A valve-level control method for flexible direct current transmission system
A power transmission system, flexible DC technology, applied in the direction of DC network circuit devices, AC network circuits, electrical components, etc., can solve problems such as processing a large amount of data, and achieve the effects of reducing losses, reducing time occupied, and low harmonic content
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[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0028] The flexible direct current transmission system of the present invention is composed of three-phase six bridge arms, and each bridge arm is composed of coupled or uncoupled inductors and N identical sub-modules cascaded. Each sub-module consists of two IGBTs, two reverse diodes and a DC capacitor, the structure is as follows figure 1 As shown, the DC current and the current flow direction of the upper and lower arms are as follows figure 1 As shown, the valve-level control method of the flexible DC transmission system is composed of modulation algorithm, sorting algorithm and selection algorithm. The specific principle is shown in figure 2 , the valve-level control method of the flexible direct current transmission system includes the following steps:
[0029] 1 According to the signal issued by the extreme control of the valve-lev...
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