CN105024602B - A kind of asynchronous motor power generation system of stator duplex winding and control method - Google Patents
A kind of asynchronous motor power generation system of stator duplex winding and control method Download PDFInfo
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Abstract
The present invention discloses a kind of asynchronous motor power generation system of stator duplex winding and control method, belongs to the technical field of variable-frequency alternating current power generation system.The New Topological uses filter inductance, exciting capacity, and motor stator winding leakage inductance forms LCL type wave filter, reduces the volume weight of electricity generation system.The vector control method based on dynamic model is used in control, improves system dynamic and static state performance.The variable-frequency alternating current power generation system includes dual stator-winding induction generator, power inverter, LCL type wave filter, DC filter capacitor, storage battery, diode, direct current voltage sensor, AC voltage sensor, AC current sensor, controller, drive circuit；The system can be used for the independent current source application scenarios such as aircraft, naval vessel.
Description
Technical field
The present invention relates to a kind of stator double-winding asynchronous variable-frequency alternating current power generation system and control method, belongs to frequency conversion friendship
Flow the technical field of electricity generation system.
Background technology
Variable frequency AC power system is an important direction of electricity/electric aircraft power source development more.It is such as large-scale civilian
Passenger plane B787 and A380 use variable frequency AC power system.It is right with being continuously increased for airborne electrical equipment and precision instrument
The capacity and performance requirement of power-supply system are also higher and higher.
Stator double-winding asynchronous (DWIG) is a kind of new squirrel cage induction motor proposed the beginning of this century, it is inherited
Common cage type asynchronous machine is simple in structure, cost is low, high reliability.There is double winding on the stator of the generator, point
It is not control winding and power winding.Control winding is connected to power inverter and the magnetic field of motor and torque is adjusted, power
Winding is to load supplying.They are only by magnetic coupling, no electrical connection, operational excellence under speed change environment, and controller capacity
It is smaller, it is adapted to apply in high performance independent electric power supply.
The waveform quality of alternating current power-generating system is the important indicator for weighing its performance, and relevant criterion has all made this detailed
Regulation.In order to meet standard, in the prior art scheme, the control winding side base sheet of asynchronous motor power generation system of stator duplex winding
It is filtered by single inductance (single L), system generally requires larger filter inductance at this time, this undoubtedly adds the volume of system
Weight.Control winding side increase exciting capacity in existing design scheme, forms the LCL type with more preferable filtering characteristic and filters
Device, can effectively filter out higher hamonic wave, reduce loss, reduce system bulk weight.
The runnability of asynchronous motor power generation system of stator duplex winding also depends on used control strategy at the same time.Well
Control strategy can not only eliminate systematic steady state error, improve system dynamic responding speed, waveform quality can also be improved simultaneously
Reduce system loss.From the point of view of existing data, the voltage adjusting method of asynchronous motor power generation system of stator duplex winding is mainly
Scalar control based on steady-state model, and be not based on system dynamic model and be controlled device design.The scalar control of asynchronous machine
Due to not accounting for the dynamic model of electricity generation system, so its dynamic and static state performance is undesirable, regulator parameter is chosen difficult.
The content of the invention
Goal of the invention：For the above-mentioned prior art, a kind of asynchronous motor power generation system of stator duplex winding and controlling party are proposed
Method, effectively filters out the higher hamonic wave of converter generation, reduces loss.
Technical solution：A kind of variable-frequency alternating current power generation system, including by dual stator-winding induction generator, power inverter,
The main power circuit that filter inductance, exciting capacity, DC filter capacitor are formed, the auxiliary electricity being made of storage battery and diode
Source, is made of direct current voltage sensor, AC voltage sensor, the first AC current sensor, the second AC current sensor
Detection circuit, the control circuit being made of controller and drive circuit；Wherein：
In the main power circuit, connecting stator double winding is different after the exchange side series filtering inductance of the power inverter
The control winding of generator is walked, the exciting capacity forms LCL type wave filter with filter inductance and motor stator winding leakage inductance；
The LCL type wave filter is used to provide idle encourage to dual stator-winding induction generator using exciting capacity while filtering
Magnetic；The low pressure small-power accessory power supply is used to provide initial excitation for motor；The detection circuit is used to detect the main work(
DC voltage, exchange side voltage, ac-side current in rate circuit, and the detected value that detection is obtained is transmitted to the control
Device；The controller is controlled using vector control strategy driving power converter.Used in control and be based on dynamic model
Vector control method, it is so easily designed and calculate adjuster and its parameter, and the design of the controller presses down from principle
Load and the interference of rotating speed have been made, therefore system can be made to possess excellent sound state property under different loads and speed conditions
Energy.
