CN109327032A - A kind of active three-phase imbalance automatic control system - Google Patents
A kind of active three-phase imbalance automatic control system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The present invention provides a kind of active three-phase imbalance automatic control system, belong to power grid three-phase imbalance technical field, including sampling module, drive circuit module, IGBT switch module, control platform, load and power supply, the control platform includes simulation plate module and core board module, the core board module includes DSP processing unit and fpga logic processing unit, the DSP processing unit is used to carry out operation to the voltage and current signals of the simulation plate module output, obtain drive pulse signal, the fpga logic processing unit is for generating pwm pulse bandwidth modulation signals, the pulse drive signal and the pwm pulse bandwidth modulation signals are exported to drive circuit module, compensation current feedback is converted electric energy to load for controlling IGBT switch module, and adjustment institute State the bandwidth of pulse drive signal.A kind of active three-phase imbalance automatic control system of the invention adds the control platform of FPGA architecture using DSP, can automatically adjust three-phase imbalance.
Description
Technical field
The invention belongs to power grid three-phase imbalance technical fields more particularly to a kind of active three-phase imbalance to automatically control system
System.
Background technique
Three-phase imbalance problem is suggested already as one of power quality problem, but specific three-phase imbalance is to electricity
The harm of Force system bring has much, and great loss can be brought to system, and the research of this respect is also lacking, and with
The development and application of the new and high technologies such as power electronics and communication, the reason of making electric power networks three-phase imbalance, are more sent out to complicating
Exhibition.The control measure of three-phase imbalance problem are currently existed, mainly by adjusting idle mode and adding
Often there is the problems such as Harmonics amplification when compensating by adjusting idle mode in the mode of arc suppression coil；Add arc suppression coil
It can only play the role of cutting down capacitance current, to solving the problems, such as that three-phase imbalance do not have tangible meaning, sometimes even so that three-phase
Degree of unbalancedness increases, and therefore, both modes of three-phase imbalance problem is solved the problems, such as at present ineffective.
Summary of the invention
The purpose of the present invention is to provide a kind of active three-phase imbalance automatic control systems, using DSP plus FPGA architecture
Control platform, three-phase imbalance, compensating reactive power and harmonic wave can be automatically adjusted, can separate compensation three-phase imbalance, it is idle or
Harmonic wave, can also comprehensive compensation, whole system is safe and reliable.
In order to solve the above technical problems, the present invention provides a kind of active three-phase imbalance automatic control systems, comprising: adopt
Egf block, drive circuit module, IGBT switch module, control platform, load and power supply, the control platform include analog board
Module and the core board module connecting with the simulation plate module, the simulation plate module includes sampled signal input interface list
Member, amplifier signal conditioning unit and signal output interface unit, the sampled signal input interface unit and the sampling mould
Block connection, the voltage and current signals of load-side and/or source side for acquiring sampling module are input to the analog board
Module, the amplifier signal conditioning unit is for being filtered the voltage and current signals of acquisition, the signal
Output interface unit is for by treated, the voltage and current signals to be exported to the core board module；
The core board module includes that input interface unit, DSP processing unit, fpga logic processing unit and control signal are defeated
Outgoing interface unit, the input interface unit are used to receive the voltage and current signals of the simulation plate module output, the DSP
Processing unit includes core control algolithm subelement, for it is described simulation plate module output the voltage and current signals into
Row operation, obtains drive pulse signal, and the fpga logic processing unit includes logical operation process subelement and PWM single
Member, the logical operation process subelement are used for logical operation process, and the PWM subelement is for generating pwm pulse width tune
Signal processed, the control signal output interface unit are used to export pulse drive signal and the PWM to drive circuit module
Pulse width modulating signal converts electric energy to compensation current feedback to load, and adjustment for controlling IGBT switch module
The bandwidth of the pulse drive signal.
According to an embodiment of the present invention, the received voltage signal of the sampled signal input interface unit and electric current letter
It number is respectively three-phase voltage, DC voltage, three-phase current and the DC current of load-side and/or source side, the sampled signal
Input interface unit is also used to the temperature signal that sampling module acquires being input to the simulation plate module, the temperature signal packet
Include IGBT substrate temperature, reactor temperature and environment temperature.
