CN117713087A - Intelligent filtering system of active filter - Google Patents
Intelligent filtering system of active filter Download PDFInfo
- Publication number
- CN117713087A CN117713087A CN202311775199.0A CN202311775199A CN117713087A CN 117713087 A CN117713087 A CN 117713087A CN 202311775199 A CN202311775199 A CN 202311775199A CN 117713087 A CN117713087 A CN 117713087A
- Authority
- CN
- China
- Prior art keywords
- wave
- electric wave
- module
- active filter
- filtering system
- 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
- 238000001914 filtration Methods 0.000 title claims abstract description 81
- 230000003993 interaction Effects 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims description 40
- 238000004458 analytical method Methods 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 13
- 238000013507 mapping Methods 0.000 claims description 12
- 230000000007 visual effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 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
-
- 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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/02—Arrangements for reducing harmonics or ripples
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to an active filter, in particular to an intelligent filtering system of the active filter. The existing active filter is controlled by a circuit board, cannot change at any time, can only execute specific functions, can not timely acquire fault information when faults occur in the operation process, and cannot monitor the working process of the active filter and the interaction loss of the active filter and a user. The invention provides an intelligent filtering system of an active filter, which is characterized in that filtering operation is finished by setting the system, data processing is performed from the aspect of software, a fault self-checking module is arranged, and a user interaction module is arranged to send self-checking reports and operation information to a user by monitoring voltage and current fluctuation generated when current passes through each component, so that the operability, flexibility and stability of the active filter are improved, and the management and monitoring capability of the user on the intelligent filtering system of the active filter is improved.
Description
Technical Field
The invention relates to an active filter, in particular to an intelligent filtering system of the active filter.
Background
The active power filter is a novel special power harmonic treatment device which is manufactured by adopting a modern power electronic technology and a digital signal processing technology based on a high-speed DSP device. The circuit consists of two main parts, namely an instruction current operation circuit and a compensation current generation circuit. The command current operation circuit monitors the current in the circuit in real time, converts an analog current signal into a digital signal, sends the digital signal into a high-speed Digital Signal Processor (DSP) to process the signal, separates harmonic waves from fundamental waves, sends driving pulses to the compensation current generation circuit in the form of Pulse Width Modulation (PWM) signals, drives the IGBT or IPM power module, generates compensation current with the same amplitude and opposite polarity as the harmonic current of the power grid, and injects the compensation current into the power grid to compensate or counteract the harmonic current, and actively eliminates the power harmonic waves.
The existing active filter is controlled by a circuit, cannot change at any time, can only execute specific functions, can not timely acquire fault information when faults occur in the operation process, and cannot monitor the working process of the active filter and the interaction loss of the active filter and a user.
It is therefore desirable to develop an active filter intelligent filtering system that overcomes the shortcomings of the prior art.
Disclosure of Invention
(1) Technical problem to be solved
The invention aims to overcome the defects of low operability, incapability of timely acquiring working faults and incapability of monitoring in the prior art, and the technical problem to be solved by the invention is to provide an intelligent filtering system of an active filter.
(2) Technical proposal
In order to solve the technical problems, the invention provides an intelligent filtering system of an active filter, which comprises a filtering system, a current transformer, a current sensor and a voltage sensor, wherein the filtering system comprises the following modules:
the electric wave signal acquisition module is used for acquiring electric wave information in the power grid transmission line and drawing the electric wave information into a visible electric wave image;
the electric wave analysis module is used for analyzing the wave form of the electric wave image drawn by the electric wave signal acquisition module and calculating the harmonic wave in the circuit;
the data processing module calculates waveforms with opposite harmonic waves in the circuit and transmits calculation results to the control output module;
the control output module is used for sending out corresponding harmonic waves according to the information sent out by the data processing module to perform corresponding filtering operation;
the fault self-checking module is used for detecting the fault of the intelligent filtering system of the active filter, and reporting the fault through the user interaction module in time after the fault occurs;
and the user interaction module is used for providing interaction between a user and the intelligent filtering system of the active filter.
