CN102142733B - Flywheel energy storage motor device with variable power supply structure - Google Patents
Flywheel energy storage motor device with variable power supply structure Download PDFInfo
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- CN102142733B CN102142733B CN201010585589A CN201010585589A CN102142733B CN 102142733 B CN102142733 B CN 102142733B CN 201010585589 A CN201010585589 A CN 201010585589A CN 201010585589 A CN201010585589 A CN 201010585589A CN 102142733 B CN102142733 B CN 102142733B
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- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention provides a flywheel energy storage motor device with variable power supply structure, which mainly solves the technical problem of improving device reliability, lowering cost and the like. The flywheel energy storage motor device adopts the following technical scheme that the stator windings of the motor are a group of independent Y windings, wherein one winding is a reversible winding, and the rest windings are a first power-generation winding and a second power-generation winding; the reversible winding is respectively connected with a variable frequency drive unit or a first-phase rectifier and a third-phase rectifier by a bilateral switch; and the first power-generation winding and the second power-generation winding are respectively and correspondingly connected with a second-phase rectifier and a third-phase rectifier. When the motor device is motor-driven, a power supply and the reversible winding are conducted by the variable frequency drive unit and the bilateral switch, and the motor drives a flywheel to rotate and store energy. During power generation, the flywheel releases energy, each Y winding simultaneously generates power and operates, instantaneous high-power output is carried out by rectification and inversion, and the flywheel energy storage motor device is suitable for various devices.
Description
Technical field:
The present invention relates to a kind of system of storage of electrical energy, particularly a kind of engine with flywheel.
Background technology:
Flywheel energy storage dynamoelectric machine device is applied to need instantaneous high power load power supply occasion, as the land with peak load regulation network, large-sized gantry crane energy recuperation utilize again, the subway station energy recuperation utilizes or the like again; This dynamoelectric machine device has the dynamoelectric machine of three-phase winding construction, but the axle head of this three-phase winding dynamoelectric machine is connected with the flywheel assembly of a stored energy, and this three phase winding also is connected with the three-phase fully-controlled rectifier through bidirectional switch; This three-phase fully-controlled rectifier is connected with load through three-phase inverter, constitutes a flywheel energy storage dynamoelectric machine device, though above-mentioned three-phase winding construction motor is simple in structure; But its reliability is lower, breaks down as a winding is arranged in three phase windings, and whole device can't move; This phenomenon possibly lead to serious consequence in some emergent load occasions, and the rectifying device in the device all is to adopt high-power silicon controlled rectifier (IGBT); In high-power field; The price of power device is with being the exponential type relation between the capacity, along with the increase of single tube desired volume, its price sharply raises; Reliability reduces; And these high-capacity power devices, it is very expensive to control IGBT device price entirely, generally is not control more than 3 times of type power diode price with capacity.
Summary of the invention:
Technical problem to be solved by this invention is, provides a kind of improved electric power-feeding structure variable flywheel energy storage electric machine, and it can improve the reliability of flywheel energy storage electric machine, and can reduce the cost of whole power conversion system.
The technical scheme that the present invention solves the problems of the technologies described above employing is:
The variable flywheel energy storage electric machine of electric power-feeding structure; Include dynamoelectric machine, bidirectional switch, variable frequency drive unit, three-phase rectifier and the three-phase inverter of band flywheel; Be characterized in: the stator winding of dynamoelectric machine is one group of separate Y winding; It is reversible winding that described stator winding has a Y winding; All the other Y windings of this stator winding are the first and second generating windings, and this reversible winding is connected with first three-phase inverter or first three-phase rectifier of variable frequency drive unit respectively through bidirectional switch, and this first, second generating winding correspondence respectively is connected with second, third three-phase rectifier; The motoring condition power supply is connected reversible winding through the 4th three-phase rectifier of variable frequency drive unit and first three-phase inverter and bidirectional switch; The energy storage of driven by motor flywheel high speed rotating, the generating state flywheel releases energy, and each Y winding of stator winding is made generator operation simultaneously; And through each independently first, second does instantaneous high-power output with the 3rd rectifier and second three-phase inverter, form the electric power-feeding structure variset.
