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Power Quality Improvement and Signal Conditioning of PV Array and Grid Interfaced Off-board Charger for Electric Vehicles with V2G and G2V Capabilities

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Chinese Journal of Electrical Engineering 2023年第4期9卷 132-143页

作者： Shailendra kumar Tapesh Upadhyay Om Hari gupta Department of Electrical Engineering Indian Institute of TechnologyBhilai 492015India Department of Electrical Engineering Maulana Azad National Institute of Technology(MANIT)Bhopal 462003India Department of Electrical Engineering National Institute of TechnologyJamshedpur 831014India

In this work,we present a photovoltaic(PV)-based off-board charging system integrated with the grid using a voltage source converter(VSC).The control of the grid-tied off-board charger is derived from the joint logarithmic hyperbolic cosine robust sparse adaptive filter(JLHCAF)*** algorithm effectively tracks the fundamental component of the load current in a short duration,providing a good dynamic *** to its robustness against impulsive interference,the JLHCAF outperforms other sparsity-aware robust algorithms The cascaded proportional-integral(PI)controller is used to control the bidirectional buck-boost converter for electric vehicle(EV)charging/discharging,which acts in buck operation if the EV is being charged and in boost operation if it is *** reference DC link voltage for the controller is derived by using adaptive MPPT *** bidirectional properties of the system enable various functions,including grid-to-vehicle(G2V),vehicle-to-grid(V2G),PV source-to-grid(PV2G),vehicle-to-home(V2H),and PV source-to-vehicle(PV2V)***,the system can supply power to critical nonlinear *** control strategy ensures compliance with the power quality requirements set by the IEEE standard,as demonstrated in the *** validate the effectiveness of the proposed system,we conducted tests under dynamic conditions by disconnecting and reconnecting household ***,the off-board charging system was subjected to actual conditions,such as variations in solar PV insolation,and its steady-state performance was evaluated through simulation and laboratory experimental *** results,including total harmonic distortion(THD),support the validation of the developed charging system.

关键词： Grid to vehicle(G2V) vehicle to grid(V2G) off-board charger(OBC) power quality total harmonic distortion(THD) electrical vehicles(EVs)

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Impact of open dumping of municipal solid waste on soil properties in mountainous region

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第4期10卷 725-739页

作者： Anchal Sharma Ashok kumar gupta Rajiv Ganguly Department of Civil Engineering Jaypee University of Information Technology

This paper presents the effect of open dumping of municipal solid waste(MSW) on soil characteristics in the mountainous region of Himachal Pradesh, India. The solid waste of dumpsite contains various complex characteristics with organic fractions of the highest proportions. As leachate percolates into the soil, it migrates contaminants into the soil and affects soil stability and strength. The study includes the geotechnical investigation of dump soil characteristics and its comparison with the natural soil samples taken from outside the proximity of dumpsites. The geochemical analysis of dumpsite soil samples was also carried out by scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS).Visual inspection revealed that the MSW consists of high fraction of organics, followed by paper. The soil samples were collected from five trial pits in the dumpsites at depths of 0.5 m, 1 m and 1.5 m. Then the collected soil samples were subjected to specific gravity test, grain size analysis, Atterberg’s limit test,compaction test, direct shear test, California bearing ratio(CBR) test and permeability analysis. The study indicated that the dumpsite soils from four study regions show decreasing trends in the values of maximum dry density(MDD), specific gravity, cohesion and CBR, and increasing permeability as compared to the natural soil. The results show that the geotechnical properties of the soils at all four study locations have been severely hampered due to contamination induced by open dumping of waste.

