CN112186798A - Distributed energy storage grid-connected inverter control system - Google Patents
Distributed energy storage grid-connected inverter control system Download PDFInfo
- Publication number
- CN112186798A CN112186798A CN202010960722.7A CN202010960722A CN112186798A CN 112186798 A CN112186798 A CN 112186798A CN 202010960722 A CN202010960722 A CN 202010960722A CN 112186798 A CN112186798 A CN 112186798A
- Authority
- CN
- China
- Prior art keywords
- module
- voltage
- signal
- energy storage
- distributed energy
- 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
- 238000004146 energy storage Methods 0.000 title claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 49
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 230000009466 transformation Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000306 component Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000008358 core component Substances 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a distributed energy storage grid-connected inversion control system, which comprises an electric signal acquisition module, a Park conversion module, a parameter calculation module, a droop control module, a double-loop control module, a PWM (pulse-width modulation) generation module, a voltage inversion module and a filtering module; the input end of the voltage inversion module is connected with the distributed energy storage equipment, the output end of the voltage inversion module is connected with the input end of the filtering module, and the output end of the filtering module is connected with the alternating current power grid side; the electric signal acquisition module is connected with the output end of the filtering module, the electric signal acquisition module is connected with the Park conversion module, the Park conversion module is connected with the parameter calculation module, the parameter calculation module is connected with the droop control module, the droop control module is connected with the double-ring control module, the double-ring control module is connected with the PWM generation module, and the PWM generation module is connected with the control end of the voltage inversion module. The embodiment of the invention can improve the power supply quality and the power supply stability of the distributed energy storage equipment.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a distributed energy storage grid-connected inverter control system.
Background
In recent years, distributed energy storage power generation becomes one of main development directions of future energy, however, output power generated by distributed energy storage equipment in a grid connection process has certain fluctuation, and if the output power is not regulated and controlled, impact is caused on a traditional alternating current power grid, so that the operation stability of the alternating current power grid and the power supply quality of a user side are reduced. The main core part of the grid-connected inverter control system based on distributed energy storage is a voltage inverter module, and how to eliminate the grid-connected contradiction between the distributed energy storage equipment and an alternating current power grid by adjusting the control parameters of the voltage inverter module is the problem to be solved by the invention.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a distributed energy storage grid-connected inversion control system which can improve the power supply quality and power supply stability of distributed energy storage equipment by adjusting the control parameters of a voltage inversion module in real time.
In order to solve the problems, the invention provides a distributed energy storage grid-connected inversion control system, which comprises an electric signal acquisition module, a Park conversion module, a parameter calculation module, a droop control module, a double-ring control module, a PWM (pulse width modulation) generation module, a voltage inversion module and a filtering module; wherein,
the input end of the voltage inversion module is connected with the distributed energy storage equipment, the output end of the voltage inversion module is connected with the input end of the filtering module, and the output end of the filtering module is connected with the alternating current power grid side;
the electric signal acquisition module is connected with the output end of the filtering module, the electric signal acquisition module is connected with the Park conversion module, the Park conversion module is connected with the parameter calculation module, the parameter calculation module is connected with the droop control module, the droop control module is connected with the double-ring control module, the double-ring control module is connected with the Park conversion module, the double-ring control module is connected with the PWM generation module, and the PWM generation module is connected with the control end of the voltage inversion module.
Optionally, the electric signal acquisition module includes a voltage acquisition unit and a current acquisition unit;
the voltage acquisition unit is connected with the output end of the filtering module, and the current acquisition unit is connected with the output end of the filtering module; the voltage acquisition unit is used for acquiring three-phase alternating current voltage instantaneous signals output by the voltage inversion module, and the current acquisition unit is used for acquiring three-phase alternating current instantaneous signals output by the voltage inversion module.
Optionally, the Park transformation module includes a first Park transformation unit and a second Park transformation unit;
the first Park conversion unit is connected with the voltage acquisition unit, and the second Park conversion unit is connected with the current acquisition unit; the first Park conversion unit is used for converting the three-phase alternating current instantaneous signal into a two-phase direct current voltage signal, and the second Park conversion unit is used for converting the three-phase alternating current instantaneous signal into a two-phase direct current signal.
