Modeling And Simulation Of Wind Turbine For Partial Load Operation

The purpose of this research is mainly to model a wind turbine with doubly fed induction generator (DFIG) and to investigate its behavior in partial load operation using computer simulation. System behavior analysis and simulation are two particular approaches applied in this research. The wind turbine model is developed whereby the behavior of its main components is described by mathematical model and transformed in simulation model in MATLAB/Simulink. The simulation model is carried out in partial load operation at a wind speed of 9 m/s. The physical quantities including generator speed, torque and electrical power output are measured and evaluated. By using variable speed generator, a wind turbine model with optimum power generation at wind speed between 4 m/s to 13 m/s is created. This research shows that if mathematical models represent the wind turbine accurately, then the proposed model can be used to observe the dynamic behavior of wind turbine precisely, efficiently and inexpensively. The simulation result is expected to be a reference for extending the knowledge of dynamic behavior of wind turbines and optimize the performance of future large-scale wind turbine systems

Conceptual Design Approach And Ergonomics Analysis Of Fire Resistant Purpose Shield

Shield was used as protection from danger centuries ago. Until this moment, there was still no shield available for firefighting purpose in safe and rescue operation. This factor has put a limit to firefighters, causing death to many victims who were in critical and dangerous situation. In this project, conceptual design will be proposed aimed to protect firefighters against fire and heat. The project was based on the existing design of Federal Reserve Unit (FRU) shield and innovated by adding the application of resisting fire. The methodology used are customer survey to fire fighters, house of quality in defining customers' needs, morphological chart in defining concepts, Rula-analysis in measuring ergonomic score and Pugh method for selection of best design. Carbon fibre was selected as the main material for the shield because it has a very low material density of approximately 1.75 g/cm3 and very high melting point of approximately 3500 °C. In Rula-Analysis, the ergonomics final score was 3. Results show that carbon fibre is appropriate for lightweight and fireresistant shield. Ergonomics score of 3 for standing and kneeing position while holding shield is acceptable and further investigation can be recommended

Coding Template Of Sensorless Sun Tracking Using Azimuth-Elevation Mode

The next explosion in solar power research was in 1997 as consequence to Kyoto Protocol. This protocol outlined the effect of greenhouse emission which endangers our Earth. As the result, research in solar power field started to take its path again. This work is a part of the UTeM project to build the first CST model in South East Asia and was aimed to develop an azimuth-elevationmode-based template using MATLAB programming for the calculation of the heliostat position with respect to the heat absorber mounted at the top of the CST. This template will serve as the calculation platform to control the movement of the heliostat using a two-axis motion system so that the sun light will be redirected perfectly to the absorber all day long. Since the heliostat normal vector depends on sun position vector, both vectors were calculated by the program and were set as the output of the program. The input from the user will be the Cartesian coordinate of the heliostat and absorber by taking the absorber tower frontal surface and its base as the origin and also the date. The result will be in vector form and will change automatically according to the Sun movement. These values will be programmed in the micro controller which will control the motion system of the heliostat, which will be done by the Control Department of UTeM. The program´s functionality was proved via several verifications and its accuracy which is 0.0005 as stated and verified via comparison with analytical calculations. From the verifications, it can be seen that difference of the numerical and analytical results varied from 0.0000 to 0.0005 which validates the statement of minimum accuracy of the numerical calculated results is 5/10,000

Modelling And Simulation Of A Wind Turbine With Doubly Fed Induction Generator In Full Load Operation

The paper focuses on modelling and simulation of a 5 MW wind turbine with doubly fed induction generator (DFIG) in full load operation. The wind turbine model is described mathematically and presented in simulation blocks. Through a computer simulation, the wind turbine behavior in full load operation is investigated. A speed controller is used to adjust the pitch angle of a rotor blade in high wind speed to limit the wind energy captured by the turbine to the nominal power value. By adjusting the pitch angle to 18.26° at wind speed 20 m/s, the wind turbine is protected from mechanical damage due to torque and power limitation. The simulation results obtained can be used as references for future optimization for the variable speed wind turbine operation

Modeling and simulation of doubly fed induction generator for wind turbine

The construction of modern wind turbine is costly, complex and risky. In this paper, modeling and simulation of doubly fed induction generator (DFIG) for wind turbine is presented to investigate the dynamic behavior of the system. The behavior of the system is described in mathematical equations, modeled and simulated in MATLAB/Simulink using field orientation principle. Simulation results are presented in two operation modes namely below and above synchronous speed. Measurement obtained from 5 MW wind turbine confirmed the theoretical result. The created modeled can be used to simulate the behavior of DFIG for wind turbine inexpensively, efficiently and safely

Fully Automatic Solar Powered Oil-Water Separation System For Grease Trap Controlled By Arduino: A Conceptual Design