Another embodiment according to the present invention, the sampled signal input interface unit includes alternating voltage interface, straight
Flow voltage interface, Hall sensor interface, temperature sensor interface, current transformer interface and IGBT interface, the sampling
Module includes Hall sensor, current transformer and temperature sensor, and external three-phase voltage source and DC voltage source are respectively through institute
It states alternating voltage interface and connects the simulation plate module with DC voltage interface, the Hall sensor interface connects the Hall
For sensor to acquire load-side and/or source side three-phase voltage and DC voltage, the temperature sensor interface connects the temperature
For degree sensor to acquire reactor temperature and environment temperature, the current transformer interface connects the current transformer to acquire
Load-side and/or source side three-phase current and DC current, the IGBT interface include NTC maximum value interface and NTC minimum value
Interface is connect with the IGBT switch module, to acquire IGBT substrate temperature.
Another embodiment according to the present invention, the DSP processing unit further include connecting with core control algolithm subelement
The analog-to-digital conversion subelement connect, for the voltage and current signals of the simulation plate module output to be converted into digital letter
Number.
Another embodiment according to the present invention, the core board module further include IO control interface, the core control
Algorithm subelement is also used to generate IO control signal according to the voltage and current signals of the simulation plate module output, and leads to
The IO control interface is crossed to export to external relay.
Another embodiment according to the present invention, the DSP processing unit further include synchronized sampling subelement, for institute
The electric current and voltage for stating load-side and/or source side are sent to the core control algolithm subelement after being sampled.
Another embodiment according to the present invention, the core control algolithm subelement are described negative using fft algorithm processing
Side electric current is carried, harmonic wave command current value and current time sequence is calculated in source side electric current and load-side three-phase voltage.
Another embodiment according to the present invention, the core control algolithm subelement further include capacitor voltage equalizing subelement,
The harmonic wave command current value and current time sequence obtain command current value after capacitor voltage equalizing subelement processing, described
The difference of command current value and current load current value is sent to the PWM subelement.
Another embodiment according to the present invention, the PWM subelement use the modulation of tri-level single polarity S PWM algorithm
Mode.
Another embodiment according to the present invention further includes interactive interface module and RS232 interface, the interactive interface mould
Block carries out data communication by the RS232 interface and the core board module.
Beneficial effects of the present invention:
A kind of active three-phase imbalance automatic control system of the invention, including sampling module, drive circuit module, IGBT switch
Module, control platform, load and power supply, structure are simple.The control platform include simulation plate module and with the analog board
The core board module of module connection, the core board module include input interface unit, DSP processing unit, fpga logic processing
Unit and control signal output interface unit, the input interface unit are used to receive the voltage of the simulation plate module output
And current signal, the DSP processing unit include core control algolithm subelement, for the institute to the simulation plate module output
It states voltage and current signals and carries out operation, obtain drive pulse signal, the fpga logic processing unit includes PWM subelement,
For generating pwm pulse bandwidth modulation signals, the control signal output interface unit is used to export arteries and veins to drive circuit module
Driving signal and the pwm pulse bandwidth modulation signals are rushed, convert electric energy to compensation electricity for controlling IGBT switch module
Stream feedback is to load, and adjusts the bandwidth of the pulse drive signal.The active three-phase imbalance of the embodiment of the present invention is automatic
Control system sampling module acquires the electric current and information of voltage in load circuit, and control platform receives electric current and information of voltage, and
Analysis processing generates drive pulse signal, and the work of IGBT switch module, IGBT switch are driven after amplifying by drive circuit module
Energy provided by power supply is converted into harmonic compensation current and is fed back in load by circuit module, reaches the function of reducing harmonic wave,
Effectively adjust three-phase imbalance problem.A kind of active three-phase imbalance automatic control system of the invention adds FPGA frame using DSP
The control platform of structure can automatically adjust three-phase imbalance, compensating reactive power and harmonic wave, can separate compensation three-phase imbalance, it is idle or
Harmonic wave, can also comprehensive compensation, whole system is safe and reliable.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of one embodiment of active three-phase imbalance automatic control system of the invention；
Fig. 2 is a kind of structural schematic diagram of another embodiment of active three-phase imbalance automatic control system of the invention；
Fig. 3 is that a kind of structure of one embodiment of the control platform of active three-phase imbalance automatic control system of the invention is shown
It is intended to；
Fig. 4 is a kind of one embodiment processing of the DSP processing unit of active three-phase imbalance automatic control system of the invention
The schematic diagram of process；
Fig. 5 is a kind of PWM method one of the FPGA processing unit of active three-phase imbalance automatic control system of the invention
The schematic diagram of a embodiment process.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
As shown in Figs 1-4, the embodiment of the invention provides a kind of active three-phase imbalance automatic control systems 100, comprising:
Sampling module 10, control platform 20, drive circuit module 30, IGBT switch module 40 and load 50, the sampling module 10
It is electrically connected with the control platform 20, for acquiring the voltage and current signals of load-side or electric current survey and being sent to the control
Platform 20, the control platform 20 are electrically connected with the drive circuit module 30, and the control platform 20 is described based on the received
Electric current and voltage signal generate drive pulse signal, and the drive circuit module 30 is electrically connected with the IGBT switch module 40,
The drive circuit module 30 is sent to the IGBT switch module 40 after amplifying the drive pulse signal, and the IGBT is opened
Module 40 is closed for converting electric energy to compensation current feedback to load 50.
