CN100521491C - Inverter control method and apparatus - Google Patents
Inverter control method and apparatus Download PDFInfo
- Publication number
- CN100521491C CN100521491C CNB2005100622439A CN200510062243A CN100521491C CN 100521491 C CN100521491 C CN 100521491C CN B2005100622439 A CNB2005100622439 A CN B2005100622439A CN 200510062243 A CN200510062243 A CN 200510062243A CN 100521491 C CN100521491 C CN 100521491C
- Authority
- CN
- China
- Prior art keywords
- parts
- control
- inverter
- subtraction
- voltage
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001939 inductive effect Effects 0.000 claims description 40
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000001965 increasing effect Effects 0.000 description 4
- 230000035772 mutation Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000009514 concussion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
This invention relates to inverter control method and its device, wherein, the method comprises the following steps: getting difference by minus output voltage from voltage reference value to process basic inductance current reference current through voltage control; then processing the generated output volume to get inductance current reference through non-linear control process; minus the inductance current feedback current into current error; finally after control process controlling the inverter. The device is composed orderly by minus parts, voltage control ring parts, minus parts, inductance current control adjusting parts and adding parts set between the voltage control ring adjusting parts and minus parts and non-linear control structure connected to the adding parts.
Description
Technical field
The present invention relates to inverter, be specifically related to a kind of control method and control device that can effectively improve the dynamic and static state performance of inverter under the nonlinear load condition.
Background technology
Along with increasing of power consumption equipment, the kind of nonlinear load, quantity and proportion also increase sharply, and harmonic wave is serious day by day to the pollution of electric power system.Inverter is as a kind of main communication power supply, more and more faces the problem of nonlinear load when for example gaseous discharge lamp starts (comprise the instantaneous mutation load equivalent load and periodic for example rectification type load of nonlinear load) in the application.Inverter is when the band nonlinear load, its output waveform can distort, general phenomenon is exactly that output voltage produces the instantaneous top of falling, cut, the output waveform concussion can appear when serious, can not steady operation, so just can't guarantee high-performance, complete sinusoidal output waveform, thereby influence the normal operation of other loads of inverter, even cause device damage.
Inverter mainly contains PID (ratio-integration-differential) control, internal model control, dead beat control, Sliding mode variable structure control and Based Intelligent Control at the solution of the relevant control technology of nonlinear load problem at present.The general dicyclo PID structure that adopts of PID control, it can obtain reasonable dynamic property; But under the nonlinear load condition, current inner loop needs very fast speed, thereby the controller of this form has certain restriction to the inhibition ability of nonlinear disturbance.Internal model control comprises mainly and repeats control and coordinate axis transform (Reference frame) control that it can effectively improve the output waveform under the limit, has still sacrificed dynamic property.Dead beat be controlled in theory can be in a control cycle track reference waveform, but its needs inverter and load module accurately, concussion even can't steady operation takes place in the too high gain simultaneously system that makes easily.Sliding mode variable structure control is utilized state variable that certain discontinuous switch control strategy forces system a certain pre-designed " sliding mode " orbiting motion in the phase plane, and it has parameter is changed and the insensitive advantage of external disturbance.But the desirable sliding formwork diverter surface of inverter is difficult to choose; Secondly, Sliding mode variable structure control has only employing just to have big using value when enough the digital form of high sample frequency realizes.Based Intelligent Control has stronger robustness and adaptivity, but because the restriction of state-of-the art, Based Intelligent Control still is in the stage of research.
Summary of the invention
The purpose of this invention is to provide a kind of improve inverter under instantaneous mutation load and periodic nonlinear load condition stable state and the control method and the control device of dynamic property.Do not influence simultaneously the operate as normal of inverter under linear loading condition again.
