Covered ice motion feature extraction for transmission lines based on inertial measurement
YANG Jinxian1,CHAO Lijun1,LI Shuanglei2
1. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;
2. State Grid Shandong Provincial Linqu County Electric Power Supply Company,Linqu 262600,China
Abstract:In order to identify covered ice motions and their features of transmission lines and perform effective damping control,a multi-dimensional time series feature extraction method based on the micro inertial measurement system (MIMS) was proposed. Firstly,a MIMS measurement node was designed to collect original signals of tri-axial accelerations and angular velocities of transmission lines during transmission lines moving. Original signals were pre-processed to establish a multi-dimensional time-varying measurement matrix. Then,the singular value decomposition was done for the correlation coefficient matrix to calculate the weighted feature matrix taken as recognition features of transmission lines’ motion amplitude and frequency. The covered ice motions were recognized using the near neighbor classification method,and variation levels for amplitude and frequency of iced conductors were estimated with correlation analysis. Finally,an analog test system was constructed for transmission lines’ covered ice motions,and MIMS signals of different motion forms were collected and processed according to the proposed algorithm. Features of covered ice’s 3 motion forms were compared. The test results showed that the proposed algorithm can be used to recognize transmission lines’ covered ice motions and estimate their amplitude and frequency,it can provide parameters for design of motion damping controller of transmission lines.
杨金显1,晁丽君1,李双磊2. 基于惯性测量的输电导线覆冰运动特征提取[J]. 振动与冲击, 2019, 38(7): 172-178.
YANG Jinxian1,CHAO Lijun1,LI Shuanglei2. Covered ice motion feature extraction for transmission lines based on inertial measurement. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(7): 172-178.
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