摘要
针对目前配电网站线变的隶属关系动态变化的频次高、梳理复杂等问题,研究设计一种基于FM-EEMD信号分解的线变关系识别的方法。该方法利用载波信号在低压侧负载处及其他分支分流比小、本支路变压器中压侧分流比大的特点,通过在0.4kV侧注入一定频率的载波信号,检测中压侧载波信号的相关特性以识别线变关系。通过FM-EEMD方法对中压侧的信号进行经验模态分解,分解得到中压侧载波特定频率的载波信号,通过对该载波信号的分析完成站线变关系的识别。仿真表明该方法可以有效的提取载波信号。
Due to the high frequency change of the membership relationship of the substation-line-transformer,the relationship of the substation-line-transformer is complex.This paper designs a method based on FM-EEMD signal decomposition to identify the line-dependent relationship.The method makes use of the characteristics of the carrier signal,such as small shunt ratio at the low-voltage side load and other branches,and large shunt ratio at the medium-voltage side of the transformer of the correct branch.By injecting a carrier signal of a certain frequency into the 0.4KV side,the strength of the carrier signal at medium-voltage side is detected to identify the substation-line-transformer relationship.In this paper,the signal of the medium voltage side is decomposed by the FM-EEMD method and the line change relationship is identified by analyzing the carrier signal which is obtained by FM-EEMD.Simulation and experiments show that this method can extract carrier signals effectively.
作者
喻旻
余仁山
林志刚
宋志成
Yu Min;Yu Renshan;Lin Zhigang;Song Zhicheng(Yingtan Power Supply Branch of State Grid Jiangxi Power Co.,Ltd.,Yingtan 33500,China)
出处
《华东交通大学学报》
2020年第1期88-93,共6页
Journal of East China Jiaotong University
