Analyzing Variables By Using Second-Order Model Of Response Surface Methodology (RSM)

Mohd Arif, Abu Hassan (2012) Analyzing Variables By Using Second-Order Model Of Response Surface Methodology (RSM). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Response Surface Methodology (RSM) has been used to minimize the conditions of Total Harmonic Distortion (THD) produced in leakage current when the effect factors are tested on new insulation material. A factorial design used to determine the number of eight samples of new insulator to be tested. THD is defined as a dependent variable in leakage current (LC) which is depend on three independent variables which are water flow rate (f), water conductivity (δ), and high voltage applied (V) to the sample. A fitting second-order model with second-degree approximate polynomial is employed to generate the fitted response surface of THD. The fitting model of THD is computed by using Design Expert software. The independent variables are varied such as f 3 ml/s and 6 ml/s, δ at 300 Ω/cm and 400 Ω/cm and lastly V at 3 kV and 4 kV. The expected optimized condition is about to locate the minimum THD response surface and the contribution of factors’ values of water flow rate, water conductivity and high voltage stress which produce the minimum THD. From the fitted model, the best THD value is 46.4538% when the all factors (V, C and F) were at low level of high voltage stress = 3kV, conductivity of water = 300Ω/cm and flow rate of water = 3ml/s.

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