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Optimal Bidding Strategies of Microgrid with Demand Side Management for Economic Emission Dispatch incorporating Uncertainty and Outage of Renewable Energy Sources

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Energy Engineering 2024年第4期121卷 849-867页

作者： Mousumi Basu Chitralekha jena Baseem Khan Ahmed Ali Department of power Engineering Jadavpur UniversityJadavpurIndia School of Electrical Engineering KIIT UniversityBhubaneswarIndia Department of Electrical and Computer Engineering Hawassa UniversityHawassaEthiopia Department of Electrical and Electronic Engineering Technology Faculty of Engineering and the Built EnvironmentUniversity of JohannesburgJohannesburgSouth Africa

in the restructured electricity market,microgrid(MG),with the incorporation of smart grid technologies,distributed energy resources(DERs),a pumped-storage-hydraulic(pSH)unit,and a demand response program(DRp),is a smarter and more reliable electricity *** consists of gas turbines and renewable energy sources such as photovoltaic systems and wind *** bidding strategies,prepared by MG operators,decrease the electricity cost and emissions from upstream grid and conventional and renewable energy sources(RES).But it is inefficient due to the very high sporadic characteristics of RES and the very high outage *** solve these issues,this study suggests non-dominated sorting genetic algorithm Ⅱ(NSGA-Ⅱ)for an optimal bidding strategy considering pumped hydroelectric energy storage and DRp based on outage conditions and uncertainties of renewable energy *** uncertainty related to solar and wind units is modeled using lognormal and Weibull probability ***-based DRp is used,especially considering the time of outages along with the time of peak loads and prices,to enhance the reliability of MG and reduce costs and emissions.

关键词： Micro-grid distributed energy resources demand response program uncertainty outage

is primary transcatheter aortic valve implantation the new normal?

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Journal of Geriatric Cardiology 2024年第4期21卷 458-461页

作者： R.Anantharaman C.Sundar Kamal Kant jena K.Arun Department of Cardiology Kauvery HospitalChennaiIndia

Degenerative calcific aortic valve stenosis(AS)is the most common valvular heart disease in elderly.^[1] it is well documented that symptomatic severe AS follows a malignant course leading to cardiogenic shock(CS).

关键词： aortic stenosis implantation

Analysis of the urethral stricture score and patient-related factors as predictors of outcomes following oral mucosal graft urethroplasty

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Asian Journal of Urology 2024年第3期11卷 473-479页

作者： Nikita Shrivastava Rahul jena Deepak prakash Bhirud Mahendra Singh Gautam Ram Choudhary Arjun Singh Sandhu Department of Urology All India Institute of Medical SciencesJodhpurRajasthanIndia

Objective:The complexity of urethral strictures can predict outcomes following *** previously described urethral stricture score(U score)considered only stricture-related factors to grade the complexity of urethral strictures and to predict recurrence post urethroplasty,but not considered patient-related factors for the *** aimed to study the correlation of both of these factors to the outcomes of oral mucosal graft ***:We retrospectively reviewed data of 101 patients who underwent oral mucosal graft urethroplasty in our institute with a minimum follow-up of 6 *** patient characteristics and stricture-related parameters were *** U score was calculated for all patients which consisted of the length,location,number,and etiology of *** and multivariate Cox proportional hazard regression models were used to determine significant risk factors of ***:The mean follow-up of patients was 15 *** was seen in 28 patients and the mean time for detection of recurrence was 8 months of *** Charlson Comorbidity index,history of previous intervention,length of strictures,location of strictures,number of strictures,history of smoking,and etiology were independent predictors of recurrence following *** on these parameters,we formulated the modified U score(MU score).The scores ranged from 0 to 6 and a score of>2 was found to be predictive of *** comparing receiver operating characteristic curves for both scores by the DeLong test,the MU score had larger area under the curve than the U ***:The MU scoring system is the first of its kind attempt taking into consideration both patient-and stricture-related factors to predict recurrence following oral mucosal graft urethroplasty.