The objective of the invention is to realize by following proposal:
The control method of inverter
1) in default voltage reference value, deducts the feedback quantity of output voltage, obtain voltage error through the subtraction link;
2) described voltage error is handled through the voltage control loop governing loop, generates basic inductive current reference quantity;
3) in basic inductive current reference quantity, add the output variable that generates by the nonlinear Control link through the addition link, obtain the inductive current reference quantity as the circuit controlled quentity controlled variable, described output variable is by the error governing loop of nonlinear Control link described voltage error to be handled, the variable of formation voltage error, output current governing loop and absolute value transform part through the nonlinear Control link are handled successively to the feedback quantity of output current, the feedback quantity of the output current after handling and the variable of voltage error are carried out multiplying through the multiplication link, the product output variable that obtains obtains after the amplitude limit controlling unit is handled;
4) in described inductive current reference quantity, deduct the inductor current feedback amount, obtain the inductive current error through the subtraction link;
5) described inductive current error is handled through inductive current control ring governing loop, obtains the inverter controlled quentity controlled variable;
6) with described inverter controlled quentity controlled variable the main circuit of inverter is controlled.
In described inductive current reference quantity, when the subtraction link deducts the inductor current feedback amount, add the output current feedback quantity, obtain the inductive current error through the addition link.
For implementing the custom-designed control device of control method of inverter, comprise inverter by the first subtraction parts, voltage control loop is regulated parts, the second subtraction parts, the inductive current control ring is regulated the control device that parts connect to form successively, the first subtraction parts, the second subtraction parts are connected with the main circuit of inverter respectively, between the voltage control loop adjusting parts and the second subtraction parts, adding unit is set, nonlinear Control mechanism is set, two inputs of nonlinear Control mechanism regulate between the parts with the first subtraction parts and voltage control loop respectively and the main circuit of inverter is connected, and output is connected with adding unit.
The described second subtraction parts are replaced to the addition and subtraction compound component, and the addition input that the addition and subtraction compound component increases is connected with the main circuit of inverter.Described nonlinear Control mechanism is regulated by error that parts, multiplying unit, absolute value transform component, output current are regulated parts and the amplitude limit control assembly that is provided with connects to form successively between multiplying unit and adding unit.
Main characteristics of the present invention is: because the controlled quentity controlled variable of nonlinear Control link equals the product of load current and voltage error, so under linear loading condition, electric current is very little, and voltage error is also very little simultaneously, and this controlled quentity controlled variable can be ignored the influence of inductive current reference quantity.So the existence of nonlinear Control link can't influence the work of inverter under linear load.But under the nonlinear load condition, for example for the instantaneous mutation load, because electric voltage dropping causes voltage error signal to increase suddenly, it is big that the controlled quentity controlled variable of nonlinear Control link also correspondingly becomes, thereby increased the inductive current reference quantity, be equivalent to the gain that has increased the inductive current control ring, improved the control bandwidth of inverter, so can improve the dynamic property of inverter.Under periodic nonlinear load such as rectified load condition, output current is the pulse current form, electric current is compared much bigger with the electric current under the linear load situation, so it is big that the controlled quentity controlled variable of nonlinear Control link also becomes accordingly, thereby increase the inductive current reference quantity, be equivalent to the gain that has increased the inductive current control ring, can improve the steady-state behaviour of inverter accordingly, reduce the distortion of inverter output waveform.
Another characteristics of the present invention are that voltage control loop governing loop and the inductive current control ring governing loop in the described control method can adopt different control methods to realize, for example voltage control loop, inductive current control ring, error adjuster and output current governing loop can adopt PID control, therefore internal model control, Based Intelligent Control etc., the described control method scope that can be widely used.
Description of drawings
Fig. 1 is the schematic diagram of inverter control method principle of the present invention and control device structure;
Fig. 2 is the principle schematic of another embodiment of inverter control method of the present invention and control device structure.
