CN102508160A - Synchronous generator and full-power converter testing system - Google Patents
Synchronous generator and full-power converter testing system Download PDFInfo
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- CN102508160A CN102508160A CN2011103712339A CN201110371233A CN102508160A CN 102508160 A CN102508160 A CN 102508160A CN 2011103712339 A CN2011103712339 A CN 2011103712339A CN 201110371233 A CN201110371233 A CN 201110371233A CN 102508160 A CN102508160 A CN 102508160A
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Abstract
The invention discloses a synchronous generator and full-power converter testing system which comprises a synchronous generator, a full-power converter and a grid connected transformer. One end of the full-power converter is connected with a power grid through the grid connected transformer and the other end of the full-power converter is connected with the synchronous generator. The full-power converter comprises at least two sub converters. The synchronous generator comprises at least two sets of stator windings. One or a plurality of sub converters of the full-power converter control the corresponding sets of stator windings of the synchronous generator to work in an electric motor mode and the rotating speed of the synchronous generator is kept, so that the conversion from the electric energy to the mechanical energy is realized; and other sub converters of the full-power converter respectively control the corresponding sets of stator windings of the synchronous generator to work in a generator mode, so that the conversion from the mechanical energy to the electric energy is realized. For the device, under the condition of not influencing the function test and the full-load examination requirements, the investment cost of equipment and the requirement for occupying the field are reduced, the test energy consumption of the system is reduced and the reliability of the system is improved.
Description
Technical field
The present invention relates to a kind of electrical test system, especially relate to a kind of aerogenerator dispatch from the factory many windings of the stator synchronous generator and full power convertor pilot system of test of being applicable to.
Background technology
In wind power generating set, synchronous generator needs through full power convertor electric energy to be sent to electrical network.At present, the stator output form of synchronous generator mainly contains two kinds: the output of single cover winding and the output of many cover windings, every cover winding three-phase (or heterogeneous) output.Along with the continuous increase of wind-power electricity generation complete machine capacity, the synchronous generator capacity requirement also constantly increases, and synchronous generator stator will be more prone to adopt many winding configurations.
In present wind electric converter exploitation and delivery test process, need set up the ground experiment platform, the function of current transformer is comprehensively tested, accomplish function test at full capacity.The test of wind electric converter should with the electric condition of real work equivalence under carry out.In the prior art, the normally used pilot system scheme of full power convertor that drives stator double winding or many windings synchronous generator is shown in accompanying drawing 1.This pilot system is an energy feedback system; Pilot system can drag unit by prime mover and (isolate adapter transformer by prime mover side; Prime mover driven current transformer and prime mover are formed, the simulation fan characteristic), synchronous generator, full power convertor, generating pusher side isolate adapter transformer, external electrical network and PC control platform and relevant controller switching equipment composition.During test; Control desk is coordinated the action of prime mover driven current transformer and full power convertor; Start prime mover by the prime mover driven current transformer and move, prime mover drags the synchronous generator running, and the electric energy of synchronous generator is through being fed back to electrical network by examination full power convertor and isolation adapter transformer.
The shortcoming of existing full power convertor pilot system scheme is: need two motors (is synchronous generator, and is prime mover), the current transformer of a driving prime mover needs shaft coupling between prime mover and generator.Therefore set up such ground experiment platform, the equipment that needs is many, and the occupation of land space is big; System's operational reliability is low, and equipment investment cost is big, because the mechanical loss of many prime mover and the loss of prime mover current transformer; Though system is an energy feedback system, energy consumption is still not little.
Summary of the invention
The purpose of this invention is to provide a kind of synchronous generator and full power convertor pilot system; Under the situation that does not influence function test and fully loaded examination demand; Reduce equipment investment cost and reduce the system test power consumption, reduce the place simultaneously and take demand and improve system reliability.
In order to realize the foregoing invention purpose; The present invention specifically provides the technic relization scheme of a kind of synchronous generator and full power convertor pilot system; A kind of synchronous generator and full power convertor pilot system comprise: synchronous generator, full power convertor and the transformer that is incorporated into the power networks, and an end of full power convertor links to each other with electrical network through the transformer that is incorporated into the power networks; The other end of full power convertor links to each other with synchronous generator; Full power convertor comprises two or more sub-current transformers, and synchronous generator comprises two covers or the above stator winding of two covers, and the one or more sub-current transformer of full power convertor is controlled the corresponding cover stator winding of synchronous generator respectively and worked in electric motor mode; Keep the rotating speed of synchronous generator, realize the conversion of electric energy to mechanical energy; The sub-current transformer of other of full power convertor is controlled the corresponding cover stator winding of synchronous generator respectively and is worked in generator mode, realizes the conversion of mechanical energy to electric energy.
