CN110545026A - stator excitation flywheel pulse induction generator system - Google Patents
stator excitation flywheel pulse induction generator system Download PDFInfo
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- CN110545026A CN110545026A CN201910893342.3A CN201910893342A CN110545026A CN 110545026 A CN110545026 A CN 110545026A CN 201910893342 A CN201910893342 A CN 201910893342A CN 110545026 A CN110545026 A CN 110545026A
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- generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K47/00—Dynamo-electric converters
- H02K47/12—DC/DC converters
- H02K47/14—Motor/generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
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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
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
a stator excitation flywheel pulse induction generator system belongs to the technical field of motors and power electronics. The invention aims at the problem of low system reliability caused by the fact that a pulse generator in the existing pulse generator set adopts a mode that an excitation winding is arranged on a rotor and a corresponding excitation assembly is configured. The output end of an input inverter of the induction generator is connected with a stator winding outgoing line of an input electric/exciter, a rotor winding outgoing line of the input electric/exciter is connected with a rotor winding outgoing line of the induction generator, a stator winding outgoing line of the induction generator is connected with an alternating current input end of an output rectifier, and the stator winding output end of the induction generator is connected with an exciting current adjusting unit; the rotor of the input motor/exciter is coaxially connected with the rotor of the induction generator; the rotor windings of the input motor/exciter and the rotor windings of the induction generator are both multi-phase windings and have the same number of phases. The invention can be used as a large-capacity pulse power supply.
Description
Technical Field
The invention relates to a stator excitation flywheel pulse induction generator system, and belongs to the technical field of motors and power electronics.
Background
The flywheel pulse generator is a flywheel energy storage device which utilizes the large inertia storage energy of a shafting and realizes electromechanical energy conversion by a coaxial motor/generator. Flywheel energy storage devices currently in use or under development are of two types: the first is that the power grades of energy storage and energy release are equivalent, the motor and the power generation function can be alternately realized by one motor, and the magnetic suspension flywheel energy storage system with medium and small capacity is of the type, has the characteristics of compact structure, high efficiency and the like, and is generally used as a flywheel battery; the second is that the energy storage power is smaller than the energy release power by more than one order of magnitude, two motors respectively realize the functions of electric drive and power generation, and a large-capacity alternating current pulse generator set is of the type, stores energy for a long time with small power, releases energy for a short time with large power, is generally used as a large-capacity pulse power supply, and can be applied to the fields of controlled nuclear fusion tests, nuclear explosion simulation, high-current particle beam accelerators, high-power pulse lasers, high-power microwaves, plasmas, electromagnetic emission technologies and the like.
the structure of a typical flywheel pulse generator system is shown in fig. 15. The basic working principle of the system is as follows: when the system is charged, an external power grid supplies energy to the system, a power converter formed by power electronic devices controls and drives a motor to drive a flywheel to rotate at a high speed, the flywheel can run at a constant high speed, the required energy is stored in a kinetic energy mode, and conversion from electric energy to mechanical energy and energy storage are completed. When the pulse load needs to supply power, the flywheel rotating at a high speed is used as a prime mover to drive the motor to generate power and operate, and the voltage and the current suitable for the pulse load are output through the power electronic converter to finish the energy conversion process.
the traditional pulse generator set usually adopts a structural form of 'motor-flywheel-generator'. The driving motor usually adopts a three-phase induction motor, while the pulse generator usually adopts a multiphase non-salient pole synchronous generator, the motor and the generator rotate coaxially, and an inertia flywheel is arranged on a rotating shaft of the generator. The flywheel and the generator are connected by a rigid coupling, the motor and the flywheel are connected flexibly, and the unit is provided with a plurality of bearings for supporting the rotor. The flywheel pulse generator set has the following disadvantages: the whole unit has long shafting, low rotating speed, low power density, low energy density and large volume weight; the rotor of the pulse generator is provided with an excitation winding, and a multi-stage rotating rectifier is adopted for excitation, so that the system is low in reliability and high in cost, and is not suitable for being used in a mobile platform.
Therefore, in view of the above disadvantages, it is desirable to provide a new flywheel pulse engine system, which is suitable for high-speed operation, and has a simplified rotor structure and improved system reliability.
Disclosure of Invention
The invention provides a stator excitation flywheel pulse induction generator system, aiming at the problem of low system reliability caused by the fact that a pulse generator in the existing pulse generator set adopts a mode that an excitation winding is arranged on a rotor and a corresponding excitation assembly is configured.
the invention relates to a stator excitation flywheel pulse induction generator system, which comprises an input inverter, an input electric/exciter, an induction generator, an output rectifier and an excitation current adjusting unit,
The output end of the input inverter is connected with a stator winding outgoing line of the input electric/exciter, a rotor winding outgoing line of the input electric/exciter is connected with a rotor winding outgoing line of the induction generator, a stator winding outgoing line of the induction generator is connected with an alternating current input end of the output rectifier, and the stator winding output end of the induction generator is connected with an exciting current adjusting unit;
the rotor of the input motor/exciter is coaxially connected with the rotor of the induction generator; the rotor windings of the input motor/exciter and the rotor windings of the induction generator are both multi-phase windings and have the same number of phases.
