CN107528479B - A kind of variable-frequency power sources output negative voltage control method and system - Google Patents
A kind of variable-frequency power sources output negative voltage control method and system Download PDFInfo
- Publication number
- CN107528479B CN107528479B CN201710708379.5A CN201710708379A CN107528479B CN 107528479 B CN107528479 B CN 107528479B CN 201710708379 A CN201710708379 A CN 201710708379A CN 107528479 B CN107528479 B CN 107528479B
- Authority
- CN
- China
- Prior art keywords
- axis component
- direct
- deviation
- voltage
- negative sequence
- 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
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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of variable-frequency power sources to export negative voltage control method and system, and method is in the output of former variable-frequency power sources output voltage control ring and to connect negative voltage control ring.The variable-frequency power sources output voltage signal of sampling is subjected to positive-negative sequence decomposition in negative voltage control ring, obtain the quadrature axis component and direct-axis component of negative sequence voltage, then the quadrature axis component and direct-axis component of aforementioned practical negative sequence voltage are individually subtracted from the given value of negative sequence voltage quadrature axis component and direct-axis component, and difference is sent into deviation controller, after Park inverse transformation, obtain the output valve of negative voltage control ring, finally the output valve of negative voltage control ring is added in the output valve of former variable-frequency power sources output voltage control ring, and then the control to variable-frequency power sources output voltage is realized by pulsewidth modulation.The present invention is increased inhibition of the negative voltage control ring realization to negative sequence voltage, is not influenced the stability of original control ring using the negative sequence component of variable-frequency power sources output voltage as control target, simple easily to realize.
Description
Technical field
The present invention relates to power electronics control technology field, especially a kind of frequency conversion that can be applied to bank electricity variable-frequency power sources etc.
Power supply exports negative voltage control method and system
Background technique
Variable-frequency power sources is that AC-DC-exchange-filtering converter plant is made of entire circuit, is widely applied.
Variable-frequency power sources can not only simulation output country variant power grid index, and for exporting electrical manufacturer design and develop, produce,
The sine-wave power output of pure reliable, voltage and frequency is provided in the application such as detection.Become
Frequency power can be applied to bank electricity access system, will be converted to 60HZ power supply by 50HZ power supply on the bank.Bank electricity variable-frequency power sources, it is also known as electric
Sub- state type shore electric power, high temperature, high humidity, highly corrosive, the big load impacts such as it is specific on ship, bank harbour etc. are disliked
Bad use environment and the high power frequency conversion power supply equipment for being specifically designed manufacture.
Bank electricity variable-frequency power sources is ship load supplying, and high to the quality requirement of voltage, the power quality difference of power supply can be led
Ship load operation irregularity is caused, or even burns ship electrical equipment.Ship Electrical Power System is also wrapped there are the load of numerous types
Containing single-phase load, leading to load, there are asymmetry, if any inhibition is above not added in control in variable-frequency power sources, it will cause to export
Voltage is asymmetric, i.e., there are negative sequence components, negative sequence component voltage can further deteriorate the operating condition of ship load for voltage.Therefore, it needs
Negative sequence voltage is inhibited, the power quality to guarantee ship electricity consumption is good.
Summary of the invention
It is an object of the present invention to provide a kind of variable-frequency power sources negative voltage control method and systems, are exported with variable-frequency power sources
The negative sequence component of voltage realizes the inhibition to negative sequence voltage as control target, by negative voltage control ring, to improve change
The power quality of frequency power.
