CN113466554A - Photovoltaic harmonic monitoring system based on electric energy metering chip - Google Patents
Photovoltaic harmonic monitoring system based on electric energy metering chip Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention belongs to the technical field of electric power, in particular to a photovoltaic harmonic monitoring system based on an electric energy metering chip, which aims at solving the problem that intelligent monitoring cannot be realized, and provides the following scheme, wherein the photovoltaic harmonic monitoring system comprises an electric signal acquisition unit, an inversion module signal acquisition unit and a peak-valley value storage unit, wherein the electric signal acquisition unit and the inversion module signal acquisition unit are both connected with a signal conditioning unit, the signal conditioning unit is connected with the electric energy metering chip, the electric energy metering chip is respectively connected with a register unit and a data processing unit, the data processing unit is respectively connected with the register unit and a circuit control unit, and the circuit control unit is connected with an alarm unit; the electric energy metering chip comprises an input port, an analog-to-digital conversion module, a digital processing module, an output port and a communication interface. The invention can realize real-time intelligent monitoring of the electric energy signal and the harmonic signal, and avoid circuit failure or influence on electric energy quality caused by non-timely processing of abnormal conditions.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to a photovoltaic harmonic monitoring system based on an electric energy metering chip.
Background
Harmonics are sub-components obtained by fourier series decomposition of a periodic non-sinusoidal alternating current, which are greater than an integral multiple of the frequency of a fundamental wave, and are generally called higher harmonics, while fundamental waves are components having the same frequency as the power frequency (50 Hz). The interference of higher harmonics is a big 'public nuisance' affecting the quality of electric energy in the current power system, and countermeasures are needed to be taken urgently. The process of photovoltaic power generation does not necessarily generate harmonic waves, but the process of power utilization certainly generates harmonic waves because direct current needs to be converted into alternating current through an inverter module, and the inverter module is a harmonic source.
The conventional photovoltaic power generation system cannot intelligently monitor harmonic waves generated in the power utilization process and real-time output electric energy, the electric energy quality can be influenced if the harmonic waves are too high, a circuit can be damaged if the electric energy is too high, and if the electric energy is too low, the power utilization standard of a subsequent electric appliance can not be met, a photovoltaic harmonic monitoring system is required to monitor the harmonic waves and the electric energy in real time and take corresponding measures.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a photovoltaic harmonic monitoring system based on an electric energy metering chip.
The invention provides a photovoltaic harmonic monitoring system based on an electric energy metering chip, which comprises an electric signal acquisition unit, an inversion module signal acquisition unit and a peak-valley value storage unit, wherein the electric signal acquisition unit and the inversion module signal acquisition unit are connected with a signal conditioning unit, the signal conditioning unit is connected with the electric energy metering chip, the electric energy metering chip is respectively connected with a registering unit and a data processing unit, the data processing unit is respectively connected with the registering unit and a circuit control unit, the circuit control unit is connected with an alarm unit, and the peak-valley value storage unit is connected with the data processing unit;
the electric signal acquisition unit is used for acquiring passing electric energy signals, the inversion module signal acquisition unit is used for acquiring harmonic signals generated by the inversion module, the peak-valley value storage unit is used for storing limited harmonic peak values and electric energy peak-valley values, the signal conditioning unit is used for conditioning and integrating the acquired electric energy signals and harmonic signals so as to facilitate subsequent further processing, the electric energy metering chip is used for converting the electric energy signals and the harmonic signals into corresponding metering values, the data processing unit is used for generating real-time variation curves of the electric energy and the harmonic wave number values and comparing the real-time variation curves with the limited values in the peak-valley value storage unit, the register unit is used for storing the real-time electric energy and the harmonic wave number values and the variation curves thereof, and the circuit control unit is used for controlling the circuit when the electric energy signals and the harmonic signals are abnormal, the alarm unit is used for alarming abnormal conditions;
the electric energy metering chip comprises an input port, an analog-to-digital conversion module, a digital processing module, an output port and a communication interface, wherein the input port is connected with the analog-to-digital conversion module, the analog-to-digital conversion module is connected with the digital processing module, the digital processing module is connected with the output port and the communication interface, and the data processing unit comprises a curve generation module and a data comparison module.
Preferably, the electrical signal acquisition unit comprises an electrical signal acquisition circuit, and the signal conditioning unit comprises a signal conditioning circuit.
Preferably, the register unit includes a register, and the data processing unit includes a data processor.
