CN107370411A - A kind of three close-loop control method and system of Medium-frequency Inverter - Google Patents
A kind of three close-loop control method and system of Medium-frequency Inverter Download PDFInfo
- Publication number
- CN107370411A CN107370411A CN201710622593.9A CN201710622593A CN107370411A CN 107370411 A CN107370411 A CN 107370411A CN 201710622593 A CN201710622593 A CN 201710622593A CN 107370411 A CN107370411 A CN 107370411A
- Authority
- CN
- China
- Prior art keywords
- output
- inverter
- switching tube
- voltage
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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
- H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- 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
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention proposes a kind of three close-loop control method and system of Medium-frequency Inverter, it uses voltage effective value outer shroud, instantaneous voltage middle ring, current instantaneous value inner ring, and the method that three rings combine controls output waveform.The voltage effective value of outer shroud voltage effective value environmental protection card output is constant, middle ring is tracked to instantaneous voltage, the waveform of control output in real time, and current inner loop widens the bandwidth of system, accelerates dynamic response.Therefore, this control mode controls especially suitable for simulation, is got up simply using circuit realiration compared to other control methods, can be achieved using resistance, electric capacity, amplifier.And Each performs its own functions for each ring, cooperate control, can so improve voltage stabilizing rate, the coefficient of stabilization of output frequency and the stability of power-supply system of inverter output, suppresses the percent harmonic distortion exported in the case of nonlinear load.
Description
Technical field
The present invention relates to technical field of industrial control, the three close-loop control method of more particularly to a kind of Medium-frequency Inverter and side
Method.
Background technology
It is more and more extensive to the demand of the energy with aircraft industry, shipping industry and national defense industry fast development, and at this
In a little industries, output frequency (is more than 400Hz in the present invention, below 1000Hz inverter is referred to as by Medium-frequency Inverter
Intermediate frequency power supply) there is substantial amounts of application.Reliable energy supply power supply, determines whether large number quipments being capable of normal operations.
Although intermediate frequency power supply is identical with power frequency 50Hz power supply general principles, simply different in output frequency, this point
Difference can bring some problems in the control of waveform.By taking 400Hz power supplys as an example, under identical switching frequency, 400Hz electricity
Switch number only has 1/8th of 50Hz voltage switch numbers in one cycle of pressure, and switching the reduction of number most directly influences to be band
Come the distortion exported, harmonic content increase, waveform is distorted.On the other hand, inverter is modulated using PWM mode,
The generation of pwm signal will necessarily bring certain delay, shadow of the identical delay to Medium-frequency Inverter with conditioning on circuit
Ring many also bigger than the influence of 50Hz inverter.And the delay of PWM hardware circuits is almost by current hardware technology water
Flat to determine, method and the means for reducing delay are extremely limited.Based on above-mentioned both sides reason, in most cases, intermediate frequency is inverse
Variable power source control is by the way of simulation controls.
The control method for the inverter that most patents propose includes at present, PR control methods, track with zero error side
Method, repetitive control, fuzzy control method and neural network control method, it is discussed primarily directed to numerical control system
's.In the case of power frequency 50Hz outputs, these control methods can meet power supply output parameter, and (aberration rate, voltage stabilizing rate, frequency are steady
Determine rate, dynamic property etc.) requirement because output power frequency 50Hz frequencies it is relatively low, control frequency avoid the need for it is too high, control frequency
Relatively low to mean each controlling cycle, main control chip has sufficient time to carry out the dutycycle for calculating PWM cycle.Generally this
A little algorithms are complicated, and the calculating time is longer, realize that these complicated algorithm difficulty are great by the way of real-time Simulation control.
Therefore these control methods overwhelming majority is not suitable for the control of Medium-frequency Inverter.
The content of the invention
The technical problem to be solved in the present invention is：A kind of three close-loop control method and system of Medium-frequency Inverter is provided, its
Voltage stabilizing rate, the coefficient of stabilization of output frequency and the stability of power-supply system of Medium-frequency Inverter output can be improved, is effectively suppressed non-
The percent harmonic distortion exported in the case of linear load.
