CN100385766C - Stator double winding asynchronous electrical machine matrix type collecting and generating system of wind force generating field on the sea - Google Patents
Stator double winding asynchronous electrical machine matrix type collecting and generating system of wind force generating field on the sea Download PDFInfo
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- CN100385766C CN100385766C CNB2005100411993A CN200510041199A CN100385766C CN 100385766 C CN100385766 C CN 100385766C CN B2005100411993 A CNB2005100411993 A CN B2005100411993A CN 200510041199 A CN200510041199 A CN 200510041199A CN 100385766 C CN100385766 C CN 100385766C
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- 238000010248 power generation Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 abstract description 10
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Abstract
The present invention relates to a stator double-winding asynchronous motor matrix type electricity collecting and generating system of a wind force electricity generating field on the sea, which belongs to a high voltage and direct current asynchronous motor electricity generating system. The matrix type electricity collecting system is formed by connecting a plurality of stator double-winding asynchronous motor electricity generating systems in a matrix type of a series-parallel connection form, and a unit of the stator double-winding asynchronous motor electricity generating systems comprises a stator double-winding asynchronous motor, an excitation changer, a controller, an alternating-current capacitor, a rectifier and a wave filtering capacitor. The motor is provided with two sets of windings on a stator, wherein one winding is a main winding of which the outside is connected with a rectifying bridge, and the main winding is changed into the direct current and transfers the power outwards; the other winding is an excitation winding used for adjusting the excitation current, and the two windings are not directly connected with each other on a circuit. The output direct current voltages of a plurality of electricity generating units are connected in series to form the rows of a matrix electricity collecting system, and a plurality of rows are connected in parallel to form a complete matrix electricity collecting system. Therefore, the matrix type electricity collecting and generating system can provide the direct current with high voltage and high power. The matrix type electricity collecting and generating system has the advantages of high safety, reliability, easy construction, low cost and convenient maintenance, which is particularly suitable for wind force electricity generating fields on the sea, grasslands, deserts, etc. where three phase electric fences are not easy to reach.
Description
One, technical field:
The stator double-winding asynchronous matrix type collecting electricity generation system of Oversea wind power generation of the present invention field belongs to the high voltage direct current asynchronous machine power generation system
Two, background technology:
Wind power generation is becoming the hot technology that various countries make great efforts development, because it has very important meaning aspect overcoming energy shortage and preventing the pollution of the environment.A large amount of asynchronous machines that use in the wind power generation, the most general current generation technology is a three-phase alternating current double fed asynchronous machine generation technology, its feature is that stator winding output is directly connected to the three-phase alternating current electrical network, the rotor winding is by inverter supply, utilize the variable speed constant frequency technology, directly send the stable three-phase 50Hz alternating current of voltage.In recent years, risen Oversea wind power generation abroad again, it is 3～5MW that ABB AB in 1998 has developed single-machine capacity, and voltage is the high pressure synchronous generator of 1.2KV, and plan is installed on a coastal waters wind field of Sweden, in the hope of marine wind electric field is made evaluation.Its system authority such as accompanying drawing 1.As we can see from the figure, this marine wind electric field is because cable laying is difficult especially, and it specially becomes design of electrical motor high-tension magneto (1.2KV), and rectification output high voltage direct current.Like this, the cable of feed just becomes two thinner cables, lays easily in the seabed.If send high-power wind turbine, then one is to strengthen single-machine capacity (model machine the 3～5MW), the 2nd of ABB AB's test, output in parallel.This marine wind electric field cost height is difficult to build, and, magneto demagnetization difficulty, in case have an accident, fail safe is a problem very much.
Three, summary of the invention
The objective of the invention is problem at above-mentioned prior art existence, propose a kind of safe and reliablely, build easily, cheap, easy to maintenance, the stator double-winding asynchronous matrix type collecting electricity generation system of the galvanic Oversea wind power generation of high-power field can be provided.
