Figure 3.31 Oscillations in the rotor angle of the embedded generator at bus E following a fault at bus D when this generator produces 11.6 MW. The fault is applied at t = 100 ms and cleared at t = 300 ms. Note that this particular computer program keeps all angles as being between +180 degrees and −180 degrees. There is thus no discontinuity in angle at t = 445 ms – simply a modulus operation
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