CN115985655A - Voltage-regulating phase-modulating transformer for power distribution network - Google Patents
Voltage-regulating phase-modulating transformer for power distribution network Download PDFInfo
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- CN115985655A CN115985655A CN202310250050.4A CN202310250050A CN115985655A CN 115985655 A CN115985655 A CN 115985655A CN 202310250050 A CN202310250050 A CN 202310250050A CN 115985655 A CN115985655 A CN 115985655A
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- 238000004804 winding Methods 0.000 claims abstract description 78
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000005284 excitation Effects 0.000 claims abstract description 16
- 239000003921 oil Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000010720 hydraulic oil Substances 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention relates to a voltage-regulating and phase-modulating transformer for a power distribution network. The voltage-regulating phase-modulating transformer for the power distribution network belongs to the technical field of transformers; the voltage-regulating and phase-modulating transformer for the power distribution network comprises an iron core consisting of an iron core column and an iron yoke, a first phase-modulating switch, a second phase-modulating switch, a voltage-regulating switch, a reactor coil, an oil tank, a sleeve and an integrated voltage-current transformer, and consists of an excitation winding, a phase-modulating winding and a voltage-regulating winding; and meanwhile, information of the amplitude and the phase angle of the voltage at two sides and the magnitude of the load current collected by the source-side and load-side integrated voltage current transformers is uploaded to the automatic control device, and the automatic device automatically adjusts the voltage and the phase angle according to the set information to optimize the operation of the system.
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 power grid technology, the connection between networks is also becoming more and more extensive. The power flow distribution among power distribution networks is adjusted, and the connection among different power networks is wider. For two power distribution networks with the same voltage grade, voltage amplitude has certain deviation due to different loads, and voltage phase angles between the first and second power distribution networks also have certain deviation and generally cannot be directly connected. In order to realize the connection of two power distribution networks with the same voltage class, a transformer capable of regulating voltage and phase is required. The invention relates to a transformer technology which can simultaneously regulate voltage, phase and power flow distribution of two power distribution networks in a power distribution network at present, belongs to a blank area and aims to fill the blank area.
Aiming at the situation, the invention analyzes the distribution of the tidal current between the power distribution networks, judges 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, and acquires the signals of the voltage amplitude deviation and the voltage phase angle between the two 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, thereby effectively controlling and adjusting the tidal current distribution in the power distribution networks and fully utilizing the power distribution network resources.
Disclosure of Invention
The invention aims to solve the problems and provide a voltage-regulating and phase-modulating transformer for a power distribution network, which has a simple structure and a reasonable design.
The invention achieves the above purpose through the following technical scheme:
the utility model provides a distribution network pressure regulating phase modulation transformer, includes iron core, first phase modulation switch, second phase modulation switch, voltage regulating switch, reactor coil, oil tank, sleeve pipe and the integrated voltage current transformer who comprises iron core column and yoke, the cover is equipped with excitation winding, first phase modulation winding, second phase modulation winding and voltage regulating winding outside the iron core, the operation side by side between two distribution networks is realized to first phase modulation switch, second phase modulation switch and voltage regulating switch.
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 together with the head end of the excitation winding.
As a further optimization scheme of the invention, the integrated voltage current transformers are arranged on the side of the transformer source and the side of the load in the power distribution network, and the integrated voltage current transformers are used for collecting and automatically controlling the voltage amplitude, the phase and the load current.
As a further optimization scheme of the invention, an air core reactor is connected in series on 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 power grid can achieve phase and voltage linkage by adjusting the first phase modulation switch, the second phase modulation switch and the voltage regulation switch to form a closed-loop network.
As a further optimization scheme of the invention, the reactor coil is 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 excitation 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 pipes lead the leads of the excitation winding, the first phase modulation winding, the second phase modulation winding and the voltage regulating 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 hole reserved on the oil tank and is arranged, 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 a connecting ring, the connecting ring is connected to the outer ring of the hard pipeline in a threaded fit manner, one surface, far away from the hard pipeline, of the first limiting ring is provided with an annular groove, the side wall of the annular groove is provided with an adding pipe, and the bottom of the annular groove is further provided with an 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 two power distribution networks with deviation of voltage amplitudes and deviation of phase angles can be connected together by arranging the voltage regulation winding and the phase modulation winding, thereby realizing grid-connected operation; meanwhile, information of the amplitude and the phase angle of the voltage on two sides and the magnitude of the load current collected by the source side and load side integrated voltage current transformers is uploaded to the automatic control device, the automatic control device automatically adjusts the voltage and the phase angle according to set information, and system operation is optimized. Meanwhile, aiming at the condition that short circuit to the ground occurs frequently in the power distribution network, an air-core reactor is connected in series at 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 pipe solves the problems that the sleeve pipe is easy to damage due to overvoltage and heavy current and the service life of the sleeve pipe is shortened, and improves the capability of the sleeve pipe for bearing the action of working voltage and load current for a long time and short-time overvoltage and heavy current in faults.