The invention also provides a stator excitation flywheel pulse induction generator system, which comprises an input inverter, an input motor, an excitation inverter, an exciter, an induction generator, an output rectifier and an excitation current regulating unit,
the output end of the input inverter is connected with a stator winding outgoing line of the input motor; the output end of the excitation inverter is connected with a stator winding outgoing line of an exciter, a rotor winding outgoing line of the exciter is connected with a rotor winding outgoing line of an induction generator, the stator winding outgoing line of the induction generator is connected with an alternating current input end of an output rectifier, and the stator winding output end of the induction generator is connected with an excitation current regulating unit;
The rotor of the input motor, the rotor of the exciter and the rotor of the induction generator are coaxially connected; the rotor winding of the exciter and the rotor winding of the induction generator are both multi-phase windings, and the number of phases is the same.
The invention provides a third stator excitation flywheel pulse induction generator system, which comprises an input inverter, an input motor, an excitation inverter, an induction generator, an output rectifier and an excitation current regulating unit,
a plurality of sets of windings are configured on a stator of the induction generator, wherein one set of windings is a stator excitation winding, and the other sets of windings are stator power windings;
the output end of the input inverter is connected with a stator winding outgoing line of the input motor; the output end of the excitation inverter is connected with a stator excitation winding outgoing line of the induction generator, and a stator power winding outgoing line of the induction generator is connected with an alternating current input end of the output rectifier; the output end of a stator power winding of the induction generator is connected with an exciting current adjusting unit;
The rotor of the input motor is coaxially connected with the rotor of the induction generator; the rotor winding of the induction generator is a cage winding, or the rotor of the induction generator is a solid rotor.
The invention provides a fourth stator excitation flywheel pulse induction generator system, which comprises an input inverter, an induction motor/generator, an output rectifier and an excitation current regulating unit,
The stator of the induction motor/generator is provided with a plurality of sets of windings, wherein one set of windings is a stator excitation winding, and the other sets of windings are stator power windings;
the output end of the input inverter is connected with a stator exciting winding outgoing line of the induction motor/generator, and a stator power winding outgoing line of the induction motor/generator is connected with an alternating current input end of the output rectifier; the output end of the stator power winding of the induction motor/generator is connected with an exciting current adjusting unit;
The rotor winding of the induction motor/generator is a cage winding or the rotor of the induction motor/generator is a solid rotor.
the stator excited flywheel pulse induction generator system of any preceding claim further comprising an inertial flywheel connected coaxially with the rotor of a corresponding induction generator or with the rotor of an induction motor/generator.
According to a first stator excited flywheel pulse induction generator system of the present invention,
the input electric/exciter and the induction generator share one cage-shaped rotor, and the stator of the input electric/exciter and the stator of the induction generator are sequentially and coaxially arranged on the periphery of the cage-shaped rotor along the axial direction; an air gap is formed between the stator and the cage type rotor; a first cage winding is arranged on a section of the cage rotor corresponding to the input electric/exciter stator, and a second cage winding is arranged on a section of the cage rotor corresponding to the induction generator stator.
according to a second stator excited flywheel pulse induction generator system of the present invention,
The exciter and the induction generator share one cage-shaped rotor, and the exciter stator and the induction generator stator are sequentially and coaxially mounted and fixed on the periphery of the cage-shaped rotor along the axial direction; an air gap is formed between the stator and the cage type rotor; a first cage winding is arranged on a section of the cage rotor corresponding to the exciter stator, and a second cage winding is arranged on a section of the cage rotor corresponding to the induction generator stator.
According to the third or fourth stator excitation flywheel pulse induction generator system, the rotor of the induction generator or the induction motor/generator is a solid rotor, the outer surface of the solid rotor is provided with narrow grooves along the axial direction, and the two axial ends of the solid rotor are provided with short-circuit copper end rings.
According to the stator excitation flywheel pulse induction generator system, the generator system adopts the following structure in a suitable alternative mode:
One) the input electric/exciter and the induction generator share one cylindrical solid iron core rotor, the input electric/exciter stator and the induction generator stator are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor;
secondly), the input motor, the exciter and the induction generator share one cylindrical solid iron core rotor, the input motor stator, the exciter stator and the induction generator stator are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor;
thirdly), the input motor and the induction generator share one cylindrical solid iron core rotor, a stator of the input motor and a stator of the induction generator are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor;
Four) the induction motor/generator employs a cylindrical solid core rotor with a stator at the periphery of the cylindrical solid core rotor and an air gap between the stator and the solid core rotor.
