scholarly journals Analysis of the operation characteristics of a selected wind power plant

2018 ◽  
Vol 70 ◽  
pp. 01016
Author(s):  
Karol Tucki ◽  
Anna Bączyk ◽  
Izabela Wielewska ◽  
Michał Piątkowski
Keyword(s):  
Wind Farm ◽  
Electricity Production ◽  
Wind Power Plant ◽  
Method Of Calculation ◽  
Wind Speeds ◽  
Total Capacity ◽  
Two Stages ◽  
The Impact ◽  
Operation Characteristics

The purpose of this paper was to analyse the operation of a wind farm and the wind turbine yields with a total capacity of 46.5 MW. The analysis was divided into two stages: (1) the general characteristics of the facility, which included: a) distribution of wind speeds and the method of calculation and visualisation of the estimated electricity production, b) evaluation of the wind farm operation as per type of tested turbine and the wind farm terrain and (2) the impact of the facility on the quality of electricity in the distribution network.

scholarly journals Wind energy system in Ambocas-Ecuador: distributed generation and energy quality

2021 ◽  
Vol 19 ◽  
pp. 609-613
Author(s):  
O. Cabeza-Gras ◽  
◽  
V. Jaramillo-García ◽  
Keyword(s):  
Distributed Generation ◽  
Wind Farm ◽  
Energy System ◽  
Electricity Production ◽  
Economical Analysis ◽  
Electricity System ◽  
Voltage Drops ◽  
Wind Energy System ◽  
Full Operation

In this communication we present the construction of a wind farm, WF, with 10 MW of nominal power. This WF will increase the quantity and quality of electricity in the area of Ambocas, Loja, Ecuador, strengthen a system with many voltage drops. The place chosen is ideal, because it is long from population, in a hill side near an existing road. Wind is persistent and has a constant orientation all along the year. The generated power will be connected with the electricity system in the Portovelo Substation, which is about 12 km from the WF site. We have calculated the expected electricity production all along the year taking into account all important data to simulate successfully the WF operation in real conditions. We have also modelled the interconnexion of the WF with the substation and its effect in the 69 kV bar. Finally, a brief economical analysis of the project gives an annual average profit higher than 3.5 USD million without taxes, while the inversion would be cancelled in less than 5 years of the 20 ones planned for the WF in full operation.

Abstract 130: Clinically Important Difference in the Atrial Fibrillation Effect on QualiTy-of-Life (AFEQT) Score: Results from the ORBIT-AF Registry

2016 ◽  
Vol 9 (suppl_2) ◽  
Author(s):  
DaJuanicia N Simon ◽  
Laine E Thomas ◽  
Emily C O’Brien ◽  
Gregg C Fonarow ◽  
Bernard J Gersh ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Atrial Fibrillation ◽  
Important Change ◽  
Operating Characteristics ◽  
Method Of Calculation ◽  
Clinically Important Difference ◽  
The Mean ◽  
The Impact

Background: The Atrial Fibrillation Effect on QualiTy-of-Life (AFEQT) survey has recently been validated to measure the impact of atrial fibrillation on patients’ quality of life, but a clinically important difference (CID) in AFEQT score has not been defined. Knowing the CID is needed to interpret the meaningfulness of differences between treatments in clinical trials; or patient populations for quality assessment. Objectives: To calculate CID values in AFEQT in the ORBIT registry. Methods: ORBIT-AF is a US-based outpatient AF registry that measured disease-specific QoL with the AFEQT tool (score range= 0 (worst) to 100) at baseline and at 1 year follow-up. Two anchor-based methods were used to relate changes in AFEQT to clinically important differences in the more established European Heart Rhythm Association (EHRA) measure of functional status. Ranging from 1 (no symptoms) to 4 (disabling), a change of 1 EHRA class was defined as an important change in the anchor. Both the mean change and receiver operating characteristics (ROC) methods were then used to identify CIDs in AFEQT at 1 year follow-up. This was done for both improvement and worsening on the anchor. The mean change method defines a CID as the mean change in AFEQT score among patients with a 1 EHRA class change. The ROC method identifies a CID as the point on the ROC curve that best discriminates patients who experienced an important change in the anchor (≥ 1 EHRA class change) from those who experienced no change. Results: AFEQT was assessed in 2008 AF patients at baseline and 1347 patients at 1 year from 99 US sites participating in ORBIT-AF. CIDs and 95% confidence intervals (CI) corresponding to an improvement in EHRA for the mean change method were 5.4 (3.6, 7.2) AFEQT points and 1.9 (0.4, 9.3) AFEQT points for the ROC method. CIDs corresponding to worsening in EHRA for the mean change method were -4.2 (-6.9,-1.5) AFEQT points and -7.4 (-13.9,-4.6) AFEQT points for the ROC method. Conclusions: Changes in AFEQT as small as 2 points may be clinically relevant, although CIDs vary depending on the method of calculation. The variability suggests identifying a single universal CID to assess improvement in quality of life in AF patients may not be ideal and improvement may relate to the nature of a patient’s symptoms and their baseline level of activity.

