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Radial Distribution System (RDS) is the most widely used system for power distribution because it has a simple architecture and low investment cost. Due to the addition of nonlinear loads, some challenges are raised such as power losses, and the spread of harmonics. The increasing harmonic distortion will result in shorter insulation lifetime, higher temperature and also device malfunction. These...
In this study, the problems are how to determine the locations and the size of capacitors in the buses of radial distribution system. The proposed method uses loss sensitivity factors (LSF) to identify the buses requiring compensation and then an accelerated particle swarm optimization (APSO) algorithm is used to determine the sizes of the capacitors to be installed. The proposed method is tested...
This paper presents design and experimental studies of vending machine for office stationery Transactions. The advantage of the proposed vending machine i.e. Transaction can be done by using short message system (SMS), all transaction can be monitored online by owner by using Android, the vending machine has feature early warning system (EWS) when system in trouble, and it also equipped with battery...
This paper will present an implementation of Extreme Learning Machine (ELM) in Prototype of Hand Typist Robot (HTR). HTR is Typist Robot which is designed for quadriplegic people. HTR consists of two robotic arms with three dynamixel AX-12 that mounted on each arm. It is mean that each arm has 3 DOF. To operate HTR, user has to equipped with compass sensor (CMPS10), installed on the part of body that...
In this paper, a new methodology combined with Harmonic Loss Sensitivity Factor (HLSF) and Direct Search Algorithm (DSA) has been proposed for optimal placement of capacitor on unbalanced and harmonically distorted three phase radial distribution system. In other words, an aggregate harmonic loss sensitivity factor, i.e., including fundamental component is used to decide the prospective optimal locations...
Harmonic that occurs in electrical power distribution system can disrupt and even decrease the quality of power services, so that reduction or removal of those harmonic are needed to be done. Wavelet transformation can give resolution of both frequency and time at the same time, this capability is often called Multi Resolution Analysis (MRA). Wavelet transform is applied in order to remove those harmonic...
Nowadays, the research in robotics field is growing. One of the studies in robotics is the control method of the robotic arm movement. In this research, a 3 DOF arm drawing robot was built. An inverse kinematic models of the robot arm is made using artificial neural network method. Artificial neural network model was implemented in a GUI application. The ANN model can work in real-time to control...
Finding out about the damage of the induction motor particularly in the rotor bar is essential to ensure the continuity of the manufacturing process and to reduce the high cost of breakdown maintenance. In the past decades, the difficulty level to find fault in rotor bars has attracted many researcher to develop the solving method. Therefore, this work presents an alternative to discover fault on...
The productivity of oyster mushroom cultivation in low-lying areas are still not optimal. This is due to the cultivation of oyster mushrooms needs ideal temperature and humidity (temperature 22–28 ° C with a humidity of 60% – 80%), while nowadays temperature and humidity preservation process is done in a conventional manner. Given these problems, the researchers gave the solution by creating a tool...
Electrical power demand increases rapidly due to the development of technology. In the contrary, the availability of non-renewable energy sources surely decreases. This problem will impact on the national energy security. To meet the need of a large electric power, it is required to develop a large area small scales of distributed generations. Distributed generations utilize renewable energy sources,...
The basic purpose of mobile robot motion planning (MRMP) is discover the shortest path safely from beginning to the end position in the environment without crash some obstacles. In this paper, we proposed a combined method between Voronoi diagram (VD) and the modified Ant Colony Optimization (M-ACO) algorithm for MRMP. The Voronoi diagram generate edges and vertices in the obstacles-filled space,...
One of the disturbance types in the power system is the occurrence of fluctuations in demand for power on the load side. Changes in power demand can cause oscillations inside the generator. One of the additional equipment that is used to damp the oscillation is power system stabilizer. In this paper, power system stabilizer parameter is tuned using random drift particle swarm optimization algorithm...
Renewable energy sources and batteries are the important components to supply power on the stand-alone microgrid. Optimization of the stand-alone microgrid is needed to get the lowest energy generation const. The saving generation cost can be Renewable energy sources and batteries is an important component of the power supply stand-alone microgrid. Optimization of the stand-alone microgrid is needed...
Most of rural areas in Indonesia, especially outside Java islands, are still undeveloped and lacked household electric power. On the other hand, grid extension isn't a suitable solution for them because of the general layout in Indonesia is an archipelago state and the price of grid exension is high. Therefore, we must find another solution for electricity generation which is suitable for Indonesia...
The Critical Clearing Time (CCT) is a key issue for Transient Stability Assessment (TSA) in electrical power system operation, security, and maintenance. However, there are some difficulties in obtaining the CCT, which include the accuracy, fast computation, and robustness for TSA online. Therefore, obtaining the CCT is still an interesting topic for investigation. This paper proposes a new technique...
This paper presents the steady state performance of active and reactive power flow between grid and inverter as voltage controller through a link inductor in distributed generating system. The inverter is synchronized and connected to the network through a link inductor that connecting the output terminal of inverter with the grid. In this paper, the design value of a link inductor between inverter...
This paper proposes an approach for optimal power flow considering several contingency states. Initially, contingency selection is conducted to measure how much a specific contingency may affect the operation cost. Then, some severe contingencies are incorporated into optimal power flow problem. All considered states, normal and contingency states, are simulated simultaneously. Thus, if contingency...
This paper proposes a placement technique of wind turbines to optimize the total output power and cost in a wind farm using firefly algorithm. The research considered the wake effect of wind turbines and was run for 3 cases: constant wind speed and constant wind direction, constant wind speed and variable wind direction, variable wind speed and variable wind direction. It focused on finding the best...
Objective of research is to analyze the influence of the photovoltaic (PV) generator installation to power quality on distribution network. There are two models of load distribution network, namely industrial and residential costumers distribution network. Reseach show that the value of bus voltage THD on distribution network of industrial and residential customers are still under of voltage THD limit...
This paper deals with dynamic optimal power flow (DOPF) considering geothermal power plant under take or pay (TOP) contract. As located in ring of fire, Indonesia has high potential of geothermal resources. Therefore, geothermal power plant becomes promising solution of power shortage in Indonesia. However, it takes high investment cost to develop geothermal power plant. In order to attract the investors...
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