A kind of vector control method of variable-frequency alternating current power generation system, includes the following steps：
Step 1, the output of dual stator-winding induction generator power winding side is calculated to obtain according to AC voltage sensor measured value
Alternating voltage virtual value up, stator flux of motor set-point is calculated using formula (1)
Wherein：Represent the given virtual value of power winding output AC voltage, ψ0Expression system is in quiescent point
When stator flux of motor estimate；K1For the proportionality coefficient of proportional and integral controller, K2For integral coefficient；P is differential operator；
Step 2, it is fixed with the synchronous rotating frame of stator magnetic linkage vector oriented, observation to be established using stator flux observer
Sub- magnetic linkage amplitude ψδ, and closed loop feedback adjusting is carried out, obtain d shaft current set-point of the control winding under synchronous coordinate system
As shown in formula (2)：
Wherein：K3For the proportionality coefficient of stator magnetic linkage proportional and integral controller, K4For stator magnetic linkage proportional and integral controller
Integral coefficient；
Step 3, according to direct current voltage sensor measured value ucDCWith DC voltage set-pointClosed loop feedback adjusting is carried out,
Obtain q shaft current set-point of the control winding under synchronous coordinate systemAs shown in formula (3)：
（3）
Wherein：K5For the proportionality coefficient of direct-current voltage proportion integral controller, K6For direct-current voltage proportion integral controller
Integral coefficient；
Step 4, control winding current value is measured using the first AC current sensor, control winding is obtained after coordinate transform
D under synchronous coordinate system, q shaft current isdAnd isq, according to d of the control winding that step 2 and 3 obtain under synchronous coordinate system,
Q shaft current set-pointsWithTo control winding synchronous coordinate system d, q shaft currents carry out closed loop feedback adjusting, controlled
D of the winding processed under synchronous coordinate system, q shaft voltages giveAs shown in formula (4)：
Wherein：K7For the proportionality coefficient of current closed-loop proportional and integral controller, K8For current closed-loop proportional and integral controller
Integral coefficient, ipdThe power winding d shaft current values for measuring and being calculated for the second AC current sensor；
Step 5, the d according to the control winding that step 4 is obtained under synchronous coordinate system, q shaft voltage giveWith it is fixed
The magnetic linkage angle of sub- flux observer measurementUsing Sine Wave Pulse Width Modulation or space vector pulse width modulation, driving power becomes
The switching tube of parallel operation, controls the amplitude and rotating speed of stator double-winding asynchronous stator rotating excitation field, so that control system is normal
Steady operation.
Beneficial effect：Compared to traditional asynchronous motor power generation system of stator duplex winding, in topological structure of the invention,
LCL type filter construction is formd on main power circuit, the LCL type wave filter is by filter inductance, exciting capacity and stator double wrap
Control winding stator leakage inductance composition in group asynchronous machine, an inductance fewer than common LCL filter, and capacitance is except filtering
Effect is outer, also acts as the effect that excitation is carried out to double-winding AC-DC generator.LCL type wave filter is filtered compared to common single L
Device, due to the low-frequency filter characteristics with three ranks, thus for same harmonic standard and relatively low switching frequency, can use phase
Less filter inductance is designed, the volume weight of system is effectively reduced and reduces loss.
Brief description of the drawings
Fig. 1 is the schematic diagram of variable-frequency alternating current power generation system；
Fig. 2 is the main power schematic equivalent circuit of variable-frequency alternating current power generation system；
Fig. 3 is variable-frequency alternating current power generation system vector control method schematic diagram；
Figure label explanation：In Fig. 1,1, dual stator-winding induction generator；2nd, filter inductance；3rd, power inverter；4、
Exciting capacity；5th, storage battery；6th, diode；7th, filter capacitor；8th, direct current voltage sensor, 9, AC voltage sensor；10th,
One AC current sensor；11st, the second AC current sensor；12nd, controller；13rd, drive circuit；14th, load.In Fig. 2,
15th, power inverter equivalent voltage source；16th, LCL type wave filter, by filter inductance, exciting capacity, machine winding leakage inductance composition；
17th, stator double-winding motor stator power winding equivalent circuit；18th, the equivalent magnetizing inductance of stator double-winding motor；19th, stator
Double-winding motor rotor equivalent circuit；20th, stator double-winding motor stator control winding equivalent resistance.
