CN108011535B - A kind of three-phase rectifier electric current phase shift Zero-crossing Distortion modification method - Google Patents
A kind of three-phase rectifier electric current phase shift Zero-crossing Distortion modification method Download PDFInfo
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- CN108011535B CN108011535B CN201711368128.3A CN201711368128A CN108011535B CN 108011535 B CN108011535 B CN 108011535B CN 201711368128 A CN201711368128 A CN 201711368128A CN 108011535 B CN108011535 B CN 108011535B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The correction strategy of the current over-zero distortion for the unidirectional three-phase rectifier (connecing cascade connection type three-phase rectifier topology without bridge rectifier and all stars including three-phase VIENNA rectifier, three-phase) that the present invention provides a kind of suitable for all based on one circle control.Specifically includes the following steps: determining the relevant parameter of system first, then calculating current distortion starting point, distortion time and boundary condition, finally introduce compensation rate based on the above calculating parameter.The characteristics of present invention is according to monocycle Direct Current Control, by carrying out intersection injection to electric current phase-shifted control signal feedback, and it is overlapped with former phase shift feedback quantity, to which under the premise of not increasing system complexity, the Zero-crossing Distortion generated to energy one-way flow three-phase rectifier electric current phase shift is modified.The present invention realizes that simply, high reliablity, the current over-zero aberration problems to occur during one circle control provide a kind of effective modification method, have widened the application range of one circle control.
Description
Technical field
The present invention relates to power electronics and power system automatic field, in particular to a kind of energy based on one circle control
Measure one-way flow three-phase rectifier electric current phase shift Zero-crossing Distortion correction strategy.
Background technique
Since in considerable practical application in industry, energy does not need to flow in both direction, energy is not needed such as
The blower of feedback, pumping motor energy-saving speed regulating and automobile, ship and aviation charging station etc..Therefore energy one-way flow in recent years
Rectifier received significant attention in power electronics field.Compared to the rectifier of energy one-way flow, energy bidirectional flow
Dynamic rectifier has used more wholly-controled device, causes circuit control complicated, system stability is poor, and project cost significantly mentions
Height, thus clear superiority is had no in the above occasion.The rectifier of energy one-way flow is with its less wholly-controled device, relatively
Simple control circuit and higher system stability, and the cost of the rectifier half close to energy in bidirectional flow can be real
Now same function has embodied apparent application advantage.Wherein the three-phase rectifier of energy one-way flow is close with its high power
Degree and high efficiency, it is applied widely, thus more concerns are received, application and control technology are obtained in recent decades
Significant progress.
But the rectifier of many energy one-way flows, as three-phase VIENNA rectifier, three-phase without bridge rectifier and own
Star connects cascade connection type three-phase rectifier topology, due to the presence of input side inductance, substantially cannot achieve the specific work of real meaning
The operation of rate factor, inductive current only lag supply voltage some suitable angle (angle depend on inductance value with
And load current size) when, it can be run with sinusoidal waveform, therefore when electric current is with leading power factor, lagging power-factor
When (lag angle is greater than initial sinusoids electric current lag angle) or unity power factor are run, electric current can all be produced near zero-crossing point
Raw distortion, in response to the above problems, does not have effective solution scheme still at present.Therefore harmonic pollution in electric power net caused by, system are stablized
Property decline and the problems such as service life reduction all seriously constrain the rectifier development and application of energy one-way flow.And current distortion is asked
Topic is especially prominent in the three-phase rectifier of energy one-way flow, because the Zero-crossing Distortion of each phase current can all make other two-phase electricity
Stream also generates corresponding distortion, thus the harm for expanding current distortion at double simultaneously.Therefore, it is quite necessary to propose one kind
It can effectively solve the problem that the three-phase rectifier current over-zero aberration problems of energy one-way flow, and can be a large amount of in actual application
The control strategy used.
Summary of the invention
Simple the purpose of the present invention is designing a kind of realization, high reliablity does not need filter, phaselocked loop and voltage sensor
The method that device can inhibit the three-phase rectifier current over-zero of energy one-way flow to distort under any phase shift of electric current.
In order to achieve the above objectives, a kind of energy one-way flow three-phase rectifier based on one circle control provided by the invention
Electric current phase shift Zero-crossing Distortion correction strategy, control algolithm corresponding with this control strategy include phase shift block, absolute value block,
Carrier wave generation module, sign function generation module, computing module, clipping module, injection module and multi-path choice module.The present invention
It refers specifically to:
It is characterized by: (phase of inductive current is ahead of the commutating phase device at this time when a certain phase inductance current over-zero
The phase of input terminal voltage fundametal compoment), or (the inductance electricity at this time when a certain commutating phase device input terminal voltage fundametal compoment zero passage
The phase of stream lags behind the phase of the commutating phase device input terminal voltage fundametal compoment), to other biphase current phase-shifted control signals
Absolute valueInject the distortion compensation Injection Current signal i for crossing Zero-phase currentx0(x=A, B, C) is constituted
Electric current reconstructing controls signal iRx(x=A, B, C), the positive and negative electric current phase shift control by being applied phase of distortion compensation Injection Current signal
The through direction of the electric current phase-shifted control signal of the direction of signal processed and the zero passage phase codetermines, the letter of electric current reconstructing control later
Number iRxThe amplitude generated again with outer voltage output steady-state value is UmCarrier wave compare, and then generate driving signal, it is final to inhibit
The Zero-crossing Distortion that three-phase current phase shift generates in energy one-way flow three-phase rectifier.
A kind of energy one-way flow three-phase rectifier electric current phase shift Zero-crossing Distortion based on one circle control corrects plan
Slightly steps are as follows:
(1) compensation point is determined: by the rectifier feature of energy one-way flow it is found that when current over-zero, rectifier at this time
Input terminal voltage also must be reversed with electric current, therefore rectifier is unless its input current works in some suitable angle of lag
Degree, otherwise its input terminal by no longer can direction needed for generative circuit voltage, lead to current distortion, therefore, compensation point and rectification
The fundametal compoment zero crossing of device input terminal voltage is related with the sequencing of inductive current zero crossing:
It, should be in inductive current zero crossing when the fundametal compoment phase of the advanced rectifier input voltage of inductive current phase
It starts compensating for；It, should be in rectifier input when the fundametal compoment phase of inductive current delayed phase rectifier input voltage
The fundametal compoment zero crossing of voltage starts compensating for.
