CN104052356B - Variable speed constant frequency generator control device and electricity-generating method based on brushless dual-feed motor - Google Patents
Variable speed constant frequency generator control device and electricity-generating method based on brushless dual-feed motor Download PDFInfo
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Abstract
The present invention relates to a kind of variable speed constant frequency generator control device and electricity-generating method based on brushless dual-feed motor.The power-generating control system being controlled including double PWM frequency conversion systems and to double PWM frequency conversion systems, power-generating control system includes setup unit, power winding voltages detection unit, controling winding current detecting unit, outer voltage controller, current inner loop controller and pll controller, the outer voltage controller, current inner loop controller and pll controller, drive PWM rectifier and PWM inverter to realize system speed-variable constant frequency generation according to Frequency conversion control mode.Present invention employs vector control mode, Dual-loop feedback control control method and phase locking loop controlling method, even if load or motive power change and cause the fluctuation of speed, remain to by the electric current and frequency of accurate adjustment brushless dual-feed motor controling winding, the voltage magnitude and frequency of the generating of power winding side is set to keep stabilization, control process is simple, is adapted to widely use.
Description
Technical field
It is more particularly to a kind of to be based on brushless double feed the present invention relates to a kind of variable speed constant frequency generator control device and electricity-generating method
The variable speed constant frequency generator control device of motor.
Background technology
In variable speed constant frequency generator system, there is brush double feedback electric engine because motor control is simple, system using AC excitation technology
The advantages of making technology maturation extensive application, yet with the presence of brush double feedback electric engine brush, is easily damaged, it is difficult to safeguard.
In order to overcome above mentioned problem, brushless dual-feed motor starts to be paid close attention to by people, and this brushless dual-feed motor eliminates brush and slip ring
Structure, has the advantages that easy to maintenance, control accuracy is high, dependable performance.Further, since the stator winding of brushless dual-feed motor can
With double-fed, therefore when as ac adjustable speed motor, it is only necessary to which controling winding provides slip power, so as to substantially reduce control
The capacity of frequency converter, reduces system cost in device processed；And, by selecting suitable rotor number of poles by make synchronous turning
Speed is very low, is therefore particularly suited for wind-force, shaft generator etc..In stand alone generating system, this motor is gradually applied,
Therefore now in the urgent need to researching and developing a kind of control device of the brushless dual-feed motor applied in stand alone generating system.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of variable speed constant frequency generator control based on brushless dual-feed motor
Device and electricity-generating method, are solved in the prior art on being carried out being difficult to during variable speed constant frequency generator using brushless dual-feed motor
The technical problem of control.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of variable speed constant frequency hair based on brushless dual-feed motor
Controller for electric consumption, the brushless dual-feed motor includes power winding, controling winding and rotor windings, and the power winding constitutes only
The generating winding of vertical power network, the variable speed constant frequency generator control device includes double PWM frequency conversion systems and to described pair of PWM frequency conversions system
System carries out the power-generating control system of VFC, and described pair of PWM frequency conversion system includes PWM rectifier and PWM inverter, described
PWM inverter output end is connected with the controling winding of the brushless dual-feed motor, the electricity for adjusting the controling winding side
Pressure and frequency；The power-generating control system includes setup unit, power winding voltages detection unit, controling winding current detecting list
Unit, SVPWM adjustment units, outer voltage controller, current inner loop controller and pll controller,
The setup unit is used to set the idle instruction current in controling winding side, power network reference voltage and power network with reference to frequency
Rate, the power network reference voltage is power winding side reference voltage, and the power network reference frequency is power winding side reference frequency；
The power winding voltages detection unit is used to sample the power winding side output voltage, and by the power around
Group side output voltage is transferred to the outer voltage controller；
The controling winding current detecting unit is used for controling winding side three-phase current of sampling, and by coordinate transform
Controling winding side three-phase current is converted into merit feedback current and idle feedback current is transferred to the current inner loop control
Device processed；
The outer voltage controller is used to enter the power network reference voltage of power winding side feedback voltage and the setting
Row compares regulation, and exports active instruction current to the current inner loop controller；The power winding side feedback voltage is institute
State the virtual value of power winding side output voltage；
The current inner loop controller is used to for the active instruction current and the merit feedback current to be compared tune
Section, and export active command voltage to SVPWM adjustment units；And for by the nothing of the idle feedback current and the setting
Work(instruction current compares and adjusts and export idle command voltage to SVPWM adjustment units；
The SVPWM adjustment units are connected with the PWM inverter, will be described active for use vector control method
Command voltage and idle command voltage synthesize the instruction for controlling PWM inverter to switch；
The pll controller, for being oriented with the power network reference voltage, by the phase for comparing power network reference voltage
Position and the phase of power winding side output voltage, regulation controling winding side frequency, follow the trail of the power winding side output frequency
The power network reference frequency of setting.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the outer voltage controller includes the first subtracter and the first pi regulator that are connected, described the
One subtracter is used to compare the power winding side feedback voltage and the power network reference voltage, and output voltage comparative result is extremely
First pi regulator；First pi regulator is used to be adjusted the comparative result, and exports active instruction electricity
It flow to the current inner loop controller.
