© The Institution of Engineering and Technology
Continuation power flow (CPF) analysis has been used in the literature to determine the voltage collapse point from active power versus voltage curves (PV curves) for steadystate voltage stability assessment. Affine arithmeticbased (AA) CPF analysis to determine PV curve bounds under uncertainty in power generation was introduced in the literature to overcome the problem of large computational time with Monte Carlo (MC) simulations, by getting a faster solution with a reasonably good accuracy. However, AA operations lead to more noise terms and hence overestimation of bounds. In the present work, a modified AA (modAA)based CPF analysis is proposed to determine PV curve bounds by considering uncertainties associated with active and reactive power injections at all buses in the system. The proposed method reduces the overestimation caused by the AA operations and gives more accurate solution bounds. The proposed modAAbased CPF analysis is tested on 5bus test case, IEEE 57, European 1354 and Polish 2383bus systems. The simulation results with the proposed method are compared with MC simulations and AAbased CPF analysis to show the efficacy of the proposed method.
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