As the further improvement of a kind of synchronous generator of the present invention and full power convertor pilot system technical scheme, two covers or the stator winding parameter more than two covers of synchronous generator are identical, and separate between each stator winding, nothing is electrically connected.
Further improvement as a kind of synchronous generator of the present invention and full power convertor pilot system technical scheme; Full power convertor comprises two sub-current transformers; Synchronous generator comprises two cover stator winding; One cover stator winding of a sub-current transformer control synchronous generator of full power convertor works in electric motor mode, keeps the rotating speed of synchronous generator, realizes the conversion of electric energy to mechanical energy; The another set of stator winding of another of full power convertor current transformer control synchronous generator works in generator mode, realizes the conversion of mechanical energy to electric energy.
Further improvement as a kind of synchronous generator of the present invention and full power convertor pilot system technical scheme; When the stator winding of synchronous generator is operated in electric motor mode; A wherein cover stator winding of said synchronous generator is under the action of a magnetic field of the drive current of coupled sub-current transformer input and synchronous generator rotor permanent magnet; Produce electromagnetic torque and drive the synchronous generator rotor rotation, realize the conversion of electric energy to mechanical energy; When the stator winding of synchronous generator is operated in generator mode; The rotor of synchronous generator is in rotation process; The rotor field is with rotor rotation; The another set of stator winding of magnetic force line cutting stator produces induced potential and electric current, and through coupled sub-current transformer, the mechanical energy of synchronous generator rotor is converted into electric energy again sends electrical network back to.
Further improvement as a kind of synchronous generator of the present invention and full power convertor pilot system technical scheme; A sub-current transformer control synchronous generator in the full power convertor makes the synchronous generator rotating speed be controlled to be set-point by permanent rotating speed control model operation; By permanent torque or the operation of permanent power control mode, the electric energy that synchronous generator is sent feeds back to electrical network in the full power convertor another sub-current transformer according to given instruction.
Further improvement as a kind of synchronous generator of the present invention and full power convertor pilot system technical scheme; The sub-current transformer output of each of full power convertor connects the same winding terminal of the Circuit Fault on Secondary Transformer that is incorporated into the power networks, and the secondary side of the transformer that is incorporated into the power networks is a winding; The transformer that is incorporated into the power networks also can adopt multiwinding transformer, and the sub-current transformer output of each of full power convertor connects a cover winding terminal of the Circuit Fault on Secondary Transformer that is incorporated into the power networks respectively.
Further improvement as a kind of synchronous generator of the present invention and full power convertor pilot system technical scheme; Synchronous generator and full power convertor pilot system also comprise drive motor; Drive motor links to each other with the axle of synchronous generator; Drive motor assists synchronous generator to start when synchronous generator starts, and breaks off with synchronous generator more afterwards being connected.
