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Journal articles on the topic 'DFID model'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Bharat, Yadav, and Sharma Arpita. "Livelihood Analysis of Ornamental Fish Producers in Mumbai and Thane Districts of Maharashtra State." Asian Journal of Agricultural Extension, Economics & Sociology 17, no. 4 (2017): 1–9. https://doi.org/10.9734/AJAEES/2017/33965.

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The present study was conducted to assess the livelihood status of ornamental fish producers in the Mumbai and Thane districts of Maharashtra. A total of 30 ornamental fish producers were taken as the sample out of 90 for present study of which 22 are men and 08 are women. The semi-structured interview schedule was prepared as per the livelihood profile of the Department for International Development (DFID) framework. The socio-economic status indicates that the majorities of the producers were literate, middle-age group and had more than 05 years of experience. The sustainable livelihood fram

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Cabezón, F. A., A. P. Schinckel, Y. L. León, and B. A. Craig. "Analysis of lactation feed intakes for sows with extended lactation lengths." Translational Animal Science 1, no. 1 (2017): 1–25. http://dx.doi.org/10.2527/tas2017-0016.

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Abstract The objectives of this research were to quantify and model daily feed intakes to 28 d of lactation in modern sows. A total of 4,512 daily feed intake (DFI) records were collected for 156 Hypor sows from February 2015 to March 2016. The mean lactation length was 27.9 ± 2.0 d. The data included 9 parity 1, 33 parity 2 and 114 parity 3+ sows. Data were collected using a computerized feeding system (Gestal Solo, JYGA Technologies, Quebec, Canada). The feeding system was used to set an upper limit to DFI for the first 7 d of lactation. Overall, the least-squares means of a model including

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Gu, Likun, Guoqing Shi, Yuanke Zhao, Huicong Liu, and Xinyu Ye. "How Are Residents’ Livelihoods Affected by National Parks? A SEM Model Based on DFID Framework." Land 14, no. 7 (2025): 1501. https://doi.org/10.3390/land14071501.

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National parks represent a global initiative for biodiversity conservation and environmentally sustainable societal development, with China having launched its own national park program. The establishment and operation of these parks significantly impact local residents’ livelihoods. Based on DFID’s Sustainable Livelihoods Framework, an assessment tool introduced by the UK Department for International Development (DFID) for evaluating the livelihood standards of residents, this study constructs a structural equation modeling (SEM) framework to analyze how national parks affect residents’ livel

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Rabbanee, Fazlul Kabir, Sanoara Yasmin, and Ahasanul Haque. "WOMEN INVOLVEMENT IN DRY FISH VALUE CHAIN APPROACHES TOWARDS SUSTAINABLE LIVELIHOOD." Australian Journal of Business and Management Research 01, no. 12 (2012): 52–58. http://dx.doi.org/10.52283/nswrca.ajbmr.20120112a05.

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Coastal fisherwomen of Bangladesh are marginalized yet they play a significant role in different levels of dry fish marketing chain. This study covers seven different villages of Cox’s bazaar districts. A total of 280 women fishers among - 140 fisherwomen and 140 women workers, were selected for the study. The paper applies different aspects of DFID Sustainable livelihood model in the study areas to learn the livelihood pattern of sample respondents and explores to what extent the respondents have access to these basic livelihood assets like physical, natural, financial, social and human capit

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Sun, Tiange, and Jing Zhou. "Impact of Livelihood Capital on the Adoption Behaviour of Integrated Agricultural Services among Farmers." Sustainability 15, no. 24 (2023): 16895. http://dx.doi.org/10.3390/su152416895.

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Based on the sustainable livelihoods framework (DFID) and the theory of farmer behaviour, this study uses data points from 505 field-based household surveys conducted by the group in Liaoning Province in 2021–2022 to investigate the impact of livelihood capital on farmers’ adoption of integrated agricultural services (IASs). Using the entropy method and the intermediary effect model, this paper tests the mediating effect of value perceptions on the path of influence. The findings of this study show that the adoption rate of IASs is low and that farmers lack sufficient knowledge of these servic

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Wang, Wei, Chongmei Zhang, Yan Guo, and Dingde Xu. "Impact of Environmental and Health Risks on Rural Households’ Sustainable Livelihoods: Evidence from China." International Journal of Environmental Research and Public Health 18, no. 20 (2021): 10955. http://dx.doi.org/10.3390/ijerph182010955.

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China has entered a “post-poverty alleviation” era, where the achievement of sustainable livelihoods by farmers has become a focus. This study used the China Family Panel Studies (CFPS) database, which was constructed based on an analysis of the DFID sustainable livelihood framework, and built a sustainable livelihood index system for farmers using the entropy weight method to measure the weights of sustainable livelihood indexes and calculate a sustainable livelihood index. This study used the Tobit model to discuss the impacts of different types of risk on the achievement of a sustainable li

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Sun, Fei, Katrin Seeher, Stéfanie Fréel, and Tarun Dua. "The Process of Developing a WHO Dementia-Friendly Community Global Toolkit: Input From Multiple Stakeholders." Innovation in Aging 4, Supplement_1 (2020): 698. http://dx.doi.org/10.1093/geroni/igaa057.2449.

