EP4454122A1 - Procede et dispositif de suivi de point de puissance maximale et de surveillance de degradation d'un module photovoltaique - Google Patents
Procede et dispositif de suivi de point de puissance maximale et de surveillance de degradation d'un module photovoltaiqueInfo
- Publication number
- EP4454122A1 EP4454122A1 EP22835075.7A EP22835075A EP4454122A1 EP 4454122 A1 EP4454122 A1 EP 4454122A1 EP 22835075 A EP22835075 A EP 22835075A EP 4454122 A1 EP4454122 A1 EP 4454122A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- degradation
- module
- parameters
- monitoring
- mpp
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
Definitions
- This disclosure relates to the field of the management and operation of photovoltaic modules such as panels or sets of photovoltaic panels.
- MPPT Maximum Power Point Tracker For single-junction or multi-junction photovoltaic modules. These MPPT devices are used on photovoltaic installations such as a solar farm, on roofs or others. They are suitable for monofacial or bifacial photovoltaic modules in particular.
- silicon cells are a mature technology which has benefited from decades of research to increase its reliability.
- Such cells can however now be associated with perovskite cells, for which one of the challenges remains the stability over time of the materials constituting them. It is therefore necessary to be able to follow their degradation and know the causes of this degradation and their distribution over time and frequency.
- This disclosure improves the situation and makes it possible to find the causes of reduced module yield and to improve the monitoring of the performance and degradation of such photovoltaic modules.
- the present disclosure relates to a method for monitoring the maximum power point of at least one photovoltaic module, comprising, according to a periodicity 8t 0 , measurements of the operating point l/V of said module and of the positionings of said operating point at its maximum power point MPP, and which comprises monitoring of the degradation of said module, said monitoring comprising:
- steps for measuring the parameters I and V of said module for voltage-shifted points V PP+O and VMPP-P on the curve l(V) with respect to the maximum power point MPP steps for measuring the parameters I and V of said module for voltage-shifted points V PP+O and VMPP-P on the curve l(V) with respect to the maximum power point MPP, a calculation of the slope dl/dV+ at the point VMPP+O and of the slope dl/dV- at the point VMPP-P and storage of said data as well as the MPP,
- n 2 5t 0 with n 2 steps for measuring values of I and V by scanning the curve l(V) and calculating parameters (Jsc; Voc; FF; Rs; Rsh; I0; n ) of the module and storage of said parameters and values,
- the parameters measured during a life period of the monitored module(s) make it possible, by comparison with degradation models, to determine the type of degradation in progress and to inform the operators of the status of these modules. .
- the method may comprise a modification of the values of and/or of n 2 throughout said monitoring.
- the values of and/or of n 2 are reduced during the detection of a degradation and for which, in the absence of detection of the evolution of the degradation, the values of n1 and/or of n2 are increased with each loop of the algorithm.
- the method may include one or more steps for selecting said data, parameters and values, to keep said data, parameters and values corresponding to meteorological conditions set by the user.
- At least some of the p parameters may come from a calculation of the ratio of the time integral of the power at MPP by the product of the efficiency by the time integral of the irradiance perceived according to daily cycles.
- At least some of the calculation, drawing and display steps include a drawing of curves of the slope dl/dV ⁇ as a function of the slope dl/dV+ for the points measured along said measurement steps.
- the method may include a step of searching for degradation of the module and, in the event of degradation, a step of searching for a cause of degradation, for which said search is done by comparing the deviation of a set of curves modeled for different degradation modes with a curve obtained by the measurements.
- the method may include a step for displaying the cause of degradation.
- the method may include the comparison of one or more measured parameter curves with a degradation limit indicator beyond which an anomaly detection alert is sent to an operator.
- the present disclosure further relates to a device for monitoring the maximum power point of a photovoltaic module comprising a box provided with a display screen and a processor and configured to implement the disclosed method and display the curves obtained.
- Said box is inserted between one or more modules and a direct current / alternating current converter.
- Said box may comprise a communication module with external link to a remote computer of a monitoring system configured to program in particular in the digital processor the types of measurements and the periodicity of these measurements or to recover measurement data made by said box and to transmit to an operator information on the status of the modules and alerts on the detection of anomalies.
- the present disclosure also relates to a computer program comprising instructions for implementing the method described above when this program is executed by a digital processor.
- the present disclosure finally relates to a non-transitory recording medium readable by a computer on which is recorded a program for the implementation of the method when this program is executed by a digital processor.
- FIG. 1 represents a traditional J(V) curve of a photovoltaic cell
- FIG. 2 represents the curve of FIG. 1 with measurement points according to an aspect of the present disclosure.
- FIG. 3 shows a flowchart describing steps of embodiments of the present disclosure.
