Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300463
Tulio P. Duarte, A. Diniz, Suellen C. S. Costa, L. Kazmerski
Photovoltaic (PV) module performance depends upon a collection of inherent and related external parameters. The choice of a particular PV-technology for “best performance” at a location is sometimes based solely on the label specification or single operating condition—and may not consider multiple parameters that affect different technologies with distinctly different impacts. In this paper, the choice of appropriate PV technologies for moderate-to-harsh soiling/climate conditions is evaluated based upon frequently opposing parameters of spectral effects (relating to solar resource, module spectral response, and soiling layer properties) and module temperature (linked to module construction and absorber bandgap). This paper builds on a linear model based upon soiling rates and the temperature coefficients of the module technologies. The model is validated with extensive experimental soiling data for crystalline Si and thin-film CdTe, with model discussions for CIGS and a-Si:H—covering the range of bandgaps from 1.1 eV through 1.7 eV for valid intercomparisons. The paper provides analytical and correlated experimental information to predict, compare, and identify the “best-of-class” performances for these module types under tropical climate-zone conditions.
{"title":"PV Module Technology Comparisons: Comprehensive Study Differentiating Soiling Spectral Effects, Operating Temperature, and Climate Conditions","authors":"Tulio P. Duarte, A. Diniz, Suellen C. S. Costa, L. Kazmerski","doi":"10.1109/PVSC45281.2020.9300463","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300463","url":null,"abstract":"Photovoltaic (PV) module performance depends upon a collection of inherent and related external parameters. The choice of a particular PV-technology for “best performance” at a location is sometimes based solely on the label specification or single operating condition—and may not consider multiple parameters that affect different technologies with distinctly different impacts. In this paper, the choice of appropriate PV technologies for moderate-to-harsh soiling/climate conditions is evaluated based upon frequently opposing parameters of spectral effects (relating to solar resource, module spectral response, and soiling layer properties) and module temperature (linked to module construction and absorber bandgap). This paper builds on a linear model based upon soiling rates and the temperature coefficients of the module technologies. The model is validated with extensive experimental soiling data for crystalline Si and thin-film CdTe, with model discussions for CIGS and a-Si:H—covering the range of bandgaps from 1.1 eV through 1.7 eV for valid intercomparisons. The paper provides analytical and correlated experimental information to predict, compare, and identify the “best-of-class” performances for these module types under tropical climate-zone conditions.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"13 1","pages":"2099-2103"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85013800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300610
H. Afshari, B. Durant, K. Hossain, D. Poplavskyy, B. Rout, I. Sellers
The response of CIGS solar cells to 1.5 MeV proton irradiation is investigated through their photovoltaic response before and after irradiation in conjunction with proton induced defect modeling using SRIM. Simulations of the trajectory of the protons in the system indicate that the bulk of the absorber layer and the CIGS/Mo back contact are the regions most affected by proton irradiation. Additionally, SCAPS is used to qualitatively reproduce experimental current-voltage and external quantum efficiency measurements. These results allude to a systematic increase in deep defect states that result in decreased carrier extraction in the bulk and increased shunting upon irradiation.
{"title":"CIGS Solar Cells for Outer Planetary Space Applications: the Effect of Proton Irradiation","authors":"H. Afshari, B. Durant, K. Hossain, D. Poplavskyy, B. Rout, I. Sellers","doi":"10.1109/PVSC45281.2020.9300610","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300610","url":null,"abstract":"The response of CIGS solar cells to 1.5 MeV proton irradiation is investigated through their photovoltaic response before and after irradiation in conjunction with proton induced defect modeling using SRIM. Simulations of the trajectory of the protons in the system indicate that the bulk of the absorber layer and the CIGS/Mo back contact are the regions most affected by proton irradiation. Additionally, SCAPS is used to qualitatively reproduce experimental current-voltage and external quantum efficiency measurements. These results allude to a systematic increase in deep defect states that result in decreased carrier extraction in the bulk and increased shunting upon irradiation.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"73 1","pages":"2635-2637"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85062896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300632
S. Moghadamzadeh, S. Gharibzadeh, M. Jakoby, M. R. Khan, A. Haghighirad, I. Howard, B. Richards, U. Lemmer, U. Paetzold
The power conversion efficiency of hybrid organic-inorganic perovskite solar cells (PSCs) has been reported to increase spontaneously during storage in the dark and reaches its maximum sometimes only after several days. In most cases, an increased open-circuit voltage contributes to enhanced efficiency. This work investigates the role of surface passivation, in a form of 2D/3D perovskite heterostructures, at the hole extracting side of a triple-cation PSC in the spontaneous enhancement. Our observations demonstrate that spontaneous enhancement occurs for surface-passivated devices and therefore rule out surface passivation mechanisms initiating the spontaneous enhancement.
