电力系统保护与控制2011，Vol.39Issue(10)：42-46,5.
谐波和间谐波三参数识别的SSI-LS方法
A method of three parameters of harmonics and inter-harmonics high accuracy detection based on SSI-LS
摘要
Abstract
In order to detect accurately three parameters of harmonic and inter-harmonic, a method of three parameters of harmonics and inter-harmonic detection based on Stochastic Subspace Identification ( SSI ) and least squares (LS) is proposed. The order of SSI-LS algorithm is tested by use of the singular value difference method, and the actual frequency of each harmonic and inter-harmonic component in the original noisy signal is accurately detected by SSI algorithm, and the method of least squares is applied to estimate the phase and amplitude of the harmonic and inter-harmonics component when SNR is more than 20 dB. So three parameters of inter-harmonics are identified completely. The numerical simulation signals with noise and DC component and the signals with similar frequency and hundredfold-difference amplitude are identified by using three parameters of harmonic and inter harmonic detection.Simulation analysis shows that the method has strong anti-noise ability, high detection accuracy and fast calculation speed, especially has high precision and resolution for the phase of inter-harmonic signal with similar frequency and hundredfold-difference amplitude. It provides a new method for the harmonic precision detection in power system.This work is supported by National Natural Science Foundation of China (No. 50777007).关键词
谐波/间谐波/奇异值差值法/随机子空间/最小二乘法Key words
harmonic: inter-harmonic: singular value difference/ stochastic subspace identification/ least squares分类
信息技术与安全科学引用本文复制引用
李天云,袁明哲,郑波,许洁,于奉振..谐波和间谐波三参数识别的SSI-LS方法[J].电力系统保护与控制,2011,39(10):42-46,5.基金项目
国家自然科学基金项目(No.50777007) （No.50777007）