The technical scheme adopted by the invention is as follows: a kind of variable-frequency power sources output negative voltage control method, comprising:
S1 samples the real-time output voltage signal of variable-frequency power sources, and the voltage signal obtained to sampling decomposes,
Obtain the quadrature axis component U of negative sequence voltage in output voltage under rotating coordinate systemq_NWith direct-axis component Ud_N；
S2 sets the quadrature axis component and direct-axis component of negative sequence voltage given value, by the quadrature axis component of negative sequence voltage given value
And direct-axis component, respectively with the quadrature axis component U of the obtained negative sequence voltage of step S1q_NWith direct-axis component Ud_NAdditive operation is carried out,
Obtain the quadrature axis component deviation and direct-axis component deviation of negative sequence voltage；
S3 carries out deviation tune to the quadrature axis component deviation and direct-axis component deviation of the obtained negative sequence voltage of step S2 respectively
Section, the negative sequence voltage quadrature axis component deviation v after obtaining bias adjustmentq N*With direct-axis component deviation vd N*；
S4, to the quadrature axis component deviation v of the obtained negative sequence voltage of step S3q N*With direct-axis component deviation vd N*, carry out respectively
Park inverse transformation obtains the negative sequence voltage quadrature axis component deviation u under rest frameβN_refWith direct-axis component deviation uαN_ref；
S5 sets the quadrature axis component given value u of variable-frequency power sources target voltageq_refWith direct-axis component given value ud_ref, warp
Park inverse transformation obtains quadrature axis component given value and direct-axis component given value under rest frame；
S6, the negative sequence voltage quadrature axis component deviation u under the rest frame that S3 is obtainedβN_refWith direct-axis component deviation
uαN_ref, quadrature axis component given value and direct-axis component given value under the rest frame obtained with S4 respectively correspond superposition, fold
Input signal of the signal as pulse width modulation algorithm after adding；
S7, using the on off operating mode of each controllable switch in pulse width modulation algorithm control variable-frequency power sources, to the defeated of variable-frequency power sources
Voltage is controlled out.
The step S7 of the method for the present invention is the prior art, and the present invention is directed to pulsewidth modulation is added in the influence of negative sequence voltage to calculate
In the input of method, so that system takes into account the control of variable-frequency power sources the influence of negative sequence voltage, and then the suppression of negative sequence voltage is realized
Production is used.
Preferably, in step S2, the quadrature axis component and direct-axis component of negative sequence voltage given value are respectively set as 0.It can be used for
It is when exporting pure sequence voltage that variable-frequency power sources, which controls target,.
Preferably, in step S3, using pi regulator to the quadrature axis component deviation of negative sequence voltage and direct-axis component deviation into
Row bias adjustment.
Preferably, in step S3, using PID regulator to the quadrature axis component deviation of negative sequence voltage and direct-axis component deviation into
Row bias adjustment.
Preferably, the angle of the Park inverse transformation in step S4 is opposite with the angular phase of Park inverse transformation in step S5.
I.e. negative phase-sequence ring is opposite with the coordinate transform angle of positive sequence ring.
Invention additionally discloses a kind of variable-frequency power sources to export negative voltage control system, in which:
Variable-frequency power sources includes control ring and pulse width modulation module, and control ring includes the first Park inverse transform block, and first
The quadrature axis component given value and direct-axis component given value of the input terminal access variable-frequency power sources output voltage of Park inverse transform block, the
The output end of one Park inverse transform block exports quadrature axis component given value and direct-axis component given value under rest frame respectively；
It further include negative voltage control ring, negative voltage control ring is defeated including the 2nd Park inverse transform block, quadrature axis component
Enter branch and direct-axis component input branch；Quadrature axis component branch and direct-axis component branch road are respectively equipped with comparison operation module and partially
Poor control module；
In quadrature axis component branch, the friendship of negative sequence voltage in the input terminal input variable-frequency power sources output voltage of comparison operation module
The quadrature axis component given value of axis component and negative sequence voltage, comparison operation module compare the deviation of two input values, and by comparison result
To deviation controller, the output end of deviation controller connects the input terminal of the 2nd Park inverse transform block for output；
In direct-axis component branch, negative sequence voltage is straight in the input terminal input variable-frequency power sources output voltage of comparison operation module
The direct-axis component given value of axis component and negative sequence voltage, comparison operation module compare the deviation of two input values, and by comparison result
To deviation controller, the output end of deviation controller connects the input terminal of the 2nd Park inverse transform block for output；
2nd Park inverse transform block carries out Park contravariant to the quadrature axis component deviation and direct-axis component deviation of input respectively
It changes, obtains the negative sequence voltage quadrature axis component deviation and direct-axis component deviation under rest frame, and export respectively；
The quadrature axis component given value of first Park inverse transform block output is superimposed the friendship of the 2nd Park inverse transform block output
Axis component deviation, the direct-axis component given value of the first Park inverse transform block output are superimposed the output of the 2nd Park inverse transform block
Direct-axis component deviation, superimposed two signal are separately input into pulse width modulation module.
