February 2020
Intermediate
624 pages
22h 1m
English
Content preview from Transient Analysis of Power Systems
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Chapter 3Solution Techniques for Electromagnetic Transient Analysis
Juan A. Martinez‐Velasco
3.1 Introduction
A transient phenomenon in any type of system can be caused by a change of the operating conditions or the system configuration. Transient phenomena in power systems are caused by faults, switching operations, lightning strokes, or load variations. The importance of their study is mainly due to the effects these disturbances can have on the system performance or the failures they can cause to power equipment [1–9].
Stresses that can damage power equipment are of two types: overcurrents and overvoltages. Overcurrents may damage some power components due to excessive heat dissipation; overvoltages may cause insulation breakdowns (failure through solid or liquid insulation) or flashovers (insulation failure through air). Protection against overcurrents is performed by specialized equipment whose operation is aimed at disconnecting the faulted position from the rest of the system by separating the minimum number of power components from the unfaulted sections. Protection against overvoltages can be achieved by selecting an adequate insulation level of power equipment or by installing devices aimed at mitigating voltage stresses. In order to select an adequate protection against both types of stresses, it is fundamental to know their origin, estimate the most adverse conditions, and calculate the transients they can produce.
Modern power systems are complex and require advanced ...
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