Shading and bypass diode impacts to energy extraction of PV arrays under different converter configurations

Zheng, Huiying; Li, Shuhui; Challoo, Rajab; Proaño, Julio

doi:10.1016/j.renene.2014.01.025

Cited by 74 publications

(43 citation statements)

References 13 publications

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“…(1) a centralized set-up has been modelled by assuming a dual inverter for the entire plant (two in total) [40][41][42]; (2) a macro-block set-up has been modelled by assuming the adoption of one inverter for each subset of panel strings (13 in total); (3) a micro-block set-up has been modelled by assuming the adoption of one inverter per panel string (208 in total); (4) a micro-block baseline set-up has been devised by assuming a fixed 15% efficiency level without inverter losses.…”

Section: Power Plant Simulation Case Studymentioning

confidence: 99%

Energy Management with Support of PV Partial Shading Modelling in Micro Grid Environments

et al. 2017

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Although photovoltaic power plants are suitable local energy sources in Micro Grid environments, when large plants are involved, partial shading and inaccurate modelling of the plant can affect both the design of the Micro Grid as well as the energy management process that allows for lowering the overall Micro Grid demand towards the main grid. To investigate the issue, a Photovoltaic Plant simulation model, based on a real life power plant, and an energy management system, based on a real life Micro Grid environment, have been integrated to evaluate the performance of a Micro Grid under partial shading conditions. Using a baseline energy production model as a reference, the energy demand of the Micro Grid has been computed in sunny and partial shading conditions. The experiments reveal that an estimation based on a simplified PV model can exceed by 65% the actual production. With regards to Micro Grid design, on sunny days, the expected costs, based on a simplified PV model, can be 5.5% lower than the cost based on the double inverter model. In single cloud scenarios, the underrating can reach 28.3%. With regard to the management process, if the energy yield is estimated by means of a simplified PV model, the actual cost can be from 17.1% to 21.5% higher than the theoretical cost expected at design time.

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Section: Power Plant Simulation Case Studymentioning

confidence: 99%

Energy Management with Support of PV Partial Shading Modelling in Micro Grid Environments

et al. 2017

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“…These include, Simulation results of subsystem for STC are given in Table 2. Due to the change in environment, the temperature changes [6]. The simulation results for varying temperature keeping the irradiance constant 1000W/m 2 are shown in Table 3.…”

Section: Figure 1 Solar Panel Subsystemmentioning

confidence: 99%

Modeling of Buck Converter Models in MPPT using PID and FLC

Sharma

Jain

2015

TELKOMNIKA

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PV has become universal for power utility applications in comparison to Keywords: PV, Maximum Power Point tracking, Buck converter, MATLAB/SIMULINK, PID, FLCCopyright © 2015 Universitas Ahmad Dahlan. All rights reserved. IntroductionEnergy is the foundation stone of human development. Global awareness on saving energy and efficient use of available sources has brought concerns to achieve sustainability. Solar PV energy maintains all life on earth and is an excellent alternative to generate electricity. It is abundant, renewable, free, clean, green and requires less maintenance. Solar Renewable Energy Technology (SRET) has explored immense possibilities towards power grid and process control applications [1]. The sustainability offered by solar powered systems gain importance due to shortage of conventional fuels. Moreover, the environmental and economic impact of conventional fuels is also taken into consideration. Globally more than 1.5 billion people have no access to electricity. Dynamic Control Systems can be made to contribute a large number of electricity generations and by adopting PV technology it can be made more innovative [2].A large number of PV modules have been employed in standalone and grid electricity generation and distribution systems. A photovoltaic array consisting number of solar cells has non linear voltage-current VI characteristics. This non linearity is converged by determining an operating point or Maximum Power Point (MPP) obtained at Standard Test Conditions (STC) to deliver maximum output from panel. STC locates temperature 25°C and an irradiance of 1000 W/m 2 on surface of panel. The performance of most promising PV technology needs to be regulated in accordance with MPP. The PV system output is affected by temperature, irradiance and partial shaded conditions. These changes in environmental conditions, limit the efficiency and power output from panel. If the measured output of panel is deviated from desired set point, Maximum Power Point Tracker (MPPT) estimates and monitors MPP.The design of MPPT system to achieve regulated output is done using voltage converters and controllers for converging MPP even under distributed conditions. By the principle of Maximum power transfer theorem, maximum power is transmitted from source to load when source and load impedance are matched. This impedance mismatch is corrected using an interface termed Voltage Converter. To achieve fast and reliable MPP, Controllers keep a record of converter behavior irrespective of environmental fluctuations. Different types of converters and controllers are available for optimizing PV panel efficiency using MPPT.

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“…In 2014, Huiying Zheng et al [7] have studied the P-V characteristic of a photovoltaic module when a solar cell in the photovoltaic module is shaded with a certain degree. However, the study is conducted on a photovoltaic module without bypass diode.…”

Section: Introductionmentioning

confidence: 99%

Effects of bypass diode configurations to the maximum power of photovoltaic module

Teo¹,

Tan²,

Mok³

et al. 2017

SGCE

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Effects of bypass diode configurations to the maximum power of photovoltaic module are presented. The impacts of one, two and three bypass diodes configurations to the photovoltaic module are investigated using simulation approach. Simulink models are developed to perform all the simulations in this investigation. In the investigation, various shading patterns are applied to one, two and three bypass diodes configurations to investigate the impact of bypass diode configuration to the maximum power of photovoltaic module. Simulation results show that the bypass diode configurations doesn't affect the maximum power of the photovoltaic module under certain shading conditions. The comparison study among one, two and three bypass diodes configurations show a greater quantity of bypass diode in a photovoltaic module doesn't guarantee better performance during partial shading condit

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Shading and bypass diode impacts to energy extraction of PV arrays under different converter configurations

Cited by 74 publications

References 13 publications

Energy Management with Support of PV Partial Shading Modelling in Micro Grid Environments

Energy Management with Support of PV Partial Shading Modelling in Micro Grid Environments

Modeling of Buck Converter Models in MPPT using PID and FLC

Effects of bypass diode configurations to the maximum power of photovoltaic module

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