- FIG. 4 represents theoretical degradation curves according to several degradation mechanisms and a degradation curve measured for a module
- FIG. 5 represents an embodiment of a box for implementing the method of the present disclosure. Description of embodiments
- MPPT-DM Maximum Power Point Tracking with Degradation Monitoring in English
- MPPT-DM Maximum Power Point Tracking with Degradation Monitoring in English
- MPPT maximum power point tracking devices are conventionally used to continuously search for the optimal operating point of the module, making it possible to maximize energy production.
- curve 1 of FIG. 1 represents the current density J 2 , a function of the voltage V 3 of a cell.
- the tracking devices continuously seek to maintain power at the maximum power point MPP for the cells and for the modules. It is also known in an equivalent manner to use the current/voltage curve of a module to perform the MPP tracking function and in the case of the tracking of a module or several modules, according to the present disclosure the current/voltage curve l(V) is used for the calculations.
- the monitoring device of the present invention is itself designed both to obtain the MPP and also to regularly analyze the evolution of various electrical parameters associated with the current-voltage characteristic of the modules.
- the module will be controlled in a specific way through its monitoring device in order to recover the parameters in terms of current-voltage necessary to identify the current degradation path and the underlying mechanisms.
- These parameters are measured by specific scanning of the current-voltage characteristic at defined instants in the life of the module and make it possible to deduce, by comparison with modeled data from this same module, the degradation paths as well as their causes in terms of mechanism To do this, this disclosure proposes a specific tracking device control algorithm (or MPP tracker in English) for photovoltaic module.
- the tracking device performs measurements around the MPP in order to track this point of maximum power continuously and to maximize the power produced. .
- a first measurement is made by shifting the operating point of the cell to a voltage VMPP-O, for example VMPP - 50 mV at point 5 and to VMPP+P for example VMPP + 50 mV at point 6 which gives respectively the tangent slope 7 dJ/dV- for the point at VMPP - 50 mV and the tangent slope 8 dJ/dV-i- for the point at V PP + 50 mV.
- This interval around the maximum power point can be adjusted for a given photovoltaic installation, depending on the module technology.
- points at VMPP - 100 mV and at VMPP + 50 mV or points at VMPP - 100 mV and at VMPP + 100 mV can be chosen.
- the measurements are made on the curve l(V), with V, module voltage and I module current, a homothetic curve of the J(V) curve for which V is the cell voltage and J is the cell current density.
- VMPP, a and p will be adapted to the number of cells put in series.
- ⁇ 2 n 2 ⁇ 0 »6 ⁇ , chosen so as to have a slight impact on the electricity production, for example such that the measurements are made once a day or less, a plus a large number of points of the current-voltage curve are acquired on the l(V) curve, possibly with points distributed over the entire voltage range [0;Voc], in order to generate sufficient information to allow obtaining the parameters Jsc: Short-circuit current density (or short-circuit current for several cells), Voc: open circuit voltage, FF: form factor describing the shape of the curve.
- Jsc Short-circuit current density (or short-circuit current for several cells)
- Voc open circuit voltage
- FF form factor describing the shape of the curve.
- the collected data may optionally be subjected to pre-processing, to select those that have been measured under meteorological conditions set by the user (temperature, irradiance, etc.). For example, only measurements taken under conditions close to standard STC data (1000 W.m-2, 25°C) can be extracted.
- This second method for which no prior selection of data is necessary, consists in calculating for each daily cycle the ratio of the time integral of the power at MPP by the product of the efficiency by the time integral of the irradiance perceived.
- the acquired data can be compared with simulation results, which allow, knowing the characteristics of the module (spectral response, electrical, optical and thermal behavior), and using physical models called drift-diffusion , to determine the behavior in the case of the presence of different degradation mechanisms.
- a finer optimization of this analysis can be performed by playing for example on a, p, or ot 2 .
- the previously developed procedure is summarized in figure 3.
- steps 100 and 110 the traditional operating point and MPP positioning measurements are performed.
- a measurement 130 of the parameters I and V and dl/dV is carried out for points shifted to VMPP-O and VMPP+P on the curve l(V) above above and below MPP point and MPP data; dl/dV+; dl/dV- are stored in step 140.
- performance and degradation indicator the following data: Efficiency, Jsc, Voc, Impp, Vmpp, FF, Rs, Rsh, dl/dV+, dl/dV-, and for “meteorological data” the following data via the use within the system of dedicated meteorological sensors: humidity, ambient and module temperature, wind speed, pressure, UV index, Irradiance.
- the process is repeated by resetting the time counter to zero and by fixing the values of and of n 2 .
