CN106385188A - Single phase inverter control technology based on space coordinator conversion - Google Patents
Single phase inverter control technology based on space coordinator conversion Download PDFInfo
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- CN106385188A CN106385188A CN201611070010.8A CN201611070010A CN106385188A CN 106385188 A CN106385188 A CN 106385188A CN 201611070010 A CN201611070010 A CN 201611070010A CN 106385188 A CN106385188 A CN 106385188A
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- phase
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- inverter
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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
- H02M7/42—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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a single phase inverter control technology based on space coordinator conversion. The single phase inverter control technology comprises steps of (1) constructing standard signals UA=UOSin (alpha +90 degree), UB=UOSin (alpha-30 degree), and UC=UOSin (alpha +210 degree) of an A phase, a B phase and a C phase; (2) controlling output of the A phase, taking practical output of the A phase as one of feedback signals, transmitting signals of the B phase and the C phase to a 3/2 coordinate conversion link simultaneously along with the signal of the A phase to perform conversion, wherein the signals of the B phase and the C phase are constructed standard signals; (3) adopting a PI controller to realize indifference control on an amplitude and a phase of the signals of the A phase. The single phase inverter control technology converts sine wave output of the single phase inverter to 2 DC components which respectively correspond to an amplitude and a phase of sine output of the inverter on a dq plane, adopts the PI controller to perform indifference control on the two components and realizes indifference control on the amplitude and the phase outputted by the sine wave of the single-phase inverter.
Description
Technical field
The present invention relates to technical field of inverter control, more particularly, to a kind of single-phase inverter based on space coordinate conversion
Control technology.
Background technology
Inverter for ups power is widely used in each field of national economy, existing space
The sine wave that the control technology of Coordinate Conversion is only used for exporting is the occasion of three-phase symmetrical, that is, be output as the three-phase three of no zero line
The operating mode of line, such as converter, three-phase grid-connected inverter；For for the single-phase inverter of UPS and be output as without transformator
Three-phase four-wire system inverter, then can not adopt the control technology of space coordinate conversion, AC sine wave signal can only be adopted
Tracking technique, is respectively controlled to each mutually output；Because set-point is AC sine wave signal, therefore, this control device exists
It is not the control system that static difference is zero in theory.
If the output valve of inverter one-phase sine wave signal can be become the direct current on dq axle by space coordinate conversion
Signal, then, you can realize output and the zero steady state error control of input, improve the index of quality of inverter output waveforms.
Content of the invention
It is an object of the invention to proposing a kind of single-phase inverter control technology based on space coordinate conversion, by adopting
It is defeated that Coordinate Conversion technology 2 that the sinewave output of single-phase inverter is converted in dq plane correspond respectively to inverter sine
The amplitude going out and the DC component of phase place, then carry out indifference control using PI controller against 2 components, to realize single-phase inverse
The indifference of the amplitude and phase place that become device sinewave output controls.
For reaching this purpose, the present invention employs the following technical solutions：
A kind of single-phase inverter control technology based on space coordinate conversion, comprises the following steps：
(1) build the standard signal U of A, B, C three-phaseA=UOSin(α+90°)、UB=UOSin(α-30°)、UC=UOSin(α
+210°)；
(2) control the output of A phase, the reality output of A phase is used and built as feeding back one of signal, the signal of B and C phase
Standard signal, be simultaneously sent in 3/2 Coordinate Conversion link be changed with A phase signals；
(3) adopt PI controller, realize the amplitude to A phase signals and the indifference of phase place controls.
More excellent, described 3/2 Coordinate Conversion link is the U being determined by three phase static coordinate axessA、UB、UCIt is transformed into UdWith
UqOn defined Plane of rotation.
More excellent, the formula that described three phase static coordinate axess are transformed into Plane of rotation is
Ud=UA*COS α+UB*COS (120 ° of-α)+UC*COS (240 ° of-α)
Uq=UA*COS (90 ° of+α)+UB*COS (30 ° of-α)+UC*COS (150 ° of-α).
More excellent, the method for the output of control A phase in described step (1) (2) (3), can be used for controlling B phase or the output of C phase.
More excellent, described α is to control the lock of the set-point of inverter sine wave output phase angle, power supply according to different demands
The mutually integration of the given output frequency of output or inverter.
The present invention is by using Coordinate Conversion technology, the sinewave output of single-phase inverter is converted in dq plane 2
Correspond respectively to the amplitude of the sinusoidal output of inverter and the DC component of phase place, then entered against 2 components using PI controller
Row indifference controls, and the indifference of the amplitude and phase place to realize single-phase inverter sinewave output controls.
