This research proposes technical performance evaluation and economic decence for the combination of harmonic correction devices in Industry. Currently an electronic device is popularly applied in power network. Although it is a higher performance device than the existing device it still causes the power quality issues and then network failure. Especially harmonic disturbance in the network it is a harmonic source that generates harmonic current into the network. Many types and solutions are available in the present time therefore the suitable and optimal financial solution must be considered. A network model for the analysis of harmonic correction devices suitable solutions and optimal financial has been established in the simulation software that bases on the power and Break Even Point (BEP) equations. The results of analysis shown that the performance of harmonic correction devices suitable solution and BEP of investment in match to the using of a detuned filter bank and an active harmonic filter (case 8) thus these information will be valued for the end-user.

Electricity Generating Authority of Thailand (EGAT) encountered problems voltage swell from the changes of power system configuration high-voltage 115 kV substation name Lopburi2 to radial. Control Center closed capacitor bank caused the steel industry electric power plants and renewable energy solar tripped themselves out. As a result EGAT loosed of power produced of solar power plants. It also affected confidence in the systems power consumption. EGAT’s necessary to learn from this event. This research was simulation power system modeling of “High Voltage Substation Lopburi2” and grid connection both the system EGAT and PEA with EMTDC-PSCAD for analysis of the voltage swell caused by close capacitor bank at “Lopburi2” substation compared with actual events then calculated the voltage swell occurred at high voltage station linkage. Finally this research presents a method of reduction of their impact of close capacitor bank at “Loburi2” to avoid the voltage swell in the future.

This research presents the studying of short circuit in distribution system that affect to critical equipment voltage sag and overvoltage while short circuit event. Lead into the quality of electric user. Effect on economics damaged Distribution system voltage level 22kV of The Provincial Electricity Authority. It is the analysis model by computer program. The event of short circuit set in a many distribution systems. The analysis result Magnitude of voltage while short circuit bring to assessment voltage sag and overvoltage from average voltage of the repeat event. Then set boundary of voltage at load point in a many. The experiment shows the problem of the quality of electric be affect to critical equipment less than load point close connection with substation.

The objective of this project Photocopying Document Management System managed photocopying requirements of employees in Faculty of science. This system can used to track and manage photocopying tasks and store photocopying requirements. Moreover the system can summarize total number of paper usage and calculate statistic of user’s satisfaction. The Photocopy Document Management System is a web application which is developed by using PHP and MySQL. The overall of Photocopying Document Management System user’s satisfaction is at the greatest level which is the total average at 4.79 and the standard deviation at 0.12. the system can perform all of expectations.

Project name Scientific Equipment and Service System on WebApplication purpose 1. To develop a tool booking system 2. To evaluate the efficiency of the tool reservation system. 3. To evaluate the satisfaction of the tool reservation system The system has been developed in the form of a web application. To create a database system for storing information of various tools booking information and other information Systematically With the access rights of the system users in 3 parts: the administrator Membership section And parts of general users The tools used for system development are PHP and My SQL. For evaluating the satisfaction of use Scientific Equipment and Service System on WebApplication. The results showed that The overall satisfaction level per system is at a good level. Average total with 4.46. Found that the work efficiency was the first satisfaction With a satisfactory level of satisfaction With an average of 4.51. Secondly is the design of the user system With a high level of satisfaction With an average of 4.47. Secondly the selection of technology in system development has a good level of satisfaction. With a total average of 4.41. In conclusion Scientific Equipment and Service System on WebApplication Can be applied effectively