CN202871541U - Three-phase transformer system and power grid with the same - Google Patents
Three-phase transformer system and power grid with the same Download PDFInfo
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- CN202871541U CN202871541U CN 201220461812 CN201220461812U CN202871541U CN 202871541 U CN202871541 U CN 202871541U CN 201220461812 CN201220461812 CN 201220461812 CN 201220461812 U CN201220461812 U CN 201220461812U CN 202871541 U CN202871541 U CN 202871541U
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- pressure winding
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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
- Y02E40/30—Reactive power compensation
Abstract
The utility model discloses a three-phase transformer system. The three-phase transformer system comprises a three-phase voltage transformation unit. Per-phase voltage transformation unit comprises an iron core, a first low-voltage winding, a second low-voltage winding, a high-voltage winding and a direct-current power supply. For per-phase voltage transformation unit, the first low-voltage winding and the second low-voltage winding are arranged on the iron core in parallel. The first low-voltage windings and the second low-voltage windings of the three-phase voltage transformation unit are respectively in star connection. The high-voltage windings are sleeved on the first low-voltage windings and the second low-voltage windings. Positive poles and negative poles of the direct-current power supplies are respectively connected to neutrality points of the first low-voltage windings and the second low-voltage windings, wherein the first low-voltage windings and the second low-voltage windings are in star connection. According to the three-phase transformer system, magnetic saturation of the transformer iron cores is changed through adjusting direct current voltage, and therefore the purpose of changing transformer reactance values can be achieved. Besides, the utility model further provides a power grid with the three-phase transformer system.
Description
Technical field
The utility model relates to the power transformation technical field, has the three-phase transformer system of variable reactance and an electrical network with three-phase transformer system in particular to a kind of.
Background technology
Transformer (Transformer) is to utilize electromagnetic electromagnetic induction principle to change the device of alternating voltage, and main member is primary coil, secondary coil and iron core (magnetic core).Transformer is commonly used for lifting voltage, transformer matched impedance and safety isolation etc.
Usually, the reactance of transformer is by himself size and structural shape decision, and for the transformer of determining model, its reactance is fixed.But, in commercial Application, usually need to provide such transformer, this transformer reactance is adjustable, to inject inductive current in electrical network.
For example, in wind power generation or metallurgy industry, need the power factor (PF) of dynamic adjustments power network line, it is necessary to reactor need to be set individually, with the inductive current in the adjusting electrical network, and then the power factor (PF) of raising electrical network.But this must cause the very big increase of cost.
The utility model content
The utility model is intended to solve at least to a certain extent one of technical problem that exists in the prior art.
For this reason, first purpose of the present utility model is to propose a kind of three-phase transformer system, and power factor (PF) that can the dynamic adjustments circuit is stablized the electrical network Voltage-output, has saved disposable input.
In addition, the utility model need to provide a kind of electrical network, and described electrical network can be regulated the inductive current in the electrical network, and improves its power factor (PF).
For achieving the above object, first aspect of the present utility model has proposed a kind of three-phase transformer system, comprises the three-phase voltage transformation unit, and wherein every phase voltage transformation unit comprises: iron core; The first and second low pressure windings, described the first and second low pressure winding parallels are arranged on the described iron core, and described the first low pressure winding and described the second low pressure winding in the wherein said three-phase voltage transformation unit carry out respectively Y-connection; High pressure winding, described high pressure winding are sleeved on described the first and second low pressure windings.This three-phase transformer system and comprise DC power supply, the positive pole of described DC power supply and negative pole are connected to respectively the described first low pressure winding of Y-connection and the neutral point of described the second low pressure winding.
According to the three-phase transformer system that the utility model proposes, change the magnetic saturation of the iron core of three-phase voltage transformation unit by the voltage swing of regulating DC power supply, thereby change the reactance value of three-phase voltage transformation unit, adjustable to realize this three-phase transformer reactance.In application, use this three-phase transformer to be equivalent to the combination of traditional three-phase transformer and reactor, thereby reduced the commercial Application cost thus.
Wherein, the voltage swing of described DC power supply is adjustable.Can regulate as required thus the size of reactance.
Preferably, the cross section of described the first low pressure winding and the second low pressure winding is oval, and the cross section of described high pressure winding is rectangle.
