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The most necessary and difficult step of CS(Compressed Sensing) is the sparse representation of the signal. The paper uses DCT(Discrete Cosine Transformation) and DWT(Discrete Wavelet Transform) as the sparse matrix and different power quality signal as the test signal to research and verify the sparse representation and the reconstruction performance. Compare and analyze the performance of the redundant...
A test was performed on the short-circuit current of a hybrid HVDC circuit breaker for the first set of flexible DC loop network system with the highest voltage class of ±500kV in the world, and this paper makes an analysis of the breaking function of a DC circuit breaker configured in a distributed manner in a symmetrical bipolar wiring mode. By setting up a four-terminal loop flexible DC...
A Chaotic Optimization Algorithm (COA) is applied to integrated AC/DC hybrid power system in which the multi-infeed DC power transmission system is included, and the research on coordination controls among the HVDC modulations has been investigated in this paper. Chaotic Optimization Algorithms, which have the features of easy implementation, short execution time and robust mechanisms of escaping...
Making use of sound card of high cost performance to substitute data acquisition card, and combining with virtual instrument technique and beat method frequency measurement realizes high-precision frequency measurement. But the existence of the sampling rate deviation resulting from sound card crystal oscillator inaccuracy greatly reduces frequency measurement precision, so error mathematics model...
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