基于PLS等价权回归的系统谐波阻抗计算  

System harmonic impedance calculation based on partial least squares equivalent weight regression

作　　者：钱永亮 唐明淑 陈波 郭成 冯跃 QIAN Yongiang;TANG Mingshu;CHEN Bo;GUO Cheng;FENG Yue(Wenshan Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Wenshan,Yunnan 663099,China;Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]云南电网有限责任公司文山供电局,云南文山663099 [2]昆明理工大学电力工程学院,昆明650500

出　　处：《浙江电力》2024年第1期28-35,共8页Zhejiang Electric Power

基　　金：云南电网有限责任公司科技项目(YNKJXM20220071)。

摘　　要：为了降低电压、电流信号中奇异值对回归结果的影响,准确划分系统及用户各自的谐波责任,提出一种基于PLS(偏最小二乘法)等价权回归的系统谐波阻抗计算方法。利用公共连接点的谐波电压和谐波电流数据,得到含有待求量信息的回归方程,用PLS求解回归系数,回归系数对应系统侧谐波阻抗及谐波电压。将回归系数作为等价权迭代初值,再依据等价权迭代计算结果,最终推导出用户谐波发射水平。该方法克服了以最小二乘解作为迭代初值计算方法的缺点,提高了用户谐波发射水平计算精度,通过算例仿真分析验证了所提方法的准确性。To mitigate the impact of singular values in voltage and current signals on regression results and achieve a more accurate delineation of harmonic responsibilities for both the system and users,this paper proposes a method for calculating system harmonic impedance based on partial least squares(PLS)equivalent weight regression.Utiliz⁃ing harmonic voltage and current data from common connection points,the paper formulates a regression equation containing the sought-after parameters.The PLS is then employed to determine regression coefficients,which corre⁃spond to the harmonic impedance and harmonic voltage on the system side.These coefficients are used as initial val⁃ues for iterative equivalent weight calculations.Then,the user’s harmonic emission level is deduced based on the it⁃erative results.This approach overcomes the drawbacks of using the least squares solution as an initial value for it⁃erative calculations,enhancing the precision of user’s harmonic emission level calculations.The accuracy of the proposed method is validated through simulation analysis in case studies.

关 键 词：偏最小二乘法 谐波阻抗 谐波发射水平 等价权回归 

分 类 号：TM935[电气工程—电力电子与电力传动]