Further, the current inner loop controller includes the second subtracter, the second pi regulator, the 3rd subtracter and the 3rd
Pi regulator,
Second subtracter is connected with the first pi regulator output end, for comparing the active instruction current
With the merit feedback current, and output watt current comparative result is to second pi regulator；
Second pi regulator, for being adjusted to the comparative result, and exports active command voltage to described
SVPWM adjustment units；
3rd subtracter is used to compare the idle instruction current and the idle feedback current, and exports idle electricity
Flow comparative result to the 3rd pi regulator；
3rd pi regulator, for being adjusted to the comparative result, and exports idle command voltage to described
SVPWM adjustment units.
Further, the pll controller includes rotor frequency measuring unit, first integrator, the 4th subtracter, the
Four pi regulators, the 5th subtracter and the 6th subtracter,
The rotor frequency measuring unit, for measuring the equivalent rotor frequency of the brushless dual-feed motor, and will be described etc.
Effect rotor frequency is sent to the 5th subtracter；
The first integrator connects the setup unit, raw for being integrated conversion to the power network reference frequency
Into power network fixed phase, and the power network fixed phase is sent to the 4th subtracter；The power network reference frequency is setting
The frequency desired value of isolated power network；
4th subtracter connects the first integrator, for compare the power network fixed phase and the power around
The actual phase of group side output voltage, and export comparative result to the 4th pi regulator；
The 4th pi regulator input connects the 4th subtracter, for being adjusted to the comparative result,
And output frequency variable quantity is to the 6th subtracter；
5th subtracter connects the rotor frequency measuring unit and setup unit respectively, for described equivalent turn
Sub- frequency and computing is carried out to the power network reference frequency generate the 5th subtraction result, and by the 5th subtraction knot
Fruit is sent to the 6th subtracter；
6th subtracter connects the 5th subtracter and the 4th pi regulator respectively, for the 5th subtraction
Operation result and the frequency variation carry out computing and generate the 6th subtraction result, and the 6th subtraction result is control
Winding side reference frequency processed.
The controling winding side reference frequency is sent to by the PWM inverter by SVPMM adjustment units, by brushless
Double feedback electric engine internal magnetic field modulating action, makes the power winding side output frequency follow the trail of the power network reference frequency of setting.
Further, described pair of PWM frequency conversion system also includes first contactor, second contactor, grid-connected reactor, precharge
Circuit and DC energy storage unit,
The input of the first contactor is connected with power network, and output end connects the grid-connected reactor and second respectively
Contactor；
The input of the second contactor is connected with the output end of the first contactor, the second contactor
Output end connects the power winding of the brushless dual-feed motor；
The input of the grid-connected reactor connects the first contactor, and the output end of the grid-connected reactor passes through institute
State pre-charge circuit and connect the PWM rectifier；
The DC energy storage unit, bridges between PWM rectifier and PWM inverter.
The pre-charge circuit can realize PWM rectifier soft start, be driven by brushless double feed power-generating control system, by inspection
Survey DC voltage to judge whether to close internal main contactor, so as to protect the switching device and DC energy storage inside PWM rectifier
Electric capacity.
Further, the power-generating control system also includes contactor control unit, and the contactor control unit is used to control
Make being opened or closed for the first contactor and the second contactor.
Further, the power-generating control system also includes CAN/SCI communication units, and the CAN/SCI communication units are used for
The running status variable and failure variable of the variable speed constant frequency generator control device are uploaded into keyboard or host computer；The operation
Electric current, voltage, rotating speed, frequency and/or temperature when state variable refers to that the variable speed constant frequency generator control device runs；The event
Hinder excessively stream when variable refers to that variable speed constant frequency generator control device runs, overvoltage, overload and/or cross thermal information.