Optionally, the parameter calculation module includes an amplitude calculation unit, a frequency calculation unit, and a power calculation unit;
the amplitude calculation unit is connected with the first Park conversion unit, and the frequency calculation unit is connected with the first Park conversion unit; the power calculation unit is connected with the first Park conversion unit, and the power calculation unit is connected with the second Park conversion unit; the amplitude calculation unit is used for extracting a corresponding amplitude signal from the two-phase direct-current voltage signals, the frequency calculation unit is used for decomposing a corresponding angular frequency signal from the two-phase direct-current voltage signals, and the power calculation unit is used for acquiring two-phase active power and two-phase reactive power output by the voltage inversion module.
Optionally, the amplitude calculation unit includes a first PI regulator, and the first PI regulator is configured to perform closed-loop control adjustment on a transfer coefficient affecting the amplitude signal.
Optionally, the frequency calculation unit includes a PLL phase-locked loop and a second PI regulator, and the PLL phase-locked loop is connected to the second PI regulator; the PLL is used for extracting a corresponding phase angle signal from the two-phase direct-current voltage signal and converting the phase angle signal into the angular frequency signal; and the second PI regulator is used for carrying out closed-loop control adjustment on the transmission coefficient influencing the angular frequency signal.
Optionally, the droop control module is connected to the amplitude calculation unit, the frequency calculation unit, and the power calculation unit, and the droop control module is configured to obtain an amplitude and an angular frequency of an expected output voltage of the voltage inverter module.
Optionally, the dual-ring control module includes an outer ring controller and an inner ring controller;
the outer ring controller is connected with the droop control module, the inner ring controller is connected with the outer ring controller, and the inner ring controller is connected with the second Park conversion unit; the outer loop controller is used for generating an inner loop current reference signal based on the amplitude and the angular frequency of the expected output voltage, and the inner loop controller is used for performing fine adjustment on the inner loop current reference signal based on the two-phase direct current signal and generating an output modulation signal.
Optionally, the PWM generating module is connected to the inner loop controller, and the PWM generating module is configured to generate a corresponding SPWM waveform according to the output modulation signal, and output the SPWM waveform to the voltage inverting module for voltage output adjustment.
Optionally, the voltage inverting module includes a three-phase voltage source inverter.
The distributed energy storage grid-connected inversion control system provided by the embodiment of the invention aims at adjusting the control parameters of the voltage inversion module in real time, and the output signals of the voltage inversion module are distinguished and converted through the electric signal acquisition module, the Park conversion module and the parameter calculation module, so that the system has reliable reference indexes; meanwhile, the droop control module and the double-ring control module can effectively restrain the output voltage amplitude and the angular frequency deviation of the voltage inversion module, so that the power supply quality and the power supply stability of the distributed energy storage equipment are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural composition diagram of a distributed energy storage grid-connected inverter control system disclosed in the embodiment of the present invention;
fig. 2 is a schematic diagram of a specific structural composition of a distributed energy storage grid-connected inverter control system disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a schematic structural composition diagram of a distributed energy storage grid-connected inversion control system in an embodiment of the present invention, where the system includes an electrical signal acquisition module, a Park conversion module, a parameter calculation module, a droop control module, a dual-loop control module, a PWM generation module, a voltage inversion module, and a filtering module.
Basically, the input end of the voltage inversion module is connected with the distributed energy storage device, the output end of the voltage inversion module is connected with the input end of the filter module, and the output end of the filter module is connected with the alternating current power grid side; the electric signal acquisition module is connected with the output end of the filtering module, the electric signal acquisition module is connected with the Park conversion module, the Park conversion module is connected with the parameter calculation module, the parameter calculation module is connected with the droop control module, the droop control module is connected with the double-ring control module, the double-ring control module is connected with the Park conversion module, the double-ring control module is connected with the PWM generation module, and the PWM generation module is connected with the control end of the voltage inversion module.