Further, the electric wave signal acquisition module is used for acquiring electric wave information in a power grid transmission line and drawing the electric wave information into a visual electric wave image, firstly, a current transformer is used for acquiring current on the power grid transmission line, harmonic waves in the current transmission process are acquired according to induction of the current, the electric wave is divided according to the frequency of 50Hz, and the harmonic wave signals in the current transmission process are drawn into the visual image.
Further, the wave analysis module is used for analyzing the wave form of the wave image drawn by the wave signal acquisition module, and the harmonic wave size in the circuit is accurately calculated by calculating the difference value between the wave image drawn by the wave signal acquisition module and the standard wave image.
Further, the electric wave analysis module calculates the harmonic wave in the circuit accurately by calculating the difference between the electric wave image drawn by the electric wave signal acquisition module and the standard electric wave image, and the specific steps are as follows:
b1, acquiring waveforms of the electric wave images drawn by the electric wave signal acquisition module;
b2, analyzing the waveform of the wave image drawn by the wave signal acquisition module and the ideal wave image, and observing the difference points in each wave band and the values corresponding to the difference points;
b3, traversing two images, recording the difference value between two wave images of a single wave band within the same 50Hz, using f1 (x) to represent the mapping of actual wave in the x wave band, and using f2 (x) to represent the mapping of ideal wave in the x wave band;
and B4, setting the difference value between the electric wave image drawn by the electric wave signal acquisition module and the standard electric wave image as a function, and using g (x) to represent the mapping difference value of the actual electric wave to the ideal electric wave in the x wave band, namely, g (x) =f1 (x) -f2 (x).
Further, the data processing module calculates a corresponding filtering signal of the harmonic wave in the power grid transmission line by processing the mapping difference g (x) of the actual electric wave to the ideal electric wave sent by the electric wave analysis module, and sends the filtering signal to the control output module.
Further, the data processing module calculates an opposite harmonic h (x) according to a harmonic g (x) algorithm sent by the electric wave analysis module, and the specific steps are as follows:
a1, acquiring a transmission waveform image of an ideal electric wave f2 (x) and an actual electric wave transmission image f1 (x);
a2, obtaining a mapping g (x) of actual electric waves sent by the electric wave analysis module to ideal electric waves;
a3, subtracting g (x) from the ideal filter f2 (x) to obtain h (x), namely h (x) =f2 (x) -g (x), wherein h (x) is the difference value of the actual electric wave signal subtracted from the actual electric wave to the ideal electric wave, and the difference value of h (x) to f2 (x) is the inverse of the difference value of the actual electric wave to the ideal electric wave in a single electric wave band of 50Hz, so that the h (x) and the actual electric wave signal can be mutually offset, namely 2 f2 (x) =h (x) +f1 (x), and the ideal electric wave is obtained;
a4, outputting the f1 (x) by the h (x), verifying the combination effect of the actual electric wave and the filtered signal, observing waveform characteristics of the actual electric wave transmission image f1 (x) and the ideal electric wave f2 (x) before and after filtering by using an oscilloscope, and transmitting the h (x) to the control output module when the waveform of the actual electric wave f1 (x) after filtering is close to the waveform of the ideal electric wave f2 (x) and shows that the calculation filtering is successful.
Further, the control output module is used for sending out corresponding electric waves according to the information sent by the data processing module and outputting the electric waves to the power grid transmission line, so that the electric waves sent by the data processing module and original harmonic waves in the power grid transmission line are mutually counteracted, and the filtering operation is completed.
Further, the fault self-checking module is used for detecting faults of the intelligent filtering system of the active filter, monitoring voltage and current fluctuation generated when current passes through each component through the current sensor and the voltage sensor, and reporting fault indication to a user through the user interaction module if the voltage or current value fluctuation exceeds a user preset value range.
Further, the user interaction module is configured to provide interaction between the user and the intelligent filtering system of the active filter, the intelligent filter may send a self-checking report and operation information to the user through the user interaction module, and the user may issue a command to the intelligent filtering system of the active filter through the user interaction module.