{"title":"Spontaneous Enhancement of the Power Output in Surface-Passivated Triple-Cation Perovskite Solar Cells","authors":"S. Moghadamzadeh, S. Gharibzadeh, M. Jakoby, M. R. Khan, A. Haghighirad, I. Howard, B. Richards, U. Lemmer, U. Paetzold","doi":"10.1109/PVSC45281.2020.9300632","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300632","url":null,"abstract":"The power conversion efficiency of hybrid organic-inorganic perovskite solar cells (PSCs) has been reported to increase spontaneously during storage in the dark and reaches its maximum sometimes only after several days. In most cases, an increased open-circuit voltage contributes to enhanced efficiency. This work investigates the role of surface passivation, in a form of 2D/3D perovskite heterostructures, at the hole extracting side of a triple-cation PSC in the spontaneous enhancement. Our observations demonstrate that spontaneous enhancement occurs for surface-passivated devices and therefore rule out surface passivation mechanisms initiating the spontaneous enhancement.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"1 1","pages":"1217-1219"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85224866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300771
Bader Alabdulrazzaq, M. Adouane, A. Al-Qattan
Soiling due to dust accumulation can have a significant impact of the performance of photovoltaic modules, especially in desert environment with frequent dust storms and humidity. In this work, we investigate the role that the geometry and shape of the PV module can have on mitigating soiling losses from dust deposition and accumulation. We evaluate the soiling loss and specific yield of 6 different modules, one being a cylindrical module, under outdoor exposure for 12 months. The results show favorable soiling ratio for the cylindrical module throughout the year, which can reach up to three-fold reduction in soiling losses when compared to traditional modules in the study. The cylindrical module also shows stable soiling loss percentage which remains below 10% under all but severe dust events, where best-case soiling losses of above 20% were observed from the other modules under the same conditions. When left uncleaned, the cylindrical module has a higher specific yield than four of the five studied soiled modules, highlighting the potential benefits of utilizing the modules geometry for soiling loss mitigation, especially for deployment in environments where regular cleaning is not feasible.
{"title":"On the Effect of PV Geometry on Soiling: Exploring Use-cases for Cylindrical PV Modules as a Soiling Loss Mitigation Method","authors":"Bader Alabdulrazzaq, M. Adouane, A. Al-Qattan","doi":"10.1109/PVSC45281.2020.9300771","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300771","url":null,"abstract":"Soiling due to dust accumulation can have a significant impact of the performance of photovoltaic modules, especially in desert environment with frequent dust storms and humidity. In this work, we investigate the role that the geometry and shape of the PV module can have on mitigating soiling losses from dust deposition and accumulation. We evaluate the soiling loss and specific yield of 6 different modules, one being a cylindrical module, under outdoor exposure for 12 months. The results show favorable soiling ratio for the cylindrical module throughout the year, which can reach up to three-fold reduction in soiling losses when compared to traditional modules in the study. The cylindrical module also shows stable soiling loss percentage which remains below 10% under all but severe dust events, where best-case soiling losses of above 20% were observed from the other modules under the same conditions. When left uncleaned, the cylindrical module has a higher specific yield than four of the five studied soiled modules, highlighting the potential benefits of utilizing the modules geometry for soiling loss mitigation, especially for deployment in environments where regular cleaning is not feasible.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"1 1","pages":"0606-0610"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85614032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300448
J. Schube, T. Fellmeth, M. Weil, S. Nold, R. Keding, S. Glunz
Intense pulsed light (IPL) is capable of entirely replacing thermal annealing (curing and contact formation) within back end processing of silicon heterojunction solar cells. In order to demonstrate this, full-size silicon heterojunction (SHJ) cells with IPL-processed screen-printed metal contacts are evaluated. Such cells reach conversion efficiencies of up to 23.0%. On average, IPL-annealed SHJ cells outperform their thermally treated pendants by 0.3-0.4%abs, in particular because of higher open-circuit voltages and fill factors. Moreover, IPL offers high throughput and low footprint. This results in a cost of ownership reduction potential of 6%rel compared to state-of-the-art thermal annealing.