What the solution of the present invention was realized in：A kind of three close-loop control method of Medium-frequency Inverter, including it is following
Step：
Outer shroud voltage magnitude ring is formed, output voltage Uout is gathered in real time, with given output voltage amplitude reference value
Uref subtracts output voltage virtual value ︱ Uout ︱, then obtains voltage magnitude instruction U* through PI controllers, and voltage magnitude is instructed into U*
It is multiplied to obtain sinusoidal signal instruction Usin* with sinusoidal signal, instructs Usin* defeated as Medium-frequency Inverter sine sinusoidal signal
The reference gone out；
Middle ring instantaneous voltage ring is formed, sinusoidal signal instruction Usin* is subtracted each other with the output voltage Uout gathered in real time,
Obtain the output current reference instruction I* of inverter；
Inner ring electric current loop is formed, output current reference instruction I* is subtracted to the electric current Iout gathered in real time obtains output and refer to
Order.
Another technical scheme of the present invention is that on above-mentioned basis the output order obtains 4 after SPWM is modulated
Road drive signal PWM1-PWM4, the switching tube action of inverter is controlled respectively.
Another technical scheme of the present invention is on above-mentioned basis, in the middle ring instantaneous voltage ring, sine letter
After number instruction Usin* and output voltage Uout that gathers in real time subtracts each other, after first passing through the regulation output of PI controllers, then inversion is obtained
The output current reference instruction I* of device.
Another technical scheme of the present invention is on above-mentioned basis, and in the inner ring electric current loop, output current is joined
Examine after instructing I* to subtract the electric current Iout gathered in real time, after first passing through the regulation output of PI controllers, obtain output order.
Another technical scheme of the present invention is that on above-mentioned basis the inverter includes being used as dc bus branch
Dc bus the Support Capacitor C1, the dc bus Support Capacitor C1 of support positive pole and the switches of first switch pipe VT1 and the 3rd
Pipe VT3 colelctor electrode connection, negative pole and the second switch pipe VT2 and the 4th switching tube VT4 of the dc bus Support Capacitor C1
Emitter stage connection, the emitter stage of the first switch pipe VT1 is connected with the second switch pipe VT2 colelctor electrodes, the described 3rd
Switching tube VT3 emitter stage is connected with the colelctor electrode of the 4th switching tube VT4；The emitter stage of the first switch pipe VT1 with
The tie point of the second switch pipe VT2 colelctor electrodes and the emitter stage of the 3rd switching tube VT3 and the 4th switching tube VT4
The tie point of colelctor electrode connected with isolating the both ends of transformation TR1 sides, isolation transformation TR1 another side joint filter capacitor C2.
Another technical scheme of the present invention is on above-mentioned basis, additionally provides a kind of three rings of Medium-frequency Inverter
Control system, including inverter, Current Transmit 1 and voltage transformer T1, the Current Transmit 1 are used to adopt in real time
The output current Iout, the voltage transformer T1 for collecting inverter are used for the output voltage Uout for gathering inverter in real time,
The output voltage Uout collected in real time；
Output voltage virtual value ︱ Uout ︱ are obtained after the rectified filtration modules of output voltage Uout, with given output voltage
Amplitude reference value Uref subtracts output voltage virtual value ︱ Uout ︱, then obtains voltage magnitude instruction U* through PI controllers, by voltage
Amplitude instruction U* is multiplied to obtain sinusoidal signal instruction Usin* with sinusoidal signal, and sinusoidal signal is instructed into Usin* as medium frequency inverter
The reference of the sinusoidal output of power supply；
Sinusoidal signal instruction Usin* is subtracted each other with the output voltage Uout gathered in real time, obtains the output current of inverter
Reference instruction I*；
Output current reference instruction I* is subtracted to the electric current Iout gathered in real time and obtains output order；
Output order is obtained to 4 road drive signal PWM1-PWM4 after SPWM is modulated, controls the switch of inverter respectively
Pipe acts.
