摘要
提出了一种基于正、负序级联延时信号消除(DSC)算法的同步信号检测法,其软件锁相环(SPLL)能够实现对三相电压电流基波正、负序分量的快速提取,并且通过选择不同的参数,可滤除任何次数谐波的干扰。该方法无需采用滤波器,从而具有良好的动态性能。仿真和实验均表明,该方法能快速有效地提取三相信号不对称且畸变情况下的频率、相位与正、负序分量,并且同时具备稳态精确性和动态快速性。该方法能为三相并网型PWM变换器在电网发生跌落及谐波畸变时的良好运行控制提供保障。
A synchronization signal detection based on positive and negative sequence cascaded delayed signal can- cellation（DSC） method is proposed.The positive and negative sequence components of the fundamental voltage or cur- rent in three-phase system can be caleulated with fast transient response, and any specified harmonic can be elimi- nated by choosing appropriate parameters.No low-pass filters are needed and perfect dynamical performance can be achieved.Simulation and experimental results show that the frequence, phase and positive and negative sequence com- ponents can be gotten with fast dynamic response and high precision.The method provides a reliable basis for the three-phase grid connected PWM converters under the conditions of droping and harmonic.
出处
《电力电子技术》
CSCD
北大核心
2012年第5期78-80,共3页
Power Electronics
基金
国家自然科学基金(50737004)~~
关键词
信号检测
延时信号消除
锁相环
相位检测
signal detection
delayed signal cancellation
phase-lock loop
phase detection