Embodiment
Further explanation is done to the present invention below in conjunction with the accompanying drawings.
Variable-frequency alternating current power generation system as shown in Figure 1, including 1, three filter inductance 2 of dual stator-winding induction generator,
3, three exciting capacities 4 of power inverter, storage battery 5, diode 6, DC filter capacitor 7, direct current voltage sensor 8, exchange
Voltage sensor 9, the first AC current sensor 10, the second AC current sensor 11, controller 12, drive circuit 13.It is fixed
Sub- 1, three filter inductance 2 of double-winding AC-DC generator, power inverter 3, three exciting capacities 4, DC filter capacitors 7 form
Main power circuit.Storage battery 5 and diode 6 form low pressure small-power accessory power supply.Direct current voltage sensor 8, alternating voltage pass
Sensor 9, the first AC current sensor 10, the second AC current sensor 11 composition detection circuit.Controller 12 and driving electricity
13 composition control circuit of road.A set of stator winding that dual stator-winding induction generator 1 is connected to power inverter 3 is referred to as to control
Winding processed, dual stator-winding induction generator 1 directly connect loaded another set of stator winding and are referred to as power winding.
Wherein, the anode of diode 6 is connected with the cathode of storage battery 5, cathode and 3 direct current of power inverter of diode 6
The positive direct-current busbar connection of side, the anode of storage battery 5 are connected with negative dc bus.On power inverter dc bus
Low pressure small-power accessory power supply (24V or 48V) provides initial excitation reactive power for dual stator-winding induction generator, and it is fixed to ensure
Sub- double-winding AC-DC generator smoothly builds pressure, when the DC bus-bar voltage of power inverter 3 exceedes low pressure small-power accessory power supply
Voltage when, diode 6 reversely ends, and storage battery 5 and dc bus depart from naturally.
The both ends of low pressure small-power accessory power supply are connected with filter capacitor 7, and filter capacitor 7 is become by dc bus and power
The DC side connection of parallel operation 3.The exchange side of power inverter 3 is three-phase three-wire system, is connected to three filter inductances 2 successively, three
Exciting capacity 4, the control winding of dual stator-winding induction generator 1, such filter inductance 2, exciting capacity 4 and motor control
Wound stator leakage inductance forms LCL type wave filter.The three-phase four-wire system power winding of dual stator-winding induction generator 1 proposes load
For variable frequency alternating current power source.
Voltage and current sensor is Hall sensor, and direct current voltage sensor 8 and AC voltage sensor 9 are used respectively
To measure power inverter DC bus-bar voltage and power winding frequency-changing AC voltage, AC current sensor 10,11 is used for surveying
Measure winding current.System status signal on these voltage and current sensors collection main power circuit, uses for control circuit.
Power inverter 3 can use IGBT or intelligent power module (IPM) converter.Controller 12 is using digital signal processor come real
It is existing.The signal that controller 12 is gathered according to sensor, obtains the drive signal of power inverter 3 after data processing, then by driving
Dynamic circuit 13 controls the switching tube of power inverter.
Fig. 2 shows the one phase equivalent circuit model of main power circuit, describes LCL type in the variable-frequency alternating current power generation system
Filter Principle.LCL type wave filter 16, by the filter inductance 2 of Fig. 1, exciting capacity 4 and stator double-winding asynchronous 1
Control winding stator leakage inductance forms, and a LCL type wave filter, an electricity fewer than common LCL filter are formed in topology
Sense, and capacitance also acts as the effect that excitation is carried out to double-winding AC-DC generator in addition to filter action.LCL type wave filter is compared
In common single L wave filters, due to the low-frequency filter characteristics with three ranks, thus for same harmonic standard and relatively low switch
Frequency, can use relatively small filter inductance to design, and effectively reduce the volume weight of system and reduce loss.