And described high pressure winding is identical with the turn ratio of described the first low pressure winding and described high pressure winding and described the second low pressure winding.
Preferably, the high pressure winding of described three-phase voltage transformation unit can triangular in shapely connect.
Wherein, described iron core is parallel fixing by juxtaposed the first fixture and the second fixture.
And described iron core is integrally formed, and described iron core also comprises: upper core body and lower core body; And three pairs of iron core column, described three pairs of iron core column respectively parallel being connected on upper core body and lower core body and every pair of described iron core column are twined respectively described first, second low pressure winding and described high pressure winding.
For achieving the above object, second aspect of the present utility model has also proposed a kind of electrical network, and this electrical network comprises: main electrical network; Local power net, described local power net pass through main step-up transformer to described main mains supply; At least one wind power generation unit, described wind power generation unit is powered to described local power net by above-mentioned three-phase transformer system; And controller, described controller is controlled the voltage of described DC power supply according to the grid power factor of the input side of described local power net or outlet side.
According to the electrical network that the utility model proposes, voltage swing by the DC power supply of three-phase transformer system in the control electrical network, thereby generation inductive current, and injection electrical network, reached the purpose of dynamic adjustments power network line power factor (PF), improve the active power of generating, power transformation and power consumption equipment, stablize the line voltage of power transmission and transformation, improve the quality of power supply.Simultaneously, no longer need to increase in addition the equipment such as Regulatable reactor, greatly saved disposable cost and dropped into.
In addition, described electrical network also comprises: the capacitance compensation unit, described capacitance compensation unit carries out reactive power compensation to the output of described at least one wind power generation unit.
The third aspect of the present utility model has also proposed a kind of local power net, comprises described three-phase transformer system.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the principle schematic according to the three-phase transformer system of an embodiment of the present utility model;
Fig. 2 is the vertical view according to the three-phase voltage transformation unit of an embodiment of the present utility model;
Fig. 3 is the cutaway view according to the three-phase voltage transformation unit of an embodiment of the present utility model;
Fig. 4 is the supply network schematic diagram according to the electrical network of an embodiment of the present utility model; And
Fig. 5 is the supply network schematic diagram according to the electrical network of a concrete example of the present utility model.
Embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, term " vertically ", " laterally ", " on ", orientation or the position relationship of the indications such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " be based on orientation shown in the drawings or position relationship, it only is the utility model rather than require the utility model with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model for convenience of description.
Be exemplary on the following illustrative in nature, rather than limit by any way the disclosure, application of the present disclosure or use.For simplicity, will use in the accompanying drawings identical reference number to identify similar element.As used herein, term at least at least one among A, B and the C it must be understood that as referring to logic (A or B or C), use the nonexcludability logic or.It must be understood that in the situation that does not change principle of the present disclosure, the step in the method can different orders be carried out.
As used herein, term module, unit refer to memory, the combinational logic circuit of using specific integrated circuit (ASIC), circuit, processor (share, special-purpose or in groups) and one or more softwares of execution or firmware program and/or other suitable components that institute's representation function is provided.
The three-phase transformer system that proposes according to the utility model embodiment and the electrical network with three-phase transformer system are described with reference to the accompanying drawings.
As shown in Figure 1, a kind of three-phase transformer system that the first aspect of the utility model embodiment proposes comprises three-phase voltage transformation unit 101 and DC power supply 102.Wherein, every phase voltage transformation unit 1 comprises iron core 10, the first low pressure winding 11, the second low pressure winding 12 and high pressure winding 13, and the iron core 10 in every phase voltage transformation unit 1 comprises a pair of iron core column 100 and 200, the first low pressure winding 11 and the second low pressure winding 12 are arranged in parallel on iron core 10, for example the first low pressure winding 11 is arranged on the iron core column 100, and the second low pressure winding 12 is arranged on the iron core column 200.Wherein the first low pressure winding 11 in the three-phase voltage transformation unit 101 and the second low pressure winding 12 carry out respectively Y-connection.High pressure winding 13 is sleeved on the first low pressure winding 11 and the second low pressure winding 12.The positive pole (+) of DC power supply 102 and negative pole (-) are connected to respectively the neutral point O 1 of the first low pressure winding 11 of Y-connection and the neutral point O 2 of the second low pressure winding 12, and the voltage swing of DC power supply 102 is adjustable.The magnetic saturation of iron core 10 can be changed by the size of regulating DC power supply 102, thereby the purpose that changes three-phase voltage transformation unit 101 reactance values can be reached.