(2) the compensation time: known u is determinedA、uB、uCFor the supply voltage of three-phase equilibrium, ω is power supply angular frequency,
For supply voltage amplitude, then:
Lx(x=A, B, C) is input side three pole reactor, and three pole reactor value is answered equal in engineering, it may be assumed that
LA=LB=LC=L
(a) inductive current after hypothesis phase shiftIt is ahead of supply voltageAngle
Value is θ, at this point, inductive current can carry out resolution of vectors relative to supply voltage, vector in the same direction is known as having with supply voltage
Function componentThe vector vertical with supply voltage is known as reactive componentX represents A, B, C three-phase.Then inductive current can be with table
It is shown as:
If the angle that the fundametal compoment of each commutating phase device input terminal voltage lags behind each phase supply voltage isThen each phase
Angle of lagIt can be expressed asThen each mutually compensation time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
(b) inductive current after hypothesis phase shiftWith supply voltage same-phase, then inductive current distortion angle is each mutually whole
The fundametal compoment of stream device input terminal voltage lags behind the angle of each phase supply voltage, as angleThen each mutually compensation time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
(c) inductive current after hypothesis phase shiftThe angle value for lagging behind supply voltage is θ, at this point, inductive current can phase
Resolution of vectors is carried out for supply voltage, vector in the same direction is known as active component with supply voltageIt is vertical with supply voltage
Vector is known as reactive componentIf the fundametal compoment of each commutating phase device input terminal voltage lags behind the angle of each phase supply voltage
ForThe then lag angle of each phaseIt can be expressed asBased on the angle θ with
There are following three kinds of situations in the relationship at angle, compensation time:
<1>whenWhen, each phase is obtained by phasor diagram and compensates the time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
<2>whenWhen, can obtain each phase compensation time by phasor diagram is zero, i.e. the fundamental wave of rectifier input voltage point
Amount phase is identical as inductive current phase, and inductive current waveform does not distort at this time, therefore the compensation time is zero.
<3>whenWhen, each phase is obtained by phasor diagram and compensates the time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
(3) limiting value of compensation is determined: assuming that the angle γ is inductive current waveform when being sinusoidal waveform (not distorting) inductance electricity
Stream lags behind the angle of supply voltage, based on the above, the limiting value of compensation has following expression:
(a) inductive current is ahead of the angle value of supply voltage for θ, at this point, electric current phase-shifted control signal after assuming phase shiftExpression formula known by phasor diagram, can indicate are as follows:
The differential seat angle that inductive current and electric current phase-shifted control signal can be obtained according to phasor diagram is+2 θ of γ.It is excessively high in order to prevent
Penalty coefficient k cause rectifier control system overshoot, the inductive current for causing rectifier to input generates distortion, therefore need to be to improvement
Modulation wave amplitude in one circle control makees following limitation:
Wherein Um=(UoRs)/(2Z) be systematic steady state when voltage regulator output valve, RsFor inductive current sampling electricity
Resistance, Z are circuit load equivalent impedance, UoFor rectifier DC side output voltage.
(b) assume to make inductive current and supply voltage same-phase by phase shift, at this point, being known by phasor diagram, electric current phase shift
Control signal can be expressed as:
Excessively high penalty coefficient k causes rectifier control system overshoot in order to prevent, the inductance electricity for causing rectifier to input
The raw distortion of miscarriage, therefore need to have following limitation to the modulation wave amplitude in modified one-cycle control:
Wherein Um=(UoRs)/(2Re) be systematic steady state when voltage regulator output valve, RsFor inductive current sampling electricity
Resistance, ReFor circuit load equivalent impedance, UoFor rectifier DC side output voltage.
(c) inductive current lags behind the angle of supply voltage as θ after assuming phase shift, at this point, electric current phase-shifted control signal
Expression formula is known by phasor diagram, can indicate are as follows:
The differential seat angle that inductive current and electric current phase-shifted control signal can be obtained according to phasor diagram is 2 θ-γ.It is excessively high in order to prevent
Penalty coefficient k cause rectifier control system overshoot, the inductive current for causing rectifier to input generates distortion, therefore need to be to improvement
Modulation wave amplitude in one circle control has following limitation:
Wherein Um=(UoRs)/(2Z) be systematic steady state when voltage regulator output valve, RsFor inductive current sampling electricity
Resistance, Z are circuit load equivalent impedance, UoFor rectifier DC side output voltage.
(4) known by (a) in step (2), three pole reactor electric current is i in energy one-way flow three-phase rectifierA、iB、iC, lead to
Cross AC sampling resistance RsTo three pole reactor electric current iA、iB、iCIt is sampled, obtains three pole reactor current sampling signal RsiA、
RsiB、RsiC；
(5) by the three pole reactor current sampling signal R in step (4)siA、RsiB、RsiCIt takes into computing module, generates choosing
Select signal, switching signal and clipping value signal；
(6) by the three pole reactor current sampling signal R in step (4)siA、RsiB、RsiCIt takes into phase shift block, generates three
Phase current phase-shifted control signal i'A、i'B、i'C。
(7) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs the input of multi-path choice module,
To three-phase current phase-shifted control signal i'A、i'B、i'CSelective implantation is carried out, multi-path choice signal, specific control mode are obtained
It is as follows:
If (a) (phase of inductive current is ahead of the commutating phase device input terminal voltage at this time when A phase inductance current over-zero
The phase of fundametal compoment), or (the delayed phase of inductive current at this time when A commutating phase device input terminal voltage fundametal compoment zero passage
In the phase of the commutating phase device input terminal voltage fundametal compoment), then multi-path choice module is by A phase current phase-shifted control signal i'A
It is injected into B phase current phase-shifted control signal i'BNeutralize C phase current phase-shifted control signal i'CIn；
If (b) (phase of inductive current is ahead of the commutating phase device input terminal voltage at this time when B phase inductance current over-zero
The phase of fundametal compoment), or (the delayed phase of inductive current at this time when B commutating phase device input terminal voltage fundametal compoment zero passage
In the phase of the commutating phase device input terminal voltage fundametal compoment), then multi-path choice module is by B phase current phase-shifted control signal i'B
