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Due to the nonconvexity of optimal power flow (OPF) problem, the methods based on the Karush-Kuhn-Tucker necessary conditions can only guarantee to get a local minimal solution. This paper presents a new method by combining primal-dual interior point method (PDIPM) and filled function method (FFM), which can converge to a global minimum of the OPF problem. The proposed method includes two stages in...
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