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Load frequency control in deregulated power system with wind integrated system using fuzzy controller

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Frontiers in Energy 2013年第2期7卷 245-254页

作者： yajvender pal verma Ashwani KUMAR Department of Electrical & Electronics Engineering UIET PanjabUniversity Chandigarh 160014 India Department of Electrical Engineering National Institute of TechnologyKurukshetra Haryana 132119 India

This paper presents the analysis of load frequency control （LFC） of a deregulated two-area hydro-thermal power system using fuzzy logic controller, with doubly fed induction generators （DFIGs） integrated into both the control areas. The deregulation of power sector has led to the formation of new companies for generation, transmission and distribution of power. The conventional two-area power system is modified to study the effects of the bilateral contracts of companies on the system dynamics. Deregulation creates highly competitive and distributed control environment, and the LFC becomes even more challenging when wind generators are also integrated into the system. The overall inertia of the system reduces, as the wind unit does not provide inertia and isolates from the grid during disturbances. The DFIGs integrated provide inertial support to the system through modified inertial control scheme, and arrests the initial fall in frequency after disturbance. The inertial control responds to frequency deviations, which takes out the kinetic energy of the wind turbine for improving the frequency response of the system. To enhance the participation of the doubly fed induction generator （DFIG） in the frequency control, optimal values of the speed control parameters of the DFIG-based wind turbine have been obtained using integral square error （ISE） technique. The dynamics of the system have been obtained for a small load perturbation, and for contract violation using fuzzy controller.

关键词： frequency regulation fuzzy controller deregulated power system doubly fed induction generator(DFIG) bilateral contract

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

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Frontiers in Energy 2012年第2期6卷 184-192页

作者： yajvender pal verma Ashwani KUMAR Department of Electrical&Electronics Engineering UIETPanjab UniversityChandigarh 160014India Department of Electrical Engineering National Institute of TechnologyKurukshetraHaryana 132119India

Frequency regulation in a generation mix having large wind power penetration is a critical issue, as wind units isolate from the grid during disturbances with advanced power electronics controllers and reduce equivalent system inertia. Thus, it is important that wind turbines also contribute to system frequency control. This paper examines the dynamic contribution of doubly fed induction generator （DFIG）-based wind turbine in system frequency regulation. The modified inertial support scheme is proposed which helps the DFIG to provide the short term transient active power support to the grid during transients and arrests the fall in frequency. The frequency deviation is considered by the controller to provide the inertial control. An additional reference power output is used which helps the DFIG to release kinetic energy stored in rotating masses of the turbine. The optimal speed control parameters have been used for the DFIG to increases its participation in frequency control. The simulations carried out in a two-area interconnected power system demonstrate the contribution of the DFIG in load frequency control.

关键词： doubly fed induction generator (DFIG) load frequency control inertial control wind energy conversion system (WECS)

Searching systematics for nonfactorizable contributions to B^(-)and B^(0) hadronic decays

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Chinese Physics C 2022年第7期46卷 47-55页

作者： Maninder Kaur Supreet pal Singh R.C.verma Department of Physics Punjabi UniversityPatiala-147002India

The two-body weak decays B→πD/B→ρD and B→πD are examined using isospin analysis to study nonfactorizable *** determining strong interaction phases and obtaining factorizable contributions from spectator-quark diagrams for Nc=3,we determine nonfactorizable isospin amplitudes from the experimental data for these *** results support the universality of the ratio of nonfactorizable isospin reduced amplitudes for these decays within experimental *** demonstrate that these systematics are not coincidental,we also plot our results *** ratio.

关键词： nonfactorization weak hadronic decays HEP-PHE

Searching systematics for nonfactorizable contributions to B- and■ hadronic decays

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Chinese Physics C 2022年第7期 49-57页

作者： Maninder Kaur Supreet pal Singh R.C.verma Department of Physics Punjabi University

The two-body weak decays ■and■ are examined using isospin analysis to study nonfactorizable contributions. After determining strong interaction phases and obtaining factorizable contributions from spectator-quark diagrams for Nc=3, we determine nonfactorizable isospin amplitudes from the experimental data for these modes. Our results support the universality of the ratio of nonfactorizable isospin reduced amplitudes for these decays within experimental errors. To demonstrate that these systematics are not coincidental, we also plot our results w. r. t. this ratio.