关键词： Urethral stricture Urethral stricture score Recurrence Urethroplasty

Hindi translation and validation of the English version of the gastrointestinal symptom rating scale questionnaire:An observational study

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World Journal of Gastrointestinal pharmacology and Therapeutics 2024年第5期15卷 33-39页

作者： Neha Jindal Anuraag jena Krishan Kumar Bijaya K padhi Rajni Sharma Vaneet Jearth Usha Dutta Vishal Sharma Department of Gastroenterology Postgraduate Institute of Medical Education and Research(PGIMER)Chandigarh 160012India Department of psychiatry Postgraduate Institute of Medical Education and Research(PGIMER)Chandigarh 160012India Department of Community Medicine and School of public Health Postgraduate Institute of Medical Education and Research(PGIMER)Chandigarh 160012India Advanced pediatric Centre Postgraduate Institute of Medical Education and Research(PGIMER)Chandigarh 160012India

BACKGROUND The gastrointestinal symptom rating scale(GSRS)is a questionnaire in English language which is designed to assess the clinical symptoms in patients with irritable bowel syndrome(iBS)and peptic ulcer *** validated scale has questions on around 15 items and has been validated in patients with dyspepsia and *** To translate and validate the English version of the GSRS questionnaire to the Hindi *** The purpose of the present work was to create a Hindi version of this questionnaire for use in the indian *** process involved various steps as per the World Health Organization methodology including initial forward translation,backward translation,and assessment by an expert *** pilot testing was followed by testing in healthy and diseased *** The Hindi translation was pilot tested in 20 individuals and further validated in healthy controls(n=30,15 females)and diseased individuals(n=72,27 females).The diseased group included patients with functional dyspepsia and ***'s alpha for internal consistency on the final translated GSRS questionnaire was 0.715 which is considered *** questions significantly differentiated the diseased population from the healthy population(p valuein the translated Hindi version of the *** The translated Hindi GSRS can be used to evaluate gastrointestinal function in clinical trials and community surveys in Hindi speaking populations.

关键词： irritable bowel syndrome Gut health Dyspepsia Symptoms pain Constipation Diarrhoea

Satellite remote sensing of the island mass effect on the Sub-Antarctic Kerguelen plateau, Southern Ocean

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Frontiers of Earth Science 2016年第3期10卷 479-486页

作者： Babula jena ESSO-National Centre for Antarctic and Ocean Research Ministry of Earth Sciences (MoES) Headland Sada Goa 403804 India

The presence of the Kerguelen plateau and surrounding bathymetric features has a strong influence on the persistently eastward flowing Antarctic Circumpolar Current （ACC）, resulting in enhancement of surface chlorophyll-a （Chl-α） in the downstream section of the plateau along the polar front （pF）. The phenomenon is reported in this paper as the island mass effect （iME）. Analysis of climatological Chl-a datasets from Aqua- Moderate Resolution imaging Spectroradiometer （Aqua- MODiS） and Sea-viewing Wide Field-of-view Sensor （SeaWiFS） shows distinct bloomy plumes （Chl-α 〉 0.5 mg/m3） during austral spring-summer spreading as far as -1800 km offshore up to 98°E along the downstream of the north Kerguelen plateau （NKp）. Similar iME phenomena is apparent over the south Kerguelen plateau （SKp） with the phytoplankton bloom extending up to 96.7°E, along the southern boundary of ACC. The iME phenomena are pronounced only during austral spring-summer period with the availability of light and sedimentary source of iron from shallow plateau to sea surface that fertilizes the mixed layer. The NKp bloom peaks with a maximum areal extent of 1.315 million km2 during December, and the SKp bloom peaks during January with a time lag of one month. The blooms exist for at least 4 months of a year and are significant both as the base of regional food web and for regulating the biogeochemical cycle in the Southern Ocean. Even though the surface water above the Kerguelen plateau is rich in Chl-a, an exception of an oligotrophic condition dominated between NKp and SKp due to apparent intrusion of iron limited low phytoplankton regime waters from the Enderby basin through the north- eastward Fawn Trough Current.

关键词： island mass effect Antarctic CircumpolarCurrent Aqua-MODiS SeaWiFS

ANN modeling for diffusivity of mushroom and vegetables using a fluidized bed dryer

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particuology 2013年第5期11卷 607-613页

作者： Subasini jena Abanti Sahoo Chemical Engineering Department National Institute of TechnologyRourkela 769008OrissaIndia

Drying characteristics in terms of diffusivity were studied for mushrooms and different vegetables in a fluidized bed dryer. Drying characteristics with falling rate regime were computed for all the sampi^z. Effective diffusivity of each sample was calculated. Mass transfer coefficients were determined. Mass transfer kinetics for drying of different samples was also found out. Correlations for the diffusivity of samples were developed by relating the experimentally observed data with the different system parame- ters on the basis of regression analysis. The developed correlations for effective moisture diffusivity of the samples are validated by artificial neural network （ANN） modeling. Finally calculated values of diffusivity obtained through both the methods are compared with the experimentally measured values which show a very good approximation thereby indicating the wide applicability of the developed correlations for industrial uses.