According to the stator excitation flywheel pulse induction generator system, the excitation current adjusting unit is realized by adopting one of the following modes:
The excitation current adjusting unit comprises a controller, a multiphase capacitor bank and a multiphase controllable saturated reactor bank, one end of each phase of capacitor in the multiphase capacitor bank is connected together, the other end of each phase of capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator, the multiphase capacitor bank is connected with the multiphase controllable saturated reactor bank in parallel, the direct current winding of the multiphase controllable saturated reactor bank is connected with the controller, and the alternating current winding of the multiphase controllable saturated reactor bank is connected in a star shape;
Secondly), the excitation current regulating unit comprises a multiphase capacitor bank and a multiphase switch reactor bank; one end of each phase capacitor in the multi-phase capacitor bank is connected together, and the other end of each phase capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator; the multiphase switch reactor group comprises a multiphase reactor group and a multiphase alternating current short-circuit switch, the multiphase reactor group is connected with the multiphase capacitor group in parallel, one end of each phase of reactor in the multiphase reactor group is connected together and is formed by connecting two reactors in series, one end of each phase of the multiphase alternating current short-circuit switch is connected together, and the other alternating current end of each phase of reactor is correspondingly connected between the two reactors of each phase of reactor;
Thirdly), the excitation current regulating unit comprises a multi-phase main capacitor bank, a multi-phase switch capacitor bank and a multi-phase switch reactor bank, wherein one end of each phase capacitor in the multi-phase main capacitor bank is connected together, and the other end of each phase capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator; the multi-phase switch capacitor bank is connected with the multi-phase capacitor bank in parallel, each phase of the multi-phase switch capacitor bank consists of a capacitor and an alternating current short-circuit switch, and one ends of all the alternating current short-circuit switches are connected together; the multiphase switch reactor group comprises a multiphase reactor group and a multiphase alternating current short-circuit switch group, the multiphase reactor group is connected with the multiphase switch capacitor group in parallel, one end of each phase of reactor in the multiphase reactor group is connected together and is formed by connecting two reactors in series, one end of each phase of alternating current short-circuit switch in the multiphase alternating current short-circuit switch group is connected together, and the other alternating current end is correspondingly connected between the two reactors of each phase of reactor respectively.
the invention has the beneficial effects that: the invention can combine the flywheel and the rotor into a whole, thereby ensuring that the shafting of the system unit is short, and the power density and the energy density are high; meanwhile, the excitation winding and the armature winding are both arranged on the stator, and the rotor is not provided with an electric brush and a slip ring, so that the system has the advantages of simple structure, high reliability, low cost and convenient maintenance; the motor has high strength, small volume and light weight, and is suitable for high-speed operation; the invention can realize the output voltage regulation of the system by controlling the magnitude of the reactive current output by the exciting inverter and the exciting current regulating unit, has easy control, small exciting power and wider voltage regulation capability or wide-range variable-speed constant-voltage output capability.
The system has the advantages of simple structure, low cost, high reliability and adjustable output voltage and frequency, can be used as a large-capacity pulse power supply, and has good application prospect in the fields of nuclear fusion test technology, plasma, electromagnetic emission technology and the like.
drawings
FIG. 1 is a block diagram of a stator excited flywheel pulse induction generator system according to an embodiment of the present invention;
FIG. 2 is a schematic view of a mechanical connection of the electrical machine corresponding to FIG. 1;
FIG. 3 is a block diagram of a stator-excited flywheel pulse induction generator system according to a second embodiment of the present invention;
FIG. 4 is a schematic view of the mechanical connection of the motor corresponding to FIG. 3;
FIG. 5 is a block diagram of a stator-excited flywheel pulse induction generator system according to a third embodiment of the present invention;
FIG. 6 is a schematic view of a mechanical connection of the motor corresponding to FIG. 5;
FIG. 7 is a block diagram of a stator excited flywheel pulse induction generator system according to an embodiment of the present invention;
FIG. 8 is a schematic view of the mechanical connection of the motor corresponding to FIG. 7;
FIG. 9 is a first embodiment of a first motor system according to a first configuration of the present invention;
FIG. 10 is a second embodiment of the motor system of the first construction of the present invention;
FIG. 11 is a particular embodiment of a third or fourth configuration of the motor system of the present invention;
FIG. 12 shows a first embodiment of an excitation current adjustment unit;
fig. 13 is a second embodiment of the excitation current adjusting unit;
Fig. 14 is a third embodiment of the excitation current adjustment unit;
Fig. 15 is a schematic structural diagram of a conventional flywheel pulse generator system.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
First embodiment, as shown in fig. 1 and 2, a first aspect of the present invention provides a stator-excited flywheel pulse induction generator system, comprising an input inverter 10, an input motor/exciter 11, an induction generator 12, an output rectifier 13 and a field current adjusting unit 14,
the output end of the input inverter 10 is connected to the stator winding lead-out wire of the input motor/exciter 11, the rotor winding lead-out wire of the input motor/exciter 11 is connected to the rotor winding lead-out wire of the induction generator 12, the stator winding lead-out wire of the induction generator 12 is connected to the ac input end of the output rectifier 13, and the stator winding output end of the induction generator 12 is connected to the exciting current adjusting unit 14;
The rotor of the input motor/exciter 11 is coaxially connected with the rotor of the induction generator 12; the rotor windings of the input motor/exciter 11 and the rotor windings of the induction generator 12 are each multi-phase windings and the number of phases is the same.
in the present embodiment, the system excitation reactive power can be controlled by the stator excitation winding of the induction generator 12.
The induction generator system according to the present embodiment is a flywheel energy storage system, wherein the induction generator 12 requires a certain excitation reactive power when operating. During the power generation process, as no prime mover is input, the rotating speed of the induction generator 12 is in a continuously reduced state; to maintain the voltage at the output of the power winding of the induction generator 12 stable, the reactive power of the excitation must be increased when the rotation speed of the generator is reduced. The system provides exciting reactive power by combining two exciting methods, wherein one part is provided by a stator exciting winding of the induction generator 12, and the other part is provided by an exciting current regulating unit 14.
the operating principle of the field current adjusting unit 14 is as follows: the exciting current regulating unit 14 may use an exciting capacitor to provide a certain exciting reactive power for the system. When the rotation speed of the induction generator 12 changes, the size of the excitation capacitor needs to be changed correspondingly, so as to achieve the purpose of maintaining the voltage at the output end to be stable. Therefore, the change of the excitation capacitance value during the change of the rotating speed can be realized by adopting various methods, including changing the value of the excitation capacitance by adopting a plurality of groups of capacitors, power electronic switching devices, inductors, controllable saturable reactors and the like. When the rotating speed changes, the equivalent capacitance value can be changed by controlling the on-off, the conduction duty ratio and the like of the switching element.