The present invention is in use, in the intrinsic control ring of former variable-frequency power sources and connect negative voltage control ring, by negative phase-sequence
The output of voltage control loop and the output of former control ring are overlapped, to introduce negative sequence voltage during feedback control
The on-off control to power semiconductor in variable-frequency power sources is realized in the influence of component on this basis, final to realize to frequency conversion
The negative sequence voltage of power supply inhibits.The algorithm of pulse width modulation module is existing algorithm.
Preferably, in negative voltage control ring of the present invention, the transformation angle of the 2nd Park inverse transform block, in control ring
The first Park inverse transform block transformation angle opposite in phase.
Preferably, the deviation controller is PI controller or PID controller.As PI controller can realize DC component
Floating regulation.
Preferably, in the quadrature axis component branch and direct-axis component branch of negative voltage control ring, it is input to comparison operation mould
The quadrature axis component given value and direct-axis component given value of the negative sequence voltage of block are respectively 0.It is applicable to control mesh when variable-frequency power sources
When being designated as exporting pure sequence voltage, once the negative sequence voltage components of variable-frequency power sources output voltage are not zero, it will be generated with 0 inclined
Difference, deviation action and pi regulator change output valve, are finally 0 by negative sequence voltage components control.
Beneficial effect
1) using the negative sequence component of variable-frequency power sources output voltage as control target, increase negative voltage control ring is the present invention
Independent control ring has no effect on the stability of original control ring；
2) algorithm calculation amount is small, and negative voltage control ring and original control ring are relationships in parallel, and executing efficiency is high；
3) without acquiring output electric current closed-loop control only can be realized by Voltage Feedback amount, stability is good, side in this method
Method is simply easily realized.
Detailed description of the invention
Fig. 1 show present system control principle schematic diagram；
Fig. 2 show variable-frequency power sources application environment schematic diagram.
Specific embodiment
It is further described below in conjunction with the drawings and specific embodiments.
Referring to figs. 1 and 2, variable-frequency power sources of the invention exports negative voltage control method, comprising steps of
S1 samples the real-time output voltage signal of variable-frequency power sources, and the voltage signal obtained to sampling decomposes,
Obtain the quadrature axis component U of negative sequence voltage in output voltage under rotating coordinate systemq_NWith direct-axis component Ud_N；
S2 sets the quadrature axis component and direct-axis component of negative sequence voltage given value, by the quadrature axis component of negative sequence voltage given value
And direct-axis component, respectively with the quadrature axis component U of the obtained negative sequence voltage of step S1q_NWith direct-axis component Ud_NAdditive operation is carried out,
Obtain the quadrature axis component deviation and direct-axis component deviation of negative sequence voltage；
S3 carries out deviation tune to the quadrature axis component deviation and direct-axis component deviation of the obtained negative sequence voltage of step S2 respectively
Section, the negative sequence voltage quadrature axis component deviation v after obtaining bias adjustmentq N*With direct-axis component deviation vd N*；
S4, to the quadrature axis component deviation v of the obtained negative sequence voltage of step S3q N*With direct-axis component deviation vd N*, carry out respectively
Park inverse transformation obtains the negative sequence voltage quadrature axis component deviation u under rest frameβN_refWith direct-axis component deviation uαN_ref；
S5 sets the quadrature axis component given value u of variable-frequency power sources target voltageq_refWith direct-axis component given value ud_ref, warp
Park inverse transformation obtains quadrature axis component given value and direct-axis component given value under rest frame；
S6, the negative sequence voltage quadrature axis component deviation u under the rest frame that S3 is obtainedβN_refWith direct-axis component deviation
uαN_ref, quadrature axis component given value and direct-axis component given value under the rest frame obtained with S4 respectively correspond superposition, fold
Input signal of the signal as pulse width modulation algorithm after adding；
S7, using the on off operating mode of each controllable switch in pulse width modulation algorithm control variable-frequency power sources, to the defeated of variable-frequency power sources
Voltage is controlled out.
The step S7 of the method for the present invention is the prior art, and the present invention is directed to pulsewidth modulation is added in the influence of negative sequence voltage to calculate
In the input of method, so that system takes into account the control of variable-frequency power sources the influence of negative sequence voltage, and then the suppression of negative sequence voltage is realized
Production is used.
Embodiment
Such as the embodiment of Fig. 1, in step S2, the quadrature axis component and direct-axis component of negative sequence voltage given value are respectively set as 0.
