CN117060411B - Electronic load harmonic suppression method, energy-feedback electronic load and storage medium - Google Patents
Electronic load harmonic suppression method, energy-feedback electronic load and storage medium Download PDFInfo
- Publication number
- CN117060411B CN117060411B CN202311053069.6A CN202311053069A CN117060411B CN 117060411 B CN117060411 B CN 117060411B CN 202311053069 A CN202311053069 A CN 202311053069A CN 117060411 B CN117060411 B CN 117060411B
- Authority
- CN
- China
- Prior art keywords
- phase
- component
- current
- harmonic
- electronic load
- 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
- 230000001629 suppression Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001914 filtration Methods 0.000 claims description 9
- 230000009466 transformation Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000002194 synthesizing effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 8
- 230000002401 inhibitory effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The application discloses an electronic load harmonic suppression method, energy-feedback electronic load and storage medium, through obtaining the three-phase voltage of the power grid side of the measured power supply, extract the positive sequence component in the three-phase voltage, obtain the target phase according to the positive sequence component, avoid the negative sequence component and the interference of the zero sequence component when the power grid frequency drifts or the situation such as the asymmetric appearance of voltage, accurately obtain the phase place of three-phase voltage, and then accurately obtain the harmonic current, inject the harmonic compensation current into the power grid again, restrain the harmonic, compare in traditional electric energy feedback type electronic load technique, the harmonic suppression effect is good, avoid causing the power grid harmonic pollution.
Description
Technical Field
The present disclosure relates to the field of electronic loads, and in particular, to an electronic load harmonic suppression method, an energy-feedback electronic load, and a storage medium.
Background
An electronic load is a device that consumes electrical energy by means of dissipated power of a power transistor by controlling the conduction of an internal power transistor or transistors. The electronic load is used for performing various aging tests and tests of input and output characteristics and the like on power supply equipment for a long time so as to test the reliability of the power supply equipment and test the technical indexes and the electrical performance of the power supply equipment. The superiority of the electric energy feedback type electronic load is obvious compared with the conventional energy consumption type load. However, when the power electronic load is under the working condition of a nonlinear load, harmonic voltages can be generated, and the harmonic components can be introduced into grid-connected current, so that the quality of the grid-fed current is reduced, and harmonic pollution of the power grid is caused.
One prior art technique suppresses harmonic pollution by obtaining harmonic currents and then injecting harmonic compensation currents into the grid that are the same in magnitude and opposite in phase to the harmonic currents. This technique relies on a phase lock to lock the three phase voltages of the grid and calculates the harmonic currents based on the phases of the three phase voltages. However, when the frequency of the power grid drifts or the voltage is asymmetric, the phase lock device is difficult to obtain an accurate phase, and the obtained phase has certain hysteresis due to the feedback loop of the phase lock device, so that the harmonic current cannot be accurately obtained, and the harmonic suppression effect is poor.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides an electronic load harmonic suppression method, an energy feedback type electronic load and a storage medium, which can solve the problem of poor suppression effect of the traditional electric energy feedback type electronic load harmonic.
An electronic load harmonic suppression method according to an embodiment of a first aspect of the present application includes:
obtaining three-phase current of a power grid;
converting the three-phase current into a two-phase current;
obtaining three-phase voltages of the power grid;
extracting a positive sequence component from the three-phase voltage;
converting the positive sequence component into a first component and a second component in a two-phase stationary coordinate system;
obtaining a target phase according to the first component and the second component, wherein the target phase is the phase of the three-phase voltage;
obtaining an active current component and a reactive current component according to the target phase and the two-phase current;
obtaining a first direct current component and a second direct current component according to the active current component and the reactive current component, wherein the first direct current component is the direct current component of the active current component, and the second direct current component is the direct current component of the reactive current component;
performing inverse conversion on the first direct current component and the second direct current component to obtain three-phase fundamental wave current;
obtaining harmonic current according to the three-phase current and the three-phase fundamental current;
and injecting harmonic compensation current into the power grid, wherein the harmonic compensation current is equal to the harmonic current in amplitude and opposite in phase.
