CN104539206A - Offshore large direct-drive switch reluctance wind driven generator power converter and system thereof - Google Patents
Offshore large direct-drive switch reluctance wind driven generator power converter and system thereof Download PDFInfo
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- CN104539206A CN104539206A CN201410853077.3A CN201410853077A CN104539206A CN 104539206 A CN104539206 A CN 104539206A CN 201410853077 A CN201410853077 A CN 201410853077A CN 104539206 A CN104539206 A CN 104539206A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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Abstract
The invention provides an offshore large direct-drive switch reluctance wind driven generator power converter and a system of the converter. The converter is composed of a switch reluctance wind turbine, a power converter body, a DC/DC converter body and a system controller. The switch reluctance wind turbine is connected with the power converter body. The power converter body is connected with the DC/DC converter body. Output of the DC/DC converter body is connected with output of a DC/DC converter body of the other switch reluctance wind driven generator power converter system in series or parallel and then outputs electric energy to the shore through a direct-current submarine cable. The system controller is connected with the power converter body and connected with the DC/DC converter body. The switch reluctance wind turbine is connected with the system controller. According to the system, two-phase windings of a four-phase switch reluctance generator can work at the same time, exciting voltage is adjustable, the function of outputting direct-current voltage and adjusting boost can be achieved, the power density and the controllable flexibility are improved, and the power converter is suitable for the field of offshore large wind power plants.
Description
Technical field
The present invention relates to Oversea wind power generation field, be specifically related to that marine wind electric field is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof.
Background technology
Relative land wind energy, the advantage of wind energy on the sea is that wind speed is higher, wind-force is more lasting, and in China, the wind speed average specific land wind speed in open marine site wants high 30%-40%, and greater coasting area wants high 15%-20%, can the electric energy of multiple 50%-70% for generating electricity.
Although the exploitation of people to wind-powered electricity generation has ISUZU company, mainly concentrate on land, the experience of building Large Scale Offshore Wind Farm compares shortage; The major defect of offshore wind farm builds pylon in the seawater and the cost such as platform (maritime transformer station) and generating set installation is quite high, the cost of maintenance operation is also far above land, thus to Wind turbines and electric power transfer thereof efficient, stable, reliable request is higher, technically also has different Liquified gas tankers unsteady flow, transmission of electricity etc. are multinomial simultaneously.
In view of offshore wind farm development cost is far above land, the Wind Power Development initial stage at sea that reduces costs just becomes the important realistic problem that will face, although select more powerful generating set can save unit power investment, the increasing volume and weight of wind power system makes installation cost continue to rise; Simplified structure is a direction, as adopted the magneto alternator group of direct-driving type, eliminate gear box, but the manufacturing process of magneto alternator is complicated, cost is high, and Attention problems cost is higher, simultaneously along with the continuous increase of unit capacity, supporting big-power transducer is expensive further increases its use cost, and the application of high performance permanent magnetic material also makes the expensive of generator itself.
(Switched Reluctance Generator, is called for short: SRG) structure is simple switch reluctance generator, brushless on rotor, without winding, without permanent magnet; It is equivalent to a current source when running, and like this in certain range of speeds, output end voltage can not change along with the change of rotating speed, and this is very suitable for the wind energy conversion system of the variable-speed operation of current main-stream, can improve the utilization ratio of wind energy; The more important thing is that it directly sends as direct current, adapted to current offshore wind farm carries out electric power transfer trend needs in efficient direct current mode, eliminated rectification link; Due to these characteristics, switch reluctance generator can realize higher generating efficiency under wind-force Direct driver, thus eliminates gear box, makes whole power generation system structure more succinct, reliable, the development trend of this also wind generator system just; And in running, switch reluctance generator controllable parameter is many, as switching angle control, Current cut control, PWM control, can realize the control strategy of more complicated easily, control output dc voltage and electric current flexibly, also greatly reduce the technostress of low voltage crossing; Visible, switch reluctance generator introduces offshore wind farm, meet the needs installing the offshore wind farm development difficult, cost is high, maintaining is difficult completely, the i.e. high efficiency conversion realizing wind energy, the simplicity of structure means the maintenance that higher reliability is less and lower installation cost and equipment purchase cost.
The research and practice being used for large-scale wind power field about bulky switch reluctance generator is existing so far, wherein, patent: CN102223034B, large-scalely directly drive switching magnetic-resistance wind-driven generator and machine set system thereof, 2013.04.10, propose a kind of switch reluctance generator of inside and outside double-stator structure, improve the power density of switch reluctance generator, this is an important direction, namely the weight and volume under unit power reduces, power in other words under Unit Weight or volume increases, and is very suitable for the needs of offshore wind farm development.