Preferably, the input port is configured to receive the electric energy signal and the harmonic signal output by the signal conditioning unit, and the analog-to-digital conversion module is configured to convert the electric energy signal and the harmonic signal into data that can be read by the digital processing module.
Preferably, the digital processing module is configured to calculate data to achieve measurement of electric energy and harmonic values, so that the electric energy signal and the harmonic signal are more visually embodied, and therefore subsequent monitoring of the electric energy value and the harmonic value is facilitated.
Preferably, the curve generating module is used for forming a corresponding change curve from the data converted by the electric energy metering chip and transmitting the change curve to the registering unit for storage, and the data comparing module is used for comparing the data converted by the electric energy metering chip with a limit value in the peak-valley value storage unit and taking corresponding measures according to a comparison result, so that real-time intelligent monitoring on the electric energy signal and the harmonic signal can be realized.
Preferably, the data processing unit extracts a limited harmonic peak value and a limited electric energy peak value from the peak-valley value storage unit, the data comparison module compares the data converted by the electric energy metering chip with the limited value in the peak-valley value storage unit, and when the electric energy is higher than the peak value or lower than the valley value or the harmonic value is higher than the peak value, the circuit control unit controls the circuit to be powered off, and the alarm unit alarms at the same time.
Preferably, alarm unit includes warning light and bee calling organ, the warning light has three kinds of colours, bee calling organ has three kinds of sounds, alarm unit lights the warning light of different colours and sounds different sounds according to the different situation that electric energy is higher than the peak value or is less than the valley value or harmonic numerical value is higher than the peak value when being higher than the peak value, reminds the staff to take corresponding measure according to the different situation to avoid abnormal conditions not in time handling and lead to circuit fault or influence electric energy quality.
The beneficial effects of the invention are as follows:
1. according to the photovoltaic harmonic monitoring system based on the electric energy metering chip, the electric energy signal and the harmonic signal are converted into data which can be read by the digital processing module through the analog-to-digital conversion module, and the digital processing module calculates the data to realize the metering of the electric energy and the harmonic value, so that the electric energy signal and the harmonic signal are more vividly embodied, and the follow-up monitoring of the electric energy value and the harmonic value is facilitated.
2. This photovoltaic harmonic monitoring system based on electric energy measurement chip through being provided with data processing unit and peak-valley value storage unit, and the data processing unit draws limited harmonic peak value and electric energy peak-valley value from peak-valley value storage unit in, and data contrast module compares the data of electric energy measurement chip conversion and the limit value in the peak-valley value storage unit, takes corresponding measure according to the comparison result to can realize the real-time intelligent monitoring to electric energy signal and harmonic signal.
3. This photovoltaic harmonic monitoring system based on electric energy measurement chip, through being provided with circuit control unit and alarm unit, when the electric energy is higher than the peak value or is less than the valley value or when the harmonic numerical value is higher than the peak value, circuit control unit control circuit outage, alarm unit lights the warning light of different colours and sounds different sound according to the different situation, reminds the staff to take corresponding measure according to the different situations, thereby avoid abnormal situation not in time handle and lead to circuit fault or influence electric energy quality.
The system has the advantages that the parts which are not involved are the same as or can be realized by the prior art, the system enables the electric energy signals and the harmonic signals to be more vividly embodied, so that the follow-up monitoring of the electric energy values and the harmonic numerical values is facilitated, the real-time intelligent monitoring of the electric energy signals and the harmonic signals can be realized, and the circuit fault or the influence on the electric energy quality caused by the untimely processing of abnormal conditions is avoided.