Further, the operation flow of the intelligent filtering system of the active filter comprises the following steps:
s1, acquiring electric wave information in a power grid transmission line by an electric wave signal acquisition module, and drawing the electric wave information into a visible electric wave image;
s2, the wave analysis module analyzes the wave form of the wave image drawn by the wave signal acquisition module and calculates the harmonic wave in the circuit;
s3, the data processing module calculates waveforms with opposite harmonic waves in the circuit and transmits calculation results to the control output module;
s4, controlling the output module to output harmonic waves according to the information sent by the data processing module, so that the filtering operation is completed in the circuit transmission process;
and when the steps are operated, simultaneously operating a fault self-checking module, detecting the fault of the intelligent filtering system of the active filter, and reporting the fault through a user interaction module in time after the fault occurs.
(3) Advantageous effects
According to the invention, the intelligent filtering system of the active filter is arranged to complete the filtering operation, and data processing is performed from the aspect of software, so that the calculation mode of the active filter is not limited and controlled, the active operation can be modified, and the operability and flexibility of the active filter are improved.
The invention is provided with the fault self-checking module, and the normal operation of the intelligent filtering system of the active filter is monitored by monitoring the voltage and current fluctuation generated when the current passes through each component through the current transformer, so that the stability of the intelligent filtering system of the active filter in the operation process is improved, fault information can be timely obtained when faults occur, and the increase of power loss caused by the faults is reduced.
The invention sets the user interaction module for providing interaction between the user and the intelligent filtering system of the active filter, the intelligent filter can send self-checking report and operation information to the user through the user interaction module, and meanwhile, the user can issue a command to the intelligent filtering system of the active filter through the user interaction module, thereby improving the management capability of the user to the intelligent filtering system of the active filter and being capable of monitoring the operation of the intelligent filtering system of the active filter.
Drawings
FIG. 1 is a schematic diagram of a system module according to the present invention.
FIG. 2 is a schematic diagram of the operation flow of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Examples
The invention provides an intelligent filtering system of an active filter, which is shown in fig. 1, and comprises a filtering system, a current transformer, a current sensor and a voltage sensor, wherein the filtering system comprises the following modules:
the electric wave signal acquisition module is used for acquiring electric wave information in the power grid transmission circuit and drawing the electric wave information into a visible electric wave image;
the electric wave analysis module is used for analyzing the wave form of the electric wave image drawn by the electric wave signal acquisition module and calculating the harmonic wave in the circuit;
the data processing module calculates waveforms with opposite harmonic waves in the circuit and transmits calculation results to the control output module;
the control output module is used for sending out corresponding harmonic waves according to the information sent out by the data processing module to perform corresponding filtering operation;
the fault self-checking module is used for detecting the fault of the intelligent filtering system of the active filter, and reporting the fault through the user interaction module in time after the fault occurs;
and the user interaction module is used for providing interaction between a user and the intelligent filtering system of the active filter.
The following is an operation flow of the intelligent filtering system of the active filter, as shown in fig. 2, and includes the following steps:
s1, acquiring electric wave information in a power grid transmission line by an electric wave signal acquisition module, and drawing the electric wave information into a visible electric wave image;
s2, the wave analysis module analyzes the wave form of the wave image drawn by the wave signal acquisition module and calculates the harmonic wave in the circuit;
s3, the data processing module calculates waveforms with opposite harmonic waves in the circuit and transmits calculation results to the control output module;
s4, controlling the output module to output harmonic waves according to the information sent by the data processing module, so that the filtering operation is completed in the circuit transmission process.
When the intelligent filtering system of the active filter starts to work, firstly, an electric wave signal acquisition module is controlled to acquire electric wave information in a power grid transmission line, electric waves are segmented according to 50Hz frequency and are drawn into visual electric wave images, the electric wave signal acquisition module firstly acquires current on the power grid transmission line by using a current transformer, harmonic waves in the current transmission process are acquired according to induction of the current, harmonic wave signals in the current transmission process are drawn into visual images, and the harmonic wave signal images in the circuit are sent to an electric wave analysis module for further processing.