Drawings
FIG. 1 is a top view of a voltage and phase regulating transformer for a power distribution network according to the present invention;
FIG. 2 is a side view of the voltage and phase regulating transformer for the distribution network of the present invention;
FIG. 3 is a wiring diagram of the voltage-regulating and phase-modulating transformer of the power distribution network of the present invention;
FIG. 4 is a schematic view of a hard pipe structure according to the present invention;
FIG. 5 is a schematic view of the internal structure of the hard pipe of the present invention;
FIG. 6 is a schematic view of the structure of the present invention in which the hard pipe is connected to the fuel tank;
FIG. 7 is an enlarged view of the structure at A in FIG. 5 according to the present invention;
FIG. 8 is an enlarged view of the structure at B in FIG. 6 according to the present invention.
In the figure: the phase modulation 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 present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1 to 8, a voltage-regulating and phase-modulating transformer for a power distribution network comprises an iron core 1 consisting of an iron core column and an iron yoke, 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 the parallel operation between two power distribution networks.
A conventional transformer generally comprises a high-voltage winding and a low-voltage winding, and a three-winding transformer comprises a high-voltage winding, a medium-voltage winding and a low-voltage winding. For the transformer with on-load voltage regulation, a separate voltage regulation winding can 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, so that the two power distribution networks with deviation of voltage amplitudes and deviation of phase angles can be connected together, and grid-connected operation is realized.
Meanwhile, information of voltage amplitude values and phase angles at two sides and load current sizes collected by the transformer source side and load side integrated voltage current transformers 12 in the power distribution network is uploaded to an automatic control device, and the automatic device automatically adjusts the voltage and the phase angles according to set information to optimize system operation.
Meanwhile, aiming at the condition that short circuit to the ground occurs frequently in the power distribution network, an air-core reactor is connected in series at 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 excitation winding 2; .
When the phase of the first power grid leads the second power grid by an angle, the first phase modulation switch 6 is adjusted to a corresponding gear, and the second phase modulation switch 7 is adjusted to a 1 st gear; when the phase of the first power grid lags behind the second power grid by an angle, the first phasing switch 6 is adjusted to a 1 st gear, and the second phasing switch 7 is adjusted to a 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;
through the regulation of the first phase modulation switch 6, the second phase modulation switch 7 and the voltage regulation switch 8, the first power grid and the second power grid can achieve phase and voltage linkage to form a closed-loop network.
The reactor coil 9 is connected in series on 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 whole short-circuit impedance of the transformer can be improved, the sleeve 11 leads the leads of 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, and the oil tank 10 is used for accommodating the iron core 1, the excitation 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.
Because the bushing 11 of the transformer needs to bear the action of working voltage, load current, short-time overvoltage and large current during fault for a long time in operation, the bushing 11 is correspondingly improved in the invention, which comprises the following steps:
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 insulating sleeve 16 is arranged on the inner ring of the hard pipeline 13, the rubber insulating sleeve 16 can elastically deform to a certain degree, 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 heated seriously, the rubber insulating sleeve 16 replaces the sleeve 11 to expand and deform due to the fact that the elastic deformation capacity of the rubber insulating sleeve 16 is strong, and the rubber insulating sleeve is suitable for the passage of the overvoltage and the heavy current; hydraulic oil is filled in the cavity 17, so that the sleeve 11 can be cooled when being heated, and a certain cooling protection effect is achieved; meanwhile, the rubber insulating sleeve 16 tends to curve-shaped deformation when elastically deformed by the action of the hydraulic oil, so that the rubber insulating sleeve 16 cannot linearly deform when severely pressed at one position; such as: when no filler is filled in the cavity 17, the rubber insulating sleeve 16 is easily wrinkled when being pressed, so that the rubber insulating sleeve 16 is seriously worn and the service life is reduced, and when the cavity 17 is filled with hydraulic oil and the surface of the rubber insulating sleeve 16 is pressed, the rubber insulating sleeve 16 is easily prone to curve deformation due to the supporting effect of the hydraulic oil, and wrinkles cannot occur.