Further, the stator excitation flywheel pulse induction generator system further comprises an inertia flywheel, and the inertia flywheel is coaxially connected with the rotor of the induction generator 12.
Still further, the input electric/excitation machine 11 and the induction generator 12 share one cage-shaped rotor, and the stator of the input electric/excitation machine 11 and the stator of the induction generator 12 are coaxially mounted on the outer periphery of the cage-shaped rotor in the axial direction in sequence; an air gap is formed between the stator and the cage type rotor; a first cage winding is arranged on a section of the cage rotor corresponding to the input electric/exciter 11 stator, and a second cage winding is arranged on a section of the cage rotor corresponding to the induction generator 12 stator.
Still further, the generator system further comprises the following structure:
the input electric/exciter 11 and the induction generator 12 share a cylindrical solid core rotor, the stator of the input electric/exciter 11 and the stator of the induction generator 12 are coaxially arranged on the periphery of the solid core rotor in sequence along the axial direction, and an air gap is formed between the stator and the solid core rotor.
fig. 9 is a concrete example of the present embodiment, in which the inverter corresponds to the input inverter 10, the rectifier corresponds to the output rectifier 13, the structure on the left side of the dotted line shows the stator field winding and the corresponding rotor winding of the input electric/exciter 11, and the structure on the right side of the dotted line shows the stator output winding and the corresponding rotor winding of the induction generator 12; wherein the output terminal of the inverter is connected to the outgoing line of the stator winding of the input electric/exciter 11; the outgoing line of the rotor winding of the input electric/exciter 11 is connected with the outgoing line of the rotor winding of the induction generator 12 in a positive sequence; the rotor windings of the input motor/exciter 11 and the rotor windings of the induction generator 12 are three-phase windings.
In the present embodiment, the system operation is divided into two phases, an electric phase and a power generation phase. In fig. 9, A, B, C denotes the input electric/exciter 11 stator winding, a, B, C the input electric/exciter 11 rotor winding, a ', B', C 'the induction generator 12 stator winding, and a', B ', C' the induction generator 12 rotor winding.
in the motoring phase, the input motor/exciter 11 operates as a motor, accelerating the coaxially connected input motor/exciter 11 with the induction generator 12 and the flywheel. When the system speed reaches the rated speed, the system enters the power generation stage, at this time, the input electric/exciter 11 works as an exciter, three-phase current is introduced into an exciter stator winding A, B, C, an exciter rotor rotating at high speed cuts an air gap magnetic field, induced electromotive force is generated in exciter rotor windings a, B and C, and induced current is further generated.
Fig. 10 shows another embodiment of the present embodiment, which is different from fig. 9 in that the lead-out wires of the rotor winding of the input motor/exciter 11 are connected in reverse order to the lead-out wires of the rotor winding of the induction generator 12.
second embodiment, as shown in fig. 3 and 4, a second aspect of the present invention further provides a stator-excited flywheel pulse induction generator system, which includes an input inverter 20, an input motor 21, an excitation inverter 22, an exciter 23, an induction generator 24, an output rectifier 25, and an excitation current adjusting unit 26,
the output end of the input inverter 20 is connected to a stator winding lead wire of the input motor 21; the output end of the excitation inverter 22 is connected to the stator winding lead-out wire of the exciter 23, the rotor winding lead-out wire of the exciter 23 is connected to the rotor winding lead-out wire of the induction generator 24, the stator winding lead-out wire of the induction generator 24 is connected to the ac input end of the output rectifier 25, and the stator winding output end of the induction generator 24 is connected to the excitation current adjusting unit 26;
the rotor of the input motor 21, the rotor of the exciter 23, and the rotor of the induction generator 24 are coaxially connected; the rotor windings of the exciter 23 and the rotor windings of the induction generator 24 are both multi-phase windings and have the same number of phases.
The present embodiment differs from the first embodiment in that: the input electric/exciter 11 is separated and the corresponding functions are realized by the input electric motor 21 and the exciter 23, respectively.
Further, the stator excitation flywheel pulse induction generator system further comprises an inertia flywheel, and the inertia flywheel is coaxially connected with the rotor of the induction generator 24.
Still further, the exciter 23 and the induction generator 24 share one cage-shaped rotor, and the stator of the exciter 23 and the stator of the induction generator 24 are sequentially and coaxially mounted and fixed on the periphery of the cage-shaped rotor along the axial direction; an air gap is formed between the stator and the cage type rotor; a first cage winding is arranged on a section of the cage rotor corresponding to the stator of the exciter 23, and a second cage winding is arranged on a section of the cage rotor corresponding to the stator of the induction generator 24.
Still further, the generator system further comprises the following structure:
the input motor 21, the exciter 23 and the induction generator 24 share one cylindrical solid core rotor, the stator of the input motor 21, the stator of the exciter 23 and the stator of the induction generator 24 are sequentially and coaxially arranged on the periphery of the solid core rotor along the axial direction, and an air gap is formed between the stator and the solid core rotor.
