PRINCE WINSTON - Academia.edu (original) (raw)

Papers by PRINCE WINSTON

Iranian Journal of Science and Technology, Transactions of Electrical Engineering

Energy Conversion and Management

Sustainability

In solar photovoltaic (PV) system-based Brushless DC (BLDC) motors for water pumping application,... more In solar photovoltaic (PV) system-based Brushless DC (BLDC) motors for water pumping application, the role of DC/DC converters is very important. In order to extract the maximum power from the PV array, an efficient DC/DC converter is essential at the intermediate stage. In this work, different DC/DC converter topologies suitable for BLDC motors are proposed. The converters are supported by an optimized maximum power point tracking system to provide a reliable operation. Recent optimization algorithms such as fuzzy logic, perturb and observe, grey wolf, and whale optimization are implemented with the PI controller in maximum power point tracking to maximize the conversion efficiency. The obtained results using SEPIC, LUO, and interleaved LUO converters provide a comparative study in the case of converter output, motor parameters, and grid output. The performance analysis on three different converters and multiple optimization methods are carried out. By analyzing the performance of ...

IEEE Access, 2021

Partial shading is an unavoidable factor that reduces the performance of solar PV systems. The PV... more Partial shading is an unavoidable factor that reduces the performance of solar PV systems. The PV system receives uneven irradiation due to partial shading which causes the mismatch loss. The partial shading distracts the irradiation from the PV modules that makes the healthy modules as idle or low performing modules. The mismatch loss can be mitigated by uniformly distributing the partial shading over the PV array. In this work, L-shaped propagated array configuration method with a new dynamic reconfiguration algorithm have proposed for enhancing the energy conversion under the partial shading conditions. A new kind of array configuration is implemented in a 4 × 4 PV array for the better shade dispersion. Further, a dynamic reconfiguration algorithm is employed to disperse the effect of partial shading. The combination of new array configuration and reconfiguration method is simulated in MATLAB/Simulink R and implemented in hardware. The outputs are measured under all possible shading patterns and validated with the outputs of convention methods for observing the enhanced energy conversion rate of the proposed system. INDEX TERMS Array configuration, futoshiki puzzle pattern, mismatch loss, partial shading, PV array reconfiguration, total cross tied (TCT), sudoku pattern.

The use of polymer composite insulators has grown in the recent past power generation, transmissi... more The use of polymer composite insulators has grown in the recent past power generation, transmission and distribution. There are many materials which are being used in polymer composite insulator and several testing is needed. But, it is time consuming to test the material and requires lots of equipment. Even each and every insulator design has to undergo a series of test before using it in transmission and distribution lines. In order to reduce the cycle time of design work and the cost of prototype testing, technical software packages are used. Once the design was done, it can be tested under various parameters in the package itself and no direct inspection or testing is needed. Here, COMSOL-Multiphysics technical package is used to model the insulators under several applied voltages and relative electrical stress. The package is used to analyze different shed placements for various profiles based on creepage distance. The insulators are designed according to the standard specifica...

Nowerdays, due to the penetration of power electronics based loads and microprocessor based contr... more Nowerdays, due to the penetration of power electronics based loads and microprocessor based controlled loads. We have to give more importance to power Quality problems. In order to improve the power quality, the sources of power quality disturbances should be recognized and classified earlier. So many techniques are proposed so far in many research papers under feature extraction and classification. This paper gives a survey of the various papers and it will be use full for the researchers to know about the various methods discussed and helps to do the further work in this area.

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Energy, 2013

It has been found that by using Pulse with modulation technique can greatly reduce the harmonics ... more It has been found that by using Pulse with modulation technique can greatly reduce the harmonics distortions generated by the PV inverter. Harmonics reduction is the main consideration in three phase squirrel cage induction motor. We can improve the performance of the three phase squirrel cage Induction motor by the reduction of THD. In this research work, the harmonic distortion of the three phase induction motor was measured in terms of THD by Simulation model and the results of the Multiple Pulse Width Modulation and Sinusoidal Pulse Width Modulation inputs were compared to find out the lowest THD value. By using the PWM technique on the Three Phase Induction motor there was reduction in the VTHD. In order to select lowest THD value for a particular frequency, Neural Network tool are used. The selected modulation index and frequency is given to the input of the inverter circuit. At this condition we can connect the PV circuit to the grid circuit.