Through implementing a kind of synchronous generator of the invention described above and full power convertor pilot system, have following technique effect:
This system is to the technical characterstic of double winding (or many windings) synchronous generator; The pilot system scheme of a kind of full power convertor and supporting synchronous generator is proposed; This pilot system scheme is than existing other similar pilot system schemes, and simplified apparatus is formed greatly, and the occupation of land space is less relatively; The pilot system cost of investment is also lower, can reduce system energy consumption simultaneously and improve system's operational reliability.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the system architecture diagram that prior art drives stator double winding or many windings synchronous generator and full power convertor pilot system;
Fig. 2 is the system architecture diagram of synchronous generator of the present invention and a kind of embodiment of full power convertor pilot system;
Among the figure, 1-synchronous generator, 2-full power convertor, 3-current transformer one, 4-current transformer two, the 5-transformer that is incorporated into the power networks; Q1-unsteady flow module one, Q2-unsteady flow module two, Q3-unsteady flow module three, Q4-unsteady flow module four, L1-wave filter one, L2-wave filter two; L3-wave filter three, L4-wave filter four, T1-contactor one, T2-contactor two, K1-switch one; K2-switch two, R1-resistance one, R2-resistance two, C1-electric capacity one, C2-electric capacity two.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Shown in accompanying drawing 2, provided the specific embodiment of a kind of stator of the present invention many windings synchronous generator and full power convertor pilot system, below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
A kind of synchronous generator shown in accompanying drawing 2 and the embodiment of full power convertor pilot system; Comprise: synchronous generator 1, full power convertor 2 and the transformer 5 that is incorporated into the power networks; One end of full power convertor 2 links to each other with electrical network through the transformer 5 that is incorporated into the power networks; The other end of full power convertor 2 links to each other with synchronous generator 1; Full power convertor 2 comprises two or more sub-current transformers, and synchronous generator 1 comprises two covers or the above stator winding of two covers, and the one or more sub-current transformer of full power convertor 2 is controlled synchronous generator 1 a corresponding cover stator winding respectively and worked in electric motor mode; Keep the rotating speed of synchronous generator 1, realize the conversion of electric energy to mechanical energy; The sub-current transformer of other of full power convertor 2 is controlled synchronous generator 1 a corresponding cover stator winding respectively and is worked in generator mode, realizes the conversion of mechanical energy to electric energy.Synchronous generator 1 further is magneto alternator or electric excitation synchronous generator.Wherein, two covers or the stator winding parameter more than two covers of synchronous generator 1 are identical, and separate between each stator winding, nothing is electrically connected.
As a kind of typical embodiment; The full power convertor 2 that is complementary with stator double winding (or many windings) synchronous generator shown in accompanying drawing 2 is made up of two sub-current transformers; Be respectively sub-current transformer 1 and sub-current transformer 24, the total volume of each sub-current transformer mean allocation full power convertor 2.Sub-current transformer 1 is connected one of synchronous generator 1 respectively with sub-current transformer 24 and overlaps three-phase stator winding.If press the traditional experiment mode shown in the accompanying drawing 1; In the test; Every cover stator winding of synchronous generator all works in generator mode, exports energy through corresponding sub-current transformer to isolating the adapter transformer side respectively, and the rotating speed of generator must be driven by external prime mover and keep.
Full power convertor 2 is meant that the capacity of amount of capacity and synchronous generator 1 of current transformer is suitable.In wind-power electricity generation, adopt the wind-powered electricity generation unit of synchronous generator to require the generator electricity all to deliver to electrical network, so the current transformer here is full power convertor through current transformer.And the wind-powered electricity generation unit of employing double-fed asynchronous generator, the capacity of required current transformer only needs about 1/3 of generator capacity.The sub-current transformer 1 of full power convertor 2 further comprises wave filter one L1, wave filter two L2, unsteady flow module one Q1, unsteady flow module two Q2, switch one K1, electric capacity one C1 and resistance one R1; Sub-current transformer 24 further comprises wave filter three L3, wave filter four L4, unsteady flow module three Q3, unsteady flow module four Q4, switch two K2, electric capacity two C2 and resistance two R2.Wherein, unsteady flow module one Q1 and unsteady flow module three Q3 are the grid side current transformer, are connected with grid side, realize the function of power converter between interchange and direct current.Unsteady flow module two Q2 and unsteady flow module four Q4 are the motor side current transformer, are connected with the synchronous generator terminal, realize the function of direct current and alternating electromotive force conversion.
When the stator winding of synchronous generator 1 is operated in electric motor mode; A wherein cover stator winding of synchronous generator 1 is under the action of a magnetic field of the drive current of coupled sub-current transformer input and synchronous generator 1 rotor permanent magnet (or electric excitation); Produce electromagnetic torque and drive synchronous generator 1 rotor rotation, realize the conversion of electric energy to mechanical energy; When the stator winding of synchronous generator 1 is operated in generator mode; The rotor of synchronous generator 1 is in rotation process; The rotor field is with rotor rotation; The another set of stator winding of magnetic force line cutting stator produces induced potential and electric current, and through coupled sub-current transformer, the mechanical energy of synchronous generator 1 rotor is converted into electric energy again sends electrical network back to.One cover stator winding of a sub-current transformer control synchronous generator 1 of the full power convertor 2 that embodiment adopts works in electric motor mode; Keep the rotating speed of synchronous generator; Realize the conversion of electric energy to mechanical energy; The another set of stator winding of another sub-current transformer control synchronous generator 1 works in generator mode, realizes the conversion of mechanical energy to electric energy.As far as each sub-current transformer, can the full power operation.In service at synchronous generator; The partial stator winding works in the motor operational mode; Absorb the electric power that external power source (or current transformer) provides; Be translated into the mechanical kinetic energy of rotor, and other partial stator windings work in the generator operation pattern, the mechanical kinetic energy of rotor is converted into electric power exports to external power source or through current transformer.