The harmonic signals in the power grid transmission line are drawn into visual images, the visual images can be sent to staff for observation, so that the staff can monitor the occurrence of the signals in the circuit, and meanwhile, the process of analyzing the harmonic signals in the circuit by the electric wave analysis module can be more intuitively monitored by the images.
The wave analysis module analyzes the wave form of the wave image drawn by the wave signal acquisition module and calculates the harmonic wave in the circuit;
the wave analysis module receives the wave form of the wave image drawn by the wave signal acquisition module, and the harmonic wave size in the circuit is accurately calculated by calculating the difference value between the wave image drawn by the wave signal acquisition module and the standard wave image.
The specific steps of the wave analysis module for accurately calculating the harmonic wave in the circuit by using the difference value between the wave image drawn by the wave signal acquisition module and the standard wave image are as follows:
b1, acquiring waveforms of the electric wave images drawn by the electric wave signal acquisition module;
b2, analyzing the waveform of the wave image drawn by the wave signal acquisition module and the ideal wave image, and observing the difference points in each wave band and the values corresponding to the difference points;
b3, traversing two images, recording the difference value between two wave images of a single wave band within the same 50Hz, using f1 (x) to represent the value of an actual wave in the x wave band, and using f2 (x) to represent the value of an ideal wave in the x wave band;
and B4, setting the difference between the electric wave image drawn by the electric wave signal acquisition module and the standard electric wave image as a function, and using g (x) to represent the difference of the actual electric wave to the ideal electric wave in the x wave band, namely, g (x) =f1 (x) -f2 (x).
The specific numerical value of the harmonic wave is judged through the subtraction of the two mappings, the electric wave in the circuit can be processed very quickly, the extremely short calculation time provides a quick and accurate data source for the subsequent calculation of the harmonic wave, and the active filter can also process the harmonic wave filtering in the circuit quickly.
The data processing module calculates the waveform of the opposite harmonic wave in the power grid transmission line by processing the mapping difference value g (x) of the actual electric wave to the ideal electric wave sent by the electric wave analysis module, and sends the calculation result to the control output module, and calculates the opposite harmonic wave h (x) according to the algorithm of the harmonic wave g (x) sent by the electric wave analysis module, and the specific steps are as follows:
a1, acquiring a transmission waveform image of an ideal electric wave f2 (x) and an actual electric wave transmission image f1 (x);
a2, obtaining a difference value g (x) of actual electric waves sent by the electric wave analysis module to ideal electric waves;
a3, subtracting g (x) from the ideal filter f2 (x) to obtain h (x), wherein h (x) =f2 (x) -g (x) is the difference value of the actual electric wave signal minus the actual electric wave in a single electric wave band of 50Hz to the ideal electric wave, and the difference value of h (x) to f2 (x) is the inverse of the difference value of the actual electric wave to the ideal electric wave and can be mutually offset with the actual electric wave signal, namely 2 f2 (x) =h (x) +f1 (x), so that the ideal electric wave is obtained;
a4, outputting the f1 (x) by the h (x), verifying the combination effect of the actual electric wave and the filtered signal, observing waveform characteristics of the actual electric wave transmission image f1 (x) and the ideal electric wave f2 (x) before and after filtering by using an oscilloscope, and transmitting the h (x) to the control output module when the waveform of the actual electric wave f1 (x) after filtering is close to the waveform of the ideal electric wave f2 (x) and shows that the calculation filtering is successful.
The harmonic wave in the circuit can be timely processed through rapid subtraction operation, and meanwhile, the method comprises a verification step, so that whether the filtering operation has an ideal effect or not can be timely verified, the active filter can send out a correct filtering signal, and error operation is reduced.
The control output module is used for sending out corresponding harmonic waves according to the information sent out by the data processing module and outputting the harmonic waves to the power grid transmission line, so that the harmonic waves sent out by the data processing module and original harmonic waves in the power grid transmission line are mutually counteracted, and the filtering operation is completed.
