省电力有限公司沧州供电分公司 | Oiling tool for transformer bushing |
| CN211455506U (en) * | 2020-03-11 | 2020-09-08 | 佛山佛锐电气有限公司 | Ring network type combined transformer |
| CN114927324A (en) * | 2022-02-28 | 2022-08-19 | 保定天威保变电气股份有限公司 | Star-shaped connected phase-shifting transformer |
| CN114999782B (en) * | 2022-05-31 | 2023-12-22 | 江苏宏源电气有限责任公司 | Phase-shifting transformer for loop closing transfer power supply |
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2023
- 2023-03-15 CN CN202310250050.4A patent/CN115985655B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202034749U (en) * | 2011-03-23 | 2011-11-09 | 上海永锦电力电器有限公司 | High voltage crosslinking cable composite coat cable terminal |
| CN209015738U (en) * | 2018-12-10 | 2019-06-21 | 武汉市江华电线电缆有限责任公司 | A kind of high-strength cable |
| CN210575428U (en) * | 2019-10-23 | 2020-05-19 | 福建捷达电力工程建设有限公司 | Voltage-resistant transformer bushing |
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