The power factor improvement has a great concern in the distribution system due to large motor installed in industrial system. The capacitor bank was installed to improve the power factor in the distribution system. Due to frequently capacitor bank switching has create transient phenomena in the distribution system and their effects the power quality. The aims of this research to study and simulate the effects of capacitor bank switching in the distribution system. The simulation has been conduct with PSIM software by modelled the system which contain of supply, load and three capacitor bank. The simulation was conducted with two conditions which are single bank and bank to bank switching. For single bank switching peak voltage of phase R reached about 60.9 kV and peak inrush current is reached about 6.7 kA. While for bank to bank switching the peak voltage of phase R reached as high as 59 kV and the peak inrush current is almost 8.2 kA. Corresponding author: drindra@bunghatta.ac.id , 0 (2018) E C 2018 https://doi.org/10.1051/matecconf /2018248020 MATEC Web of Conferences 248 STI 0 04 20 4
Increasing demand for large-scale power delivery with high reliability and quality necessitates the use of multiple distributed energy resources to be connected in parallel; for example, parallel inverters operation. Proper operation of parallel inverters requires sophisticated control techniques and many have been proposed and continue to evolve. This paper depicts the droop control techniques for the parallel inverter systems. The recent improvements and variants of this control technique are presented
This paper discussed about power factor on harmonic effect due to types of voltage source. Usually, the voltage source is sinusoidal. But in actual condition the load that has voltage sources through the elements where the output voltage of element as input to load is not pure sinusoidal, for example at Power of Common Coupling (PCC) between transformer and linear load and nonlinear load. The research has been done with Schhafner Power Quality Analyzer and was focused to power factor (p.f.), Total Harmonic Distortion (THD), and harmonic energy losses cost from measurement where load is Induction motor and Adjustable Speed Drive (ASD). As voltage source in this research are sine wave, square wave and combinations of 3 rd , 5 th and 7 th harmonic order like harmonic 313, and harmonic 357.
This research focused on the effect of harmonic to the performance of current transformer (CT) operates under harmonic conditions. Due to the increasing of harmonic in power system, the CT did not perform well. The CT may saturates due to the presence of voltage and current harmonics. In this project, a laboratory test was conducted to investigate and analyze the influence of harmonics to the CT performance. This CT has been test with different Total Harmonic Distortion Current (THDi) at primary side and constant primary current. The experiment result shows the secondary current CT errors will increases when THDi increases.
Substation grounding purpose is to secure the safety of personal that are in the vicinity and provide protection of the equipment when short circuit faults. The grounding grid design is an important factor in a substation for fulfilling standard requirements formulated by IEEE Std. 80. Commonly, substation grounding is grid configuration or combination of grid and rod. This study is designing a substation economically by considering the length of rod conductor used. Some grid configuration models were used for analyzing viz. rectangular shape, T-shape and L-shape. The models were compared with the existing design in the Galang substation for finding the minimum conductor length. The grid grounding of the Galang substation is the rectangular shape. By using ETAP package software, the important parameters in design substations such as step voltage, touch voltage for 50 kg body weight can be obtained. The parameters must fulfill the IEEE std. 80-2013 as a safety requirement for designing of the substation. From various configurations were applied, all the shapes models meet the IEEE Std. 80, but T-shape is the most economical design based on the conductor length used.
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