The first limiting ring 14 is integrally arranged at one end of the hard pipeline 13, the second limiting ring 15 is detachably arranged at the other end of the hard pipeline 13, the hard pipeline 13 penetrates through a hole reserved in the oil tank 10, the second limiting ring 15 is attached to the inner wall of the oil tank 10, the first limiting ring 14 is attached to the outer wall of the oil tank 10, a connecting ring 18 is integrally arranged at one end, close to the hard pipeline 13, of the second limiting ring 15, the connecting ring 18 is connected to the outer ring of the hard pipeline 13 through thread fit, an annular groove 21 is formed in one surface, away from the hard pipeline 13, of the first limiting ring 14, an adding pipe 19 is arranged on the side wall of the annular groove 21, and an adding channel 20 communicated between the cavity 17 and the adding pipe 19 is further arranged at the bottom of the annular groove 21.
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 description is omitted for the prior common technology, the adding pipe 19 is arranged on the inner wall of the annular groove 21, the influence of scratching of external objects is not easy to occur, and the protection performance is high.
The above examples only show several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The utility model provides a distribution network pressure regulating phase modulation transformer, its characterized in that includes iron core (1), first phase modulation switch (6), second phase modulation switch (7), regulating voltage switch (8), reactor coil (9), oil tank (10), sleeve pipe (11) and integrated voltage current transformer (12) of compriseing iron core column and yoke, iron core (1) outside cover is equipped with excitation winding (2), first phase modulation winding (3), second phase modulation winding (4) and regulating voltage winding (5), parallel operation between two distribution networks is realized to first phase modulation switch (6), second phase modulation switch (7) and regulating voltage switch (8).
2. The voltage-regulating and phase-modulating transformer for the power distribution network of claim 1, characterized in that: 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 excitation winding (2).
3. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: the integrated voltage and current transformer (12) is arranged on the side of the transformer source and the side of the load in the power distribution network, and the integrated voltage and current transformer (12) is used for collecting and automatically controlling the voltage amplitude, the phase and the load current.
4. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: and an air core reactor is connected in series on the inlet side of the transformer in the power distribution network.
5. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: through the adjustment of the first phase modulation switch (6), the second phase modulation switch (7) and the voltage regulation switch (8), the first power grid and the second power grid in the power distribution network can achieve phase and voltage linkage to form a closed-loop network.
6. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: the reactor coil (9) is connected in series on the inlet side of a transformer in the power distribution network.
7. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: the oil tank (10) is used for accommodating the iron core (1), the excitation winding (2) sleeved outside the iron core column, the first phase modulation winding (3), the second phase modulation winding (4) and the voltage regulating winding (5).
8. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: and the sleeve (11) leads the exciting winding (2), the first phase modulation winding (3), the second phase modulation winding (4) and the voltage regulating winding (5) to the outside of the oil tank (10) respectively.
9. The voltage-regulating phase-modulating transformer for the power distribution network of claim 1, wherein: casing (11) are including hard pipeline (13), first spacing ring (14), second spacing ring (15), the fixed rubber insulation cover (16) that is provided with in inner circle department of hard pipeline (13), form cavity (17) between the outer lane of rubber insulation cover (16) and the inner circle of hard pipeline (13), it has hydraulic oil to fill in cavity (17).
10. The voltage regulating and phase modulating transformer for distribution network of claim 9, characterized in that: first spacing ring (14) an organic whole sets up in the one end of hard pipeline (13), the dismantled and assembled setting in the other end of hard pipeline (13) of second spacing ring (15), hole setting of reserving on oil tank (10) is passed in hard pipeline (13), and laminating in oil tank (10) inner wall second spacing ring (15), and laminating in oil tank (10) outer wall first spacing ring (14), the one end an organic whole that second spacing ring (15) are close to hard pipeline (13) is provided with go-between (18), go-between (18) are connected in the outer lane department of hard pipeline (13) through screw-thread fit, the one side that hard pipeline (13) were kept away from in 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 at cavity (17) and interpolation passageway (20) that add between pipe (19).
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 true CN115985655A (en) | 2023-04-18 |
| CN115985655B CN115985655B (en) | 2023-07-21 |
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| 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 |
| CN110211805A (en) * | 2019-06-27 | 2019-09-06 | 国网河北省电力有限公司沧州供电分公司 | Oil filling tool for transformer bushing |
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| CN211455506U (en) * | 2020-03-11 | 2020-09-08 | 佛山佛锐电气有限公司 | Ring network type combined transformer |
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| 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 |
| CN114999782A (en) * | 2022-05-31 | 2022-09-02 | 江苏宏源电气有限责任公司 | Phase-shifting transformer for closed-loop switching power supply |
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2023
- 2023-03-15 CN CN202310250050.4A patent/CN115985655B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| WO2014153936A1 (en) * | 2013-03-26 | 2014-10-02 | 国家电网公司 | Self-adaptive 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 |
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| CN115985655B (en) | 2023-07-21 |
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