Forecasting photovoltaic array power production subject to mismatch losses

Published on Jul 1, 2010in Solar Energy4.674
· DOI :10.1016/j.solener.2010.04.009
Damien Picault9
Estimated H-index: 9
Bertrand Raison19
Estimated H-index: 19
+ 2 AuthorsJorge Aguilera20
Estimated H-index: 20
(University of Jaén)
Abstract The development of photovoltaic (PV) energy throughout the world this last decade has brought to light the presence of module mismatch losses in most PV applications. Such power losses, mainly occasioned by partial shading of arrays and differences in PV modules, can be reduced by changing module interconnections of a solar array. This paper presents a novel method to forecast existing PV array production in diverse environmental conditions. In this approach, field measurement data is used to identify module parameters once and for all. The proposed method simulates PV arrays with adaptable module interconnection schemes in order to reduce mismatch losses. The model has been validated by experimental results taken on a 2.2 kWp plant, with three different interconnection schemes, which show reliable power production forecast precision in both partially shaded and normal operating conditions. Field measurements show interest in using alternative plant configurations in PV systems for decreasing module mismatch losses.
  • References (27)
  • Citations (160)
📖 Papers frequently viewed together
713 Citations
20064.67Solar Energy
3 Authors (W. De Soto, ..., William A. Beckman)
1,000 Citations
20074.67Solar Energy
3 Authors (Engin Karatepe, ..., Metin Çolak)
259 Citations
78% of Scinapse members use related papers. After signing in, all features are FREE.
A novel procedure to extract and analyze the power losses, mainly due to mismatch effects, in a photovoltaic (PV) system is presented. The developed model allows the extraction of the main PV module and PV array parameters from I-V characteristics, as well as in dynamic behavior under real conditions of work. The method allows a good estimation of the mismatch effect on the total PV system power losses.
51 CitationsSource
#2Iulian MunteanuH-Index: 17
Last. Bertrand RaisonH-Index: 19
view all 5 authors...
This paper proposes a control strategy aiming at operating cascaded DC-DC converter architectures of photovoltaic (PV) modules at maximum power irrespective of the irradiance conditions, meanwhile meeting constraints of voltage-limitation type. The global optimum of cascaded connections of PV modules is generally equivalent with operating all the modules at maximum power point tracking (MPPT). The most important disturbance occurs when the irradiance levels of modules are sensibly different beca...
32 CitationsSource
An exact explicit solution based on the Lambert W-function is presented to express the optimum load of an illuminated solar cell containing a parasitic series resistance and a shunt resistance. The W-function expressions are derived using Matlab software. The method is validated by comparing the model-predicted results to the experimental data for three real solar cells. The impacts of the series resistance and shunt resistance on the optimum load are also studied and the results show a good con...
47 CitationsSource
#1M. Drif (University of Jaén)H-Index: 3
#2P.J. Pérez (University of Jaén)H-Index: 5
Last. J.D. Aguilar (University of Jaén)H-Index: 5
view all 4 authors...
A new method for estimating the irradiance on a partially shaded photovoltaic generator system is proposed. The basic principle of this method consists of two parts: firstly, an approximation of the obstacles’ outline or the local horizon by a set of linear functions. Here, a survey of the surroundings is based on the reading of the topographic coordinates of the only significant points of all the objects surrounding the photovoltaic generator. Secondly, the irradiance on the photovoltaic plane ...
89 CitationsSource
#1Dzung Nguyen (NU: Northeastern University)H-Index: 2
#2Brad Lehman (NU: Northeastern University)H-Index: 30
This paper proposes an adaptive reconfiguration scheme to reduce the effect of shadows on solar panels. A switching matrix connects a solar adaptive bank to a fixed part of a solar photovoltaic (PV) array, according to a model-based control algorithm that increases the power output of the solar PV array. Control algorithms are implemented in real time. An experimental reconfiguration PV system with a resistive load is presented and is shown to verify the proposed reconfigurations.
246 CitationsSource
#1E. RomanH-Index: 7
#2V. MartinezH-Index: 4
Last. S. ElorduizapatarietxeH-Index: 3
view all 6 authors...