The embodiment of the invention provides a kind of control platform 20 of active three-phase imbalance automatic control system, the controls
Platform 20 includes the core board module 22 simulating plate module 21 and connecting with the simulation plate module, and the simulation plate module 21 is wrapped
Include sampled signal input interface unit 211, amplifier signal conditioning unit 212 and signal output interface unit 213, the sampling
Signal input interface unit 211 is connect with the sampling module 10, load-side and/or source side for acquiring sampling module
Voltage and current signals be input to the simulation plate module 21, the amplifier signal conditioning unit 212 is used for the institute to acquisition
Voltage and current signals are stated to be filtered, the signal output interface unit 213 be used for will treated the voltage and
Current signal is exported to the core board module 22；
The core board module 22 include input interface unit 221, DSP processing unit 222, fpga logic processing unit 223 with
And control signal output interface unit 224, the input interface unit is with 221 in the electricity for receiving simulation plate module 21 output
Pressure and current signal, the DSP processing unit 222 includes core control algolithm subelement, for the simulation plate module 21
The voltage and current signals of output carry out operation, obtain drive pulse signal, the fpga logic processing unit 223 includes
Logical operation process subelement and PWM subelement, the logical operation process subelement are used for logical operation process, the PWM
Subelement is used for for generating pwm pulse bandwidth modulation signals, the control signal output interface unit 224 to driving circuit mould
Block 30 exports pulse drive signal and the pwm pulse bandwidth modulation signals, for controlling IGBT switch module 40 for electric energy
Compensation current feedback is converted into load 50, and the bandwidth of the adjustment pulse drive signal.
A kind of active three-phase imbalance automatic control system of the embodiment of the present invention, including sampling module, driving circuit mould
Block, IGBT switch module, control platform, load and power supply, structure are simple.The control platform include simulation plate module and with
It is described simulation plate module connection core board module, the core board module include input interface unit, DSP processing unit,
Fpga logic processing unit and control signal output interface unit, the input interface unit is for receiving the simulation template die
The voltage and current signals of block output, the DSP processing unit includes core control algolithm subelement, for the analog board
The voltage and current signals of module output carry out operation, obtain drive pulse signal, the fpga logic processing unit packet
PWM subelement is included, for generating pwm pulse bandwidth modulation signals, the control signal output interface unit is used for driving electricity
Road module exports pulse drive signal and the pwm pulse bandwidth modulation signals, for controlling IGBT switch module for electric energy
Compensation current feedback is converted into load, and the bandwidth of the adjustment pulse drive signal.Active the three of the embodiment of the present invention
The mutually electric current and information of voltage in uneven automatic control system sampling module acquisition load circuit, control platform receive electric current and
Information of voltage, and analyze processing and generate drive pulse signal, IGBT switch module work is driven after amplifying by drive circuit module
Make, energy provided by power supply is converted into harmonic compensation current and is fed back in load by IGBT on-off circuit module, reaches reduction
The function of harmonic wave effectively adjusts three-phase imbalance problem.A kind of active three-phase imbalance of the embodiment of the present invention automatically controls system
System adds the control platform of FPGA architecture using DSP, can automatically adjust three-phase imbalance, compensating reactive power and harmonic wave, can separate compensation
Three-phase imbalance, idle or harmonic wave, can also comprehensive compensation, whole system is safe and reliable.
As one for example, the received voltage of the sampled signal input interface unit 211 of the embodiment of the present invention
Signal and current signal are respectively three-phase voltage, DC voltage, three-phase current and the DC current of load-side and/or source side,
The sampled signal input interface unit 211 is also used to for the temperature signal that sampling module 10 acquires to be input to the simulation template die
Block 21, the temperature signal include IGBT substrate temperature, reactor temperature and environment temperature.