Przegląd Elektrotechniczny, 2012

Some of the Industrial DC motor drives use four quadrant chopper. This letter proposes a new sche... more Some of the Industrial DC motor drives use four quadrant chopper. This letter proposes a new scheme of chopper configuration which leads to energy conservation in DC motor drive. The proposed scheme needs some modifications in the switching device configuration such as combining a MOSFET switch with a relay and this modification leads to energy saving. The simulation results show the superiority of the new method suggested in this letter. Streszczenie. W artykule przedstawiono nową topologie choppera, pozwalającą uzyskac oszczednośc energii w napedzie z silnikiem DC. Proponowana zmiana polega dolączeniu przekaźnikow do obwodow tranzystorow MOSFET. Zaprezentowano wyniki symulacyjne. (Zasilanie napedu z silnikiem DC z choppera z obwodem oszczedzającym energie)

Solar Desalination Technology, 2019

This manuscript brings out with an impact of insulation on energy and exergy effectiveness of a s... more This manuscript brings out with an impact of insulation on energy and exergy effectiveness of a solar photovoltaic panel incorporated inclined solar still. This research is mainly focuses on the studies of the solar still performance from the different parameter such as solar still yield, thermal efficiency, exergy efficiency, solar panel electrical, exergy and thermal efficiency and overall daily thermal and exergy efficiency of the solar panel integrated inclined solar still. The maximum distilled water of 6.2 kg was achieved as the solar panel integrated inclined still with the bottom and the sidewall insulation. The daily yield of 3.3, 4.1 and 6.2 kg, the daily energy effectiveness of 31.32, 38.81, and 57.88 and the daily exergy effectiveness of 1.72, 2.21, and 4.61% was obtained from the solar panel integrated solar still without, with the sidewall, and with the bottom and sidewall insulation, respectively.

Circuits and Systems, 2016

In this paper new technique is developed to monitor the health status of the PV panels in the arr... more In this paper new technique is developed to monitor the health status of the PV panels in the array. For finding the health status short circuit current is measured continuously over a fixed time period. This technique can classify the health status into four categories such as Healthy, Low Fault, Medium Fault and High Fault. By this classification faulty operation can be rectified and power generation may be improved. In case of high faults, PV panels can be protected. The cost requirement for the implementation is very low. The proposed technique is implemented in MATLAB Simulation and hardware. The array considered in this paper is 2 × 2 Series Parallel.

IEEE Access, 2021

For lifelong and reliable operation, advanced solar photovoltaic (PV) equipment is designed to mi... more For lifelong and reliable operation, advanced solar photovoltaic (PV) equipment is designed to minimize the faults. Irrespectively, the panel degradation makes the fault inevitable. Thus, the quick detection and classification of panel degradation is pivotal. Among various problems that promote panel degradation, hot spots and micro-cracks are the prominent reliability problems which affect the PV performance. When these types of faults occur in a solar cell, the panel gets heated up and it reduces the power generation hence its efficiency considerably. In this study, the effect of the hotspot is studied and a comparative fault detection method is proposed to detect different PV modules affected by micro-cracks and hotspots. The classification process is accomplished by utilizing Feed Forward Back Propagation Neural Network technique and Support Vector Machine (SVM) techniques. The investigation of both the techniques permits a complete analysis of choosing an effective technique in terms of accuracy outcome. Six input parameters like percentage of power loss (PPL), Open-circuit voltage (V OC), Short circuit current (I SC), Irradiance (I RR), Panel temperature and Internal impedance (Z) are accounted to detect the faults. Experimental investigation and simulations using MATLAB are carried out to detect five categories of faulty and healthy panels. Both methods exhibited a promising result with an average accuracy of 87% for feed-forward back propagation neural network and 99% SVM technique which exposes the potential of this proposed technique. INDEX TERMS Binary tree, feed forward back propagation neural network, hot-spotting, micro crack, PV module, support vector machine.

IEEE Access, 2021

The Photovoltaic (PV) cell converts a portion of incident irradiation of visible wavelength into ... more The Photovoltaic (PV) cell converts a portion of incident irradiation of visible wavelength into electricity and the remaining into heat, thereby decreasing the electrical efficiency. Hence, it is necessary to transfer the heat generated in the module by a cooling medium, thereby maintaining the operating temperature within the operating limit. This study discusses the feasibility of cooling the monocrystalline and polycrystalline modules by using rehashed edible oil (coconut oil, sesame oil, and peanut oil) with an integrated oil tank attached to the backside of the module. This study has used the environmentally friendly rehashed edible oil as a coolant, which can be used as an alternate to the toxic mineral oil. Hence, this study can prevent the consumption of reused edible oil along with the food, which causes harmful effects on human health. The rehashed edible oil flows from the storage tank through the backside of the module and is collected in another storage tank, which can be reused. Also, the performance of the monocrystalline and polycrystalline modules under different rehashed edible oil shows a significant reduction in module temperature and improvement in the efficiency of the module. The performance of the peanut oil is found to be superior in improving the performance by 14.0 % and 16.8 % on monocrystalline and polycrystalline modules respectively. INDEX TERMS Module temperature, rehashed edible oil, environmental friendly, cooling, output power, efficiency. NOMENCLATURE P m Maximum power. V mp Voltage at maximum power. I mp Current at maximum power. V oc Open circuit voltage. I sc Short circuit current. The associate editor coordinating the review of this manuscript and approving it for publication was Alon Kuperman .