And when the steps are operated, simultaneously operating a fault self-checking module, detecting the fault of the intelligent filtering system of the active filter, and reporting the fault through a user interaction module in time after the fault occurs.
The fault self-checking module is used for detecting faults of the intelligent filtering system of the active filter, monitoring voltage and current fluctuation generated when current passes through each component through the current sensor and the voltage sensor, and reporting fault indication to a user through the user interaction module if the voltage or current value fluctuation exceeds a user preset value range.
The stability of the intelligent filtering system of the active filter in the running process is improved, fault information can be timely obtained when faults occur, and the increase of power loss caused by the faults is reduced.
The user interaction module is used for providing interaction between a user and the intelligent filtering system of the active filter, the intelligent filter can send a self-checking report and operation information to the user through the user interaction module, and meanwhile, the user can issue a command to the intelligent filtering system of the active filter through the user interaction module. The management capability of a user on the intelligent filtering system of the active filter is improved, and the operation of the intelligent filtering system of the active filter can be monitored.
The foregoing examples have shown only the preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications, improvements and substitutions can be made by those skilled in the art without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The intelligent filtering system of the active filter is characterized by comprising a filtering system, a current transformer, a current sensor and a voltage sensor, wherein the filtering system comprises the following modules:
the electric wave signal acquisition module is used for acquiring electric wave information in the power grid transmission line and drawing the electric wave information into a visible electric wave image;
the electric wave analysis module is used for analyzing the wave form of the electric wave image drawn by the electric wave signal acquisition module and calculating the harmonic wave in the circuit;
the data processing module calculates waveforms with opposite harmonic waves in the circuit and transmits calculation results to the control output module;
the control output module is used for performing corresponding filtering operation according to the information sent by the data processing module;
the fault self-checking module is used for detecting the fault of the intelligent filtering system of the active filter, and reporting the fault through the user interaction module in time after the fault occurs;
and the user interaction module is used for providing interaction between a user and the intelligent filtering system of the active filter.
2. The intelligent filtering system of the active filter according to claim 1, wherein the electric wave signal acquisition module is used for acquiring electric wave information in a power grid transmission line and drawing the electric wave information into a visual electric wave image, firstly, a current transformer is used for acquiring current on the power grid transmission line, harmonic waves in a current transmission process are acquired according to induction of the current, the electric wave is divided according to a frequency of 50Hz, and a harmonic wave signal in the current transmission process is drawn into the visual image.
3. The intelligent filtering system of claim 1, wherein the wave analysis module is configured to analyze a waveform of the wave image drawn by the wave signal acquisition module, and calculate a harmonic size in the circuit by calculating a difference between the wave image drawn by the wave signal acquisition module and the standard wave image.
4. The intelligent filtering system of claim 3, wherein the wave analysis module uses the difference between the wave image drawn by the wave signal acquisition module and the standard wave image to accurately calculate the harmonic wave in the circuit, and the specific steps are as follows:
b1, acquiring waveforms of the electric wave images drawn by the electric wave signal acquisition module;
b2, analyzing the waveform of the wave image drawn by the wave signal acquisition module and the ideal wave image, and observing the difference points in each wave band and the values corresponding to the difference points;
b3, traversing two images, recording the difference value between two wave images of a single wave band within the same 50Hz, using f1 (x) to represent the mapping of actual wave in the x wave band, and using f2 (x) to represent the mapping of ideal wave in the x wave band;
and B4, setting the difference value between the electric wave image drawn by the electric wave signal acquisition module and the standard electric wave image as a function, and using g (x) to represent the mapping difference value of the actual electric wave to the ideal electric wave in the x wave band, namely, g (x) =f1 (x) -f2 (x).
5. The intelligent filtering system of an active filter according to claim 1, wherein the data processing module calculates a corresponding filtered signal of a harmonic wave in a transmission line of the power grid by processing a mapping difference g (x) between an actual electric wave and an ideal electric wave sent from the electric wave analysis module, and sends the filtered signal to the control output module.