The stator double wrap asynchronous machine matrix type collecting electricity generation system of Oversea wind power generation of the present invention field, be with asynchronous motor power generation system of stator duplex winding as generator unit, carry out electricly series-parallel connected mode and forming the outwards matrix type collecting electricity generation system of output high voltage direct current.The output that is about to the generator unit of the double-winding asynchronous electricity generation system of said stator is connected mutually, the generator unit of this series connection becomes the row of matrix type collecting system, with output of each row and be unified into row and constitute the outwards matrix type collecting electricity generation system of output high voltage direct current.
Asynchronous motor power generation system of stator duplex winding, comprise stator double-winding asynchronous, pwm converter, controller, rectifier and filter capacitor.Wherein stator double-winding asynchronous rotor is general cage-type rotor, two cover windings are arranged on the stator, and a cover is main winding, and its output is connected to ac capacitor, outwards transmit electrical power, export the constant voltage direct current by the current rectifying and wave filtering circuit that rectifier and filter capacitor are formed; Another set of winding is an excitation winding, is connected in the pwm converter that links to each other with controller, provides required compensating reactive power electric current by pwm converter, by the control of controller, realizes the constant of main winding output voltage.
The present invention has following tangible advantage:
1. asynchronous machine is cheap, brushless slip ring, reliability height.
2. be component units with stator double-winding asynchronous system, after carrying out the matrix current collection of connection in series-parallel connected mode on electric, can be easy to obtain the output of high-power direct current, and the power of each component units is little, voltage is not high, and cost is further cheap.
3. stator double-winding asynchronous characteristics are that two windings are arranged on stator, and main winding is participated in current collection and connected, in the major loop, and except that power diode, unregulated power electronic switching device and control section; And comprise the control section of electronic power switch device, and not having in the direct-connected energized circuit of circuit with major loop entirely, field circuit is littler than main circuit power, voltage is not high yet, therefore this unit reliability is high, and cheap, at sea builds easily.
4. the total voltage and the capacity of whole matrix type collecting output can change easily with series-parallel branch road, that is to say that series unit is many, and output voltage can be very high; Parallel branch is many, and output capacity can be very big.
5. safeguard very conveniently,, can chargedly excise, and adjust the output of other unit, keep original total dateout constant if wherein there is a unit that fault is arranged.After the unit that excises keeps in repair, can enter matrix group at any time again, the hot plug function is promptly arranged.
Four, description of drawings
Fig. 1 adopts the wind energy turbine set of high-voltage power machine technology to be electrically connected schematic diagram.
Fig. 2 is the stator double-winding asynchronous matrix type collecting electricity generation system schematic diagram of Oversea wind power generation field.
Fig. 3 is the asynchronous motor power generation system of stator duplex winding schematic diagram.
Label title among Fig. 3,1. stator double-winding asynchronous, 2. pwm converter, 3. capacitor C
1, 4. controller, 5. main winding output ac capacitor C
2, 6. rectifier, 7. filter capacitor C
3, 8. current sensor, 9 and 10. voltage sensors.
Five, embodiment
The stator double-winding asynchronous matrix type collecting electricity generation system that the present invention proposes is formed by connecting through the matrix form of series-parallel system (as shown in Figure 2) by several dual stator-winding induction electricity generation systems.Asynchronous motor power generation system of stator duplex winding as shown in Figure 3, the rotor of motor 1 also is common cage-type rotor, but stator has two cover windings, one cover is main winding, outwards transmit electrical power, output is connected to ac capacitor 5, rectifier 6 and filter capacitor 7 output constant voltage direct currents, another set of is excitation winding, be connected to pwm converter 2, electric capacity 3 and controller 4, provide required compensating reactive power electric current by pwm converter, adopt certain control strategy, can regulate the main winding output voltage effectively and keep constant.The progression of two cover stator winding is identical.Because two cover stator winding directly do not connect on electric, just by magnetic coupling, need not the needed isolation inductance of parallel asynchronous machine power generation system, have reduced the volume weight of system; Energized circuit does not have circuit to be connected with loop of power circuit in addition, is convenient to realize high performance of control.
One big advantage of this system is asynchronous generator when rotating speed and loading on changes in a big way, and the pwm converter Capacity Ratio generator rated capacity of supplying with reactive power is much smaller, thereby greatly reduces the cost of system.
