Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

基于宽带相干信号模型的局放超声波定位研究

来源:电工电气发布时间:2022-10-25 13:25 浏览次数:246

基于宽带相干信号模型的局放超声波定位研究

钱定冬,宋柯,王伟
(华北电力大学 新能源电力系统国家重点实验室,北京 102206)
 
    摘 要:传统算法在实际工程中对相干信号的局部放电(局放)源定位精度一般,分辨率也较低。分析了双局放源到传感器的距离差值与局放超声波信号相关系数的关系,提出了一种针对宽带相干模型局放信号的修正 MUSIC 算法(MMUSIC)与 ISM 相结合的降维 DOA 估计算法,并通过 MATLAB 将两个相干的局放信号和两个不相干的局放信号进行研究对比,证明该算法的有效性。将该算法应用到实验中,结果表明对相干信号和非相干信号的测向误差在9°左右,满足工程实际需要。
    关键词: 局部放电;MUSIC 算法;ISM 算法;超声波定位;宽带相干信号;降维DOA 估计算法
    中图分类号:TM854     文献标识码:A     文章编号:1007-3175(2022)10-0020-06
 
Research on Ultrasonic Location of Partial Discharge Based on
Broadband Coherent Signal Model
 
QIAN Ding-dong, SONG Ke, WANG Wei
(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,
North China Electric Power University, Beijing 102206, China)
 
    Abstract: The traditional algorithm has low accuracy and low res in locating the partial discharge point source of the coherent signal. This paper analyzed the relationship between the distance difference of dual partial discharge sources to the sensor and the related coefficient of the ultrasonic signal of partial discharge. It proposed a dimension reduction DOA estimation algorithm that combined the modified MUSIC algorithm (MMUSIC) and ISM for the partial discharge signal of the broadband coherent model. In addition, this research compared and studied the situation of two coherent partial discharge signals and the situation of two incoherent discharge signals by using MATLAB software.The result showed that this algorithm is effective. This study has applied the algorithm to the experiment. The result shows that the direction-finding error of the coherent signal and the incoherent signal is around 9°, which meets the practical needs of engineering.
    Key words: partial discharge; MUSIC algorithm; ISM algorithm; ultrasonic location; broadband coherent signal; dimension reduction DOA estimation algorithm
 
参考文献
[1] 王赞,郑理威,陈忠贤,等. 基于光纤 EFPI 传感器的 GIS 局部放电研究[J] . 电网与清洁能源,2022,38(2):67-75.
[2] 谢庆,李宁远,律方成,等. 基于信号子空间转换与快速子空间测向算法的局部放电超声阵列信号测向方法[J]. 电网技术, 2011, 35(10):194-198.
[3] 辛晓虎,李继胜,纪海英,等. 用于变压器中局部放电定位的十字形超声阵列传感器研究[J] . 中国电机工程学报,2013,33(21):154-162.
[4] JI Haiying, LUO Yongfen, JI Shengqiang, et al.Simulation of cross-shaped ultrasonic array applied to partial discharge location in oil[J].Przeglad Elektrotechniczny,2012,88(1b):245-249.
[5] LUO Yongfen, XIN Xiaohu, DU Fei, et al.Comparison of DOA algorithms applied to ultrasonic arrays for PD location in oil[J].IEEE Sensors Journal,2015,15(4):2316-2323.
[6] 谢庆,程述一,律方成,等. 采用改进型圆形超声阵列传感器的油中局放定位[J] . 高电压技术,2013,39(5):1054-1060.
[7] 程述一,律方成,谢庆,等. 基于暂态对地电压和超声阵列信号的变压器局放定位方法[J] . 电工技术学报,2012,27(4):255-262.
[8] 李通,谢庆,张宏玮,等. 基于信号稀疏分解的局放超声阵列定位法研究[J] . 仪器仪表学报,2015,36(6):1301-1310.
[9] 王伟, 王赞, 吴延坤,等. 用于油中局部放电检测的 Fabry-Perot 光纤超声传感技术[J]. 高电压技术,2014,40(3):814-821.
[10] 张映月,张春燕,顾进,等. 变压器局放检测光纤超声传感器优化设计与分析[J] . 电网与清洁能源,2017,33(1):71-78.
[11] 叶海峰,钱勇,刘亚东,等. 基于光纤 Bragg 光栅的局放检测技术[J] . 高电压技术,2015,41(1):225-230.
[12] 吕亮,辛晓虎,黄国强,等. 用于油中局部放电定位可重复布置的超声阵列与超高频复合传感器设计[J]. 高电压技术,2014, 40(8):2328-2334.
[13] 罗日成,李卫国,李成榕. 基于阵列信号处理的变压器内局部放电源多目标定位方法[J] . 电网技术,2006,30(1):65-69.
[14] XIE Qing , CHENG Shuyi , LU Fangcheng ,et al.Location of partial discharge in transformer oil using circular array of ultrasonic sensors[J].IEEE Transactions on Dielectrics and Electrical Insulation, 2013,20(5):1683-1690.
[15] 辛晓虎,罗勇芬,杜非,等. 用于油中局部放电定位的超声波接收阵列的定向算法比较[J] . 中国电机工程学报,2015,35(20):5351-5359.
[16] 王永良,陈辉,彭应宁,等. 空间谱估计理论与算法[M]. 北京:清华大学出版社,2004.
[17] 何子述,黄振兴,向敬成. 修正 MUSIC 算法对相关信号源的 DOA 估计性能[J] . 通信学报,2000,21(10):14-17.
[18] 刘云,李志舜. 基于修正 MUSIC 算法的宽带相干源波达方向估计[J] . 西北工业大学学报,2003,21(4):457-460.