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Compatible package-based agriculture systems:an urgent need for agro-ecological balance and climate change adaptation

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Soil Ecology Letters 2022年第3期4卷 187-212页

作者： Rishikesh Singh Tanu Kumari Pramit verma Bhupinder pal Singh Akhilesh Singh Raghubanshi Integrative Ecology Laboratory(IEL) Institute of Environment&Sustainable Development(IESD)Banaras Hindu UniversityVaranasi 221005India NSW Department of Primary Industries Elizabeth Macarthur Agricultural InstituteMenangleNSW 2568Australia

Besides contributing majorly in the growth of a country,agriculture is one of the severely affected sectors at *** modifications and adaptations are being made in agricultural practices to cope-up with the declining soil fertility and changing climate scenarios across the ***,the development and adoption of a single agricultural practice may not help in the holistic mitigation of the impacts of climate change and may result in economic vulnerability to ***,it is high time to develop and recommend a group of agricultural practices i.e.,package-based agriculture system having some compatibility for one another in the long *** this article,a viewpoint has been given on some emergent agronomic practices adopted in the tropical agroecosystems which have potential to be developed as compatible agricultural package in ***,we also emphasized on exploring some key indicators/environmental factors to assess the compatibility of different agronomic *** identifying the research transition from single to combined agricultural practices,a bibliometric analysis was performed by using conservation agriculture(CA),the system of rice intensification(SRI),organic agriculture and soil(biochar)amendment as the major agronomic practices being used for improving agroecological services such as improving nutrient cycling,soil fertility and crop productivity as well as climate change *** results revealed that scientific communities are now paying attention to exploring the role of combined agricultural practices for agro-ecological balance and climate change ***,the limitations of the adoption of agronomic packages under different agro-climatic zones have also been *** recommendations of the study would further help the environmental decision-makers to develop potential measures for climate change mitigation without compromising the agro-ecological balance.

关键词： Agricultural policies Bibliometric analysis Biochar Conservation agriculture GHG emission Organic farming SRI Sustainable agriculture

Figure of Merit Enhancement of Surface Plasmon Resonance Biosensor Using Ga-Doped Zinc Oxide in Near Infrared Range

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Photonic Sensors 2020年第4期10卷 340-352页

作者： Sarika pal Alka verma Y.K.PRAJAPATI J.P.SAINI Department of ECE National Institute of Technology UttarakhandSrinagarGarhwal 246174India Department of ECE Institute of Engineering and Rural TechnologyAllahabadPrayagrajUttar Pradesh 211002India Department of ECE Motilal Nehru National Institute of Technology AllahabadPrayagrajUttar Pradesh 211004India Department of ECE Netaji Subhas University of Technology(NSUT)New Delhi 110078India

This work presents a surface plasmon resonance biosensor for the figure of merit enhancement by using Ga-doped zinc oxide(GZO),i.e.,nanostructured transparent conducting oxide as plasmonic material in place of metal at the telecommunication ***-dimentional graphene is used here as a biorecognition element(BRE)layer for stable and robust adsorption of *** is possible due to stronger van der Waals forces between graphene’s hexagonal cells and carbon-like ring arrangement present in *** proposed sensor shows improved biosensing due to fascinating electronic,optical,physical,and chemical properties of *** work analyses the sensitivity,detection accuracy,and figure of merit for the GZO/graphene SPR sensor on using the dielectric layer in between the prism and *** highest figure of merit of 366.7 RIU^(−1) is achieved for the proposed SPR biosensor on using the nanostructured GZO at the 3000 nm dielectric *** proposed SPR biosensor can be used practically for sensing of larger size biomolecules with due availability of advanced techniques for the fabrication of the nanostructured GZO and graphene.

关键词： SPR transparent conducting oxide Ga-doped zinc oxide sensitivity(S) detection accuracy figure of merit

HPTLC-MS as a Neoteric Hyphenated Technique for Separation and Forensic Identification of Drugs

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Journal of Analytical Sciences, Methods and Instrumentation 2018年第1期8卷 1-15页

作者： Kanak Lata verma Manoj Kumar Amar pal Singh Regional Forensic Science Laboratory Government of NCT of Delhi New Delhi India Forensic Science Post Graduate Course Department of Anthropology University of Delhi New Delhi India