Drawings
Fig. 1 is a system diagram of a photovoltaic harmonic monitoring system based on an electric energy metering chip according to the present invention;
FIG. 2 is a system diagram of an electric energy metering chip of a photovoltaic harmonic monitoring system based on the electric energy metering chip according to the present invention;
fig. 3 is a system diagram of a data processing unit of a photovoltaic harmonic monitoring system based on an electric energy metering chip according to 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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-3, a photovoltaic harmonic monitoring system based on an electric energy metering chip comprises an electric signal acquisition unit, an inversion module signal acquisition unit and a peak-valley value storage unit, wherein the electric signal acquisition unit and the inversion module signal acquisition unit are connected with a signal conditioning unit, the signal conditioning unit is connected with the electric energy metering chip, the electric energy metering chip is respectively connected with a registering unit and a data processing unit, the data processing unit is respectively connected with the registering unit and a circuit control unit, the circuit control unit is connected with an alarm unit, and the peak-valley value storage unit is connected with the data processing unit;
the electric signal acquisition unit is used for acquiring passed electric energy signals, the inversion module signal acquisition unit is used for acquiring harmonic signals generated by the inversion module, the peak-valley value storage unit is used for storing limited harmonic peak values and electric energy peak-valley values, the signal conditioning unit is used for conditioning and integrating the acquired electric energy signals and harmonic signals so as to facilitate subsequent further processing, the electric energy metering chip is used for converting the electric energy signals and the harmonic signals into corresponding metering values, the data processing unit is used for generating real-time change curves of the electric energy and the harmonic wave number values and comparing the real-time change curves with the limited values in the peak-valley value storage unit, the register unit is used for storing the real-time electric energy and the harmonic wave number values and the change curves thereof, the circuit control unit is used for controlling the circuit when the electric energy signals and the harmonic signals are abnormal, and the alarm unit is used for alarming abnormal conditions;
the electric energy metering chip comprises an input port, an analog-to-digital conversion module, a digital processing module, an output port and a communication interface, wherein the input port is connected with the analog-to-digital conversion module, the analog-to-digital conversion module is connected with the digital processing module, the digital processing module is connected with the output port and the communication interface, and the data processing unit comprises a curve generation module and a data comparison module.
In the invention, the electric signal acquisition unit comprises an electric signal acquisition circuit, and the signal conditioning unit comprises a signal conditioning circuit.
In the invention, the register unit comprises a register, and the data processing unit comprises a data processor.
In the invention, the input port is used for receiving the electric energy signal and the harmonic signal output by the signal conditioning unit, and the analog-to-digital conversion module is used for converting the electric energy signal and the harmonic signal into data which can be read by the digital processing module.
In the invention, the digital processing module is used for calculating data to realize the measurement of electric energy and harmonic numerical values and enable electric energy signals and harmonic signals to be more vividly embodied, thereby facilitating the subsequent monitoring of the electric energy values and the harmonic numerical values, the output port and the communication interface are used for the transmission of the numerical values, the output port is connected with the register unit, and the communication interface is connected with the data processing unit.
In the invention, the curve generation module is used for forming a corresponding change curve by the data converted by the electric energy metering chip and transmitting the change curve to the register unit for storage, the data comparison module is used for comparing the data converted by the electric energy metering chip with the limit value in the peak-valley value storage unit, and corresponding measures are taken according to the comparison result, thereby realizing the real-time intelligent monitoring of the electric energy signal and the harmonic signal.
In the invention, the data processing unit extracts the limited harmonic peak value and the limited electric energy peak value from the peak-valley value storage unit, the data comparison module compares the data converted by the electric energy metering chip with the limited value in the peak-valley value storage unit, when the electric energy is higher than the peak value or lower than the valley value or the harmonic value is higher than the peak value, the circuit control unit controls the circuit to be powered off, and the alarm unit alarms at the same time.
According to the invention, the alarm unit comprises the alarm lamp and the buzzer, the alarm lamp has three colors, the buzzer has three sounds, and the alarm unit lights the alarm lamps with different colors and sounds according to different conditions that the electric energy is higher than a peak value or lower than a valley value or the harmonic wave value is higher than the peak value, so as to remind a worker to take corresponding measures according to different conditions, thereby avoiding circuit faults or influence on the electric energy quality caused by untimely processing of abnormal conditions.
