摘要
为滤除电路中的谐波,需要精确地检测出电路中所含的谐波量。研究了自适应最小均方误差(LMS)谐波电流检测算法。用自适应滤波器取代低通滤波器,解决了谐波检测实时性问题。自适应LMS谐波电流检测算法对电网电压畸变、频率波动等电网参数变化具有良好的自适应调节能力,可运用于三相或单相电路,改变算法中的收敛因子,加快了谐波的检测速度。Matlab仿真结果验证了新算法的精确性和实时性。
To filter out harmonics in a circuit,harmonic components in the circuit should be detected accurately.This paper proposes an adaptive least mean square（LMS）harmonic current detection algorithm.A low-pass filter is replaced with an adaptive filter to solve the problem of real-time harmonic detection.The adaptive LMS harmonic current detection algorithm is used for grid voltage distortion.As frequency fluctuation of power parameters has good adaptive ability,it can be applied to three-phase or single-phase circuits.To change convergence factor of the algorithm,detection speed of harmonic can be accelerated.With MATLAB simulation,accuracy and real-time performance of the proposed algorithm is verified.
出处
《上海电机学院学报》
2017年第1期46-51,共6页
Journal of Shanghai Dianji University
关键词
谐波检测
自适应滤波器
最小均方误差
收敛因子
harmonic detection
self-adapting filter
least mean square
convergence factor