In an embodiment of the present invention, the voltage inverting module includes a three-phase voltage type inverter, which is a core component of the system, and is capable of converting a dc power output by the distributed energy storage device into an ac power available to the ac power grid side, and the filtering module is capable of removing harmonic interference in the ac power to meet a requirement for power supply to the ac power grid side; the electric signal acquisition module, the Park conversion module and the parameter calculation module are used as the precondition for adjusting the control parameters of the voltage inversion module, and the output voltage signal and the output current signal of the voltage inversion module can be converted into useful information for adjusting the control parameters in real time; the droop control module, the double-ring control module and the PWM generation module are combined to be used as a key part of the system, and the voltage regulation waveform with high precision can be extracted by using the useful information, so that the power supply efficiency and reliability of the distributed energy storage equipment can be effectively improved.
Based on a schematic structural composition diagram of the distributed energy storage grid-connected inverter control system shown in fig. 1, fig. 2 illustrates each module included in the system as follows:
further, the electric signal acquisition module comprises a voltage acquisition unit and a current acquisition unit; the voltage acquisition unit is connected with the output end of the filtering module, and the current acquisition unit is connected with the output end of the filtering module. In the embodiment of the invention, the voltage acquisition unit and the current acquisition unit both have real-time acquisition performance, the voltage acquisition unit is used for acquiring the three-phase alternating current voltage instantaneous signals output by the voltage inversion module, and the current acquisition unit is used for acquiring the three-phase alternating current instantaneous signals output by the voltage inversion module, so that the system can effectively execute data updating processing.
Further, the Park transformation module comprises a first Park transformation unit and a second Park transformation unit; the first Park conversion unit is connected with the voltage acquisition unit, and the second Park conversion unit is connected with the current acquisition unit. In the embodiment of the invention, the first Park conversion unit is used for converting the three-phase alternating current voltage instantaneous signal into a two-phase direct current voltage signal, and the second Park conversion unit is used for converting the three-phase alternating current instantaneous signal into a two-phase direct current signal; in more detail, the specific working principle of the first Park transformation unit and the second Park transformation unit is to transform the three-phase alternating current instantaneous signal to a dq rotating coordinate system for representation, that is, decoupling of active components and reactive components is realized through dq transformation.
Further, the parameter calculation module comprises an amplitude calculation unit, a frequency calculation unit and a power calculation unit; the amplitude calculation unit is connected with the first Park conversion unit, and the frequency calculation unit is connected with the first Park conversion unit; the power calculation unit is connected with the first Park conversion unit, and the power calculation unit is connected with the second Park conversion unit. In the embodiment of the present invention, the amplitude calculation unit is configured to extract a corresponding amplitude signal from the two-phase direct-current voltage signals, the frequency calculation unit is configured to decompose a corresponding angular frequency signal from the two-phase direct-current voltage signals, and the power calculation unit is configured to obtain two-phase active power and two-phase reactive power output by the voltage inversion module.
The power calculation unit calculates two-phase active power P output by the voltage inversion module based on conversion results of the first Park conversion unit and the second Park conversion unitdqAnd two-phase reactive power QdqRespectively as follows:
in the formula of UdIs the d-axis component, U, of the two-phase DC voltage signalqIs the q-axis component, I, of the two-phase DC voltage signaldIs the d-axis component, I, of the two-phase DC current signalqIs the q-axis component of the two-phase direct current signal.
Specifically, the amplitude calculation unit includes a first PI regulator, and the first PI regulator is configured to perform closed-loop control adjustment on a transfer coefficient k affecting the amplitude signal, as follows:
in formula (II) U'dFor a desired bus voltage amplitude, U is the current output voltage amplitude of the inverter, kpUIs an amplitude scaling factor, TiUIs the time constant of the amplitude variation, s is the s-domain coefficient of the Laplace transform, UdFor the current bus voltage amplitude, U0The amplitude of the output voltage when the inverter is in no-load state.
