首页>
外国专利>
FREQUENCY MEASUREMENT DEVICE, FREQUENCY MEASUREMENT METHOD AND UNDER FREQUENCY LOAD SHEDDING DEVICE
FREQUENCY MEASUREMENT DEVICE, FREQUENCY MEASUREMENT METHOD AND UNDER FREQUENCY LOAD SHEDDING DEVICE
展开▼
机译:频率测量装置,频率测量方法和频率负荷切入装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
A frequency measurement device comprises a sampling unit that outputs a voltage sampling value in accordance with a voltage to be sampled and a sampling frequency; an single-cycle DFT angle shift computation unit that computes and outputs a first angle shift in accordance with the voltage sampling value; an multi-cycle DFT angle shift computation unit that computes and outputs a second angle shift in accordance with the voltage sampling value; a selection unit that selects and outputs one of the first and second angle shifts as a selected angle offset; a sampling frequency computation and outputting unit that computes a sampling frequency in accordance with the selected angle offset and outputs the same to the sampling module unit as a new sampling frequency; and a frequency measurement value computation and outputting unit that computes and outputs a frequency measurement value in accordance with the selected angle offset.
展开▼