When can be used for variable-frequency power sources control target to export pure sequence voltage, once control system detects variable-frequency power sources output voltage
Negative sequence voltage components are not zero, and will and 0 generate deviation, deviation action and pi regulator change output valve, finally by negative phase-sequence electricity
Pressing component control is 0.
In step S3, deviation tune is carried out using quadrature axis component deviation and direct-axis component deviation of the pi regulator to negative sequence voltage
Section, pi regulator can realize floating regulation to DC component.
The angle of Park inverse transformation in step S4 is opposite with the angular phase of Park inverse transformation in step S5.Such as Fig. 1 institute
Show, if the transformation angle of Park inverse transformation is θ in variable-frequency power sources output voltage control ring, the Park contravariant in negative sequence voltage ring
The transformation angle changed is-θ.
Embodiment 2
The present embodiment is that a kind of variable-frequency power sources exports negative voltage control system, with reference to Fig. 1 and Fig. 2:
Variable-frequency power sources includes control ring and pulse width modulation module, and control ring includes the first Park inverse transform block, and first
The quadrature axis component given value and direct-axis component given value of the input terminal access variable-frequency power sources output voltage of Park inverse transform block, the
The output end of one Park inverse transform block exports quadrature axis component given value and direct-axis component given value under rest frame respectively；
It further include negative voltage control ring, negative voltage control ring is defeated including the 2nd Park inverse transform block, quadrature axis component
Enter branch and direct-axis component input branch；Quadrature axis component branch and direct-axis component branch road are respectively equipped with comparison operation module and partially
Poor control module；
In quadrature axis component branch, the friendship of negative sequence voltage in the input terminal input variable-frequency power sources output voltage of comparison operation module
The quadrature axis component given value of axis component and negative sequence voltage, comparison operation module compare the deviation of two input values, and by comparison result
To deviation controller, the output end of deviation controller connects the input terminal of the 2nd Park inverse transform block for output；
In direct-axis component branch, negative sequence voltage is straight in the input terminal input variable-frequency power sources output voltage of comparison operation module
The direct-axis component given value of axis component and negative sequence voltage, comparison operation module compare the deviation of two input values, and by comparison result
To deviation controller, the output end of deviation controller connects the input terminal of the 2nd Park inverse transform block for output；
2nd Park inverse transform block carries out Park contravariant to the quadrature axis component deviation and direct-axis component deviation of input respectively
It changes, obtains the negative sequence voltage quadrature axis component deviation and direct-axis component deviation under rest frame, and export respectively；
The quadrature axis component given value of first Park inverse transform block output is superimposed the friendship of the 2nd Park inverse transform block output
Axis component deviation, the direct-axis component given value of the first Park inverse transform block output are superimposed the output of the 2nd Park inverse transform block
Direct-axis component deviation, superimposed two signal are separately input into pulse width modulation module.
The present invention is in use, in the intrinsic control ring of former variable-frequency power sources and connect negative voltage control ring, by negative phase-sequence
The output of voltage control loop and the output of former control ring are overlapped, to introduce negative sequence voltage during feedback control
The on-off control to power semiconductor in variable-frequency power sources is realized in the influence of component on this basis, final to realize to frequency conversion
The negative sequence voltage of power supply inhibits.The algorithm of pulse width modulation module is existing algorithm.
In negative voltage control ring, the transformation angle of the 2nd Park inverse transform block is anti-with the first Park in control ring
The transformation angle opposite in phase of conversion module.
Deviation controller is PI controller or PID controller.As PI controller can realize floating regulation to DC component.