Marine Technology Society Journal, 2020

Fulfilling the increasing demand for electricity is a huge challenge worldwide. At the same time,... more Fulfilling the increasing demand for electricity is a huge challenge worldwide. At the same time, dependence on fossil fuels for power generation and its enervation is becoming a severe concern as fossil fuels will be unavailable after 25 years. Hence, research needs to be focused on minimizing the dependence on fossil fuels for power generation especially in the shipping industry. This study aims to implement the solar photovoltaic (PV) system in a ship so as to investigate the possible difficulties related to fault detection and islanding protection methods of a direct current (DC)grid-tied solar PV system in a ship. The simulations have been modeled using an Arduino Uno R3 with IC ATMEGA 328P controller in Proteus PCB Design and Simulation software. In faulty conditions, the impact of the faults on the grid is very critical. Hence, it is essential to identify faults immediately and island the grid.

Heat Transfer, 2020

In this paper, a year around energy efficiency (EnE) and economic analysis of single slope solar ... more In this paper, a year around energy efficiency (EnE) and economic analysis of single slope solar still (SSSS), the single slope solar still with glass cooling (SSSSGC), the single slope solar still with basin heating (SSSSBH), and the single slope solar still with glass cooling and basin heating (SSSSGCBH) was carried out based on the distilled water production. The annual yield production from the SSSS, SSSSGC, SSSSBH, and SSSSGCBH were 476.16, 637.44, 970.24, and 1167.36 kg, respectively. The yearly yield produced from the SSSSBH and SSSSGCBH was increased by 50.92% and 59.21%, respectively, as compared with the SSSS. Moreover, the annual EnE of the SSSSGCBH was 28.75%. However, the EnE of the SSSS was 11.73%. Also, freshwater making cost is found to be 18.9, 24.9, 37.9, and 45.6 Rs/day for the SSSS, SSSSGC, SSSSBH, and SSSSGCBH, respectively, if the buying cost of freshwater is Rs 10.

Journal of Natural Fibers, 2020

In this study, the electrical, thermal, and mechanical properties of hybrid natural fiber composi... more In this study, the electrical, thermal, and mechanical properties of hybrid natural fiber composite are taken under consideration. Fly ash waste is used as the filler material. Unsaturated polyester resin is used as the matrix material to bind the composite. Alkali-treated Phaseolus vulgaris fiber (PVF) (5% NaOH for 45 min) is taken as the primary filler. Nanosilica synthesized is added to the composite samples at a constant percentage (1%). Samples of various weight percentages are prepared (2%, 4%, 6%, 8%, and 10% of PVF) and studied. Dielectric strength test for electrical property, thermal conductivity test for the thermal property, mechanical tests like tensile strength, Brinell hardness, Izod impact tests, and water absorption test are also taken under consideration. The composite showed a regular increasing trend in mechanical and electrical properties with varying weight percentages until 6% PVF; afterward, a decreasing trend in the mechanical and electrical properties of the composite was found with greater weight percentages. Whereas for thermal conductivity and water absorption tests, the results showed a regular decreasing trend until 6% PVF; afterward an increasing trend was found. It is found that the composite of 6% PVF and 1% SiO 2 shows better electrical, thermal, and mechanical properties. 摘要 本研究考虑天然纤维混杂复合材料之电、热及力学性质. 粉煤灰废料用作 填料. 以不饱和聚酯树脂为基体材料对复合材料进行了粘结. 以碱处理的 菜豆纤维(PVF)(5%NaOH，45min)为主要填料. 合成的纳米二氧化硅 以1%的比例加入到复合材料中. 制备了不同重量百分比的样品(PVF的2、 4、6、8和10%)，并对其进行了研究. 还考虑了电气性能的介电强度试 验、热性能的导热性试验、拉伸强度、布氏硬度、Izod冲击试验和吸水性 试验等机械试验. 复合材料的力学性能和电学性能随重量百分比的变化呈 规律性的增加趋势，直到6%PVF后，随着重量百分比的增加，复合材料的 力学性能和电学性能下降. 而对于热导率和吸水率，则表现出规律性的下 降，直到6%PVF后才开始上升. 结果表明，6%PVF和1%SiO2的复合材料具 有较好的电学、热学和力学性能.

