CN209134357U - A kind of tandem type photovoltaic battery plate blocks automatic checkout system - Google Patents
A kind of tandem type photovoltaic battery plate blocks automatic checkout system Download PDFInfo
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- CN209134357U CN209134357U CN201821753690.8U CN201821753690U CN209134357U CN 209134357 U CN209134357 U CN 209134357U CN 201821753690 U CN201821753690 U CN 201821753690U CN 209134357 U CN209134357 U CN 209134357U
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- photovoltaic battery
- battery plate
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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 utility model discloses a kind of tandem type photovoltaic battery plates to block automatic checkout system, including insertion control module, voltage measurement module Vsensor, voltage measurement module Vload, the program-controlled array that opens the light, N+1 block photovoltaic battery plate (M1 ... the M for producing electricl energyN+1) and load, N+1 block photovoltaic battery plate (M1 ... the M for power generationN+1) connected by concatenated mode, the Communications Control Interface of program controlled switch array is connected with the I/O of embedded type control module mouth, passes through the on-off of embedded type control module control switch.The program-controlled array that opens the light N-dimensional switch (1 ... N) respectively with N block photovoltaic battery plate (M1 ... MN) anode be connected.The utility model realizes the prediction of the piece number and shadow occlusion rate blocked to serial type photovoltaic battery plate by embedded control system to the voltage measurement of photovoltaic battery plate and matrix switch control, it realizes high discrimination, for a long time uninterrupted measurement, saves the cost of assessment photovoltaic battery plate circumstance of occlusion.
Description
Technical field
The utility model relates to photovoltaic arts, and in particular to a kind of tandem type photovoltaic battery plate blocks automatic checkout system.
Background technique
In photovoltaic system, the cloud that photovoltaic battery plate is often sailed, the shadow of close to buildings, trees or long-term accumulation
Dust blocked.Photovoltaic battery plate will have a direct impact on the output power of photovoltaic power supply system after being blocked.Photovoltaic battery plate is blocked
The case where can be gone with irradiance meter measure and assess, since irradiance meter cost a large amount of in practical application in industry is excessively high,
Therefore it is difficult to be applied.Document [1] identifies blocking for photovoltaic battery plate by the suddenly change of output power, this method is very
Difficulty goes to identify fast-changing climatic condition.Document [2] passes through the string voltage of measurement photovoltaic battery plate and each piece of photovoltaic battery plate
Voltage value and its relationship is analyzed to differentiate circumstance of occlusion, such method is needed using a large amount of voltmeter, can not be by reality
The photovoltaic generating system application on border.
[1]H.Zheng,S.Li,R.Challoo,and J.Proano.Shading and bypass diode
impacts to energy extraction of pv arrays under different converter configu-
rations.Renewable Energy,68:58–66,2014.
[2]J.Ma,Tianjiao Zhang,Yu Shi,Xingshuo Li,and Huiqin Wen.Shading
pattern detection using electrical characteristics of photovoltaic strings.In
2016IEEE International Conference on Power Electronics,Drives and En-ergy
Systems(PEDES),pages 1–4,Dec 2016.
Utility model content
The utility model aim is: the utility model proposes a kind of tandem type photovoltaic battery plates to block automatic checkout system,
The voltage measurement of photovoltaic battery plate and matrix switch control are realized and blocked to serial type photovoltaic battery plate by embedded control system
The prediction of the piece number and shadow occlusion rate, system can not only realize high discrimination, and each optical crosstalk volt battery plate only needs
The identification of shadow occlusion the piece number can be completed using 2 voltage acquisition modules and a switch matrix, and can be carried out
Uninterrupted measurement for a long time, is greatly saved the cost of assessment photovoltaic battery plate circumstance of occlusion.
