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TELKOMNIKA Indonesian Journal of Electrical Engineering
ISSN : 23024046     EISSN : 2087278X     DOI : -
TELKOMNIKA Indonesian Journal of Electrical Engineering (ISSN: 2302-4046, e-ISSN: 2087-278X, a Ei Compendex Indexed journal) is a monthly peer reviewed International Journal in English. The aim of this journal is to publish high-quality articles dedicated to all aspects of the latest outstanding developments in the field of electrical engineering. Its scope encompasses the applications of Telecommunication and Information Technology, Applied Computing and Computer, Instrumentation and Control, Electrical (Power), and Electronics Engineering.
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Articles 2,597 Documents
PSO based Optimal Power Flow with Hybrid Distributed Generators and UPFC Ravi, Lakshmi; Bharathi dasan, S.G.
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 3: July 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i3.601

Abstract

Distributed Generation (DG) is a small source of electric power conversion from nonconventionalenergy sources and Hybrid DGs is often the most cost-effective and reliable way toproduce power. Optimal Power flow (OPF) study is conducted on a power system to achieve one of the following objectives: cost/loss minimization or Available transfer capability (ATC)calculation in a deregulated environment. The optimality of control variables would definitely change with respect to the location, quantity and combination of power injection by DGs. On the other hand, FACTS controllers are effective in utilizing the existing transmission network whichis very important especially in a deregulated system. Unified Power flow controller (UPFC), a second generation FACTS controller, is well known for minimizing the cost of generation/losses with a good voltage profile as well as for ATC improvement. This paper conducts a detailed OPF study on a 9 bus system [7] for the above mentioned three objectives, with DGs and UPFC. To solve the OPF problem, Particle Swarm Optimization (PSO), a non conventional technique is used.
Modeling of Maximum Power Point Tracking Controller for Solar Power System Soetedjo, Aryuanto
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 3: July 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i3.602

Abstract

In this paper, a Maximum Power Point Tracking (MPPT) controller for solar power system is modeled using MATLAB Simulink. The model consists of PV module, buck converter, and MPPT controller. The contribution of the work is in the modeling of buck converter that allowing the input voltage of the converter, i.e. output voltage of PV is changed by varying the duty cycle, so that the maximum power point could be tracked when the environmental changes. The simulation results show that the developed model performs well in tracking the maximum power point (MPP) of the PV module using Perturb and Observe (P&O) Algorithm.
Modeling and Control PV-Wind Hybrid System Based On Fuzzy Logic Control Technique M. Atia, Doaa
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 3: July 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i3.603

Abstract

As energy demands around the world increase, the need for a renewable energy sources that will not harm the environment is increased. The overall objective of renewable energy systems is to obtain electricity that is cost competitive and even advantageous with respect to other energy sources. The optimal design of the renewable energy system can significantly improve the economical and technical performance of power supply. This paper presents the power management control using fuzzy logic control technique. Also, a complete mathematical modeling and MATLAB SIMULINK model for the proposed the electrical part of an aquaculture system is implemented to track the system performance. The simulation results show that, the feasibility of control technique.
Architecture and Fault Identification of Wide-area Protection System Li, Zhenxing; Yin, Xianggen; Zhang, Zhe; Wang, Yuxue
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 3: July 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i3.604

Abstract

Wide-area protection system (WAPS) is widely studied for the purpose of improvng the performance of conventional backup protection. In this paper, the system architecture of WAPS is proposed and its key technologies are discussed in view of engineering projects. So a mixed structure—centralized-distributed structure which is more suitable for WAPS in limited power grid region, is obtained based on the advantages of the centralized structure and distributed structure. Furthermore, regional distance protection algorithm was taken as an example to illustrate the functions of the constituent units. Faulted components can be detected based on multi-source imformation fuse in the algorithm. And the algorithm cannot only improve the selectivity, the rapidity, and the reliability of relaying protection but also has high fault tolerant capability. A simulation of 220 kV grid systems in Easter Hubei province shows the effectiveness of the wide-area protection system presented by this paper.
Ventilation Structure Improvement of Induction Motor Using Multiphysics Simulations Zhang, Yujiao; Huang, Xiongfeng; Huang, Tao; Ruan, Jiangjun; Wu, Xiaowen
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 3: July 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i3.605

