Dodiek Ika Candra
aResearch Centre for Electrical Power & Mechatronics, Indonesian Institute of Sciences, Kampus LIPI, Jl. Sangkuriang Gd. 20, Bandung 40135

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POWER CURVE PREDICTION OF SMALL SCALE WIND TURBINE REFERRING TO THE GENERATOR CHARACTERISTIC Irasari, Pudji; Candra, Dodiek Ika
Teknologi Indonesia Vol 36, No 3 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i3.207

Abstract

This paper discusses power curve prediction of small scale wind turbine for a battery charger. The proposed prediction method does not require the data of wind speed but refers to the generator characteristic instead. The method is based on wind turbine power equation initiated with determining the value of Cp, then establishes the powerwind speed and shaft speedwind speed correlations. For simplicity, this method ignores aerodynamic factor of the system. The simulation result in the form of wind turbine power curve (power versus wind speed graph) is then compared with the characteristics of commercial wind turbine and demonstrates rational values of cut-in and cut-out wind speed.
Optimization for Biogas Power Plants using Automatic Control of Gas Pressures Candra, Dodiek Ika; Tamayo, Camilo Andreas Wilches
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 1 (2013)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (404.64 KB) | DOI: 10.14203/j.mev.2013.v4.9-16

Abstract

In many cases, gas storages on biogas power plants are not used optimally to store gas as much as their capacity. The digester is sometimes overload to store gas and the controller cannot deliver gas to other storage. Consequently, gas is often released from digester to avoid over pressure. At the end, biogas power plant has less efficiency. Hence, a mechanism to control gas pressure to make different pressure between its storages is required. Fans were used to manipulate the most majority system pressures on a biogas power plant using frequency converters. Measurements, simulations, and experiments were conducted to create a new system on a biogas power plant. A controller, Programmable Logic Controller was used to control the entire system pressure using Proportional-Integral-Derivative algorithm. When the gas pressures are not in the allowable range of pressure, then the controller changes the fans’ frequency to the desired conditions. As a result, gas moves to another storage and system pressures are in the allowable range.