Last issues about Building Integrated Photovoltaic Systems (BIPV) still show average Performance Ratio (PR) values in the range of 0.75–0.80. The main causes well known: partial shadows, temperature effects, PV inverter losses, thermal losses, etc. and mismatching losses. Ideally, all the modules work in the same conditions, but differences between modules really exist due to differences in the working temperature, the inclination or orientation angles, differences in the I–V characteristic comi...
60 CitationsSource
#1Hiren H. Patel (IITs: Indian Institutes of Technology)H-Index: 9
#2Vivek Agarwal (IITs: Indian Institutes of Technology)H-Index: 34
The performance of a photovoltaic (PV) array is affected by temperature, solar insolation, shading, and array configuration. Often, the PV arrays get shadowed, completely or partially, by the passing clouds, neighboring buildings and towers, trees, and utility and telephone poles. The situation is of particular interest in case of large PV installations such as those used in distributed power generation schemes. Under partially shaded conditions, the PV characteristics get more complex with mult...
713 CitationsSource
#1Giovanni Petrone (UNISA: University of Salerno)H-Index: 33
#2Giovanni Spagnuolo (UNISA: University of Salerno)H-Index: 31
Last. M. VitelliH-Index: 20
view all 3 authors...
A new model of photovoltaic (PV) fields is introduced in this paper. It allows the simulation of a PV generator whose subsections, e.g. cells, groups of cells, panels or group of panels, work under different solar irradiation values and/or at different temperatures. Moreover, different nominal characteristics, rated power, production technology, shape and area can be settled for different subsections. Consequently, the proposed model is able to describe the behaviour of matched as well as mismat...
153 CitationsSource
#1Engin Karatepe (Ege University)H-Index: 23
#2Mutlu Boztepe (Ege University)H-Index: 7
Last. Metin Çolak (Ege University)H-Index: 6
view all 3 authors...
The aim of this study is to investigate the effects of non-uniform solar irradiation distribution on energy output of different interconnected configurations in photovoltaic (PV) arrays. In order to find which configuration is less susceptible to mismatch effects, a PV module model is developed. This model can take into consideration the effects of bypass diodes and the variation of the equivalent circuit parameters with respect to operating conditions. The proposed model can provide sufficient ...
259 CitationsSource
#1N.D. KaushikaH-Index: 14
#2Anil K. Rai (IITD: Indian Institute of Technology Delhi)H-Index: 1
Solar photovoltaic (PV) arrays in field conditions deliver lower power than the array rating. In this paper, the sensitivity of solar cell parameters in the variation of available power from the array is investigated. The parameters characteristic of aging and fresh cells used in prototype field systems have been used for computation of reduction in the available power. It is found that in series string the fractional power loss would increase from 2% to 12% with aging of solar cells. However, t...
144 CitationsSource
Cited By160
#1Naveed ur Rehman (AUT: Auckland University of Technology)H-Index: 2
#2Muhammad Uzair (NED University of Engineering and Technology)H-Index: 3
Abstract Existing studies are focused on maximizing the solar energy collection by photovoltaic modules installed on a flat (horizontal) field. This paper presents an analytical model, which considers the tilt angle of the field along with the modules and evaluates the direct solar energy accumulation within a given time period. Validation of the model is performed by comparing the results with measurements obtained from a computer-aided 3D model. Then, various applications of the model are demo...
#1Yingquan Zou (Southwest Jiaotong University)H-Index: 1
#2Fei Yan (Southwest Jiaotong University)H-Index: 1
Last. Jiyong Zhang (Southwest Jiaotong University)H-Index: 1
view all 4 authors...
Abstract Under partially shaded conditions, solar photovoltaic (PV) array power-voltage (P-V) characteristic curve will show multiple peaks, and maximum power point tracking (MPPT) by using fuzzy control algorithm is easy to fall into the local optimal solution. In view of the above problems, an improved maximum power point tracking algorithm is proposed based on the fuzzy control method and the differential flatness control theory. Firstly, the output voltage of the PV array increases linearly ...