The electronic load harmonic suppression method according to the embodiment of the first aspect of the application has at least the following beneficial effects:
the method comprises the steps of obtaining three-phase voltage of a power grid side of a tested power supply, extracting positive sequence components in the three-phase voltage, obtaining a target phase according to the positive sequence components, avoiding interference of negative sequence components and zero sequence components when the power grid frequency drifts or voltage asymmetry and the like occur, accurately obtaining the phase of the three-phase voltage, further accurately obtaining harmonic current, injecting harmonic compensation current into the power grid, and inhibiting harmonic. Compared with the traditional electric energy feedback type electronic load technology, the electronic load harmonic suppression method provided by the embodiment of the first aspect of the application is good in harmonic suppression effect and avoids causing harmonic pollution of a power grid.
According to some embodiments of the present application, the positive sequence component is obtained by the following formula:
wherein u is ap U is the first phasor of the positive sequence component bp As the second phasor of the positive sequence component, u cp U is the third phasor of the positive sequence component a A phase A voltage which is the three-phase voltage, u b A B-phase voltage which is the three-phase voltage, u c And j is an imaginary part of the C-phase voltage which is the three-phase voltage.
According to some embodiments of the present application, the converting the positive sequence component into a first component and a second component in a two-phase stationary coordinate system includes:
passing the positive sequence component through Clark e Transforming to obtain the first component and the second component.
According to some embodiments of the present application, the target phase is obtained by the following formula:
θ＝arctan(tan(ωt))，
wherein,ωt is the target phase, u α For the first component, u β And for the second component, θ is an included angle between a synthesized vector and the two-phase stationary coordinate system, and the synthesized vector is obtained by synthesizing the first component and the second component in the two-phase stationary coordinate system.
According to some embodiments of the present application, the two-phase current is obtained by the following formula:
wherein i is α And i β For the two-phase current, i a 、i b And i c For the three-phase current, C 32 Is a transformation matrix.
According to some embodiments of the present application, the active current component and the reactive current component are obtained by the following formula:
wherein i is p For the active current component, i q For the reactive current component ωt is the target phase i α And i β For the two-phase current.
According to some embodiments of the application, the deriving harmonic currents from the three-phase currents and the three-phase fundamental currents includes:
subtracting the three-phase fundamental current from the three-phase current to obtain the harmonic current.
An energy-feedback electronic load according to an embodiment of the second aspect of the present application, comprising:
the input end of the load module is used for being connected with a tested power supply;
the output end of the load module is connected with the input end of the inversion module, and the output end of the inversion module is used for being connected with a power grid;
and the control module is used for suppressing the harmonic wave through the electronic load harmonic wave suppression method.
The energy feedback type electronic load according to the embodiment of the second aspect of the application has at least the following beneficial effects:
the method comprises the steps of obtaining three-phase voltage of a power grid side of a tested power supply, extracting positive sequence components in the three-phase voltage, obtaining a target phase according to the positive sequence components, avoiding interference of negative sequence components and zero sequence components when the power grid frequency drifts or voltage asymmetry and the like occur, accurately obtaining the phase of the three-phase voltage, further accurately obtaining harmonic current, injecting harmonic compensation current into the power grid, and inhibiting harmonic. Compared with the traditional electric energy feedback type electronic load technology, the energy feedback type electronic load provided by the embodiment of the second aspect of the application has a good harmonic suppression effect, and avoids causing harmonic pollution of a power grid.
According to some embodiments of the present application, the power grid further comprises a filtering module, wherein an output end of the inversion module is connected with an input end of the filtering module, and an output end of the filtering module is connected with the power grid.
A computer readable storage medium according to an embodiment of the third aspect of the present application stores therein a processor-executable program for implementing the electronic load harmonic suppression method as described above when executed by a processor.
