摘要
实际信号中通常叠加有随机噪声,针对Prony算法对噪声较为敏感的不足,将小波变换和扩展Prony分析相结合应用于电压闪变检测分析。采用一种基于新阈值函数的小波去噪法对含噪闪变信号进行去噪预处理,并通过扩展Prony分析提取去噪后信号的特征信息。仿真实验结果表明,该方法有助于提高扩展Prony算法对电压闪变信号检测的精确性,并验证了其准确性和有效性。
The actual signals usually include stochastic noise,while the Prony algorithm is sensitivity to noise.In this paper,extending Prony analysis and wavelet transform are integrated and applied to voltage flicker detection to avoid that.The wavelet transform based on a novel thresholding function is adopted for denoising pretreatment,then the parameters of voltage flicker are precisely calculated by extending Prony analysis.The results of simulation show that this method can improve the accuracy of voltage flicker analysis detected by extending Prony analysis,and the effectiveness is verified.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第10期43-47,78,共6页
Power System Protection and Control
