基于稳健偏最小二乘法的谐波发射水平估计  

Assessing Harmonic Emission Level Based on Robust Partial Least Squares Regression

作　　者：李湘[1] 陈民铀[1] 郑永伟[2] 程杉[3] 

机构地区：[1]重庆大学电气工程学院输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]四川省电力公司内江电业局,内江641100 [3]三峡大学电气与新能源学院,宜昌443002

出　　处：《电力系统及其自动化学报》2016年第6期86-90,共5页Proceedings of the CSU-EPSA

摘　　要：为了合理划分电力系统及用户各自的谐波污染责任,文中提出用稳健偏最小二乘回归法估算供电系统谐波阻抗并计算用户谐波发射水平。将公共联接点同步测量采样获得的谐波电压和电流信号作为回归方程的自变量与因变量,利用稳健偏最小二乘求解回归系数,即系统侧谐波阻抗。该方法保留了偏最小二乘法在自变量存在相关性的条件下仍然能够回归建模的优点,同时有效克服了偏最小二乘法由于对异常值敏感而导致建模结果不准确的缺陷。通过仿真分析和实际工程算例验证了该方法的准确性和有效性。In order to divide the harmonic pollution liability of power system and users rationally,a novel method to eval-uate harmonic contributions at the point of common coupling（PCC）is presented in this paper.The proposed approachis based on robust partial least squares regression（robust PLS）. As regression coefficients-system harmonic impedanceare estimated based on robust PLS by utilizing the signals of harmonic voltage and current measured synchronously atPCC. Consequently the harmonic emission level of user is calculated. The presented method overcomes the disadvantageof variable dependence in establishing of the system model and reduces or removes the effect of outlying data points.The method was proved to be valid and feasible by the simulation analysis and extensive engineering example.

关 键 词：稳健偏最小二乘回归 异常值 回归系数 系统谐波阻抗 谐波发射水平 

分 类 号：TM744[电气工程—电力系统及自动化]