A Comparative Experimental Investigation of MPPT Controls for Variable Speed Wind Turbines

This work presents an experimental comparative investigation between Maximum power point tracking control methods used in variable speed wind turbines. In order to enhance the efficiency of the wind turbine system, the maximum power point tracking control has been applied for extracting and exploiting the maximum available wind power. Furthermore, two maximum power point tracking controls have been analyzed, developed, and investigated in real-time using Dspace. The first was optimal torque control without speed control, whereas the second was with speed control. The maximum power point tracking control performance comparison has been performed in a real-time experimental validation to illustrate the advantages of these control on the real wind energy system. The results have been achieved and discussed, where the power efficiency improvements appeared in the transit time and in the steady-state as well. In addition, the proposed optimal torque control for maximum power point tracking with speed control decreased the response time and oscillations, while it increased the power to an interval of 12,5% to 75% compared to that of strategy without speed control in the steady-state and transit state, respectively

QUALITY OF LIFE AND ITS GENERATING FACTORS IN HEMODIALYSIS PATIENTS HOSPITALIZED AT THE REGIONAL HOSPITAL IDRISSI KÉNITRA MOROCCO

To assess the quality of life of patients with chronic end-stage renal failure under hemodialysis, and to determine its main generators in hemodialysis patients. This is a descriptive and analytical cross-sectional study carried out at the regional hospital of Kénitra (Morocco) in the level of the hemodialysis unit during a period of 3 months with 70 hemodialysis patients diagnosed and treated for chronic renal failure. Data were collected using a questionnaire comprising the socio-demographic, clinical, and nutritional characteristics of Hemodialysis patients and a KDQOL scale (Kidney Disease Quality Of Life) that assesses the quality of life. The scores of the KDQOL-36 were used to assess family, social support, and social support from caregivers. The average age was 51.66± 15.96 years with 57.1% of patients who are female. The components of the quality of life studied show an alteration in the quality of life with a decrease in the scores of the “component of physical health” dimensions with a score of 27.64 ± 29.13,“Component of mental health” with a score of 37.81 ± 22.99, “effects of kidney disease on daily life” with a score of 48.41 ± 21.22 and “burdens of kidney disease” with a score of 28.47 ± 21.50. While the dimension “Symptoms / problems of kidney disease” remains close to normal with a score of 64.61 ± 17.98. Our results showed that certain dimensions of the quality of life correlate with age, sex, family situation, level of education, the presence of a transplant plan, the presence of comorbidities and the duration of hemodialysis. Our study also found a correlation between family social support and quality of life in its “Burdens of Kidney Disease”, “Effects of Kidney Disease on Daily Living”, and the overall quality of life score. On the other hand, there is no significant relationship with support from caregivers. The quality of life of hemodialysis patients is deteriorating. It is influenced by several parameters including family and caregiver social support. The involvement of the family and the health care team in the psychological support process is paramount