Brief description
Fig. 1 is the A phase output control block diagram of the embodiment of the present invention；
Fig. 2 is the coordinate schematic diagram of the embodiment of the present invention.
Specific embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by specific embodiment mode.
A kind of single-phase inverter control technology based on space coordinate conversion, comprises the following steps：
(1) build the standard signal U of A, B, C three-phaseA=UOSin(α+90°)、UB=UOSin(α-30°)、UC=UOSin(α
+210°)；
(2) control the output of A phase, the reality output of A phase is used and built as feeding back one of signal, the signal of B and C phase
Standard signal, be simultaneously sent in 3/2 Coordinate Conversion link be changed with A phase signals；
(3) adopt PI controller, realize the amplitude to A phase signals and the indifference of phase place controls.
The inverter of single-phase voltage output at present is typically operated using the principle that sine wave is followed, and has following several
Individual link composition：The AC sine wave signal of output is followed link, output pre-control link and output signal virtual value indifference and is adjusted
Section link, shortcoming is that the virtual value of prior art output employs PI controller, and therefore, the output of prior art is a width
Value indifference system, but output phase place with input phase place still have poor, therefore, when using 3 such single-phase dresses
After putting one 3 phase system of composition, when loading asymmetric it is impossible to strictly ensure 120 degree of 3 phase output voltage mutual deviation.
The present invention is converted into the sinewave output of single-phase inverter using Coordinate Conversion technology 2 difference in dq plane
Then this 2 components are carried out no by the amplitude corresponding to the sinusoidal output of inverter and the DC component of phase place using PI controller
Difference controls, and so can achieve that the amplitude of single-phase inverter sinewave output and the indifference of phase place control.As shown in figure 1, this example
The output of middle control A phase, just using the reality output of A phase one of as feedback signal, and the signal of B and C phase is using " the mark building
Calibration signal ", is simultaneously sent in 3/2 Coordinate Conversion link be changed with A phase signals；Because the signal of B and C phase is using structure
Standard signal, therefore, after conversion, in dq plane, the change of the direct current signal of output is just only relevant with A phase signals, therefore, adopts
PI controller, you can realize the amplitude to A phase signals and the indifference of phase place controls.For B and C phase, can be using same with A phase signals
The method of sample is controlled.
Further description, described 3/2 Coordinate Conversion link is the U being determined by three phase static coordinate axessA、UB、UCTurn
Change to UdAnd UqOn defined Plane of rotation.
Further description, the formula that described three phase static coordinate axess are transformed into Plane of rotation is
Ud=UA*COS α+UB*COS (120 ° of-α)+UC*COS (240 ° of-α)
Uq=UA*COS (90 ° of+α)+UB*COS (30 ° of-α)+UC*COS (150 ° of-α).
Scheme as indicated with 2, if 3 phase voltages U of inverter outputA、UBAnd UCExpression formula as follows：UA=UOUB=UO
UC=UO.By UA、UB、UCIt is placed in as on 3 coordinate axess of Fig. 2 plane, that is, allowed UAPoint to 0 degree of direction, UBPoint to 120 degree of directions, UC
Point to 240 degree of directions；Plane as defined in two coordinate axess of the XY in rectangular coordinate system, the U of in figureA、UBAnd UCRepresent by
3 planes defined in the coordinate of hexagonal angle degree each other；Number on 3 coordinates is real number, the rightabout of 3 coordinate axess intersection points
For negative.As UA、UBAnd UCRegard 3 vectors in this plane as, according to the principle of Vector modulation, this 3 vectors can synthesize one
Vector.When ω t increases, the track by the vector end-points of this 3 Vector modulation is a circle of counterclockwise rotates.Enter one
Step analysis understands, the mould of this resultant vector is 1.5UO；
If the U in Fig. 2d、UqFor 2 rotatable coordinate axis in this plane, by the plane that this 2 coordinate axess are determined be with
During ω t change and resultant vector synchronous rotary.We are UdReferred to as real axis, advanced Ud90 ° of UqThe referred to as imaginary axis；According to seat
Mark transfer principle, we can be the U being determined by 3 phase static coordinate axlesA、UBAnd UCIt is transformed into UdAnd UqDefined rotary flat
On face；If UdAxle and UqThe angle of axle is α, and the formula being converted directly into 2 cordic phase rotators by 3 phase static coordinate is as follows：
Ud=UA*COSα+UB*COS(120°-α)+UC*COS(240°-α)
Uq=UA*COS(90°+α)+UB*COS(30°-α)+UC*COS(150°-α)
Because 2 DC quantity information in dq plane contain amplitude and phase information, therefore, controlled using traditional PI
Device, can accomplish that the amplitude of inverter output and the indifference of phase place control in theory.