Groundwater for Sustainable Development, 2020

Effect of water depth and insulation on the productivity of an acrylic pyramid solar still-An exp... more Effect of water depth and insulation on the productivity of an acrylic pyramid solar still-An experimental study,

Solar Energy, 2020

The output power produced by solar Photovoltaic (PV) array is reduced drastically by partial shad... more 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 existing array configurations, six novel PVATs are proposed to address the partial shading effect. A 4 × 4, 4 kW solar PV array which consists of sixteen panel of each 250 W rating is considered in this paper. The proposed PVATs are simulated in MATLAB/Simulink® to assess the performance. The results obtained from the simulation are compared with the conventional PVATs and suitable topologies which give best performance during various PSCs are identified. The result comparison shows that the modified total cross-tied (TCT) configuration performs well to extract more power in most of the PSCs. For the Short and Wide PSC, the proposed TCT improves the output power of PVAT by 105% compared to the existing TCT topology. The proposed method is also validated experimentally using 2 × 2 TCT PV array topology and the output waveforms are presented in this paper. This research would be helpful for the PV power plant installers to identify a suitable array configuration.

Journal of Natural Fibers, 2019

This study investigates the dielectric efficiency of a composite prepared using a fiber extracted... more This study investigates the dielectric efficiency of a composite prepared using a fiber extracted from Phaseolus vulgaris. The extraction of fiber was statistically modeled using face-centered central composite design. The concentration of NaOH and extraction time was taken as the process variables and dielectric strength was taken as the response. The numerically optimized model for the extraction of fiber from Phaseolus vulgaris of alkali treatment showed 14.325 kV/cm as dielectric strength of initial NaOH concentration of 3% and time period of 51 min. The model was significant with R 2 = 0.9323 and adjusted R 2 = 0.884. The linear, quadratic & interactive relationship between the response (dielectric strength) and variables (NaOH & time) was also established. This study explains the importance of NaOH and time period in establishing the fiber extraction by the alkali treatment process. 摘要 本研究研究使用从西多卢斯提取的纤维制备的复合材料的电介质效率. 纤维 的提取采用以面为中心的中央复合设计进行统计建模. 以NaOH的浓度和提 取时间作为过程变量和介电强度作为响应. 碱处理的Phaseolus纯化纤维提取 数值优化模型显示，初始NaOH浓度为3%，周期为51分钟，介电强度为 14.325千伏/厘米. 该模型在 R2 = 0.9323 和调整后的 R2 = 0.884 时显著. 建立了 响应(电强度)和变量(NaOH + time)之间的线性、二次和交互关系. 本研 究阐述了NaOH和时间段在碱处理工艺建立纤维提取过程中的重要性.

Environmental Science and Pollution Research, 2019

This context is about enhancing the freshwater production of a single slope solar desalination st... more This context is about enhancing the freshwater production of a single slope solar desalination still (SSSDS) using water film cooling over the glass cover and using hybrid natural fibre composite (HNFC) insulation. In contrast to the conventional insulations, we proposed the HNFC insulation; this composite was made of natural fibre Pharsalus vulgaris (6 %) and nanosilica (1 %) with unsaturated polyester resin. In this study, conventional SSSDS and proposed SSSDS with enhanced evaporation and condensation have been designed. The same was built with native materials. A conventional and proposed type SSSDS was subjected to the same experimental condition. The experimental result showed that using water film cooling over glass cover and HNFC insulation at 0.5 cm depth caused a 35% increase in the amount of distilled water when compared with the conventional type SSSDS with polystyrene-Styrofoam (thermocol) insulation. Water film cooling over glass cover and HNFC insulation at 1 cm depth caused a 21% increase in the amount of distilled water when compared with the conventional type SSSDS with thermocol insulation. The conventional type solar desalination still with thermocol insulation at 0.5 and 1 cm depth yields are 1.665 and 1.171 l/m 2 /day, respectively, and the proposed solar desalination still with water film cooling over glass cover and HNFC insulation at 0.5 and 1 cm depth yields are 2.253 and 1.420 l/m 2 /day, respectively.

Materials Today: Proceedings, 2017

Scarceness for water exists in many countries even though three fourth of the earth is covered by... more Scarceness for water exists in many countries even though three fourth of the earth is covered by water. The reason behind this is the rapid enlargement of industry and populace worldwide. Solar still is the only efficient solution for water trouble in hot climatic conditional areas where there is scarcity of water and electricity. Solar still is a very simple solar device that is used for converting the available salted water into potable water. This paper presents a comparative study of single basin single slope aluminium finned acrylic solar still and single basin single slope galvanised iron solar still. By using acrylic sheet as casing as it has very low thermal conductivity, it reduces the loss of heat from the still basin to the bottom which leads to increase in the rate of evaporation of water. The daily productivity of single basin single slope acrylic solar still is 660ML/0.25M 2 /day and galvanised iron solar still is 585 ML/ 0.25M 2

