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Irradiance estimation for a smart PV array

Published on Sep 1, 2015
· DOI :10.1109/ECCE.2015.7309811
Henry Braun4
Estimated H-index: 4
(ASU: Arizona State University),
Shwetang Peshin1
Estimated H-index: 1
(ASU: Arizona State University)
+ 4 AuthorsDevarajan Srinivasan2
Estimated H-index: 2
Cite
Abstract
Electrical mismatch between modules in a PV array due to partial shading causes energy losses beyond the shaded module. This occurs because unshaded modules are forced to operate away from their maximum power point in order to compensate for the shading. Here we present an irradiance estimation algorithm for use in a mismatch mitigation system. Irradiance is estimated using measurements of module voltage, current, and back surface temperature. These estimates may be used to optimize an array's electrical configuration and reduce the mismatch losses caused by partial shading. Propagation of error in the estimation is examined; we find that accuracy is sufficient for use in the proposed mismatch mitigation application.
  • References (9)
  • Citations (1)
Cite
References9
Newest
Published on Jan 1, 2015
Shwetang Peshin1
Estimated H-index: 1
(ASU: Arizona State University),
Andreas Spanias25
Estimated H-index: 25
+ 5 AuthorsDevarajan Srinivansan1
Estimated H-index: 1
Published on Jan 1, 2013
Venkatachalam Krishnan3
Estimated H-index: 3
(ASU: Arizona State University),
Henry Braun4
Estimated H-index: 4
(ASU: Arizona State University)
+ 1 AuthorsAndreas Spanias25
Estimated H-index: 25
With increased adoption of renewable energy, more effective array management strategies are needed. Many arrays are located in remote locations, where faults within the array often go unnoticed and unattended for large periods of time. Technicians sent to rectify the faults must spend a large amount of time determining the location of the fault manually. Automated monitoring systems are needed to obtain the information about the performance of the array and detect faults. Such systems must monit...
Published on Mar 1, 2012 in ICASSP (International Conference on Acoustics, Speech, and Signal Processing)
Henry Braun4
Estimated H-index: 4
(ASU: Arizona State University),
Santoshi T. Buddha3
Estimated H-index: 3
(ASU: Arizona State University)
+ 4 AuthorsToru Takehara3
Estimated H-index: 3
Photovoltaics (PV) is an important and rapidly growing area of research. With the advent of power system monitoring and communication technology collectively known as the “smart grid,” an opportunity exists to apply signal processing techniques to monitoring and control of PV arrays. In this paper a monitoring system which provides real-time measurements of each PV module's voltage and current is considered. A fault detection algorithm formulated as a clustering problem and addressed using the r...
Published on Feb 1, 2011
Ghias Farivar9
Estimated H-index: 9
(UT: University of Tehran),
Behzad Asaei10
Estimated H-index: 10
(UT: University of Tehran)
+ 1 AuthorsHossein Iman-Eini18
Estimated H-index: 18
(UT: University of Tehran)
In this paper, an effective approach for estimating the operating temperature of a photovoltaic (PV) module is presented. The developed method is simple and does not need any additional hardware. The proposed approach uses an analytical formula to derive the temperature from the maximum power point (MPP) voltage and current. The effectiveness of the new method is investigated through some conducted simulations in MATLAB/Simulink environment and its validity is verified by experiment on REC-AE220...
Published on Jan 1, 2006in Solar Energy 4.67
W. De Soto2
Estimated H-index: 2
(UW: University of Wisconsin-Madison),
S.A. Klein46
Estimated H-index: 46
(UW: University of Wisconsin-Madison),
W.A. Beckman41
Estimated H-index: 41
(UW: University of Wisconsin-Madison)
Abstract Manufacturers of photovoltaic panels typically provide electrical parameters at only one operating condition. Photovoltaic panels operate over a large range of conditions so the manufacturer’s information is not sufficient to determine their overall performance. Designers need a reliable tool to predict energy production from a photovoltaic panel under all conditions in order to make a sound decision on whether or not to incorporate this technology. A model to predict energy production ...
Published on Jan 1, 2005
Guillermo Velasco Quesada8
Estimated H-index: 8
,
Juan J. Negroni9
Estimated H-index: 9
+ 1 AuthorsRobert Piqué López5
Estimated H-index: 5
A dynamic interconnection of PV modules based on an irradiance equalization algorithm in grid-connected systems based on a plant oriented configuration is presented. The maximum output power at the PV generator level obtained with approach is similar to that obtained in the module integrated configuration
Published on Aug 1, 2004
Jay A. Kratochvil12
Estimated H-index: 12
,
William E. Boyson12
Estimated H-index: 12
,
David L. King31
Estimated H-index: 31
This document summarizes the equations and applications associated with the photovoltaic array performance model developed at Sandia National Laboratories over the last twelve years. Electrical, thermal, and optical characteristics for photovoltaic modules are included in the model, and the model is designed to use hourly solar resource and meteorological data. The versatility and accuracy of the model has been validated for flat-plate modules (all technologies) and for concentrator modules, as ...
Published on Dec 31, 1996
David L. King31
Estimated H-index: 31
(SNL: Sandia National Laboratories)
This paper provides new test methods and analytical procedures for characterizing the electrical performance of photovoltaic modules and arrays. The methods use outdoor measurements to provide performance parameters both at standard reporting conditions and for all operating conditions encountered by typical photovoltaic systems. Improvements over previously used test methods are identified, and examples of the successful application of the methodology are provided for crystalline- and amorphous...
Published on Nov 15, 1989in Applied Optics 1.97
Fritz Kasten5
Estimated H-index: 5
(DWD: Deutscher Wetterdienst),
A. T. Young15
Estimated H-index: 15
(SDSU: San Diego State University)
We correct an error in a widely used air mass table by recalculating the values on the basis of the ISO Standard Atmosphere (1972) and revise its approximation formula.
Cited By1
Newest
Published on Aug 1, 2017
Andreas Spanias25
Estimated H-index: 25
(ASU: Arizona State University)
Photovoltaic (PV) array analytics and control have become necessary for remote solar farms and for intelligent fault detection and power optimization. The management of a PV array requires auxiliary electronics that are attached to each solar panel. A collaborative industry-university-government project was established to create a smart monitoring device (SMD) and establish associated algorithms and software for fault detection and solar array management. First generation smart monitoring device...
Published on Jun 1, 2016in Sustainable Energy, Grids and Networks
Henry Braun4
Estimated H-index: 4
(ASU: Arizona State University),
Santoshi T. Buddha3
Estimated H-index: 3
(ASU: Arizona State University)
+ 4 AuthorsDevarajan Srinivasan2
Estimated H-index: 2
(ASU: Arizona State University)
As more utility scale photovoltaic (PV) power plants are installed, there is a need to improve monitoring and management of PV arrays. A procedure is presented here for optimizing the electrical configuration of a PV array under a variety of operating conditions. Computer simulations and analysis with synthetic and real data are presented in this paper. The performance of the optimization system is evaluated for a variety of partial shading conditions using a SPICE circuit simulator. In general,...