Pipeline clogging in food premises frequently emerges, particularly in small range restaurants. Fat, oil and grease (FOG) disposed from food premises becoming root cause for this issue and pollute drainage system. The aimed of this project was to remove the FOG from wastewater and with automatic oil disposal system using renewable energy. Power input system was improved by designing and developing the solar tracker system for automatic oil disposal grease trap controlled by Arduino and light radiation sensor. The solar tracker was designed based on engineering design methodologies including the survey, house of quality (HOQ), morphological chart and pugh method to ensure the engineering criteria achieved with the concern of customers satisfaction. Light radiation sensor was used to improve the efficiency of solar tracker by detecting the location of sun and Arduino will give a command to the motor based on a signal received from a light radiation sensor. Dual axis solar panel with light radiation sensor gave significant reduction in terms of time consumption used to absorb energy from the sun with average amount of voltage of approximately 1.82 volt compared to fixed solar panel which has average amount of voltage of approximately 1.35 volt. The newly designed dual axis solar tracker also has advantage on flexibility where it can be put at different angle and places

Feasibility Study Of A Grid Tied PV System For Universiti Teknikal Malaysia Melaka

Universiti Teknikal Malaysia Melaka (UTeM) has to consider renewable energy as part of electricity generation to save cost of electricity. Photovoltaic (PV) system hereof is appropriate because it is reliable for sunny location like Melaka. Therefore, the purpose of this research is to carry out feasibility study of providing electricity from PV system for UTeM. The proposed system comprises of grid tied PV and battery storage. The techno-economic analysis of the proposed system was performed using Hybrid Optimization of Multiple Energy Resources (HOMER) software. The optimal size and the cost-effective configurations of the system were identified. From the simulation result, the optimal grid tied PV system has the minimum net present cost (NPC) and economic benefits over base system (utility grid) with 16.6% internal rate of return (IRR) and 5.7 years payback period. The results obtained can be used as references for the stakeholders and policy makers in developing grid tied PV system for university campuse

A Prototype Development Of Anti-Hunchback Device

The spine is a part of our body which is very important but often neglected.Sometimes because of our own mistakes,the damage or injury in the spine will cause a variety of problems that have to be borne.Therefore,the objective of this research is to develop a device that is able to warn by triggering people about the position of the spine body if the hunch exceed the critical level by vibration.This device is environmentally friendly and small in size.In the process of making 'Anti Hunchback Device’,observations have been made against those who tend towards the hunchback problems.Taking data from the user by questionnaire and using product design and development method to produce this device.This device will be a useful solution to address the problem of bone bent at an early stage of the spine disease,restoring a healthy posture health care for the long term and also save money from health spending for the foreseeable future

The Comparison Study of Handgrip Pressure on Steering Wheel National Cars / Mohd Hidayat Ab Rahman ...[et al.]

The steering wheel is ergonomically designed to provide optimal comfort to the drivers while grip the steering wheel, especially on the long journey. There are significant design differences between the steering wheel car models. Therefore, the objective of this research are to analyze the data of handgrip pressure towards national cars which is Proton and Perodua. The experiment will be performed by using type 2 (two) cars, Proton Saga and Perodua Myvi. Tekscan Grip System is a system that will be used to perform this analysis. Data of handgrip pressure are collected during driving when the device are installed and connect to the respondents. Selection of the road for this experiment will start at 92.1 KM intersection traffic lights, entering North-South Highway, and will end at Tangkak Toll Exit. During the experiment, all volunteers need to maintain speed in the range of 80-100km / h and most of the time, they have to drive in the left lane unless overtaking other vehicles. Distance from beginning to end is about 68.8km and the time taken is about 30 minutes. Drivers will be driving with the hands on the steering wheel 9 and 3 because it is the safest position to hold the steering wheel. The finding from this study will give a better insight on the effect of steering wheel design to the grip pressure of the driver

Conceptual design approach and ergonomics analysis of fire resistant purpose shield

Shield was used as protection from danger centuries ago. Until this moment, there was still no shield available for firefighting purpose in safe and rescue operation. This factor has put a limit to firefighters, causing death to many victims who were in critical and dangerous situation. In this project, conceptual design will be proposed aimed to protect firefighters against fire and heat. The project was based on the existing design of Federal Reserve Unit (FRU) shield and innovated by adding the application of resisting fire. The methodology used are customer survey to fire fighters, house of quality in defining customers’ needs, morphological chart in defining concepts, Rula-analysis in measuring ergonomic score and Pugh method for selection of best design. Carbon fibre was selected as the main material for the shield because it has a very low material density of approximately 1.75 g/cm3 and very high melting point of approximately 3500 °C. In Rula-Analysis, the ergonomics final score was 3. Results show that carbon fibre is appropriate for lightweight and fireresistant shield. Ergonomics score of 3 for standing and kneeing position while holding shield is acceptable and further investigation can be recommended