6. The intelligent filtering system of claim 5, wherein the data processing module calculates the inverse harmonic h (x) according to the harmonic g (x) algorithm sent by the wave analysis module, and the specific steps are as follows:
a1, acquiring a transmission waveform image of an ideal electric wave f2 (x) and an actual electric wave transmission image f1 (x);
a2, obtaining a mapping difference value g (x) of the actual electric wave sent by the electric wave analysis module to the ideal electric wave;
a3, subtracting g (x) from the ideal filter f2 (x) to obtain h (x), wherein h (x) =f2 (x) -g (x) is the difference value of the actual electric wave signal minus the actual electric wave in a single electric wave band of 50Hz to the ideal electric wave, and the difference value of h (x) to f2 (x) is the inverse of the difference value of the actual electric wave to the ideal electric wave and can be mutually offset with the actual electric wave signal, namely 2 f2 (x) =h (x) +f1 (x), so that the ideal electric wave is obtained;
a4, outputting h (x) to f1 (x), verifying the combination effect of the actual electric wave and the filtering signal, and observing the actual electric wave transmission image f before and after filtering by using an oscilloscope 1 (x) And ideal electric wave f 2 (x) As the waveform characteristics of the filtered actual wave f 1 (x) Waveform near ideal wave f 2 (x) And the waveform represents that the calculation filtering is successful, and h (x) is transmitted to the control output module.
7. The intelligent filtering system of the active filter according to claim 1, wherein the control output module is configured to send out corresponding electric waves according to the information sent by the data processing module, and output the electric waves to the power grid transmission line, so that the electric waves sent by the data processing module and original harmonics in the power grid transmission line cancel each other, and the filtering operation is completed.
8. The intelligent filtering system of the active filter according to claim 1, wherein the fault self-checking module is configured to detect a fault of the intelligent filtering system of the active filter, monitor voltage and current fluctuations generated when a current passes through each component through the current sensor and the voltage sensor, and report a fault indication to a user through the user interaction module if the voltage or current value fluctuations exceed a user preset value range.
9. The intelligent filtering system of claim 1, wherein the user interaction module is configured to provide interaction between a user and the intelligent filtering system of the active filter, the intelligent filter can send a self-checking report and operation information to the user through the user interaction module, and the user can issue a command to the intelligent filtering system of the active filter through the user interaction module.
10. The intelligent active filter system according to claim 1, wherein the operation flow of the intelligent active filter system comprises the following steps:
s1, acquiring electric wave information in a power grid transmission line by an electric wave signal acquisition module, and drawing the electric wave information into a visible electric wave image;
s2, the wave analysis module analyzes the wave form of the wave image drawn by the wave signal acquisition module and calculates the harmonic wave in the circuit;
s3, the data processing module calculates waveforms with opposite harmonic waves in the circuit and transmits calculation results to the control output module;
s4, controlling the output module to output harmonic waves according to the information sent by the data processing module, so that the filtering operation is completed in the circuit transmission process;
and when the steps are operated, simultaneously operating a fault self-checking module, detecting the fault of the intelligent filtering system of the active filter, and reporting the fault through a user interaction module in time after the fault occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311775199.0A CN117713087B (en) | 2023-12-22 | 2023-12-22 | Intelligent filtering system of active filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311775199.0A CN117713087B (en) | 2023-12-22 | 2023-12-22 | Intelligent filtering system of active filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117713087A true CN117713087A (en) | 2024-03-15 |
| CN117713087B CN117713087B (en) | 2024-07-05 |
Family