The computer readable storage medium according to the embodiment of the third aspect of the present application has at least the following advantageous effects:
the method comprises the steps of obtaining three-phase voltage of a power grid side of a tested power supply, extracting positive sequence components in the three-phase voltage, obtaining a target phase according to the positive sequence components, avoiding interference of negative sequence components and zero sequence components when the power grid frequency drifts or voltage asymmetry and the like occur, accurately obtaining the phase of the three-phase voltage, further accurately obtaining harmonic current, injecting harmonic compensation current into the power grid, and inhibiting harmonic. Compared with the traditional electric energy feedback type electronic load technology, the computer readable storage medium of the embodiment of the third aspect of the application has a good harmonic suppression effect and avoids causing harmonic pollution of a power grid.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The application is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method for electronic load harmonic suppression according to an embodiment of the present application;
fig. 2 is a schematic diagram of a composite vector according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that, with respect to the description of the orientation, such as the orientation or positional relationship indicated above, below, etc., the orientation or positional relationship shown based on the drawings is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, plural refers to two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, electrical connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1, the electronic load harmonic suppression method according to an embodiment of the present application includes, but is not limited to, step S100, step S200, step S300, step S400, step S500, step S600, step S700, step S800, step S900, step S110, and step S120.
Step S100: obtaining three-phase current of a power grid;
in the step, the three-phase current of the power grid connected with the tested power supply is detected, so that the harmonic current is calculated according to the three-phase current in the subsequent step.
Step S200: converting the three-phase current into a two-phase current;
the two-phase current is obtained by the following formula:
wherein i is α And i β For two-phase current, i a Ib and i c Is three-phase current, C 32 Is a transformation matrix.
In this step, three-phase currents in the three-phase abc coordinate system are converted to two-phase currents in the two-phase αβ coordinate system.
Step S300: obtaining three-phase voltage of a power grid;
in the step, three-phase voltage of the power grid is obtained, so that the phase of the three-phase voltage is obtained according to the three-phase voltage in the subsequent step.
Step S400: extracting a positive sequence component from the three-phase voltage;
it will be appreciated that the positive sequence component is obtained by the following formula:
wherein u is ap A first phasor, u, being a positive sequence component bp A second phasor, u, being a positive sequence component cp A third phasor, u, being a positive sequence component a A phase voltage which is three-phase voltage, u b B-phase voltage, u, which is three-phase voltage c The C-phase voltage, which is a three-phase voltage, j is the imaginary part.
In the step, positive sequence components are extracted from the three-phase voltage, so that interference between negative sequence components and zero sequence components is avoided under the conditions of drift of power grid frequency or voltage asymmetry and the like when the phase of the three-phase voltage is calculated in the subsequent step.
Step S500: converting the positive sequence component into a first component and a second component in a two-phase stationary coordinate system;
the first component and the second component are obtained by the following calculation formula:
wherein u is α As a first component, u β As a second component, u ap A first phasor, u, being a positive sequence component bp A second phasor, u, being a positive sequence component cp A third phasor that is a positive sequence component.
In the step, a first component and a second component in a two-phase alpha beta coordinate system are obtained by Clarke transformation of a positive sequence component in a three-phase abc coordinate system.
Step S600: obtaining a target phase according to the first component and the second component, wherein the target phase is the phase of the three-phase voltage;
it should be noted that the target phase is obtained by the following formula:
θ＝arctan(tan(ωt))，
wherein ωt is the target phase, u α As a first component, u β And θ is the included angle between the synthesized vector and the two-phase stationary coordinate system, and the synthesized vector is the synthesized result of the first component and the second component in the two-phase stationary coordinate system.
It should be noted that, as shown in fig. 2, the two-phase αβ coordinate system is a two-phase stationary coordinate system, two coordinate axes of the two-phase αβ coordinate system differ from each other by 90 °, three coordinate axes of the three-phase abc coordinate system differ from each other by 120 °, an α axis of the two-phase αβ coordinate system coincides with an a axis of the three-phase abc coordinate system, and θ is an included angle between the synthetic vector u and the α axis.
In the step, the phase of the three-phase voltage can be accurately calculated according to the first component and the second component.
Step S700: obtaining an active current component and a reactive current component according to the target phase and the two-phase current;
it will be appreciated that the active and reactive current components are obtained by the following formula:
wherein i is p I as active current component q For reactive current component, ωt is the target phase, i α And i β Is a two-phase current.
In the step, the active current component and the reactive current component are accurately calculated through the formula.