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Abstract This study examined the process that the Department of Mental Health and Substance Abuse of WHO used to develop a global toolkit for dementia friendly initiatives (DFI). Data were collected through a mix-method approach consisting of individual interviews of 20 DFI leaders, four focus group interviews of persons living with dementia (PWD), three group interviews of professionals, and an online survey of 129 participants from 46 countries. Data from multiple sources were examined. The meaning of DFIs centered on the needs of PWD, multi-sector collaboration, and physical and social envi

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Wang, Chao, and Jiayi Tang. "Ritualized Law and Livelihood Fragility of Left-Behind Women in Rural China." International Journal of Environmental Research and Public Health 17, no. 12 (2020): 4323. http://dx.doi.org/10.3390/ijerph17124323.

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Family separation in rural China has led to a considerably large number of left-behind women who have to deal with livelihood fragility. The Department for International Development (DFID) framework focusing on households provides a base to understand the livelihood fragility of these women. Based on this framework and the existing field research, this study identifies that the national macro-strategy of unsynchronized development of industrialization, informatization, urbanization, and agricultural modernization leads to a separated migration model for rural families. Furthermore, the process

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Ao, Yibin, Ling Tan, Qiqi Feng, et al. "Livelihood Capital Effects on Famers’ Strategy Choices in Flood-Prone Areas—A Study in Rural China." International Journal of Environmental Research and Public Health 19, no. 12 (2022): 7535. http://dx.doi.org/10.3390/ijerph19127535.

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The global climate change has resulted in huge flood damages, which seriously hinders the sustainable development of rural economy and society and causes famers’ livelihood problems. In flood-prone areas, it is imperative to actively study short and long-term strategies and solve farmers’ livelihood problems accordingly. Following the sustainable development analysis framework proposed by the Department for International Development (DFID), this study collects empirical data of 360 rural households in six sample villages in the Jialing River Basin of Sichuan Province, China through a village-t

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Husain, Iqbal. "Socio-Cultural Transformation of a Village Community in the 21st Century: A Case of Bangladesh." South Asian Journal of Social Studies and Economics 22, no. 3 (2025): 35–49. https://doi.org/10.9734/sajsse/2025/v22i3967.

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For a very long period, both the Indian subcontinent and Bangladesh's rural societies remained unchanging and stagnant. However, these societies have undergone significant transformation since the mid-20th century. Since the 1990s, this process of change has quickened. The media, internet, education, electrification, technology, and other factors have accelerated the changes in rural communities. Ownership of land, patterns of agriculture, enrollment in school, social mobility, sources of entertainment, use of contraceptives, lifestyle, etc. have been transformed over the previous 20 years. To

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Kha, Quang-Hien, Viet-Huan Le, Truong Nguyen Khanh Hung, Ngan Thi Kim Nguyen, and Nguyen Quoc Khanh Le. "Development and Validation of an Explainable Machine Learning-Based Prediction Model for Drug–Food Interactions from Chemical Structures." Sensors 23, no. 8 (2023): 3962. http://dx.doi.org/10.3390/s23083962.

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Possible drug–food constituent interactions (DFIs) could change the intended efficiency of particular therapeutics in medical practice. The increasing number of multiple-drug prescriptions leads to the rise of drug–drug interactions (DDIs) and DFIs. These adverse interactions lead to other implications, e.g., the decline in medicament’s effect, the withdrawals of various medications, and harmful impacts on the patients’ health. However, the importance of DFIs remains underestimated, as the number of studies on these topics is constrained. Recently, scientists have applied artificial intelligen

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Bakibinga-Gaswaga, Elizabeth. "Something Old, Something New – Which Way to Go for Rule of Law Projects in the Agenda 2030 Era?" Law and Development Review 12, no. 2 (2019): 595–625. http://dx.doi.org/10.1515/ldr-2019-0023.

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Abstract Africa and the developing world have been the theatre of countless rules of law assistance projects since the end of World War II, with mixed results. While the reasons for the mixed results vary from project to project and from country to country, this paper seeks to address the limitations that arise right from project inception, reviews the cycle of project management from problem construction to monitoring and evaluation, taking into account the core and secondary aspects of project management such as scope, budget, quality, schedule, as well as stakeholder engagement, communicati

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Farhat, Nada, Daniel McClung, and Jerod Nagel. "Risk Factors for Pseudomonas aeruginosa in Diabetic Foot Infections." Open Forum Infectious Diseases 4, suppl_1 (2017): S108. http://dx.doi.org/10.1093/ofid/ofx163.109.