Domestic and international research shows, adopt high voltage direct current (High-Voltage Direct Current, be called for short: mode transferring electric power HVDC) is the most convenient economical for offshore wind farm, but, if adopt traditional double-fed asynchronous or permanent-magnet synchronous AC generator, the AC transformer that mostly will be connected by every platform alternating current generating sets first boost to middle pressure, then focuses on maritime transformer station and converts direct current conveying to, connects AC network by after the inverter inversion of transformer station on the bank; Its complex structure, electric energy needs through the conversion repeatedly between AC and DC; And switch reluctance generator directly sends direct current, at least eliminate a rectification link.
As previously mentioned, since the existence of traditional marine wind electric field maritime transformer station adds its cost, could maritime transformer station be saved? this respect also has many research both at home and abroad in recent years: 1, Amir Parastar, Jul-Ki Seok.High-Power-Density Power ConversionSystems for HVDC-Connected Offshore Wind Farms [J] .Journal of PowerElectronics, 2013, 13 (5): 737-745.2, N.Holtsmark, H.J.Bahirat, M.Molinas, et al.An all-DCoffshore wind farm with series-connected turbines:An alternative to the classical parallel ACmodel.IEEE Trans.Ind.Electron, 2013, 60 (6): 2420-2428.3, Thanh Hai Nguyen, Dong-ChoonLee, Chan-Ki Kim.A Series-Connected Topology of a Diode Rectifier and a Voltage-Source Converterfor an HVDC Transmission System [J] .IEEE TRANSACTIONS ON POWER ELECTRONICS, 2014, 29 (4): 1579-1584.4, Etienne Veilleux, Peter W.Lehn.Interconnection of Direct-Drive Wind Turbines Using aSeries-Connected DC Grid [J] .IEEE TRANSACTIONS SUSTAINABLE ENERGY, 2014, 5 (1): 139-147.5, Li Xiang, Han Minxiao., offshore wind farm series connection multiterminal VSC-HVDC coordination control strategy [J]. electrotechnics journal, 2013, 28 (5): 42-48, 57. etc., they focus on the research and practice of direct current wind energy turbine set topological structure and control aspect thereof, obtain DC high voltage after all unit connection in series-parallel of wind field and be transferred to transformer station on the bank, but, they are mostly for magneto alternator.
Switch reluctance generator is due to the galvanic feature of its direct output ripple, be different from other main flow wind-driven generators completely, so its power inverter part also more difference, in the research and practice of switch reluctance generator power inverter, mostly for the power inverter of middle low power grade, but also there is certain reference, the power inverter main circuit of current switch reluctance generator adopts asymmetrical half-bridge formula structure mostly, but its structure is comparatively complicated, electric component used is too much, document: Peng Hanmei, easy glossy ganoderma etc. the simple and easy power inverter under switch reluctance generator separate excitation pattern controls [J]. solar energy journal, 2012, 33 (8). propose a kind of power inverter main circuit structure of easy structure, there is important practical value, but, it can only the work of any instantaneous guarantee one phase winding.
Excitation and two stages of generating are divided in the switch reluctance generator course of work, and be that timesharing is carried out, excitation mode is divided into again separate excitation and self-excitation mode, be conducive to winding current when improving follow-up afterflow generating in view of improving exciting voltage and then improve power output, changing traditional exciting voltage can not the problem of on-line control, occur that some can according to the novel power inverter excitation part circuit structure of control system demand on-line tuning excitation input voltage in recent years, as: 1, Peng Hanmei, easy glossy ganoderma etc. based on the switch reluctance generator novel excitation pattern [J] of Buck converter. solar energy journal, 2012, , 33 (3) .2, Duan Lihua. based on the research [J] of the offshore drilling platform wind generator system hardware configuration of change generating voltage power inverter. ship power technology, 2012, 32 (2). the strong development facilitating switch reluctance generator power converter system, but they are generally under the occasion of middle low power.
In addition, as above these are in the research and practice of the power converter system of switch reluctance generator, all suppose any instantaneous situation only having a phase winding energising of switch reluctance generator, and in the research and practice of switched reluctance motor, occurred the two-phase winding of polyphase windings switched reluctance motor be energized simultaneously run example, the favourable fluctuation reducing electric parameter and torque pulsation, and improve power density, so, whether can the switch reluctance generator that operation principle is different with it also work simultaneously and improves its performance, and by two-phase winding?
Summary of the invention
According to above background technology, the present invention proposes a kind of satisfied four phase winding high power switch reluctance generator power inverter main circuits simultaneously having two phase windings energisings, exciting voltage is adjustable, export through the adjustable system of DC/DC converter boost, structure simple-to-maintain is easy, two phase windings coordinate can improve its power output with suitable control mode, increases its power density and reduces electric current and voltage pulsation, promotes the requirement reducing costs, improve rate of return on investment in offshore wind farm development.
Technical scheme of the present invention is:
Sea is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof, by switching magnetic-resistance wind energy conversion system 1, power inverter 2, DC/DC converter 3, system controller 4 forms, it is characterized in that, described switching magnetic-resistance wind energy conversion system 1 interconnects with described power inverter 2, power inverter 2 connects described DC/DC converter 3, DC/DC converter 3 exports and exports electric energy ashore through direct current submarine cable after exporting serial or parallel connection with the DC/DC converter 3 of other switching magnetic-resistance wind-driven generator power converter systems, described system controller 4 interconnects with power inverter 2, and be connected with DC/DC converter 3, switching magnetic-resistance wind energy conversion system 1 is connected system controller 4 also.
Described switching magnetic-resistance wind energy conversion system 1 is made up of the switch reluctance generator of wind energy conversion system, large-scale four phase windings of MW level and stator 40 pole and rotor 30 pole, checkout gear, wherein, coaxially directly drive between the switch reluctance generator of described wind energy conversion system and large-scale four phase windings of described MW level and stator 40 pole and rotor 30 pole, checkout gear mainly contains air velocity transducer, wind energy conversion system rotating speed and switch magnetoresistance motor rotor position transducer.
Described power inverter 2, core is power inverter main circuit, is made up of power generating source part and field power supply part, power generating source part is by six electronic power switch pipe V1-V6, six Power Diode Pumped D1-D6, first electrolytic capacitor C1 forms, first Power Diode Pumped D1 connects with the second electronic power switch pipe V2 from top to bottom, the two polarity in the same way, first electronic power switch pipe V1 connects with the second Power Diode Pumped D2 from top to bottom, the two polarity in the same way, 3rd Power Diode Pumped D3 and the 3rd electronic power switch pipe V3 connects from top to bottom, the two polarity in the same way, in above three groups of series arms, the most front and last two branch road same polarities are connected in parallel, middle series arm negative polarity end is connected with the negative pole end of aforementioned two parallel branches, article three, between branch road, Article 1 and the first-phase winding A of the intermediate contact place connecting valve reluctance generator of Article 2, the second-phase winding B of the intermediate contact place connecting valve reluctance generator of Article 2 and Article 3, it is more than the main circuit part that first-phase winding A is connected with second-phase winding B, third phase winding C is the same with the former with the connection of the 4th phase winding D, use the four to the six electronic power switch pipe V4-V6, four to the six Power Diode Pumped D4-D6 is formed, this part main circuit and the former A, the main circuit same polarity of B two phase winding is connected in parallel, simultaneously, the series arm i.e. first electronic power switch pipe V1 of respective centre is connected with the positive terminal of the 4th electronic power switch pipe V4, first electrolytic capacitor C1 exports to DC/DC converter 3 after being connected across the 6th diode D6 and the 6th electronic power switch pipe V6 series arm two ends, output herein is also the input of field power supply part, therefore, the electric energy of field power supply part comes from the electric energy that switch reluctance generator exports through power inverter power generating source part main circuit, utilization possesses isolation, transformation, adapt to the main circuit of forward converter as field power supply part of relatively high power grade, it is by three-winding first transformer T1, eight to the ten Power Diode Pumped D8-D10, second electrolytic capacitor C2 and the 3rd electrolytic capacitor C3, first reactor L1, 7th electronic power switch pipe V7 forms, the duty ratio of the 7th electronic power switch pipe V7 is directly proportional to this excitation power circuit and forward converter output voltage, the positive terminal of the aforementioned first electronic power switch pipe V1 of positive pole termination that this field power supply part exports and the 4th electronic power switch pipe V4, the negative pole end of negative pole termination aforementioned power converter power generating source part main circuit, in addition, also has the branch road that the 7th Power Diode Pumped D7 connects with storage battery X same polarity, the positive terminal of the positive terminal that its upper positive and field power supply part export i.e. the first electronic power switch pipe V1 and the 4th electronic power switch pipe V4 is connected, the negative pole end that its underpart negative pole and field power supply part export and power generating source part negative pole end are connected, the voltage of storage battery X is significantly less than field power supply part output voltage, only used as phase winding initial excitation when system works of the present invention is initial.
The switch reluctance generator of large-scale four phase windings of described MW level and stator 40 pole and rotor 30 pole, in it, namely external stator 40 pole have 40 cover windings, often overlap winding be divided into relative internal stator and external stator winding and connect, every 10 cover windings in series are a phase, and each cover winding is symmetrical along generator even circumferential; Described first-phase winding A and second-phase winding B is adjacent with the 4th phase winding D, and third phase winding C and second-phase winding B is adjacent with the 4th phase winding D; When switch reluctance generator runs, by the on-off action of each electronic power switch pipe V1-V8 and Power Diode Pumped D1-D8, control any instantaneous have in two phase windings in four phase windings there is electric current, and according to the sequential loop of AB → BC → CD → DA → AB, each travel angle is 3 °, every phase winding generate electricity after being divided into first excitation account for 3 ° namely operating angle be 6 °; Be specially: the branch road afterflow generating that the magnetic energy that first-phase winding A stores forms through the first Power Diode Pumped D1 and the second Power Diode Pumped D2, now the 4th electronic power switch pipe V4 and the 5th electronic power switch pipe V5 closure state, then second-phase winding B is powered excitation, i.e. AB stage by the field power supply part main circuit of power inverter 2 main circuit; After rotor turns over 3 °, first-phase winding A electric current is down to zero, 4th electronic power switch pipe V4 and the 5th electronic power switch pipe V5 disconnects and makes second-phase winding B enter power generating stage by the 4th Power Diode Pumped D4 and the 5th Power Diode Pumped D5 afterflow simultaneously, and the first electronic power switch pipe V1 and the 3rd electronic power switch pipe V3 closes third phase winding C and enters the excitation stage, namely enters the BC stage; Next be corresponding CD, then DA, and then the reciprocal AB stage, so repeatedly; Needed for all winding excitations, energy source is all identical.
Described DC/DC converter 3, adopt straight-friendship-straight mapped structure, interstage exchange district is the second transformer T2 of high frequency boosting, input side is by the 4th electrolytic capacitor C4, four electronic power switch pipe V8-V11 form, 4th electrolytic capacitor C4 is connected across input two interpolar, four electronic power switch pipe V8-V11 form bridge inverter main circuit subsequently, output AC electricity connects the input two ends of the second transformer T2 of high frequency boosting, the output of the second transformer T2 connects the bridge rectifier be made up of four electronic power switch pipe V12-V15, in the two ends that rectification exports, positive polarity line is connected in series the second reactor L2, then positive and negative two ends cross-over connection the 5th electrolytic capacitor C5 subsequently exports electric energy.
The above whole electronic power switch pipe is IGBT.
Described system controller 4 take High Performance DSP as acp chip, integrated treatment wind speed, switch reluctance generator rotor-position, phase winding voltage current signal, wind energy turbine set DC bus-bar voltage current signal and demand for control signal, and produce activation bit to power inverter 2 and DC/DC converter 3.
Technique effect of the present invention mainly contains:
The structure of power inverter 2 main circuit, can realize two phase windings and work simultaneously:
1, because of another phase winding generating during a phase winding excitation, there is winding to generate electricity in real time and export, thus increase the mean value of output voltage and electric current, improve the power density of generator;
2, compare asymmetrical half-bridge formula main circuit and save electric component quantity, this is also considerable in large-power occasions;
3, generating exports continuous and stable, reduces under traditional single phase winding mode of operation because exporting without generating electric energy the larger voltage and current pulsating quantity produced during excitation; Switching magnetic-resistance wind-driven generator is directly driven owing to belonging to, rotating speed is lower, and single-phase winding mode of operation electricity is pulsed clearly, also for filtering brings larger pressure, so two phase windings replace excitation and generating ensures that the electric current and voltage of power generation circuit is comparatively steadily beneficial to filtering simultaneously, this point also has much meaning.
The use of forward converter, improves the controllability of exciting voltage, makes contributions further, and adopt this half self-excitation mode for improving power output, and relatively simple separate excitation mode, without the need to the outfit of special high-power battery, also reduces maintenance cost; To encourage oneself relatively merely mode, inhibit main circuit to export excessive voltage and current pulsation problem; In addition, the chopper circuit of relatively existing employing non-isolation type, as the pattern regulating exciting voltage, is more conducive to the protection of system.
The inversion of DC/DC converter 3 and rectification side, each electronic power switch pipe is IGBT, enhance controllability flexibility, more calmly aobvious when tackling grid side fault, high frequency transformer used reduces volume weight, can hold in the pylon being installed to respective Wind turbines, thousands of volt or tens of Kilovolt Direct Current pressure is reached after boosting, connection in series-parallel again in wind field between each unit forms higher voltage, then connects transformer station on the bank through submarine cable, eliminates the setting of maritime transformer station; If offshore wind farms, then through DC/DC converter 3, each unit exports that directly the direct current by thousands of volt or tens of kilovolts in parallel is connected to through submarine cable is also a kind of selection on the bank; Distance is far away on the bank, and required series connection unit number is more, because the longer required voltage of circuit is higher.
Accompanying drawing explanation
Figure 1 shows that easy structure figure of the present invention.
Figure 2 shows that switch reluctance generator profile of the present invention.
Figure 3 shows that switch reluctance generator stator winding inductance of the present invention and rotor position angle graph of a relation.
Figure 4 shows that power inverter main circuit diagram of the present invention.
Figure 5 shows that DC/DC inverter main circuit figure of the present invention.
In figure: 1, switching magnetic-resistance wind energy conversion system, 2, power inverter, 3, DC/DC converter, 4, system controller, 5, external stator salient pole, 6, external stator winding, 7, rotor, 8, internal stator salient pole, 9, internal stator winding.
Embodiment
Accompanying drawing 1 is structure diagram of the present invention, switching magnetic-resistance wind energy conversion system 1 comprises switch reluctance generator, the checkout gear of wind energy conversion system, large-scale four phase windings of MW level and stator 40 pole and rotor 30 pole, wherein, coaxially directly drive between wind energy conversion system and switch reluctance generator, checkout gear mainly contains air velocity transducer, wind energy conversion system rotating speed and switch magnetoresistance motor rotor position transducer.
Fig. 2 is the profile of the present invention's switch reluctance generator used, there is inside and outside bimorph transducer, external stator salient pole 5 and internal stator salient pole 8 respectively have uniform 40 along respective inside and outside circumference, around being provided with winding on each salient pole, i.e. external stator winding 6 and internal stator winding 9, the windings in series of the inside and outside stator poles of arbitrary radial co-located, composition one phase winding and circumferentially distribute symmetrically 10 such poles are connected in series together, 40 poles then form four phase windings, be respectively A, B, C, D phase winding by adjacent sequential, shared by all stator salient poles and groove, angle is equal; Rotor 7 along its inside and outside relatively between external stator and internal stator by salient pole and groove composition, uniform is 30 salient poles, inside and outside salient pole width and angle equal.
Stator and rotor sructure situation according to Fig. 2, when Fig. 3 delineates certain rotor relative position difference, the situation of change of stator winding inductance, abscissa is angle θ, ordinate is electronics winding inductance L, the origin of coordinates is stator salient poles and rotor recesses center line overlapping positions i.e. 0 degree of point separately, and now inductance is minimum value L
min, along with rotor movement, when inductance rises, if now pass to electric current in corresponding stator winding, this is the region that switched reluctance motor produces forward electrokinetic moment, until as shown in Figure 36 ° is reach inductance maximum L
max, from here to the interval shown in 12 °, especially in middle inductor decline region, then opposing torque can be produced when passing to electric current, if now by the rotor of external force active rotation switched reluctance machines, then can first produce Magnetic Energy Storage in inductive coils, and along with suitable route afterflow output electric energy, reach the effect that generating exports, but when 6 ° of positions, need first initiatively to pass to exciting current and set up opposing torque, then along with external force active rotation just has the realization that follow-up Magnetic Energy Storage and afterflow export, so, in general, exciting current is passed to by external power source time about 6 as shown in Figure 3 °, until close field power supply when about 9 °, and this winding freewheeling path is provided, namely generate electricity output, export being converted into electric energy by the magnetic energy of changes mechanical energy, realize generating, exciting current is less than generating output current, otherwise this switch reluctance generator will quit work.
And then, power inverter 2 main circuit shown in Fig. 4 is then the excitation of specific implementation to phase winding and the circuit of generating, and particularly, this power inverter main circuit can realize two phase winding work simultaneously, and excitation of partly encouraging oneself, and lower mask body DETAILS SECTIONExample is as follows:
As shown in Figure 4, when the initial work of system, first worked by storage battery X, through the 7th Power Diode Pumped D7 as field power supply, suppose that initial period is according to rotor position, second-phase winding B place stator salient poles overlaps with rotor with salient pole center line, then the 4th electronic power switch pipe V4 and the 5th electronic power switch pipe V5 that control second-phase winding B excitation close excitation, and the exciting current of storage battery X Voltage Establishment second-phase winding B also increases, after rotating past about 3 °, turn off the 4th electronic power switch pipe V4 and the 5th electronic power switch pipe V5, the magnetic energy that then now stores in second-phase winding B will export electric energy along the 4th Power Diode Pumped D4 and the 5th Power Diode Pumped D5 afterflow, note now, turn to according to rotor, there is the position that its stator salient poles corresponding overlaps with rotor with salient pole center line in its adjacent first-phase winding A or third phase winding C, be assumed to be third phase winding C, now structure according to Fig. 4, the first electronic power switch pipe V1 and the 3rd electronic power switch pipe V3 can be closed completely to third phase winding C excitation, that is, within the scope of 3 ° of about rotation after this, that second-phase winding B afterflow generating and this double winding of third phase winding C excitation work simultaneously, output voltage is established due to after this, and supported by the first electrolytic capacitor C1, its magnitude of voltage obviously should be greater than the voltage of storage battery X under wind energy conversion system certain speed meeting, because of the effect of the 7th Power Diode Pumped D7, storage battery will be stopped power supply work after this, as above BC winding works after about 3 ° simultaneously, in second-phase winding B, generation current must control its stopping with the motoring condition preventing from entering power consumption, the the first electronic power switch pipe V1 and the 3rd electronic power switch pipe V3 that now control third phase winding C excitation disconnect and are generated electricity by the second Power Diode Pumped D2 and the 3rd Power Diode Pumped D3 afterflow, 4th phase winding D place stator salient poles overlaps with rotor with salient pole center line and has possessed excitation condition simultaneously, so third phase winding C excitation closes the 4th electronic power switch pipe V4 and the 6th electronic power switch pipe V6 to the 4th phase winding D excitation while forwarding electricity, this stage is CD winding working stage simultaneously, next, similarly, be that DA winding works simultaneously, then AB, subsequently gets back to BC again, control and so forth, work,
And except mentioning above and being powered by storage battery X excitation when initial, follow-up excitation is born by field power supply part main circuit as shown in Figure 4, generating output is taken from its input, complete through forward converter, its course of work is: after the 7th electronic power switch pipe V7 is closed, the voltage at a winding two ends of the first transformer T1 is upper just lower negative, the winding b both end voltage be coupled with it is also upper just lower negative, therefore the 9th Power Diode Pumped D9 is in on-state, tenth Power Diode Pumped D10 is in off-state, the electric current of the first reactor L1 increases gradually, treat that the 7th electronic power switch pipe V7 closes to have no progeny, first reactor L1 is by the tenth Power Diode Pumped D10 afterflow, 9th Power Diode Pumped D9 turns off, electric current in first reactor L1 declines gradually, the exciting current that 7th electronic power switch pipe V7 closes the first transformer T1 that has no progeny flows back to input through c winding and the 8th Power Diode Pumped D8, before next order seven electronic power switch pipe V7 open, the electric current of c winding and the 8th Power Diode Pumped D8 branch road need drop to zero, the effect of the second electrolytic capacitor C2 and the 3rd electrolytic capacitor C4 is similar, plays the effect of filtering and voltage support, by above process, can obtain
the number of turn is fixing, if but under being pwm pattern to the 7th electronic power switch pipe V7, its service time i.e. its duty ratio is controlled by system controller 4, that is, the exciting voltage of output can need according to maximum power control and regulate.
Figure 5 shows that DC/DC converter 3 main circuit, he receives the direct current from power inverter 2 output and is isolated, raise and export again, left side is input, first through the 4th electrolytic capacitor C4 filtering and voltage support, its course of work is: the 8th electronic power switch pipe V8 and the 11 electronic power switch pipe V11 mono-group, 9th electronic power switch pipe V9 and the tenth electronic power switch pipe V10 mono-group, two groups of alternations, the alternating current of the relative high frequency that inversion goes out enters the d winding of the second transformer T2, the number of turn of e winding is more than d umber of turn, realize boosting, then through the rectifier circuit rectifies of four electronic power switch pipe compositions, wherein the 12 electronic power switch pipe V12 and the 15 electronic power switch pipe V15 mono-group, 13 electronic power switch pipe V13 and the 14 electronic power switch pipe V14 mono-group, alternation, also adjustable output dc voltage size within the specific limits herein, export through the second reactor L2 and the 5th electrolytic capacitor C5 filtering again.
Claims (7)
1. sea is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof, by switching magnetic-resistance wind energy conversion system (1), power inverter (2), DC/DC converter (3), system controller (4) forms, it is characterized in that, described switching magnetic-resistance wind energy conversion system (1) and described power inverter (2) interconnect, DC/DC converter (3) described in power inverter (2) connects, DC/DC converter (3) exports and exports electric energy ashore through direct current submarine cable after exporting serial or parallel connection with the DC/DC converter (3) of other switching magnetic-resistance wind-driven generator power converter systems, described system controller (4) and power inverter (2) interconnect, and be connected with DC/DC converter (3), switching magnetic-resistance wind energy conversion system (1) is connected system controller (4) also.
