摘要
当电力系统中存在密集谐波/间谐波时,现有谐波/间谐波参数估计方法往往因计算模型阶数难以选取或部分频谱泄漏干扰被忽略等因素而产生严重误差。由此,提出一种基于频谱泄漏干扰多层消除的密集谐波/间谐波参数估计方法。根据干扰来源,将频谱泄漏干扰分为自频谱泄漏干扰和互频谱泄漏干扰;提出频谱旋转线性化和多层频谱错位相减方法以有效抑制互频谱泄漏干扰;构建自频谱泄漏干扰模型并采用自适应步长牛顿迭代法求解模型,从而有效抑制自频谱泄漏干扰并求得密集谐波/间谐波参数。相较于现有方法,所提方法无需任何先验条件,且能在主瓣重叠时有效抑制频谱泄漏干扰,从而精准估计密集谐波/间谐波参数。仿真和实验验证了所提方法的有效性与准确性。
The existing harmonics/interharmonics estimation methods produce significant errors due to fac⁃tors such as the difficulty in selecting the proper order of calculation model or neglecting partial spectrum leakage interference when the dense harmonics/interharmonics exist in electric power system.Aiming at this problem,a dense harmonics/interharmonics parameter estimation method based on multilayer elimina⁃tion of spectrum leakage interference is proposed.According to the source of interference,the spectrum leakage interference is classified into self-spectrum leakage interference and cross-spectrum leakage interference.Then,the spectral rotation linearization and multilayer spectrum subtraction methods are proposed to effectively suppress the cross-spectrum leakage interference.The self-spectrum leakage interference model is built,and the adaptive step Newton iterative algorithm is used to solve the model to eliminate self-spectrum leakage interference and obtain dense harmonics/interharmonics parameters.Compared with the existing methods,the proposed method does not require any prior conditions and can effectively suppress various spectrum leakage interferences when the main lobe overlaps,thus accurately estimating the dense harmonics/interharmonics parameter.Simulation and experiment verify the effectiveness and accuracy of the proposed method.
作者
徐方维
周全
王川
郭凯
郑鸿儒
罗忠游
舒勤
XU Fangwei;ZHOU Quan;WANG Chuan;GUO Kai;ZHENG Hongru;LUO Zhongyou;SHU Qin(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2024年第11期178-186,共9页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(52277113)
四川省自然科学基金资助项目(2023NSFSC0299)。
关键词
密集谐波/间谐波
主瓣重叠
自频谱泄漏干扰
互频谱泄漏干扰
自适应步长牛顿迭代
dense harmonics/interharmonics
main lobe overlap
self-spectrum leakage interference
crossspectral leakage interference
adaptive step Newton iteration
