2018/11/09 by Robert Owusu-Mireku, Owusu-Mireku, Robert, Hsiao Dong Chiang +1
Engineering · Energy · #Power System Optimization and Stability #Power Systems and Renewable Energy #Microgrid Control and Optimization
paper · pdf · doi:10.48550/arxiv.1811.05316
In this paper, we study numerically the behavior of the closest unstable equilibrium point (UEP) on the stability boundary of a stable equilibrium point (SEP) of a post-switching power system along a P-V curve. Using the structure-preserving model of the WSCC 9-bus 3-machine system, we show that along the load curve, the closest UEP can switch to a new UEP. We also show that the stability region of the post-switching SEP can expand and contract as the load moves towards the nose point of the P-V curve. Our numerical results also show the impact of the direction of movement of the closest UEP on the size and shape of the stability region of a SEP.