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Most of Frame Buffer Compression (FBC) methods are based on variable-length compression algorithm. The proposed fixed-ratio frame buffer compressor, which is based on S3 texture compression (S3TC) algorithm, compresses the recently rendered image into DXT format so that it can be employed as input compressed texture. We have optimized the frame buffer compressor to achieve real time performance and...
Considering the synthetical effects of redundant submodules and arm-asymmetric operating conditions within the modular multilevel converter (MMC), a modified mathematical model is established in this paper, and the modified switching function and the mechanism of circulating current are analyzed. On this basis, an optimized modulation strategy is proposed to minimize the fundamental component of the...
This paper analyzes the dc line fault transient stability characteristics of AC/DC power systems based on three different modular multilevel converter based high power direct current (MMC-HVDC) configurations. The first configuration is half bridge sub-module based MMC (H-MMC) HVDC configuration, which clears dc line faults by tripping the ac circuit breakers. Voltage source converters (VSC) with...
The multi-infeed HVDC problems are the limiting factors for the application of the dc technology in the long-distance bulk-power transmission in China. Thus, this paper presents two new techniques to solve these problems: one is the grid dynamic segmentation technique and the other is the VSC-HVDC technique. Firstly, two aspects of the multi-infeed HVDC problem, i.e. concurrent commutation failure...
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