ID=90151405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311775199.0A Active CN117713087B (en) | 2023-12-22 | 2023-12-22 | Intelligent filtering system of active filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117713087B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5567994A (en) * | 1995-09-29 | 1996-10-22 | Allen-Bradley Company, Inc. | Active harmonic filter with time domain analysis |
| JPH1141810A (en) * | 1997-07-17 | 1999-02-12 | Shizuki Denki Seisakusho:Kk | Signal detection circuit and active filter device |
| CN204615389U (en) * | 2015-04-28 | 2015-09-02 | 上海华艾软件股份有限公司 | Harmonic Protector with Wave Recording Function |
| CN107092213A (en) * | 2017-06-02 | 2017-08-25 | 北京英瑞来科技有限公司 | A kind of passive filtration unit and method that function is detected with fault electric arc |
| CN108828288A (en) * | 2018-04-10 | 2018-11-16 | 曲阜师范大学 | A kind of intelligence Active Power Filter-APF referential current detection system |
| CN110323756A (en) * | 2019-06-27 | 2019-10-11 | 浙江奔跑电器有限公司 | A kind of active power filter circuit can be used for harmonic compensation |
| CN111293697A (en) * | 2020-05-13 | 2020-06-16 | 能科科技股份有限公司 | Electric energy quality control system based on active filtering technology |
-
2023
- 2023-12-22 CN CN202311775199.0A patent/CN117713087B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5567994A (en) * | 1995-09-29 | 1996-10-22 | Allen-Bradley Company, Inc. | Active harmonic filter with time domain analysis |
| JPH1141810A (en) * | 1997-07-17 | 1999-02-12 | Shizuki Denki Seisakusho:Kk | Signal detection circuit and active filter device |
| CN204615389U (en) * | 2015-04-28 | 2015-09-02 | 上海华艾软件股份有限公司 | Harmonic Protector with Wave Recording Function |
| CN107092213A (en) * | 2017-06-02 | 2017-08-25 | 北京英瑞来科技有限公司 | A kind of passive filtration unit and method that function is detected with fault electric arc |
| CN108828288A (en) * | 2018-04-10 | 2018-11-16 | 曲阜师范大学 | A kind of intelligence Active Power Filter-APF referential current detection system |
| CN110323756A (en) * | 2019-06-27 | 2019-10-11 | 浙江奔跑电器有限公司 | A kind of active power filter circuit can be used for harmonic compensation |
| CN111293697A (en) * | 2020-05-13 | 2020-06-16 | 能科科技股份有限公司 | Electric energy quality control system based on active filtering technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117713087B (en) | 2024-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111766534B (en) | Traction converter ground fault detection method and device | |
| CN107449954A (en) | Power transformer iron core earth current holography on-Line Monitor Device and method | |
| CN111896224B (en) | Laser power supply loop performance detection device and method and terminal equipment | |
| CN114111657B (en) | A voltage-equalizing electrode scaling thickness detection system and operation method | |
| CN110165674B (en) | An Active Filter Safety Management System | |
| CN110285045B (en) | A nuclear power plant RCP main pump vibration phase monitoring system and method | |
| CN117713087B (en) | Intelligent filtering system of active filter | |
| CN117639072A (en) | A distributed power grid connection system | |
| CN117032055A (en) | Industrial equipment intelligent control system | |
| CN117129791A (en) | A power quality monitoring device on the distribution network side | |
| CN204085686U (en) | Power transformer inside loosens judgement system | |
| CN115436834A (en) | Embedded power supply abnormity detection method and system | |
| CN112736835B (en) | residual current protection device | |
| CN203012039U (en) | Online monitoring device for voltage limiter in series compensation capacitor | |
| CN117289022B (en) | A method and system for detecting harmonics in power grid based on Fourier algorithm | |
| CN118259144A (en) | Integrated measurement system for UHV DC circuit breakers | |
| CN109675983A (en) | A kind of device that bending machine pressure accurately controls | |
| CN104635140A (en) | Low-voltage active power filter testing device and testing method thereof | |
| CN104503336B (en) | Signal generator based on adaptive interface | |
| CN109358240B (en) | A data acquisition method for active power filter device in development process | |
| CN113536969A (en) | Defect diagnosis method and system for high-voltage reactor | |
| CN111505420A (en) | A method and system for online monitoring and diagnosis of line arrester status | |
| CN117826007B (en) | Ring network fault detection system and method for direct current system | |
| JP2009293931A (en) | Device and method for assessing effect of motor system in plant | |
| CN106526303B (en) | A kind of the C-V characteristic test device and method of solid decoupling device |
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 |