A kind of variable speed constant frequency generator method based on brushless dual-feed motor, the electricity-generating method is using described variable speed constant frequency
Power generation control, comprises the following steps：
Step 1, closes the first contactor, and capacitance voltage rises in the DC energy storage unit, the variable speed constant frequency
Power generation control brings into operation；
Step 2, whether capacitance voltage arrives pickup value in judging the DC energy storage unit, if being not reaching to pickup value,
System failure information is sent to host computer；If reaching pickup value, the switch of pre-charge circuit is closed；
Step 3, sets power network reference voltage and the idle instruction current in controling winding side, sampled power winding side output voltage
With controling winding side electric current, using vector control mode and by outer voltage and the Dual-loop feedback control method of current inner loop, adjust
Whole controling winding side voltage, makes the power network reference voltage that power winding side output voltage stabilization is the setting；
Step 4, sets power network reference frequency, the frequency of rotor windings of sampling, using vector control mode and by locking phase
Ring feedback method, adjustment controling winding side frequency makes power winding side output frequency stabilize to the power network of the setting with reference to frequency
Rate；
Step 5, after operation a period of time, after power winding side output voltage and output frequency temperature is detected, disconnects
The first contactor, closes the second contactor, continual and steady to generate electricity；
Step 6, when stopping generating electricity, closes the PWM inverter and PWM rectifier, then disconnect the first contactor and
Second contactor.
Further, the step 3 is specially：
The S301 settings idle instruction current in controling winding side, power network reference voltage and power network reference frequency, the power network ginseng
It is power winding side reference voltage and power winding side reference frequency to examine voltage and power network reference frequency；
The S302 samplings power winding side output voltage；
S303 sampling controling winding side three-phase currents, and be converted to the three-phase current by coordinate transform active
Feedback current and idle feedback current；
The power network reference voltage of the power winding side feedback voltage and the setting is compared regulation by S304, and defeated
Go out active instruction current；The power winding side feedback voltage is the virtual value of the power winding side output voltage；
Active instruction current described in S305 and the merit feedback current are compared regulation, and export active instruction electricity
Pressure；The idle feedback current and the idle instruction current of the setting compare and adjust and export idle command voltage；
S306 uses vector control method, and the active command voltage and idle command voltage are synthesized for controlling
The instruction of PWM inverter switch, by the PWM inverter, adjustment controling winding side voltage makes power winding side output voltage
Stabilize to the power network reference voltage of the setting.
Further, the step 4 is specially：
The S401 measurements brushless double-fed machine rotor electricity frequency obtains equivalent rotor frequency；
S402 is integrated conversion to the power network reference frequency, generates power network fixed phase；The power network reference frequency
It is the frequency desired value of the isolated power network of setting；
The actual phase of the S403 power network fixed phases and the power winding side output voltage, and output compare
As a result；
S404 is adjusted to the comparative result, and output frequency variable quantity；
S405 carries out computing to the equivalent rotor frequency and to the power network reference frequency and generates the 5th subtraction knot
Really；
S406 carries out add operation to the 5th subtraction result and the frequency variation and generates the 6th subtraction knot
Really, the 6th subtracter operation result is controling winding side reference frequency；
The controling winding side reference frequency is sent to the PWM inverter by S407 by SVPMM adjustment units, is passed through
Brushless dual-feed motor internal magnetic field modulating action, makes the power winding side output frequency follow the trail of the power network reference frequency of setting.
The beneficial effects of the invention are as follows：Variable speed constant frequency generator control device of the invention is a kind of high-performance, control essence high
Degree, the variable speed constant frequency generator control device of high-intelligentization, employ vector control mode, Dual-loop feedback control control method and lock phase
Ring control method, in the case where load or motive power change cause the fluctuation of speed, by precise control brushless dual-feed motor control
The voltage and frequency of winding processed, make power winding side Independent Power Generation voltage magnitude and frequency keep stabilization.
Brief description of the drawings
Fig. 1 is the structural representation of brushless double feed variable speed constant frequency generator control device of the present invention；
Fig. 2 is brushless double feed variable speed constant frequency generator control device vector controlled schematic diagram of the present invention；
Fig. 3 is that brushless double feed variable speed constant frequency generator control device of the present invention locks phase control schematic diagram；
Fig. 4 is brushless double feed variable speed constant frequency generator control device outer voltage control schematic diagram of the present invention；
Fig. 5 is brushless double feed variable speed constant frequency generator control device current inner loop control schematic diagram of the present invention.