关键词： Municipal solid waste (MSW) Physical characterization Soil pollution Open dumping Scanning electron microscopy (SEM) Energy disperse X-ray spectroscopy (EDS)

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Comparative study of travelling-wave and numerical solutions for the coupled short pulse (CSP) equation

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Chinese Physics B 2013年第5期22卷 60-66页

作者： Vikas kumar R. K. gupta Ram Jiwari School of Mathematics and Computer Applications Thapar University

The Lie symmetry analysis is performed for the coupled short plus （CSP） equation. We derive the infinitesimals that admit the classical symmetry group. Five types arise depending on the nature of the Lie symmetry generator. In all types, we find reductions in terms of system of ordinary differential equations, and exact solutions of the CSP equation are derived, which are compared with numerical solutions using the classical fourth-order Runge-Kutta scheme.

关键词： coupled short pulse (CSP) equation Lie symmetric analysis Runge-Kutta scheme exact solutions

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Improved thermoelectric property of cation-substituted CaMnO_3

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Chinese Physics B 2015年第9期24卷 542-547页

作者： Pradeep kumar Subhash C.Kashyap Vijay kumar Sharma H.C.gupta Department of Physics Shyam Lal CollegeUniversity of Delhi Department of Physics Indian Institute of Technology Delhi

Single-phase pristine and cation-substituted calcium manganite（Ca1-xBixMn1-yVyO3-δ） polycrystalline samples were synthesized by the solid state reaction technique. Their thermoelectric properties were measured by a set up that was designed and assembled in the laboratory. The Ca1-x BixMn1-yVyO3-δsample with x = y = 0.04 has shown a power factor（S^2σ） of 176 μW/m/K^2 at 423 K, which is nearly two orders of magnitude higher than that of the pristine sample（2.1 μW/m/K2）. The power factor of the substituted oxide remains almost temperature independent as the Seebeck coefficient increases monotonically with temperature, along with the simultaneous decrease in electrical resistivity which is attributed to enhanced electron density due to co-doping of bismuth and vanadium and grain boundary scattering. These cation-substituted calcium manganites can be used as a potential candidate for an n-type leg in a thermoelectric generator（module）.

关键词： thermoelectric materials solid state reaction Seebeck coefficient power factor

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A Novel Multi-objective Protection Coordination Scheme for a Microgrid with Optimal Deployment of Dual-setting ROCOV Based Relays

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Protection and Control of Modern Power Systems 2024年第4期9卷 23-38页

作者： Praveen kumar gupta Priyanshul Niranjan Niraj kumar Choudhary Nitin Singh Ravindra kumar Singh the Department of Electrical Engineering Motilal Nehru National Institute of Technology AllahabadPrayagraj 211004India

Relay coordination is crucial in electrical power systems to protect against malfunctions and damage caused by unexpected events like short *** address the challenge associated with the reverse direction of fault current,dual-setting(DS)directional over-current relays have evolved but failed to provide proper coordination during changes of load,generation,and *** the meantime,with the increasing number of DS relays,the total relay operating time tends to ***,this paper proposes a protection scheme based on the optimal deployment of conventional and dual-setting rate of change of voltage(DS-ROCOV)relays in distribution *** holds true for varying network topologies and is unaffected by variations in load and *** objective of the proposed scheme is to ensure reliable and efficient protection against faults in distribution systems by minimizing the overall operating time with the optimal number of DS-ROCOV *** proposed protection scheme’s performance is evaluated for different coordination time interval values as well as in different microgrid *** paper outlines the design and implementation of the proposed protection scheme which is validated on the modified IEEE 14-bus system using simulations in Matlab/Simulink.

关键词： Coordination time interval DS-ROCOV relay multi-objective optimization optimal-deployment protection coordination

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Effect of bioflocculants on the coagulation activity of alum for removal of trihalomethane precursors from low turbid water

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Journal of Environmental Sciences 2018年第8期30卷 1-10页

作者： Tanwi Priya Abhrajyoti Tarafdar Bramha gupta Brijesh kumar Mishra Department of Environmental Science and Engineering Indian Institute of Technology (Indian School of Mines)

