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The problems arising in loop electrical network system is a relay setting that follows changes in the system such as power source operation, regular maintenance and damage to powers source. To obtain an adaptive relay which is capable of following the changes in the network system, this paper is proposes the modeling of the coordination of the power system network with the cascade forward neural network...
One major concern in using over current relays (OCRs) is their coordination in power system protection to decrease the pressure of electrical equipment and avoid mal-trip in the primary and backup relays. The issue has recently become more challenging with the increasing use of distributed generation (DG). This study proposes the use of firefly algorithm (FA) to achieve an optimised coordination of...
Nowadays, the civil, business, and industrial electrical power loads in Indonesia are growth rapidly. The main growth is in non-linear load as source of current harmonic which causes serious problem in power quality and safety of electric power system. To solve the problem, power quality monitoring system which is integrated with more effective measurement, control, communication, and supervision...
The main problem which often occurs in wind turbine systems is getting the maximum power output and maintaining the DC link voltage at a constant value through wind fluctuation. This paper proposed to maintain the DC link voltage during stand-alone condition, it takes a battery as energy storage with a bidirectional buck-boost converter to regulate charging and discharging mode, alternately. Control...
Intelligent-based protective relays in the power system is currently growing very rapidly with the use of embedded systems and artificial intelligence algorithms. Overcurrent relays operated based on the standard characteristic curve will move toward digital overcurrent relay (DOCR) using a flexible characteristic curve based on the user settings. DOCR with the standard characteristic curve cannot...
Detection of power quality disturbance is most essential to ensure the good Power Quality (PQ). The power disturbance signal will reduce the reliability of power system and create some disadvantage on operation process. Aging of electrical device, incorrect measurement, devices malfunction are the consequence of this condition. The characteristic of power disturbance signals are non-stationary and...
Nowadays, wind energy, as a source of electrical energy, are growing rapidly to substitute fossil energy. The power generated wind turbine is fluctuating that is influenced by wind speed so that it takes the appropriate controlling to get the maximum energy and the constant power for grid. This paper presents control for variable speed permanent magnet synchronous generator (PMSG) wind turbine that...
To increase efficiency of wind power system, the system have to work at maximum power. This paper proposes a new modification of the algorithms firefly by updating the coefficient p and neglected α and γ to get the maximum power from the wind turbines use a permanent magnet synchronous generator. The method differs from the standard firefly just ignore α and γ to accelerate convergence alone. The...
The selection of site wind farm is an important element in building a wind power generation to get a site that is capable of produce maximum energy, economic and environmental agreeable. It is obtained if proposed alternative sites has continuous wind resources, access to the grid, good topography, land costs are cheap, reduce noise blade and available road access. The site proposed of study is Sukomoro,...
A radial distribution system have different characteristic when it is installed with distributed generation, especially in protection coordination. However, Over current protection in distribution system influenced from different in fault current when distribution system connected with DG. Therefore, this paper presents optimization based adaptive coordination protection of over current relays using...
The overcurrent relays (OCRs) as main protective devices have been most commonly used to protect radial distribution system and must set correctly when load, generation-level or system-topology changes. For digital OCRs based on microprocessor, adaptive setting coordination stored at the memory. This paper demonstrates the technique of bioinformatics to determine the correct setting of available OCRs...
Create an accurate model with over-current relays (OCRs) play an important role in the coordination of power system protection. Modeling of the OCR using methods like the direct data storage and software models gave only approximate models. Moreover, modeling based on mathematical models is not appropriate to deal with ill-defined and uncertain systems. Therefore, in this paper proposes modeling of...
Overcurrent relays (OCRs) play an important role in the protection component that requires high reliability to maintain high security for power systems. Modeling of the OCRcurve using methods like the direct data storage and curve fitting gave only approximate models. Therefore, in this paper proposes modeling of OCRs using Levenberg-Marquardt backpropagation (LMBP). An implementation of OCR in the...
This paper proposes the combination of firefly and P&O algorithm to get both of its benefit. Simplified firefly algorithm used for escaping partial shading multi peaks condition due to Partial Shading Condition (PSC). When it goes yet to converge, the algorithm used is switched to faster modified P&O algorithm. This proposed algorithm is to obtain the optimal solution for Maximum Power-Point...
Today, Transformer monitoring is urgently needed. This come from the reality that Indonesian Electrical Company could not know the condition of the transformer which was installed. The transformer is known damaged after something happen with the transformer. The Indonesian electrical company does some maintenance for the transformer, but this maintenance is only for checking the transformer is working...
In this paper, modeling of overcurrent relay (OCR) curves using adaptive neuro fuzzy inference system (ANFIS) are proposed. The accurate models of OCR curve with inverse time relay characteristics have an important role for protection coordination of power system. Models of OCR curve are appropriate with IEC standard. This model implements of microcontroller AT mega 128 as digital relay and personal...
This paper proposes new Simplified Firefly Algorithm (SFA) with an updated β coefficient to maximum power point tracking (MPPT) of photovoltaic system under partial shading condition. The different from standard firefly algorithm is neglected a and y coefficients to simplify an algorithm. The other new feature is updated β coefficient for each iteration step in order to achieve faster convergence...
This paper proposed a new method for over current relays (OCs) problem calculation. The proposed method for over current relays problems calculation is known as the interval type 2 fuzzy logic (IT2FL). Ip and TMS of over current relays were used as IT2FL input, while the IT2FL output as operating time of over current relays. The aim of IT2FL application use was to determine the accuracy of the over...
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