In embodiment of the present utility model, as shown in Figure 1, the turn ratio of three-phase voltage transformation unit 101 mesohigh windings 13 and the first low pressure winding 11 is identical with the turn ratio of high pressure winding 13 and the second low pressure winding 12.And, in an embodiment of the present utility model, high pressure winding 13 connections triangular in shape of three-phase voltage transformation unit 101.Certainly, be understandable that the high pressure winding 13 of three-phase voltage transformation unit 101 also can be Y-connection.Wherein, the cross section of the first low pressure winding 11 and the second low pressure winding 12 is oval, and the cross section of high pressure winding 13 is rectangle.
That is to say that when the voltage of DC power supply 102 was zero, the performance of the three-phase voltage transformation unit 101 among the utility model embodiment was identical with common transformer, by boosting or the step-down transmitting energy.When the voltage that applies DC power supply 102 reaches certain value, as shown in Figure 1, in arbitrary period of sine wave, alternating current-direct current flow direction in a pair of iron core 10 in iron core 100 is consistent, alternating current-direct current flow direction in another iron core 200 is opposite, and therefore always an iron core is closely saturated for the iron core in two groups of corresponding low pressure windings, and another iron core undersaturation, this moment, this three-phase voltage transformation unit 101 had the function of regulative reactance, thereby can inject inductive current to electrical network.Wherein, dotted arrow is the exchange flux direction among Fig. 1, and solid arrow is the direct current flux direction.
In embodiment of the present utility model, as shown in Figure 1, high pressure winding 13 is connected respectively to high-pressure side A, B, C, and the first low pressure winding 11 and the second low pressure winding 12 in every phase voltage transformation unit 1 are connected respectively to low-pressure end a, b, c.
In an embodiment of the present utility model, as shown in Figure 2, iron core 10 is parallel fixing by juxtaposed the first fixture 21 and the second fixture 22.Six iron core column can be completely fixed by the first fixture 21 and the second fixture 22.
And such as 1 and shown in Figure 3, the iron core of three-phase voltage transformation unit 101 is integrally formed, comprises in addition upper core body 31, lower core body 32 and the three pairs of iron core column 100,200.The three pairs of iron core column 100,200 respectively parallel being connected on upper core body 31 and lower core body 32 and the every pair of iron core column 100,200 are twined respectively the first low pressure winding 11, the second low pressure winding 12, high pressure winding 13 is wrapped in above the iron core 10, and is sleeved on the outside of the first low pressure winding 11 and the second low pressure winding 12.
Three-phase transformer system according to the utility model embodiment, change the magnetic saturation of the iron core 10 of three-phase voltage transformation unit 101 by the voltage swing of regulating DC power supply 102, thereby change the reactance value of three-phase voltage transformation unit 101, adjustable to realize this three-phase transformer reactance.In application, use this three-phase transformer to be equivalent to the combination of traditional three-phase transformer and reactor, thereby reduced the commercial Application cost thus.
The below describes the electrical network with above-mentioned three-phase transformer system with reference to Fig. 4,5.As shown in Figure 4, this electrical network comprises main electrical network 41, local power net 42, at least one wind power generation unit 43, controller 44, main step-up transformer 45 and three-phase transformer system 46.
Local power net 42 is increased to the voltage of main electrical network 41 by main step-up transformer 45 with the voltage of local power net 42, also becomes owner of simultaneously electrical network 41 with to main electrical network 41 power supplies.In an example of the present utility model, the voltage of local power net 42 can be 35KV, and the voltage of main electrical network can be 220KV, and for example in the wind power generation industry, local power net 42 can be comprised of 33 wind power generation units 43 and transformer.
As shown in Figure 4, each wind power generation unit 43 is all by simultaneously local area electrical network 42 power supplies of three-phase transformer system 46.Controller 44 is used for controlling according to the grid power factor of the input side of local power net 42 or outlet side the voltage of DC power supply 102, for example, monitor in real time the grid power factor of the input side of local power net 42 or outlet side less than 0.85 o'clock at controller 44, controller 44 is controlled immediately DC power supply 102 and is started, and compensates to inject inductive current to electrical network by the voltage of regulating DC power supply 102.
