CN113533823A - A multi-dimensional parallel photovoltaic string data acquisition system and method - Google Patents
A multi-dimensional parallel photovoltaic string data acquisition system and method Download PDFInfo
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- CN113533823A CN113533823A CN202110785702.5A CN202110785702A CN113533823A CN 113533823 A CN113533823 A CN 113533823A CN 202110785702 A CN202110785702 A CN 202110785702A CN 113533823 A CN113533823 A CN 113533823A
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- 238000012545 processing Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
- G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
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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
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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
本发明公开一种多维并联光伏组串数据采集系统和方法，系统包括：光伏组串、多维电流采集器、数据处理器、GPS对时模块及报警器；所述光伏组串为并联连接的光伏面板，光伏组串之间以并联或者串联方式形成光伏矩阵；多维电流采集器采集并联光伏面板上面并联的n个单位光伏面板的电流；多维电流采集器均与数据处理器连接。本发明系统仅需要通过采集每块光伏板的电流来掌握光伏板的运行状况，大幅度的降低了数据采集成本。
The invention discloses a multi-dimensional parallel photovoltaic string data acquisition system and method. The system comprises: photovoltaic strings, a multi-dimensional current collector, a data processor, a GPS timing module and an alarm; the photovoltaic strings are photovoltaic strings connected in parallel. A photovoltaic matrix is formed between the panels and photovoltaic strings in parallel or in series; the multi-dimensional current collector collects the current of n units of photovoltaic panels connected in parallel on the parallel photovoltaic panels; the multi-dimensional current collectors are all connected to the data processor. The system of the present invention only needs to grasp the operation status of the photovoltaic panels by collecting the current of each photovoltaic panel, which greatly reduces the cost of data acquisition.
Description
Technical Field
The invention relates to the technical field of photovoltaic module performance monitoring, in particular to a multi-dimensional parallel photovoltaic string data acquisition system and method.
Background
The photovoltaic module operation data is the part with the largest data volume in the photovoltaic power station and is the most missing part in the operation management data acquisition of the photovoltaic power station at present. Realizing big data analysis of photovoltaic power stations necessarily depends on component level digitization technology. The component level data acquisition technology is a component level optimizer scheme of low-distribution and low-cost versions, an existing optimizer is provided with an MPPT controller, but the cost is high, the power optimizing effect can be achieved only when faults such as shielding exist in a photovoltaic panel, certain electric quantity loss can be achieved when the photovoltaic module normally works, and the output power of the component is reduced.
Disclosure of Invention
In order to overcome the defect of complex photovoltaic acquisition in the prior art, the invention provides the multi-dimensional parallel photovoltaic string data acquisition system and the method thereof, because the voltage of each photovoltaic panel in the parallel photovoltaic string is the same, the system only needs to master the operation condition of the photovoltaic panel by acquiring the current of each photovoltaic panel in the parallel photovoltaic string, and the data acquisition cost is greatly reduced.
In order to achieve the above object, the present invention provides the following technical solutions.
A multi-dimensional parallel photovoltaic string data acquisition system, comprising: the photovoltaic string, the multidimensional current collector and the data processor are connected in parallel;
the photovoltaic array comprises a plurality of parallel photovoltaic array strings or a plurality of parallel photovoltaic array strings connected in parallel to form a photovoltaic matrix, wherein each parallel photovoltaic array string comprises n unit photovoltaic panels connected in parallel;
the multi-dimensional current collector is connected with n unit photovoltaic panels which are connected in parallel on the parallel photovoltaic group string and used for collecting current; and the multi-dimensional current collectors are all connected with the data processor.
As a further improvement of the invention, the multi-dimensional current collector comprises a current analog signal output module and a second current data collecting point, the first current data collecting point of the unit photovoltaic panel on each parallel photovoltaic group string is connected with the second current data collecting point of the multi-dimensional current collector, and the current analog signal output module is connected with the data processor.
As a further improvement of the invention, the first current data acquisition point is arranged at the positive pole or the negative pole of the unit photovoltaic panel.
As a further improvement of the invention, each parallel photovoltaic string is provided with m multidimensional current collectors, and m is more than or equal to 1 and less than or equal to n unit photovoltaic panels connected in parallel on the parallel photovoltaic string.
The number of the n parallel unit photovoltaic panels on the parallel photovoltaic group string is as follows: n is more than or equal to 1 and less than or equal to 50.
As a further improvement of the invention, the alarm device is also included and is connected with the data processor.
