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Circuit breaker (CB) installed for capacitor bank is the CB which commonly experiences the switching process due to the capacitor bank function as a voltage regulator. In closing switching process, CB encounter transient condition due to inrush current. In this paper, the simulation for studying the inrush current characteristic of capacitor bank switching in Indonesia has been performed. Simulation...
In Indonesia distribution system, the power distribution from 20/0.4kV transformer to customer feeder is done using low voltage switchboards. Low voltage switchboard utilized in Indonesia distribution system is consist of several fuse rails, where each fuse rail supplies one customer feeder and the amount of fuse rail that is mounted to low voltage switchboard is depended on the capacity of 20/0.4kV...
The isolated electrical system is the one solution for electrical distribution in the archipelago. Any disruption to this system would disserve the public and detriment the utility companies because it can't sell the energy. The problem of an isolated solar plant failure is happened in Indonesia exactly in System A. Currently, there are few references that address the investigation of real cases problem,...
Tertiary winding connection arrangement might give various effects in conjunction with modern Inter Bus Transformer (IBT) failure. An investigation was conducted upon the failure of an IBT which consist of three one-phase-banks and had one side of delta tertiary winding connection grounded through the tertiary bushings. Apart from the oil test, all routine maintenance historical data showed no early...
This paper discuss about the investigation of 150kV capacitor voltage transformer (CVT) breakdown which is occurred simultaneously after capacitor bank disconnecting process. Analysis is performed referring to the last routine maintenance and digital fault recorder (DFR) data. Based on the analysis of both data and transient simulation analysis from the model created to represent the condition during...
Historical lightning data could be use to evaluate certain transmission line in power system network. By using historical data from lightning detection system with combined Magnetic Direction Finder and Time of Arrival method, lightning data mapping for West Java province was presented in this paper. According to the lightning data mapping from total recorded event, the peak current of the lightning...
In Indonesia, there are many capacitor bank installed to regulate the nominal voltage. Currently, the Recovery Voltage (RV) data related to the capacitor bank switching is unavailable, whereas this data is very important to analyze Circuit Breaker (CB) performance to understand whether it will success to interrupt the current or not. In addition, if the CB cannot retain the RV, it will degrade the...
This paper discuss about effect of traction substation for high speed railway in Indonesia. The purpose of this paper is to obtain magnitude of voltage and current unbalance due to traction substation that perceived by system and generator adjacent to traction substation. Analysis is performed by doing simulation of 5 scenarios in simple system model that created in power system simulation program...
Calculation of transmission line parameter such as capacitance and inductance had been done by several researchers. However, it's common that in calculation, the earth surface under the transmission line is assumed to be horizontal. In fact, the earth surface is not horizontal but has an uneven contour. This paper explained a method to determine the parameter value of transmission line which passing...
The existence of the phasor measurement units (PMU) technology provides new approach in understanding the condition of power system compared to the old technology. However, the parameters recorded by the PMU still rely on traditional installed measuring equipment. The measuring equipment has its own level of accuracy which will affect the data credibility for further analysis. Furthermore the accuracy...
Four circuits transmission line is an alternative solution to transfer high quantity of electrical power. The transmission line has four parallel circuits on a tower and can be categorized as a new type of transmission line in Indonesia. Therefore, its electrical characteristics should be investigated. This paper studied the switching transient of the transmission line and evaluates the electrical...
Field data showed that several paralleled transformers only fulfill some requirements stated in IEC 60076-8. Unequal voltage ratio and short circuit impedance difference between multiple Inter Bus Transformers (IBT) in parallel operation will generate serious problem. Therefore, an evaluation should be conducted before performing parallel operation. This study proposed a brief evaluation of transformer...
The ability to diagnose the integrity of the transformer windings and core through online diagnostic method would be useful for electric utilities who are concerned about the availability and reliability of power transformer. This paper presents results of a study to identify the condition of power transformer windings and core by measuring the vibration signal of outdoor transformer in normal operating...
Vibration Analysis has been beneficial for monitoring and assessment of High Voltage Transformer winding and core condition. A lot of research has been conducted to extract useful information from the vibration signals using various transformation methods. In this paper, several methods are evaluated to determine which method is better in providing consistent and reliable parameters to be used as...
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