Third embodiment, as shown in fig. 5 and 6, the third aspect of the present invention further provides a stator-excited flywheel pulse induction generator system, which comprises an input inverter 30, an input motor 31, an excitation inverter 32, an induction generator 33, an output rectifier 34 and an excitation current regulating unit 35,
a plurality of sets of windings are configured on the stator of the induction generator 33, wherein one set of windings is a stator excitation winding, and the other sets of windings are stator power windings;
The output end of the input inverter 30 is connected to a stator winding lead wire of the input motor 31; the output end of the excitation inverter 32 is connected with the stator excitation winding lead-out wire of the induction generator 33, and the stator power winding lead-out wire of the induction generator 33 is connected with the alternating current input end of the output rectifier 34; the output end of the stator power winding of the induction generator 33 is connected with an exciting current adjusting unit 35;
The rotor of the input motor 31 is coaxially connected with the rotor of the induction generator 33; the rotor winding of the induction generator 33 is a cage winding, or the rotor of the induction generator 33 is a solid rotor.
Further, the stator excitation flywheel pulse induction generator system further comprises an inertia flywheel, and the inertia flywheel is coaxially connected with the rotor of the induction generator 33.
still further, the rotor of the induction generator 33 is a solid rotor, the outer surface of the solid rotor is provided with a narrow groove along the axial direction, and both ends of the solid rotor in the axial direction are provided with short-circuit copper end rings.
still further, the generator system further comprises the following structure:
the input motor 31 and the induction generator 33 share one cylindrical solid iron core rotor, the stator of the input motor 31 and the stator of the induction generator 33 are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor.
in a fourth embodiment, as shown in fig. 7 and 8, a fourth aspect of the present invention further provides a stator excitation flywheel pulse induction generator system, which includes an input inverter 40, an induction motor/generator 41, an output rectifier 42 and an excitation current adjusting unit 43, wherein a plurality of sets of windings are configured on a stator of the induction motor/generator 41, one set of windings is a stator excitation winding, and the other sets are stator power windings;
the output terminal of the input inverter 40 is connected to the stator field winding lead of the induction motor/generator 41, and the stator power winding lead of the induction motor/generator 41 is connected to the ac input terminal of the output rectifier 42; the stator power winding output of the induction motor/generator 41 is connected to the exciting current adjusting unit 43;
The rotor windings of the induction motor/generator 41 are cage windings or the rotor of the induction motor/generator 41 is a solid rotor.
further, the stator excitation flywheel pulse induction generator system further comprises an inertia flywheel, and the inertia flywheel is coaxially connected with the rotor of the induction motor/generator 41.
Still further, the rotor of the induction motor/generator 41 is a solid rotor, the outer surface of which is axially slotted with narrow slots, and the axial ends of which are provided with short-circuit copper end rings.
still further, the induction motor/generator 41 may also be a cylindrical solid core rotor with the stator at the periphery of the cylindrical solid core rotor and an air gap between the stator and the solid core rotor.
As a specific example of the third or fourth embodiment, as shown in fig. 11, the stator of the induction generator 33 or the induction motor/generator 41 has two sets of power windings, and the two sets of windings are 30 degrees out of phase; the output end of each set of power winding of the induction generator 33 or the induction motor/generator 41 is connected with an excitation current regulating unit in parallel, and the outgoing line of each set of power winding of the induction generator 33 or the induction motor/generator 41 is connected with the alternating current input end of the output rectifier. The direct current output ends of the two output rectifiers are connected in parallel. At the moment, the generator rotor adopts a squirrel-cage rotor.
The excitation current adjusting unit in any embodiment of the present invention may be implemented in one of the following ways:
The excitation current adjusting unit comprises a controller, a multiphase capacitor bank and a multiphase controllable saturated reactor bank, one end of each phase of capacitor in the multiphase capacitor bank is connected together, the other end of each phase of capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator, the multiphase capacitor bank is connected with the multiphase controllable saturated reactor bank in parallel, the direct current winding of the multiphase controllable saturated reactor bank is connected with the controller, and the alternating current winding of the multiphase controllable saturated reactor bank is connected in a star shape;
secondly), the excitation current regulating unit comprises a multiphase capacitor bank and a multiphase switch reactor bank; one end of each phase capacitor in the multi-phase capacitor bank is connected together, and the other end of each phase capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator; the multiphase switch reactor group comprises a multiphase reactor group and a multiphase alternating current short-circuit switch, the multiphase reactor group is connected with the multiphase capacitor group in parallel, one end of each phase of reactor in the multiphase reactor group is connected together and is formed by connecting two reactors in series, one end of each phase of the multiphase alternating current short-circuit switch is connected together, and the other alternating current end of each phase of reactor is correspondingly connected between the two reactors of each phase of reactor;
thirdly), the excitation current regulating unit comprises a multi-phase main capacitor bank, a multi-phase switch capacitor bank and a multi-phase switch reactor bank, wherein one end of each phase capacitor in the multi-phase main capacitor bank is connected together, and the other end of each phase capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator; the multi-phase switch capacitor bank is connected with the multi-phase capacitor bank in parallel, each phase of the multi-phase switch capacitor bank consists of a capacitor and an alternating current short-circuit switch, and one ends of all the alternating current short-circuit switches are connected together; the multiphase switch reactor group comprises a multiphase reactor group and a multiphase alternating current short-circuit switch group, the multiphase reactor group is connected with the multiphase switch capacitor group in parallel, one end of each phase of reactor in the multiphase reactor group is connected together and is formed by connecting two reactors in series, one end of each phase of alternating current short-circuit switch in the multiphase alternating current short-circuit switch group is connected together, and the other alternating current end is correspondingly connected between the two reactors of each phase of reactor respectively.