Abstract

Temperature rise analysis has significant impact in the design of air-cooled asynchronous induction motor. However, the affection cannot be accurately evaluated by using traditional empirical curves method due to the complexity of the inductor architecture. Considering Joule’s losses in stator windings and the induced eddy current in squirrel cages, and heat dissipation by air convection and solid conduction, in this paper a 3-D coupled-field finite-element method (FEM) is investigated to demonstrate the temperature distribution. The Joule’s losses calculated by 3-D eddy- current field analysis are used as the input for the thermal field analysis, which is deeply dependent on accurate air fluid field analysis. A novel multi-component fluid model is employed to deal with the influence of rotor rotation upon the air convection. The simulation results show the fatal influence of the ventilation structure and the effectiveness of the proposed cooling improvement way.  
Congestion Relief of Contingent Power Network with Evolutionary Optimization Algorithm Chanda, Sandip; De, Abhinandan
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 1: March 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i1.647

Abstract

This paper presents a differential evolution optimization technique based methodology for congestion management cost optimization of contingent power networks. In Deregulated systems, line congestion apart from causing stability problems can increase the cost of electricity. Restraining line flow to a particular level of congestion is quite imperative from stability as well as economy point of view. Employing ‘Congestion Sensitivity Index’ proposed in this paper, the algorithm proposed can be adopted for selecting the congested lines in a power networks and then to search for a congestion constrained optimal generation schedule at the cost of a minimum ‘congestion management charge’ without any load curtailment and installation of FACTS devices. It has been depicted that the methodology on application can provide better operating conditions in terms of improvement of bus voltage and loss profile of the system. The efficiency of the proposed methodology has been tested on an IEEE 30 bus benchmark system and the results look promising.
Dynamic Stability Enhancement of Power Systems Using Neural-Network Controlled Static-Compensator Harikrishna, D; Srikanth, N V
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 1: March 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i1.648

Abstract

This paper aims at enhancement of dynamic stability of power systems using artificial neural network (ANN) controlled static VAR compensator (SVC). SVC is proven the fact that it improves the dynamic stability of power systems apart from reactive power compensation; it has multiple roles in the operation of power systems. The auxiliary control signals to SVC play a very important role in mitigating the rotor electro-mechanical low frequency oscillations. Artificial neural network based controller is designed using the generator speed deviation, as a modulated signal to SVC, to generate the desired damping, is proposed in this paper. The ANN is trained using conventional controlled data and hence replaces the conventional controller. The ANN controlled SVC is used to improve the dynamic performance of power system by reducing the steady-state error and for its fast settling. The simulations are carried out for multi-machine power system (MMPS) at different operating conditions.
Operation of a Fuzzy Controlled Half-Bridge DC-Converter as a Welding Current-Source Malekjamshidi, Zahra; Jafari, Mohammad; Mahmoodi, Kourosh
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 1: March 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i1.649

Abstract

In This paper a new Fuzzy Controlled Welding current source is introduced and the results of the new control method are explained. The Fuzzy controller is applied to the welding machine to improve some problems of welding process. The new intelligent controller guaranties a constant current during welding to improve welding quality. It also provides some features such as hot-start and anti-stuck function and a standby mode for energy saving. The effectiveness of this intelligent welding machine was proven by the experimental results and durable test.  The results show that designed FCWM (Fuzzy Controlled Welding Machine) can be used in mobile welding industries.
Five-Level Common-Emitter Inverter Using Reverse-Blocking IGBTs Suroso, NFN; Noguchi, Toshihiko
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 1: March 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i1.650

Abstract

In a high switching frequency operation of current-source inverter (CSI), a conventional way to obtain unidirectional power switches is by connecting discrete diodes in series with the high speed power switches, i.e. power MOSFETs or IGBTs. However, these discrete diodes will cause extra losses to the power converter. This paper presents experimental test results of high switching frequency five-level common-emitter CSI using the emerging unidirectional power switches, i.e. reverse blocking (RB)-IGBTs. Experimental tests were also conducted to compare the performance between power MOSFETs in series with the discrete diodes, and the RB-IGBTs having inherent reverse blocking capability. The results show that using RB-IGBTs, the efficiency of the power converter will increase. However, it is also confirmed that the recently available RB-IGBTs have slow reverse recovery current than the discrete fast-recovery diodes connected in series with power MOSFETs.
Demand Shifting Bidding in a Hybrid System with Volatile Wind Power Generation Agrawal, D.K.; Patidar, N.P.; Nema, R.K.
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol 10, No 1: March 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/telkomnika.v10i1.651

Abstract

In this paper price responsive demand shifting bidding mechanism is discussed as an alternative solution to deal with intermittency in wind generation. This paper proposes a formulation of social welfare equation with price responsive demand shifting bidding and economic emission dispatch with emphasis on integration of wind power. The analysis is based on the IEEE 30 bus test system generation data, with conventional and wind generation plant over a period of 24 hours. It has been demonstrated that the proposed approach leads to reduction in emission as well deal with intermittency in wind generation.

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