Fig. 3 is the schematic diagram of an inverter;
Fig. 4 is the principle schematic of existing inverter control method;
Embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, its control method is as follows:
Deduct the feedback voltage V of output voltage by the default voltage reference value Vr of the first subtraction link, 6 usefulness
Of, obtain voltage error e;
7 couples of described voltage error e handle by the voltage control loop governing loop, generate basic inductive current reference quantity I
Lr1
On the other hand, the 16 couples of described voltage error e of error governing loop by nonlinear Control link 11 handle the variable e of formation voltage error
1 Error governing loop 16 can be a PID controlling unit, also can be other controlling units, and such as adopting the ratio governing loop, this moment, its expression formula was:
e
1＝k
1×e
k
1It is a predefined constant.
Output current governing loop 12 can be a PID control, also can be other controlling units, and it is to the feedback current I of described output current
OfHandle, generate electric current I
O1Use 13 pairs of described electric current I of absolute value transform part again
O1Handle, obtain electric current I
O2Then by the variable e of 14 pairs of described voltage errors of multiplication link
1With described electric current I
O2Carry out multiplying, obtain product C
1Again by 15 couples of described product C of amplitude limit controlling unit
1Handle, obtain the output variable C of nonlinear Control link 11
n
By the described basic inductive current reference quantity I of addition link 10 usefulness
LrlAdd the output variable C of nonlinear Control link 11
n, obtain inductive current reference quantity I
Lr
By the described inductive current reference quantity of the second subtraction link, 8 usefulness I
LrDeduct the feedback current I of inductive current
Lf, obtain inductive current error e i;
9 couples of described inductive current error e i handle by inductive current control ring governing loop, generate inverter control signal V
c
Just can control converter main circuit with inverter control signal Vc according to the inverter control method of routine.
Another example of the present invention as shown in Figure 2, it is a kind of extend type of Fig. 1.As can be seen, it has introduced the feedback current I of output current on the basis of Fig. 1 from the comparison of Fig. 2 and Fig. 1
OfConcrete improvement is as follows, replaces the second subtraction link 8 with addition and subtraction link 17, by the feedback current I of addition and subtraction link 17 with output current
OfWith inductive current reference quantity I
LrAddition deducts the feedback current I of inductive current again
Lf, obtain inductive current error e i.Other steps are identical with Fig. 1.
Inverter is made of main circuit 1, control device 5, and main circuit is made up of driver element 2, detecting unit 3, power cell 4.
Claims (5)
1, a kind of control method of inverter:
1) in default voltage reference value, deducts the feedback quantity of output voltage, obtain voltage error through the subtraction link;
2) described voltage error is handled through the voltage control loop governing loop, generates basic inductive current reference quantity;
3) in basic inductive current reference quantity, add the output variable that generates by the nonlinear Control link through the addition link, obtain the inductive current reference quantity as the circuit controlled quentity controlled variable, described output variable is by the error governing loop of nonlinear Control link described voltage error to be handled, the variable of formation voltage error, output current governing loop and absolute value transform part through the nonlinear Control link are handled successively to the feedback quantity of output current, the feedback quantity of the output current after handling and the variable of voltage error are carried out multiplying through the multiplication link, the product output variable that obtains obtains after the amplitude limit controlling unit is handled;
4) in described inductive current reference quantity, deduct the inductor current feedback amount, obtain the inductive current error through the subtraction link;
5) described inductive current error is handled through inductive current control ring governing loop, obtains the inverter controlled quentity controlled variable;
6) with described inverter controlled quentity controlled variable the main circuit of inverter is controlled.
2, the control method of inverter according to claim 1 is characterized in that: when the subtraction link deducts the inductor current feedback amount, add the output current feedback quantity through the addition link in described inductive current reference quantity, obtain the inductive current error.
3, for implementing the custom-designed control device of claim 1, comprise inverter by the first subtraction parts (6), voltage control loop is regulated parts (7), the second subtraction parts (8), the inductive current control ring is regulated the control device that parts (9) connect to form successively, the first subtraction parts (6), the second subtraction parts (8) are connected with the main circuit (1) of inverter respectively, it is characterized in that: regulate between the parts (7) and the second subtraction parts (8) that at voltage control loop adding unit (10) being set, nonlinear Control mechanism (11) is set, two inputs of nonlinear Control mechanism regulate between the parts (7) with the first subtraction parts (6) and voltage control loop respectively and the main circuit (1) of inverter is connected, and output is connected with adding unit (10).