Iranian Journal of Science and Technology, Transactions of Electrical Engineering

Energy Conversion and Management

Sustainability

In solar photovoltaic (PV) system-based Brushless DC (BLDC) motors for water pumping application,... more In solar photovoltaic (PV) system-based Brushless DC (BLDC) motors for water pumping application, the role of DC/DC converters is very important. In order to extract the maximum power from the PV array, an efficient DC/DC converter is essential at the intermediate stage. In this work, different DC/DC converter topologies suitable for BLDC motors are proposed. The converters are supported by an optimized maximum power point tracking system to provide a reliable operation. Recent optimization algorithms such as fuzzy logic, perturb and observe, grey wolf, and whale optimization are implemented with the PI controller in maximum power point tracking to maximize the conversion efficiency. The obtained results using SEPIC, LUO, and interleaved LUO converters provide a comparative study in the case of converter output, motor parameters, and grid output. The performance analysis on three different converters and multiple optimization methods are carried out. By analyzing the performance of ...

IEEE Access, 2021

Partial shading is an unavoidable factor that reduces the performance of solar PV systems. The PV... more Partial shading is an unavoidable factor that reduces the performance of solar PV systems. The PV system receives uneven irradiation due to partial shading which causes the mismatch loss. The partial shading distracts the irradiation from the PV modules that makes the healthy modules as idle or low performing modules. The mismatch loss can be mitigated by uniformly distributing the partial shading over the PV array. In this work, L-shaped propagated array configuration method with a new dynamic reconfiguration algorithm have proposed for enhancing the energy conversion under the partial shading conditions. A new kind of array configuration is implemented in a 4 × 4 PV array for the better shade dispersion. Further, a dynamic reconfiguration algorithm is employed to disperse the effect of partial shading. The combination of new array configuration and reconfiguration method is simulated in MATLAB/Simulink R and implemented in hardware. The outputs are measured under all possible shading patterns and validated with the outputs of convention methods for observing the enhanced energy conversion rate of the proposed system. INDEX TERMS Array configuration, futoshiki puzzle pattern, mismatch loss, partial shading, PV array reconfiguration, total cross tied (TCT), sudoku pattern.

The use of polymer composite insulators has grown in the recent past power generation, transmissi... more The use of polymer composite insulators has grown in the recent past power generation, transmission and distribution. There are many materials which are being used in polymer composite insulator and several testing is needed. But, it is time consuming to test the material and requires lots of equipment. Even each and every insulator design has to undergo a series of test before using it in transmission and distribution lines. In order to reduce the cycle time of design work and the cost of prototype testing, technical software packages are used. Once the design was done, it can be tested under various parameters in the package itself and no direct inspection or testing is needed. Here, COMSOL-Multiphysics technical package is used to model the insulators under several applied voltages and relative electrical stress. The package is used to analyze different shed placements for various profiles based on creepage distance. The insulators are designed according to the standard specifica...

Nowerdays, due to the penetration of power electronics based loads and microprocessor based contr... more Nowerdays, due to the penetration of power electronics based loads and microprocessor based controlled loads. We have to give more importance to power Quality problems. In order to improve the power quality, the sources of power quality disturbances should be recognized and classified earlier. So many techniques are proposed so far in many research papers under feature extraction and classification. This paper gives a survey of the various papers and it will be use full for the researchers to know about the various methods discussed and helps to do the further work in this area.

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Energy, 2013

It has been found that by using Pulse with modulation technique can greatly reduce the harmonics ... more It has been found that by using Pulse with modulation technique can greatly reduce the harmonics distortions generated by the PV inverter. Harmonics reduction is the main consideration in three phase squirrel cage induction motor. We can improve the performance of the three phase squirrel cage Induction motor by the reduction of THD. In this research work, the harmonic distortion of the three phase induction motor was measured in terms of THD by Simulation model and the results of the Multiple Pulse Width Modulation and Sinusoidal Pulse Width Modulation inputs were compared to find out the lowest THD value. By using the PWM technique on the Three Phase Induction motor there was reduction in the VTHD. In order to select lowest THD value for a particular frequency, Neural Network tool are used. The selected modulation index and frequency is given to the input of the inverter circuit. At this condition we can connect the PV circuit to the grid circuit.

