Teaching the Self-Excited Induction Generator Using Matlab

2003 ◽  
Vol 40 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Yaser N. Anagreh ◽  
Imadden M. Al-Refae'e

This paper presents an attractive approach for teaching the self-excited induction generator. Three operating conditions of the generator are mathematically modeled and then simulated using conventional Matlab commands. Active windows with these models are created using Matlab's Graphical User Interface capability. An example is given to demonstrate the usefulness of the developed tool.

2021 ◽  
Vol 21 (1) ◽  
pp. 8-14
Author(s):  
Ihsan N. Jawad ◽  
Qais A. Rishack ◽  
Hussien S. Sultan

In the present research, a Matlab program with a graphical user interface (GUI) has been established for studying the performance of a solar tower power plant (STPP). The program gives the ability for predicting the performance of STPP for different tower dimensions, ambient operating conditions and locations. The program is based on the solution of a mathematical model derived from the heat and mass balance for the tower components. The GUI program inputs are; tower dimensions, solar radiation, ambient temperature, pressure, wind velocity, turbine efficiency, emissivity and absorptivity for collector and ground and thermal conductivity and thickness for ground. However, the GUI program outputs are; temperature and pressure differences across the collector and tower, velocity in the tower, density of air in collector outlet, mass flowrate of air, efficiency for collector and tower, the overall efficiency and output power of STPP. The effect of the geometrical dimensions of STPP and some climatic variables on the plant performance was also studied. The results show that the output power increases with increasing the collector diameter, chimney diameter and solar radiation by an increasing of 0.282 kW/m, 0.204 kW/m and 0.046 kW/(W/m2) respectively.


Author(s):  
Nur Ashida Salim ◽  
Hasmaini Mohamad ◽  
Zuhaila Mat Yasin ◽  
Nur Fadilah Ab Aziz ◽  
Nur Azzammudin Rahmat

<span>Transmission line is one of the important elements in the process of power transfer from the source of generation to the consumer. In order to analyze the performance of a transmission line, it has to be represented by an equivalent model with suitable circuit parameters at a per phase basis. The line models are used to measure voltages, currents and the amount of power flow depending on the line length. Transmission line performance is determined by the voltage regulation and its efficiency under their normal operating conditions. In this study, a systematic approach was developed in order to assists the lecturers in teaching this important topic to the students despite so many complicated mathematical equations involved in the calculation. With the aid of Graphical User Interface (GUI), the performance of transmission line can be determined and monitored due to the change of line parameters. The results obtained could assist the lecturers in delivering the concept of engineering in a more systematic approach. On top of that, it could also assist the power system utility in planning the transmission line that needed to be installed in the system.</span>


Rhetorik ◽  
2017 ◽  
Vol 36 (1) ◽  
Author(s):  
Wolfgang Hagen

AbstractThe essay will discuss how PowerPoint historically emerged (at the turn of the 1980ies) from the mission statement towards the (back then brand new) Graphical User Interface that would provide a new machine/man metaphor called »Private Computer«. Therein was expressed, as the lecture argues, the self-presentation of a locally bound and fast growing corporate economic culture called »Silicon Valley« represented in its own diagrammatical schemes. The immanent rhetoric of the software - developed under the (much more appropriate) name »Presenter« - unwillingly disrupts the digital brilliance of the computer interface in reinforcing it at the same time - a Silicon Valley style of making progress. However, the disclosure of PowerPoint rhetorics as classical formulaic rhetoric shows the boundaries in which the program can be of only limited use. This mixture between a classical old rhetorical style and the build-in-hope of a fantastical new future might explain why a quarter of a century and ten software versions later Powerpoint has become so overwhelmingly popular (used on more than one billion computers), while at the same time mutated into one of the most scandalous bugbears of the digital.


1997 ◽  
Vol 117 (1) ◽  
pp. 66-72
Author(s):  
Tadashi Fukami ◽  
Yuichi Kaburaki ◽  
Toshio Miyamoto

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