2 CitationsSource
#1Karan S Faldu (VRCE: Visvesvaraya National Institute of Technology)
#2P S Kulkarni (VRCE: Visvesvaraya National Institute of Technology)
In accordance with the Partial Shading Conditions (PSCs), the Photovoltaic(PV) array receives non-uniform insolation. This results a weighty drop in power output and creates the multiple maximum points in P-V curve. To solve this problem, PV modules in array are interconnected in various configurations. These configurations increase the output power of PV array by provide an alternative path to the direction of current. In this paper a Symmetrical Array (SA) puzzle pattern configuration is prese...
#1D. Prince Winston (Kamaraj College of Engineering and Technology)H-Index: 10
#2S. Kumaravel (NITC: National Institute of Technology Calicut)H-Index: 1
Last. S. Devakirubakaran (Sethu Institute of Technology)H-Index: 1
view all 4 authors...
Abstract The output power produced by solar Photovoltaic (PV) array is reduced drastically by partial shading effect. Various array formation and reconfiguration techniques were introduced by many researchers to mitigate partial shading effects in PV array. This paper proposes new PV Array Topologies (PVATs) to improve the performance during partial shading conditions (PSCs). Totally, eight shading patterns are considered in the analysis for seven types of array configurations. Based on the exis...
3 CitationsSource
#1Haider Ibrahim (University of Chichester)H-Index: 2
#2Nader Anani (University of Wolverhampton)
Last. Nader AnaniH-Index: 2
view all 2 authors...
In this paper, variations of the adverse effects of different partial shading patterns on the performance of a photovoltaic (PV) array with different array configurations is investigated using MATLAB/Simulink. The configurations considered were: Series-parallel (SP), total-cross-tied (TCT), bridged-linked (BL), and honey-comb (HC). Each configuration was investigated using a 4 × 4 PV array of KYOCERA KC200GT modules. The results show strong correlation between these effects and the configuration...
#1Papul Changmai (Assam Don Bosco University)H-Index: 1
#2Sanjeev Kumar Metya (National Institute of Technology, Arunachal Pradesh)H-Index: 3
In solar photovoltaic (PV) array, sometime it is seen that some parts of the array gets shaded due to the obstacles like trees, nearby houses, and pillars. This phenomenon is commonly known as partial shading. During partial shading, the efficiency of the solar PV array decreases severely. Because of that, the maximum power point (MPP) of the whole PV array decreases heavily. If the partial shading occurs in the same location for a longer period of time due to the deposition of dust or mud or ob...
#1D. Lopez del Moral (Charles III University of Madrid)H-Index: 3
#2Andres Barrado (Charles III University of Madrid)H-Index: 24
Last. Pablo Zumel Vaquero (Charles III University of Madrid)H-Index: 20
view all 6 authors...
Abstract The Distributed Maximum Power Point Tracking (DMPPT) architecture is employed to overcome the mismatching phenomena in grid-tied photovoltaic (PV) installations. In this kind of architecture, a DC-DC module integrated converter (MIC) manages each PV panel. Thanks to the DC-DC converters, the differences between PV panels do not influence others, maximizing the amount of harvested power. The MIC requirements to make this kind of solutions profitable are voltage step-down and step-up capa...
#1Elson Yoiti Sako (State University of Campinas)H-Index: 1
#2João Lucas de Souza Silva (State University of Campinas)H-Index: 1
Last. Marcelo Gradella Villalva (State University of Campinas)H-Index: 12
view all 6 authors...
With the diffusion of the implantation of photovoltaic systems, it became necessary to research to increase efficiency and improve the payback of the investment. In this way, losses in photovoltaic systems are an obstacle, and among the several losses, losses by mismatch can be highlighted. Thus, the paper proposes to collect in literature and classify the causes and to point out the solutions for mismatch losses in a PV system, and posteriorly a case study on a PV system comparing the PV module...
#1Woo Gyun ShinH-Index: 1
#2Jong Rok LimH-Index: 2
Last. Suk Whan KoH-Index: 3
view all 6 authors...
#1Lei WangH-Index: 1
view all 6 authors...