Drugs are traditionally been identified on basis of chromatographic-spectroscopic hyphenated techniques in instrumental analysis. Gas chromatography (GC) and Liquid chromatography (LC) hyphenated with mass spectroscopy (MS) i.e. GC-MS and LC-MS give reliable and confirmatory results in drugs identification. In the present work the novel hyphenated technique High Performance Thin Layer Chromatography-Mass Spectroscopy (HPTLC-MS) has been used. This technique provides efficient, quick and simple method for identification and separation of Narcotic drugs and psychotropic substances. The drugs under study are Papaverine, Methadone, Cocaine, Ketamine, Caffeine, Codeine, Diazepam, Thebaine, Heroin, Methamphetamine, Carbamazepine, Morphine, Narcotine and Ephedrine. The present study comprising of sixteen drugs has been carried out on CAMAG HPTLC instrument with automatic sampling. Thin layer chromatography (TLC) plates were developed in various solvent systems, scanned under TLC scanner and the results in terms of Retention Factor (Rf value) and UV spectrum (λmax) are presented in the manuscript. Using hyphenated technique of HPTLC-MS (MS 2020 SHIMADZU) spots of these drugs from TLC plate was lifted with CAMAG TLC-MS interface and confirmed by the mass spectrum of the individual drugs by their m/z values thus delivering fast and accurate confirmatory result on the TLC plate.

关键词： Narcotic Drugs Psychotropic Substances HPTLC-MS Chromatography Mass Spectroscopy Hyphenated Techniques Forensic Science

ARABIDOPSIS LST8 proteins interact with target of rapamycin and over-expression of LST8 results in plants being hypersensitive to light

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ARABIDOPSIS LST8 proteins interact with target of rapamycin ...

<i>In Pursuit</i>of Porcine Pluripotent Stem Cells for Autologous Cell Therapy

从植物科学到农业发展——2012全国植物生物学大会

作者： Jayanta Chatterjee Desh pal S verma Department of Molecular Genetics and Plant Biotechnology Center The Ohio State University

LST8(GpL) negatively regulates amino acid biosynthesis as a component of the TOR pathway in *** are two homologs of LST8 in Arabidopsis,AtLST8.1(At2g22040) and AtLST8.2(At3gl8140).Here we demonstrate that both AtLST8.1 and AtLST8.2 interact with TOR ***8.2 complements the function of yeast LST8,while AtLST8.1 does ***8.1 and AtLST8.2 have differential expression levels in plant ***8.1 only transcribed and expressed in *** expression of AtLST8.1 in wild type Arabidopsis down regulates the expression of AtLST8.2 and represses the primary bolting with increased ***8.2 is an essential gene for plant development as three T-DNA insertion mutants showed that disruption of AtLST8.2 leads to embryo *** expression of AtLST8.2 in wild type plants down regulates its own expression,and increases the expression of AtLST8.1,resulting in the plants that are hypersensitive to light *** strong light halts the growth of AtLST8.2-transgenic *** of GFP with AtLST8.2 and its expression revealed that AtLST8.2 is present in *** PGK1,a glycolytic enzyme which is also expressed in chloroplast,reverses the response to AtLST8.2 expression *** data suggest that AtLST8 proteins play an important role in photosynthesis and possibly amino acid metabolism in plants.

关键词： LST8 proteins TOR hypersensitive light photosynthesis

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Stem Cell Discovery 2014年第4期4卷 107-124页

作者： Vinod verma Ashish Mehta Sanjay pal Manoj Kumar Birbal Singh Ashok Kumar Sanjeev Gautam Centre of Biotechnology Nehru Science Complex University of Allahabad Allahabad India National Heart Research Institute Singapore National Heart Centre Singapore Department of Microbiology & Immunology National Institute of Nutrition Hyderabad India Indian Veterinary Research Institute Regional Station Palampur India Department of Zoology MLK Post Graduate College Balrampur India Department of Biotechnology Kurukshetra University Kurukshetra India

Treatments to repair the human heart following regenerative diseases remain a challenge for medical science. Unlike lower vertebrate species the human heart lacks a regenerative pathway meaning that research has to be focused on cell transplantation. Porcines (Sus scrofa) are excellent models for cardiovascular disease and pluripotent stem cells (PSCs) generated from porcines will provide important clinical insights for cardiac cell therapy. This could open a new avenue of research into degenerative conditions as porcine is a more effective human proxy to work with. However, bona fide PSCs are currently available onlyin rodents (mouse, rat) and primates (monkey, human). Attempts to derivepluripotent stem cells (PSCs) from porcine have been going on for more than two decades with slow progress. Despite the fact that the porcine stem cells are under increasing glare of publicity due to milestone achievements in this area of research. Advances in stem cell technology, especially the genetic engineering, innovative cell culturing and induced pluripotency to generate stem cells has dramatically revolutionized the basic and applied investigations and applications of porcine stem cells. This review attempts to summarize the major signaling pathways involved in maintenance of pluripotency and the state of the art conceptual and technical progress for generating bona fide porcine PSCs.

关键词： Porcine Model Signaling Pathways Stem Cells Induced Pluripotent Stem Cells Pluripotency Regenerative Medicine Cell Therapy Epigenetics