基于改进的FastICA算法的电压闪变检测  

Voltage flicker detection based on improved FastICA algorithm

作　　者：汪斌[1] 王年[1] 蒋云志[1] 程志友[1] 鲍文霞[1] 

机构地区：[1]安徽大学教育部电能质量工程研究中心,安徽合肥230039

出　　处：《电力系统保护与控制》2011年第17期7-11,共5页Power System Protection and Control

基　　金：安徽省科技攻关计划重大科技专项项目(08010202034);安徽省高校青年教师资助项目(2008jq1023);安徽省教育厅自然科学研究重点项目(KJ2010A007)

摘　　要：提出了一种基于改进的快速独立分量分析(FastICA)算法的电压闪变检测方法。将闪变信号乘以一个与基波电压同相位同频率的同步电压得到一个乘积信号并将其变换为包络信号和中心频率为100Hz的双边带调幅信号的线性组合;依据负熵极大的独立性准则和改进的FastICA算法实现了电压闪变信号的盲分离。为了更好地逼近真实信号,对分离得到的包络信号进行幅值修正,最终完成电压闪变信号的检测。仿真结果表明了该算法的正确性和可行性。This paper presents a voltage flicker detection method based on an improved fast independent component analysis （FastICA） algorithm. The multiplicative result of flicker signal and synchronizing voltage which has the same phase and same frequency with the fundamental wave is transformed into the signal combination of envelope signal and double side band modulated signal with 100 Hz as its central frequency; with improved FastICA algorithm, voltage flicker signal separation is then carried out according to the independency principle of maximizing Negentropy. In order to approximate the real signal better, the paper amends the amplitude value of the separated signal and finally achieves the voltage flicker detection. Simulation results show that this algorithm is correct and feasible.

关 键 词：电力系统 独立分量分析 电压闪变 盲分离 FASTICA 电能质量 

分 类 号：TM711[电气工程—电力系统及自动化]