Przegląd Elektrotechniczny, 2012

Some of the Industrial DC motor drives use four quadrant chopper. This letter proposes a new sche... more Some of the Industrial DC motor drives use four quadrant chopper. This letter proposes a new scheme of chopper configuration which leads to energy conservation in DC motor drive. The proposed scheme needs some modifications in the switching device configuration such as combining a MOSFET switch with a relay and this modification leads to energy saving. The simulation results show the superiority of the new method suggested in this letter. Streszczenie. W artykule przedstawiono nową topologie choppera, pozwalającą uzyskac oszczednośc energii w napedzie z silnikiem DC. Proponowana zmiana polega dolączeniu przekaźnikow do obwodow tranzystorow MOSFET. Zaprezentowano wyniki symulacyjne. (Zasilanie napedu z silnikiem DC z choppera z obwodem oszczedzającym energie)

Solar Desalination Technology, 2019

This manuscript brings out with an impact of insulation on energy and exergy effectiveness of a s... more This manuscript brings out with an impact of insulation on energy and exergy effectiveness of a solar photovoltaic panel incorporated inclined solar still. This research is mainly focuses on the studies of the solar still performance from the different parameter such as solar still yield, thermal efficiency, exergy efficiency, solar panel electrical, exergy and thermal efficiency and overall daily thermal and exergy efficiency of the solar panel integrated inclined solar still. The maximum distilled water of 6.2 kg was achieved as the solar panel integrated inclined still with the bottom and the sidewall insulation. The daily yield of 3.3, 4.1 and 6.2 kg, the daily energy effectiveness of 31.32, 38.81, and 57.88 and the daily exergy effectiveness of 1.72, 2.21, and 4.61% was obtained from the solar panel integrated solar still without, with the sidewall, and with the bottom and sidewall insulation, respectively.

Circuits and Systems, 2016

In this paper new technique is developed to monitor the health status of the PV panels in the arr... more In this paper new technique is developed to monitor the health status of the PV panels in the array. For finding the health status short circuit current is measured continuously over a fixed time period. This technique can classify the health status into four categories such as Healthy, Low Fault, Medium Fault and High Fault. By this classification faulty operation can be rectified and power generation may be improved. In case of high faults, PV panels can be protected. The cost requirement for the implementation is very low. The proposed technique is implemented in MATLAB Simulation and hardware. The array considered in this paper is 2 × 2 Series Parallel.

IEEE Access, 2021

For lifelong and reliable operation, advanced solar photovoltaic (PV) equipment is designed to mi... more For lifelong and reliable operation, advanced solar photovoltaic (PV) equipment is designed to minimize the faults. Irrespectively, the panel degradation makes the fault inevitable. Thus, the quick detection and classification of panel degradation is pivotal. Among various problems that promote panel degradation, hot spots and micro-cracks are the prominent reliability problems which affect the PV performance. When these types of faults occur in a solar cell, the panel gets heated up and it reduces the power generation hence its efficiency considerably. In this study, the effect of the hotspot is studied and a comparative fault detection method is proposed to detect different PV modules affected by micro-cracks and hotspots. The classification process is accomplished by utilizing Feed Forward Back Propagation Neural Network technique and Support Vector Machine (SVM) techniques. The investigation of both the techniques permits a complete analysis of choosing an effective technique in terms of accuracy outcome. Six input parameters like percentage of power loss (PPL), Open-circuit voltage (V OC), Short circuit current (I SC), Irradiance (I RR), Panel temperature and Internal impedance (Z) are accounted to detect the faults. Experimental investigation and simulations using MATLAB are carried out to detect five categories of faulty and healthy panels. Both methods exhibited a promising result with an average accuracy of 87% for feed-forward back propagation neural network and 99% SVM technique which exposes the potential of this proposed technique. INDEX TERMS Binary tree, feed forward back propagation neural network, hot-spotting, micro crack, PV module, support vector machine.

IEEE Access, 2021

The Photovoltaic (PV) cell converts a portion of incident irradiation of visible wavelength into ... more The Photovoltaic (PV) cell converts a portion of incident irradiation of visible wavelength into electricity and the remaining into heat, thereby decreasing the electrical efficiency. Hence, it is necessary to transfer the heat generated in the module by a cooling medium, thereby maintaining the operating temperature within the operating limit. This study discusses the feasibility of cooling the monocrystalline and polycrystalline modules by using rehashed edible oil (coconut oil, sesame oil, and peanut oil) with an integrated oil tank attached to the backside of the module. This study has used the environmentally friendly rehashed edible oil as a coolant, which can be used as an alternate to the toxic mineral oil. Hence, this study can prevent the consumption of reused edible oil along with the food, which causes harmful effects on human health. The rehashed edible oil flows from the storage tank through the backside of the module and is collected in another storage tank, which can be reused. Also, the performance of the monocrystalline and polycrystalline modules under different rehashed edible oil shows a significant reduction in module temperature and improvement in the efficiency of the module. The performance of the peanut oil is found to be superior in improving the performance by 14.0 % and 16.8 % on monocrystalline and polycrystalline modules respectively. INDEX TERMS Module temperature, rehashed edible oil, environmental friendly, cooling, output power, efficiency. NOMENCLATURE P m Maximum power. V mp Voltage at maximum power. I mp Current at maximum power. V oc Open circuit voltage. I sc Short circuit current. The associate editor coordinating the review of this manuscript and approving it for publication was Alon Kuperman .

