Positioning of PV panels for reduction in line losses and mismatch losses in PV array

Potnuru, Srinivasa Rao; Pattabiraman, Dinesh; Ilango, G. Saravana; Nagamani, C.

doi:10.1016/j.renene.2014.12.055

Cited by 158 publications

(56 citation statements)

References 25 publications

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“…The estimated values of the R s are compared with the measured R s . Therefore, the difference between the measured values with the estimated values can be expressed by (13). Table 2 shows the comparison between the estimated R s and measured R s using method 1: at V oc , and method 2: at Q1 and Q2.…”

Section: Methodsmentioning

confidence: 99%

“…The performance of the system is investigated for different shading patterns and the results show that positioning the modules of the array according to "Su Do Ku" puzzle pattern yields improved performance under partially shaded conditions. However, this method faces a drawbacks due to ineffective dispersion of shade and significant increase in wiring requirements, these disadvantages of the "Su Do Ku" method have been enhanced using a new technique which is proposed by S. Potnure et al [13].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Seven indicators variations for multiple PV array configurations under partial shading and faulty PV conditions

et al. 2017

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The goal of this paper is to model, compare and analyze the performance of multiple photovoltaic (PV) array configurations under various partial shading and faulty PV conditions. For this purpose, a multiple PV array configurations including series (S), parallel (P), series-parallel (SP), total-cross-tied (TCT) and bridge-linked (BL) are carried out under several partial shading conditions such as, increase or decrease in the partial shading on a row of PV modules and increase or decrease in the partial shading on a column of PV modules. Additionally, in order to test the performance of each PV configuration under faulty PV conditions, from 1 to 6 Faulty PV modules have been disconnected in each PV array configuration. Several indicators such as short circuit current (I sc ), current at maximum power point (I mpp ), open circuit voltage (V oc ), voltage at maximum power point (V mpp ), series resistance (R s ), fill factor (FF) and thermal voltage (V te ) have been used to compare the obtained results from each partial shading and PV faulty condition applied to the PV system. MATLAB/Simulink software is used to perform the simulation and the analysis for each examined PV array configuration.

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Section: Methodsmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Seven indicators variations for multiple PV array configurations under partial shading and faulty PV conditions

et al. 2017

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“…In the last decade, several researchers have compared various MPPT techniques [9,10], focusing on the P-V characteristics [11][12][13][14][15], models [16][17][18][19], and methods [20][21][22][23][24][25][26][27][28][29][30][31][32][33] to track the maximum power of PV modules/arrays under partial shading conditions (PSC). The research on the PV output characteristics is mainly focused on the analysis of failure, power loss, and voltage variations in the MPPT method under the PSC.…”

Section: Introductionmentioning

confidence: 99%

Analysis of MPPT Failure and Development of an Augmented Nonlinear Controller for MPPT of Photovoltaic Systems under Partial Shading Conditions

Chen¹,

Ma²,

Wu³

et al. 2017

Applied Sciences

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Abstract:The output-voltage-power curves of photovoltaic (PV) arrays exhibit complex multi-peak shapes when local shading occurs. The existing maximum power point tracking (MPPT) algorithms to solve this multi-peak problem do not consider the possibility of tracking failures due to the time of the irradiance change. In this study, first, the reason for the failure of the global MPPT (GMPPT) algorithm is analyzed based on the PV array mathematical model and its output characteristics under partial shading conditions; then, in order to estimate the MPP voltage, an artificial neural network (ANN) is trained using environmental information such as irradiance. A hybrid MPPT method using an augmented state feedback precise linearization (AFL) controller combined with an ANN is proposed to solve problems such as the shift of the static operating point of the DC/DC boost converter. Finally, numerical simulations are conducted to validate the proposed method and eliminate the possibility of MPPT failure. The proposed hybrid MPPT method is compared with the conventional perturb and observe (P & O) method and the improved P & O method through simulations. Using the proposed neural network and nonlinear control strategy, the MPP can be tracked rapidly, accurately, and statically, proving that the method is feasible and effective.

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“…Another study has examined the power production for different PV panel connection types by using the PSO algorithm on MATLAB platform [7]. Study [8] investigates the effect of mismatch losses of PV panel array located on the large area by using the Sudoku method.…”

Section: Introductionmentioning

confidence: 99%

Solar Array System Layout Optimization for Reducing Partial Shading Effect

et al. 2016

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Solar cells are photovoltaic devices that convert sun energy directly into the electrical energy. Solar panel is composed of multiple solar cells that are combined together. Depending on the power demand, solar panels are connected to each other in series or parallel. Thus, electrical energy from the solar array systems is created to meet the needs. Solar panels are used on roof and wall systems in buildings and power plants. In solar array design, radiance, temperature, shading, surface angle and effect of series-parallel connection, which are factors affecting the operation of solar panels, should be considered. Shading significantly reduces the efficiency of a solar array system. Shading can occur entirely or partially due to dynamic or static obstacles. The effect of shading varies by location at which the solar panel is formed. In this work, design and optimization of solar arrays, positioned over a large area, having different time constant shading effects, was performed in order to minimize shading effect.

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Positioning of PV panels for reduction in line losses and mismatch losses in PV array

Cited by 158 publications

References 25 publications

Seven indicators variations for multiple PV array configurations under partial shading and faulty PV conditions

Seven indicators variations for multiple PV array configurations under partial shading and faulty PV conditions

Analysis of MPPT Failure and Development of an Augmented Nonlinear Controller for MPPT of Photovoltaic Systems under Partial Shading Conditions

Solar Array System Layout Optimization for Reducing Partial Shading Effect

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