Particularly, as shown in Figure 5, above-mentioned electrical network also comprises capacitance compensation unit 51.Wherein, controller 44 comprises master controller 52 and the sub-controller 53 corresponding with capacitance compensation unit 51.Each capacitance compensation unit 51 is used for reactive power compensation is carried out in the output of at least one wind power generation unit 43.In an example of the present utility model, 33 capacitance compensation unit 51 can consist of automatic switching capacitor group.That is to say, by automatic switching capacitor group to the output of 33 wind power generation units 43 for example the voltage of 690V carry out reactive power compensation, harmonic carcellation, and compensation is periodic.
Wherein, corresponding between wind power generation unit 43, sub-controller 53, capacitance compensation unit 51 and the three-phase transformer system 46.That is to say, in an example of the present utility model, as shown in Figure 5, master controller 52 is monitored change in voltage and the power factor of the outlet side of local power net 42 in real time, controls simultaneously the input side of 33 sub-controller 53 local area electrical networks 42 and the power factor between 33 three-phase transformer systems 46 and monitors.Master controller 52 is regulated the voltage of DC power supply 102 in 33 three-phase transformer systems 46 accordingly according to the input side of the local power net 42 that real-time monitors and 33 sub-controllers 53 of grid power factor control of outlet side, also carries out on the spot dynamic passive compensation by the accordingly output of 51 pairs of corresponding wind power generation units 43 of control capacitance compensating unit of sub-controller 53 simultaneously.
I.e. speech, master controller 52 is according to the variation of grid power factor and line voltage, immediately drops into capacitance current or inductive current compensates.Particularly, when the blower fan heavy-duty service in the wind power generation unit 43, automatically starting input capacitance compensation unit 51 is that automatic switching capacitor group is carried out dynamic passive compensation, and this moment, inductive current can be 0; Blower fan in wind power generation unit 43 load hour, excision capacitance compensation unit 51, and the voltage of regulating DC power supply 102 is to rated value provides inductive current by three-phase transformer system 46 to electrical network, stablizes line voltage; When three-phase electricity depressor system 46 and capacitance compensation unit 51 compensate simultaneously, when being shoulder load, the voltage of regulating DC power supply 102 0 to dynamic change between the rated value, reaches the purpose of administering mains by harmonics, improving grid supply quality with the control inductive current.For example in metallurgy industry, also be that the voltage by regulating DC power supply 102 is so that three-phase transformer system 46 provides inductive current to electrical network under normal circumstances.
In another embodiment of the present utility model, three-phase electricity depressor system 46 can also adopt the mode of phase shift to arrange, and when the three-phase electricity depressor system 46 that adopts phase shift system is connected to the grid, owing to possess 33 three-phase transformer systems 46, each three-phase transformer system 46 can adopt different phase shift systems, i.e. the phase angle of phase shift is different, thereby after the stack harmonic wave of local area network (LAN) is greatly reduced, harmonic wave control when avoiding being incorporated into the power networks improves the quality of power supply.
Electrical network according to the utility model embodiment, voltage swing by the DC power supply 102 of three-phase transformer system 46 in the control electrical network, thereby generation inductive current, and injection electrical network, reached the purpose of dynamic adjustments power network line power factor (PF), improve the active power of generating, power transformation and power consumption equipment, stablize the line voltage of power transmission and transformation, improve the quality of power supply.Simultaneously, no longer need to increase in addition the equipment such as Regulatable reactor, greatly saved disposable cost and dropped into.
In addition, the third aspect of the utility model embodiment has also proposed a kind of local power net, comprises above-mentioned three-phase transformer system.Be understandable that, generally comprise the electrical network of above-mentioned three-phase transformer system, just can be by regulating the voltage of the DC power supply in the three-phase transformer system, thereby the generation inductive current injects electrical network and goes, and then reaches the adjusting grid power factor, harmonic carcellation improves the purpose of power grid quality.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment in the situation that does not break away from principle of the present utility model and aim, scope of the present utility model is limited by claim and equivalent thereof.