fig. 12 shows a specific circuit structure of the excitation current adjusting unit corresponding to the first one), where Qin is the input power of the excitation current adjusting unit, i.e. the output power of the power winding of the induction generator; QL is the output power of the exciting current regulating unit, i.e. the load power; QC is the reactive power provided by the capacitor, QSR is the controllable saturable reactor power, IK is the control current, and UK is the control voltage. The change in equivalent capacitance values is achieved by adjusting the variables in fig. 12.
fig. 13 shows a specific circuit configuration of the field current adjusting unit corresponding to the second), and is mainly different from the first) in that the field current adjusting unit is composed of a three-phase capacitor bank and a three-phase switched reactor bank.
Fig. 14 shows a specific circuit configuration of the field current adjusting unit corresponding to the third), and is mainly different from the first) in that the field current adjusting unit is composed of a three-phase capacitor bank, a three-phase switched capacitor bank, and a three-phase switched reactor bank.
in the stator excitation flywheel pulse induction generator system according to the four embodiments of the present invention, when the inertia of the input motor rotor, the exciter rotor, and the induction generator rotor is sufficiently large, the inertia flywheel may be omitted. Therefore, the flywheel and the rotor are combined into a whole, the shaft system of the unit is short, and the power density and the energy density are high.
the energy required by the system in the discharge stage is as follows:
W＝Pt，
wherein W1 is the energy required by the system power generation stage, P is the system discharge power, and t is the system power generation time.
the energy W2 released by the rotor in the system power generation stage is as follows:
j is the rotational inertia of the motor rotor, omega max is the corresponding angular speed at the maximum rotating speed in the power generation stage of the system, and omega min is the corresponding angular speed at the minimum rotating speed in the power generation stage of the system.
The system rotor moment of inertia Jr is:
where mr is the motor rotor mass and D2 is the rotor outer diameter.
the flywheel in the system is used for providing energy for the power generation stage of the system by utilizing the kinetic energy stored by the large-inertia rotating flywheel. Because the rotor has the rotational inertia, when W2> W1, the rotational inertia of the motor rotor in the system meets the requirement of the system in the power generation stage, the integrated design of the flywheel and the rotor can be realized, and in such a case, an additional flywheel does not need to be designed.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. A stator excitation flywheel pulse induction generator system is characterized by comprising an input inverter (10), an input electric/exciter (11), an induction generator (12), an output rectifier (13) and an excitation current adjusting unit (14),
The output end of the input inverter (10) is connected with a stator winding outgoing line of an input electric/exciter (11), a rotor winding outgoing line of the input electric/exciter (11) is connected with a rotor winding outgoing line of an induction generator (12), the stator winding outgoing line of the induction generator (12) is connected with an alternating current input end of an output rectifier (13), and the stator winding output end of the induction generator (12) is connected with an excitation current adjusting unit (14);
the rotor of the input electric/exciter (11) is coaxially connected with the rotor of the induction generator (12); the rotor winding of the input electric/exciter (11) and the rotor winding of the induction generator (12) are all multi-phase windings, and the number of phases is the same.
2. A stator excitation flywheel pulse induction generator system is characterized by comprising an input inverter (20), an input motor (21), an excitation inverter (22), an exciter (23), an induction generator (24), an output rectifier (25) and an excitation current adjusting unit (26),
The output end of the input inverter (20) is connected with a stator winding outgoing line of the input motor (21); the output end of the excitation inverter (22) is connected with the stator winding outgoing line of the exciter (23), the rotor winding outgoing line of the exciter (23) is connected with the rotor winding outgoing line of the induction generator (24), the stator winding outgoing line of the induction generator (24) is connected with the alternating current input end of the output rectifier (25), and the stator winding output end of the induction generator (24) is connected with the excitation current adjusting unit (26);
the rotor of the input motor (21), the rotor of the exciter (23) and the rotor of the induction generator (24) are coaxially connected; the rotor winding of the exciter (23) and the rotor winding of the induction generator (24) are both multi-phase windings, and the number of phases is the same.
3. a stator excitation flywheel pulse induction generator system is characterized by comprising an input inverter (30), an input motor (31), an excitation inverter (32), an induction generator (33), an output rectifier (34) and an excitation current regulating unit (35),
A plurality of sets of windings are configured on the stator of the induction generator (33), wherein one set of windings is a stator excitation winding, and the other sets of windings are stator power windings;
the output end of the input inverter (30) is connected with a stator winding outgoing line of the input motor (31); the output end of the excitation inverter (32) is connected with the stator excitation winding outgoing line of the induction generator (33), and the stator power winding outgoing line of the induction generator (33) is connected with the alternating current input end of the output rectifier (34); the output end of a stator power winding of the induction generator (33) is connected with an exciting current adjusting unit (35);
The rotor of the input motor (31) is coaxially connected with the rotor of the induction generator (33); the rotor winding of the induction generator (33) is a cage winding, or the rotor of the induction generator (33) is a solid rotor.