Specifically, the frequency calculation unit includes a PLL phase-locked loop and a second PI regulator, and the PLL phase-locked loop is connected to the second PI regulator. In the embodiment of the present invention, the PLL phase-locked loop is configured to extract a corresponding phase angle signal from the two-phase dc voltage signals, and convert the phase angle signal into the angular frequency signal based on a laplace transform method; the second PI regulator is configured to perform closed-loop control adjustment on a transmission coefficient m affecting the angular frequency signal, as follows:
in formula (II), omega'dAt the desired angular frequency of the bus voltage, ω is the current angular frequency of the output voltage of the inverter, kpωIs the angular frequency proportionality coefficient, TiωIs the time constant of angular frequency change, s is the s-domain coefficient of Laplace transform, omegadFor the angular frequency, omega, of the current bus voltage0The angular frequency of the output voltage when the inverter is unloaded.
Further, the droop control module is connected to the amplitude calculation unit, the frequency calculation unit, and the power calculation unit, respectively, and based on the output results of the amplitude calculation unit, the frequency calculation unit, and the power calculation unit, the droop control module obtains an amplitude U' of the expected output voltage of the voltage inverter module as: u ═ U0-kQdqAnd the angular frequency ω' of the desired output voltage is: ω' ═ ω0-mPdq。
Further, the double-ring control module comprises an outer ring controller and an inner ring controller; the outer ring controller is connected with the droop control module, the inner ring controller is connected with the outer ring controller, and the inner ring controller is connected with the second Park conversion unit. In an embodiment of the present invention, the outer-loop controller is configured to generate an inner-loop current reference signal based on the amplitude and the frequency of the desired output voltage, and the inner-loop controller is configured to perform fine tuning on the inner-loop current reference signal based on the two-phase dc current signal and generate an output modulation signal.
Specifically, the outer loop controller preferentially combines the expected output voltage of the voltage inverter module according to the amplitude and angular frequency of the expected output voltage, and then converts a comparison result into the inner loop current reference signal by using an internal voltage-to-current chip based on a comparison result with a reference voltage set by the outer loop controller, where the comparison result includes: if the expected output voltage is greater than the reference voltage, the comparison result is the expected output voltage; and if the expected output voltage is smaller than the reference voltage, the comparison result is the reference voltage.
Specifically, the inner loop controller preferentially performs cross-coupling compensation on the inner loop current reference signal based on the two-phase direct current signal output by the second Park conversion unit, and generates an output voltage control signal; and then optimizing the output voltage control signal by using an internal module value limiter to finally obtain the output modulation signal, so that the voltage inversion module can be ensured to be in a linear modulation state, and the power supply stability of the distributed energy storage equipment is improved.
Further, the PWM generating module is connected to the inner loop controller, and the PWM generating module is configured to generate a corresponding SPWM waveform according to the output modulation signal, and output the SPWM waveform to the voltage inverting module for voltage output adjustment. In the embodiment of the invention, because the output modulation signal is substantially a numerical value on a dq rotation coordinate system, the PWM generation module can preferentially convert the output modulation signal into a three-phase modulation signal, and then convert the three-phase modulation signal into an SPWM waveform to be output to the control end of the voltage inversion module, so as to assist the distributed energy storage device to complete grid-connected operation with high reliability.
The distributed energy storage grid-connected inversion control system provided by the embodiment of the invention aims at adjusting the control parameters of the voltage inversion module in real time, and the output signals of the voltage inversion module are distinguished and converted through the electric signal acquisition module, the Park conversion module and the parameter calculation module, so that the system has reliable reference indexes; meanwhile, the droop control module and the double-ring control module can effectively restrain the output voltage amplitude and the angular frequency deviation of the voltage inversion module, so that the power supply quality and the power supply stability of the distributed energy storage equipment are improved.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
The distributed energy storage grid-connected inverter control system provided by the embodiment of the invention is described in detail, a specific example is adopted in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A distributed energy storage grid-connected inversion control system is characterized by comprising an electric signal acquisition module, a Park conversion module, a parameter calculation module, a droop control module, a double-loop control module, a PWM (pulse-width modulation) generation module, a voltage inversion module and a filtering module; wherein,
the input end of the voltage inversion module is connected with the distributed energy storage equipment, the output end of the voltage inversion module is connected with the input end of the filtering module, and the output end of the filtering module is connected with the alternating current power grid side;
the electric signal acquisition module is connected with the output end of the filtering module, the electric signal acquisition module is connected with the Park conversion module, the Park conversion module is connected with the parameter calculation module, the parameter calculation module is connected with the droop control module, the droop control module is connected with the double-ring control module, the double-ring control module is connected with the Park conversion module, the double-ring control module is connected with the PWM generation module, and the PWM generation module is connected with the control end of the voltage inversion module.