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
The present embodiment according to the theory in alternating current generator in terms of winding " slot ripples " magnetomotive force, for above-mentioned motor,
Power frequency AC is accessed on power winding, when controling winding accesses variable-frequency power sources, rotor windings can simultaneously produce Pp and Pc
Two kinds of number of pole-pairs rotating mmfs, power winding magnetomotive force rotating speed is：
N=60*fp/Pp, wherein fpIt is power winding side frequency；
The magnetomotive force rotating speed of controling winding is：
N=60*fc/Pc, wherein fcIt is the frequency of controling winding side；
And in both magnetomotive direction of rotation conversely, under the effect of both rotating mmfs, steady timer rotor turns
Speed is：
N=60* (fp±fc)/(Pp+Pc),
So as to the variable speed constant frequency generator of brushless dual-feed motor can be realized by the VFC to controling winding.
As shown in Figure 1 for Generation Control of the present invention connection diagram, brushless dual-feed motor of the invention include control around
Group, power winding and rotor windings, power winding have a number of pole-pairs Pp, the power winding constitute the generating of isolated power network around
Group；Controling winding, with number of pole-pairs Pc, is connected with PWM inverter；Rotor windings, are connected by mechanical rotating shaft with motive power
Connect, line voltage is power winding side voltage.
The variable speed constant frequency generator control device of the present embodiment includes PWM rectifier, and its input is connected with pre-charge circuit
Connect, output end is connected with DC energy storage unit；First contactor, its input is connected with power network, exports and grid-connected reactance
Device is connected, and the first contactor can also control it to close or disconnect by brushless double feed power-generating control system；Grid-connected electricity
Anti- device, input is connected with first contactor unit, and output end is connected with pre-charge circuit；Pre-charge circuit, for filling
The soft start put, its input is connected with grid-connected reactor, and output end is connected with PWM rectifier；DC energy storage unit, bridge
It is connected between PWM rectifier and PWM inverter；PWM inverter, output end is connected with brushless dual-feed motor controling winding；The
Two contact units, its input is connected with first contactor output, and output is connected with brushless double-fed acc power winding, the contact
Device can also control it to close or disconnect by brushless double feed power-generating control system；Controling winding current detecting unit, for right
Controling winding three-phase current detected, and the three-phase current is converted into merit feedback current and idle by coordinate transform
Feedback current, as shown in Figure 2；Power winding voltages detection unit, for being detected to power winding three-phase output voltage；Turn
Sub- frequency measurement unit, the frequency for detecting brushless dual-feed motor rotor windings；The brushless double feed power-generating control system, energy
PWM rectifier and PWM inverter is driven to realize variable speed constant frequency generator；Can be by driving the first contactor and second contactor
The start-stop for generating electricity is realized, the state and failure variable that can be run variable speed constant frequency generator control device upload to keyboard or upper
Machine, additionally, brushless double feed power-generating control system also includes：Outer voltage controller, current inner loop controller and phase lock control
Device.
On the basis of this implementation structure is basically unchanged, power network power supply unit can be directly accessed local electric power, power network three
Phase output terminal is to PWM rectifier power output.
Encoder is provided with rotor frequency measuring unit in the electrical motor gearshift constant frequency generation control system of the present embodiment,
The rotor frequency measuring unit is joined directly together with the axle of the brushless dual-feed motor, for exporting and the brushless dual-feed motor
Rotor the related information in position, the information exported using encoder can determine the speed of rotor, and rotor mmf
Phase angle.Specifically, encoder may be mounted on the axle of motor.
PWM rectifier and PWM inverter in the variable speed constant frequency generator control device of the present embodiment, in offer system
Two-way energy flow, can also provide electric current for brushless dual-feed motor controling winding side.The alternating current that PWM rectifier will be input into
Galvanic current is converted into, the two-way flow of energy in system is can guarantee that, system metasynchronism and supersynchronous generating is realized；Direct current
The output of energy-storage units connection PWM rectifier and the input of PWM inverter, it is ensured that both coordinations and steady operation；PWM inversions
DC voltage is converted into three-phase alternating current by device, and the voltage magnitude and frequency of the three-phase alternating current are all according to Generation Control system
The control instruction change of system, can be the frequency conversion electric current needed for brushless dual-feed motor offer, realize the variable speed constant frequency generator of motor.