Step S800: obtaining a first direct current component and a second direct current component according to the active current component and the reactive current component, wherein the first direct current component is the direct current component of the active current component, and the second direct current component is the direct current component of the reactive current component;
in this step, the first direct current component may be obtained by inputting the active current component to a low-pass filter, and the second direct current component may be obtained by inputting the reactive current component to a low-pass filter, wherein the low-pass filter may be a kalman filter or the like.
Step S900: performing inverse conversion on the first direct current component and the second direct current component to obtain three-phase fundamental wave current;
in this step, the first DC component and the second DC component are subjected to 2r-3 s And (5) reversely transforming to obtain three-phase fundamental wave current.
Step S110: obtaining harmonic current according to the three-phase current and the three-phase fundamental current;
it should be noted that, the harmonic current is calculated by the following formula:
i ah ＝i a -i af ，
i bh ＝i b -i bf ，
i ch ＝i c -i cf ，
wherein i is ah 、i bh And i ch Is harmonic current, i a 、i b And i c Is three-phase current, i af 、i bf And i cf Is a three-phase fundamental current.
In this step, the three-phase fundamental current is subtracted from the three-phase current to obtain a harmonic current.
Step S120: and injecting harmonic compensation current into the power grid, wherein the harmonic compensation current is equal to the harmonic current in amplitude and opposite in phase.
In this embodiment, by obtaining the three-phase voltage on the grid side of the tested power supply, extracting the positive sequence component in the three-phase voltage, obtaining the target phase according to the positive sequence component, avoiding the interference of the negative sequence component and the zero sequence component when the grid frequency drifts or the voltage is asymmetric, accurately obtaining the phase of the three-phase voltage, further accurately obtaining the harmonic current, and then injecting the harmonic compensation current into the grid to inhibit the harmonic. Compared with the traditional electric energy feedback type electronic load technology, the electronic load harmonic suppression method is good in harmonic suppression effect and avoids causing harmonic pollution of a power grid.
In addition, an embodiment of the application also discloses an energy feedback type electronic load, which comprises:
the input end of the load module is used for being connected with the output end of the tested power supply, and the input end of the tested power supply is connected with the power grid;
the output end of the load module is connected with the input end of the inversion module, and the output end of the inversion module is used for being connected with a power grid;
and the control module is used for inhibiting the harmonic wave through the electronic load harmonic wave inhibition method.
In this embodiment, by obtaining the three-phase voltage on the grid side of the tested power supply, extracting the positive sequence component in the three-phase voltage, obtaining the target phase according to the positive sequence component, avoiding the interference of the negative sequence component and the zero sequence component when the grid frequency drifts or the voltage is asymmetric, accurately obtaining the phase of the three-phase voltage, further accurately obtaining the harmonic current, and then injecting the harmonic compensation current into the grid to inhibit the harmonic. Compared with the traditional electric energy feedback type electronic load technology, the energy feedback type electronic load provided by the embodiment of the application has a good harmonic suppression effect and avoids causing harmonic pollution of a power grid.
According to an embodiment of the application, the power grid further comprises a filtering module, wherein the output end of the inversion module is connected with the input end of the filtering module, and the output end of the filtering module is connected with the power grid.
In addition, an embodiment of the application further discloses a computer readable storage medium, in which a program executable by a processor is stored, where the program executable by the processor is used to implement the electronic load harmonic suppression method as described above.
In this embodiment, by obtaining the three-phase voltage on the grid side of the tested power supply, extracting the positive sequence component in the three-phase voltage, obtaining the target phase according to the positive sequence component, avoiding the interference of the negative sequence component and the zero sequence component when the grid frequency drifts or the voltage is asymmetric, accurately obtaining the phase of the three-phase voltage, further accurately obtaining the harmonic current, and then injecting the harmonic compensation current into the grid to inhibit the harmonic. Compared with the traditional electric energy feedback type electronic load technology, the computer readable storage medium of the embodiment of the application has a good harmonic suppression effect and avoids causing harmonic pollution of a power grid.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.