2. The distributed energy storage grid-connected inversion control system according to claim 1, wherein the electric signal acquisition module comprises a voltage acquisition unit and a current acquisition unit;
the voltage acquisition unit is connected with the output end of the filtering module, and the current acquisition unit is connected with the output end of the filtering module; the voltage acquisition unit is used for acquiring three-phase alternating current voltage instantaneous signals output by the voltage inversion module, and the current acquisition unit is used for acquiring three-phase alternating current instantaneous signals output by the voltage inversion module.
3. The distributed energy storage grid-connected inversion control system according to claim 2, wherein the Park transformation module comprises a first Park transformation unit and a second Park transformation unit;
the first Park conversion unit is connected with the voltage acquisition unit, and the second Park conversion unit is connected with the current acquisition unit; the first Park conversion unit is used for converting the three-phase alternating current instantaneous signal into a two-phase direct current voltage signal, and the second Park conversion unit is used for converting the three-phase alternating current instantaneous signal into a two-phase direct current signal.
4. The distributed energy storage grid-connected inversion control system according to claim 3, wherein the parameter calculation module comprises an amplitude calculation unit, a frequency calculation unit and a power calculation unit;
the amplitude calculation unit is connected with the first Park conversion unit, and the frequency calculation unit is connected with the first Park conversion unit; the power calculation unit is connected with the first Park conversion unit, and the power calculation unit is connected with the second Park conversion unit; the amplitude calculation unit is used for extracting a corresponding amplitude signal from the two-phase direct-current voltage signals, the frequency calculation unit is used for decomposing a corresponding angular frequency signal from the two-phase direct-current voltage signals, and the power calculation unit is used for acquiring two-phase active power and two-phase reactive power output by the voltage inversion module.
5. The distributed energy storage grid-connected inverter control system according to claim 4, wherein the amplitude calculation unit comprises a first PI regulator, and the first PI regulator is used for performing closed-loop control adjustment on a transmission coefficient influencing the amplitude signal.
6. The distributed energy storage grid-connected inverter control system according to claim 5, wherein the frequency calculation unit comprises a PLL phase-locked loop and a second PI regulator, and the PLL phase-locked loop is connected with the second PI regulator; the PLL is used for extracting a corresponding phase angle signal from the two-phase direct-current voltage signal and converting the phase angle signal into the angular frequency signal; and the second PI regulator is used for carrying out closed-loop control adjustment on the transmission coefficient influencing the angular frequency signal.
7. The distributed energy storage grid-connected inversion control system according to claim 6, wherein the droop control module is connected to the amplitude calculation unit, the frequency calculation unit and the power calculation unit, and is configured to obtain an amplitude and an angular frequency of an expected output voltage of the voltage inversion module.
8. The distributed energy storage grid-connected inversion control system according to claim 7, wherein the double-loop control module comprises an outer loop controller and an inner loop controller;
the outer ring controller is connected with the droop control module, the inner ring controller is connected with the outer ring controller, and the inner ring controller is connected with the second Park conversion unit; the outer loop controller is used for generating an inner loop current reference signal based on the amplitude and the angular frequency of the expected output voltage, and the inner loop controller is used for performing fine adjustment on the inner loop current reference signal based on the two-phase direct current signal and generating an output modulation signal.
9. The distributed energy storage grid-connected inverter control system according to claim 8, wherein the PWM generation module is connected to the inner loop controller, and the PWM generation module is configured to generate a corresponding SPWM waveform according to the output modulation signal, and output the SPWM waveform to the voltage inverter module for voltage output adjustment.
