This paper presents a fault identification, classification and fault location estimation method based on Discrete Wavelet Transform and Adaptive Network Fuzzy Inference System (ANFIS) for medium voltage cable in the distribution system. Different faults and locations are simulated by ATP/EMTP, and then certain selected features of the wavelet transformed signals are used as an input for a train...

Accurate and robust fault location algorithm for parallel lines compensated with one three-phase bank of series capacitors in each the line is presented. The algorithm is categorized as one-end fundamental frequency based technique which offsets the series compensation effect and the reactance effect resulting from the remote end infeed under resistive faults as well as takes the countermeasure...

This paper presents a frequency monitoring system for Korean wide-area power protection based on virtual FDR. The virtual FDR is introduced to enhance the simulation capability of frequency monitoring systems and consists of three parts: modeling, estimation, and simulation. Once a power grid model is obtained in the virtual FDR based on EMTP-RV, the frequency is estimated by DFT filtering and ...

It is well known that the Low-Voltage DC (LVDC) distribution system is a promising topology as a future smart distribution system due to its high efficiency and reliability. However, there are still some challenges in the construction and implementation of an LVDC system. For practical application of the LVDC system, therefore, it is necessary to perform any simulation in advance by considering...

This paper presents a unified approach for efficient modeling and simulation in a multi-tool environment. The motivations are clearly defined and the approach is explained. While this method is applicable to a wide range of tools and applications, it is illustrated with Matlab/Simulink, for control system development, and two EMT simulation tools, EMTP-RV and Hypersim. The sample application is...

In this paper, short circuit analysis, based on the electromagnetic transient program (EMTP), has been used to investigate the behavior of the DC reactor type FCL installed in an electrical distribution grid. System studies show that the DC reactor type FCL can not only limit the fault current to an acceptable value, but also can mitigate the voltage sag. A DC reactor type fault current limiter...

The CVT equipment running on site is slightly modified to form a hybrid achieve transient overvoltage measurement, which theoretically feasible and practical. In order study the voltage division method based measure of power system, that is, low capacitor C3 connected in series between terminal medium C2 traditional ground, measurement realized through C3. This article uses ATP-EMTP establish i...

In the neutral ungrounded distribution network, removal of permanent single-line-to-ground (SLG) fault easily leads to saturation electromagnetic voltage transformers (PT), which may cause ferroresonance overvoltage and PT failure. This paper analyzes zero-sequence after SLG reveals mechanism excited by fault. Then, total power transient energy circuit under is analyzed. It then observed that r...

Abstract Microgrids (MGs) are characterized by faster dynamics than conventional grid-connected distributions systems. This is in part due to the lack of inertia inverter-interfaced distributed energy resources such as photovoltaic and storage In this context, load considerably affects transient stability performance MGs, especially if disconnected from main grid. The aim paper analyze influenc...