关键词： Activation energyEffective diffusivityDrying rateMass transfer kineticsRegression analysisArtificial neural network

A numerical study of violent sloshing problems with modified MpS method

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Journal of Hydrodynamics 2017年第4期29卷 659-667页

作者： Debadatta jena Kishore Chandra Biswal Department of Civil Engineering National Institute of Technology

A numerical study on violent liquid sloshing phenomenon in a partially filled rectangular container is carried out by using moving particle semi-implicit（MpS） method. The present study deals with the implementation of five modifications all together over the original MpS method. The modifications include improved source terms for pressure poisson equation, special approximation technique for the representation of gradient differential operator, collective action of mixed free surface particle identification boundary conditions, effecting Neumann boundary condition on solving the ppE and fixing judiciously the parting distance among particles to prevent collision. The suitability of the kernel function used in the original MpS method along with these five modifications is investigated for violent sloshing problems. The present model ensures a good agreement between numerical results with the existing experimental observations. The model is successfully applied to a partially filled tank undergoing horizontal sinusoidal excitation to compute the sloshing wave amplitudes and pressure on tank walls. The assessment of dynamic behaviour manifested in terms of base shear, overturning moment and impact pressure load exerted on tank ceiling induced by violent sloshing motion using MpS method is not reported in the open literature and has been efficiently carried out in the present study.

关键词： Sloshing particle method impact pressure base shear overturning moment

Backstepping sliding mode control of a variable speed wind turbine for power optimization

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Journal of Modern power Systems and Clean Energy 2015年第3期3卷 402-410页

作者： Saravanakumar RAJENDRAN Debashisha jena National institute of Technology Karnataka SurathkalIndia

To optimize the energy capture from the wind,wind turbine(WT)should operate at variable *** on the wind speed,the operating regions of the WT are divided into two parts:below and above the rated wind *** main aim at below rated wind speed is to maximize the energy capture from the wind with reduced oscillation on the drive *** above rated wind speed,the aim is to maintain the rated power by using pitch *** paper presents the control of WT at below rated wind speed by using backstepping sliding mode control(BSMC).in BSMC,generator torque is considered as the control input that depends on the optimal rotor ***,this optimal rotor speed is derived from effective wind *** this paper,effective wind speed is estimated from aerodynamic torque and rotor speed by using the modified Newton Rapshon(MNR)***,a conventional sliding mode controller(SMC)is applied to the WT,but the performance of the controller was found to be less robust with respect to ***,WT external disturbance is not *** overcome the above drawback,BSMC is proposed and both the controllers are tested with mathematical model and finally validated with the fatigue,aerodynamics,structures,and turbulence(FAST)WT simulator in the presence of *** the results,it is concluded that the proposed BSMC is more robust than conventional SMC in the presence of disturbances.

关键词： Nonlinear control Single mass model Modified Newton Raphson(MNR) Backstepping sliding mode control(BSMC)

Variable speed wind turbine for maximum power capture using adaptive fuzzy integral sliding mode control

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Journal of Modern power Systems and Clean Energy 2014年第2期2卷 114-125页

作者： Saravanakumar RAJENDRAN Debashisha jena National institute of Technology Karnataka SurathkalIndia

This paper presents a nonlinear control approach to variable speed wind turbine(VSWT)with a wind speed *** dynamics of the wind turbine(WT)is derived from single mass *** this work,a modified Newton Raphson estimator has been considered for exact estimation of effective wind *** main objective of this work is to extract maximum energy from the wind at below rated wind speed while reducing drive train *** order to achieve the above objectives,VSWT should operate close to the optimal power *** generator torque is considered as the control input to achieve maximum energy *** the literature,it is clear that existing linear and nonlinear control techniques suffer from poor tracking of WT dynamics,increased power loss and complex control *** addition,they are not robust with respect to input *** order to overcome the above drawbacks,adaptive fuzzy integral sliding mode control(AFiSMC)is proposed for VSWT *** proposed controller is tested with different types of disturbances and compared with other nonlinear controllers such as sliding mode control and integral sliding mode *** result shows the better performance of AFiSMC and its robustness to input *** this paper,the discontinuity in integral sliding mode controller is smoothed by using hyperbolic tangent function,and the sliding gain is adapted using a fuzzy technique which makes the controller more robust.

关键词： Variable speed wind turbine integral sliding mode controller(iSMC) Sliding mode control(SMC) Adaptive fuzzy integral sliding mode control(AFiSMC)