The working principle is as follows: the electric signal acquisition unit acquires passed electric energy signals, the inversion module signal acquisition unit acquires harmonic signals generated by the inversion module, the signal conditioning unit conditions and integrates the acquired electric energy signals and harmonic signals to facilitate subsequent further processing, the input port of the electric energy metering chip receives the electric energy signals and the harmonic signals output by the signal conditioning unit, the analog-to-digital conversion module converts the electric energy signals and the harmonic signals into data which can be read by the digital processing module, the digital processing module calculates the data to achieve the measurement of the electric energy and the harmonic values, so that the electric energy signals and the harmonic signals are more vivid and concrete, the subsequent monitoring of the electric energy values and the harmonic values is facilitated, the output port transmits the values to the register unit for storage, the communication interface transmits the values to the data processing unit for subsequent processing, the data processing unit curve generation module forms corresponding change curves of the data converted by the electric energy metering chip and transmits the change curves to the register unit The storage unit stores, the data processing unit extracts limited harmonic peak value and electric energy peak value valley value from the peak-valley value storage unit, the data comparison module compares the data converted by the electric energy metering chip with the limited value in the peak-valley value storage unit, corresponding measures are taken according to the comparison result, thereby realizing real-time intelligent monitoring on electric energy signals and harmonic signals, when the electric energy is higher than the peak value or lower than the valley value or the harmonic value is higher than the peak value, the circuit control unit controls the circuit to be powered off, the alarm unit lights up warning lamps of different colors and sounds different sounds according to different conditions, reminds workers to take corresponding measures according to different conditions, thereby avoiding abnormal conditions from not processing in time to cause circuit faults or influence the electric energy quality.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A photovoltaic harmonic monitoring system based on an electric energy metering chip comprises an electric signal acquisition unit, an inversion module signal acquisition unit and a peak-valley value storage unit, and is characterized in that the electric signal acquisition unit and the inversion module signal acquisition unit are connected with a signal conditioning unit, the signal conditioning unit is connected with the electric energy metering chip, the electric energy metering chip is respectively connected with a registering unit and a data processing unit, the data processing unit is respectively connected with the registering unit and a circuit control unit, the circuit control unit is connected with an alarm unit, and the peak-valley value storage unit is connected with the data processing unit;
the electric signal acquisition unit is used for acquiring passing electric energy signals, the inversion module signal acquisition unit is used for acquiring harmonic signals generated by the inversion module, the peak-valley value storage unit is used for storing limited harmonic peak values and electric energy peak-valley values, the signal conditioning unit is used for conditioning and integrating the acquired electric energy signals and harmonic signals so as to facilitate subsequent further processing, the electric energy metering chip is used for converting the electric energy signals and the harmonic signals into corresponding metering values, the data processing unit is used for generating real-time variation curves of the electric energy and the harmonic wave number values and comparing the real-time variation curves with the limited values in the peak-valley value storage unit, the register unit is used for storing the real-time electric energy and the harmonic wave number values and the variation curves thereof, and the circuit control unit is used for controlling the circuit when the electric energy signals and the harmonic signals are abnormal, the alarm unit is used for alarming abnormal conditions;
the electric energy metering chip comprises an input port, an analog-to-digital conversion module, a digital processing module, an output port and a communication interface, wherein the input port is connected with the analog-to-digital conversion module, the analog-to-digital conversion module is connected with the digital processing module, the digital processing module is connected with the output port and the communication interface, and the data processing unit comprises a curve generation module and a data comparison module.
2. The photovoltaic harmonic monitoring system based on the electric energy metering chip as claimed in claim 1, wherein the electric signal acquisition unit comprises an electric signal acquisition circuit, and the signal conditioning unit comprises a signal conditioning circuit.
3. The photovoltaic harmonic monitoring system based on the electric energy metering chip is characterized in that the register unit comprises a register, and the data processing unit comprises a data processor.
4. The photovoltaic harmonic monitoring system based on the electric energy metering chip as claimed in claim 1, wherein the input port is configured to receive the electric energy signal and the harmonic signal output by the signal conditioning unit, and the analog-to-digital conversion module is configured to convert the electric energy signal and the harmonic signal into data readable by the digital processing module.
5. The photovoltaic harmonic monitoring system based on the electric energy metering chip is characterized in that the digital processing module is used for calculating data to realize the metering of electric energy and harmonic numerical values, the output port and the communication interface are used for transmitting numerical values, the output port is connected with the registering unit, and the communication interface is connected with the data processing unit.
6. The photovoltaic harmonic monitoring system based on the electric energy metering chip as claimed in claim 1, wherein the curve generating module is configured to form a corresponding variation curve from the data converted by the electric energy metering chip and transmit the variation curve to the register unit for storage, and the data comparing module is configured to compare the data converted by the electric energy metering chip with a limit value in the peak-to-valley value storage unit.
7. The photovoltaic harmonic monitoring system based on the electric energy metering chip as claimed in claim 6, wherein the data processing unit extracts the limited harmonic peak value and the limited electric energy peak value from the peak-valley value storage unit, the data comparison module compares the converted data of the electric energy metering chip with the limited value in the peak-valley value storage unit, when the electric energy is higher than the peak value or lower than the valley value or the harmonic value is higher than the peak value, the circuit control unit controls the circuit to be powered off, and the alarm unit gives an alarm at the same time.
8. The photovoltaic harmonic monitoring system based on the electric energy metering chip as claimed in claim 7, wherein the alarm unit comprises a warning lamp and a buzzer, the warning lamp has three colors, the buzzer has three sounds, and the alarm unit lights up the warning lamp with different colors and sounds different sounds according to different situations that the electric energy is higher than a peak value or lower than a valley value or the harmonic value is higher than the peak value, so as to remind a worker to take corresponding measures according to different situations.
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Application publication date: 20211001 |