- the values of and/or of n 2 can be modified throughout said monitoring to take account of any degradation of the panel to be monitored. These values can in particular be reduced during the detection of a degradation or increased in the absence of detection of evolution of the degradation. The values of and/or of n 2 can in particular change at each loop of the algorithm.
- the data values are selected at step 190, for example to keep the measurements corresponding to fixed meteorological conditions, then data curves (up to P our P measured parameters) are plotted with superposition of measured and calculated data to compare the characteristics of the module in real time with the theoretical behaviors in the case of the presence of different degradation mechanisms.
- step 210 In the event that degradation is detected in test 230, a process of analyzing said curves to find a cause of degradation is carried out in step 210 and its result is displayed in step 220.
- the test 230 can be a comparison of the calculated curves with theoretical curves of types of degradation.
- FIG. 4 An illustrative example of determining the degradation path for a perovskite module (single junctions) is represented in FIG. 4.
- the curve dl/dV- (the slope in V mpp -a) is plotted, compared to dl/dV+ (the slope in V mpp + ⁇ ).
- the measurement points 11 taken at given intervals throughout the use of the panel are superimposed on possible degradation curves according to various causes of degradation Me1, degradation of the hole extractor layer (“HTL degradation”), Me2, degradation of the interface between hole extractor layer and perovskite (“PVK/HTL interface defects”), Me3, degradation of the perovskite layer (“PVK defects”), Me4, degradation of the interface between electron extracting layer and perovskite (“PVK/ETL interface defects”), Me5 degradation of the electron extracting layer (“ ETL degradation” in English).
- This determination can be generalized to any type of module.
- the method may include the comparison 240 of one or more degradation mechanisms D with a degradation limit indicator DLIM beyond which an alert 250 for early detection of anomalies is sent to an operator.
- the collected data can be analyzed according to distinct and/or chosen time ranges, the analysis can then make it possible to determine the mechanism responsible for the degradation during these periods.
- a mechanism degrading performance in winter is not activated by weather conditions in summer, and that another mechanism is then decisive.
- the analysis will therefore be differentiated for these periods.
- the data collected and analyzes made can be applied to the entire photovoltaic installation, or a distinction can be made between the chains connected to the different inputs of the monitoring device(s).
- Tracker MPPT-DM The tracking system called “tracker MPPT-DM" of the present disclosure which allows the monitoring of degradation mechanisms is presented in Figure 5 in the form of a box 12.
- two panels 15 are each connected to a box 12 of the present disclosure, the two boxes being connected to a DC/AC converter 16 connected to a network 21 .
- the box 12 which replaces a traditional MPP tracking box comprises power inputs 23 for connection to the panel and power outputs 22 to the converter and comprises an electronic card 17 provided with a digital processor 18, such as a microcontroller provided with digital and analog inputs/outputs by example, its associated memory 19, further provided with a display 13 allowing the results to be viewed, possibly a keyboard 14 and/or a communication module 20 with external link 25 to a remote computer 24 configured for example to program in particular in the digital processor 18 the types of measurements and the periodicity of these measurements or recover measurement data made by said box and to transmit to an operator information on the status of the modules and alerts on the detection of anomalies.
- a digital processor 18 such as a microcontroller provided with digital and analog inputs/outputs by example, its associated memory 19, further provided with a display 13 allowing the results to be viewed, possibly a keyboard 14 and/or a communication module 20 with external link 25 to a remote computer 24 configured for example to program in particular in the digital processor 18 the types of measurements and the periodicity of
- the digital processor 18 and its memory are configured to implement the method for monitoring the maximum power of the module(s) and the steps of the method of the present disclosure.
- This system is adaptable to any type of photovoltaic module.
- the box is inserted between photovoltaic modules such as photovoltaic panels and a direct voltage/alternating voltage (DC/AC) converter itself connected to an alternating network.
- the monitoring device can be integrated into the inverter box and be included in a “photovoltaic inverter” offer.
- the tracking device can also be used with or without the degradation analysis function.