{"title":"Intense Pulsed Light in Back End Processing of Silicon Heterojunction Solar Cells","authors":"J. Schube, T. Fellmeth, M. Weil, S. Nold, R. Keding, S. Glunz","doi":"10.1109/PVSC45281.2020.9300448","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300448","url":null,"abstract":"Intense pulsed light (IPL) is capable of entirely replacing thermal annealing (curing and contact formation) within back end processing of silicon heterojunction solar cells. In order to demonstrate this, full-size silicon heterojunction (SHJ) cells with IPL-processed screen-printed metal contacts are evaluated. Such cells reach conversion efficiencies of up to 23.0%. On average, IPL-annealed SHJ cells outperform their thermally treated pendants by 0.3-0.4%abs, in particular because of higher open-circuit voltages and fill factors. Moreover, IPL offers high throughput and low footprint. This results in a cost of ownership reduction potential of 6%rel compared to state-of-the-art thermal annealing.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"44 1","pages":"0197-0203"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85922139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300729
Curtis Walkons, T. Friedlmeier, S. Paetel, W. Hempel, M. Nardone, E. Barnard, K. Kweon, V. Lordi, S. Bansal
Three types of CIGS devices with varying treatments of RbF post-deposition treatment (PDT) and sodium are subjected to accelerated stress test (AST) conditions at elevated temperature (65 °C), voltage bias (short- vs open-circuit), and illumination (AM1.5 vs dark). RbF treatment with reduced CdS thickness shows an improvement in Voc and efficiency in this sample series, and also results in high FF and doping ~ 1016cm−3. Cells with reduced sodium show a decrease in Voc and infrared QE results suggest a higher optical minimum bandgap. Heat and light soaking experiments at 50, 65, and 75 °C, open and short-circuit junction bias under AM1.5G illumination suggest stabilization of CIGS solar cells with addition of Na and RbF. SCAPS-1D simulations suggest reduction in thermally ionized defect density in ordered vacancy compound (OVC) and changes in conduction band offset with RbF post-deposition treatment. Further, simulations show an increase in shallow acceptor and donor density after open-circuit and short-circuit AST respectively. Preliminary light soaking results for oxidized CIGS with and without Na are also discussed.
{"title":"Effects of Alkali and Oxidation Treatments on Efficiency and Stability of CdS/CIGS Solar Cells","authors":"Curtis Walkons, T. Friedlmeier, S. Paetel, W. Hempel, M. Nardone, E. Barnard, K. Kweon, V. Lordi, S. Bansal","doi":"10.1109/PVSC45281.2020.9300729","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300729","url":null,"abstract":"Three types of CIGS devices with varying treatments of RbF post-deposition treatment (PDT) and sodium are subjected to accelerated stress test (AST) conditions at elevated temperature (65 °C), voltage bias (short- vs open-circuit), and illumination (AM1.5 vs dark). RbF treatment with reduced CdS thickness shows an improvement in Voc and efficiency in this sample series, and also results in high FF and doping ~ 1016cm−3. Cells with reduced sodium show a decrease in Voc and infrared QE results suggest a higher optical minimum bandgap. Heat and light soaking experiments at 50, 65, and 75 °C, open and short-circuit junction bias under AM1.5G illumination suggest stabilization of CIGS solar cells with addition of Na and RbF. SCAPS-1D simulations suggest reduction in thermally ionized defect density in ordered vacancy compound (OVC) and changes in conduction band offset with RbF post-deposition treatment. Further, simulations show an increase in shallow acceptor and donor density after open-circuit and short-circuit AST respectively. Preliminary light soaking results for oxidized CIGS with and without Na are also discussed.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"25 1","pages":"1459-1465"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85963967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300878
Wook-Jin Choi, Aditi Jain, Ying-Yuan Huang, Y. Ok, A. Rohatgi
This paper reports on the modeling, optimization, and implementation of p-TOPCon (tunnel oxide passivating contacts) on the rear side of a PERC to enhance its cell efficiency. Local Al-BSF of a traditional PERC was replaced by p+ poly-Si/oxide passivated contact composed of ~15Å thick chemically grown tunnel oxide, capped with 120-250nm thick p+ poly-Si layer grown by LPCVD. Process optimization resulted in full-area un-metallized recombination current density (J0b, pass) of < 5fA/cm2 for planar surface, nearly independent of poly-Si thickness in this range. Metallized Jo showed an increase with decreased poly-Si thickness and was found to be 9.6 and 25fA/cm2 for 250nm and 120nm poly-Si respectively, with 4.6% direct metal-Si contact fraction, suitable for bifacial cells. A 21.4% baseline PERC cell with local BSF was fabricated and characterized to extract the rear side recombination current density (J0b,) of 65fA/cm2. Detailed analysis and device simulation showed that by replacing this LBSF with 250nm TOPCon developed in the study should produce a Voc enhancement of 9.2mV, consistent with the observed cell Voc increase of 10mV.