In the quadrature axis component branch and direct-axis component branch of negative voltage control ring, it is input to the negative phase-sequence of comparison operation module
The quadrature axis component given value and direct-axis component given value of voltage are respectively 0.It is applicable to when variable-frequency power sources control target be output
When pure sequence voltage, once the negative sequence voltage components of variable-frequency power sources output voltage are not zero, will and 0 generate deviation, deviation make
With with pi regulator, change output valve, finally by negative sequence voltage components control be 0.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of variable-frequency power sources exports negative voltage control method, characterized in that include:
S1 samples the real-time output voltage signal of variable-frequency power sources, and the voltage signal obtained to sampling decomposes, and obtains
Under rotating coordinate system in output voltage negative sequence voltage quadrature axis component Uq_NWith direct-axis component Ud_N；
S2 sets the quadrature axis component and direct-axis component of negative sequence voltage given value, by the quadrature axis component of negative sequence voltage given value and directly
Axis component, respectively with the quadrature axis component U of the obtained negative sequence voltage of step S1q_NWith direct-axis component Ud_NAdditive operation is carried out, is obtained
The quadrature axis component deviation and direct-axis component deviation of negative sequence voltage；
S3 carries out bias adjustment respectively, obtains to the quadrature axis component deviation and direct-axis component deviation of the obtained negative sequence voltage of step S2
Negative sequence voltage quadrature axis component deviation v after to bias adjustmentq N*With direct-axis component deviation vd N*；
S4, to the quadrature axis component deviation v of the obtained negative sequence voltage of step S3q N*With direct-axis component deviation vd N*, Park is carried out respectively
Inverse transformation obtains the negative sequence voltage quadrature axis component deviation u under rest frameβN_refWith direct-axis component deviation uαN_ref；
S5 sets the quadrature axis component given value u of variable-frequency power sources target voltageq_refWith direct-axis component given value ud_ref, anti-through Park
Transformation obtains the quadrature axis component given value and direct-axis component given value under rest frame；
S6, the negative sequence voltage quadrature axis component deviation u under the rest frame that S3 is obtainedβN_refWith direct-axis component deviation uαN_ref,
Quadrature axis component given value and direct-axis component given value under the rest frame obtained with S4, respectively correspond superposition, superimposed
Input signal of the signal as pulse width modulation algorithm；
S7, using the on off operating mode of each controllable switch in pulse width modulation algorithm control variable-frequency power sources, to the output electricity of variable-frequency power sources
Pressure is controlled；
The angle of Park inverse transformation in step S4 is opposite with the angular phase of Park inverse transformation in step S5.
2. according to the method described in claim 1, it is characterized in that, in step S2, the quadrature axis component of negative sequence voltage given value and straight
Axis component is respectively set as 0.
3. according to the method described in claim 1, it is characterized in that, in step S3, using pi regulator to the quadrature axis of negative sequence voltage
Component deviation and direct-axis component deviation carry out bias adjustment.
4. according to the method described in claim 1, it is characterized in that, in step S3, using PID regulator to the quadrature axis of negative sequence voltage
Component deviation and direct-axis component deviation carry out bias adjustment.
5. a kind of variable-frequency power sources exports negative voltage control system, variable-frequency power sources includes control ring and pulse width modulation module, control
Ring includes the first Park inverse transform block, the quadrature axis of the input terminal access variable-frequency power sources output voltage of the first Park inverse transform block
Component given value and direct-axis component given value, the output end of the first Park inverse transform block export the friendship under rest frame respectively
Axis component given value and direct-axis component given value；It is characterized in that:
It further include negative voltage control ring, negative voltage control ring includes the 2nd Park inverse transform block, quadrature axis component input branch
Road and direct-axis component input branch；Quadrature axis component branch and direct-axis component branch road are respectively equipped with comparison operation module and deviation control
Molding block；
In quadrature axis component branch, the quadrature axis point of negative sequence voltage in the input terminal input variable-frequency power sources output voltage of comparison operation module
The quadrature axis component given value of amount and negative sequence voltage, comparison operation module compares the deviation of two input values, and comparison result is exported
To deviation controller, the output end of deviation controller connects the input terminal of the 2nd Park inverse transform block；
In direct-axis component branch, the d-axis point of negative sequence voltage in the input terminal input variable-frequency power sources output voltage of comparison operation module
The direct-axis component given value of amount and negative sequence voltage, comparison operation module compares the deviation of two input values, and comparison result is exported
To deviation controller, the output end of deviation controller connects the input terminal of the 2nd Park inverse transform block；
2nd Park inverse transform block carries out Park inverse transformation to the quadrature axis component deviation and direct-axis component deviation of input respectively, obtains
Negative sequence voltage quadrature axis component deviation and direct-axis component deviation under to rest frame, and export respectively；
The quadrature axis component given value of first Park inverse transform block output is superimposed the quadrature axis point of the 2nd Park inverse transform block output
Deviation is measured, the direct-axis component given value of the first Park inverse transform block output is superimposed the d-axis of the 2nd Park inverse transform block output
Component deviation, superimposed two signal are separately input into pulse width modulation module；
In negative voltage control ring, the transformation angle of the 2nd Park inverse transform block, with the first Park inverse transformation in control ring
The transformation angle opposite in phase of module.