Dynamoelectric machine stator winding of the present invention is separate Y winding, breaks down like certain phase winding wherein, but the still derate operation of whole device; Obviously improve the reliability of device, the present invention when motoring condition, only reversible winding work; Polyphase machine moves with three phase electric machine, and its power total capacity is fallen greatly, and each composition capacity of variable frequency drive unit reduces; Can reduce equipment cost, motor stator winding is independent Y winding, and the rectifying device that is connected with it all adopts power diode; Compare with traditional structure, the average price of device can reduce greatly, has splendid economic benefit.
Description of drawings:
Fig. 1 is the variable flywheel energy storage electric machine of an electric power-feeding structure of the present invention sketch map.
Fig. 2 is Fig. 1 three-phase rectifier circuit theory diagrams.
Fig. 3 is a three-phase inverter circuitry schematic diagram among Fig. 1.
Embodiment:
With reference to Fig. 1, the variable flywheel energy storage electric machine of electric power-feeding structure includes stator winding 1, bidirectional switch 2, variable frequency drive unit 3, three-phase rectifier 4, flat wave capacitor 5 and the three-phase inverter 6 of dynamoelectric machine.
The stator winding 1 of dynamoelectric machine is to be made up of one group of (for n) separate Y winding; Wherein a cover Y winding is reversible winding 11; This reversible winding 11 is connected with bidirectional switch 2, and all the other (are n-1 cover Y winding) are the generating winding, the first generating winding 12 as shown in fig. 1, the second generating winding 13 ... Wherein the first generating winding 12 is connected with second three-phase rectifier 42; The second generating winding 13 is connected with the 3rd three-phase rectifier 43, when n＞3, each generate electricity winding and three-phase rectifier be connected can and the like;
Dynamoelectric machine is except that the said structure characteristics; Similar basically with prior art constructions; On the shaft extension of its rotor, flywheel assembly is installed; When dynamoelectric machine was in electronic operating state, rotor drove the flywheel high speed rotating, and flywheel will store a large amount of functions and can supply instantaneous high-power output required.
The structure fundamental sum prior art of variable frequency drive unit 3 is similar, includes first three-phase inverter 61 of the 4th three-phase rectifier 44, first flat wave capacitor 51 and the three-phase inverter 6 of three-phase rectifier 4; Wherein the 4th three-phase rectifier 44 is not for controlling the rectifier type rectifier; As shown in Figure 2, each rectifying device is a power diode, when needing the voltage of rapid adjustment first flat wave capacitor 51; Can adopt thyristor to replace power diode; Because the power diode price is merely equal capacity and controls 1/3 of device IGBT entirely, therefore, the technical measures that the present invention adopts can significantly reduce installation cost; First flat wave capacitor 51 of one flat wave capacitor 5 is connected in parallel on the output of the 4th three-phase rectifier 44, and this output is connected with first three-phase inverter 61 of a three-phase inverter 6; The circuit theory diagrams of first three-phase inverter 61 such as Fig. 3 are to adopt 2 classical flat IGBT fully controlled bridges, and be big or to harmonic requirement when comparatively strict when capacity; Can adopt three level structures; Because dynamoelectric machine is when motoring condition, only reversible winding 11 is worked, and other n-1 cover windings are unloaded; Polyphase machine moves as three phase electric machine; Its gross power is reduced to the 1/n of total capacity, and the IGBT capacity of corresponding first three-phase inverter 61 only needs the 1/n of traditional structure, thereby can further reduce installation cost.
Three-phase rectifier 4 like Fig. 1, shown in 2, includes the first, second, third and the 4th three- phase rectifier 41,42,43,44, and the 26S Proteasome Structure and Function of each three-phase rectifier is all same or similar with above-mentioned the 4th three-phase rectifier 44; Wherein an end of the input of first three-phase rectifier 41 and bidirectional switch 2 is connected; When this end is closed; The reversible winding 11 of first three-phase rectifier 41 and stator winding 1 is connected; Dynamoelectric machine is in the generator operation state, and the output of first three-phase rectifier 41 is connected with the output bus of device; Second three-phase rectifier 42, the first generating winding of its input and stator winding 1 is connected, and its output is connected with the device output bus; The 3rd three-phase rectifier 43, the 2nd generating winding of its input and stator winding 1 is connected, and its output is connected with the device output bus; When stator winding 1 consist of the separate Y winding of n the time, promptly have the three-phase rectifier of n-1 generating winding and correspondence to be connected.