Assessment of wind power capacity credit in Morocco: Outlook to 2020

2019 ◽  
Vol 44 (2) ◽  
pp. 196-207
Author(s):  
Yassir El Karkri ◽  
Aboubakr El Makrini ◽  
Hassane El Markhi ◽  
Tijani Lamhamdi ◽  
Hassan El Moussaoui
Keyword(s):  
Wind Energy ◽  
Wind Farm ◽  
Electric Energy ◽  
Wind Farms ◽  
Electricity Production ◽  
Second Phase ◽  
Energy Integration ◽  
Production Network ◽  
Two Phases ◽  
The Impact

The present article focuses on the calculation of the wind capacity credit by integrating the Moroccan project on the wind energy of 1000 MW in 2020. After an introduction to the Moroccan Integrated Wind Energy Project, a wind capacity credit assessment program will be implemented on Matlab software including the whole information about “installed capacity, number of plants, failure rate, types of installed units, peak demand etc.” This program will be used to calculate the safety rate of an electrical system as well as the capacity credit of Morocco’s electricity production network. This section will be built in two phases: the first phase will examine the impact of TAZA wind farm with an installed power of 150 MW, while the second phase will focus on the generalization of this study on all the wind farms that will be injected to the Moroccan grid in 2020. The research provides conclusion according to comments and assessment of the impact of this electric energy integration based on the wind generation.

scholarly journals WIND POWER PLANT PARAMETERS OPTIMIZATION MODEL

2021 ◽  
Vol 5 (1(82)) ◽  
pp. 35-41
Author(s):  
G. Sidorenko ◽  
A. AlJamil
Keyword(s):  
Power Plant ◽  
Wind Power ◽  
Wind Turbines ◽  
Optimization Model ◽  
Wind Farm ◽  
Economic Life ◽  
Parameters Optimization ◽  
Electricity Production ◽  
Wind Power Plant ◽  
Wake Effect

A technical and economic model of a wind power plant has been developed. Parameterization was carried out and the main parameters of the wind power plant were identified. Statistical relationships of parameters with capital investments in wind turbines and costs of their operation and maintenance were established. The criterion for the search for optimal parameters is taken as the minimum discounted unit costs for the production of electrical energy for the economic life of the wind power plant. To do this, the electricity production in a wind power plant must be maximized by reducing the so-called wake effect that is created in a wind farm due to the shading of some wind turbines by others. The velocity reduction behind each wind turbine is estimated. An algorithm for optimizing the parameters of a wind power plant has been developed. An optimization model was used to determine the parameters of the Hasia wind power plant.

scholarly journals Power System Voltage Stability analysis with Renewable power Integration

2021 ◽  
Vol 10 (6) ◽  
pp. 114-117
Author(s):  
Sinan M ◽  
Sivakumar W M ◽  
Anguraja R
Keyword(s):  
Power System ◽  
Voltage Stability ◽  
Wind Farm ◽  
Stability Margin ◽  
Wind Farms ◽  
Wind Speeds ◽  
Voltage Instability ◽  
Renewable Power ◽  
Power Difference ◽  
The Impact

The purpose of this research is to find the loading limit of a power system before hitting voltage instability and to assess the margin to voltage instability of a system consisting of a wind farm. An index called Bus Apparent Power Difference Criterion (BSDC) is used to find maximum loadable point. The measure depends on the way that in the region of the voltage collapse no extra apparent power can be delivered to the affected bus. The analysis is performed combination of wind power injection at different wind speeds and line outages in the network. In the feasibility and siting studies of wind farms the steady state analysis with network contingencies give the utility or the developer a sense of network condition upon the injection of power in the network. However, the extent of voltage stability impacted due to load growth in the system is not assessed. The research paper makes way to assess the impact on voltage stability margin with obtaining the maximum loadable point of the system and assessing the best suited bus to integrate a wind farm into the system.

scholarly journals INCREASING ELEMENTARY SCHOOL EDUCATION QUALITY THROUGH COMMITTEE SCHOOL PARTICIPATION APPROACH

2020 ◽  
Vol 12 (2) ◽  
pp. 428-438
Author(s):  
Lukman Hakim
Keyword(s):  
Elementary School ◽  
Data Analysis ◽  
Community Participation ◽  
School Education ◽  
Education Quality ◽  
Elementary School Education ◽  
Two Stages ◽  
The Impact ◽  
Education Process

The aim of study was to find out the approach of to develop of community participation in improving the quality of education process. Community had the important role in education because the community gave the impact on education quality progress. The research used descriptive qualitative approach. Data collection techniques consisted of observation, interviews, and documentation. Data analysis was carried out in two stages, namely (1) data analysis in single or individual cases and (2) cross-case data analysis. The results of the study concluded that the approach of community participation in the implementation of elementary school education programs in Mataram is the school as a community center. The implication of the results is the concept of developing the community in the process of elementary school education in Mataram and increasing awareness of all parties in formulating the concept of education process.