4. a stator excitation flywheel pulse induction generator system is characterized by comprising an input inverter (40), an induction motor/generator (41), an output rectifier (42) and an excitation current regulating unit (43),
the stator of the induction motor/generator (41) is provided with a plurality of sets of windings, wherein one set of windings is a stator excitation winding, and the other sets of windings are stator power windings;
The output end of the input inverter (40) is connected with the stator exciting winding lead wire of the induction motor/generator (41), and the stator power winding lead wire of the induction motor/generator (41) is connected with the alternating current input end of the output rectifier (42); the output end of the stator power winding of the induction motor/generator (41) is connected with an exciting current adjusting unit (43);
the rotor winding of the induction motor/generator (41) is a cage winding or the rotor of the induction motor/generator (41) is a solid rotor.
5. a stator excited flywheel pulse induction generator system as claimed in any one of claims 1 to 4, further comprising an inertial flywheel connected coaxially with the rotor of the respective induction generator or with the rotor of the induction motor/generator (41).
6. The stator excited flywheel pulse induction generator system of claim 1,
the input electric/exciter (11) and the induction generator (12) share one cage-shaped rotor, and the stator of the input electric/exciter (11) and the stator of the induction generator (12) are sequentially and coaxially arranged on the periphery of the cage-shaped rotor along the axial direction; an air gap is formed between the stator and the cage type rotor; a first cage winding is arranged on a section of the cage rotor corresponding to the input electric/exciter (11) stator, and a second cage winding is arranged on a section of the cage rotor corresponding to the induction generator (12) stator.
7. the stator excited flywheel pulse induction generator system of claim 2,
the exciter (23) and the induction generator (24) share one cage-shaped rotor, and the stator of the exciter (23) and the stator of the induction generator (24) are sequentially and coaxially mounted and fixed on the periphery of the cage-shaped rotor along the axial direction; an air gap is formed between the stator and the cage type rotor; a first cage winding is arranged on a section of the cage rotor corresponding to the stator of the exciter (23), and a second cage winding is arranged on a section of the cage rotor corresponding to the stator of the induction generator (24).
8. The stator excited flywheel pulse induction generator system of claim 3 or 4,
The rotor of the induction generator (33) or the induction motor/generator (41) is a solid rotor, the outer surface of the solid rotor is provided with narrow grooves along the axial direction, and two axial ends of the solid rotor are provided with short-circuit copper end rings.
9. a stator excited flywheel pulse induction generator system as claimed in any one of claims 1 to 4, wherein the generator system is further adapted to alternatively adopt the following configuration:
One) the input electric/exciter (11) and the induction generator (12) share one cylindrical solid iron core rotor, the stator of the input electric/exciter (11) and the stator of the induction generator (12) are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor;
Secondly), the input motor (21), the exciter (23) and the induction generator (24) share one cylindrical solid iron core rotor, the stator of the input motor (21), the stator of the exciter (23) and the stator of the induction generator (24) are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor;
Thirdly), the input motor (31) and the induction generator (33) share one cylindrical solid iron core rotor, the stator of the input motor (31) and the stator of the induction generator (33) are sequentially and coaxially arranged on the periphery of the solid iron core rotor along the axial direction, and an air gap is formed between the stator and the solid iron core rotor;
and IV) the induction motor/generator (41) adopts a cylindrical solid iron core rotor, the stator is arranged on the periphery of the cylindrical solid iron core rotor, and an air gap is formed between the stator and the solid iron core rotor.
10. A stator excited flywheel pulse induction generator system as claimed in any one of claims 1 to 4, wherein the field current regulation unit is implemented in one of the following ways:
the excitation current adjusting unit comprises a controller, a multiphase capacitor bank and a multiphase controllable saturated reactor bank, one end of each phase of capacitor in the multiphase capacitor bank is connected together, the other end of each phase of capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator, the multiphase capacitor bank is connected with the multiphase controllable saturated reactor bank in parallel, the direct current winding of the multiphase controllable saturated reactor bank is connected with the controller, and the alternating current winding of the multiphase controllable saturated reactor bank is connected in a star shape;
secondly), the excitation current regulating unit comprises a multiphase capacitor bank and a multiphase switch reactor bank; one end of each phase capacitor in the multi-phase capacitor bank is connected together, and the other end of each phase capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator; the multiphase switch reactor group comprises a multiphase reactor group and a multiphase alternating current short-circuit switch, the multiphase reactor group is connected with the multiphase capacitor group in parallel, one end of each phase of reactor in the multiphase reactor group is connected together and is formed by connecting two reactors in series, one end of each phase of the multiphase alternating current short-circuit switch is connected together, and the other alternating current end of each phase of reactor is correspondingly connected between the two reactors of each phase of reactor;
Thirdly), the excitation current regulating unit comprises a multi-phase main capacitor bank, a multi-phase switch capacitor bank and a multi-phase switch reactor bank, wherein one end of each phase capacitor in the multi-phase main capacitor bank is connected together, and the other end of each phase capacitor is correspondingly connected with the output end of the corresponding stator winding of the corresponding generator; the multi-phase switch capacitor bank is connected with the multi-phase capacitor bank in parallel, each phase of the multi-phase switch capacitor bank consists of a capacitor and an alternating current short-circuit switch, and one ends of all the alternating current short-circuit switches are connected together; the multiphase switch reactor group comprises a multiphase reactor group and a multiphase alternating current short-circuit switch group, the multiphase reactor group is connected with the multiphase switch capacitor group in parallel, one end of each phase of reactor in the multiphase reactor group is connected together and is formed by connecting two reactors in series, one end of each phase of alternating current short-circuit switch in the multiphase alternating current short-circuit switch group is connected together, and the other alternating current end is correspondingly connected between the two reactors of each phase of reactor respectively.
