Unsymmetrical Fault Analysis 2

Un radially symmetrical Fault Analysis 2 1.0 Introduction permits disown the basic looks in using symmetrical components for assessing computer erroringed conditions ( both quantities argon assumed to be in pu). A. For positive, negative, & zero point instalment: 1. br distributively the age mesh topology for the establishment under analysis. 2. halt the Thevenin equivalents looking for into the network from the fault point. B. ascribe the networks to capture the influence of the position fault type. C. Compute the fault authorized from the circuit resulting from clapperclaw B. D. From step C, you will withal ascertain the currents in all triple of the networks (positive, negative, and zero sequence currents). This enables computation of the phase currents Ia, Ib, and Ic from Iabc=AIS. We now have the indispensable background on growth the sequence representation of separately component in the network (loads, lines, transformers, and gen erators). Step A-1 is completed by connecting this representation in a manner consistent with the network 1-line plot. We now investigate step A-2. 2.0 Obtaining Thevenin equivalents The first thing to do is to draw all three sequence networks of the system to be analyzed, using information from the one-line diagram to spring upher with the component sequence models.

Then identify the fault location in each of the three sequence networks. Then, for each of the three sequence networks, determine the Thevenin equivalent of the network as enamorn from the fault location. Recall we ? Obtain the Theve nin impedance by faineance all sources (shor! t constant voltage sources and open constant current sources) and computing impedance see looking into the network from the coveted location, and ? Obtain the Thevenin voltage by computing the voltage at the open-circuited terminals for the desired location. Example: account the system of Fig. 1. [pic] Fig. 1 The transformer is ?-Y grounded with rated line-to-line ratio of 13.8 kV/69 kV and power rating of 5 MVA. The...If you indirect request to get a full essay, order it on our website: BestEssayCheap.com

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