Inject A phase current phase-shifted control signal i'AWith C phase current phase-shifted control signal i'C；
If (c) (phase of inductive current is ahead of the commutating phase device input terminal voltage at this time when C phase inductance current over-zero
The phase of fundametal compoment), or (the delayed phase of inductive current at this time when C commutating phase device input terminal voltage fundametal compoment zero passage
In the phase of the commutating phase device input terminal voltage fundametal compoment), then multi-path choice module is by C phase current phase-shifted control signal i'C
Inject A phase current phase-shifted control signal i'AWith B phase current phase-shifted control signal i'B；
Know that required selection signal is calculated by computing module by step (6)；
(8) using the multi-path choice signal in step (7) as the input of injection switch module, three-phase Injection Current letter is obtained
Number, specific control mode is as follows:
(a) when a certain phase inductance current over-zero, (phase of inductive current is ahead of the commutating phase device input terminal electricity at this time
Press the phase of fundametal compoment), or (the phase of inductive current at this time when a certain commutating phase device input terminal voltage fundametal compoment zero passage
Lag behind the phase of the commutating phase device input terminal voltage fundametal compoment), closure injection switch passes through three-phase Injection Current；
(b) when the switch is closed between be equal to compensation the time when, disconnect injection switch, forbid three-phase Injection Current to pass through；
Know that required switching signal is calculated by computing module by step (7)；
(9) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs sign function module sign
(ix) input, respectively obtain three-phase current phase-shifted control signal i'A、i'B、i'CIn the direction at current time, referred to as three-phase electricity
Phase-shifted control signal mark signal is flowed, specific control mode is as follows:
If (a) value of electric current phase-shifted control signal is greater than 0, the output of sign function module is 1；
If (b) value of electric current phase-shifted control signal is less than 0, the output of sign function module is -1；
If (c) value of electric current phase-shifted control signal is exactly equal to 0, the output of then symbol function module remains a period of time
The output at quarter；
(10) by the three-phase current mark signal in the three-phase Injection Current signal and step (9) in step (8), by multiplying
Musical instruments used in a Buddhist or Taoist mass is multiplied respectively, obtains the three-phase Injection Current signal of tape symbol, referred to as distortion compensation Injection Current signal iA0、iB0、iC0；
(11) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs the input of absolute value block,
Obtain the absolute value signal of three-phase current phase-shifted control signal | i'A|、|i'B|、|i'C|；
(12) by the three-phase current phase shift in the three-phase Injection Current signal of the tape symbol in step (10) and step (11)
Control the absolute value signal of signal | i'A|、|i'B|、|i'C| correspondence is subtracted each other, and three-phase current reconfigurable control signal i is obtainedRx(x=A,
B,C)；
(13) for the control signal not overshoot of Guarantee control system, guarantee system stability, will be obtained in step (12)
Three-phase current reconfigurable control signal be sent into limiter, make signal within the scope of controllable, known by step (5), required limit
Amplitude size is calculated by computing module；
(14) in electronic power convertor DC voltage outer ring, electronic power convertor DC voltage reference valueWith DC side feedback voltage UdPressure difference signal e is exported after subtracteru, euIt indicates are as follows:
Amplitude of output of the pressure difference signal after voltage regulator PI control as carrier signal, from one circle control
UmThere is following expression:
Wherein Z is equivalent load impedance:
Z=Re+j(XL-XC)
(15) the three-phase current reconfigurable control signal in step (13) after clipping, with the amplitude generated by carrier wave generation module
For UmCarrier signal, by comparator carry out signal complete a business transaction generate pwm signal be sent into bus, and then control electronic power conversion
The on-off of switching device in device.
By step (7) to step (12) it is found that the monocycle distortions correction control strategy that this patent is proposed, so that with original
The signal that carrier signal compares is by electric current phase-shifted control signal | i'x| (x=A, B, C) becomes electric current phase-shifted control signal | i'x|
(x=A, B, C) and distortion compensation Injection Current signal ix0Electric current reconstructing after (x=A, B, C) subtracts each other controls signal.Distortion compensation
Injection Current signal can indicate are as follows:
X=A, B, C in formula represent three-phase current, y=A, B, C and y ≠ x.
The current signal compared with carrier signal is redefined at this time, and referred to as electric current reconstructing controls signal iRx(x=A, B,
C), it may be assumed that
iRx=| i 'x|-ix0
It is characterized by: (phase of inductive current is ahead of the commutating phase device at this time when a certain phase inductance current over-zero
The phase of input terminal voltage fundametal compoment), or (the inductance electricity at this time when a certain commutating phase device input terminal voltage fundametal compoment zero passage
The phase of stream lags behind the phase of the commutating phase device input terminal voltage fundametal compoment), to other biphase current phase-shifted control signals
Absolute value | i'x| (x=A, B, C) injection it is positive and negative with distortion compensation Injection Current signal (distortion compensation Injection Current signal
The through direction of the electric current phase-shifted control signal of the positive and negative direction by being applied the electric current phase-shifted control signal of phase and the zero passage phase
Codetermining) identical sinusoidal quantity, cosine amount or constant constitute electric current reconstructing and control signal iRx(x=A, B, C) still is able to press down
The Zero-crossing Distortion that three-phase current phase shift generates in energy one-way flow three-phase rectifier processed.
The present invention has the advantages that control structure is simple, not needing voltage sensor, phaselocked loop, filter be can be realized
The Zero-crossing Distortion of the three-phase rectifier electric current of energy one-way flow can be inhibited under any phase shift of electric current.This control strategy be by
Power network current carries out intersection injection, and circuit is simple in practical projects, it is easy to accomplish.Remain traditional one circle control scheme
The characteristics of without voltage sensor, filter and multiplier, and without increasing additional senser element.Implementation cost is low, can grasp
The property made is strong, has a wide range of application.
It is described in detail below in conjunction with embodiment referring to attached drawing.