6. variable-frequency power sources according to claim 5 exports negative voltage control system, characterized in that the deviation controller
For PI controller or PID controller.
7. variable-frequency power sources according to claim 5 exports negative voltage control system, characterized in that negative voltage control ring
Quadrature axis component branch and direct-axis component branch in, be input to the negative sequence voltage of comparison operation module quadrature axis component given value and
Direct-axis component given value is respectively 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708379.5A CN107528479B (en) | 2017-08-17 | 2017-08-17 | A kind of variable-frequency power sources output negative voltage control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708379.5A CN107528479B (en) | 2017-08-17 | 2017-08-17 | A kind of variable-frequency power sources output negative voltage control method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107528479A CN107528479A (en) | 2017-12-29 |
| CN107528479B true CN107528479B (en) | 2019-08-30 |
Family
ID=60681465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710708379.5A Active CN107528479B (en) | 2017-08-17 | 2017-08-17 | A kind of variable-frequency power sources output negative voltage control method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107528479B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861253B (en) * | 2018-12-19 | 2022-11-18 | 深圳市艾普诺电子有限公司 | Method for inhibiting unbalance of UPS three-phase output voltage |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230031A (en) * | 2016-09-30 | 2016-12-14 | 重庆大学 | Containing permanent magnet direct-drive wind energy turbine set and the control method mixing wind farm group of asynchronous wind energy turbine set under unbalanced source voltage |
-
2017
- 2017-08-17 CN CN201710708379.5A patent/CN107528479B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230031A (en) * | 2016-09-30 | 2016-12-14 | 重庆大学 | Containing permanent magnet direct-drive wind energy turbine set and the control method mixing wind farm group of asynchronous wind energy turbine set under unbalanced source voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107528479A (en) | 2017-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | Analysis and design of vector control for VSC-HVDC connected to weak grids | |
| Zou et al. | Modeling, analysis, and design of multifunction grid-interfaced inverters with output LCL filter | |
| CN105743091B (en) | A kind of double close-loop decoupling control method of Active Power Filter-APF | |
| Tenti et al. | Control of utility interfaces in low voltage microgrids | |
| CN104836232A (en) | Frequency wide-range self-adaptive repetition control method of active power filter | |
| CN104410099A (en) | Converter control strategy for multifunctional energy storage system of light storage power station | |
| CN107394779A (en) | A kind of micro-capacitance sensor Active Power Filter-APF Dynamic performance Optimization control method | |
| CN107528479B (en) | A kind of variable-frequency power sources output negative voltage control method and system | |
| CN104410074A (en) | PI adaptation based compound control method for active power filter | |
| CN104320030B (en) | Control method and control device for rectification voltage of permanent magnet synchronous wind driven generator | |
| Zhou et al. | New control strategy for three-phase grid-connected LCL inverters without a phase-locked loop | |
| Wang et al. | An improved adaptive droop control strategy for power sharing in micro-grid | |
| Kumar et al. | PI, fuzzy logic controlled shunt active power filter for three-phase four-wire systems with balanced, unbalanced and variable loads | |
| Lorzadeh et al. | A hierarchical control scheme for reactive power and harmonic current sharing in islanded microgrids | |
| CN105552958A (en) | Constant frequency hysteresis current control method for photovoltaic grid-connected inverter | |
| CN108134391A (en) | A kind of control method of Three-Phase PWM Rectifier for grid voltage waveform distortion | |
| Qasim et al. | ADALINE based control strategy for three-phase three-wire UPQC system | |
| Chilipi et al. | Adaptive notch filter based multipurpose control scheme for grid-interfaced three-phase four-wire DG inverter | |
| KR102168161B1 (en) | Matrix Rectifier and The Method for Controlling Input Power Factor of The Matrix Rectifier | |
| CN109245088B (en) | Method for extracting line stability characteristics of direct-current micro-grid | |
| Singh et al. | Real time implementation of sign-sign lms algorithm in single phase SPV grid integrated system | |
| CN207530547U (en) | A kind of twin-stage photovoltaic power generation grid-connecting apparatus | |
| Kumar et al. | Design & simulation of boost converter for power factor correction and THD reduction | |
| Singhal et al. | Stability of synchronous reference frame-phase locked loop for grid-connected inverter | |
| CN105391326B (en) | A kind of control method and device of the DC component of photovoltaic inversion |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |