By S A Soman; S A Khaparde; Shubha Pandit
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Extra info for Computational methods for large sparse power systems analysis : an object oriented approach
Solid State Current Limiter (SSCL): This is a GTO based device that inserts a fault current limiting inductor in series with the faulted circuit as soon the fault is detected. The inductor is removed from the circuit once the fault is cleared. 2. Solid State Circuit Breaker (SSCB): This device can interrupt a fault current very rapidly and can also perform auto-reclosing function. This device, based on a combination of GTO and thyristor switches, is much faster than its mechanical counterpart and is therefore an ideal device for custom power application.
Impulsive transients usually do not conduct far the point of their entry into the power system. The distance to which an impulsive transient travels along a feeder depends on the particular system configuration. Let us consider the following example. 1. In this the source supplies two buses to which loads are connected. A fixed capacitor can be connected to load Bus-l through the switch. 0 sine 100m) per unit. The loads are assumed to be inductive. 0157 per unit. 1. Single-line diagram of a radial distribution system Let us first assume that the capacitor is not connected to Bus-I.
A new trend however is emerging currently, in which significantly smaller sized generating units are being connected at the distribution level. Some of the factors that contribute to this trend are listed below. - - - - - Greenhouse gas issues have become very significant in many countries to consider dispersed energy sources such as solar, wind and wave that operate with smaller sized units. Local generating units using gas microturbines are becoming more economical when the transmission and distribution overheads are taken into account.
Computational methods for large sparse power systems analysis : an object oriented approach by S A Soman; S A Khaparde; Shubha Pandit