摘要
针对电压变换器选型中存在的问题,采用基于小波软阈值的去噪理论对电压变换器的实测数据进行了拟合和去噪,从而提高了变换器线性度、拟合精度并减小了残差。实际应用系统实验结果和分析表明,对价格低廉、线性度不高的电压变换器,选用去噪后的拟合方程来反映其电压变换关系完全满足实际系统控制与保护要求,大大降低了装置的成本,提高了应用系统的性能价格比。
According to the problem on seclection of voltage converter, the paper adopts the denoising method of wavelet soft-threshold fitting and denosing the measured data of the voltage converter, to improve the linearity of voltage convertor and fitting precision and minimize residual error. Experimental result to practical application system shows that by adopting the denoised fitting equation to reflect voltage transformation relation can meet fully the physical system and protection requirement to voltage converter whose price and linearity is low, also can depress the cost of device and the performance-price ratio of application system.
出处
《继电器》
CSCD
北大核心
2008年第4期42-44,50,共4页
Relay
关键词
电压检测
小波去噪
残差
电压变换器
voltage detection
wavelet denoising
residual error
voltage converter