Detailed description of the invention
Fig. 1 is a kind of energy one-way flow three-phase rectifier electric current phase shift Zero-crossing Distortion amendment plan based on one circle control
Slightly schematic diagram；
Fig. 2 is that three-phase star connects no bridge rectifier topology；
Fig. 3 is that star connects cascade connection type three-phase rectifier topology；
Fig. 4 is three-phase VIENNA rectifier topology used in the implementation case；
Fig. 5 is another three-phase VIENNA rectifier topology；
Fig. 6 is the advanced phase-shift compensation angle phasor diagram of inductive current；
Fig. 7 is inductive current unity power factor offset angle phasor diagram；
Fig. 8 is that inductive current lags phase-shift compensation angle phasor diagram；
Inductive current and electric current phase-shifted control signal relationship phasor diagram when Fig. 9 is inductive current advanced phase shift；
Figure 10 is inductive current and electric current phase-shifted control signal relationship phasor diagram when inductive current unity power factor is run；
Figure 11 is inductive current and electric current phase-shifted control signal relationship phasor diagram when inductive current lags phase shift；
Figure 12 is uncompensated current simulations waveform and THD analysis under the advanced phase shift of inductive current；
Figure 13 is compensated current simulations waveform and THD analysis under the advanced phase shift of inductive current；
Figure 14 is uncompensated current simulations waveform and THD analysis under inductive current unity power factor；
Figure 15 is compensated current simulations waveform and THD analysis under inductive current unity power factor；
Figure 16 is that inductive current lags uncompensated current simulations waveform and THD analysis under phase shift；
Figure 17 is that inductive current lags compensated current simulations waveform and THD analysis under phase shift.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments, and correction strategy is as follows:
Example principles figure as shown in Figure 1 can be seen that using three-phase VIENNA rectifier as case study on implementation, first by operation mould
Block calculates compensation starting point, compensation time, then three-phase current phase-shifted control signal is generated by phase shift block, finally by clipping
Module determines limit of compensation.It is characterized by: (phase of inductive current is ahead of this at this time when a certain phase inductance current over-zero
The phase of commutating phase device input terminal voltage fundametal compoment), or (this when a certain commutating phase device input terminal voltage fundametal compoment zero passage
When inductive current phase lag behind the phase of the commutating phase device input terminal voltage fundametal compoment), to other biphase current phase shifts
Control the absolute value of signal | i'x| (x=A, B, C) injects the distortion compensation Injection Current signal i for crossing Zero-phase currentx0(x=A,
B, C) constitute electric current reconstructing control signal iRx(x=A, B, C), the positive and negative electricity by being applied phase of distortion compensation Injection Current signal
The through direction for flowing the direction of phase-shifted control signal and the electric current phase-shifted control signal of the zero passage phase codetermines, later electric current weight
Structure controls signal iRxThe amplitude generated again with outer voltage output steady-state value is UmCarrier wave compare, and then generate driving signal,
It is final to inhibit the Zero-crossing Distortion that three-phase current phase shift generates in energy one-way flow three-phase rectifier.
A kind of energy one-way flow three-phase rectifier electric current phase shift Zero-crossing Distortion based on one circle control corrects plan
Slightly steps are as follows:
(1) compensation point is determined: by the rectifier feature of energy one-way flow it is found that when current over-zero, rectifier at this time
Input terminal voltage also must be reversed with electric current, therefore rectifier is unless its input current works in some suitable angle of lag
Degree, otherwise its input terminal by no longer can direction needed for generative circuit voltage, lead to current distortion, therefore, compensation point and rectification
The fundametal compoment zero crossing of device input terminal voltage is related with the sequencing of inductive current zero crossing:
It, should be in inductive current zero crossing when the fundametal compoment phase of the advanced rectifier input voltage of inductive current phase
It starts compensating for；It, should be in rectifier input when the fundametal compoment phase of inductive current delayed phase rectifier input voltage
The fundametal compoment zero crossing of voltage starts compensating for.
(2) the compensation time: known u is determinedA、uB、uCFor the supply voltage of three-phase equilibrium, ω is power supply angular frequency,For
Supply voltage amplitude, then:
Lx(x=A, B, C) is input side three pole reactor, and three pole reactor value is answered equal in engineering, it may be assumed that
LA=LB=LC=L
(a) inductive current after hypothesis phase shiftIt is ahead of supply voltageAngle
Value is θ, at this point, inductive current can carry out resolution of vectors relative to supply voltage, vector in the same direction is known as having with supply voltage
Function componentThe vector vertical with supply voltage is known as reactive componentX represents A, B, C three-phase.Then inductive current can be with table
It is shown as:
If the angle that the fundametal compoment of each commutating phase device input terminal voltage lags behind each phase supply voltage isThen each phase
Angle of lagIt can be expressed asThen each mutually compensation time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
(b) inductive current after hypothesis phase shiftWith supply voltage same-phase, then inductive current distortion angle is each mutually whole
The fundametal compoment of stream device input terminal voltage lags behind the angle of each phase supply voltage, as angleThen each mutually compensation time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
(c) inductive current after hypothesis phase shiftThe angle value for lagging behind supply voltage is θ, at this point, inductive current can phase
Resolution of vectors is carried out for supply voltage, vector in the same direction is known as active component with supply voltageIt is vertical with supply voltage
Vector is known as reactive componentIf the fundametal compoment of each commutating phase device input terminal voltage lags behind the angle of each phase supply voltage
ForThe then lag angle of each phaseIt can be expressed asBased on the angle θ with
There are following three kinds of situations in the relationship at angle, compensation time:
<1>whenWhen, each phase is obtained by phasor diagram and compensates the time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
<2>whenWhen, can obtain each phase compensation time by phasor diagram is zero, i.e. the fundamental wave of rectifier input voltage point
Amount phase is identical as inductive current phase, and inductive current waveform does not distort at this time, therefore the compensation time is zero.
<3>whenWhen, each phase is obtained by phasor diagram and compensates the time are as follows:
In the case where threephase load balance, that is, work as IA=IB=IC=ImWhen；Above three formula can be rewritten as Unified Expression
Formula:
(3) limiting value of compensation is determined: assuming that the angle γ is inductive current waveform when being sinusoidal waveform (not distorting) inductance electricity
Stream lags behind the angle of supply voltage, based on the above, the limiting value of compensation has following expression:
(a) inductive current is ahead of the angle value of supply voltage for θ, at this point, electric current phase-shifted control signal after assuming phase shiftExpression formula known by phasor diagram, can indicate are as follows:
The differential seat angle that inductive current and electric current phase-shifted control signal can be obtained according to phasor diagram is+2 θ of γ.It is excessively high in order to prevent
Penalty coefficient k cause rectifier control system overshoot, the inductive current for causing rectifier to input generates distortion, therefore need to be to improvement
Modulation wave amplitude in one circle control makees following limitation:
Wherein Um=(UoRs)/(2Z) be systematic steady state when voltage regulator output valve, RsFor inductive current sampling electricity
Resistance, Z are circuit load equivalent impedance, UoFor rectifier DC side output voltage.