Claims (9)
1. a three-phase transformer system is characterized in that, comprising:
The three-phase voltage transformation unit, wherein every phase voltage transformation unit comprises:
Iron core;
The first and second low pressure windings, described the first and second low pressure winding parallels are arranged on the described iron core, and described the first low pressure winding and described the second low pressure winding in the wherein said three-phase voltage transformation unit carry out respectively Y-connection;
High pressure winding, described high pressure winding are sleeved on described the first and second low pressure windings; And DC power supply, the positive pole of described DC power supply and negative pole are connected to respectively the described first low pressure winding of Y-connection and the neutral point of described the second low pressure winding.
2. three-phase transformer according to claim 1 system is characterized in that, the cross section of described the first low pressure winding and the second low pressure winding is oval, and the cross section of described high pressure winding is rectangle.
3. three-phase transformer according to claim 1 system is characterized in that described high pressure winding is identical with the turn ratio of described the first low pressure winding and described high pressure winding and described the second low pressure winding.
4. three-phase transformer according to claim 1 system is characterized in that the high pressure winding connection triangular in shape of described three-phase voltage transformation unit.
5. three-phase transformer according to claim 1 system is characterized in that, described iron core is parallel fixing by juxtaposed the first fixture and the second fixture.
6. three-phase transformer according to claim 1 system is characterized in that the integrally formed and described iron core of described iron core comprises:
Upper core body and lower core body; And
Three pairs of iron core column, described three pairs of iron core column respectively parallel being connected on upper core body and lower core body and every pair of described iron core column are twined respectively described first, second low pressure winding and described high pressure winding.
7. an electrical network is characterized in that, comprising:
Main electrical network;
Local power net, described local power net pass through main step-up transformer to described main mains supply;
At least one wind power generation unit, described wind power generation unit by as each described three-phase transformer system among the claim 1-6 to as described in the local power net power supply; And
Controller, described controller are controlled the voltage of described DC power supply according to the grid power factor of the input side of described local power net or outlet side.
8. electrical network according to claim 7 is characterized in that, also comprises:
The capacitance compensation unit, described capacitance compensation unit carries out reactive power compensation to the output of described at least one wind power generation unit.
9. a local power net is characterized in that, comprises such as each described three-phase transformer system among the claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220461812 CN202871541U (en) | 2012-09-11 | 2012-09-11 | Three-phase transformer system and power grid with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220461812 CN202871541U (en) | 2012-09-11 | 2012-09-11 | Three-phase transformer system and power grid with the same |
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| Publication Number | Publication Date |
|---|---|
| CN202871541U true CN202871541U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220461812 Expired - Fee Related CN202871541U (en) | 2012-09-11 | 2012-09-11 | Three-phase transformer system and power grid with the same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891001A (en) * | 2012-09-11 | 2013-01-23 | 沈阳昊诚电气股份有限公司 | Three-phase transformer system and power grid with same |
| CN110112927A (en) * | 2019-05-16 | 2019-08-09 | 中国科学院电工研究所 | AC network dual-port flexibility ring device |
| CN112335002A (en) * | 2018-05-31 | 2021-02-05 | 豪倍公司 | Three-phase ring transformer |
-
2012
- 2012-09-11 CN CN 201220461812 patent/CN202871541U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891001A (en) * | 2012-09-11 | 2013-01-23 | 沈阳昊诚电气股份有限公司 | Three-phase transformer system and power grid with same |
| CN102891001B (en) * | 2012-09-11 | 2016-03-30 | 沈阳昊诚电气有限公司 | Three-phase transformer system and there is its electrical network |
| CN112335002A (en) * | 2018-05-31 | 2021-02-05 | 豪倍公司 | Three-phase ring transformer |
| CN110112927A (en) * | 2019-05-16 | 2019-08-09 | 中国科学院电工研究所 | AC network dual-port flexibility ring device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Sun Chuanmin Inventor after: Wang Chengmin Inventor after: Sun Yu Inventor after: Yin Wen Inventor after: Zhu Kai Inventor before: Sun Chuanmin Inventor before: Sun Yu Inventor before: Yin Wen Inventor before: Zhu Kai |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: SUN CHUANMIN SUN YU YIN WEN ZHU KAI TO: SUN CHUANMIN WANG CHENGMIN SUN YU YIN WEN ZHU KAI |
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| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee after: Shenyang Haocheng Electrical Equipment Co., Ltd. Address before: 110027 Shenyang economic and Technological Development Zone, Liaoning Province, No. 1, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone Patentee before: Shenyang Haocheng Electric Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20200911 |