Three-phase inverter 6; Like Fig. 1, shown in 3, include first three-phase inverter 61 and second three-phase inverter 62, the two 26S Proteasome Structure and Function is same or similar; First three-phase inverter, 61 inputs connect the 4th three-phase rectifier 44; Its output connects bidirectional switch 2, the second three-phase inverters 62 inputs and is connected in the device output bus, and its output connects load.
When the variable flywheel energy storage electric machine of electric power-feeding structure moves:
Motoring condition---power net electric power is converted into direct current through the 4th three-phase rectifier 44 of variable frequency drive unit 3; First flat wave capacitor, 51 filtering through flat wave capacitor 5; Be converted into the alternating current of frequency conversion then through first three-phase inverter 61 of three-phase inverter 6; To reversible winding 11 power supplies of the stator winding 1 of dynamoelectric machine, the motor high speed rotating also drives the flywheel high speed rotating on its rotor shaft extension thereupon, and it is required for instantaneous high-power output that flywheel can store a large amount of kinetic energy.
Generating state---electronic/engine is high speed rotating under flywheel drives; Bidirectional switch 2 is connected the reversible winding 11 and first three-phase rectifier 41; Whole frequency conversion rate alternating currents of producing of (n cover) Y winding; Each three-phase rectifier of warp correspondence is (as first, second, third ... The n three-phase rectifier) export same dc bus to, through second flat wave capacitor, 52 filtering of flat wave capacitor 5, second three-phase inverter 62 through three-phase inverter 6 is converted into powerful AC energy output then.
Claims (3)
1. variable flywheel energy storage electric machine of electric power-feeding structure; Include dynamoelectric machine, bidirectional switch, variable frequency drive unit, three-phase rectifier and the three-phase inverter of band flywheel; It is characterized in that: the stator winding of dynamoelectric machine (1) is one group of separate Y winding; It is reversible winding (11) that described stator winding (1) has a Y winding; All the other Y windings of this stator winding (1) are the first and second generating windings (12,12 '); This reversible winding (11) is connected with the three-phase inverter (61) or first three-phase rectifier (41) of variable frequency drive unit (3) respectively through bidirectional switch (2); This first, second generating winding (12,12 ') correspondence respectively is connected with second, third three-phase rectifier (42,43), and the motoring condition power supply is connected reversible winding (11), the energy storage of driven by motor flywheel high speed rotating through the 4th three-phase rectifier (44) of variable frequency drive unit (3) and first three-phase inverter (61) and bidirectional switch (2); The generating state flywheel releases energy; Each Y winding of stator winding (1) is made generator operation simultaneously, and does instantaneous high-power output through each separate first, second and the 3rd rectifier (41,42,43) and second three-phase inverter (62), formation electric power-feeding structure variset.
2. the variable flywheel energy storage electric machine of electric power-feeding structure according to claim 1 is characterized in that the first, second, third and the 4th rectifier (41,42,43,44) for not controlling the rectifier type rectifier, and each rectifying device is a power diode.
3. the variable flywheel energy storage electric machine of electric power-feeding structure according to claim 1 is characterized in that first and second inverters (61,62) are two level controllable silicon fully controlled bridges or three level structures.
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| CN102142733B true CN102142733B (en) | 2012-10-24 |
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| US20080271935A1 (en) * | 2007-05-03 | 2008-11-06 | Erkan Mese | Multiple winding electric machine |
| CN101764491B (en) * | 2008-12-24 | 2014-04-16 | 徐隆亚 | Megawatt grade brushless slip ring double-fed wind generator/motor and control method thereof |
| CN201869080U (en) * | 2010-12-10 | 2011-06-15 | 中国船舶重工集团公司第七〇四研究所 | Flywheel energy storage motor device with changeable power supply structure |
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Effective date of registration: 20151204 Address after: 200031 No. 10, Shanghai, Hengshan Road Patentee after: SHANGHAI CSIC SHIP PROPULSION EQUIPMENT CO., LTD. Address before: 200031 No. 10, Shanghai, Hengshan Road Patentee before: No.704 Research Institute, China Shipbuilding Heavy Industry Group Corporation |