(b) assume to make inductive current and supply voltage same-phase by phase shift, at this point, being known by phasor diagram, electric current phase shift
Control signal can be expressed as:
Excessively high penalty coefficient k causes rectifier control system overshoot in order to prevent, the inductance electricity for causing rectifier to input
The raw distortion of miscarriage, therefore need to have following limitation to the modulation wave amplitude in modified one-cycle control:
Wherein Um=(UoRs)/(2Re) be systematic steady state when voltage regulator output valve, RsFor inductive current sampling electricity
Resistance, ReFor circuit load equivalent impedance, UoFor rectifier DC side output voltage.
(c) inductive current lags behind the angle of supply voltage as θ after assuming phase shift, at this point, electric current phase-shifted control signal
Expression formula is known by phasor diagram, can indicate are as follows:
The differential seat angle that inductive current and electric current phase-shifted control signal can be obtained according to phasor diagram is 2 θ-γ.It is excessively high in order to prevent
Penalty coefficient k cause rectifier control system overshoot, the inductive current for causing rectifier to input generates distortion, therefore need to be to improvement
Modulation wave amplitude in one circle control has following limitation:
Wherein Um=(UoRs)/(2Z) be systematic steady state when voltage regulator output valve, RsFor inductive current sampling electricity
Resistance, Z are circuit load equivalent impedance, UoFor rectifier DC side output voltage.
(4) known by (a) in step (2), three pole reactor electric current is i in energy one-way flow three-phase rectifierA、iB、iC, lead to
Cross AC sampling resistance RsTo three pole reactor electric current iA、iB、iCIt is sampled, obtains three pole reactor current sampling signal RsiA、
RsiB、RsiC；
(5) by the three pole reactor current sampling signal R in step (4)siA、RsiB、RsiCIt takes into computing module, generates choosing
Select signal, switching signal and clipping value signal；
(6) by the three pole reactor current sampling signal R in step (4)siA、RsiB、RsiCIt takes into phase shift block, generates three
Phase current phase-shifted control signal i'A、i'B、i'C。
(7) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs the input of multi-path choice module,
To three-phase current phase-shifted control signal i'A、i'B、i'CSelective implantation is carried out, multi-path choice signal, specific control mode are obtained
It is as follows:
If (a) (phase of inductive current is ahead of the commutating phase device input terminal voltage at this time when A phase inductance current over-zero
The phase of fundametal compoment), or (the delayed phase of inductive current at this time when A commutating phase device input terminal voltage fundametal compoment zero passage
In the phase of the commutating phase device input terminal voltage fundametal compoment), then multi-path choice module is by A phase current phase-shifted control signal i'A
It is injected into B phase current phase-shifted control signal i'BNeutralize C phase current phase-shifted control signal i'CIn；
If (b) (phase of inductive current is ahead of the commutating phase device input terminal voltage at this time when B phase inductance current over-zero
The phase of fundametal compoment), or (the delayed phase of inductive current at this time when B commutating phase device input terminal voltage fundametal compoment zero passage
In the phase of the commutating phase device input terminal voltage fundametal compoment), then multi-path choice module is by B phase current phase-shifted control signal i'B
Inject A phase current phase-shifted control signal i'AWith C phase current phase-shifted control signal i'C；
If (c) (phase of inductive current is ahead of the commutating phase device input terminal voltage at this time when C phase inductance current over-zero
The phase of fundametal compoment), or (the delayed phase of inductive current at this time when C commutating phase device input terminal voltage fundametal compoment zero passage
In the phase of the commutating phase device input terminal voltage fundametal compoment), then multi-path choice module is by C phase current phase-shifted control signal i'C
Inject A phase current phase-shifted control signal i'AWith B phase current phase-shifted control signal i'B；
Know that required selection signal is calculated by computing module by step (6)；
(8) using the multi-path choice signal in step (7) as the input of injection switch module, three-phase Injection Current letter is obtained
Number, specific control mode is as follows:
(a) when a certain phase inductance current over-zero, (phase of inductive current is ahead of the commutating phase device input terminal electricity at this time
Press the phase of fundametal compoment), or (the phase of inductive current at this time when a certain commutating phase device input terminal voltage fundametal compoment zero passage
Lag behind the phase of the commutating phase device input terminal voltage fundametal compoment), closure injection switch passes through three-phase Injection Current；
(b) when the switch is closed between be equal to compensation the time when, disconnect injection switch, forbid three-phase Injection Current to pass through；
Know that required switching signal is calculated by computing module by step (7)；
(9) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs sign function module sign
(ix) input, respectively obtain three-phase current phase-shifted control signal i'A、i'B、i'CIn the direction at current time, referred to as three-phase electricity
Phase-shifted control signal mark signal is flowed, specific control mode is as follows:
If (a) value of electric current phase-shifted control signal is greater than 0, the output of sign function module is 1；
If (b) value of electric current phase-shifted control signal is less than 0, the output of sign function module is -1；
If (c) value of electric current phase-shifted control signal is exactly equal to 0, the output of then symbol function module remains a period of time
The output at quarter；
(10) by the three-phase current mark signal in the three-phase Injection Current signal and step (9) in step (8), by multiplying
Musical instruments used in a Buddhist or Taoist mass is multiplied respectively, obtains the three-phase Injection Current signal of tape symbol, referred to as distortion compensation Injection Current signal iA0、iB0、iC0；
(11) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs the input of absolute value block,
Obtain the absolute value signal of three-phase current phase-shifted control signal | i'A|、|i'B|、|i'C|；
(12) by the three-phase current phase shift in the three-phase Injection Current signal of the tape symbol in step (10) and step (11)
Control the absolute value signal of signal | i'A|、|i'B|、|i'C| correspondence is subtracted each other, and three-phase current reconfigurable control signal i is obtainedRx(x=A,
B,C)；
(13) for the control signal not overshoot of Guarantee control system, guarantee system stability, will be obtained in step (12)
Three-phase current reconfigurable control signal be sent into limiter, make signal within the scope of controllable, known by step (5), required limit
Amplitude size is calculated by computing module；
(14) in electronic power convertor DC voltage outer ring, electronic power convertor DC voltage reference valueWith DC side feedback voltage UdPressure difference signal e is exported after subtracteru, euIt indicates are as follows:
Amplitude of output of the pressure difference signal after voltage regulator PI control as carrier signal, from one circle control
UmThere is following expression:
Wherein Z is equivalent load impedance:
Z=Re+j(XL-XC)
(15) the three-phase current reconfigurable control signal in step (13) after clipping, with the amplitude generated by carrier wave generation module
For UmCarrier signal, by comparator carry out signal complete a business transaction generate pwm signal be sent into bus, and then control electronic power conversion
The on-off of switching device in device.
