CN103986458A - Micro-grid single-phase grid-connection phase-locked loop control method based on repetition control - Google Patents
Micro-grid single-phase grid-connection phase-locked loop control method based on repetition control Download PDFInfo
- Publication number
- CN103986458A CN103986458A CN201410152302.0A CN201410152302A CN103986458A CN 103986458 A CN103986458 A CN 103986458A CN 201410152302 A CN201410152302 A CN 201410152302A CN 103986458 A CN103986458 A CN 103986458A
- Authority
- CN
- China
- Prior art keywords
- phase
- grid
- micro
- locked loop
- quadrature
- 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.)
- Granted
Links
Landscapes
- Transmitters (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention relates to a micro-grid single-phase grid-connection phase-locked loop control method based on repetition control. The method comprises the steps of collecting single-phase network voltage signals ug, establishing an orthogonal coordinate system by adopting a secondary generalized integrator, and establishing a micro-grid single-phase grid-connection phase-locked loop based on the repetition control according to a modified instantaneous reactive power theory. The micro-grid single-phase grid-connection phase-locked loop control method based on the repetition control has the advantages that the tracking precision of a system can be improved greatly after the repetition control of several periods, and the quality of the system is improved. The method is suitable for tracking periodic input signals, can also restrain periodic interference, the micro-grid single-phase grid-connection phase-locked loop control method based on the repetition control is established according to the modified instantaneous reactive power theory, the problems that the phase-locked loop is delayed and is poor in dynamic performance are solved, the control performance of the system is further improved, the robustness of the system is enhanced, and the phase locking precision is improved.
Description
Technical field
The invention belongs to micro-electric power network technique field, relate to a kind of single-phase grid-connected phase locking loop controlling method of micro-electrical network based on repeating to control.
Background technology
Phase-locked loop (Phase-Locked Loop, abbreviation PLL) technology refers to the closed-loop control system of energy automatic tracing frequency input signal and phase place, be widely used in mains frequency adjustment, Automation of Electric Systems, Radar Technology and some other high-tech sector, in photovoltaic generating system, it has a very important role equally.
In parallel network reverse controlling unit, the direct current energy that photovoltaic array produces is converted to AC energy, with the grid-connected condition that needs to meet grid-connected current and the same frequency of line voltage homophase of electrical network, therefore, adopts poor being absolutely necessary of PHASE-LOCKED LOOP PLL TECHNIQUE control phase.
The realization of PLL can adopt hardware mode or software mode.Hardware mode comprises analog phase-locked look, digital phase-locked loop and mixing phase-locked loop, and their hardware circuit is comparatively complicated, is the usual way of early stage Phase Lock Technique.Along with the development of electronics technology, software Phase-Lock (SPLL) is more and more paid attention to.Conventional software phase-lock-loop algorithm has two kinds: a kind of mode based on crossing zero balancing, and a kind of based on Instantaneous Power Theory.The former can only detect two zero crossings of voltage in a power frequency period, thereby has limited the speed of phase-locked loop, and when fluctuation and distortion occur line voltage, can accurately not capture zero crossing, thereby affect phase-locked precision; The latter is because software phlase locking is simple in structure, rapid dynamic response speed and being widely used, however there is larger time delay in this algorithm, thus affect phase-locked precision.
Summary of the invention
Technical problem to be solved by this invention is to provide and a kind ofly reduces phase-locked delay and strengthen its dynamic property and can improve the single-phase grid-connected phase locking loop controlling method of micro-electrical network based on repeating to control of phase-locked precision.