Theoretical according to alternating current generator, the rotor equivalent circuit of double-winding AC-DC generator can use an equivalent simulation resistance
The conversion of asynchronous machine mechanical output and electrical power is represented, as shown in the stator double-winding motor rotor equivalent circuit 19 of Fig. 2.This
A equivalent simulation resistance can serve as the passive damping of LCL type wave filter, play and suppress LCL type wave filter own resonance characteristic
Effect.
The variable-frequency alternating current power generation system vector control method, its operation principle are described as follows：
By coordinate transform, in synchronous rotating frame (dq coordinate systems), equivalent dc motor mould can be obtained
Type, in the model, the magnetic linkage control and direct torque of motor can realize decoupling, so as to establish respectively Controlling model into
Row magnetic linkage and direct torque, achieve the purpose that to control motor stabilizing reliability service.
Fig. 3 is the principle of vector control figure of the variable-frequency alternating current power generation system control method, and method includes the following steps：
Step 1, the output of dual stator-winding induction generator power winding side is calculated to obtain according to AC voltage sensor measured value
Alternating voltage virtual value up, stator flux of motor set-point is calculated using formula (1)
Wherein：Represent the given virtual value of power winding output AC voltage, ψ0Expression system is in quiescent point
When stator flux of motor estimate；K1For the proportionality coefficient of proportional and integral controller, K2For integral coefficient；P is differential operator,Represent Integral Operator；
Step 2, it is fixed with the synchronous rotating frame of stator magnetic linkage vector oriented, observation to be established using stator flux observer
Sub- magnetic linkage amplitude ψδ, and closed loop feedback adjusting is carried out, obtain d shaft current set-point of the control winding under synchronous coordinate system
As shown in formula (2)：
Wherein：K3For the proportionality coefficient of stator magnetic linkage proportional and integral controller, K4For stator magnetic linkage proportional and integral controller
Integral coefficient,Represent Integral Operator, which forms stator flux regulation device；
Step 3, according to direct current voltage sensor measured value ucDCWith DC voltage set-pointClosed loop feedback adjusting is carried out,
Obtain q shaft current set-point of the control winding under synchronous coordinate systemAs shown in formula (3)：
（3）
Wherein：K5For the proportionality coefficient of direct-current voltage proportion integral controller, K6For direct-current voltage proportion integral controller
Integral coefficient,Represent Integral Operator, which forms DC bus-bar voltage controller；
Step 4, control winding current value is measured using the first AC current sensor, control winding is obtained after coordinate transform
D under synchronous coordinate system, q shaft current isdAnd isq, according to d of the control winding that step 2 and 3 obtain under synchronous coordinate system,
Q shaft current set-pointsWithTo control winding synchronous coordinate system d, q shaft currents carry out closed loop feedback adjusting, controlled
D of the winding processed under synchronous coordinate system, q shaft voltages giveAs shown in formula (4)：
Wherein：K7For the proportionality coefficient of current closed-loop proportional and integral controller, K8For current closed-loop proportional and integral controller
Integral coefficient, ipdThe power winding d shaft current values for measuring and being calculated for the second AC current sensor；
Step 5, the d according to the control winding that step 4 is obtained under synchronous coordinate system, q shaft voltage giveWith it is fixed
The magnetic linkage angle of sub- flux observer measurementUsing Sine Wave Pulse Width Modulation or space vector pulse width modulation, driving power becomes
The switching tube of parallel operation, controls the amplitude and rotating speed of stator double-winding asynchronous stator rotating excitation field, so that control system is normal
Steady operation.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (1)
1. a kind of vector control method of variable-frequency alternating current power generation system, it is characterised in that variable-frequency alternating current power generation system is included by fixed
Sub- double-winding AC-DC generator (1), power inverter (3), filter inductance (2), exciting capacity (4), DC filter capacitor (7) structure
Into main power circuit, the accessory power supply being made of storage battery (5) and diode (6), by direct current voltage sensor (8), exchange
Voltage sensor (9), the first AC current sensor (10), the detection circuit of the second AC current sensor (11) composition, by
The control circuit of controller (12) and drive circuit (13) composition；Wherein：