Reactivity of chlorine towards hydrophobic groups present in natural organic matter（NOM）provokes the formation of carcinogenic disinfection byproducts such as trihalomethanes in chlorinated water. The present study aimed to investigate the variations in coagulant activity of alum using two different bioflocculants（coagulant aid） namely, Moringa oleifera and Cyamopsis tetragonoloba for the removal of hydrophobic fractions of NOM and subsequent chlorine consumption by treated water. Effect of dual coagulants on trihalomethane surrogate parameters such as total organic carbon, dissolved organic carbon, UV absorbing materials and prominent hydrophobic species such as phenolic groups along with aromatic chromophores, polyhydroxy aromatic moiety have also been studied. The concept of differential spectroscopy and absorbance slope index has been employed to understand the combined effects of alum-bioflocculants on the reactivity of NOM with chlorine. Our result shows that the combination of alum and C. tetragonoloba is more efficient for reducing trihalomethane surrogates from chlorinated water as compared to M. oleifera. C. tetragonoloba elicited synchronized effects of sweep coagulation and particle bridging-adsorption which eventually facilitated efficient removal of hydrophobic fractions of NOM. The variation in the mechanistic approach of bioflocculants was due to the presence of cationic charge on M. oleifera and adhesive property of C. tetragonoloba.

关键词： Natural organic matter Bioflocculants Disinfection byproducts Trihalomethanes Differential spectroscopy Absorbance slope index

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Blumgart's technique of pancreaticojejunostomy: Analysis of safety and outcomes

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Hepatobiliary & Pancreatic Diseases International 2019年第2期18卷 181-187页

作者： Vishal gupta Saket kumar Vivek gupta Pradeep Joshi Rahul Rahul Rakesh kumar Yadav Amit Dangi Abhijit Chandra Department of Surgical Gastroenterology King George's Medical University Department of Human Organ Transplant King George's Medical University

Background: Blumgart's pancreaticojejunostomy(PJ) has been described with low pancreatic leak rates. This study aimed to evaluate our experience with this technique regarding the pancreatic leak and other perioperative outcomes. Methods: We performed a single-center retrospective analysis of a cohort of 81 patients who underwent pancreaticoduodenectomy in our department from January 2011 to February 2018. The primary endpoint was the occurrence of a clinically relevant postoperative pancreatic fistula(CR-POPF) and analysis of its risk factors. Results: The CR-POPF rate was 12.3%. Fistula risk score(FRS) was the only significant risk factor for the occurrence of overall POPF in multivariate analysis. However, none of the other factors including FRS was found to be significantly associated with CR-POPF risk. A strong positive correlation was found between the CR-POPF and the incidence of delayed gastric emptying, post-pancreatectomy hemorrhage and increased length of hospital stay. Conclusion: Blumgart's technique is a safe technique of pancreatico-enteric anastomosis with low rates of CR-POPF. CR-POPF with this technique is independent of most of the preoperative and intraoperative factors. Therefore, this technique can be used for all types of the pancreas with consistently good results.

关键词： Pancreaticoduodenectomy Pancreatico-jejunal anastomosis Postoperative pancreatic fistula Pancreatic leak

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Performance Analysis of AODV Routing forWireless Sensor Network in FPGA Hardware

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Computer Systems Science & Engineering 2022年第3期40卷 1073-1084页

作者： Namit gupta Kunwar Singh Vaisla Arpit Jain Adesh kumar Rajeev kumar Department of Computer Science&Engineering Uttarakhand Technical UniversityDehradun248007India Department of Computer Science B T Kumaon Institute of Technology DwarahatIndia Faculty of Engineering&CS Teerthanker Mahaveer UniversityMoradabadIndia Department of Electrical&Electronics Engineering School of EngineeringUniversity of Petroleum and Energy StudiesDehradun248007India