4, control device according to claim 4 is characterized in that: the described second subtraction parts (8) are replaced to addition and subtraction compound component (17), and the addition input that the addition and subtraction compound component increases is connected with the main circuit (1) of inverter.
5. control device according to claim 4 is characterized in that: described nonlinear Control mechanism (11) regulates parts (16), multiplying unit (14), absolute value transform component (13), output current by error to regulate the amplitude limit control assembly (15) of parts (12) and setting between multiplying unit (14) and adding unit (10) and connect to form successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100622439A CN100521491C (en) | 2005-12-27 | 2005-12-27 | Inverter control method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100622439A CN100521491C (en) | 2005-12-27 | 2005-12-27 | Inverter control method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808876A CN1808876A (en) | 2006-07-26 |
| CN100521491C true CN100521491C (en) | 2009-07-29 |
Family
ID=36840620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100622439A Active CN100521491C (en) | 2005-12-27 | 2005-12-27 | Inverter control method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100521491C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780387B (en) * | 2012-07-25 | 2014-10-08 | 浙江大学 | Control method of inverter |
-
2005
- 2005-12-27 CN CNB2005100622439A patent/CN100521491C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN1808876A (en) | 2006-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103887972B (en) | Mixed control circuit of DVS system switch DC-DC converter and control method of mixed control circuit of DVS system switch DC-DC converter | |
| CN103051186B (en) | Fast transient response digital switch converter and control method of fast transient response digital switch converter | |
| CN101702574A (en) | Power factor correcting controller and control method and applied power supply converter thereof | |
| CN105811780B (en) | A kind of output voltage constant pressure control method of primary side feedback inverse excitation type converter | |
| CN202737746U (en) | Improved single cycle control full bridge converter | |
| CN108574410B (en) | Realize the circuit and method of self-adaptable slop compensation quick high accuracy | |
| CN102223077B (en) | Sliding-mode controller of LLC (logic link control) series resonance DC-DC converter and control method thereof | |
| CN101051790A (en) | Single chip high frequency DC-DC converter | |
| CN107104593A (en) | The shared integral term PID double-closed-loop control devices of PWM count word power supply | |
| CN102403901A (en) | Controllers for power converters and control method | |
| CN102832814A (en) | Method for controlling hysteresis with voltage feedforward quickly | |
| CN110190753A (en) | A kind of DC converter state feedback model forecast Control Algorithm | |
| CN100521491C (en) | Inverter control method and apparatus | |
| CN105553255A (en) | Constant on-time variable-frequency control method for switched-capacitor converter | |
| CN101969274B (en) | Bus voltage stabilization control device | |
| CN110445387A (en) | A kind of topological structure and control method of forming and capacity dividing power supply | |
| CN2854924Y (en) | Control device of inverter | |
| CN109861565B (en) | Model reference self-adaptive control method of two-stage AC/DC converter | |
| CN102158085B (en) | Digital automatic frequency-selecting direct current converter | |
| CN110912128A (en) | Internal model decoupling control method of multi-terminal flexible direct current power transmission system | |
| CN102545610B (en) | Digital method and system for sliding mode variable structure control of DC-DC switch converter | |
| CN108631624A (en) | A kind of Cascade H bridge rectifier and its control method based on three-dimensional modulation | |
| CN115473434A (en) | Pulse capacitor charging power supply powered by storage battery and control method thereof | |
| CN114552739A (en) | Intelligent control method and device for hybrid energy storage system | |
| Wang et al. | Improved linear sliding mode controller of buck converters through adding terminal sliding mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20060726 Assignee: ZHEJIANG LEIPEIDE TECHNOLOGY LIMITED COMPANY Assignor: Zhejiang University Contract record no.: 2013330000367 Denomination of invention: Inverter control method and apparatus Granted publication date: 20090729 License type: Exclusive License Record date: 20131211 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |