基于复系数陷波滤波器锁相环的电网正序分量检测  

A grid positive sequence component detection on the basis of complex coefficient notch filter PLL

作　　者：谢聪[1] 吴新开[1] 雷雅云 李强[1] 

机构地区：[1]湖南科技大学信息与电气工程学院,湖南湘潭411201

出　　处：《微型机与应用》2015年第9期75-77,80,共4页Microcomputer & Its Applications

摘　　要：为满足在电网电压不平衡情况下的系统控制需求,需要快速而准确地检测出基波正负序分量的幅值和相位。采用无限脉冲响应(IIR)复杂系数陷波滤波器结合锁相环来提取基波分量中的正序分量,利用MATLAB/simulink仿真软件,在三相电压不平衡和电网电压频率突变的情况下对系统进行仿真,仿真结果证明了该方法能在电网电压不对称的条件下准确检测出正序分量的幅值和相位。In order to satisfy the grid-converter system＇s control needs in the situations of grid voltage unbalance, it requires to detect the fundamental amplitude and phase of the positive and negative sequence components quickly and exactly. By combining infinite impulse response （IIR） complex coefficient notch filter with phase-locked loop to extract the positive sequence component in the fundamental component, this thesis uses the MATLAB/Simulink simulation software to simulate the system in the case of a threephase voltage unbalance and grid frequency mutations. The simulation result shows that under the conditions of the grid voltage asymmetry, this method can accurately detect the amplitude and phase of the positive sequence.

关 键 词：锁相环(PLL) 正负序分量 复系数 陷波滤波器 

分 类 号：TM46[电气工程—电器]