10. The distributed energy storage grid-connected inversion control system according to claim 9, wherein the voltage inversion module comprises a three-phase voltage-type inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960722.7A CN112186798B (en) | 2020-09-14 | 2020-09-14 | Distributed energy storage grid-connected inversion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960722.7A CN112186798B (en) | 2020-09-14 | 2020-09-14 | Distributed energy storage grid-connected inversion control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112186798A true CN112186798A (en) | 2021-01-05 |
| CN112186798B CN112186798B (en) | 2024-10-11 |
Family
ID=73920867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010960722.7A Active CN112186798B (en) | 2020-09-14 | 2020-09-14 | Distributed energy storage grid-connected inversion control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112186798B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015096586A1 (en) * | 2013-12-24 | 2015-07-02 | 中国西电电气股份有限公司 | Seamless switching method and system for micro-grid system |
| CN110572067A (en) * | 2019-08-19 | 2019-12-13 | 天津大学 | Island energy storage type power unit series micro-grid structure and control method |
| CN110797912A (en) * | 2019-11-01 | 2020-02-14 | 国网山东省电力公司济宁供电公司 | Droop control method and system applied to micro-source inverter of micro-grid |
-
2020
- 2020-09-14 CN CN202010960722.7A patent/CN112186798B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015096586A1 (en) * | 2013-12-24 | 2015-07-02 | 中国西电电气股份有限公司 | Seamless switching method and system for micro-grid system |
| CN110572067A (en) * | 2019-08-19 | 2019-12-13 | 天津大学 | Island energy storage type power unit series micro-grid structure and control method |
| CN110797912A (en) * | 2019-11-01 | 2020-02-14 | 国网山东省电力公司济宁供电公司 | Droop control method and system applied to micro-source inverter of micro-grid |
Non-Patent Citations (1)
| Title |
|---|
| 张雷: "分布式光伏储能系统并网研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112186798B (en) | 2024-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Givaki et al. | Current error based compensations for VSC current control in weak grids for wind farm applications | |
| Gao et al. | An improved direct power control for doubly fed induction generator | |
| Wu et al. | An improved repetitive control of DFIG-DC system for torque ripple suppression | |
| CN109638881B (en) | Virtual synchronization method and system for energy storage inverter with power grid strength self-adaptive optimization | |
| Liston et al. | A robust design of active damping with a current estimator for single-phase grid-tied inverters | |
| CN111313474B (en) | Improved micro-grid-connected presynchronization control method | |
| CN111525595A (en) | Virtual synchronous control system of power distribution network flexible switch device | |
| CN110994617A (en) | Current harmonic suppression method for virtual synchronous machine and control system of virtual synchronous machine | |
| CN114400703B (en) | Phase locking method for improving stability of grid-connected system under weak current grid condition | |
| CN116054233A (en) | Switching control method of grid-structured inverter with phase supporting capability under fault | |
| Chen et al. | A reconstructed singular return ratio matrix for optimizing design of the pll in grid-connected inverters | |
| CN116667439A (en) | Repeated active disturbance rejection control method and system for T-type three-level LCL-type inverter | |
| CN112186798A (en) | Distributed energy storage grid-connected inverter control system | |
| CN114244173A (en) | Grid voltage feedforward method for weak grid AC device, electronic equipment and medium | |
| CN113517724A (en) | Method for suppressing voltage ripple on direct current side of alternating current-direct current hybrid micro-grid | |
| CN117713085B (en) | Virtual admittance-based method and device for suppressing power oscillation of grid-structured converter | |
| CN117526428B (en) | Inverter networking control method based on Landolt-Stuttgart vibrator | |
| CN116155270B (en) | Method for adjusting three-phase voltage phase-locked loop by improving MSTOGI structure and nonlinear PI | |
| Rezazadeh et al. | Single-phase grid-forming inverters: a review | |
| CN110190765B (en) | Novel three-phase voltage type PWM converter disturbance-rejection method based on dead-beat control | |
| CN110061642B (en) | Three-phase voltage type PWM converter dead-beat control method based on stable controller | |
| CN109256817B (en) | Method and device for controlling direct-current micro-grid interface inverter to carry out frequency regulation | |
| CN118117677A (en) | Reactive power control method for energy storage grid-connected inverter in non-super-distribution mode | |
| Parmar et al. | Integration of field-oriented and steady-state linear Kalman filter control in PMSG-based grid-connected system for improving voltage control and power balance operation | |
| CN116388284A (en) | Phase-locked control method and circuit of LCL inverter |
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 |