2. sea according to claim 1 is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof, it is characterized in that, described switching magnetic-resistance wind energy conversion system (1) is made up of the switch reluctance generator of wind energy conversion system, large-scale four phase windings of MW level and stator 40 pole and rotor 30 pole, checkout gear, wherein, coaxially directly drive between the switch reluctance generator of described wind energy conversion system and large-scale four phase windings of described MW level and stator 40 pole and rotor 30 pole, checkout gear mainly contains air velocity transducer, wind energy conversion system rotating speed and switch magnetoresistance motor rotor position transducer.
3. sea according to claim 1 is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof, it is characterized in that, described power inverter (2), core is power inverter main circuit, is made up of power generating source part and field power supply part, described power generating source part is by six electronic power switch pipes (V1-V6), six Power Diode Pumped (D1-D6), first electrolytic capacitor (C1) forms, first Power Diode Pumped (D1) is connected with the second electronic power switch pipe (V2) from top to bottom, the two polarity in the same way, first electronic power switch pipe (V1) is connected with the second Power Diode Pumped (D2) from top to bottom, the two polarity in the same way, 3rd Power Diode Pumped (D3) and the series connection of the 3rd electronic power switch pipe (V3) from top to bottom, the two polarity in the same way, in above three groups of series arms, the most front and last two branch road same polarities are connected in parallel, middle series arm negative polarity end is connected with the negative pole end of aforementioned two parallel branches, article three, between branch road, Article 1 and the first-phase winding A of the intermediate contact place connecting valve reluctance generator of Article 2, the second-phase winding B of the intermediate contact place connecting valve reluctance generator of Article 2 and Article 3, it is more than the main circuit part that first-phase winding A is connected with second-phase winding B, third phase winding C is the same with the former with the connection of the 4th phase winding D, use the four to the six electronic power switch pipe (V4-V6), four to the six Power Diode Pumped (D4-D6) is formed, this part main circuit and the former A, the main circuit same polarity of B two phase winding is connected in parallel, simultaneously, the series arm i.e. first electronic power switch pipe (V1) of respective centre is connected with the positive terminal of the 4th electronic power switch pipe (V4), first electrolytic capacitor (C1) exports to DC/DC converter (3) after being connected across the 6th diode (D6) and the 6th electronic power switch pipe (V6) series arm two ends, output herein is also the input of field power supply part, therefore, the electric energy of field power supply part comes from the electric energy that switch reluctance generator exports through power inverter power generating source part main circuit, utilization possesses isolation, transformation, adapt to the main circuit of forward converter as field power supply part of relatively high power grade, it is by three-winding first transformer (T1), eight to the ten Power Diode Pumped (D8-D10), second electrolytic capacitor (C2) and the 3rd electrolytic capacitor (C3), first reactor (L1), 7th electronic power switch pipe (V7) composition, the duty ratio of the 7th electronic power switch pipe (V7) is directly proportional to this excitation power circuit and forward converter output voltage, the positive terminal of the aforementioned first electronic power switch pipe (V1) of positive pole termination that this field power supply part exports and the 4th electronic power switch pipe (V4), the negative pole end of negative pole termination aforementioned power converter power generating source part main circuit, in addition, also has the branch road that the 7th Power Diode Pumped (D7) is connected with storage battery (X) same polarity, the positive terminal that its upper positive and field power supply part export the i.e. positive terminal of the first electronic power switch pipe (V1) and the 4th electronic power switch pipe (V4) is connected, the negative pole end that its underpart negative pole and field power supply part export and power generating source part negative pole end are connected, the voltage of storage battery (X) is significantly less than field power supply part output voltage, only used as phase winding initial excitation when system works of the present invention is initial.
