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The low-frequency AC (LFAC) transmission is a competitive scheme for offshore wind power integration, in which the modular multilevel matrix converter (M3C) is the key equipment. In this paper, the… Click to show full abstract
The low-frequency AC (LFAC) transmission is a competitive scheme for offshore wind power integration, in which the modular multilevel matrix converter (M3C) is the key equipment. In this paper, the selection methods of the M3C main circuit parameters are proposed. First, the maximum arm voltage is derived and the selection method of the sub-module (SM) number is established. Then, according to the switching function approach, the analytical expressions of the average SM capacitor current and the average SM capacitor voltage are derived. On this basis, the selection method of the SM capacitance is proposed. Additionally, the design principle of the arm inductance is proposed. Finally, a case is elaborated to illustrate the proposed M3C main circuit parameter selection methods and provide a reference for practical projects.
Journal Title: IEEE Transactions on Circuits and Systems II: Express Briefs
Year Published: 2022
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