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Abstract Background Infectious Diseases Society of America guidelines for the management of diabetic foot infections (DFIs) suggest 15 different antibiotic treatment options for moderate-to-severe infections. All treatment options provide coverage for Gram-positive cocci, and some provide coverage for Gram-negative pathogens, including Pseudomonas aeruginosa (PSA). However, there is minimal guidance in determining which patients require anti-PSA therapy. Methods This single-center retrospective case–control study included patients hospitalized between October 2013 and September 2015. Adult pat

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Zhang, Li, Xufeng Gao, Meifang He, Wenyan Wang, and Yuebin Zhao. "Nonlinear association between C-reactive protein and severity of diabetic foot infection in patients with diabetes: A retrospective cohort study with clinical implications." PLOS One 20, no. 5 (2025): e0323704. https://doi.org/10.1371/journal.pone.0323704.

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Objective Diabetic foot infection(DFI) is a frequent complication of diabetes and can lead to significant morbidity and mortality. These are huge economic health burdens for patients, countries, and the world. Timely diagnosis and accurate assessment of the severity of DFI based on sensitive inflammatory biomarkers is critical, with considerable benefits for debridement procedures and antibiotic use. This study aimed to examine the association between C-reactive protein (CRP) levels and the severity of DFI in patients with diabetes. Methods In this retrospective cohort study, we investigate th

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Freccero, P., M. Collington, T. Eden, et al. "Modeling Sustainable, National, Regional and Local Healthcare Systems Based on Childhood Cancer Shared-Care Networks in LMICS." Journal of Global Oncology 4, Supplement 2 (2018): 83s. http://dx.doi.org/10.1200/jgo.18.35200.

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Background: World Child Cancer (WCC) has been working in partnership with pediatric oncology programs in low-middle income countries (LMICs) to support improved services for children with cancer. Central to the success of services is the development of effective shared-care networks situated to match population centers. Literature on how to develop shared-care networks in LMICs does not currently exist. Aim: Modeling sustainable national, regional and local health systems based on childhood cancer shared-care networks in LMICs. Methods: The model was developed through learning from a 3 year UK

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Uçkay, Ilker, Vinoth Yogarasa, Felix W. A. Waibel, et al. "Nutritional Interventions May Improve Outcomes of Patients Operated on for Diabetic Foot Infections: A Single-Center Case-Control Study." Journal of Diabetes Research 2022 (August 5, 2022): 1–6. http://dx.doi.org/10.1155/2022/9546144.

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Aim. While a patient’s nutritional status is known to generally have a role in postoperative wound healing, there is little information on its role as therapy in the multifaceted problem of diabetic foot infections (DFIs). Methods. We assessed this issue by conducting a retrospective case-control cohort study using a multivariate Cox regression model. The nutrition status of the DFI patients was assessed by professional nutritionists, who also orchestrated the nutritional intervention (counselling, composition of the intrahospital food) during hospitalization. Results. Among 1,013 DFI episodes

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Serrano, Isa, Dalila Mil-Homens, Rita F. Pires, et al. "In Vivo Antimicrobial Activity of Nisin Z Against S. aureus and Polyurea Pharmadendrimer PUREG4OEI48 Against P. aeruginosa from Diabetic Foot Infections." Antibiotics 14, no. 5 (2025): 444. https://doi.org/10.3390/antibiotics14050444.

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Background/Objectives: Diabetic foot infections (DFIs) are commonly associated with frequent hospitalizations, limb amputations, and premature death due to the profile of the bacteria infecting foot ulcers. DFIs are generally colonized by a polymicrobial net of bacteria that grows in biofilms, developing an increased antimicrobial resistance to multiple antibiotics. DFI treatment is a hurdle, and the need to develop new therapies that do not promote resistance is urgent. Therefore, the antibacterial efficacy of Nisin Z (antimicrobial peptide), a core–shell polycationic polyurea pharmadendrimer

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Anjie, Jiang. "A Simplified Dynamic Model of DFIG-based Wind Generation for Frequency Support Control Studies." International Journal of Current Science Research and Review 07, no. 10 (2024): 7617–25. https://doi.org/10.5281/zenodo.13889628.

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Abstract : In recent years, wind generation has been fast growing and become one of the major generation resources in power systems. Since the wind generation does not inherently equip with frequency support functions, the power system frequency response degrades as the wind penetration increases. Therefore, frequency support control of wind generation has gained increasing focus. However, the dynamic models of wind generation systems, which are required by the control design and analysis, are commonly very complicated and difficult to obtain, especially for the doubly-fed induction generator

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Soares, Rui Silva, Diana Gomes, Isa Serrano, Eva Cunha, Luís Tavares, and Manuela Oliveira. "Absence of Synergism between a Dual-AMP Biogel and Antibiotics Used as Therapeutic Agents for Diabetic Foot Infections." International Journal of Molecular Sciences 25, no. 1 (2023): 407. http://dx.doi.org/10.3390/ijms25010407.

