Enlarging solar power plants are increasing. This increase is to reduce compatibility with the use of fossil fuel electricity. Utilization of solar power plants is mostly used for street lighting and home industries. Solar power plants must rely on solar irradiation received on solar panels. The output power is also changed by large values from external factors such as partial shading. Partial shading is a condition that is closed / blocked by some cells in the solar panel. The application of partial shading is mostly only used with simulation software. However, in this final project research is carried out the implementation of partial shading and analysis to determine the effect on the output power that occurs in solar panels in actual environmental conditions. The application is made to know the output power during normal and partial shading conditions and to know the partial effect on the solar panel output power. The maximum value of the power produced in solar panels is 298.50 W. The maximum power value that can be obtained when a partial shade occurs is 141.13 W and the partial shade that occurs in the solar panel causes the power to increase under normal conditions.

Abstract. This study presents a space vector pulse width modulation (SVPWM) method. Switching time for SVPWM two level is used to generate a sinusoidal waveform from the inverter. This waveform using as input for the induction motor. Usually, we use the internal circle to generate sinusoidal method. However, from the calculation, we can get two different equations, for the internal circle in hexagon and external circle for the hexagon. Comparison between voltage vector in the internal and external circle of hexagon using THD (Total Harmonic Distortion) value for each circle.

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The image reconstruction algorithm of diffuse optical tomography (DOT) is based on the diffusion equation and involves both the forward problem and inverse solution. The forward problem solves the diffusion equation using the finite element method for calculating the transmitted light distribution under the condition of presumed light source and optical coefficient. The inverse solution reconstructs the optical property coefficient distribution using Newton's method. The work within this study develops an image reconstruction algorithm for frequency-domain DOT. A numerical simulations approach to light propagation in the tissue is conducted, while the optical property is reconstructed employing data around the boundary. We implement different designated simulation cases, including different contrast ratios of absorption and reduced scattering coefficient of inclusion with respect to the background used for verifying the results of the forward problem and the developed reconstruction algorithm. Reconstruction results indicate that the quality of reconstructed images can be effective for screening breast cancer.

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