4. switching magnetic-resistance wind energy conversion system (1) according to claim 2, it is characterized in that, the switch reluctance generator of large-scale four phase windings of described MW level and stator 40 pole and rotor 30 pole, in it, namely external stator 40 pole have 40 cover windings, often overlap winding be divided into relative internal stator and external stator winding and connect, every 10 cover windings in series are a phase, and each cover winding is symmetrical along generator even circumferential; Described first-phase winding A and second-phase winding B is adjacent with the 4th phase winding D, and third phase winding C and second-phase winding B is adjacent with the 4th phase winding D; When switch reluctance generator runs, by the on-off action of each electronic power switch pipe (V1-V8) and Power Diode Pumped (D1-D8), control any instantaneous have in two phase windings in four phase windings there is electric current, and according to the sequential loop of AB → BC → CD → DA → AB, each travel angle is 3 °, every phase winding generate electricity after being divided into first excitation account for 3 ° namely operating angle be 6 °; Be specially: the branch road afterflow generating that the magnetic energy that first-phase winding A stores forms through the first Power Diode Pumped (D1) and the second Power Diode Pumped (D2), now the 4th electronic power switch pipe (V4) and the 5th electronic power switch pipe (V5) closure state, then second-phase winding B is powered excitation, i.e. AB stage by the field power supply part main circuit of power inverter (2) main circuit; After rotor turns over 3 °, first-phase winding A electric current is down to zero, 4th electronic power switch pipe (V4) and the 5th electronic power switch pipe (V5) disconnect and make second-phase winding B enter power generating stage by the 4th Power Diode Pumped (D4) and the 5th Power Diode Pumped (D5) afterflow simultaneously, and the first electronic power switch pipe (V1) and the closed third phase winding C of the 3rd electronic power switch pipe (V3) enter the excitation stage, namely enter the BC stage; Next be corresponding CD, then DA, and then the reciprocal AB stage, so repeatedly; In operation, needed for all winding excitations, energy source is all identical.
5. sea according to claim 1 is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof, it is characterized in that, described DC/DC converter (3), adopt straight-friendship-straight mapped structure, interstage exchange district is second transformer (T2) of high frequency boosting, input side is by the 4th electrolytic capacitor (C4), four electronic power switch pipe (V8-V11) compositions, 4th electrolytic capacitor (C4) is connected across input two interpolar, four electronic power switch pipes (V8-V11) form bridge inverter main circuit subsequently, output AC electricity connects the input two ends of second transformer (T2) of high frequency boosting, the output of the second transformer (T2) connects the bridge rectifier be made up of four electronic power switch pipes (V12-V15), in the two ends that rectification exports, positive polarity line is connected in series the second reactor (L2), then positive and negative two ends cross-over connection the 5th electrolytic capacitor (C5) subsequently exports electric energy.
6. the content according to above each claim, is characterized in that, the above whole electronic power switch pipe is IGBT.
7. sea according to claim 1 is large-scale directly drives switching magnetic-resistance wind-driven generator power inverter and system thereof, it is characterized in that, described system controller (4) take High Performance DSP as acp chip, integrated treatment wind speed, switch reluctance generator rotor-position, phase winding voltage current signal, wind energy turbine set DC bus-bar voltage current signal and demand for control signal, and produce activation bit to power inverter (2) and DC/DC converter (3).
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| CN110011505A (en) * | 2019-05-06 | 2019-07-12 | 河北科技大学 | Dual stator wind power machine |
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| CN104953902B (en) * | 2015-06-11 | 2018-06-19 | 南京普天大唐信息电子有限公司 | A kind of switched reluctance machines power control circuit |
| CN105162371A (en) * | 2015-10-09 | 2015-12-16 | 武汉市深蓝动力科技有限公司 | Motor drive system and method for inhibiting torque pulsation of switch reluctance motor |
| CN107359782A (en) * | 2017-07-06 | 2017-11-17 | 中国计量大学 | Small-power three-phase alternating-current switch reluctance generator/motor current transformer |
| CN107359782B (en) * | 2017-07-06 | 2019-05-07 | 中国计量大学 | Small-power three-phase alternating-current switch reluctance generator/motor current transformer |
| CN109742876A (en) * | 2019-03-05 | 2019-05-10 | 欣盛尚驰科技股份有限公司 | A kind of six phase switch reluctance motor driven systems |
| CN110011505A (en) * | 2019-05-06 | 2019-07-12 | 河北科技大学 | Dual stator wind power machine |
| CN110212827A (en) * | 2019-06-12 | 2019-09-06 | 中国计量大学 | A kind of switch reluctance generator converter system |
| CN110474582A (en) * | 2019-08-20 | 2019-11-19 | 中国计量大学 | Reversed polarity goes straight up to pressure self-excitation and becomes field switch reluctance generator converter system |
| CN111313795A (en) * | 2020-03-12 | 2020-06-19 | 蚌埠学院 | Torque ripple suppression system and method for switched reluctance motor |
| CN113422486A (en) * | 2021-06-28 | 2021-09-21 | 南京工程学院 | Double-channel magnetic suspension switch reluctance fault-tolerant motor |
| CN113783498A (en) * | 2021-09-15 | 2021-12-10 | 中国矿业大学 | Novel double-stator switched reluctance motor integrated charging function driving converter |
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