By step (7) to step (12) it is found that the monocycle distortions correction control strategy that this patent is proposed, so that with original
The signal that carrier signal compares is by electric current phase-shifted control signal | i'x| (x=A, B, C) becomes electric current phase-shifted control signal | i'x|
(x=A, B, C) and distortion compensation Injection Current signal ix0Electric current reconstructing after (x=A, B, C) subtracts each other controls signal.Distortion compensation
Injection Current signal can indicate are as follows:
X=A, B, C in formula represent three-phase current, y=A, B, C and y ≠ x.
The current signal compared with carrier signal is redefined at this time, and referred to as electric current reconstructing controls signal iRx(x=A, B,
C), it may be assumed that
iRx=| i 'x|-ix0
It is characterized by: (phase of inductive current is ahead of the commutating phase device at this time when a certain phase inductance current over-zero
The phase of input terminal voltage fundametal compoment), or (the inductance electricity at this time when a certain commutating phase device input terminal voltage fundametal compoment zero passage
The phase of stream lags behind the phase of the commutating phase device input terminal voltage fundametal compoment), to other biphase current phase-shifted control signals
Absolute value | i'x| (x=A, B, C) injection it is positive and negative with distortion compensation Injection Current signal (distortion compensation Injection Current signal
The through direction of the electric current phase-shifted control signal of the positive and negative direction by being applied the electric current phase-shifted control signal of phase and the zero passage phase
Codetermining) identical sinusoidal quantity, cosine amount or constant constitute electric current reconstructing and control signal iRx(x=A, B, C) still is able to press down
The Zero-crossing Distortion that three-phase current phase shift generates in energy one-way flow three-phase rectifier processed.
In order to verify the validity for the control strategy that this patent is proposed, the control strategy is carried out with reference to industrial reality
Emulation.
For simulation waveform as shown in Figure 12, Figure 13, Figure 14, Figure 15, Figure 16, Figure 17, Figure 12 is under the advanced phase shift of inductive current
Uncompensated current simulations waveform and THD analysis；Figure 13 be the advanced phase shift of inductive current under compensated current simulations waveform and
THD analysis；Figure 14 is uncompensated current simulations waveform and THD analysis under inductive current unity power factor；Figure 15 is inductance
Compensated current simulations waveform and THD analysis under current unit power factor；Figure 16 is not mend under inductive current lag phase shift
Current simulations waveform and the THD analysis repaid；Figure 17 is that compensated current simulations waveform and THD divide under inductive current lag phase shift
Analysis；As can be seen that control strategy through the invention, effectively has modified the exchange side of the three-phase rectifier of energy one-way flow
A kind of current waveform distortion, it was demonstrated that energy one-way flow three-phase rectifier electric current phase shift based on one circle control of the invention
The validity of zero distortions correction strategy.
In conclusion devising one kind the present invention is based on the three-phase rectifier of energy one-way flow and being able to suppress electric current shifting
Effective control strategy of the Zero-crossing Distortion mutually generated；Embodiment described above be only to the preferred embodiment of the present invention into
Row description, is not defined the conception and scope of invention, under the premise of not departing from design scheme of the present invention, work in this field
The all variations and modifications that journey technical staff makes technical solution of the present invention should all fall into protection scope of the present invention, this
Claimed technology contents are invented, are all described in the claims.
Claims (2)
1. a kind of three-phase rectifier electric current phase shift Zero-crossing Distortion modification method, the three-phase rectifier includes that all energy are unidirectional
The three-phase rectifier of flowing；
It is characterized by: when a certain phase inductance current over-zero and phase is ahead of the commutating phase device input terminal voltage fundametal compoment
When phase, or when a certain commutating phase device input terminal voltage fundametal compoment zero passage and phase lags behind the commutating phase device input terminal voltage
When the phase of fundametal compoment, to the absolute value of other biphase current phase-shifted control signals | i'x| (x=A, B, C) injects the zero passage
The distortion compensation Injection Current signal i of phase currentx0(x=A, B, C) constitutes electric current reconstructing and controls signal iRx(x=A, B, C), it is abnormal
The electric current in the positive and negative direction by being applied the electric current phase-shifted control signal of phase and the zero passage phase that become compensation Injection Current signal moves
The through direction of phase control signal codetermines, and electric current reconstructing controls signal i laterRxIt is generated again with outer voltage output steady-state value
Amplitude be UmCarrier wave compare, and then generate driving signal, it is final to inhibit three-phase electricity in energy one-way flow three-phase rectifier
Flow the Zero-crossing Distortion that phase shift generates；
A kind of energy one-way flow three-phase rectifier electric current phase shift Zero-crossing Distortion modification method step based on one circle control
It is rapid as follows:
(1) determine compensation point: by the rectifier feature of energy one-way flow it is found that when current over-zero, rectifier is inputted at this time
Hold voltage also must be reversed with electric current, thus rectifier unless the work of its input current in some suitable lag angle,
Otherwise its input terminal by no longer can direction needed for generative circuit voltage, lead to current distortion, therefore, compensation point is defeated with rectifier
Enter to hold the fundametal compoment zero crossing of voltage related with the sequencing of inductive current zero crossing:
When the fundametal compoment phase of the advanced rectifier input voltage of inductive current phase, should start in inductive current zero crossing
Compensation；It, should be in rectifier input voltage when the fundametal compoment phase of inductive current delayed phase rectifier input voltage
Fundametal compoment zero crossing start compensating for；
(2) the compensation time: known u is determinedA、uB、uCFor the supply voltage of three-phase equilibrium, ω is power supply angular frequency,For power supply
Voltage magnitude, then:
Lx(x=A, B, C) is input side three pole reactor, and three pole reactor value is answered equal in engineering, it may be assumed that
LA=LB=LC=L
(a) inductive current after hypothesis phase shiftIt is ahead of supply voltageAngle value be θ,