Further description, the method controlling the output of A phase in described step (1) (2) (3), can be used for controlling B phase or
C phase exports.
Further description, described α according to different demands be control inverter sine wave output phase angle set-point,
The lock of power supply mutually export or inverter given output frequency integration.
As shown in figure 1, α is the set-point controlling inverter sine wave output phase angle, the such as output of inverter requires and certain
Individual line lock, then α is that the lock of this power supply mutually exports, and for the separate inverter unit of asynchronous type, then α is the given defeated of inverter
Go out the integration of frequency.
Describe the know-why of the present invention above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed to by any way.Based on explanation herein, the technology of this area
Personnel do not need to pay other specific embodiments that performing creative labour can associate the present invention, and these modes fall within
Within protection scope of the present invention.
Claims (5)
1. a kind of single-phase inverter control technology based on space coordinate conversion is it is characterised in that comprise the following steps：
(1) build the standard signal U of A, B, C three-phaseA=UOSin(α+90°)、UB=UOSin(α-30°)、UC=UOSin(α+
210°)；
(2) control the output of A phase, the reality output of A phase is used, as feeding back one of signal, the signal of B and C phase, the mark building
Calibration signal, is simultaneously sent in 3/2 Coordinate Conversion link be changed with A phase signals；
(3) adopt PI controller, realize the amplitude to A phase signals and the indifference of phase place controls.
2. a kind of single-phase inverter control technology based on space coordinate conversion according to claim 1 it is characterised in that：
Described 3/2 Coordinate Conversion link is the U being determined by three phase static coordinate axessA、UB、UCIt is transformed into UdAnd UqDefined rotary flat
On face.
3. a kind of single-phase inverter control technology based on space coordinate conversion according to claim 3 it is characterised in that：
The formula that described three phase static coordinate axess are transformed into Plane of rotation is
Ud=UA*COS α+UB*COS (120 ° of-α)+UC*COS (240 ° of-α)
Uq=UA*COS (90 ° of+α)+UB*COS (30 ° of-α)+UC*COS (150 ° of-α).
4. a kind of single-phase inverter control technology based on space coordinate conversion according to claim 1 it is characterised in that：
The method controlling the output of A phase in described step (1) (2) (3), can be used for controlling B phase or the output of C phase.
5. a kind of single-phase inverter control technology based on space coordinate conversion according to claim 2 it is characterised in that：
Described α is to control the set-point of inverter sine wave output phase angle, the lock of power supply mutually to export or inverter according to different demands
Given output frequency integration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611070010.8A CN106385188A (en) | 2016-11-29 | 2016-11-29 | Single phase inverter control technology based on space coordinator conversion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611070010.8A CN106385188A (en) | 2016-11-29 | 2016-11-29 | Single phase inverter control technology based on space coordinator conversion |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621252B2 (en) * | 2001-10-19 | 2003-09-16 | General Electric Company | Control of single-phase power converter in D-Q rotating coordinates |
| CN102255541A (en) * | 2011-07-19 | 2011-11-23 | 中国船舶重工集团公司第七一九研究所 | Single-phase inverter capable of performing instantaneous control under dq coordinate system and control method |
| CN102778599A (en) * | 2012-07-10 | 2012-11-14 | 苏州张扬能源科技有限公司 | Method for detecting one-way voltage of solar panel in real time |
| CN103683331A (en) * | 2013-12-26 | 2014-03-26 | 电子科技大学 | Single-phase inverter control system |
-
2016
- 2016-11-29 CN CN201611070010.8A patent/CN106385188A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6621252B2 (en) * | 2001-10-19 | 2003-09-16 | General Electric Company | Control of single-phase power converter in D-Q rotating coordinates |
| CN102255541A (en) * | 2011-07-19 | 2011-11-23 | 中国船舶重工集团公司第七一九研究所 | Single-phase inverter capable of performing instantaneous control under dq coordinate system and control method |
| CN102778599A (en) * | 2012-07-10 | 2012-11-14 | 苏州张扬能源科技有限公司 | Method for detecting one-way voltage of solar panel in real time |
| CN103683331A (en) * | 2013-12-26 | 2014-03-26 | 电子科技大学 | Single-phase inverter control system |
Non-Patent Citations (1)
| Title |
|---|
| 张永丽: "三相逆变电源的数字化实现及电磁兼容性研究", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅱ辑》 * |
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Application publication date: 20170208 |
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