As another for example, the sampled signal input interface unit 211 of the embodiment of the present invention includes exchange
Voltage interface, DC voltage interface, Hall sensor interface, temperature sensor interface, current transformer interface and IGBT connect
Mouthful, the sampling module includes Hall sensor, current transformer and temperature sensor, external three-phase voltage source and DC voltage
Source connects the simulation plate module with DC voltage interface through the alternating voltage interface respectively, and the Hall sensor interface connects
The Hall sensor is connect to acquire load-side and/or source side three-phase voltage and DC voltage, the temperature sensor interface
The temperature sensor is connected to acquire reactor temperature and environment temperature, it is mutual that the current transformer interface connects the electric current
Sensor to acquire load-side and/or source side three-phase current and DC current, the IGBT interface include NTC maximum value interface and
NTC minimum value interface is connect with the IGBT switch module, to acquire IGBT substrate temperature.
As another for example, the DSP processing unit 222 of the embodiment of the present invention further includes controlling to calculate with core
The analog-to-digital conversion subelement of subunit connection, the voltage and current signals for exporting the simulation plate module 21 turn
Change digital signal into.
As another for example, the core board module 22 of the embodiment of the present invention further includes IO control interface, institute
Core control algolithm subelement is stated to be also used to generate IO according to the voltage and current signals that the simulation plate module 21 exports
Signal is controlled, and is exported by the IO control interface to external relay.
The core board module of the embodiment of the present invention uses DSP+FPGA framework, and DSP is mainly responsible for acquisition signal and core
The algorithm of the heart, FPGA are mainly responsible for error protection and generate pwm signal.By analog-to-digital conversion subelement AD by externally input electricity
The analog signals such as pressure, electric current, temperature are converted into digital signal, read for DSP.Its groundwork includes: that DSP passes through AD acquisition electricity
Stream, voltage and temperature signal；Drive pulse signal is generated after running core control algolithm later；Drive pulse signal is sent to
Drive circuit module, IO control signal to IO control interface.
As another for example, the DSP processing unit 222 of the embodiment of the present invention further includes that synchronized sampling is single
Member, for the load-side and/or source side electric current and voltage sample after be sent to core control algolithm
Unit.
As another for example, the core control algolithm subelement of the embodiment of the present invention is using at fft algorithm
The load-side electric current is managed, harmonic wave command current value and current time sequence is calculated in source side electric current and load-side three-phase voltage
Column.
As another for example, the core control algolithm subelement of the embodiment of the present invention further includes capacitor voltage equalizing
Subelement, the harmonic wave command current value and current time sequence obtain instruction current after capacitor voltage equalizing subelement processing
The difference of value, described instruction current value and current load current value is sent to the PWM subelement.
It is referring to fig. 4 the process flow of core control algolithm subelement: load-side electric current il, source side electric current is and system
Voltage u is sampled through signal synchronized sampling module, obtains load-side electric current, the time sequence of source side electric current and system voltage
Column are respectively adopted rotating vector and FFT transform and carry out spectrum analysis, obtain their own zero-sequence component, negative sequence component, idle
The size of component and each harmonic component.Three phase unbalance current is compensated according to compensation making parameter, as needed may be used
Idle and harmonic wave is extracted.Load-side harmonic current and source side harmonic current are respectively multiplied by complex controll parameter Kl, Ks
It is added afterwards and obtains harmonic wave instruction current, and the even acceleration of output electric current increases after starting.
The difference of DC voltage current value and setting value obtains parameter △ ip, △ ip and voltage fundamental phase after PI is adjusted
Multiply, obtains the watt current for needing to absorb for stable DC side voltage, the electric current and the harmonic wave instruction current phase by starting
Add, using FFT inverse transformation, then obtains the output current time sequence of three-phase imbalance.
There may be the unbalanced situations of capacitance voltage in systems, so need to handle using DC voltage pressure,
That is: by the difference of upper half capacitance voltage Upn and lower half capacitance voltage Umn actual value, after PI is adjusted, a zero sequence point is obtained
Amount, the zero-sequence component are also used as a part of three-phase imbalance output electric current, so that capacitance voltage is equal up and down for DC side.