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Diabetic foot infections (DFIs) are frequently linked to diabetic-related morbidity and death because of the ineffectiveness of conventional antibiotics against multidrug-resistant bacteria. Pexiganan and nisin A are antimicrobial peptides (AMPs), and their application may complement conventional antibiotics in DFI treatment. A collagen 3D model, previously established to mimic a soft-tissue collagen matrix, was used to evaluate the antibacterial efficacy of a guar gum gel containing pexiganan and nisin alone and combined with three antimicrobials toward the biofilms of Staphylococcus aureus a

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Marok, Fatima Zahra, Jan-Georg Wojtyniak, Laura Maria Fuhr, et al. "A Physiologically Based Pharmacokinetic Model of Ketoconazole and Its Metabolites as Drug–Drug Interaction Perpetrators." Pharmaceutics 15, no. 2 (2023): 679. http://dx.doi.org/10.3390/pharmaceutics15020679.

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The antifungal ketoconazole, which is mainly used for dermal infections and treatment of Cushing’s syndrome, is prone to drug–food interactions (DFIs) and is well known for its strong drug–drug interaction (DDI) potential. Some of ketoconazole’s potent inhibitory activity can be attributed to its metabolites that predominantly accumulate in the liver. This work aimed to develop a whole-body physiologically based pharmacokinetic (PBPK) model of ketoconazole and its metabolites for fasted and fed states and to investigate the impact of ketoconazole’s metabolites on its DDI potential. The parent–

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Adria, Agus, Ahmad Syuhada, Tarmizi Tarmizi, and Ira Devi Sara. "DFIG Model for Control Performance Analysis in Wind Power Plants." Applied Mechanics and Materials 927 (June 4, 2025): 61–65. https://doi.org/10.4028/p-wyqk8g.

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Studies on the operation of Wind Power Plants related to the role of the control system are still relatively limited. The role of the control system is very important in the power conversion of power plants. To determine the effect of the power converter control system on the DFIG model wind power plant, modeling of the PLTB with DFIG is needed as well as a control system that can be used for simulations on the network or electric power system. The research thus aims to produce a wind power generation model with a DFIG generator and its control system that can optimally regulate power conversi

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Bharti, O. P., R. K. Saket, and S. K. Nagar. "Controller Design of DFIG Based Wind Turbine by Using Evolutionary Soft Computational Techniques." Engineering, Technology & Applied Science Research 7, no. 3 (2017): 1732–36. https://doi.org/10.5281/zenodo.809531.

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This manuscript illustrates the controller design for a doubly fed induction generator based variable speed wind turbine by using a bioinspired scheme. This methodology is based on exploiting two proficient swarm intelligence based evolutionary soft computational procedures. The particle swarm optimization (PSO) and bacterial foraging optimization (BFO) techniques are employed to design the controller intended for small damping plant of the DFIG. Wind energy overview and DFIG operating principle along with the equivalent circuit model is adequately discussed in this paper. The controller desig

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Putri, Tri Wahyu Oktaviana, Agus Yogianto, and Ibnu Hajar. "Model Doubly Fed Induction Generator (DFIG) untuk Analisis Performa Kontrol pada Pembangkit Listrik Tenaga Angin." Energi & Kelistrikan 12, no. 2 (2020): 179–85. http://dx.doi.org/10.33322/energi.v12i2.1095.

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Studi mengenai pengoperasian pembangkit listrik dari energi terbarukan dengan tenaga angin khususnya terkait dengan peran sistem kontrol pada pembangkit listrik tenaga angin relatif masih sangat terbatas. Peran sistem kontrol sendiri sangat penting di dalam konversi daya pembangkit listrik seperti ini. Oleh sebab itu untuk mengetahui serta menyelidiki pengaruh sistem kontrol konverter daya pada pembangkit listrik tenaga angin khususnya dengan Double-Fed Induction Generator (DFIG) dibutuhkan pemodelan dari pembangkit listrik tenaga angin dengan DFIG serta sistem kontrol yang dapat digunakan unt

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Shahriari, Sayyed Ali Akbar. "Modelling and dynamic state estimation of a doubly fed induction generator wind turbine." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 6 (2020): 1393–409. http://dx.doi.org/10.1108/compel-07-2019-0277.

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Purpose This paper aims to propose an 18th-order nonlinear model for doubly fed induction generator (DFIG) wind turbines. Based on the proposed model, which is more complete than the models previously developed, an extended Kalman filter (EKF) is used to estimate the DFIG state variables. Design/methodology/approach State estimation is a popular approach in power system control and monitoring because of minimizing measurement noise level and obtaining non-measured state variables. To estimate all state variables of DFIG wind turbine, it is necessary to develop a model that considers all state

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Wu, Xu, Jingjing Wang, Dawei Xie, Wei Peng, and Li Mai. "Static model of DFIG wind farms considering control strategies." Journal of Physics: Conference Series 2741, no. 1 (2024): 012057. http://dx.doi.org/10.1088/1742-6596/2741/1/012057.