Another technical scheme of the present invention is that on above-mentioned basis the inverter includes being used as dc bus branch
Dc bus the Support Capacitor C1, the dc bus Support Capacitor C1 of support positive pole and the switches of first switch pipe VT1 and the 3rd
Pipe VT3 colelctor electrode connection, negative pole and the second switch pipe VT2 and the 4th switching tube VT4 of the dc bus Support Capacitor C1
Emitter stage connection, the emitter stage of the first switch pipe VT1 is connected with the second switch pipe VT2 colelctor electrodes, the described 3rd
Switching tube VT3 emitter stage is connected with the colelctor electrode of the 4th switching tube VT4；The emitter stage of the first switch pipe VT1 with
The tie point of the second switch pipe VT2 colelctor electrodes and the emitter stage of the 3rd switching tube VT3 and the 4th switching tube VT4
The tie point of colelctor electrode connected with isolating the both ends of transformation TR1 sides, isolation transformation TR1 another side joint filter capacitor C2.
Another technical scheme of the present invention is on above-mentioned basis, the pulse voltage of inverter output, then
Sinusoidal voltage is obtained after filtered circuit.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
In embodiment provided by the invention, a kind of three close-loop control method and system of Medium-frequency Inverter is proposed, it is adopted
With voltage effective value outer shroud, instantaneous voltage middle ring, current instantaneous value inner ring, method that three rings combine controls output waveform.
The voltage effective value of outer shroud voltage effective value environmental protection card output is constant, and middle ring is tracked to instantaneous voltage, is controlled in real time defeated
The waveform gone out, current inner loop widen the bandwidth of system, accelerate dynamic response.Therefore, this control mode is especially suitable for mould
Intend control, got up simply using circuit realiration compared to other control methods, can be achieved using resistance, electric capacity, amplifier.And
Each performs its own functions for each ring, and cooperate control, can so improve voltage stabilizing rate, the coefficient of stabilization of output frequency of inverter output
With the stability of power-supply system, suppress the percent harmonic distortion exported in the case of nonlinear load.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is the structured flowchart of the three close-loop control system of Medium-frequency Inverter in one embodiment of the present invention；
Fig. 2 is the topology diagram of inverter in three close-loop control system described in Fig. 1.
Embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings, and the description of this part is only exemplary and explanatory, should not
There is any restriction effect to protection scope of the present invention.In addition, description of the those skilled in the art according to this document, can be right
Feature in this document in embodiment and in different embodiments carries out respective combination.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
The (if present)s such as four " are for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution so uses can exchange in the appropriate case, so as to embodiments of the invention described herein, such as can be with
Order in addition to those for illustrating or describing herein is implemented.In addition, term " comprising " and " having " and their times
What deform, it is intended that cover it is non-exclusive include, for example, contain the process of series of steps or unit, method, system,
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include not list clearly or for
The intrinsic other steps of these processes, method, product or equipment or unit.The example of the embodiment is shown in the drawings, its
In from beginning to end same or similar label represent same or similar element or the element with same or like function.Below
The embodiment described by reference to accompanying drawing is exemplary, is only used for explaining the present invention, and it is not intended that to limit of the invention
System.On the contrary, embodiments of the invention include falling into the range of the spirit and intension of attached claims all changes, repair
Change and equivalent.The description of this part is only exemplary and explanatory, should not there is any limitation to protection scope of the present invention
Effect., can be in embodiment in this document and different embodiments in addition, description of the those skilled in the art according to this document
In feature carry out respective combination.In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited,
Term " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary.
For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.This
Outside, in the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.In flow chart or herein
Any process or method description described otherwise above is construed as, and expression includes one or more for realizing spy
Module, fragment or the part of the code of the executable instruction for the step of determining logic function or process, and the preferred reality of the present invention
Applying the scope of mode includes other realization, wherein order that is shown or discussing can not be pressed, including according to involved work(
Can by it is basic and meanwhile in the way of or in the opposite order, carry out perform function, this should be by embodiments of the invention art
Technical staff understood.
The embodiment of the present invention is as follows, a kind of three close-loop control method of Medium-frequency Inverter, comprises the following steps：
Outer shroud voltage magnitude ring is formed, output voltage Uout is gathered in real time, with given output voltage amplitude reference value
Uref subtracts output voltage virtual value ︱ Uout ︱, then obtains voltage magnitude instruction U* through PI controllers, and voltage magnitude is instructed into U*
It is multiplied to obtain sinusoidal signal instruction Usin* with sinusoidal signal, instructs Usin* defeated as Medium-frequency Inverter sine sinusoidal signal
The reference gone out；
Middle ring instantaneous voltage ring is formed, sinusoidal signal instruction Usin* is subtracted each other with the output voltage Uout gathered in real time,
After the regulation output of PI controllers, the output current reference instruction I* of inverter is obtained；
Inner ring electric current loop is formed, output current reference instruction I* is subtracted to the electric current Iout gathered in real time, controlled by PI
After device regulation output, output order is obtained.
