摘要
针对传统行波检测方法中定位不准确、计算量大等问题,提出了一种基于补充总体平均模态分解(complementary ensemble empirical mode decomposition, CEEMD)和改进型Teager能量算子(novel Teager energy operator,NTEO)的行波定位方法。该方法采用CEEMD算法来分解故障行波信号,滤除故障信号中的低频分量。然后采用NTEO能量算子对分解后的信号进行差分运算,增强行波波头的突变特征,实现故障行波波头的精确标定。仿真结果表明,所提方法能够精准地标定故障行波波头,并且有良好的去噪能力。与传统方法相比具有更好的检测效果和更小的定位误差,可以有效地提高配电网行波定位的精确性。
To solve the problems of mode aliasing and large amount of calculation required in the traditional traveling wave detection method,a traveling wave ranging method based on complementary ensemble empirical mode decomposition (CEEMD) and novel Teager energy operator (NTEO) is proposed.In this method,a CEEMD algorithm is used to decompose the fault traveling wave signal and filter out the low-frequency component.Then the NTEO energy operator is used to perform differential operation on the decomposed signal to enhance the mutation characteristics of traveling wave head and realize the accurate calibration of the fault traveling wave head.Simulation results show that the proposed method can accurately calibrate the fault traveling wave head and has good denoising ability.Compared with existing methods,it offers better detection and smaller positioning error,and effectively improves the accuracy of traveling wave location in a distribution network.
作者
白浩
钟振鑫
李巍
曾祥君
潘姝慧
袁智勇
BAI Hao;ZHONG Zhenxin;LI Wei;ZENG Xiangjun;PAN Shuhui;YUAN Zhiyong(Electric Power Research Institute,China Southern Grid,Guangzhou 510663,China;Huizhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Huizhou 516003,China;School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2022年第20期50-59,共10页
Power System Protection and Control
基金
南方电网公司科技项目资助(GDKJXM20198410)
国家重点研发计划项目资助(2017YFB092900)。
关键词
配电线路
双端行波定位
CEEMD
电压行波检测
NTEO
distribution line
double-terminal traveling wave location
CEEMD
voltage traveling wave detection
NTEO