Research of Influence of Obstacles on Three-Dimensional Hill Wind Field

2013 ◽  
Vol 448-453 ◽  
pp. 1712-1715
Author(s):  
Rui Yang ◽  
Ting Ting Wang ◽  
Wei Wei Xia
Keyword(s):  
Flow Field ◽  
Wind Farm ◽  
Three Dimensional ◽  
Wind Farms ◽  
Wind Pressure ◽  
Wind Speeds ◽  
Wind Speed Distribution ◽  
The Hill ◽  
The Impact ◽  
Inlet Boundary Condition

At different wind speeds, in order to study the impact of obstacle size and distance to the bottom of the hill on wind farm, using Pro / E generates the model of hills and upstream obstacle, sinusoidal model was selected to the hill contour, then Fluent was adopted to analyze the flow field, turbulence model select the SSK k-ω, inlet boundary condition was exponential function. Wind speed distribution and wind pressure distribution of hill surface at each case were depicted by the simulation results; the obstacle of conducive for wind farms was obtained by comparing flow field distribution of each case.

scholarly journals Evaluation of the quality of life and the impact of pain in patients with temporomandibular disorder

2021 ◽  
Vol 10 (2) ◽  
pp. 215-220
Author(s):  
Claudio Marcio Rodrigues Santana Junior ◽  
Victor Augusto Alves Bento ◽  
Edilson José Zafalon ◽  
Maria Cristina Mesquita ◽  
Daisilene Baena Castillo
Keyword(s):  
Quality Of Life ◽  
Family Relationships ◽  
Negative Impact ◽  
Temporomandibular Disorder ◽  
Public Institution ◽  
Significance Level ◽  
The Mean ◽  
Two Stages ◽  
The Impact

Objective: To evaluate the quality of life and the impact of pain in patients with Temporomandibular Disorder (TMD) Muscle/joint TMJ of a public institution in Brazil. Methods: The study consisted of two stages: the first step was the application of the Ohip-14 questionnaires, Fonseca's Anamnestic Questionnaire and the McGill Questinionaire (Br-MPQ). In the next step, after the clinical treatment, only the Ohip-14 questionnaire was applied to compare the results after the treatment. The significance level was set at α = 0,05. Results: Overall, 100 individuals were examined and diagnosis with TMD Muscle/joint TMJ. The score OHIP-14 scale before the treatment was 30.02 ± 1.26 (mean ± standard error of the mean) points, being that after treatment it was 8.94 ± 0.63 points, statistically significant (p<0,001). The mean score in the Fonseca scale was 73.25 ± 1.93 points. Regarding the Br-MPQ, the results showed that TMD pain affects the patient in the area of work, leisure, home activities, family relationships, relationships with friends, sleep and appetite. Conclusion: SERDOF-DTM patients had severe TMD with a negative impact on quality of life, directly affecting their daily activities. The treatment proved to be effective in improving this condition.

scholarly journals The Impact of Physical Education Classes on Health and Quality of Life during the COVID-19

2021 ◽  
Vol 11 (19) ◽  
pp. 8813
Author(s):  
Jiceh-Der Dong Fang ◽  
Pi-Cheng Teng ◽  
Fong-Jia Wang
Keyword(s):  
Quality Of Life ◽  
Physical Activity ◽  
College Students ◽  
Physical Education ◽  
Well Being ◽  
Physical Education Class ◽  
Effective Activity ◽  
Two Stages ◽  
The Impact

The purpose of this study was to examine the effects of the COVID-19 pandemic on the well-being and the quality of life of college students participating in physical education classes. We consider this study to be relevant because during the COVID-19 pandemic we tested whether the boost in effective activity among physical education class participants affected well-being and quality of life. A sectional questionnaire survey was conducted across Taiwan in 2019–2020. Data were collected in two stages within 6 months from a sample of 1011 university students in Taiwan (328 male, 683 female). A series of one-way ANOVAs was adopted to examine each outcome across groups and time phases. The results provide support for a positive relationship between well-being (β = 0.25, p < 0.001), and quality of life (β = 0.92, p < 0.001), supporting our expectations. Findings from our study suggest that physical activity was positively associated with mental health; and participation in physical activity had an effect on the well-being and quality of life in college students.

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