On the basis of above-described embodiment, in another embodiment of the present invention, the output order obtains 4 after SPWM is modulated
Road drive signal PWM1-PWM4, the switching tube action of inverter is controlled respectively.The pulse voltage of inverter output, through filter
Wave circuit can be obtained by clean sinusoidal voltage.
On the basis of above-described embodiment, in another embodiment of the present invention, the inverter includes being used as dc bus
The dc bus Support Capacitor C1 of support, the positive pole of the dc bus Support Capacitor C1 are opened with first switch pipe VT1 and the 3rd
Close pipe VT3 colelctor electrode connection, negative pole and second switch pipe VT2 and the 4th switching tube of the dc bus Support Capacitor C1
VT4 emitter stage connection, the emitter stage of the first switch pipe VT1 is connected with the second switch pipe VT2 colelctor electrodes, and described the
Three switching tube VT3 emitter stage is connected with the colelctor electrode of the 4th switching tube VT4；The emitter stage of the first switch pipe VT1
With the tie point of the second switch pipe VT2 colelctor electrodes and the emitter stage of the 3rd switching tube VT3 and the 4th switching tube
The tie point of VT4 colelctor electrode connects with isolating the both ends of transformation TR1 sides, isolation transformation TR1 another side joint filter capacitor
C2。
As depicted in figs. 1 and 2, the three close-loop control system of a kind of Medium-frequency Inverter, including inverter, current transformer
CT1 and voltage transformer T1, the Current Transmit 1 are used for the output current Iout for gathering inverter in real time, the electricity
Transformer T1 is pressed to be used for the output voltage Uout, the output voltage Uout collected in real time for gathering inverter in real time；
Output voltage virtual value ︱ Uout ︱ are obtained after the rectified filtration modules of output voltage Uout, with given output voltage
Amplitude reference value Uref subtracts output voltage virtual value ︱ Uout ︱, then obtains voltage magnitude instruction U* through PI controllers, by voltage
Amplitude instruction U* is multiplied to obtain sinusoidal signal instruction Usin* with sinusoidal signal, and sinusoidal signal is instructed into Usin* as medium frequency inverter
The reference of the sinusoidal output of power supply, this part is outer shroud voltage magnitude ring.
Sinusoidal signal instruction Usin* is subtracted each other with the output voltage Uout gathered in real time, adjusts and exports by PI controllers
Afterwards, the output current reference instruction I* of inverter is obtained, this part is middle ring instantaneous voltage ring.
Output current reference instruction I* is subtracted to the electric current Iout gathered in real time, after the regulation output of PI controllers, obtained
To output order, this part is inner ring electric current loop.
Output order is obtained to 4 road drive signal PWM1-PWM4 after SPWM is modulated, controls the switch of inverter respectively
Pipe acts.So the pulse voltage of inverter output, filtered circuit can be obtained by clean sinusoidal voltage.
On the basis of above-described embodiment, in another embodiment of the present invention, the inverter includes being used as dc bus
The dc bus Support Capacitor C1 of support, the positive pole of the dc bus Support Capacitor C1 are opened with first switch pipe VT1 and the 3rd
Close pipe VT3 colelctor electrode connection, negative pole and second switch pipe VT2 and the 4th switching tube of the dc bus Support Capacitor C1
VT4 emitter stage connection, the emitter stage of the first switch pipe VT1 is connected with the second switch pipe VT2 colelctor electrodes, and described the
Three switching tube VT3 emitter stage is connected with the colelctor electrode of the 4th switching tube VT4；The emitter stage of the first switch pipe VT1
With the tie point of the second switch pipe VT2 colelctor electrodes and the emitter stage of the 3rd switching tube VT3 and the 4th switching tube
The tie point of VT4 colelctor electrode connects with isolating the both ends of transformation TR1 sides, isolation transformation TR1 another side joint filter capacitor
C2.So, by TR1 to isolate transformation, security isolation input and output voltage, while output voltage is filtered out by filter capacitor C2
In harmonic wave so that output reaches the required value of parameter.
