摘要
针对电网出现的频率偏差 ,提出一种谐波负序电流指令的检测方法。以瞬时无功功率理论为基础 ,结合控制电路系统的电压同步电路设计 ,研究谐波负序电流指令信号的数字信号处理方法 ,并用Hamming窗减少频率偏差对检测精度的影响。误差分析和实验结果证明了该方法的正确性。
According to the frequency excursion in power systems, this paper proposes a detecting method of harmonic negative current instructions. On the basis of instantaneous reactive power theory and by use of voltage synchronization circuit, the detecting method is studied in terms of the digital signal processing of harmonic negative current instruments. With the Hamming window, the method decreases the effect of frequency excursion on detecting accuracy. The validity of the proposed method is demonstrated by error analyses and experimental results.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第22期60-63,79,共5页
Automation of Electric Power Systems
关键词
谐波
频率偏差
负序电流
数字信号处理
检测
harmonics
frequency excursion
negative current
digital signal process
detection