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Abstract The static equivalent models of DFIG grid-connected currents vary under different control strategies. Traditional static equivalent algorithms fail to consider these differences, posing risks in static security analysis. In this study, based on the internal structure of DFIG, grid-connected current models for DFIG under different control strategies are established. The appropriate model is selected during the current calculation process based on the coupling relationship between active power (P) and reactive power (Q) of DFIG. Subsequently, generator nodes to be retained are selected

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Meddah, Atallah, Abdelkader Mezouar, Kheira Belgacem, Youcef Saidi, and Mohammed Amine Benmahdjoub. "Modeling and Power Control of 5th model and 3rd order model for DFIG Applied of Wind Conversion System." International Journal of Energetica 6, no. 2 (2021): 44. https://doi.org/10.47238/ijeca.v6i2.170.

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In this study, a comparison between the fifth-order model and the third-order model of the Doubly Fed Induction Generator (DFIG) is presented. This paper aims to study and analyze transient stability for the fifth-order and third-order models. The fifth-order model of the DFIG is based on five differentials equations. Neglecting the stator transients from the fifth-order model of the DFIG, we get the third-order. On startup and control of the power system that the third-order model produces better results than the fifth-order model in the transient regime. The performance of the two models on

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Gianto, Rudy. "Constant Power Factor Model of DFIG-Based Wind Turbine for Steady State Load Flow Studies." Energies 15, no. 16 (2022): 6077. http://dx.doi.org/10.3390/en15166077.

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DFIG (Doubly Fed Induction Generator)-based WPP (Wind Power Plant) is the most popular type of wind-driven electric power generation configuration. The main reason for its popularity is that the DFIG system can capture wind energy more optimally than other WPP configurations. Due to the increasing penetration of WPP in power systems, the need to study its impact on power system performance is becoming increasingly important. To enable such a study to be conducted properly, the first and probably the most crucial step is to model all system components (including the WPP). This paper proposes a

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Han, Pingping, Yu Zhang, Lei Wang, Yan Zhang, and Zihao Lin. "Model Reduction of DFIG Wind Turbine System Based on Inner Coupling Analysis." Energies 11, no. 11 (2018): 3234. http://dx.doi.org/10.3390/en11113234.

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The doubly-fed induction generator (DFIG) wind turbine system, which is composed of the wind turbine, generator, rotor-side converter, grid-side converter, and so on, is a typical multi-time scale system. The dynamic processes at different time scales do not exist in isolation. Furthermore, neglecting the coupling of parameters of different time scales to reduce the order of the model will lead to deviation between the simulation results and the actual results, which may not be suitable for power system transient analysis. This paper proposes an electromechanical transient model and an electro

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Bharti, O. P., R. K. Saket, and S. K. Nagar. "Controller Design For DFIG Driven By Variable Speed Wind Turbine Using Static Output Feedback Technique." Engineering, Technology & Applied Science Research 6, no. 4 (2016): 1056–61. https://doi.org/10.5281/zenodo.60980.

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This paper describes the controller design for a DFIG based wind energy generation system using the static output feedback technique through the LMI Toolbox. The features of the DFIG, its converters and their controllers are discussed. The lower order nominal representation of DFIG is obtained using numerical differentiation of the SIMULINK model which is subsequently used for PID controller design. The obtained results are compared with existing methods for performance enhancement of the DFIG and wind energy conversion systems.  

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N., Muhammad,, Manu, H.I., Maina Bukar, Y., and Abdullahi, Y.R. "CLIMATIC VARIABILITY AND LIVELIHOOD VULNERABILITY IN KADUNA STATE, NIGERIA." International Journal of Climatic Studies 1, no. 1 (2017): 36–53. http://dx.doi.org/10.47604/ijcs.432.

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Purpose: This paper focused on livelihood vulnerability induced by climatic variability amongst farming households in Kaduna state, Nigeria. Methodology: The research used a sample population of 400 using Taro Yamane formula which represents about 0.05% of the population of the three selected local government areas and it purposively targeted farming households heads (FHHH) in one of each of the three eco-climatic zones in the state. Kagarko, BirninGwari and Makarfi local government areas were based on their eco-climatic location and rurality to represent humid, sub-humid and dry sub hum

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Nassim, Kharmoum, Retal Sara, El Bouchti Karim, Rhalem Wajih, and Ziti Soumia. "An automatic alignment of the business process and business value models: a novel MDA method." An automatic alignment of the business process and business value models: a novel MDA method 30, no. 1 (2023): 501–9. https://doi.org/10.11591/ijeecs.v30.i1.pp501-509.

