周期性电压闪变信号数学模型频率特性分析  

Frequency Characteristic Analysis of Periodic Voltage Flicker Signal Mathematic Model

作　　者：于静文[1] 薛蕙[1] 温渤婴[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083

出　　处：《电力系统及其自动化学报》2012年第2期72-77,共6页Proceedings of the CSU-EPSA

摘　　要：在IEC给出的闪变仪设计原理基础上,研究了周期性电压闪变信号数学模型的频率特性。文中将电压信号自乘求平方后的数学模型分成了5个部分,分别研究了各个部分的频率特性,及各个部分与调幅波频率的关系。得出周期性电压闪变信号数学模型的频率特性:电压波动分量不一定等于调幅波分量;不同频率调幅波产生电压波动的成分不同;不仅频率在0～35Hz的调幅波信号可以产生闪变,频率大于50Hz,甚至大于100Hz的调幅波信号也会产生频率范围0.05～35Hz的电压波动,从而产生明显的闪变。The frequency characteristic of voltage flicker signal mathematic model is studied based on the theory of IEC standard.The square of the voltage signal is divided into five parts,the frequency character of each part and the relationship between the each part and the frequency of modulated waveform are studied.The conclusions are as follows： Voltage fluctuation components are not always the modulation wave;Modulation wave with different frequency induce different voltage fluctuation components;Not only the modulation signals with frequency of 0.05-35Hz induce flicker,but also the modulation signals with frequency higher than 50Hz,even higher than 100 Hz can induce perceptible flicker.

关 键 词：闪变 调制信号 频率特性 电压波动 

分 类 号：TM715[电气工程—电力系统及自动化]