For solving the problems of the technologies described above adopted technical scheme, be: a kind of single-phase grid-connected phase locking loop controlling method of micro-electrical network based on repeating to control, comprises the steps:
Step 1 gathers single-phase mains voltage signal
;
Step 2 adopts the method for secondary improper integral device to set up orthogonal coordinate system, described single-phase mains voltage signal
through second order improper integral device, obtain two quadrature voltage components
with
, its expression formula is
；
；
Step 3 is set up the single-phase grid-connected phase-locked loop of micro-electrical network of controlling based on repeating according to improved Instantaneous Power Theory; The described single-phase grid-connected phase-locked loop of micro-electrical network based on repeating to control has saved original p-q transform part, and it directly adopts instantaneous active power P ＇ to realize phase-locked control as specified rate; It comprises repetitive controller, integrator
, remainder ring of numbers joint Mod, the leading 90 ° of links of phase place, first get sin function link 1-sin, second and get sin function link 2-sin, the second to the 3rd multiplier and low pass filter;
(1) described instantaneous active power
the variation power that the difference by input voltage phase and phase-locked output phase causes, output angle frequency after it and set-point 0 regulate by described repetitive controller
;
(2) described angular frequency
with reference frequency
after addition, obtain the angular frequency of virtual current
, the angular frequency of itself and line voltage meets following relation
；
Wherein,
angular frequency for line voltage;
get work frequency 50Hz;
(3) angular frequency of described virtual current on the one hand,
through described integrator, remainder ring of numbers joint Mod, obtain the phase theta of virtual current successively; On the other hand, the angular frequency of described virtual current
with set-point
product after described the 3rd multiplier after described low pass filter, obtains the frequency of line voltage again
f;
(4) phase theta of described virtual current after the leading 90 ° of links of described phase place, obtain the phase theta of line voltage ';
(5) phase theta of described virtual current and set-point
do after add operation and get after sin function link 2-sin through described second, obtain quadrature current component
;
(6) phase theta of described virtual current obtains quadrature current component after first gets sin function link 1-sin
;
(7) by described quadrature current component
with quadrature voltage component
input respectively after described the first multiplier, obtain α axle real component P
α;
(8) by described quadrature current component
with quadrature voltage component
input respectively after described the second multiplier, obtain β axle real component P
β;
(9) through described α axle real component P
αwith β axle real component P
βcarry out add operation, obtain instantaneous active power P ＇; The expression formula of described instantaneous active power P ＇ is
；
Wherein,
,
two quadrature current components of constructing by phase shift, and
lag behind
phase place be 90 °;
(10) input instantaneous active power P ＇ obtaining being fed back to based on repeating the single-phase grid-connected phase-locked loop of micro-electrical network of control compares with set-point 0 again, and repeats the process of (1) in described step 3 ~ (9).
Described repetitive controller comprises signal generator, cycle delay link and compensator; The transfer function of described repetitive controller is
；
Described signal generator is
; Described cycle delay link is
; Described compensator is
.
The invention has the beneficial effects as follows: through the tracking accuracy that control can improve system afterwards greatly that repeats in several cycles, improve system quality; The present invention is not only applicable to tracking cycle input signal, can suppress PERIODIC INTERFERENCE yet; According to improved Instantaneous Power Theory, set up the single-phase grid-connected phase locking loop controlling method of micro-electrical network of controlling based on repeating, not only improved the not good problem of phase-locked delay and dynamic property, also promote the control performance of system, and strengthened system robustness, improved phase-locked precision.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
According to Fig. 1 and the present embodiment, be described as follows.
The present embodiment comprises the steps:
First step 1 gathers single-phase mains voltage signal by instrument transformer
,
, wherein
it is unknown quantity;
Step 2 adopts the method for second order improper integral device to set up orthogonal coordinate system, described single-phase mains voltage signal
through second order improper integral device, obtain two quadrature voltage components
with
, its expression formula is
；
；
Sampling is obtained
adopt the mode of second order improper integral to be configured to two-phase quadrature component to single-phase input.According to the transfer function of second order improper integral device, obtaining two quadrature components is
，
；
By two quadrature voltage components of structure
with
as input, introduce in the single-phase grid-connected phase-locked loop control algolithm of micro-electrical network based on repeating to control, what by the method, finally obtain is electric network voltage phase angle
be required phase angle.