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With the massive development of end-users requirements, the model alignment has become an essential stage in software engineering, especially in the model driven architecture (MDA) approach, to absorb the end-user’s need. The purpose is to facilitate the alignment of new models from existing ones. Our contribution in this paper is to deal with the MDA higher abstraction lever by focusing on the automatic alignment of the business value with the business process models for the information system (IS). For our case, the data-flow diagram (DFD) illustrates the business process model, and th

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Guo, Li Sa. "Transient Stability of Wind Power System with DFIG." Advanced Materials Research 986-987 (July 2014): 635–38. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.635.

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Analyzed mathematical model of wind power which consist doubly-fed wind turbine (DFIG).Strategies for pitch angle control were developed.Used MATLAB to establish equivalent model contain infinite power system concluding DFIG ,The results showed that wind power with DFIG have good transient stability.

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Gianto, Rudy, Purwoharjono, Fitri Imansyah, Rudi Kurnianto, and Danial. "Steady-State Load Flow Model of DFIG Wind Turbine Based on Generator Power Loss Calculation." Energies 16, no. 9 (2023): 3640. http://dx.doi.org/10.3390/en16093640.

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Penetration of wind power plants (WPPs) in the electric power system will complicate the system load flow analysis. Consequently, the traditional load flow algorithm can no longer be used to find the solution to the load flow problem of such a system. This paper proposes a doubly fed induction generator (DFIG)-based WPP model for a load flow analysis of the electric power system. The proposed model is derived based on the power formulations of the WPP—namely, DFIG power, DFIG power loss, and WPP power output formulas. The model can be applied to various DFIG power factor operating modes. In th

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Chongjarearn, Yutana. "Doubly-Fed Induction Generator Wind Turbine Model for Fault Ride-Through Investigation." ECTI Transactions on Electrical Engineering, Electronics, and Communications 11, no. 1 (2012): 32–36. http://dx.doi.org/10.37936/ecti-eec.2013111.170603.

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The paper presents an investigation into the behavior of a grid-connected, wind turbine driven Doubly-Fed Induction Generator (DFIG) during Grid faults which are represented by a voltage dip on all three phases of the voltage supply. Stator-voltage- oriented vector control is used to decouple the active and reactive power generated by the machine. The dynamic DFIG model is used to simulate the behaviour of the wind turbine generator during both normal and fault conditions. Simulation and experiment results are shown in a very good agreement. Further the model can be used to investigate Fault r

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Sun, Tingting, Hongru Shi, Lei Ren, and Jiejie Huang. "Analysis of Frequency Regulation Capability of Doubly Fed Induction Generator and Supercapacitor Energy Storage Based on Dynamic Power Flow." Energies 16, no. 20 (2023): 7059. http://dx.doi.org/10.3390/en16207059.

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The grid-integrated doubly fed induction generator (DFIG) is required to participate in the frequency regulation of the power system. The supercapacitor energy storage (SES) is capable of enhancing the frequency regulation capability of the DFIG in a coupled manner. The SES is connected to the DC capacitor of the DFIG and provides active power response through the droop control. The dynamic power flow (DPF) model is established to quantify the frequency response of the power system when the DFIG-SES system participates in the frequency regulation. The integration of the SES affects the interna

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Mahroug, Rabiaa, Mohamed Matallah, and Salam Abudura. "Modeling of wind turbine based on dual DFIG generators." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 2 (2022): 1170. http://dx.doi.org/10.11591/ijpeds.v13.i2.pp1170-1185.

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In order to investigate a viable approach to fully exploit the wind speed, the present work investigates the application of a novel wind turbine consisting of dual doubly-fed induction generators (DFIG). The model can be further used to apply in areas where the winds are high to achieve high conversion efficiency in order to produce large electric power and increase the wind turbine capacity with an economy of hardware on the one hand, and to reduce the installation cost on the other. Furthermore, this model is always guarantees the continuity of power production because if one generator fails

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37

Rabiaa, Mahroug, Matallah Mohamed, and Abudura Salam. "Modeling of wind turbine based on dual DFIG generators." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 2 (2022): 1170–85. https://doi.org/10.11591/ijpeds.v13.i2.pp1170-1185.

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Abstract:

In order to investigate a viable approach to fully exploit the wind speed, the present work investigates the application of a novel wind turbine consisting of dual doubly-fed induction generators (DFIG). The model can be further used to apply in areas where the winds are high to achieve high conversion efficiency in order to produce large electric power and increase the wind turbine capacity with an economy of hardware on the one hand, and to reduce the installation cost on the other. Furthermore, this model is always guarantees the continuity of power production because if one generator fails

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38

Pouget, Cassandra, Claude-Alexandre Gustave, Christelle Ngba-Essebe, et al. "Adaptation of Staphylococcus aureus in a Medium Mimicking a Diabetic Foot Environment." Toxins 13, no. 3 (2021): 230. http://dx.doi.org/10.3390/toxins13030230.

