Using PowerWorld Simulator case Example 9_8, plot the variation in the bus 2 phase ‘‘a,’’ ‘‘b,’’ and ‘‘c’’ The type of bus 2 fault that gives the highest per-unit voltage magnitude is the Double Line-to-Ground.ĩ.59. With case Example 9_8 to determine the type of bus 2 fault that gives the highest per-unit voltage magnitude.

Voltage magnitudes at bus 2 actually rise above the pre-fault voltage of 1.05 per unit. The results in Table 9.5 show that during the single line-to-ground fault at bus 2 the ‘‘b’’ and ‘‘c’’ phase