- the present disclosure can apply to different types of modules regardless of their technology, the silicon and perovskite technologies being cited by way of non-limiting example and can relate to a photovoltaic field comprising more than two panels and in particular can comprise several rows of panels each connected to an MPPT-DM device as described.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photovoltaic Devices (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2114289A FR3131140B1 (fr) | 2021-12-22 | 2021-12-22 | Procede et dispositif de suivi de point de puissance maximale et de surveillance de degradation d’un module photovoltaique |
| PCT/EP2022/086289 WO2023117739A1 (fr) | 2021-12-22 | 2022-12-16 | Procede et dispositif de suivi de point de puissance maximale et de surveillance de degradation d'un module photovoltaique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4454122A1 true EP4454122A1 (fr) | 2024-10-30 |
Family
ID=80787100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22835075.7A Pending EP4454122A1 (fr) | 2021-12-22 | 2022-12-16 | Procede et dispositif de suivi de point de puissance maximale et de surveillance de degradation d'un module photovoltaique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250055418A1 (fr) |
| EP (1) | EP4454122A1 (fr) |
| CN (1) | CN118591983A (fr) |
| FR (1) | FR3131140B1 (fr) |
| WO (1) | WO2023117739A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3153483B1 (fr) * | 2023-09-27 | 2025-10-31 | Quantom | Méthode de détection de défauts dans une installation photovoltaïque |
| CN119341476B (zh) * | 2024-12-20 | 2025-04-22 | 合创检测(江苏)有限公司 | 光伏组件的电势诱导衰减检测方法、装置和计算机设备 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015119846A1 (de) * | 2015-11-17 | 2017-06-01 | Sma Solar Technology Ag | Verfahren und Vorrichtung zur Erkennung von Fehlern in einem Photovoltaik(PV)-Generator |
| KR102315244B1 (ko) * | 2018-09-05 | 2021-10-20 | 재단법인 멀티스케일 에너지시스템 연구단 | 전자 소자의 구동 방법 |
-
2021
- 2021-12-22 FR FR2114289A patent/FR3131140B1/fr active Active
-
2022
- 2022-12-16 US US18/722,945 patent/US20250055418A1/en active Pending
- 2022-12-16 WO PCT/EP2022/086289 patent/WO2023117739A1/fr not_active Ceased
- 2022-12-16 CN CN202280089148.XA patent/CN118591983A/zh active Pending
- 2022-12-16 EP EP22835075.7A patent/EP4454122A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3131140B1 (fr) | 2026-01-30 |
| CN118591983A (zh) | 2024-09-03 |
| US20250055418A1 (en) | 2025-02-13 |
| WO2023117739A1 (fr) | 2023-06-29 |
| FR3131140A1 (fr) | 2023-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Fault diagnosis approach for photovoltaic array based on the stacked auto-encoder and clustering with IV curves | |
| Ni et al. | An ensemble prediction intervals approach for short-term PV power forecasting | |
| CN109751206B (zh) | 风机叶片结冰故障预测方法、装置及存储介质 | |
| KR102065443B1 (ko) | 태양광 발전소의 데이터 분석 방법 및 시스템 | |
| CN118898051A (zh) | 面向微网的分布式光伏发电预测方法 | |
| CN107451600B (zh) | 一种基于隔离机制的在线光伏热斑故障检测方法 | |
| CN115036922B (zh) | 一种分布式光伏发电电量预测方法及系统 | |
| CN116800172B (zh) | 一种光电转换方法及储能系统 | |
| WO2023117739A1 (fr) | Procede et dispositif de suivi de point de puissance maximale et de surveillance de degradation d'un module photovoltaique | |
| Dimitrov et al. | From SCADA to lifetime assessment and performance optimization: how to use models and machine learning to extract useful insights from limited data | |
| Wang et al. | Performance assessment of photovoltaic modules based on daily energy generation estimation | |
| Bognár et al. | An unsupervised method for identifying local PV shading based on AC power and regional irradiance data | |
| CN105373849A (zh) | 光伏电池组件温度的分步预测方法 | |
| Ding et al. | A health status-based performance evaluation method of photovoltaic system | |
| Nedaei et al. | A smart step-by-step method for fault detection and severity assessment in photovoltaic arrays | |
| Shin et al. | Data preprocessing and machine learning method based on ameliorated mathematical models for inferring the power generation of photovoltaic system | |
| Ezzini et al. | Comparative analysis of monocrystalline and polycrystalline photovoltaic performance in arid climates using random forest for missing data completion | |
| CN121329373A (zh) | 光伏电站组串发电低效诊断方法及系统 | |
| Sutterlueti et al. | Forecast-based predictive analytics and optimized maintenance digital twin for utility-scale photovoltaic power plants | |
| Nguyen et al. | Machine learning-based estimation of power output in solar photovoltaic systems under real-world conditions | |
| Pérez et al. | Climatic neural modeling for fault characterization and prediction in wind energy systems | |
| Maddineni et al. | A Multi-Physics PINN Framework for Interpretable Wind Power Ramp Forecasting | |
| Madjoudj et al. | Journal of Solar Energy Research (JSER) | |
| Raj et al. | Design of an IoT platform for data analytics based fault detection and classification in solar PV power plants using CFKC and ODENN | |
| Ahatsi et al. | Improving Photovoltaic Cells Parameter Estimates Using AI–Overview and a Comparative Brief |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20240620 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
| INTG | Intention to grant announced |
Effective date: 20260707 |