On the basis of above-described embodiment, in another embodiment of the present invention, the pulse voltage of the inverter output, then
Sinusoidal voltage is obtained after filtered circuit.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
In embodiment provided by the invention, a kind of three close-loop control method and system of Medium-frequency Inverter is proposed, it is adopted
With three close-loop control, by using voltage effective value outer shroud, instantaneous voltage middle ring, current instantaneous value inner ring, the side that three rings combine
Method controls output waveform.The voltage effective value of outer shroud voltage effective value environmental protection card output is constant, and middle ring is entered to instantaneous voltage
Line trace, the waveform of control output in real time, current inner loop widen the bandwidth of system, accelerate dynamic response, the side that three rings combine
Method controls inverter output waveform.Therefore, this control mode controls especially suitable for simulation, compared to other controlling parties
Method is got up simply using circuit realiration, can be achieved using resistance, electric capacity, amplifier.And Each performs its own functions for each ring, cooperate
Control, voltage stabilizing rate, the coefficient of stabilization of output frequency and the stability of power-supply system of inverter output can be so improved, suppressed
The percent harmonic distortion exported in the case of nonlinear load.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of three close-loop control method of Medium-frequency Inverter, it is characterised in that comprise the following steps：
Outer shroud voltage magnitude ring is formed, output voltage Uout is gathered in real time, is subtracted with given output voltage amplitude reference value Uref
Output voltage virtual value ︱ Uout ︱ are removed, then voltage magnitude instruction U* is obtained through PI controllers, voltage magnitude is instructed into U* and sine
Signal multiplication obtains sinusoidal signal instruction Usin*, and sinusoidal signal is instructed into ginsengs of the Usin* as the sinusoidal output of Medium-frequency Inverter
Examine；
Middle ring instantaneous voltage ring is formed, sinusoidal signal instruction Usin* is subtracted each other with the output voltage Uout gathered in real time, obtained
The output current reference instruction I* of inverter；
Inner ring electric current loop is formed, output current reference instruction I* is subtracted to the electric current Iout gathered in real time and obtains output order.
2. the three close-loop control method of Medium-frequency Inverter according to claim 1, it is characterised in that the output order warp
4 road drive signal PWM1-PWM4 are obtained after SPWM modulation, control the switching tube action of inverter respectively.
3. the three close-loop control method of Medium-frequency Inverter according to claim 2, it is characterised in that the middle loop voltag wink
In duration ring, after sinusoidal signal instruction Usin* subtracts each other with the output voltage Uout gathered in real time, it is defeated to first pass through the regulation of PI controllers
After going out, then obtain the output current reference instruction I* of inverter.
4. the three close-loop control method of Medium-frequency Inverter according to claim 2, it is characterised in that the inner ring electric current loop
In, after output current reference instruction I* is subtracted into the electric current Iout gathered in real time, after first passing through the regulation output of PI controllers, obtain
Output order.
5. the three close-loop control method of Medium-frequency Inverter according to any one of claim 1 to 4, it is characterised in that institute
The dc bus Support Capacitor C1 that inverter includes supporting as dc bus is stated, the dc bus Support Capacitor C1 is just
Pole is connected with first switch pipe VT1 and the 3rd switching tube VT3 colelctor electrode, the negative pole of the dc bus Support Capacitor C1 and
Two switching tube VT2 and the 4th switching tube VT4 emitter stage connection, the emitter stage of the first switch pipe VT1 are opened with described second
The connection of pipe VT2 colelctor electrodes is closed, the emitter stage of the 3rd switching tube VT3 is connected with the colelctor electrode of the 4th switching tube VT4；Institute
State first switch pipe VT1 emitter stage and the tie point of the second switch pipe VT2 colelctor electrodes and the 3rd switching tube VT3
Emitter stage connects with the tie point of the colelctor electrode of the 4th switching tube VT4 with isolating the both ends of transformation TR1 sides, isolates transformation
TR1 another side joint filter capacitor C2.