Wireless sensor network(WSN)is a group of interconnected sensor nodes that work wirelessly to capture the information of *** routing of the network is a challenging *** routing of WSN is classified as proactive,reactive,and *** on-demand distance vector(AODV)routing is an example of reactive routing based on the demand route formations among different nodes in the *** research article emphasizes the design and simulation of the AODV routing hardware chip using very-high-speed integrated circuit hardware description language(VHDL)programming in Xilinx integrated synthesis environment(ISE)14.7 *** performance of the chip is studied based on the field-programmable gate array(FPGA)hardware parameters such as slices,lookup table(LUTs),input/output block(IOB),flipflops,and memory for the different configurations of the network(N=10,20….100).The delay and frequency are also estimated on the Virtex-5 *** performance of the WSN with AODV routing is also analyzed based on the packet delivery ratio,throughput,delay,and control *** simulation test cases verified the 8-bit,64-bit,and 128-bit data communication within the nodes.

关键词： Wireless sensor network FPGA synthesis AODVrouting simulation and synthesis VHDL simulation

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Hepatoprotective and antioxidant activity of methanolic extract of flowers of Nerium oleander against CCl_4-induced liver injury in rats

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Asian Pacific Journal of Tropical Medicine 2012年第9期5卷 677-685页

作者： kumar Gaurav Singhal Ghanshyam Das gupta Pharmacology & Toxicology Research Lab Department of PharmacologyASBASJSM College of PharmacyBelaRopar-140111PunjabIndia ASBASJSM College of Pharmacy BelaRopar-140111PunjabIndia

Objective:To investigate the antioxidant and hepatoproteetive activity of methanolic flower extract of Nerium oleander against CCl4—induced hepatotoxicity in ***:In vitro antioxidant activity of methanolic extract of dowers of Nerium oleander（MENO-F） was evaluated by various assays,including reducing power,lipid ***,superoxide anion,hydroxyl radicals and metal *** hepatoproteetive and in vivo antioxidant activity of MENO-F were evaluated against CCl4-induced hepatic damage in *** MENO-F at dose of 100.200 and 400 mg/kg were administered orally once daily for seven *** enzymatic levels of serum glutamate oxaloacetate transaminase（AST）,serum glutamate pyruvate transaminase（ALT）,serum alkaline phosphatase（ALP） and total bilirubin were estimated along with estimation of superoxide dismutase（SOD） and malondialdehvde（MDA） levels in liver *** histopathological examination of the liver sections was carried out to support the induction of hepalotoxicity and hepatoproteetive ***:The extract showed potent activities on reducing power,lipid *** anion,hydroxyl radical and metal *** substantially elevated serum enzymatic levels of AST,*** and total bilirubin were found to he restored towards normalization significantly by the MENO-F in a dose dependent manner with maximum hepatoprotection at 400 mg/kg dose *** histopathological observations supported the biochemical evidences of *** level of SOD and decreased level of MDA further strengthen the hepatoproteetive observations. The results of the present study strongly reveal that MENO-F has potent antioxidant activity and hepatoproteetive activity against CCl4—induced hepatic damage in experimental animals.

关键词： Hepatoprotective Antioxidant Carbon tetrachloride Nerium oleander Silymarin

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Promising Antiviral Molecules from Ayurvedic Herbs and Spices against COVID-19

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Chinese Journal of Integrative Medicine 2021年第4期27卷 243-244页

作者： Mariappan Rajan Prashant gupta Awanish kumar University Madurai-625021(TN)India Department of Balroga Shri NPA Govt.Ayurveda CollegeRaipur-492010(CG)India Department of Biotechnology National Institute of TechnologyRaipur-492010(CG)India

COVID-19 is caused by the novel coronavirus severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)and smashed our society *** efforts/measures have been taken worldwide to control coronavirus disease 2019(COVID-19)but it is spreading ceaselessly across the ***,Chinese medicine was used to treat COVID-19 and they found better recovery *** has also drawn the attention of the scientific community to Ayurveda where traditional knowledge of this domain can be explored for finding COVID-19 a cure or prevention.

关键词： acute respiratory COV

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