As a further improvement of the invention, the system also comprises a GPS satellite timing module which is connected with the data processor.
As a further improvement of the invention, the data processor comprises a data processing system and a cloud server, wherein the data processing system is used for summarizing data acquired by the multidimensional current collector, and the cloud server is used for storing and calculating.
A method for acquiring a multidimensional parallel photovoltaic string data acquisition system comprises the following steps:
the multi-dimensional current collector collects the current of n unit photovoltaic panels connected in parallel on the parallel photovoltaic group string, generates an analog signal and sends the analog signal to the data processor;
and the data processor performs analog analysis on the acquired current data and positions the position of the photovoltaic panel of the abnormal data unit.
The GPS satellite time setting module is used for providing time, and corresponding is carried out on the current data of each time point to obtain the relation between the time and the current data.
The alarm is used for alarming the abnormal unit photovoltaic panel judged by the data processor and displaying the serial number of the failed photovoltaic panel.
Compared with the prior art, the invention has the following beneficial effects:
the system of the invention acquires multi-dimensional data of the multi-photovoltaic panels in the transverse direction and the longitudinal direction through the multi-dimensional current collector to form a massive photovoltaic panel operation database, and accurately masters the operation state of each photovoltaic panel through calculation, comparison and analysis. The problems of the photovoltaic panel can be found in time, and the operation stability, safety and operation efficiency of the photovoltaic panel are improved. The data acquisition system only needs to master the operating conditions of the photovoltaic panels by acquiring the current of each photovoltaic panel, so that the data acquisition cost is greatly reduced.
The GPS satellite time setting module provides uniform and accurate time for all equipment to work in a matched mode, data of each time point are accurately collected, and safe operation of a photovoltaic power station is guaranteed.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art can, with the benefit of the teachings of this invention, select various possible shapes and proportional dimensions to achieve
Fig. 1 is a schematic structural diagram of a multi-dimensional parallel photovoltaic string data acquisition system according to the present invention.
Fig. 2 is a diagram of a data acquisition system of the present invention.
Fig. 3 is a current collector structure of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be described below in detail and completely with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a brand-new component data acquisition technology, in particular to a multi-channel potential acquisition technology based on a satellite synchronous clock. The idea of the technology is that only voltage data of the photovoltaic module needs to be additionally acquired because current data of the photovoltaic module is known (namely string current data). The voltage measurement can directly collect analog signals and intensively transmit the analog signals to multi-channel potential collection equipment for synchronous measurement.
As shown in fig. 1 and 2, a multidimensional parallel photovoltaic string data acquisition system of the present invention includes:
the photovoltaic power generation system comprises a photovoltaic set string 2, a multidimensional current collector 3 and a data processor 1 which are connected in parallel;
a plurality of parallel photovoltaic string 2 are connected in series or in parallel to form a photovoltaic matrix, and each parallel photovoltaic string 2 comprises n unit photovoltaic panels 5 connected in parallel;
a multidimensional current collector 3 is connected with n parallel unit photovoltaic panels 5 on the parallel photovoltaic string 2 for collecting current; the plurality of multi-dimensional current collectors 3 are each connected to the data processor 1.
The multidimensional current collector 3 consists of a current analog signal output module 7, a first current data collection point 8 and n second current data collection points 9. The n second current data acquisition points 9 of the current data acquisition points are respectively connected to each unit photovoltaic panel 5 connected in parallel on the parallel photovoltaic group string 2.
The parallel photovoltaic string 2 is formed by connecting m unit photovoltaic panels 5 in parallel and longitudinally installing together, and the m parallel photovoltaic strings 2 are transversely connected in series to form a string of photovoltaic strings. M is more than or equal to 1 and less than or equal to n unit photovoltaic panels 5 connected in parallel on the parallel photovoltaic string 2.
The number of n unit photovoltaic panels 5 connected in parallel above the parallel photovoltaic string 2: n is more than or equal to 1 and less than or equal to 50.
The multidimensional current collector 3 collects the current of n parallel unit photovoltaic panels 5 on the parallel photovoltaic string 2, generates an analog signal, and carries out multi-dimensional monitoring and data collection on the running condition of the parallel photovoltaic string 2.
The multidimensional current collector 3 is provided with current data collecting interfaces according to the number n of the parallel photovoltaic panels.