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Staphylococcus aureus is the most prevalent pathogen isolated from diabetic foot infections (DFIs). The purpose of this study was to evaluate its behavior in an in vitro model mimicking the conditions encountered in DFI. Four clinical S. aureus strains were cultivated for 16 weeks in a specific environment based on the wound-like medium biofilm model. The adaptation of isolates was evaluated as follows: by Caenorhabditis elegans model (to evaluate virulence); by quantitative Reverse Transcription-Polymerase Chain Reaction (qRT-PCR) (to evaluate expression of the main virulence genes); and by B

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39

Fernando, Mesa, Correa Vélez Germán, and José Barba Ortega José. "Stability by assigning structures by applying the multivariable subspace identification algorithm for a wind system with a DFIG." TELKOMNIKA 21, no. 04 (2023): 901–8. https://doi.org/10.12928/telkomnika.v21i4.24431.

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In this paper, a controller for a doubly fed induction generator (DFIG) connected to a wind system is proposed. This control assigning its own structures as an optimal control method, the electric model in the DFIG state space is also shown, for which it is expected to estimate a linear model through the subspace technique and thus to design the controller. It will be possible to show that a structure assignment controller is undoubtedly a good option for the control of multivariable systems. The results of the output signals will be analyzed when applying the controller, assigning their own s

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Yan, Gangui, Dan Wang, Qi Jia, and Wenbo Hu. "Equivalent Modeling of Dfig-Based Wind Farms for Sub-Synchronous Resonance Analysis." Energies 13, no. 20 (2020): 5426. http://dx.doi.org/10.3390/en13205426.

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The order of the detailed model of doubly-fed induction generator (DFIG) wind farms are too high and the simulation is difficult. Most of the existing research has used a single-machine equivalent model and clustering aggregation model for equivalence and few papers have explored the principles and equivalent conditions of the single-machine equivalent model under sub-synchronous resonance (SSR). Due to this reason, this paper equates DFIG wind farms connected with series compensated transmission network to two separate units based on the principle of matrix similarity transformation and the m

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41

Othmane, Boughazi, Bouiri Abdesselam, and Benoudjafer Cherif. "A robust new full control strategy without FOANR based on substitution method against nonlinear DFIG model for wind application." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 3 (2022): 1696. http://dx.doi.org/10.11591/ijpeds.v13.i3.pp1696-1703.

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In order to control the output power of wind application (WA) based on doubly fed induction generator (DFIG). The simple control (SC) strategy based on approaches via flux orientation and neglecting resistance (FOANR) to decoupled axes is the most common used in many previous studies, However this strategy FOANR present a linear synthesis, mainly to control DFIG simple model sensitive to internal and external disturbances, This research paper contribute to developed a robust new full control (FC) strategy based on substitution method (SM) to solving nonlinear coupled axes without FOANR to cont

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42

Boughazi, Othmane, Abdesselam Bouiri, and Cherif Benoudjafer. "A robust new full control strategy without FOANR based on substitution method against nonlinear DFIG model for wind application." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 3 (2022): 1696–703. https://doi.org/10.11591/ijpeds.v13.i3.pp1696-1703.

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Abstract:

In order to control the output power of wind application (WA) based on doubly fed induction generator (DFIG). The simple control (SC) strategy based on approaches via flux orientation and neglecting resistance (FOANR) to decoupled axes is the most common used in many previous studies, However this strategy FOANR present a linear synthesis, mainly to control DFIG simple model sensitive to internal and external disturbances, This research paper contribute to developed a robust new full control (FC) strategy based on substitution method (SM) to solving nonlinear coupled axes without FOANR to cont

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43

Li, Jun You, Wen Ying Liu, Wei Wang, Jia Yu Fu, and Ning Bo Wang. "The Dynamic Interactional Model of SVC and DFIG to Maintain Grid Voltage." Advanced Materials Research 724-725 (August 2013): 506–11. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.506.

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This paper mainly introduces the dynamic interactional model of SVC and DFIG to ensure the stability of the voltage when wind power generator access to grid massively. Firstly, we analysis the control characteristics based on the dynamic model of SVC and DFIG. Based on the characteristics we establish the dynamic interactional model of them. By using a simplified model of wind power access to the grid, we prove that the voltage of the access point to the grid will stay in the reasonable range through the interaction of SVC and DFIG providing reactive power when the wind power output fluctuates

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Kendzi, Mohammed, Abdelghani Aissaoui, Dris Younes, Abdesselam Bouiri, and Mabrouk Haddar. "Management power of renewable energy in multiple sources system to feeding the rotor of a doubly-fed induction generator." Bulletin of Electrical Engineering and Informatics 12, no. 2 (2023): 619~632. https://doi.org/10.11591/eei.v12i2.3885.