Claims (8)
1. The electronic load harmonic suppression method is characterized by comprising the following steps:
obtaining three-phase current of a power grid;
converting the three-phase current into a two-phase current;
obtaining three-phase voltages of the power grid;
extracting a positive sequence component from the three-phase voltage; the positive sequence component is obtained by the following formula:
wherein u is ap U is the first phasor of the positive sequence component bp As the second phasor of the positive sequence component, u cp U is the third phasor of the positive sequence component a A phase A voltage which is the three-phase voltage, u b A B-phase voltage which is the three-phase voltage, u c A C-phase voltage which is the three-phase voltage, j being an imaginary part;
converting the positive sequence component into a first component and a second component in a two-phase stationary coordinate system;
obtaining a target phase according to the first component and the second component, wherein the target phase is the phase of the three-phase voltage; the target phase is obtained by the following formula:
θ＝arctan(tan(ωt))，
wherein ωt is the target phase, u α For the first component, u β For the second component, θ is an included angle between a synthesized vector and the two-phase stationary coordinate system, where the synthesized vector is obtained by synthesizing the first component and the second component in the two-phase stationary coordinate system;
obtaining an active current component and a reactive current component according to the target phase and the two-phase current;
obtaining a first direct current component and a second direct current component according to the active current component and the reactive current component, wherein the first direct current component is the direct current component of the active current component, and the second direct current component is the direct current component of the reactive current component;
performing inverse conversion on the first direct current component and the second direct current component to obtain three-phase fundamental wave current;
obtaining harmonic current according to the three-phase current and the three-phase fundamental current;
and injecting harmonic compensation current into the power grid, wherein the harmonic compensation current is equal to the harmonic current in amplitude and opposite in phase.
2. The method of electronic load harmonic suppression according to claim 1, wherein said converting the positive sequence component into a first component and a second component in a two-phase stationary coordinate system comprises:
and the positive sequence component is subjected to Clarke transformation to obtain the first component and the second component.
3. The method of electronic load harmonic suppression according to claim 1, wherein the two-phase current is obtained by the following formula:
wherein i is α And i β For the two-phase current, i a 、i b And i c For the three-phase current, C 32 Is a transformation matrix.
4. The electronic load harmonic suppression method of claim 3, wherein the active current component and the reactive current component are obtained by the following formula:
wherein i is p For the active current component, i q For the reactive current component ωt is the target phase i α And i β For the two-phase current.
5. The method of electronic load harmonic suppression according to claim 4, wherein the deriving harmonic currents from the three-phase currents and the three-phase fundamental current comprises:
subtracting the three-phase fundamental current from the three-phase current to obtain the harmonic current.
6. The energy-feedback type electronic load is characterized by comprising:
the input end of the load module is used for being connected with a tested power supply;
the output end of the load module is connected with the input end of the inversion module, and the output end of the inversion module is used for being connected with a power grid;
a control module that suppresses harmonics by an electronic load harmonic suppression method as claimed in any one of claims 1 to 5.
7. The energy fed electronic load of claim 6, wherein: the power grid comprises a power grid body, and is characterized by further comprising a filtering module, wherein the output end of the inversion module is connected with the input end of the filtering module, and the output end of the filtering module is connected with the power grid.