Step 3 is set up the single-phase grid-connected phase-locked loop of micro-electrical network of controlling based on repeating according to improved Instantaneous Power Theory; The described single-phase grid-connected phase-locked loop of micro-electrical network based on repeating to control has saved original p-q transform part, and it directly adopts instantaneous active power P ＇ to realize phase-locked control as specified rate; It comprises repetitive controller, integrator
, remainder ring of numbers joint Mod, the leading 90 ° of links of phase place, first get sin function link 1-sin, second and get sin function link 2-sin, the second to the 3rd multiplier and low pass filter;
(1) described instantaneous active power
the variation power that the difference by input voltage phase and phase-locked output phase causes, output angle frequency after it and set-point 0 regulate by described repetitive controller
;
(2) described angular frequency
with reference frequency
after addition, obtain the angular frequency of virtual current
, the angular frequency of itself and line voltage meets following relation
；
Wherein,
angular frequency for line voltage;
get work frequency 50Hz;
(3) angular frequency of described virtual current on the one hand,
through described integrator, remainder ring of numbers joint Mod, obtain the phase theta of virtual current successively; On the other hand, the angular frequency of described virtual current
with set-point
product after described the 3rd multiplier after described low pass filter, obtains the frequency of line voltage again
f;
(4) phase theta of described virtual current after the leading 90 ° of links of described phase place, obtain the phase theta of line voltage ';
(5) phase theta of described virtual current and set-point
do after add operation and get after sin function link 2-sin through described second, obtain quadrature current component
;
(6) phase theta of described virtual current obtains quadrature current component after first gets sin function link 1-sin
;
(7) by described quadrature current component
with quadrature voltage component
input respectively after described the first multiplier, obtain α axle real component P
α;
(8) by described quadrature current component
with quadrature voltage component
input respectively after described the second multiplier, obtain β axle real component P
β;
(9) through described α axle real component P
αwith β axle real component P
βcarry out add operation, obtain instantaneous active power P ＇; The expression formula of described instantaneous active power P ＇ is
；
Wherein,
,
two quadrature current components of constructing by phase shift, and
lag behind
phase place be 90 °;
(10) input instantaneous active power P ＇ obtaining being fed back to based on repeating the single-phase grid-connected phase-locked loop of micro-electrical network of control compares with set-point 0 again, and repeats the process of (1) ~ (9) in described step 3.
Described repetitive controller comprises signal generator, cycle delay link and compensator; The transfer function of described repetitive controller is
；
Described signal generator is
; Described cycle delay link is
; Described compensator is
.
Through the tracking accuracy that control can improve system afterwards greatly that repeats in several cycles, improve system quality; The present invention is not only applicable to tracking cycle input signal, can suppress PERIODIC INTERFERENCE yet; According to improved Instantaneous Power Theory, set up the single-phase grid-connected phase locking loop controlling method of micro-electrical network of controlling based on repeating, not only improved the not good problem of phase-locked delay and dynamic property, also promote the control performance of system, and strengthened system robustness, improved phase-locked precision.
Claims (2)
1. the single-phase grid-connected phase locking loop controlling method of micro-electrical network based on repeating to control, is characterized in that comprising the steps:
Step 1 gathers single-phase mains voltage signal
;
Step 2 adopts the method for secondary improper integral device to set up orthogonal coordinate system, described single-phase mains voltage signal
through second order improper integral device, obtain two quadrature voltage components
with
, its expression formula is
；
；
Step 3 is set up the single-phase grid-connected phase-locked loop of micro-electrical network of controlling based on repeating according to improved Instantaneous Power Theory; The described single-phase grid-connected phase-locked loop of micro-electrical network based on repeating to control has saved original p-q transform part, and it directly adopts instantaneous active power P ＇ to realize phase-locked control as specified rate; It comprises repetitive controller, integrator
, remainder ring of numbers joint Mod, the leading 90 ° of links of phase place, first get sin function link 1-sin, second and get sin function link 2-sin, the second to the 3rd multiplier and low pass filter;
(1) described instantaneous active power
the variation power that the difference by input voltage phase and phase-locked output phase causes, output angle frequency after it and set-point 0 regulate by described repetitive controller
;
(2) described angular frequency
with reference frequency
after addition, obtain the angular frequency of virtual current
, the angular frequency of itself and line voltage meets following relation
；
Wherein,
angular frequency for line voltage;
get work frequency 50Hz;
(3) angular frequency of described virtual current on the one hand,
through described integrator, remainder ring of numbers joint Mod, obtain the phase theta of virtual current successively; On the other hand, the angular frequency of described virtual current
with set-point
product after described the 3rd multiplier after described low pass filter, obtains the frequency of line voltage again
f;
(4) phase theta of described virtual current after the leading 90 ° of links of described phase place, obtain the phase theta of line voltage ';
(5) phase theta of described virtual current and set-point
do after add operation and through described second, get sin function link
After 2-sin, obtain quadrature current component
;
(6) phase theta of described virtual current obtains quadrature current component after first gets sin function link 1-sin
;
(7) by described quadrature current component
with quadrature voltage component
input respectively after described the first multiplier, obtain α axle real component P
α ;
(8) by described quadrature current component
with quadrature voltage component
input respectively after described the second multiplier, obtain β axle real component P
β ;
(9) through described α axle real component P
α with β axle real component P
β carry out add operation, obtain instantaneous active power P ＇; The expression formula of described instantaneous active power P ＇ is
；
Wherein,
,
two quadrature current components of constructing by phase shift, and
lag behind
phase place be 90 °;
(10) input instantaneous active power P ＇ obtaining being fed back to based on repeating the single-phase grid-connected phase-locked loop of micro-electrical network of control compares with set-point 0 again, and repeats the process of (1) ~ (9) in described step 3.