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The purpose of this paper is the elimination of interruptions of electrical energy produced by a multi-source production system, so we have assured the feed of DFIG rotor in a wind system by different energy sources (photovoltaic generator, battery group) and switchover between them by auxiliary contacts controlled by a supervisor via a power control algorithm. For the photovoltaic generator, a controller for tracking the maximum power point is designed using direct search approach perturb & observe method. For the battery group, the installation of a number of the capacitor battery elemen

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Zhang, Hanhua, Haiqiang Jin, Tongtong Wang, and Jun Wen. "DFIG Model Suitable for SSR Research." IOP Conference Series: Materials Science and Engineering 853 (June 12, 2020): 012017. http://dx.doi.org/10.1088/1757-899x/853/1/012017.

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Feng, Peiru, Jiayin Xu, Zhuang Wang, Shenghu Li, Yuming Shen, and Xu Gui. "Impact of Phase Angle Jump on a Doubly Fed Induction Generator under Low-Voltage Ride-Through Based on Transfer Function Decomposition." Energies 17, no. 19 (2024): 4778. http://dx.doi.org/10.3390/en17194778.

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During the fault period, a phase angle jump may occur at the stator or the point of common coupling, which will deteriorate the low-voltage ride-through (LVRT) characteristics of a doubly fed induction generator (DFIG). The existing LVRT studies focus on the impact of a voltage drop on DFIGs but often ignore that of a phase angle jump. The time-domain simulation is accurate in describing the response of a DFIG during the LVRT process, but it is time-consuming for a DFIG with the full-order model. In this paper, by using the voltage magnitude and phase angle of the stator or the point of common

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Döşoğlu, M. Kenan, and Muhsin Uğur Doğan. "Enhancement of Low Voltage Ride Through (LVRT) Capability of DFIG-Based Wind Turbines with Enhanced Demagnetization Control Model." Energies 17, no. 16 (2024): 4015. http://dx.doi.org/10.3390/en17164015.

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Since the stator of DFIG-based wind turbines is directly connected to the grid, it is dramatically affected by transient situations that may occur on the grid side. In order to meet grid code requirements, reactive power support must be provided to keep the DFIG connected to the grid during the transient state. To achieve this, Low Voltage Ride Through (LVRT) capability needs to be implemented in the grid-connected DFIG. Depending on the grid code requirements, different control models are used to provide LVRT capability. In this study, the demagnetization control model was developed in DFIG.

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Hamiani, Hichem, Ali Abderrazak Tadjeddine, Iliace Arbaoui, Sofiane Bendelhoum Mohammed, and Abdelkrim Benali. "A new robust SIDA-PBC approach to control a DFIG." Bulletin of Electrical Engineering and Informatics 12, no. 3 (2023): 1310~1317. https://doi.org/10.11591/eei.v12i3.2155.

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Credible control and overall stabilization of closed-loop nonlinear systems presented in a port-controlled hamiltonian structure (PCH-D) were forever the development of the simultaneous interconnection and damping assignment passivity-based control (SIDA-PBC) method. The robustness and reliability of the method called into question against noise and certainly modelling errors. Indeed, a new scheme has been presented to control a doubly fed induction generator (DFIG) based on the energy form and exploiting the electrical parameters of the closed loop system. The results obtained provide a new t

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Cai, Guowei, Cheng Liu, Deyou Yang, and Nantian Huang. "Design of Nonlinear Robust Rotor Current Controller for DFIG Based on Terminal Sliding Mode Control and Extended State Observer." Mathematical Problems in Engineering 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/201938.

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As to strong nonlinearity of doubly fed induction generators (DFIG) and uncertainty of its model, a novel rotor current controller with nonlinearity and robustness is proposed to enhance fault ride-though (FRT) capacities of grid-connected DFIG. Firstly, the model error, external disturbances, and the uncertain factors were estimated by constructing extended state observer (ESO) so as to achieve linearization model, which is compensated dynamically from nonlinear model. And then rotor current controller of DFIG is designed by using terminal sliding mode variable structure control theory (TSMC)

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50

Rudy Gianto. "Pemodelan Pembangkit Listrik Tenaga Bayu Kecepatan Variabel untuk Analisis Aliran Daya." Jurnal Nasional Teknik Elektro dan Teknologi Informasi 11, no. 3 (2022): 222–28. http://dx.doi.org/10.22146/jnteti.v11i3.1749.

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Akhir-akhir ini, pemanfaatan energi angin melalui pembangkit listrik tenaga bayu (PLTB) kecepatan variabel untuk pembangkitan daya listrik telah mengalami peningkatan yang cukup signifikan. Hal ini berbanding terbalik dengan PLTB kecepatan tetap yang penggunaannya semakin menurun. Pesatnya perkembangan PLTB kecepatan variabel ini terjadi terutama karena PLTB tersebut dapat mengekstraksi atau menangkap energi angin secara lebih optimal dibandingkan PLTB kecepatan tetap. Operasi kecepatan variabel pada suatu PLTB dapat dicapai melalui aplikasi doubly fed induction generator (DFIG) sebagai konver

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