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This paper explores the impact of HVDC line on the convergence property of AC/DC power flow calculation. Firstly, the model of AC/DC power flow computation is constructed, including unified method and alternate iterative method. Then, an improved Levenberg–Marquardt (LM) method with line search technique is developed to solve the nonlinear equations of AC/DC power flow. To test the convergence property...
This paper presents an alternate iterative method to perform AC/DC optimal power flow (AC/DC OPF) calculation considering wind farm integration. Firstly, an original AC/DC OPF model considering wind farm integration is constructed. Then, according to the decoupling theory in the alternate iterative method, the decoupling optimization model of AC/DC OPF model is derived, where the high voltage direct...
This paper is concerned with the limit operation state of AC/DC hybrid system based on the alternate iterative method to solve the AC/DC power flow. A modified Levenberg-Marquardt (LM) method is employed to solve the nonlinear equations of AC power flow and DC equations, respectively. Then, the heavy load system is constructed by expanding the same times of real and reactive load to explore the limit...
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