Marine Technology Society Journal, 2020

Fulfilling the increasing demand for electricity is a huge challenge worldwide. At the same time,... more Fulfilling the increasing demand for electricity is a huge challenge worldwide. At the same time, dependence on fossil fuels for power generation and its enervation is becoming a severe concern as fossil fuels will be unavailable after 25 years. Hence, research needs to be focused on minimizing the dependence on fossil fuels for power generation especially in the shipping industry. This study aims to implement the solar photovoltaic (PV) system in a ship so as to investigate the possible difficulties related to fault detection and islanding protection methods of a direct current (DC)grid-tied solar PV system in a ship. The simulations have been modeled using an Arduino Uno R3 with IC ATMEGA 328P controller in Proteus PCB Design and Simulation software. In faulty conditions, the impact of the faults on the grid is very critical. Hence, it is essential to identify faults immediately and island the grid.

Heat Transfer, 2020

In this paper, a year around energy efficiency (EnE) and economic analysis of single slope solar ... more In this paper, a year around energy efficiency (EnE) and economic analysis of single slope solar still (SSSS), the single slope solar still with glass cooling (SSSSGC), the single slope solar still with basin heating (SSSSBH), and the single slope solar still with glass cooling and basin heating (SSSSGCBH) was carried out based on the distilled water production. The annual yield production from the SSSS, SSSSGC, SSSSBH, and SSSSGCBH were 476.16, 637.44, 970.24, and 1167.36 kg, respectively. The yearly yield produced from the SSSSBH and SSSSGCBH was increased by 50.92% and 59.21%, respectively, as compared with the SSSS. Moreover, the annual EnE of the SSSSGCBH was 28.75%. However, the EnE of the SSSS was 11.73%. Also, freshwater making cost is found to be 18.9, 24.9, 37.9, and 45.6 Rs/day for the SSSS, SSSSGC, SSSSBH, and SSSSGCBH, respectively, if the buying cost of freshwater is Rs 10.

Journal of Natural Fibers, 2020

In this study, the electrical, thermal, and mechanical properties of hybrid natural fiber composi... more In this study, the electrical, thermal, and mechanical properties of hybrid natural fiber composite are taken under consideration. Fly ash waste is used as the filler material. Unsaturated polyester resin is used as the matrix material to bind the composite. Alkali-treated Phaseolus vulgaris fiber (PVF) (5% NaOH for 45 min) is taken as the primary filler. Nanosilica synthesized is added to the composite samples at a constant percentage (1%). Samples of various weight percentages are prepared (2%, 4%, 6%, 8%, and 10% of PVF) and studied. Dielectric strength test for electrical property, thermal conductivity test for the thermal property, mechanical tests like tensile strength, Brinell hardness, Izod impact tests, and water absorption test are also taken under consideration. The composite showed a regular increasing trend in mechanical and electrical properties with varying weight percentages until 6% PVF; afterward, a decreasing trend in the mechanical and electrical properties of the composite was found with greater weight percentages. Whereas for thermal conductivity and water absorption tests, the results showed a regular decreasing trend until 6% PVF; afterward an increasing trend was found. It is found that the composite of 6% PVF and 1% SiO 2 shows better electrical, thermal, and mechanical properties. 摘要 本研究考虑天然纤维混杂复合材料之电、热及力学性质. 粉煤灰废料用作 填料. 以不饱和聚酯树脂为基体材料对复合材料进行了粘结. 以碱处理的 菜豆纤维(PVF)(5%NaOH，45min)为主要填料. 合成的纳米二氧化硅 以1%的比例加入到复合材料中. 制备了不同重量百分比的样品(PVF的2、 4、6、8和10%)，并对其进行了研究. 还考虑了电气性能的介电强度试 验、热性能的导热性试验、拉伸强度、布氏硬度、Izod冲击试验和吸水性 试验等机械试验. 复合材料的力学性能和电学性能随重量百分比的变化呈 规律性的增加趋势，直到6%PVF后，随着重量百分比的增加，复合材料的 力学性能和电学性能下降. 而对于热导率和吸水率，则表现出规律性的下 降，直到6%PVF后才开始上升. 结果表明，6%PVF和1%SiO2的复合材料具 有较好的电学、热学和力学性能.