In the main power circuit, the exchange side series filtering inductance (2) of the power inverter (3) connecting stator double winding afterwards
The control winding of asynchronous generator (1), the exciting capacity (4) are formed with filter inductance (2) and motor stator winding leakage inductance
LCL type wave filter；The LCL type wave filter is used to utilize exciting capacity to dual stator-winding induction generator while filtering
(1) idle excitation is provided；The low pressure small-power accessory power supply is used to provide initial excitation for motor；The detection circuit is used for
DC voltage, exchange side voltage, the ac-side current in the main power circuit are detected, and obtained detected value biography will be detected
Transport to the controller；The controller is controlled using vector control strategy driving power converter；
Include the following steps：
Step 1, according to AC voltage sensor measured value calculate dual stator-winding induction generator power winding side export friendship
Flow voltage effective value up, stator flux of motor set-point is calculated using formula (1)
Wherein：Represent the given virtual value of power winding output AC voltage, ψ0Expression system is in electricity during quiescent point
Machine stator flux linkage estimation value；K1For the proportionality coefficient of proportional and integral controller, K2For integral coefficient；P is differential operator；
Step 2, established using stator flux observer with the synchronous rotating frame of stator magnetic linkage vector oriented, observe stator magnet
Chain amplitude ψδ, and closed loop feedback adjusting is carried out, obtain d shaft current set-point of the control winding under synchronous coordinate systemSuch as formula
(2) shown in：
Wherein：K3For the proportionality coefficient of stator magnetic linkage proportional and integral controller, K4For the integration of stator magnetic linkage proportional and integral controller
Coefficient；
Step 3, according to direct current voltage sensor measured value ucDCWith DC voltage set-pointClosed loop feedback adjusting is carried out, is obtained
Q shaft current set-point of the control winding under synchronous coordinate systemAs shown in formula (3)：
（3）
Wherein：K5For the proportionality coefficient of direct-current voltage proportion integral controller, K6For the integration of direct-current voltage proportion integral controller
Coefficient；
Step 4, control winding current value is measured using the first AC current sensor, control winding is obtained after coordinate transform same
Walk the d, q shaft currents i under coordinate systemsdAnd isq, according to d of the control winding that step 2 and 3 obtain under synchronous coordinate system, q axis
Given value of current valueWithTo control winding in the d of synchronous coordinate system, q shaft currents carry out closed loop feedback adjusting, obtain controlling around
D of the group under synchronous coordinate system, q shaft voltages giveAs shown in formula (4)：
Wherein：K7For the proportionality coefficient of current closed-loop proportional and integral controller, K8For the integration of current closed-loop proportional and integral controller
Coefficient, ipdThe power winding d shaft current values for measuring and being calculated for the second AC current sensor；
Step 5, the d according to the control winding that step 4 is obtained under synchronous coordinate system, q shaft voltage giveAnd stator magnet
The magnetic linkage angle of chain observer measurementUsing Sine Wave Pulse Width Modulation or space vector pulse width modulation, driving power converter
Switching tube, the amplitude and rotating speed of stator double-winding asynchronous stator rotating excitation field are controlled, so that control system normal table
Work.
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| CN105610290B (en) * | 2016-01-19 | 2018-01-12 | 南京航空航天大学 | A kind of low noise Induction Motor System, control system and control method peculiar to vessel |
| CN105634228B (en) * | 2016-01-21 | 2017-11-14 | 南京航空航天大学 | Five phase dual stator-winding induction generators and its parameter optimization method |
| CN106647687A (en) * | 2016-09-07 | 2017-05-10 | 西北工业大学 | Simulation loading test method for brushless permanent magnet motor driving controller |
| CN112838800B (en) * | 2021-03-12 | 2021-10-22 | 南京航空航天大学 | Current prediction control method of double-winding induction generator system |
| CN114629397B (en) * | 2022-01-18 | 2024-02-20 | 上海理工大学 | Load self-adaptive control method for double-winding induction motor power generation system |
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| CN103259476A (en) * | 2013-04-23 | 2013-08-21 | 南京航空航天大学 | Frequency conversion alternating current generation system control method with voltage harmonic suppression function |
| CN104320027A (en) * | 2014-09-25 | 2015-01-28 | 南京航空航天大学 | Control method of parallel winding open permanent magnet generator system |
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