At this point, inductive current can carry out resolution of vectors relative to supply voltage, vector in the same direction is known as active component with supply voltageThe vector vertical with supply voltage is known as reactive componentX represents A, B, C three-phase；Then inductive current can indicate are as follows:
If the angle that the fundametal compoment of each commutating phase device input terminal voltage lags behind each phase supply voltage isThe then lag of each phase
AngleIt can be expressed asThen each mutually compensation time are as follows:
Work as IA=IB=IC=ImWhen；Above three formula can be rewritten as uniform expression:
(b) inductive current after hypothesis phase shiftWith supply voltage same-phase, then inductive current distortion angle is that each commutating phase device is defeated
Enter to hold the fundametal compoment of voltage to lag behind the angle of each phase supply voltage, as angleThen each mutually compensation time are as follows:
Work as IA=IB=IC=ImWhen；Above three formula can be rewritten as uniform expression:
(c) inductive current after hypothesis phase shiftThe angle value for lagging behind supply voltage is θ, at this point, inductive current can be relative to electricity
Source voltage carries out resolution of vectors, and vector in the same direction is known as active component with supply voltageThe vector vertical with supply voltage claims
For reactive componentIf the angle that the fundametal compoment of each commutating phase device input terminal voltage lags behind each phase supply voltage isThen
The lag angle of each phaseIt can be expressed asBased on the angle θ withThe pass at angle
There are following three kinds of situations in system, compensation time:
<1>whenWhen, each phase is obtained by phasor diagram and compensates the time are as follows:
Work as IA=IB=IC=ImWhen；Above three formula can be rewritten as uniform expression:
<2>whenWhen, can obtain each phase compensation time by phasor diagram is zero, i.e. the fundametal compoment phase of rectifier input voltage
Identical as inductive current phase, inductive current waveform does not distort at this time, therefore the compensation time is zero；
<3>whenWhen, each phase is obtained by phasor diagram and compensates the time are as follows:
Work as IA=IB=IC=ImWhen；Above three formula can be rewritten as uniform expression:
(3) determine the limiting value of compensation: assuming that the angle γ is inductive current waveform when being sinusoidal waveform, inductive current lags behind power supply
The angle of voltage, based on the above, the limiting value of compensation has following expression:
(a) inductive current is ahead of the angle value of supply voltage for θ, at this point, electric current phase-shifted control signal after assuming phase shiftExpression formula known by phasor diagram, can indicate are as follows:
The differential seat angle that inductive current and electric current phase-shifted control signal can be obtained according to phasor diagram is+2 θ of γ；Excessively high benefit in order to prevent
It repays coefficient k and causes rectifier control system overshoot, the inductive current for causing rectifier to input generates distortion, therefore need to be to improvement single-revolution
Modulation wave amplitude in phase control makees following limitation:
Wherein Um=(UoRs)/(2Z) be carrier wave amplitude, RsFor inductive current sampling resistance, Z is circuit load equivalent impedance,
UoFor rectifier DC side output voltage；
(b) assume to make inductive current and supply voltage same-phase by phase shift, at this point, being known by phasor diagram, electric current phase shifting control
Signal can be expressed as:
Excessively high penalty coefficient k causes rectifier control system overshoot in order to prevent, and the inductive current for causing rectifier to input produces
Raw distortion, therefore need to have following limitation to the modulation wave amplitude in modified one-cycle control:
Wherein Um=(UoRs)/(2Re) be carrier wave amplitude, RsFor inductive current sampling resistance, ReFor circuit load equivalent impedance,
UoFor rectifier DC side output voltage；
(c) inductive current lags behind the angle of supply voltage for θ, at this point, the expression of electric current phase-shifted control signal after assuming phase shift
Formula is known by phasor diagram, can indicate are as follows:
The differential seat angle that inductive current and electric current phase-shifted control signal can be obtained according to phasor diagram is 2 θ-γ；Excessively high benefit in order to prevent
It repays coefficient k and causes rectifier control system overshoot, the inductive current for causing rectifier to input generates distortion, therefore need to be to improvement single-revolution
Modulation wave amplitude in phase control has following limitation:
Wherein Um=(UoRs)/(2Z) be carrier wave amplitude, RsFor inductive current sampling resistance, Z is circuit load equivalent impedance, Uo
For rectifier DC side output voltage；
(4) known by (a) in step (2), three pole reactor electric current is i in energy one-way flow three-phase rectifierA、iB、iC, pass through friendship
Flow sampling resistor RsTo three pole reactor electric current iA、iB、iCIt is sampled, obtains three pole reactor current sampling signal RsiA、RsiB、
RsiC；
(5) by the three pole reactor current sampling signal R in step (4)siA、RsiB、RsiCIt takes into computing module, generates selection letter
Number, switching signal and clipping value signal；
(6) by the three pole reactor current sampling signal R in step (4)siA、RsiB、RsiCIt takes into phase shift block, generates three-phase electricity
Flow phase-shifted control signal i'A、i'B、i'C；
(7) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs the input of multi-path choice module, to three
Phase current phase-shifted control signal i'A、i'B、i'CSelective implantation is carried out, obtains multi-path choice signal, specific control mode is as follows:
(a) if A phase inductance current over-zero and phase are ahead of the phase of the commutating phase device input terminal voltage fundametal compoment, or
When A commutating phase device input terminal voltage fundametal compoment zero passage and phase lags behind the phase of the commutating phase device input terminal voltage fundametal compoment
When position, then multi-path choice module is by A phase current phase-shifted control signal i'AIt is injected into B phase current phase-shifted control signal i'BNeutralize C phase
Electric current phase-shifted control signal i'CIn；
(b) if B phase inductance current over-zero and phase are ahead of the phase of the commutating phase device input terminal voltage fundametal compoment, or
When B commutating phase device input terminal voltage fundametal compoment zero passage and phase lags behind the phase of the commutating phase device input terminal voltage fundametal compoment
When position, then multi-path choice module is by B phase current phase-shifted control signal i'BInject A phase current phase-shifted control signal i'AWith C phase current
Phase-shifted control signal i'C；
(c) if C phase inductance current over-zero and phase are ahead of the phase of the commutating phase device input terminal voltage fundametal compoment, or
When C commutating phase device input terminal voltage fundametal compoment zero passage and phase lags behind the phase of the commutating phase device input terminal voltage fundametal compoment