{"title":"Quantitative Understanding and Implementation of Screen Printed p+ Poly-Si/Oxide Passivated Contact to Enhance the Efficiency of p-PERC Cells","authors":"Wook-Jin Choi, Aditi Jain, Ying-Yuan Huang, Y. Ok, A. Rohatgi","doi":"10.1109/PVSC45281.2020.9300878","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300878","url":null,"abstract":"This paper reports on the modeling, optimization, and implementation of p-TOPCon (tunnel oxide passivating contacts) on the rear side of a PERC to enhance its cell efficiency. Local Al-BSF of a traditional PERC was replaced by p+ poly-Si/oxide passivated contact composed of ~15Å thick chemically grown tunnel oxide, capped with 120-250nm thick p+ poly-Si layer grown by LPCVD. Process optimization resulted in full-area un-metallized recombination current density (J0b, pass) of < 5fA/cm2 for planar surface, nearly independent of poly-Si thickness in this range. Metallized Jo showed an increase with decreased poly-Si thickness and was found to be 9.6 and 25fA/cm2 for 250nm and 120nm poly-Si respectively, with 4.6% direct metal-Si contact fraction, suitable for bifacial cells. A 21.4% baseline PERC cell with local BSF was fabricated and characterized to extract the rear side recombination current density (J0b,) of 65fA/cm2. Detailed analysis and device simulation showed that by replacing this LBSF with 250nm TOPCon developed in the study should produce a Voc enhancement of 9.2mV, consistent with the observed cell Voc increase of 10mV.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"35 1","pages":"0821-0824"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76607586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/pvsc45281.2020.9300624
A. Danielson, D. Kuciauskas, Carey Reich, Siming Li, A. Onno, W. Weigand, Anna Kindvall, A. Munshi, Z. Holman, W. Sampath
Since excellent carrier lifetimes and front interface electronic quality are now achieved, rear interface recombination can limit VOC in $text{CdSe}_{mathrm{x}}text{Te}_{1-mathrm{x}}/text{CdTe}$ solar cells. Several back-contact structures for devices were fabricated using combinations of tellurium, aluminum oxide, amorphous silicon, and indium tin oxide (ITO). Time-resolved photoluminescence was used to characterize such structures. We show increasingly improved interface passivation through the subsequent use of aluminum oxide, amorphous silicon, and ITO. Additionally, we show that arsenic-doped absorbers form a more passive interface with numerous back contact structures.
