Stochastic Dynamics of Power Systems by Ping Ju

Author:Ping Ju
Language: eng
Format: epub, pdf
ISBN: 9789811318160
Publisher: Springer Singapore

It should be noted that the input and output locations are the same. Thus, the influence of electrical distance between input and output on oscillation amplitudes is omitted and only the influence of oscillation mode is analyzed. In fact, the electrical distance is another vital factor that influences a response oscillation amplitude. This factor is calculated and analyzed as follows.

According to Fig. 5.4, load buses 29, 28, 26, and 27 share a close electrical distance with G9. Therefore, it is considered that these 4 buses can be selected as equivalent current injection points to simulate the stochastic fluctuations of loads at different locations. Then, to make the electrical distance between input and output more visualized and easier to compare, output observation points are located in G9, which can also avoid influence on other generators. The relative power angle of G9 against G10 is selected as the output variable. Finally, it is assumed that the frequency band of the stochastic disturbance power spectrum falls in 0.8–1.0 Hz to excite the oscillation Mode 8 in which G9 participates to a high degree, as shown in Fig. 5.14.

Fig. 5.14Power spectrum of stochastic disturbance

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