2. a kind of single-phase grid-connected phase locking loop controlling method of micro-electrical network based on repeating to control according to claim 1, is characterized in that described repetitive controller comprises signal generator, cycle delay link and compensator;
The transfer function of described repetitive controller is
；
Described signal generator is
; Described cycle delay link is
; Described compensator is
.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410152302.0A CN103986458B (en) | 2014-04-16 | 2014-04-16 | A kind of single-phase grid-connected phase locking loop controlling method of the micro-capacitance sensor based on Repetitive controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410152302.0A CN103986458B (en) | 2014-04-16 | 2014-04-16 | A kind of single-phase grid-connected phase locking loop controlling method of the micro-capacitance sensor based on Repetitive controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103986458A true CN103986458A (en) | 2014-08-13 |
| CN103986458B CN103986458B (en) | 2017-03-08 |
Family
ID=51278298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410152302.0A Active CN103986458B (en) | 2014-04-16 | 2014-04-16 | A kind of single-phase grid-connected phase locking loop controlling method of the micro-capacitance sensor based on Repetitive controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103986458B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004926A (en) * | 2015-07-27 | 2015-10-28 | 华中科技大学 | Alternating current phase frequency amplitude tracking and reconstruction method |
| CN105158597A (en) * | 2015-08-05 | 2015-12-16 | 西南交通大学 | Method for improving power grid voltage phase monitoring dynamic performance of single-phase digital phase-locked loop |
| CN106911329A (en) * | 2017-02-23 | 2017-06-30 | 国网江西省电力公司电力科学研究院 | A kind of single-phase phase-locked loop based on FPGA |
| CN111082804A (en) * | 2019-12-17 | 2020-04-28 | 中国石油大学(华东) | Frequency compensation type digital phase-locked loop implementation method |
| CN113589056A (en) * | 2021-07-30 | 2021-11-02 | 燕山大学 | Phase locking method for single-phase 2-frequency multiplication power grid with multiplication structure and special trigonometric function |
| CN114826426A (en) * | 2022-06-24 | 2022-07-29 | 国科大杭州高等研究院 | Parameter-adaptive high-precision digital laser phase locking system and method |
| CN116316728A (en) * | 2023-03-14 | 2023-06-23 | 上海正泰电源***有限公司 | Automatic off-grid-to-grid phase tracking method based on bilateral phase locking |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090121794A1 (en) * | 2007-11-13 | 2009-05-14 | Harris Corporation | Phase lock control system for a voltage controlled oscillator |
| CN102545889A (en) * | 2011-12-19 | 2012-07-04 | 西安赛博电气有限责任公司 | Closed-loop phase locking method based on instantaneous reactive power theory and phase locking device |
| CN102904568A (en) * | 2012-09-26 | 2013-01-30 | 西安奥特迅电力电子技术有限公司 | Self-adaptive grid-tied converter single phase soft phase-locked loop |
| CN103647470A (en) * | 2013-12-09 | 2014-03-19 | 江苏大学 | Three-phase NPC grid-connected inverter based on repeated control |
-
2014
- 2014-04-16 CN CN201410152302.0A patent/CN103986458B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090121794A1 (en) * | 2007-11-13 | 2009-05-14 | Harris Corporation | Phase lock control system for a voltage controlled oscillator |
| CN102545889A (en) * | 2011-12-19 | 2012-07-04 | 西安赛博电气有限责任公司 | Closed-loop phase locking method based on instantaneous reactive power theory and phase locking device |
| CN102904568A (en) * | 2012-09-26 | 2013-01-30 | 西安奥特迅电力电子技术有限公司 | Self-adaptive grid-tied converter single phase soft phase-locked loop |
| CN103647470A (en) * | 2013-12-09 | 2014-03-19 | 江苏大学 | Three-phase NPC grid-connected inverter based on repeated control |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004926A (en) * | 2015-07-27 | 2015-10-28 | 华中科技大学 | Alternating current phase frequency amplitude tracking and reconstruction method |
| CN105004926B (en) * | 2015-07-27 | 2018-01-26 | 华中科技大学 | A kind of method of alternating current phases frequency amplitude tracking reconstruct |
| CN105158597A (en) * | 2015-08-05 | 2015-12-16 | 西南交通大学 | Method for improving power grid voltage phase monitoring dynamic performance of single-phase digital phase-locked loop |