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| CN112968639A (en) * | 2021-02-02 | 2021-06-15 | 哈尔滨工业大学 | Pulse generator excitation system |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0122310A1 (en) * | 1983-04-15 | 1984-10-24 | Hokuetsu Industries Co., Ltd. | Control system for a self-excited alternating current generator |
| CN2030775U (en) * | 1988-04-21 | 1989-01-11 | 山东平度县第一职业高级中学 | Automatic voltage-regulator for synchronous generator |
| CN2195157Y (en) * | 1994-06-02 | 1995-04-19 | 吴积善 | AC excitation synchronous generator |
| JPH07147737A (en) * | 1993-11-25 | 1995-06-06 | Nippondenso Co Ltd | Dynamo controller for vehicle |
| CN1185868A (en) * | 1995-03-31 | 1998-06-24 | 埃科艾尔公司 | Hybrid alternator having voltage regutator |
| CN1492565A (en) * | 2003-08-29 | 2004-04-28 | 泰豪科技股份有限公司 | Multiple machine integrated brushless motor variable frequency unit |
| CN201061153Y (en) * | 2007-02-07 | 2008-05-14 | 哈尔滨九洲电气股份有限公司 | Full power networking convertor for megawatt wind power generation |
| CN202737467U (en) * | 2012-07-27 | 2013-02-13 | 北京国能子金电气技术有限公司 | Rapid dynamic reactive power compensation device used for wind power plant |
| CN105634228A (en) * | 2016-01-21 | 2016-06-01 | 南京航空航天大学 | Five-phase stator dual-winding asynchronous generator and parameter optimization method therefor |
| CN206370743U (en) * | 2017-01-19 | 2017-08-01 | 天津华鑫兴业科技有限公司 | A kind of efficient brushless generator |
| CN107017747A (en) * | 2016-01-27 | 2017-08-04 | 张明江 | Integrated (generator) electronic device |
| CN107742964A (en) * | 2017-11-20 | 2018-02-27 | 黄舒淳 | A kind of electric variable frequency brushless synchronous generating group |
| CN207459902U (en) * | 2017-08-18 | 2018-06-05 | 斯托格尼耶恩科·瓦连京 | Energy-storage generating apparatus and electricity generation system |
| CN108448807A (en) * | 2018-03-21 | 2018-08-24 | 哈尔滨工业大学 | Flywheel energy storage system |
-
2019
- 2019-09-20 CN CN201910893342.3A patent/CN110545026A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0122310A1 (en) * | 1983-04-15 | 1984-10-24 | Hokuetsu Industries Co., Ltd. | Control system for a self-excited alternating current generator |
| CN2030775U (en) * | 1988-04-21 | 1989-01-11 | 山东平度县第一职业高级中学 | Automatic voltage-regulator for synchronous generator |
| JPH07147737A (en) * | 1993-11-25 | 1995-06-06 | Nippondenso Co Ltd | Dynamo controller for vehicle |
| CN2195157Y (en) * | 1994-06-02 | 1995-04-19 | 吴积善 | AC excitation synchronous generator |
| CN1185868A (en) * | 1995-03-31 | 1998-06-24 | 埃科艾尔公司 | Hybrid alternator having voltage regutator |
| CN1492565A (en) * | 2003-08-29 | 2004-04-28 | 泰豪科技股份有限公司 | Multiple machine integrated brushless motor variable frequency unit |
| CN201061153Y (en) * | 2007-02-07 | 2008-05-14 | 哈尔滨九洲电气股份有限公司 | Full power networking convertor for megawatt wind power generation |
| CN202737467U (en) * | 2012-07-27 | 2013-02-13 | 北京国能子金电气技术有限公司 | Rapid dynamic reactive power compensation device used for wind power plant |
| CN105634228A (en) * | 2016-01-21 | 2016-06-01 | 南京航空航天大学 | Five-phase stator dual-winding asynchronous generator and parameter optimization method therefor |
| CN107017747A (en) * | 2016-01-27 | 2017-08-04 | 张明江 | Integrated (generator) electronic device |
| CN206370743U (en) * | 2017-01-19 | 2017-08-01 | 天津华鑫兴业科技有限公司 | A kind of efficient brushless generator |
| CN207459902U (en) * | 2017-08-18 | 2018-06-05 | 斯托格尼耶恩科·瓦连京 | Energy-storage generating apparatus and electricity generation system |
| CN107742964A (en) * | 2017-11-20 | 2018-02-27 | 黄舒淳 | A kind of electric variable frequency brushless synchronous generating group |
| CN108448807A (en) * | 2018-03-21 | 2018-08-24 | 哈尔滨工业大学 | Flywheel energy storage system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968639A (en) * | 2021-02-02 | 2021-06-15 | 哈尔滨工业大学 | Pulse generator excitation system |
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