The output current time sequence of three-phase imbalance obtains the output current value at current time by synchronization signal, with electricity
Zero-sequence component that Rong Jun is pressed obtains final command current value after being added, and the command current value and three-phase imbalance are current
The difference of output current value overlapping system electric voltage feed forward and system output reactance feedforward final output after PI and repetitive controller
Give PWM subelement.
As another for example, the PWM subelement of the embodiment of the present invention is calculated using tri-level single polarity S PWM
The modulation system of method.Referring to Fig. 5, the modulator approach of SPWM algorithm specifically: DSP processing unit calculates three-phase instantaneous signal value,
FPGA reference wave, two benchmark triangular waves that FPGA oneself is generated, relationship tri_wave2=tri_ are sent to by bus
Wave1, FPGA the output pwm signal T1 compared with triangular wave (tri_wave2) by reference wave, T1 are by generating T1 behind insertion dead zone
With the pwm signal of T3, FPGA the output pwm signal T2 compared with triangular wave (tri_wave1) by reference wave, T2 are dead by insertion
The pwm signal of T2 and T4 is generated behind area.
In addition, the FPGA can also be achieved some important failure protection functions, and such as: when OOS failure, the drive of FPGA
Dynamic device has soft turn-off function, and the soft switching time is about 5us, it is contemplated that the soft switching time of different drivers it is variant and
OOS fail soft filters 1us, and design T2 and T3 evening T1 and T4 turn off 6us.
As another for example, the embodiment of the present invention further includes interactive interface module 60 and RS232 interface 61, institute
It states interactive interface module 60 and data communication is carried out with the core board module 22 by the RS232 interface 61.The present invention is implemented
A kind of active three-phase imbalance automatic control system of example further includes interactive interface module 60, is used for and the core board module 22
Data are carried out, and show the phase sequence of three-phase voltage current and the harmonic current of three-phase compensation front and back.The one of the embodiment of the present invention
The active three-phase imbalance automatic control system of kind can 3 ~ 31 subharmonic of real-time display three-phase compensation front and back by interactive interface module
Electric current, can real-time display three-phase voltage current phase sequence, it is more intuitively, convenient.
Optionally, core board module described in the embodiment of the present invention further includes PC monitoring software, logical with interactive interface module
MODBUS communication protocol is crossed to be communicated, wherein core board module is as slave, interactive interface module as three-phase imbalance from
Dynamic regulating device, the man-machine interface program of interactive interface module mainly includes MODBUS three-phase imbalance self-checking device journey
Sequence, display and control program, CAN communication program and TCP/IP communication program, the CAN communication program are made in equipment and machine
Can, it is mainly responsible for data exchange when simultaneously machine between different units, the man-machine interface program passes through with PC monitoring software
The connection of RS485/ industry ethernet, realizes the networking monitoring function of equipment.
Optionally, control platform 20 uses 24V power supply power supply, can be obtained by power supply chip, output ± 15V is supplied to suddenly
You use current sensor, export+15V power supply and use to drive circuit module, and+15V is core board by power supply chip simultaneously
Module 22 provides power supply.
Optionally, there are also FLASH chips in the control platform of the embodiment of the present invention, are used for load module, and RAM chip is used for
Storing data.
Optionally, a kind of load of active three-phase imbalance automatic control system of the embodiment of the present invention is electricity
Source can be AC single phase power supply or three-phase ac power supply.
Optionally, electric current and voltage signal that the sampling module of the embodiment of the present invention is sent, using advanced carrier wave
Stacking modulation, including zero-sequence component, increase modulation ratio, reduce switching loss.
Optionally, the drive circuit module 30 of the embodiment of the present invention is also used to generate OOS protection signal.The present invention is real
The drive circuit module 30 for applying example uses driving chip high speed photo coupling and totem-pote circuit, being exported by core board module 22
Signal amplify to drive IGBT switch module, and generate OOS protection signal.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention sets.