The technical solution of the utility model is: a kind of tandem type photovoltaic battery plate blocks automatic checkout system, including insertion control
Molding block, voltage measurement module Vsensor, voltage measurement module Vload, program controlled switch array, the N+1 block light for producing electricl energy
Lie prostrate battery plate and load；
N+1 block photovoltaic battery plate for producing electricl energy is connected by concatenated mode, and N+1 block is successively marked by series sequence
Photovoltaic battery plate is M1、……、MN、MN+1, N >=2；Photovoltaic battery plate M1Negative terminal and photovoltaic battery plate MN+1Anode respectively with load phase
Connection, voltage measurement module VloadMeasurement anode and cathode respectively with photovoltaic battery plate M1Negative terminal and photovoltaic battery plate MN+1Just
End is connected, voltage measurement module VloadOther end interface with insertion control module be connected, voltage measurement module VsensorIt is negative
Pole and photovoltaic battery plate M1Negative terminal be connected, anode be connected with the switch input terminal of program controlled switch array, voltage measurement module Vsensor
Another end communication interface is connected with embedded type control module, and program controlled switch array is the single pole multiple throw of a N-dimensional, dimension
N can be arranged by embedded type control module, the Communications Control Interface of program controlled switch array and the I/O mouth of embedded type control module
It is connected, passes through the on-off of embedded type control module control switch；The N-dimensional switch of program controlled switch array is respectively and labeled as M1To MN
The anode of preceding N block photovoltaic battery plate be connected.
In one embodiment, the embedded type control module includes:
Voltage read module, for reading voltage measurement module VsensorWith voltage measurement module VloadVoltage value；
Analysis and processing module, to voltage measurement module VsensorWith voltage measurement module VloadVoltage value analysis processing after,
The switch of on-off program controlled switch array, and evaluate the photovoltaic not being blocked in the N+1 block photovoltaic battery plate that the string is working
The piece number N of battery plateinsolatedAnd the shielding rate χ of photovoltaic battery plate tandem.
The utility model has the advantages that: the utility model utilizes few voltmeter, can fast and accurately assess photovoltaic
Photovoltaic power generation system greatly reduces in the piece number and shielding rate that every a string of photovoltaic battery plate are blocked in electricity generation system, this method
The cost for fault diagnosis of uniting, and allow photovoltaic generating system that can be quickly found maximum power point in time.And this is practical new
The program controlled switch array of type is adaptable, and people can not only be allowed to enjoy generating high-quality electric power, can more protect environment, energy saving, this
Utility model can be widely applied to technical field of photovoltaic power generation.
Detailed description of the invention
The utility model is further described with reference to the accompanying drawings and embodiments:
Fig. 1 is that the utility model embodiment tandem type photovoltaic battery plate blocks automatic checkout system block diagram；
Fig. 2 is that the utility model embodiment tandem type photovoltaic battery plate blocks automatic checkout system low temperatures battery plate and blocks reality
Test schematic diagram；
Fig. 3 is that the utility model embodiment tandem type photovoltaic battery plate blocks automatic testing method flow chart.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
As shown in Figure 1, a kind of tandem type photovoltaic battery plate blocks automatic checkout system, including insertion control module, voltage are surveyed
Measure module Vsensor, voltage measurement module Vload, program controlled switch array, the N+1 block photovoltaic battery plate (M for producing electricl energy1…MN+1)
And load, the N+1 block photovoltaic battery plate (M for producing electricl energy1…MN+1) connected by concatenated mode, photovoltaic battery plate M1Negative terminal
With photovoltaic battery plate MN+1Anode be connected respectively with load, voltage measurement module VloadMeasurement anode and cathode respectively with
Photovoltaic battery plate M1Negative terminal and photovoltaic battery plate MN+1Anode be connected, for measuring photovoltaic battery plate (M1…MN+1) whole string voltage (i.e.
Load voltage), voltage measurement module VloadOther end interface with insertion control module be connected, the reading for load voltage
It takes and the measurement of voltmeter controls.Voltage measurement module VsensorCathode and photovoltaic battery plate M1Negative terminal be connected, anode with
The switch input terminal of program controlled switch array is connected, voltage measurement module VsensorIt shares with program controlled switch array junctions in measurement photovoltaic
Battery plate (M1…MN+1) substring voltage.Voltage measurement module VsensorAnother end communication interface is connected with embedded type control module
For photovoltaic battery plate (M1…MN+1) substring voltage.Program controlled switch array is the single pole multiple throw of a N-dimensional, and dimension N can be with
It is arranged by embedded type control module.The Communications Control Interface of program controlled switch array is connected with the I/O of embedded type control module mouth,
Pass through the on-off of embedded type control module control switch.Program controlled switch array N-dimensional switch (1 ... N) respectively with N block photovoltaic battery plate
(M1…MN) anode be connected.The embedded type control module includes: voltage read module, for reading voltage measurement module
VsensorWith voltage measurement module VloadVoltage value；Analysis and processing module, to voltage measurement module VsensorWith voltage measurement mould
Block VloadVoltage value analysis processing after, according to processing strategie to the switch of journey on-off program controlled switch array, and evaluate this
Photovoltaic battery plate (the M that string is working1…MN+1) in the piece number N of photovoltaic battery plate that is not blockedinsolatedAnd photovoltaic battery plate
The shielding rate χ of tandem.
