A direct method based on tensor calculation to determine maximum loadability power flow solutions

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• 作者：Roberto S. Salgado ; Anesio F. Zeitune
• 关键词：Maximum loadability ; Direct methods ; Tensor term ; Saddle-node bifurcation ; Sensitivity analysis
• 刊名：Electric Power Systems Research
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：103
• 期：Complete
• 页码：114-121
• 全文大小：652 K

文摘

In this paper, the determination of critical loadability points of the power flow equations is formulated as an optimisation problem. A quadratic parameterisation scheme is used to model the load change, which is equivalent to implicitly including a non-negativity constraint in the load variation. The power flow equations are expressed in rectangular coordinates. This is suitable to exploit the second order information (tensor term) of the equations representing the optimality conditions. The use of this term improves the convergence of the iterative process and facilitates the manipulation of the reactive power generation limits. Simulation results obtained with a number of power systems, including real networks, are used to illustrate the main features of the proposed methodology.