For evaluating the lightning performance of distribution lines it is crucial the availability of a tool for the calculation of lightning-induced voltages. Such a tool can be a) a simple analytical formula (as for instance the Rusck one [1], adopted in the IEEE Std 1410 [2]), b) a computer code (as for instance the LIOV code [3,4], adopted in [5]). An analytical formula presents the main advanta...

ATPDraw is a graphical preprocessor to the ATP-EMTP on the MS Windows platform. This paper outlines some of the latest developments of ATPDraw, including improved handling of MODELS, direct execution of ATP, more components, and the User’s Manual. The ongoing development is also presented.

<span lang="EN-US">Ground grid system is important for preventing the hazardous effects of overvoltage in high voltage substations due to fault current perhaps from lightning strike or device malfunction. Therefore, this study aimed investigate on square, rectangular and L-shaped ground grids with rods being distributed mesh-pattern by using alternate transients program/electromagnetic pr...

Electromagnetic transient programs (EMTPs) are widely used for simulating electromagnetic in power systems. With the increasing interest integrated energy system (IES), it would be beneficial to extend scope of EMTP-type application multi-physics transients electrical and gas networks. An efficient accurate model pipeline is proposed EMTP simulation pneumatic transients. The split into a number...

Double circuit flashovers may cause very severe system disturbances when taking place on some critical double-circuit lines of an electrical network. Line arresters offer efficient solution to protect these specific against double outages due lightning. This paper will study, a 400-kV line, the protection provided by line The efficiency several configurations be compared. For that purpose, ligh...

Digital technology has advanced very significantly over the years both in terms of software tools and hardware available. It is now applied extensively in many area of electrical engineering including protective relaying in power systems. Digital relays have many advantages over the traditional analog relays. The digital relay is able to do what is difficult or impossible in the analog relays. ...

This paper deals with fault location on three-terminal power line. The fault locator is considered as associated with the line protective relay, which communicates with the relays from the remaining line terminals and receives from them the phasors of measured threephase currents. Three subroutines of the fault location algorithm are formulated and an issue of selecting the subroutine, which is...

This paper investigates the lightning impulse duty for 400 kV underground power cables using EMTP/ATP and re-assesses the recommended design level based on probabilistic analysis. The work is a part of a larger investigation that will study by computer simulation, the full range of transient overvoltages due to lightning, switching, faults and other temporary overvoltages (TOV) on cables within...