In the embodiment, an example course of work of variable speed constant frequency generator control device includes：Closure first contactor,
The capacitance voltage of DC energy storage unit rises, and variable speed constant frequency generator control device is started working；Judge the DC energy storage unit
Whether middle capacitance voltage arrives pickup value, if being not reaching to pickup value, system is under-voltage, and system failure information is sent to host computer；
If the voltage on storage capacitor reaches operating point, the main contactor closure in pre-charge circuit is driven.Setting power network reference
The idle instruction current of voltage and controling winding side, sampled power winding side output voltage and controling winding side electric current, using vector
Control mode and the Dual-loop feedback control method for passing through outer voltage and current inner loop, adjustment controling winding side voltage, make power around
Group side output voltage stabilization is the power network reference voltage of the setting；Setting power network reference frequency, the frequency of rotor windings of sampling,
Using vector control mode and by phaselocked loop feedback method, adjustment controling winding side frequency makes power winding side output frequency
Stabilize to the power network reference frequency of the setting.After operation a period of time, when detecting power winding side output voltage and output
After frequency stabilization, the first contactor is disconnected, close the second contactor, it is continual and steady to generate electricity.If external impetus are big
Small change, brushless dual-feed motor rotating speed changes, and variable speed constant frequency generator control device can guarantee that power winding side voltage magnitude
Constant with frequency substantially constant, when halt instruction is detected, then first block PWM inverter and PWM rectifier drive, then disconnect the
One contactor and second contactor；
PWM inverter adjusts the size of output current come regulated output voltage by situation about loading in the present embodiment.This
PWM inverter realizes variable speed constant frequency generator in embodiment, and the one example course of work includes outer voltage controller and electric current
Interior ring controller.As shown in figure 4, outer voltage controller sampled power winding side feedback voltage V fed, the power network with a setting
Reference voltage Vref is compared and adjusts and export watt current instruction Icmref, and specifically, power network reference voltage can take
Rated voltage such as 380V needed for load, power winding side feedback voltage can be by sampled power winding side three-phase output voltage, so
After seek virtual value.
Specifically, outer voltage controller includes the first subtracter and the first pi regulator, wherein, the first subtracter ratio
Compared with power winding side feedback voltage and the power network reference voltage of setting；The comparing knot that first pi regulator is exported to the first subtracter
Fruit carries out PI regulations, and exports active instruction current Icmref.
As shown in figure 5, current inner loop controller is on the one hand by active instruction current Icmref and merit feedback current Icm ratios
Active command voltage Vcm is relatively adjusted and exports, on the other hand by the idle instruction current Ictref and idle feedback of outside input
Electric current Ict compares and adjusts and export idle command voltage Vct, wherein, in the present embodiment, idle instruction current Ictref takes 0.
Specifically, current inner loop controller includes the second subtracter and the second pi regulator, and the 3rd subtracter
With the 3rd pi regulator, wherein：Second subtracter is connected with the output end of the first pi regulator, and relatively more active instruction current
Icmref and merit feedback current Icm；Second pi regulator carries out PI regulations to the comparative result that the second subtracter is exported, and defeated
Go out active command voltage Vcm to SVPWM adjustment units；3rd subtracter is more idle instruction current Ictref and idle feedback electricity
Stream Ict；3rd pi regulator carries out PI regulations to the comparative result that the 3rd subtracter is exported, and exports idle command voltage Vct
To SVPWM adjustment units.SVPWM adjustment units by the active command voltage Vcm and idle command voltage Vct synthesize for
The command voltage of control PWM inverter switch, so as to adjust controling winding side voltage, makes the power winding side output voltage stabilization be
The power network reference voltage of the setting.
Pll controller should also be included by variable speed constant frequency generator control device in embodiment, as shown in figure 3, phaselocked loop control
Device processed, the frequency of energy accurate power control winding side output voltage can also determine that controling winding side is joined by internal arithmetic in addition
The electric voltage frequency fc and equivalent rotor frequency fr of brushless dual-feed motor is examined, the pll controller includes that rotor frequency is measured
Unit, first integrator, the 4th subtracter, the 4th pi regulator, the 5th subtracter and the 6th subtracter,
The rotor frequency measuring unit, equivalent rotor is obtained for measuring the equivalent rotor frequency of the brushless dual-feed motor
Frequency fr, and the equivalent rotor frequency fr is sent to the 5th subtracter；
The first integrator connects the setup unit, for being integrated change to the power network reference frequency frefp
Change, generate power network fixed phase θ refp, and the power network fixed phase θ refp are sent to the 4th subtracter；The power network ginseng
Frequency is examined to be set as isolated power network frequency desired value frefp；
4th subtracter connects the first integrator, for comparing power network fixed phase θ refp and described
The actual phase θ p of power winding side output voltage, and export comparative result to the 4th pi regulator；
4th pi regulator connects the 4th subtracter, for being adjusted to the comparative result, and exports
Frequency variation is to the 6th subtracter；
5th subtracter connects the rotor frequency measuring unit and setup unit respectively, for described equivalent turn
Sub- frequency and computing is carried out to the power network reference frequency generate the 5th subtraction result, and by the 5th subtraction knot
Fruit is sent to the 6th subtracter；
6th subtracter connects the 5th subtracter and the 4th pi regulator respectively, for the 5th subtraction
Operation result and the frequency variation carry out computing and generate the 6th subtraction result, and the 6th subtraction result is control
Winding side reference frequency fc processed；
The controling winding side reference frequency is sent to by the PWM inverter by SVPMM adjustment units, by brushless
Double feedback electric engine internal magnetic field modulating action, makes the power winding side output frequency follow the trail of the power network reference frequency of setting.