{"title":"$text{CdSe}_{mathrm{x}}text{Te}_{1-mathrm{x}}/text{CdTe}$ Devices with Reduced Interface Recombination Through Novel Back Contacts and Group-V Doping","authors":"A. Danielson, D. Kuciauskas, Carey Reich, Siming Li, A. Onno, W. Weigand, Anna Kindvall, A. Munshi, Z. Holman, W. Sampath","doi":"10.1109/pvsc45281.2020.9300624","DOIUrl":"https://doi.org/10.1109/pvsc45281.2020.9300624","url":null,"abstract":"Since excellent carrier lifetimes and front interface electronic quality are now achieved, rear interface recombination can limit VOC in $text{CdSe}_{mathrm{x}}text{Te}_{1-mathrm{x}}/text{CdTe}$ solar cells. Several back-contact structures for devices were fabricated using combinations of tellurium, aluminum oxide, amorphous silicon, and indium tin oxide (ITO). Time-resolved photoluminescence was used to characterize such structures. We show increasingly improved interface passivation through the subsequent use of aluminum oxide, amorphous silicon, and ITO. Additionally, we show that arsenic-doped absorbers form a more passive interface with numerous back contact structures.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"185 1","pages":"1811-1812"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76927803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300535
E. Ortega, G. Aranguren, J. Jimeno
The first results of the Module to Module Monitoring System (M3S) in an outdoor PV system are presented. M3S is able to take partial measurements of the I-V characteristic of a PV module without power electronics and with small capacitors, in the order of tens of microfarads. The measurements are performed without disconnecting the PV module from the rest of the system. The entire measurements are done in less than 5 ms. These short times add an hysteresis effect to the measurements, due to PV modules internal capacitance. In this work an algorithm is implemented to correct the hysteresis effect from the measurements and the I-V characteristic of the module and its parameters are estimated.
{"title":"Photovoltaic modules self testing using M3S in an outdoor system","authors":"E. Ortega, G. Aranguren, J. Jimeno","doi":"10.1109/PVSC45281.2020.9300535","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300535","url":null,"abstract":"The first results of the Module to Module Monitoring System (M3S) in an outdoor PV system are presented. M3S is able to take partial measurements of the I-V characteristic of a PV module without power electronics and with small capacitors, in the order of tens of microfarads. The measurements are performed without disconnecting the PV module from the rest of the system. The entire measurements are done in less than 5 ms. These short times add an hysteresis effect to the measurements, due to PV modules internal capacitance. In this work an algorithm is implemented to correct the hysteresis effect from the measurements and the I-V characteristic of the module and its parameters are estimated.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"11 1","pages":"1035-1041"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80950550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-14DOI: 10.1109/PVSC45281.2020.9300744
R. Gottschalg, M. Ebert, S. Dittmann, B. Jäckel
All industries have sometimes quality issues with their products, and photovoltaics (PV) are no different. A major difference is that problems with the operation of photovoltaic systems are often treated confidentially and, unlike other industries, no general recalls are issued as they are common in automotive or telecommunication industry. This does, however, not mean that no issues exist. The PV industry is unfortunately still at a stage where quality assurance is often seen as an avoidable cost. There are three problems discussed which could have avoided problems (1) Equating IEC certification with quality control, (2) No relevant component tests, (3) Cost driven supply chain management. In here we present a generalized Quality Assurance (QA) scheme as a feasible approach for the PV industry and brought into context to more developed industries. Most examples will be for PV modules within this contribution but are not limited to those. However, the quality assurance must consider the final product, in the case this must always refer to the PV system at a particular location as a whole not just individual parts or design stages.
{"title":"Systematic causes of problems in operation of PV systems","authors":"R. Gottschalg, M. Ebert, S. Dittmann, B. Jäckel","doi":"10.1109/PVSC45281.2020.9300744","DOIUrl":"https://doi.org/10.1109/PVSC45281.2020.9300744","url":null,"abstract":"All industries have sometimes quality issues with their products, and photovoltaics (PV) are no different. A major difference is that problems with the operation of photovoltaic systems are often treated confidentially and, unlike other industries, no general recalls are issued as they are common in automotive or telecommunication industry. This does, however, not mean that no issues exist. The PV industry is unfortunately still at a stage where quality assurance is often seen as an avoidable cost. There are three problems discussed which could have avoided problems (1) Equating IEC certification with quality control, (2) No relevant component tests, (3) Cost driven supply chain management. In here we present a generalized Quality Assurance (QA) scheme as a feasible approach for the PV industry and brought into context to more developed industries. Most examples will be for PV modules within this contribution but are not limited to those. However, the quality assurance must consider the final product, in the case this must always refer to the PV system at a particular location as a whole not just individual parts or design stages.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":"74 1","pages":"1675-1679"},"PeriodicalIF":0.0,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85535098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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