Claims (10)
1. a kind of active three-phase imbalance automatic control system characterized by comprising sampling module, drive
Dynamic circuit module, IGBT switch module, control platform, load and power supply, the control platform include simulation plate module
The core board module connecting with the simulation plate module, the simulation plate module include sampled signal input interface unit, fortune
Discharge signal conditioning unit and signal output interface unit, the sampled signal input interface unit and the sampling module connect
It connecing, the voltage and current signals of load-side and/or source side for acquiring sampling module are input to the simulation plate module,
For being filtered to the voltage and current signals of acquisition, the signal output connects the amplifier signal conditioning unit
Mouth unit is for by treated, the voltage and current signals to be exported to the core board module；
The core board module includes that input interface unit, DSP processing unit, fpga logic processing unit and control signal are defeated
Outgoing interface unit, the input interface unit are used to receive the voltage and current signals of the simulation plate module output, the DSP
Processing unit includes core control algolithm subelement, for it is described simulation plate module output the voltage and current signals into
Row operation, obtains drive pulse signal, and the fpga logic processing unit includes logical operation process subelement and PWM single
Member, the logical operation process subelement are used for logical operation process, and the PWM subelement is for generating pwm pulse width tune
Signal processed, the control signal output interface unit are used to export pulse drive signal and the PWM to drive circuit module
Pulse width modulating signal converts electric energy to compensation current feedback to load, and adjustment for controlling IGBT switch module
The bandwidth of the pulse drive signal.
2. a kind of active three-phase imbalance automatic control system according to claim 1, feature exist
In the received voltage signal of the sampled signal input interface unit and current signal are respectively load-side and/or power supply
Three-phase voltage, DC voltage, three-phase current and the DC current of side, the sampled signal input interface unit are also used to sample
The temperature signal of module acquisition is input to the simulation plate module, and the temperature signal includes IGBT substrate temperature, reactor temperature
Degree and environment temperature.
3. a kind of active three-phase imbalance automatic control system according to claim 2, feature exist
In, the sampled signal input interface unit include alternating voltage interface, DC voltage interface, Hall sensor interface,
Temperature sensor interface, current transformer interface and IGBT interface, the sampling module include Hall sensor, Current Mutual Inductance
Device and temperature sensor, external three-phase voltage source and DC voltage source are respectively through the alternating voltage interface and DC voltage interface
The simulation plate module is connected, the Hall sensor interface connects the Hall sensor to acquire load-side and/or power supply
Side three-phase voltage and DC voltage, the temperature sensor interface connect the temperature sensor to acquire reactor temperature and ring
Border temperature, the current transformer interface connect the current transformer with acquire load-side and/or source side three-phase current and
DC current, the IGBT interface include NTC maximum value interface and NTC minimum value interface, are connect with the IGBT switch module,
To acquire IGBT substrate temperature.
4. a kind of active three-phase imbalance automatic control system according to claim 1, feature exist
In the DSP processing unit further includes the analog-to-digital conversion subelement connecting with core control algolithm subelement, is used for institute
The voltage and current signals for stating simulation plate module output are converted into digital signal.
5. a kind of active three-phase imbalance automatic control system according to claim 4, feature exist
In the core board module further includes IO control interface, and the core control algolithm subelement is also used to according to the mould
The voltage and current signals of quasi- plate module output generate IO and control signal, and are exported by the IO control interface to outside
Relay.
6. a kind of active three-phase imbalance automatic control system according to claim 1, which is characterized in that at the DSP
Managing unit further includes synchronized sampling subelement, for the electric current to the load-side and/or source side and after voltage samples
It is sent to the core control algolithm subelement.
7. a kind of active three-phase imbalance automatic control system according to claim 6, which is characterized in that the core control
Algorithm subelement processed handles the load-side electric current using fft algorithm, and source side electric current and load-side three-phase voltage are calculated
Harmonic wave command current value and current time sequence.
8. a kind of active three-phase imbalance automatic control system according to claim 7, feature exist
In the core control algolithm subelement further includes capacitor voltage equalizing subelement, when the harmonic wave command current value and electric current
Between sequence obtain command current value after capacitor voltage equalizing subelement processing, described instruction current value and current load current
The difference of value is sent to the PWM subelement.
9. a kind of active three-phase imbalance automatic control system according to claim 1, feature
It is, the PWM subelement uses the modulation system of tri-level single polarity S PWM algorithm.
10. -9 any a kind of active three-phase imbalance automatic control system according to claim 1, which is characterized in that also
Including interactive interface module and RS232 interface, the interactive interface module passes through the RS232 interface and the core board module
Carry out data communication.
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| CN207368668U (en) * | 2017-08-29 | 2018-05-15 | 北京普锐电子有限公司 | A kind of modular active three-phase power balance regulating system |
| CN208955669U (en) * | 2018-11-13 | 2019-06-07 | 上海光维电力科技有限公司 | A kind of active three-phase imbalance automatic control system |
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