Groundwater for Sustainable Development, 2020

Effect of water depth and insulation on the productivity of an acrylic pyramid solar still-An exp... more Effect of water depth and insulation on the productivity of an acrylic pyramid solar still-An experimental study,

Solar Energy, 2020

The output power produced by solar Photovoltaic (PV) array is reduced drastically by partial shad... more 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 existing array configurations, six novel PVATs are proposed to address the partial shading effect. A 4 × 4, 4 kW solar PV array which consists of sixteen panel of each 250 W rating is considered in this paper. The proposed PVATs are simulated in MATLAB/Simulink® to assess the performance. The results obtained from the simulation are compared with the conventional PVATs and suitable topologies which give best performance during various PSCs are identified. The result comparison shows that the modified total cross-tied (TCT) configuration performs well to extract more power in most of the PSCs. For the Short and Wide PSC, the proposed TCT improves the output power of PVAT by 105% compared to the existing TCT topology. The proposed method is also validated experimentally using 2 × 2 TCT PV array topology and the output waveforms are presented in this paper. This research would be helpful for the PV power plant installers to identify a suitable array configuration.

Journal of Natural Fibers, 2019

This study investigates the dielectric efficiency of a composite prepared using a fiber extracted... more This study investigates the dielectric efficiency of a composite prepared using a fiber extracted from Phaseolus vulgaris. The extraction of fiber was statistically modeled using face-centered central composite design. The concentration of NaOH and extraction time was taken as the process variables and dielectric strength was taken as the response. The numerically optimized model for the extraction of fiber from Phaseolus vulgaris of alkali treatment showed 14.325 kV/cm as dielectric strength of initial NaOH concentration of 3% and time period of 51 min. The model was significant with R 2 = 0.9323 and adjusted R 2 = 0.884. The linear, quadratic & interactive relationship between the response (dielectric strength) and variables (NaOH & time) was also established. This study explains the importance of NaOH and time period in establishing the fiber extraction by the alkali treatment process. 摘要 本研究研究使用从西多卢斯提取的纤维制备的复合材料的电介质效率. 纤维 的提取采用以面为中心的中央复合设计进行统计建模. 以NaOH的浓度和提 取时间作为过程变量和介电强度作为响应. 碱处理的Phaseolus纯化纤维提取 数值优化模型显示，初始NaOH浓度为3%，周期为51分钟，介电强度为 14.325千伏/厘米. 该模型在 R2 = 0.9323 和调整后的 R2 = 0.884 时显著. 建立了 响应(电强度)和变量(NaOH + time)之间的线性、二次和交互关系. 本研 究阐述了NaOH和时间段在碱处理工艺建立纤维提取过程中的重要性.

Environmental Science and Pollution Research, 2019

This context is about enhancing the freshwater production of a single slope solar desalination st... more This context is about enhancing the freshwater production of a single slope solar desalination still (SSSDS) using water film cooling over the glass cover and using hybrid natural fibre composite (HNFC) insulation. In contrast to the conventional insulations, we proposed the HNFC insulation; this composite was made of natural fibre Pharsalus vulgaris (6 %) and nanosilica (1 %) with unsaturated polyester resin. In this study, conventional SSSDS and proposed SSSDS with enhanced evaporation and condensation have been designed. The same was built with native materials. A conventional and proposed type SSSDS was subjected to the same experimental condition. The experimental result showed that using water film cooling over glass cover and HNFC insulation at 0.5 cm depth caused a 35% increase in the amount of distilled water when compared with the conventional type SSSDS with polystyrene-Styrofoam (thermocol) insulation. Water film cooling over glass cover and HNFC insulation at 1 cm depth caused a 21% increase in the amount of distilled water when compared with the conventional type SSSDS with thermocol insulation. The conventional type solar desalination still with thermocol insulation at 0.5 and 1 cm depth yields are 1.665 and 1.171 l/m 2 /day, respectively, and the proposed solar desalination still with water film cooling over glass cover and HNFC insulation at 0.5 and 1 cm depth yields are 2.253 and 1.420 l/m 2 /day, respectively.

Materials Today: Proceedings, 2017

Scarceness for water exists in many countries even though three fourth of the earth is covered by... more Scarceness for water exists in many countries even though three fourth of the earth is covered by water. The reason behind this is the rapid enlargement of industry and populace worldwide. Solar still is the only efficient solution for water trouble in hot climatic conditional areas where there is scarcity of water and electricity. Solar still is a very simple solar device that is used for converting the available salted water into potable water. This paper presents a comparative study of single basin single slope aluminium finned acrylic solar still and single basin single slope galvanised iron solar still. By using acrylic sheet as casing as it has very low thermal conductivity, it reduces the loss of heat from the still basin to the bottom which leads to increase in the rate of evaporation of water. The daily productivity of single basin single slope acrylic solar still is 660ML/0.25M 2 /day and galvanised iron solar still is 585 ML/ 0.25M 2