2022 EMTP® Fall User Conference

The EMTP^® development team is introduced, along with the program schedule and a brief history on EMTP^® . Also, attendees will have the chance to learn about upcoming software developments, provide feedback to developers, request updated modules, features, and discuss EMTP-related issues.

Modern intelligent digital relays embedded with phasor measurement units have facilitated easy access and collection of electrical signals in a microgrid.  In this work, a model for detection, location and isolation of faults in AC microgrids is presented. The real time voltage, frequency and current data are processed via simple formulations to detect the fault. The tripping command is promptly communicated to the incumbent line relays within fault tolerance time, after fault detection. The proposed scheme assures reliable protection in grid connected and islanded mode of operation with added security in case of primary protection failure. Post tripping, the exact location of fault in any distribution line from utility grid is predicted using a fault locator module. This module is designed and developed by gaussian process regression technique. Further, various machine learning techniques used for fault location has been explored and compared to establish the superiority of GPR method over others. Also the features extracted for model training is quite simpler, which imposes less computational burden on central protection computer. An IEEE 15 bus distribution system with synchronous and solar photo voltaic based DG is simulated in EMTP platform to generate the electrical data. Further the required calculations are performed in MATLAB 2020a.

Ferroresonance is an oscillating phenomenon between a non-linear inductance and a capacitor that can results in highly distorted over voltages and overcurrent. Ferroresonance phenomenon occurs when a ferromagnetic core inside an electrical device – primarily a voltage transformer or an unloaded power transformer – operates in the saturated condition, under which inductance has become a non-linear element. In practice, ferro resonance can be triggered even by a temporary introduction of core into saturation, e.g. resulting from switching operations or a change in voltage resulting from an earth fault.

This presentation covers the methodology to arrive at the optimal value of a 765kV EHVAC system. The study examines the behavior of NGR given the variation of different system parameters, such as degree of reactive compensation, line length, fault location, power flow, and bus capacity.

The study of the damage and protection of systems against EMP weapons is very critical, especially for military purposes. This paper discusses the coupling modes and damage mechanisms of intense electromagnetic pulses (EMP); the interference effect of EMP on ELV systems is simulated and analyzed using EMTP.

This presentation shows a detailed insulation coordination verification using EMTP. It includes an accurate representation of transmission line components considering actual site data such as conductor arrangement, line length, line parameters, insulator details, tower structure and location, tower grounding resistance, and lightning data.

In this presentation the modelling of earth conduction effects on the steady-state and electromagnetic transient (EMT) analysis of aboveground pipelines caused by nearby OHLs is presented by using EMTP.

As part of this presentation, calculations of direct lightning overvoltages are analyzed in a medium-voltage line of such type, equipped with a multi-point grounded shield wire over lossy soil, taking into account the effects of electromagnetic pulses (LEMPs), which are generally ignored when direct strokes are studied.