Utilize this outstanding asynchronous motor power generation system of stator duplex winding to be the unit,, select suitable connected in electrical series branch road and parallel branch, form the matrix type collecting mode and outwards power according to the capacity and the output high pressure of marine wind electric field design.
The principle of selecting is: each unit leaves 10%～20% surplus at capacity and these two indexs of output voltage, so that adjust when fault is arranged.Design example: design a 20MW output voltage 5000V, the Oversea wind electric field of output current 4000A, each asynchronous motor power generation system of stator duplex winding unit is power output 720KW, output maximum voltage 600V, the output maximum current is 1200A.This marine wind electric field then utilizes four parallel branches, each 10 720KW of route, and the asynchronous generator unit of 600V is formed, be that whole matrix type collecting net is by 40 720KW, the asynchronous machine unit of 600V is formed, and it can outwards supply with 20MW, the direct current of 5000V.
Real-time running data to each unit, send into administrative center through isolation, administrative center manages whole matrix type collecting group's ruuning situation, in case it is unusual to find to have the individual elements operation to have, initiatively excise this element, and regulate other unit, and the output voltage of these unit is suitably raise, the result is that the global voltage of this series arm is constant; After the excision unit is repaired, reenter matrix group, the voltage of repairing the unit progressively rises from zero, and the output voltage of these other unit of series arm is progressively reduced, whole adjustment process keeps the branch road global voltage constant, and it is even finally to reach each unit output voltage of this series arm.
After the characteristics of this system are each units in series, can outwards carry the high-power direct current.Because its voltage height, direct current always, so transmission of electric energy again can adopt two thinner power transmission cables, is specially adapted to the area that three phase network does not reach, and cable laying is the occasion of difficulty, as the wind power plant of marine, grassland and depths, desert.
In addition, because each unit is to be connected into branch road and to be unified into the matrix type collecting system, therefore, although the direct voltage height that transmits, power is big, and the voltage of each unit is not high, and power is also little, is convenient to build.Particularly excitation winding and main electrical network do not have direct connection the on the circuit, and the control section of system such as pwm converter, controller etc. are all in the excitation winding side, the excitation system of each unit independently forms circuit, this guaranteed greatly the safety and health of system low the cost of system.
Claims (1)
1. the stator double-winding asynchronous matrix type collecting electricity generation system of an Oversea wind power generation field, it is characterized in that, with asynchronous motor power generation system of stator duplex winding as generator unit, and the output of this generator unit connected mutually, the generator unit of series connection constitutes the row of matrix type collecting system, with output of each row and be unified into row and constitute the outwards matrix type collecting electricity generation system of output high voltage direct current.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100411993A CN100385766C (en) | 2005-07-27 | 2005-07-27 | Stator double winding asynchronous electrical machine matrix type collecting and generating system of wind force generating field on the sea |
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| CNB2005100411993A CN100385766C (en) | 2005-07-27 | 2005-07-27 | Stator double winding asynchronous electrical machine matrix type collecting and generating system of wind force generating field on the sea |
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| CN100385766C true CN100385766C (en) | 2008-04-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376065C (en) * | 2006-07-07 | 2008-03-19 | 河海大学 | Wind power generating system based on direct current generator |
| CN101123352B (en) * | 2007-08-30 | 2010-09-29 | 中国科学院电工研究所 | Rear change converter of wind power generation system and its loop current control method |
| CN102305184A (en) * | 2011-08-16 | 2012-01-04 | 无锡航天万源新大力电机有限公司 | Cascade-type direct-drive wind generator |
| CN112290574B (en) * | 2020-09-18 | 2022-12-23 | 清华大学 | Current collector suitable for direct current collection and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09222071A (en) * | 1996-02-16 | 1997-08-26 | Sadao Ito | Wind power generation system |
| CN1633558A (en) * | 2002-02-16 | 2005-06-29 | 艾劳埃斯·乌本 | Offshore wind park |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09222071A (en) * | 1996-02-16 | 1997-08-26 | Sadao Ito | Wind power generation system |
| CN1633558A (en) * | 2002-02-16 | 2005-06-29 | 艾劳埃斯·乌本 | Offshore wind park |
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