基于贝叶斯定理的系统谐波阻抗估计-中国电机工程学报.pdf

第36 卷 第11 期 中 国 电 机 工 程 学 报 Vol.36 No.11 Jun. 5, 2016 2016 年6 月5 日 Proceedings of the CSEE ©2016 Chin.Soc.for Elec.Eng. 2935 DOI ：10.13334/j.0258-8013.pcsee.2016.11.009 文章编号：0258-8013 (2016) 11-2935-09 中图分类号：TM 71 基于贝叶斯定理的系统谐波阻抗估计 赵熙，杨洪耕 (四川大学电气信息学院，四川省 成都市 610065) Utility Harmonic Impedance Estimation Based on Bayes Theorem ZHAO Xi ，YANG Honggeng (School of Electrical Engineer Information, Sichuan University, Chengdu 610065, Sichuan Province, China) ABSTRACT: This paper proposed a method to calculate the 分布；信息熵；可信区间；公共耦合点 utility harmonic impedance based on Bayes theorem. Firstly, 0 引言 according to the maximum entropy principle, prior distribution of utility harmonic impedance was a uniform distribution. 随着电力系统的发展，非线性负荷逐渐增多， Secondly, the real probability distribution of utility harmonic 非线性负荷引起的谐波污染问题越来越严重，如何 voltage at the downtime was estimated by kernel density 评估谐波发射水平、区分谐波污染责任亟待解决。 estimation, thus conditional probability of utility harmonic voltage corresponding to the prior impedance was obtained. 评估公共耦合点(point of common coupling，PCC) Thirdly, the posterior distribution was corrected from prior 用户谐波发射水平是谐波污染责任划分的前提，也 distribution by use of conditional probability on the basis of [1-3] 是国内外研究的热点和难点 。 Bayes theorem. Finally, the utility harmonic impedance was 谐波电流在不同电压等级下不具有可比性，通 calculated by minimizing the loss function. The proposed 过分析用户和系统在 PCC 处引起的谐波电压进行 meth