6. a kind of three close-loop control system of Medium-frequency Inverter, including inverter, it is characterised in that also including current transformer
CT1 and voltage transformer T1, the Current Transmit 1 are used for the output current Iout for gathering inverter in real time, the electricity
Transformer T1 is pressed to be used for the output voltage Uout, the output voltage Uout collected in real time for gathering inverter in real time；
Output voltage virtual value ︱ Uout ︱ are obtained after the rectified filtration modules of output voltage Uout, with given output voltage amplitude
Reference value Uref subtracts output voltage virtual value ︱ Uout ︱, then obtains voltage magnitude instruction U* through PI controllers, by voltage magnitude
Instruction U* is multiplied to obtain sinusoidal signal instruction Usin* with sinusoidal signal, and sinusoidal signal is instructed into Usin* as Medium-frequency Inverter
The reference of sine output；
Sinusoidal signal instruction Usin* is subtracted each other with the output voltage Uout gathered in real time, obtains the output current reference of inverter
Instruct I*；
Output current reference instruction I* is subtracted to the electric current Iout gathered in real time and obtains output order；
Output order is obtained to 4 road drive signal PWM1-PWM4 after SPWM is modulated, controls the switching tube of inverter to move respectively
Make.
7. the three close-loop control system of Medium-frequency Inverter according to claim 6, it is characterised in that the inverter bag
Include the dc bus Support Capacitor C1 as dc bus support, the positive pole and first switch of the dc bus Support Capacitor C1
Pipe VT1 and the 3rd switching tube VT3 colelctor electrode connect, negative pole and the second switch pipe VT2 of the dc bus Support Capacitor C1
Connected with the 4th switching tube VT4 emitter stage, the emitter stage of the first switch pipe VT1 and the second switch pipe VT2 current collections
Pole is connected, and the emitter stage of the 3rd switching tube VT3 is connected with the colelctor electrode of the 4th switching tube VT4；The first switch
Pipe VT1 emitter stage and the tie point of the second switch pipe VT2 colelctor electrodes and emitter stage and the institute of the 3rd switching tube VT3
The tie point for stating the 4th switching tube VT4 colelctor electrode connects with the both ends for isolating transformation TR1 sides, and isolation transformation TR1's is another
Side joint filter capacitor C2.
8. the three close-loop control system of Medium-frequency Inverter according to claim 6, it is characterised in that the inverter is defeated
Sinusoidal voltage is obtained after the pulse voltage gone out, then filtered circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622593.9A CN107370411A (en) | 2017-07-27 | 2017-07-27 | A kind of three close-loop control method and system of Medium-frequency Inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622593.9A CN107370411A (en) | 2017-07-27 | 2017-07-27 | A kind of three close-loop control method and system of Medium-frequency Inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107370411A true CN107370411A (en) | 2017-11-21 |
Family
ID=60308550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710622593.9A Pending CN107370411A (en) | 2017-07-27 | 2017-07-27 | A kind of three close-loop control method and system of Medium-frequency Inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107370411A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872462A (en) * | 2021-09-24 | 2021-12-31 | 深圳市伊力科电源有限公司 | Output voltage control method and system, single-phase inverter power supply and storage medium |
| CN114243765A (en) * | 2021-12-03 | 2022-03-25 | 合肥科威尔电源系统股份有限公司 | Parallel operation control method, device and equipment for power grid analog power supply and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309054A (en) * | 2008-06-20 | 2008-11-19 | 南京航空航天大学 | Three-level double boost energy feedback PWM rectification circuit and control method thereof |
| CN103840547A (en) * | 2014-03-13 | 2014-06-04 | 漳州科华技术有限责任公司 | Isolated multi-path complex output uninterruptible power supply and control method thereof |
| CN103887824A (en) * | 2014-04-17 | 2014-06-25 | 浙江大学 | Voltage loop ripple compensation control system and control method of photovoltaic grid-connected inverter |
| CN204334368U (en) * | 2014-11-29 | 2015-05-13 | 刘尚爱 | A kind of photovoltaic generating system |