8. A computer-readable storage medium, in which a processor-executable program is stored, which when executed by a processor is adapted to carry out the electronic load harmonic suppression method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311053069.6A CN117060411B (en) | 2023-08-21 | 2023-08-21 | Electronic load harmonic suppression method, energy-feedback electronic load and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311053069.6A CN117060411B (en) | 2023-08-21 | 2023-08-21 | Electronic load harmonic suppression method, energy-feedback electronic load and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117060411A CN117060411A (en) | 2023-11-14 |
| CN117060411B true CN117060411B (en) | 2024-03-26 |
Family
ID=88665934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311053069.6A Active CN117060411B (en) | 2023-08-21 | 2023-08-21 | Electronic load harmonic suppression method, energy-feedback electronic load and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117060411B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900751A (en) * | 2009-06-01 | 2010-12-01 | 雷富特节能科技（上海）有限公司 | Detection method of real-time voltage vectors in energy feedback unit |
| CN106026097A (en) * | 2016-07-01 | 2016-10-12 | 上海应用技术学院 | Active power filter harmonic compensation method and system |
| CN109936169A (en) * | 2017-12-15 | 2019-06-25 | 台达电子企业管理（上海）有限公司 | Uneven and harmonic power distribution control method and device between shunt chopper |
| CN112698095A (en) * | 2021-01-22 | 2021-04-23 | 中南大学 | High-precision detection method for fundamental wave and arbitrary subharmonic |
| CN112803415A (en) * | 2021-01-18 | 2021-05-14 | 江苏金智科技股份有限公司 | Inversion grid-connected current harmonic suppression method based on power electronic load |
-
2023
- 2023-08-21 CN CN202311053069.6A patent/CN117060411B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900751A (en) * | 2009-06-01 | 2010-12-01 | 雷富特节能科技（上海）有限公司 | Detection method of real-time voltage vectors in energy feedback unit |
| CN106026097A (en) * | 2016-07-01 | 2016-10-12 | 上海应用技术学院 | Active power filter harmonic compensation method and system |
| CN109936169A (en) * | 2017-12-15 | 2019-06-25 | 台达电子企业管理（上海）有限公司 | Uneven and harmonic power distribution control method and device between shunt chopper |
| CN112803415A (en) * | 2021-01-18 | 2021-05-14 | 江苏金智科技股份有限公司 | Inversion grid-connected current harmonic suppression method based on power electronic load |
| CN112698095A (en) * | 2021-01-22 | 2021-04-23 | 中南大学 | High-precision detection method for fundamental wave and arbitrary subharmonic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117060411A (en) | 2023-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ledwich et al. | A flexible DSTATCOM operating in voltage or current control mode | |
| Hwang et al. | DC offset error compensation for synchronous reference frame PLL in single-phase grid-connected converters | |
| CN110045175B (en) | Voltage drop detection method for single-phase power distribution system | |
| Wang et al. | Self-commissioning of permanent magnet synchronous machine drives at standstill considering inverter nonlinearities | |
| Familiant et al. | New techniques for measuring impedance characteristics of three-phase AC power systems | |
| Li et al. | A novel time-domain current-detection algorithm for shunt active power filters | |
| Meersman et al. | Overview of PLL methods for distributed generation units | |
| Shen et al. | Design and implementation of three-phase AC impedance measurement unit (IMU) with series and shunt injection | |
| Bongiorno et al. | Effect of sampling frequency and harmonics on delay-based phase-sequence estimation method | |
| Xu et al. | Sliding mode observer for sensorless control of surface permanent magnet synchronous motor equipped with LC filter | |
| Nian et al. | Optimised parameter design of proportional integral and resonant current regulator for doubly fed induction generator during grid voltage distortion | |
| Chen et al. | Harmonic compensation and resonance damping for SAPF with selective closed‐loop regulation of terminal voltage | |
| Qi et al. | Robust power sharing control for parallel three-phase inverters against voltage measurement errors | |
| CN117060411B (en) | Electronic load harmonic suppression method, energy-feedback electronic load and storage medium | |
| Wu et al. | On the equilibrium points in three-phase PLL based on the d-axis voltage normalization | |
| Liu et al. | Robust current control scheme for single‐phase PWM rectifiers based on improved μ‐synthesis in electric locomotive | |
| CN112928939B (en) | I-type three-level neutral point potential balance control method based on secondary voltage injection | |
| Sevilmiş et al. | High-order delayed signal cancellation-based PLL under harmonically distorted grid voltages | |
| CN115480103A (en) | Power grid impedance detection method and grid-connected system | |
| EP3472906B1 (en) | Identification method for identifying a resonance of a power grid, and grid-connected unit | |
| D'Arco et al. | Harmonic compensation with active front-end converters based only on grid voltage measurements | |
| CN110988485B (en) | Impedance detection system and impedance detection method for direct-current micro-grid | |
| Pigazo et al. | $3\phi-3w $ Signal Model for Power System Harmonics and Unbalance Identification Using Kalman Filtering | |
| CN110011316B (en) | Energy control method based on instantaneous space vector and double P-Q theory | |
| Jung et al. | Improved grid-synchronization technique based on adaptive notch filter |
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 |