Fast S-Transform for Time-Varying Voltage Flicker Analysis
Fast S-Transform for Time-Varying Voltage Flicker Analysis
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DOI：
10.1109/tim.2013.2277618
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发表时间：
2014
影响因子：
5.6
通讯作者：
Wenxuan Yao;Qiu Tang;Zhaosheng Teng;Yunpeng Gao;He Wen
中科院分区：
文献类型：
--
作者：
Wenxuan Yao;Qiu Tang;Zhaosheng Teng;Yunpeng Gao;He Wen
电压闪变分析是电力系统电能质量评估的基本工具之一。本文提出了一种新的算法——快速S变换（FST），并用于分析时变电压闪变。通过Teager-Kaiser能量算子瞬时获得捕捉主要闪变特征的电压闪变波形包络。与 S 变换相比，FST 的计算复杂度要低得多。 FST用于提取每个闪烁分量的时域和频域信息。该算法可以很容易地用硬件乘法器实现，使得该方法成为闪烁时频分析实时应用的良好选择。还介绍了该算法在双核处理器数字信号处理器和基于先进RISC机器的电压闪变计中的实现。仿真和应用结果验证了该算法的准确性和效率。
Voltage flicker analysis is one of the elementary tools of power quality assessment in power systems. A new algorithm, fast S-transform (FST) is proposed and is used to analyze the time-varying voltage flicker in this paper. A voltage flicker waveform envelope, which captures the main flicker characteristic, is obtained by Teager-Kaiser energy operator instantaneously. FST achieves much lower computational complexity in comparison to the S-transform. FST is used to extract both the time and the frequency domain information of each flicker component. The proposed algorithm can be easily implemented with hardware multipliers, making the method a good choice for real-time applications for the time-frequency analysis of flicker. The implementation of the proposed algorithm in the dual-core processor-digital signal processor and advanced RISC machines-based voltage flickermeter is also introduced. The simulation and application results validate the accuracy and efficiency of the proposed algorithm.