The present embodiment employs Frequency conversion control mode and PWM inverter output voltage amplitude and output voltage frequency is entered
Row regulation, the essence of Frequency conversion control mode is that ac motor is equivalent into dc motor, respectively to speed, magnetic field two
Individual component is independently controlled, and by controlling rotor flux, then decomposes stator current and obtains torque and two, magnetic field component,
Through coordinate transform, orthogonal or uneoupled control is realized, detailed process is that the stator current by asynchronous machine under three phase coordinate systems leads to
Cross three-phase --- two phase inversions, the equivalent alternating current under two-phase rest frame, then by by rotor field-oriented rotation
Then conversion, the equivalent DC current under synchronous rotating frame imitates the control method of dc motor, tries to achieve direct current
The controlled quentity controlled variable of motivation, by corresponding coordinate inverse transformation, realizes the control to asynchronous motor.Due to brushless dual-feed motor vector
Controlling model has at home and abroad had more discussion, does not repeat again here, and in the present embodiment, current phasor is decomposed as described in Figure 2,
Shown Ic is controling winding current phasor, and Icm and Ict is respectively the controling winding current phasor in synchronous rotating frame m/
Two components under t.
Variable speed constant frequency generator control device of the invention is the speed change perseverance of a kind of high-performance, high control precision, high-intelligentization
Take place frequently controller for electric consumption, employs vector control mode, Dual-loop feedback control control method and phase locking loop controlling method, load or
In the case that motive power change causes the fluctuation of speed, by the voltage and frequency of precise control brushless dual-feed motor controling winding,
Power winding side Independent Power Generation voltage magnitude and frequency is set to keep stabilization.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of variable speed constant frequency generator control device based on brushless dual-feed motor, the brushless dual-feed motor include power around
Group, controling winding and rotor windings, the power winding constitute the generating winding of isolated power network, it is characterised in that：The speed change
Constant frequency generation control device includes double PWM frequency conversion systems and the Generation Control of VFC is carried out to described pair of PWM frequency conversion system
System, described pair of PWM frequency conversion system includes PWM rectifier and PWM inverter, and the PWM inverter output end is brushless with described
The controling winding of double feedback electric engine is connected, voltage and frequency for adjusting the controling winding side；The power-generating control system
Including setup unit, power winding voltages detection unit, controling winding current detecting unit, SVPWM adjustment units, outer voltage
Controller, current inner loop controller and pll controller,
The setup unit is used to set the idle instruction current in controling winding side, power network reference voltage and power network reference frequency, institute
Power network reference voltage is stated for power winding side reference voltage, the power network reference frequency is power winding side reference frequency；
The power winding voltages detection unit is used for sampled power winding side output voltage, and the power winding side is exported
Voltage is transferred to the outer voltage controller；
The controling winding current detecting unit is used for controlling of sampling winding side three-phase current, and by coordinate transform by the control
Winding side processed three-phase current is converted to merit feedback current and idle feedback current is transferred to the current inner loop controller；
The outer voltage controller is used to be compared the power network reference voltage of power winding side feedback voltage and the setting
Relatively adjust, and export active instruction current to the current inner loop controller；The power winding side feedback voltage is the work(
The virtual value of rate winding side output voltage；
The current inner loop controller is used to for the active instruction current and the merit feedback current to be compared regulation, and
Export active command voltage to SVPWM adjustment units；And for by the idle finger of the idle feedback current and the setting
Make electric current compare and adjust and export idle command voltage to SVPWM adjustment units；
The SVPWM adjustment units are connected with the PWM inverter, will be described active for use space vector control method
Command voltage and idle command voltage synthesize the instruction for controlling PWM inverter to switch；
The pll controller, for the power network reference voltage orient, by compare power network reference voltage phase and
The phase of power winding side output voltage, regulation controling winding side frequency, makes the power winding side output frequency follow the trail of setting
Power network reference frequency；
The power-generating control system also includes CAN/SCI communication units, and the CAN/SCI communication units are used for the speed change is permanent
The running status variable and failure variable of controller for electric consumption of taking place frequently uploads to keyboard or host computer；
The pll controller include rotor frequency measuring unit, first integrator, the 4th subtracter, the 4th pi regulator,
5th subtracter and the 6th subtracter,
The rotor frequency measuring unit, for measuring the equivalent rotor frequency of the brushless dual-feed motor, and by described equivalent turn
Sub- frequency is sent to the 5th subtracter；
The first integrator connects the setup unit, for being integrated conversion, generation electricity to the power network reference frequency
Net fixed phase, and the power network fixed phase is sent to the 4th subtracter；The power network reference frequency is the independence of setting
The frequency desired value of power network；
4th subtracter connects the first integrator, for comparing the power network fixed phase and the power winding side
The actual phase of output voltage, and export comparative result to the 4th pi regulator；
The 4th pi regulator input connects the 4th subtracter, for being adjusted to the comparative result and defeated
Go out frequency variation to the 6th subtracter；
5th subtracter connects the rotor frequency measuring unit and setup unit respectively, for the equivalent rotor frequently
Rate and the power network reference frequency is carried out computing generate the 5th subtraction result, and will the 5th subtraction result send out
Give the 6th subtracter；
6th subtracter connects the 5th subtracter and the 4th pi regulator respectively, for the 5th subtraction
Result and the frequency variation carry out computing generate the 6th subtraction result, the 6th subtraction result for control around
Group side reference frequency.
2. variable speed constant frequency generator control device according to claim 1, it is characterised in that：The outer voltage controller bag
The first subtracter and the first pi regulator being connected are included, first subtracter is used to compare the power winding side feedback electricity
Pressure and the power network reference voltage, and output voltage comparative result is to first pi regulator；First pi regulator is used
It is adjusted in the comparative result, and exports active instruction current to the current inner loop controller.
3. variable speed constant frequency generator control device according to claim 2, it is characterised in that：The current inner loop controller bag
The second subtracter, the second pi regulator, the 3rd subtracter and the 3rd pi regulator are included,
Second subtracter is connected with the first pi regulator output end, for comparing the active instruction current and institute
State merit feedback current, and output watt current comparative result is to second pi regulator；
Second pi regulator, for being adjusted to the comparative result, and exports active command voltage to the SVPWM
Adjustment unit；
3rd subtracter is used to compare the idle instruction current and the idle feedback current, and exports reactive current ratio
Relatively result is to the 3rd pi regulator；
3rd pi regulator, for being adjusted to the comparative result, and exports idle command voltage to the SVPWM
Adjustment unit.
4. according to any described variable speed constant frequency generator control device of claims 1 to 3, it is characterised in that：Described pair of PWM frequency conversion
System also includes first contactor, second contactor, grid-connected reactor, pre-charge circuit and DC energy storage unit,
The input of the first contactor is connected with power network, and output end connects the grid-connected reactor and the second contact respectively
Device；
The input of the second contactor is connected with the output end of the first contactor, the output of the second contactor
The power winding of the end connection brushless dual-feed motor；
The input of the grid-connected reactor connects the first contactor, and the output end of the grid-connected reactor is by described pre-
Charging circuit connects the PWM rectifier；
The DC energy storage unit, bridges between PWM rectifier and PWM inverter.
5. variable speed constant frequency generator control device according to claim 4, it is characterised in that：The power-generating control system is also wrapped
Include contactor control unit, the contactor control unit is used to controlling the disconnected of the first contactor and the second contactor
Open or close.
6. a kind of variable speed constant frequency generator method based on brushless dual-feed motor, the variable speed constant frequency generator method utilizes claim
Variable speed constant frequency generator control device described in 4 or 5, comprises the following steps：
Step 1, closes first contactor, and capacitance voltage rises in the DC energy storage unit, the variable speed constant frequency generator control
Device brings into operation；
Step 2, whether capacitance voltage arrives pickup value in judging the DC energy storage unit, if being not reaching to pickup value, upwards
Position machine sends system failure information；If reaching pickup value, the switch of pre-charge circuit is closed；
Step 3, sets power network reference voltage and the idle instruction current in controling winding side, sampled power winding side output voltage and control
Winding side processed electric current, using vector control mode and by outer voltage and the Dual-loop feedback control method of current inner loop, adjustment control
Winding side processed voltage, makes the power network reference voltage that power winding side output voltage stabilization is the setting；
Step 4, sets power network reference frequency, the frequency of rotor windings of sampling, using vector control mode and anti-by phaselocked loop
Feedback method, adjustment controling winding side frequency, makes power winding side output frequency stabilize to the power network reference frequency of the setting；
Step 5, after operation a period of time, after power winding side output voltage and output frequency stabilization is detected, disconnects first
Contactor, closes second contactor, continual and steady to generate electricity；
Step 6, when stopping generating electricity, closes the PWM inverter and PWM rectifier, then disconnect first contactor and the second contact
Device.
7. variable speed constant frequency generator method according to claim 6, it is characterised in that：The step 3 is specially：
The S301 settings idle instruction current in controling winding side, power network reference voltage and power network reference frequency, the power network is with reference to electricity
Pressure and power network reference frequency are power winding side reference voltage and power winding side reference frequency；
The S302 samplings power winding side output voltage；
S303 sampling controling winding side three-phase currents, and be converted to the three-phase current by coordinate transform active anti-
Supply current and idle feedback current；
The power network reference voltage of the power winding side feedback voltage and the setting is compared regulation by S304, and is exported
Active instruction current；The power winding side feedback voltage is the virtual value of the power winding side output voltage；
Active instruction current described in S305 and the merit feedback current are compared regulation, and export active command voltage；Institute
The idle instruction current for stating idle feedback current and the setting compares and adjusts and export idle command voltage；
S306 uses vector control method, the active command voltage and idle command voltage is synthesized inverse for controlling PWM
Become the instruction of device switch, by the PWM inverter, adjustment controling winding side voltage makes power winding side output voltage stabilization
It is the power network reference voltage of the setting.
8. variable speed constant frequency generator method according to claim 7, it is characterised in that：The step 4 is specially：
The S401 measurements brushless double-fed machine rotor electricity frequency obtains equivalent rotor frequency；
S402 is integrated conversion to the power network reference frequency, generates power network fixed phase；The power network reference frequency is to set
The frequency desired value of fixed isolated power network；
The actual phase of the S403 power network fixed phases and the power winding side output voltage, and knot is compared in output
Really；
S404 is adjusted to the comparative result, and output frequency variable quantity；
S405 carries out computing to the equivalent rotor frequency and to the power network reference frequency and generates the 5th subtraction result；
S406 carries out computing to the 5th subtraction result and the frequency variation and generates the 6th subtraction result, described
6th subtraction result is controling winding side reference frequency；
The controling winding side reference frequency is sent to the PWM inverter by S407 by SVPMM adjustment units, by nothing
Brush double feedback electric engine internal magnetic field modulating action, makes the power winding side output frequency follow the trail of the power network reference frequency of setting.
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| CN105529976B (en) * | 2014-09-29 | 2018-04-24 | 华中科技大学 | The brushless double feed generator output frequency control method of position-sensor-free |
| CN105553352A (en) * | 2015-12-31 | 2016-05-04 | 易事特集团股份有限公司 | Low-cost starting device for brushless doubly-fed motor |
| CN105577065B (en) * | 2015-12-31 | 2018-06-26 | 易事特集团股份有限公司 | Brushless dual-feed motor asynchronous starting method and apparatus |
| CN106208883A (en) * | 2016-08-10 | 2016-12-07 | 北京国电四维清洁能源技术有限公司 | Phase-wound rotor brushless double-fed motor non-impacting start device and startup method |
| CN107968606A (en) * | 2017-12-12 | 2018-04-27 | 湖南利能科技股份有限公司 | A kind of diesel-driven generator electricity generation system and control method based on brushless dual-feed motor |
| CN108054967B (en) * | 2017-12-25 | 2020-06-02 | 易事特集团股份有限公司 | Brushless double-fed motor-based diesel power generation system and control method thereof |
| CN108390406A (en) * | 2018-02-05 | 2018-08-10 | 易事特集团股份有限公司 | Wind generator system based on brushless dual-feed motor and its control method |
| CN108258731A (en) * | 2018-03-13 | 2018-07-06 | 西南交通大学 | A kind of new-type brushless double feed wind generator system with super conductive magnetic storage energy |
| CN108448969B (en) * | 2018-03-14 | 2019-11-12 | 华中科技大学 | The control system of independent brushless double feed generator under a kind of nonlinear load |
| CN109245642B (en) * | 2018-09-29 | 2020-06-30 | 深圳市英威腾电气股份有限公司 | Control method, system and equipment for high-voltage brushless dual-feeder and readable storage medium |
| CN115333429B (en) * | 2022-08-02 | 2024-01-30 | 东莞叁壹半导体科技有限公司 | Method and device for detecting initial angle of brushless doubly-fed motor rotor and starting method |
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