As shown in fig. 2 and 3, the multi-dimensional current collector 3 includes a current analog signal output module 7 and a second current data collection point 9, a first current data collection point 8 of each unit photovoltaic panel 5 on each parallel photovoltaic string 2 is connected to the second current data collection point 9 of the multi-dimensional current collector 3, and the current analog signal output module 7 is connected to the data processor 1.
Wherein the first current data collection point 8 is at the positive or negative pole of the unit photovoltaic panel 5. And each parallel photovoltaic string 2 is provided with a multi-dimensional current collector 3.
Preferably, the alarm device 4 is further included, and the alarm device 4 is connected with the data processor 1. Alarm 4 passes through analog signal, can show trouble photovoltaic board serial number.
Preferably, the system further comprises a GPS satellite time setting module 6, and the GPS satellite time setting module 6 is connected with the data processor 1. The GPS satellite time setting module 6 provides a uniform and accurate time for all equipment to work in a matching way, and accurately collects the data of each time point.
The data processor 1 comprises a data processing system and a cloud server, the data processing system is used for summarizing data collected by the multi-dimensional current collector 3, and the cloud server is used for storing the data. The data processor 1 carries out analog analysis on the acquired data and alarms through the alarm 4 for the point position deviating from the acquired data cluster.
The invention also provides an analysis method of the multi-dimensional parallel photovoltaic string data acquisition system, which comprises the following steps:
the multidimensional current collector 3 collects the current of n parallel unit photovoltaic panels 5 on the parallel photovoltaic string 2, generates an analog signal and sends the analog signal to the data processor 1;
the data processor 1 performs analog analysis on the acquired current data and positions the position of the abnormal data unit photovoltaic panel 5.
Further, the GPS satellite time setting module 6 provides time, and the current data of each time point is corresponded to obtain the relation between the time and the current data.
Further, the photovoltaic power generation system further comprises an alarm 4, wherein the alarm 4 gives an alarm for the unit photovoltaic panel 5 which is judged to be abnormal by the data processor 1 and displays the serial number of the failed photovoltaic panel.
The invention relates to a brand-new component data acquisition technology, in particular to a multi-channel potential acquisition technology based on a satellite synchronous clock. The idea of the technology is that since the voltage data of the parallel photovoltaic modules are known (i.e. the string voltage data), only the current data of the modules need to be additionally acquired. The current measurement can directly collect analog signals and transmit the analog signals to multi-channel potential collection equipment in a centralized manner for synchronous measurement.
The present invention will be described in detail with reference to the accompanying drawings.
The application method of the invention will now be described by taking a 300KW four-layer parallel photovoltaic power station multidimensional photovoltaic module data acquisition system as an example.
300 KW's power station is integrated by 1000 blocks of 0.8m 1.6 m's four layers of photovoltaic panel, four photovoltaic panels parallel connection of each row become parallelly connected photovoltaic group cluster, and then form the photovoltaic matrix with next row series connection, every photovoltaic matrix contains 20 rows of parallelly connected four photovoltaic panels, install 250 multidimension current collectors 3, carry out the current data acquisition of four dimensions to 4 parallelly connected unit photovoltaic panels 5 on the parallelly connected photovoltaic group cluster 2, join in marriage a data processor 1, an alarm 4, a GPS satellite module 6 of timing. The data processor 1 carries out big data analysis to the data of gathering, and when unit photovoltaic board produced sheltering from or the dysfunction, the electric current deviated photovoltaic board big data crowd, the alarm was reported to the police and is shown the photovoltaic board serial number, and fortune dimension personnel inspect fortune dimension to the photovoltaic board.
The invention has the beneficial effects that:
1) and multi-dimensional data acquisition is carried out on the transverse direction and the longitudinal direction of the multi-photovoltaic panel, and big data analysis simulation is carried out on the data of all the parallel photovoltaic strings 2 through comparison, so that the running state of each photovoltaic panel is accurately mastered. The photovoltaic panel deviating from the analog data is alarmed, the problems of the photovoltaic panel are found in time, and the operation stability, the safety and the operation efficiency of the photovoltaic panel are improved.
2) The GPS satellite time setting module 6 provides a uniform and accurate time for all equipment to work, and carries out accurate acquisition on data of each time point, so that the safe operation of a photovoltaic power station is guaranteed.
3) The data acquisition system only needs to master the operating conditions of the photovoltaic panels by acquiring the current of each photovoltaic panel, so that the data acquisition cost is greatly reduced.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is considered as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicant consider that such subject matter is not considered part of the disclosed subject matter.
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Cited By (1)
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