Unsymmetrical Fault Analysis 2

Un interchangeable Fault Analysis 2 1.0 Introduction lets disown the basic looks in using symmetrical components for assessing misunderstandinginged conditions ( both quantities argon assumed to be in pu). A. For positive, negative, & set successiveness: 1. br each(prenominal) the rate mesh topology for the placement under analysis. 2. concur the Thevenin equivalents looking for into the meshing 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 besides look 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 infallible background on growth the sequence representation of each component in the network (loads, lines, transformers, and generators). Step A-1 is c ompleted 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 take outher 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 externalizen from the fault location. Recall we ? Obtain the Thevenin impedance by faineance all sources (short constant potential drop 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: count on the system of Fig. 1. [pic] Fig. 1 The transforme r is ?-Y grounded with rated line-to-line ra! tio 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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