| CN106911329A (en) * | 2017-02-23 | 2017-06-30 | 国网江西省电力公司电力科学研究院 | A kind of single-phase phase-locked loop based on FPGA |
| CN111082804A (en) * | 2019-12-17 | 2020-04-28 | 中国石油大学(华东) | Frequency compensation type digital phase-locked loop implementation method |
| CN111082804B (en) * | 2019-12-17 | 2023-05-26 | 中国石油大学(华东) | Method for realizing frequency compensation type digital phase-locked loop |
| CN113589056A (en) * | 2021-07-30 | 2021-11-02 | 燕山大学 | Phase locking method for single-phase 2-frequency multiplication power grid with multiplication structure and special trigonometric function |
| CN113589056B (en) * | 2021-07-30 | 2022-05-10 | 燕山大学 | Single-phase 2-frequency-multiplication power grid phase locking method with multiplication structure and special trigonometric function |
| CN114826426A (en) * | 2022-06-24 | 2022-07-29 | 国科大杭州高等研究院 | Parameter-adaptive high-precision digital laser phase locking system and method |
| CN116316728A (en) * | 2023-03-14 | 2023-06-23 | 上海正泰电源***有限公司 | Automatic off-grid-to-grid phase tracking method based on bilateral phase locking |
| CN116316728B (en) * | 2023-03-14 | 2024-03-29 | 上海正泰电源***有限公司 | Automatic off-grid-to-grid phase tracking method based on bilateral phase locking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103986458B (en) | 2017-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103986458A (en) | Micro-grid single-phase grid-connection phase-locked loop control method based on repetition control | |
| CN102611138B (en) | Delay-free single-phase photovoltaic synchronization power adjusting method | |
| CN104578172B (en) | A kind of photovoltaic inversion regulator control method with linear FLL | |
| CN107623522B (en) | Method for controlling bi-second order generalized integral phase-locked loop based on d-q transformation | |
| CN102904568B (en) | Self-adaptive grid-tied converter single phase soft phase-locked loop | |
| CN103267897B (en) | Three-phase-locked loop based on reversed Park conversion | |
| WO2019228054A1 (en) | Phase locking device and phase locking method | |
| CN110165706B (en) | Self-adaptive three-phase grid-connected converter phase-locked loop and phase-locked control method thereof | |
| CN206259920U (en) | One kind is based on double Second Order Generalized Integrator phaselocked loops | |
| CN109818370B (en) | Second-order generalized integral frequency-locked loop control method with advanced correction | |
| CN105633986B (en) | The grid-connection converter transient state control method oriented based on dynamic synchronization signal | |
| CN109193794A (en) | A kind of Grid-connected Control Strategy of low-voltage direct micro-capacitance sensor | |
| CN112532025B (en) | Method for optimizing Vienna rectifier input current when power grid is disturbed | |
| CN111082804A (en) | Frequency compensation type digital phase-locked loop implementation method | |
| CN108631305A (en) | A kind of three-phase power grid voltage suitable for complex electric network operating mode tracks phase-lock technique | |
| CN102998527A (en) | Pass band type fundamental wave, harmonic wave and direct current component detection method | |
| CN103472302A (en) | Method for using one-phase photovoltaic grid-connected inverter to detect network voltage phase | |
| CN105429159A (en) | Novel phase locking method | |
| CN111555752A (en) | Single-phase frequency self-adaptive phase-locked loop | |
| CN104410407A (en) | Adaptive digital phase-locked loop and phase locking method | |
| CN113014250B (en) | Phase-locked loop capable of eliminating DC offset voltage and phase-locked control method thereof | |
| CN111431210B (en) | Phase-locked loop control method and system of three-phase grid-connected converter | |
| CN108988384A (en) | Grid-connected current DC component suppressing method based on fractional order PIR | |
| CN105158597A (en) | Method for improving power grid voltage phase monitoring dynamic performance of single-phase digital phase-locked loop | |
| CN109638877B (en) | Phase-locked loop control method for synchronization of grid-connected converter and power grid signals |
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 |