When position, then multi-path choice module is by C phase current phase-shifted control signal i'CInject A phase current phase-shifted control signal i'AWith B phase current
Phase-shifted control signal i'B；
Know that required selection signal is calculated by computing module by step (6)；
(8) using the multi-path choice signal in step (7) as the input of injection switch module, three-phase Injection Current signal is obtained,
Specific control mode is as follows:
(a) when a certain phase inductance current over-zero and when phase is ahead of the phase of the commutating phase device input terminal voltage fundametal compoment,
Or when a certain commutating phase device input terminal voltage fundametal compoment zero passage and phase lags behind the commutating phase device input terminal voltage fundamental wave point
When the phase of amount, closure injection switch passes through three-phase Injection Current；
(b) when the switch is closed between be equal to compensation the time when, disconnect injection switch, forbid three-phase Injection Current to pass through；
Know that required switching signal is calculated by computing module by step (7)；
(9) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs sign function module sign (ix) it is defeated
Enter, respectively obtains three-phase current phase-shifted control signal i'A、i'B、i'CIn the direction at current time, referred to as three-phase current phase shift control
Signal code signal processed, specific control mode are as follows:
If (a) value of electric current phase-shifted control signal is greater than 0, the output of sign function module is 1；
If (b) value of electric current phase-shifted control signal is less than 0, the output of sign function module is -1；
If (c) value of electric current phase-shifted control signal is exactly equal to 0, the output of then symbol function module remains last moment
Output；
(10) by the three-phase current mark signal in the three-phase Injection Current signal and step (9) in step (8), by multiplier
It is multiplied respectively, obtains the three-phase Injection Current signal of tape symbol, referred to as distortion compensation Injection Current signal iA0、iB0、iC0；
(11) by the three-phase current phase-shifted control signal i' in step (6)A、i'B、i'CAs the input of absolute value block, obtain
The absolute value signal of three-phase current phase-shifted control signal | i'A|、|i'B|、|i'C|；
(12) by the three-phase current phase shifting control in the three-phase Injection Current signal of the tape symbol in step (10) and step (11)
The absolute value signal of signal | i'A|、|i'B|、|i'C| correspondence is subtracted each other, and three-phase current reconfigurable control signal i is obtainedRx(x=A, B,
C)；
(13) for the control signal not overshoot of Guarantee control system, guarantee system stability, it will be three obtained in step (12)
Phase current reconstruction controls signal and is sent into limiter, makes signal within the scope of controllable, is known by step (5), required amplitude limit value
Size is calculated by computing module；
(14) in electronic power convertor DC voltage outer ring, electronic power convertor DC voltage reference valueWith it is straight
Flow side feedback voltage UdPressure difference signal e is exported after subtracteru, euIt indicates are as follows:
Amplitude of output of the pressure difference signal after voltage regulator PI control as carrier signal, the U known to one circle controlmHave
It is following to indicate:
Wherein Z is equivalent load impedance:
Z=Re+j(XL-XC)
(15) the three-phase current reconfigurable control signal in step (13) after clipping is U with the amplitude generated by carrier wave generation modulem
Carrier signal, by comparator carry out signal complete a business transaction generate pwm signal be sent into bus, and then control electronic power convertor in
The on-off of switching device；
Distortion compensation Injection Current signal can indicate are as follows:
X=A, B, C in formula represent three-phase current, y=A, B, C and y ≠ x；
The current signal compared with carrier signal is redefined at this time, and referred to as electric current reconstructing controls signal iRx(x=A, B, C),
That is:
iRx=| i 'x|-ix0。
2. a kind of modification method as described in claim 1, it is characterised in that: when a certain phase inductance current over-zero and phase is advanced
In the phase of the commutating phase device input terminal voltage fundametal compoment, or when a certain commutating phase device input terminal voltage fundametal compoment zero passage and
When phase lags behind the phase of the commutating phase device input terminal voltage fundametal compoment, to the exhausted of other biphase current phase-shifted control signals
To value | i'x| (x=A, B, C) injects positive and negative sinusoidal quantity identical with distortion compensation Injection Current signal, cosine amount or constant structure
Signal i is controlled at electric current reconstructingRx(x=A, B, C) still is able to inhibit three-phase current in energy one-way flow three-phase rectifier to move
The Zero-crossing Distortion mutually generated.
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| CN109301839A (en) * | 2018-10-23 | 2019-02-01 | 中国矿业大学(北京) | A kind of reactive power compensation technology of parallel energy one-way flow controlled rectifier |
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| CN110391726B (en) * | 2019-07-26 | 2020-05-26 | 中国矿业大学(北京) | Method for inhibiting zero-crossing distortion of input current of unidirectional three-phase star-connected controllable rectifier |
| CN110380633A (en) * | 2019-07-31 | 2019-10-25 | 太原理工大学 | A kind of electric current modification method being directed under non-ideal power grid based on one circle control |
| CN110581663B (en) * | 2019-10-16 | 2022-04-01 | 南京理工大学 | Phase compensation device and method of Vienna rectifier under low carrier ratio |
| CN110798074B (en) * | 2019-11-11 | 2021-06-18 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Cascade type single-phase alternating current-to-direct current isolation converter |
| CN110855164B (en) * | 2019-11-29 | 2021-04-06 | 深圳市科华恒盛科技有限公司 | Control method, system and terminal equipment |
| CN112398357B (en) * | 2020-12-10 | 2022-04-12 | 江苏鑫通汽车部件有限公司 | Control method for eliminating VIENNA rectifier current zero crossing distortion |
| CN112436743B (en) * | 2020-12-10 | 2022-04-08 | 江苏鑫通汽车部件有限公司 | Method for eliminating VIENNA rectifier current zero crossing distortion |
| CN112865561B (en) * | 2021-01-28 | 2022-05-06 | 三峡大学 | Diode clamping type back-to-back bridgeless three-level rectifier |
| CN113224986B (en) * | 2021-05-17 | 2022-10-21 | 深圳市航顺芯片技术研发有限公司 | DC brushless motor and control method of DC brushless motor |
| CN117561672A (en) * | 2021-09-30 | 2024-02-13 | 华为数字能源技术有限公司 | Vienna rectifier, control method of Vienna rectifier and charging pile |
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| CN102959841B (en) * | 2010-06-29 | 2016-01-13 | 伊顿工业公司 | The power factor controlling of loop converter |
| CN101951166B (en) * | 2010-07-14 | 2012-05-30 | 北京航空航天大学 | Feedforward control method for intermediate-frequency lower twin-stage matrix converter |
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