The utility model also provides a kind of tandem type photovoltaic battery plate and blocks automatic testing method, includes the following steps:
S1: embedded type control module initializes system parameter: the piece number N for the photovoltaic battery plate not being blockedinsolatedIt is 0, quilt
Shielding rate χ is 0, remaining switch of the closure of switch 1 of control program controlled switch array is fully open, and being denoted as KeyIndex is 1, is read
Voltage measurement module VloadVoltage value Vload, setting variation reference voltage VstdEqual to VloadIf VloadGreater than VTHInto S2,
If VloadLess than VTH, then whole optical crosstalk volt battery plate is all blocked, NinsolatedEqual to 0, S1 is returned；
S2: embedded type control module reads voltage measurement module VsensorVoltage value Vsensor, read voltage measurement module
VloadVoltage value Vload, into S3；
S3: judge VsensorWith threshold voltage VTHRelationship, if VsensorGreater than VTH, the photovoltaic battery plate situation that is blocked comments
Estimate program and enters S5；If VsensorVoltage value be less than or equal to VTH, into S4；
S4: the relationship between the index code KeyIndex and N of program controlled switch array closure switch is judged, if KeyIndex
Less than N, the switch of program-controlled array switch disconnects current switch, and being closed next switch is that KeyIndex adds 1, into S2；If
KeyIndex is more than or equal to N, then only one piece of photovoltaic battery plate M1It can work normally, i.e. NinsolatedEqual to 1, VstdEqual to Vload
Subtract Vsensor, into S2；
S5: judge VsensorWith reference voltage VstdBetween relationship, if VsensorMore than or equal to Vstdβ times, then it represents that
There is variation in shadow occlusion situation, and system needs to rejudge after initializing, into S1, if VsensorLess than Vstdβ times,
Then determine the photovoltaic electric plate number not being blockedPhotovoltaic battery plate shielding rateInto S2；
Wherein, Vstd: whether reference voltage, the circumstance of occlusion for comparing photovoltaic battery plate have variation；
β: coefficient value is used to indicate the sensitivity for the case where photovoltaic battery plate changes, and recommending value is 2；
VTH: threshold voltage, for comparing whether photovoltaic battery plate blocks；General value is 1~2V；
KeyIndex: the index codes of program controlled switch array closure switch, such as KeyIndex=1, then program controlled switch array
Switch 1 is closed, and rest switch is fully open；
Ninsolated: the piece number for the photovoltaic battery plate not being blocked；
Vload: embedded type control module reads voltage measurement module VloadVoltage value；
Vsensor: embedded type control module reads voltage measurement module VsensorVoltage value；
χ: the shielding rate of photovoltaic battery plate tandem, range 0~100%.
Above-described embodiment further specifically, using 4 10W photovoltaic battery plate (M1-M4), the basic parameter of photovoltaic battery plate
(Isc=1.23A, Voc=10.71V) four photovoltaic battery plates are connected in series, the electronic load model used
(ITECH IT8512A), the embedded controller model UDOO NEO FULL that uses are opened using relay design
Matrix is closed, the voltage acquisition module of use is connected by RS485 bus with embedded controller, it tests at 31.2745 ° of latitude,
The position that 120.7383 ° of longitude carries out, and the time is about dusk 16:20, and air themperature is 31 degrees Celsius, and normal photovoltaic battery plate is received
To solar irradiance be about 600W/m2, the solar irradiance that the photovoltaic battery plate after being blocked receives is about 55W/m2, Electronic Negative
It carries and is arranged at 5000 ohm.
(1) static photovoltaic battery plate blocks test, to photovoltaic battery plate (M1-M4), the photovoltaic battery plate being blocked is indicated with " 1 ",
" 0 " indicates the photovoltaic battery plate not being blocked.As " 1000 " indicate photovoltaic battery plate M1It is blocked, remaining M2-M4It is not blocked.It is real
Test that the results are shown in Table 1, the experimental results showed that the utility model proposes system being capable of the photovoltaic electric that is not blocked of 100% identification
The piece number of plate.