A sub-current transformer control synchronous generator 1 in the full power convertor 2 makes synchronous generator 1 rotating speed be controlled to be set-point by permanent rotating speed control model operation; By permanent torque or the operation of permanent power control mode, the electric energy that synchronous generator 1 is sent feeds back to electrical network to the sub-current transformer of in the full power convertor 2 another according to given instruction.
When the sub-current transformer output of each of full power convertor 2 connects the same winding of transformer 5 secondary sides that are incorporated into the power networks, the capacity requirement of the transformer 5 that can reduce to be incorporated into the power networks; When being incorporated into the power networks the transformer adopting multiwinding transformer, the sub-current transformer output of each of full power convertor 2 connects a cover winding terminal of transformer 5 secondary sides that are incorporated into the power networks respectively, and this moment, the capacity requirement to the transformer 5 that is incorporated into the power networks strengthened.
The electrical network of transformer 5 of being incorporated into the power networks connects side and is called primary side, and current transformer connects side and is called secondary side, and primary side can be designed to high voltage variable low pressure according to actual needs to the change in voltage of secondary side, also but low pressure uprises pressure.
To the described technical scheme of embodiment; Adopt the situation of high capacity synchronous generator for synchronous generator 1, if, start synchronous generator than under the situation of difficult at the sub-current transformer 1 of full power convertor 2 and the control algolithm imperfection of sub-current transformer 24; Synchronous generator and full power convertor pilot system also further comprise drive motor; Drive motor links to each other with the axle of synchronous generator 1, when drive motor starts at synchronous generator 1, assists synchronous generator 1 to start; Break off with synchronous generator 1 more afterwards and being connected, let sub-current transformer 1 and the sub-current transformer 24 of full power convertor 2 control the rotating speed of synchronous generators 1 again.
The motor that whole many windings of stator synchronous generator and full power convertor pilot system are suitable for is mainly stator double winding (or many windings) synchronous generator (containing permanent magnetism or electric excitation synchronous generator), can save and be specifically designed to drawing generator to keep prime mover of rotating speed.The test that the technical scheme of pilot system is not only carried out to current transformer specially is (if generator is under the situation of matured product; Only current transformer is carried out each item function test or accomplishes the pilot production etc. of dispatching from the factory at full capacity); The test that also can carry out to generator specially (, need carry out functional test or accomplish the pilot production etc. of dispatching from the factory at full capacity) to generator if current transformer has been the mature and reliable product.Wherein, many windings of stator synchronous generator of indication in the embodiment, the notion of " the many windings of stator " comprises two windings or above all magneto alternators or the electric excitation synchronous generator of two windings.And each sub-current transformer of full power convertor 2 can be an electric cabinet separately.When full power convertor 2 includes only the electric cabinet of integral body, then be meant the inner independently converter cell of dividing by function, every unit connects the different windings of stator of synchronous generator.
The described stator of the specific embodiment of the invention many windings synchronous generator and full power convertor pilot system technical scheme; Because adopt energy feedback mode, simplified apparatus is formed greatly, does not need the driving current transformer of prime mover and prime mover; System loss is less; Also saved shaft coupling in addition, compared common experimental program, equipment investment only accounts for the half the of common scheme.Simultaneously, the occupation of land space of pilot system is less, and maintenance cost further reduces, because saved prime mover and driven current transformer, the system test operational reliability greatly improves, and system energy consumption then greatly reduces.Though pilot system described in the invention is primarily aimed at used current transformer of wind power generation field and synchronous generator, also be applicable to every other application that needs to adopt stator many windings synchronous generator and corresponding current transformer.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical scheme of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, be equal to replacement, equivalence changes and modify, all still belong in the scope that technical scheme of the present invention protects.
Claims (10)
1. synchronous generator and full power convertor pilot system; It is characterized in that; Comprise: synchronous generator (1), full power convertor (2) and the transformer that is incorporated into the power networks (5); One end of said full power convertor (2) links to each other with electrical network through the transformer that is incorporated into the power networks (5), and the other end of full power convertor (2) links to each other with synchronous generator (1), and described full power convertor (2) comprises two or more sub-current transformers; Described synchronous generator (1) comprises two covers or the above stator winding of two covers; The one or more sub-current transformer of said full power convertor (2) is controlled the corresponding cover stator winding of synchronous generator (1) respectively and is worked in electric motor mode, keeps the rotating speed of synchronous generator (1), realizes the conversion of electric energy to mechanical energy; Other sub-current transformers of full power convertor (2) are controlled the corresponding cover stator winding of synchronous generator (1) respectively and are worked in generator mode, realize the conversion of mechanical energy to electric energy.
2. a kind of synchronous generator according to claim 1 and full power convertor pilot system; It is characterized in that: two covers or the stator winding parameter more than two covers of said synchronous generator (1) are identical; Separate between each stator winding, nothing is electrically connected.
3. a kind of synchronous generator according to claim 1 and 2 and full power convertor pilot system; It is characterized in that: described full power convertor (2) comprises two sub-current transformers; Described synchronous generator (1) comprises two cover stator winding; One cover stator winding of a sub-current transformer control synchronous generator (1) of said full power convertor (2) works in electric motor mode, keeps the rotating speed of synchronous generator (1), realizes the conversion of electric energy to mechanical energy; The another set of stator winding of the sub-current transformer control synchronous generator of another of full power convertor (2) (1) works in generator mode, realizes the conversion of mechanical energy to electric energy.
4. a kind of synchronous generator according to claim 3 and full power convertor pilot system; It is characterized in that: when the stator winding of synchronous generator (1) is operated in electric motor mode; A wherein cover stator winding of said synchronous generator (1) is under the action of a magnetic field of the drive current of coupled sub-current transformer input and synchronous generator (1) rotor permanent magnet; Produce electromagnetic torque and drive synchronous generator (1) rotor rotation, realize the conversion of electric energy to mechanical energy; When the stator winding of synchronous generator (1) is operated in generator mode; The rotor of said synchronous generator (1) is in rotation process; The rotor field is with rotor rotation; The another set of stator winding of magnetic force line cutting stator produces induced potential and electric current, and through coupled sub-current transformer, the mechanical energy of synchronous generator (1) rotor is converted into electric energy again sends electrical network back to.
5. a kind of synchronous generator according to claim 3 and full power convertor pilot system; It is characterized in that: the sub-current transformer control synchronous generator (1) in the said full power convertor (2) makes synchronous generator (1) rotating speed be controlled to be set-point by permanent rotating speed control model operation; By permanent torque or the operation of permanent power control mode, the electric energy that synchronous generator (1) is sent feeds back to electrical network to another sub-current transformer in the said full power convertor (2) according to given instruction.
6. according to described a kind of synchronous generator of arbitrary claim in the claim 1,2,4,5 and full power convertor pilot system, it is characterized in that: described synchronous generator (1) is magneto alternator or electric excitation synchronous generator.
7. a kind of synchronous generator according to claim 6 and full power convertor pilot system; It is characterized in that: the said transformer that is incorporated into the power networks (5) is a primary side with the side that is connected of electrical network; With the side that is connected of full power convertor (2) is secondary side, and the change in voltage from the primary side to the secondary side is high voltage variable low pressure or uprises pressure for low pressure.
8. a kind of synchronous generator according to claim 7 and full power convertor pilot system; It is characterized in that: the sub-current transformer output of each of said full power convertor (2) connects the same winding of transformer (5) secondary side that is incorporated into the power networks, and the secondary side of the said transformer that is incorporated into the power networks (5) is a winding.
9. a kind of synchronous generator according to claim 7 and full power convertor pilot system; It is characterized in that: the described transformer that is incorporated into the power networks (5) adopts multiwinding transformer, and the sub-current transformer output of each of said full power convertor (2) connects a cover winding terminal of transformer (5) secondary side that is incorporated into the power networks respectively.
10. a kind of synchronous generator according to claim 7 and full power convertor pilot system; It is characterized in that: said synchronous generator and full power convertor pilot system also comprise drive motor; Said drive motor links to each other with the axle of synchronous generator (1); Drive motor assists synchronous generator (1) to start when synchronous generator (1) starts, and breaks off with synchronous generator (1) more afterwards being connected.
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Application publication date: 20120620 |