Equipment ratings and per-unit reactances for the system shown in Figure 9.19 are given as follows: Synchronous

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Equipment ratings and per-unit reactances for the system shown in Figure 9.19 are given as follows:

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Synchronous generators:

\(\begin{array}{lllll}\text { G1 } & 100 \text { MVA } & 25 \mathrm{kV} & \mathrm{X}_{1}=\mathrm{X}_{2}=0.2 & \mathrm{X}_{0}=0.05 \\ \text { G2 } & 100 \mathrm{MVA} & 13.8 \mathrm{kV} & \mathrm{X}_{1}=\mathrm{X}_{2}=0.2 &  \mathrm{X}_{0}=0.05\end{array}\)

Transformers: 

\(\begin{array}{llll}\text { T1 } & 100 \text { MVA } & 25 / 230 \mathrm{kV} & \mathrm{X}_{1}=\mathrm{X}_{2}=\mathrm{X}_{0}=0.05 \\ \text { T2 } & 100 \mathrm{MVA} & 13.8 / 230 \mathrm{kV} & \mathrm{X}_{1}=\mathrm{X}_{2}=\mathrm{X}_{0}=0.05\end{array}\)

Transmission lines:

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Using a 100-MVA, \(230-\mathrm{kV}\) base for the transmission lines, draw the perunit sequence networks and reduce them to their Thévenin equivalents, "looking in" at bus 3. Neglect \(\Delta-Y\) phase shifts. Compute the fault currents for a bolted three-phase fault at bus 3 .

Step by Step Answer:

Related Book For  book-img-for-question

Power System Analysis And Design

ISBN: 9781305632134

6th Edition

Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

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