| CN103107553B (en) * | 2011-11-11 | 2015-07-29 | 北京能高自动化技术股份有限公司 | Based on the Wind turbines Grid-connected Control Strategy of Discrete Nonlinear inverse system voltage feedforward |
-
2017
- 2017-07-27 CN CN201710622593.9A patent/CN107370411A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309054A (en) * | 2008-06-20 | 2008-11-19 | 南京航空航天大学 | Three-level double boost energy feedback PWM rectification circuit and control method thereof |
| CN103107553B (en) * | 2011-11-11 | 2015-07-29 | 北京能高自动化技术股份有限公司 | Based on the Wind turbines Grid-connected Control Strategy of Discrete Nonlinear inverse system voltage feedforward |
| CN103840547A (en) * | 2014-03-13 | 2014-06-04 | 漳州科华技术有限责任公司 | Isolated multi-path complex output uninterruptible power supply and control method thereof |
| CN103887824A (en) * | 2014-04-17 | 2014-06-25 | 浙江大学 | Voltage loop ripple compensation control system and control method of photovoltaic grid-connected inverter |
| CN204334368U (en) * | 2014-11-29 | 2015-05-13 | 刘尚爱 | A kind of photovoltaic generating system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872462A (en) * | 2021-09-24 | 2021-12-31 | 深圳市伊力科电源有限公司 | Output voltage control method and system, single-phase inverter power supply and storage medium |
| CN113872462B (en) * | 2021-09-24 | 2024-05-03 | 深圳市伊力科电源有限公司 | Output voltage control method, system, single-phase inverter power supply and storage medium |
| CN114243765A (en) * | 2021-12-03 | 2022-03-25 | 合肥科威尔电源系统股份有限公司 | Parallel operation control method, device and equipment for power grid analog power supply and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mahanty | Indirect current controlled shunt active power filter for power quality improvement | |
| Leon et al. | Non-linear optimal controller for unified power quality conditioners | |
| CN107332244A (en) | The level SAPF of three-phase four-wire system NPC types three nonlinear control method | |
| Sreejyothi et al. | Level-Shifted PWM Techniques Applied to Flying Capacitor Multilevel Inverter | |
| CN107370411A (en) | A kind of three close-loop control method and system of Medium-frequency Inverter | |
| Boukadoum et al. | Power quality improvement using fuzzy logic controlled voltage source PWM rectifiers | |
| Benaissa et al. | Power quality improvement using fuzzy logic controller for five-level shunt active power filter under distorted voltage conditions | |
| Rajagopal et al. | Shunt active filter based on 7-level cascaded multilevel inverter for harmonic and reactive power compensation | |
| Salam et al. | Fuzzy logic controller for shunt active power filter | |
| Lin et al. | Analysis and implementation of a three-level active filter with a reduced number of power semiconductors | |
| Elhaj et al. | DFPI-based Control of the DC-bus Voltage and the AC-side Current of a Shunt Active Power Filter | |
| Cheng et al. | A modified one cycle control of Vienna rectifier for neutral point voltage balancing control based on cycle-by-cycle correction | |
| Singh et al. | A novel reduced-rule fuzzy logic based self-supported dynamic voltage restorer for mitigating diverse power quality problems | |
| Benyettou et al. | Comparative study of different methods of active power compensation | |
| Karaman et al. | Performing reactive power compensation of three-phase induction motor by using parallel active power filter | |
| Kumar et al. | LCL Filter Design and Performance Analysis for Grid Interconnected Systems | |
| Sajjadi et al. | SVPWM-based dual active filter for distribution system power quality improvement | |
| Farahat et al. | Active filter for power quality improvement by artificial neural networks technique | |
| Hou et al. | Adaptive fuzzy sliding control with fuzzy sliding term for three-phase active power filter | |
| Abdelsalam et al. | Distribution system performance enhancement using power filter/compensator device | |
| Chau | Generalized current delay compensation on hybrid active power filter | |
| Darnet et al. | Input currents DCM modelling of a Vienna-based rectifier | |
| Abed | A three phase photovoltaic grid tied inverter system control based on TS Fuzzy equalization | |
| Bouzidi et al. | Backstepping-Direct power control of three-level four-leg shunt active power filter | |
| Zhang et al. | DC impedance modeling of push-pull DC auto-transformer for MMC and LCC HVDC interconnections |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171121 |