This paper is concerned with direct or indirect lightning strokes on wind turbines, studying overvoltages and electromagnetic transients. As wind power generation undergoes rapid growth, lightning damages involving wind turbines have come to be regarded with more attention. With the aim of providing further insights into the lightning protection of wind turbines, describing the transient behavi...

A wave propagation characteristic is very significant to investigate a transient voltage and insulation design of a cable. This paper carries out an experiment and a simulation of wave propagation characteristics on an insulation covered conductor in comparison with a bare conductor. The simulations are carried out using Electro Magnetic Transient Program (EMTP) and Finite Difference Time Domai...

One-end fault location techniques for seriescompensated parallel lines are investigated. First, the basic fault location algorithm is presented briefly. Then, the new concept overcoming the drawbacks of the basic algorithm is delivered. The ATP-EMTP program for equivalencing of Series Capacitors (SCs) equipped with Metal Oxide Varistors (MOVs) is presented. Reliable fault data for evaluation of...

In this paper, the history of a power system transient analysis is summarized starting from “Lord Kelvin arrivel curve” in 1850s to numerical electromagnetic analysis methods which solve Maxwell’s equation directly. Also, the problems of theories and formulas adopted in simulation tools such as the EMTP are explained, and the application limits are

This paper presents a new fault location (FL) method for medium voltage (MV) networks operating with the neutral solidly grounded or grounded across a small resistance. The FL algorithm is based on the impedance measurement principle and uses the recorded three-phase voltage and current signals as well as the network impedance for the particular symmetrical components – pre-calculated after eac...

This paper presents some techniques for reduction of transformer inrush current. The equation of inrush current is obtained and then by using these methods, transformer inrush current is reduced, then after comparing the result of each method, the best choice is determined. Results which have been obtained from EMTP simulation confirm these subjects.

Currently, several offline digital simulation software tools are available, with varying degrees of modeling and simulation capabilities. This paper aims to compare the capabilities of two program packages for electric network simulation: ATP-EMTP and PSCAD/EMTDC for modeling lightning overvoltages. 2000 Mathematics Subject Classification: 68Uxx/Subject Classification for Computer Science. 281,...