The experimental result of 1 static barriers photovoltaic battery plate of table
(2) low temperatures battery plate blocks test, as shown in Fig. 2, dynamically being remembered using solid big GDS-2202A oscillograph
Record voltage acquisition module VloadWith voltage acquisition module VsensorVoltage value.The photovoltaic electric plate number N not being blockedinsolatedIt is logical
It crosses calculating to obtain, indicates the closed position of system program controlled switch array with the placement of voltmeter in Fig. 2.Test result shows T1
Moment M1-M4It is not blocked, i.e. NinsolatedEqual to 4, T2 moment NinsolatedEqual to the circumstance of occlusion of 3, T3 moment photovoltaic battery plate
It changes, that is, blocks the piece number increase and be automatically detected system identification, and measure the photovoltaic battery plate not being blocked with the T4 moment
The piece number is 2, and the circumstance of occlusion of T5 moment photovoltaic battery plate changes again, that is, the piece number blocked is reduced, and is recognized by the system,
And correctly having evaluated the photovoltaic battery plate not being blocked at the T6 moment is 3.Experiment shows that the system of the utility model can
Quickly correctly evaluate the piece number that each optical crosstalk volt battery plate is blocked.
The utility model can achieve the effect that:
(1) system uses program controlled switch array to control the connection relationship of voltage module, adapts to the measurement of voltage each
Kind situation, the photovoltaic battery plate for being satisfied with all kinds of photovoltaic systems block diagnosis.
(2) system can round-the-clock ground real-time monitoring and feedback, time of measuring is short, and precision is high.
(3) two voltmeters and a switch arrays are used, to measure the case where N+1 serial type photovoltaic battery plate blocks,
It cost saved the cost of commercial measurement, so that photovoltaic battery plate fault measuring cost is lower, it is more efficient.
It, can (such as cloud be sailed to fast-changing photovoltaic battery plate shadow occlusion situation using adaptive method
Situations such as), make in real time accurately judgement.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
People can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.It is all
According to the modification that the Spirit Essence of the utility model main technical schemes is done, should all cover in the protection scope of the utility model
Within.
Claims (2)
1. a kind of tandem type photovoltaic battery plate blocks automatic checkout system, which is characterized in that including being embedded in control module, voltage measurement
Module Vsensor, voltage measurement module Vload, program controlled switch array, the N+1 block photovoltaic battery plate for producing electricl energy and load；
The N+1 block photovoltaic battery plate for producing electricl energy is connected by concatenated mode, and N+1 block is successively marked by series sequence
Photovoltaic battery plate is M1、……、MN、MN+1, N >=2；Photovoltaic battery plate M1Negative terminal and photovoltaic battery plate MN+1Anode respectively with load phase
Connection；
The voltage measurement module VloadMeasurement anode and cathode respectively with photovoltaic battery plate M1Negative terminal and photovoltaic battery plate MN+1
Anode be connected, voltage measurement module VloadOther end interface with insertion control module be connected；
The voltage measurement module VsensorCathode and photovoltaic battery plate M1Negative terminal be connected, anode and the switch of program controlled switch array
Input terminal is connected, voltage measurement module VsensorAnother end communication interface is connected with embedded type control module；
The program controlled switch array is the single pole multiple throw of a N-dimensional, and dimension N can be arranged by embedded type control module,
The Communications Control Interface of program controlled switch array is connected with the I/O of embedded type control module mouth, is controlled by embedded type control module
It switches on-off；The N-dimensional switch of program controlled switch array is respectively and labeled as M1To MNThe anode of preceding N block photovoltaic battery plate be connected.
2. tandem type photovoltaic battery plate as described in claim 1 blocks automatic checkout system, which is characterized in that the embedded Control
Module includes:
Voltage read module, for reading voltage measurement module VsensorWith voltage measurement module VloadVoltage value；
Analysis and processing module, to voltage measurement module VsensorWith voltage measurement module VloadVoltage value analysis processing after, on-off
The switch of program controlled switch array, and evaluate the photovoltaic battery plate not being blocked in the N+1 block photovoltaic battery plate that the string is working
The piece number NinsolatedAnd the shielding rate χ of photovoltaic battery plate tandem.
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| CN109274332A (en) * | 2018-10-29 | 2019-01-25 | 西交利物浦大学 | A kind of tandem type photovoltaic battery plate blocks automatic checkout system and method |
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