In this research study, three case studies were simulated to understand the transient and dynamic performances of the plant model.

Case Study 1 - Comparison between fault simulated at different locations, Busbar 10 and Busbar 8.

With Area 1 exporting 400MW to Area 2, the parameters using the load flow analysis were programmed into the system model in the MATLAB workspace. The followings show the waveforms of the various control parameters of the plant when a three-phase fault is simulated at Busbar 10 and Busbar 8.

(I) Results:

Responses of Mechnical Power Output (parameter showing the most significant differences)

(II) Discussions:

1. Mechnical power output of G4 (gas turbine) responds more rigorously, with large fluctuations, to the three-phase fault applied into the system model during the simulation test than the rest of the four generators.
2. Mechnical power output of G5 (steam turbine) has almost no change in its responses to the fault being applied.
3. Generators of conventional steam units (G1, G2 and G3) have little response to the fault applied at different locations, hence their effects on transient stability studies can be ignored.
4. When the fault is being simulated further away from the CCP, the fluctuations in the mechnical power output of the gas turbine, G4 is less rigorous and rapid. Therefore in this case, the control performances of the plant model reach steady-state faster.