高压开关柜局部放电监测白噪声抑制仿真研究  

Simulation of White Noise Suppression in Partial Discharge Monitoring of High Voltage Switchgear

作　　者：李宝强 刘乃鹏 Li Bao-qiang;LIU Nai-peng(CHN Energy Longyuan Power Group Corporation Limited,Beijing 100034,China;Heilongjiang University of Science and Technology,Harbin Heilongjiang 150020,China)

机构地区：[1]国家能源集团龙源电力集团股份有限公司,北京100034 [2]黑龙江科技大学,黑龙江哈尔滨150020

出　　处：《计算机仿真》2024年第8期105-110,共6页Computer Simulation

摘　　要：高压开关柜局部放电信号波极易受白噪声影响,为抑制信号波中的白噪声,提高信号检出率,提出一种基于ASTSVD信号分解算法与AWM信号处理相结合的降噪方法,分别先后对污染波进行降噪处理,构建了ASVD-PD白噪声抑制模型。模型首先采用模型融合的方法,将金属尖端缺陷局部放电信号波即HVSPD波模型与wiener-khintchin白噪声模型有机融合,构建出HVSPD污染波;然后采用AWM算法中的SHF提取与修正模块,统计HVSPD污染波的局部变化量,从而优化污染波形结构,提高模型计算效率;接着采用Hankel Matrix矩阵将HVSPD污染波分解为噪声分量和信号分量,并采用中值函数消除噪声分量数据;最终利用EA算法对放大因子与奇异阈值进行参数寻优,提高模型的搜索能力。不同强度噪声干扰的污染波去噪仿真结果表明,较其它传统去噪算法相比,文中提醒胡的算法去噪性能有显著提升:NRR指标提升了57.64%,MSE指标降低了12.96%,且NCC和SNR指标均为最高值。综上所述,文中构建的ASVD-PD白噪声抑制模型有效的提高了HVSPD污染波的白噪声干扰,提高原始波的保有率,并降低其畸变率。The partial discharge(PD)signal of high-voltage switchgear is easily affected by white noise.In order to suppress the white noise in the signal wave and improve the signal detection rate,a denoising method based on the combination of the ASTSVD signal decomposition algorithm and AWM signal processing is proposed.The pollution wave is denoised successively,and the ASVD-PD white noise suppression model is constructed.In this model,the metal tip defect partial discharge wave(HVSPD wave model)and the wiener-khintchin white noise model are fused to construct the HVSPD pollution wave.Then,the SHF extraction and correction module in the AWM algorithm is used to count the local variation of the HVSPD contaminated wave,so as to optimize the structure of the contaminated wave and improve the calculation efficiency of the model.Finally,the EA algorithm is used to optimize the parameters of the amplification factor and the singular threshold to improve the searchability of the model.Simulation results show that compared with other traditional denoising algorithms,the denoising performance of Hu's algorithm is significantly improved:the NRR index is increased by 57.64%,the MSE index is reduced by 12.96%,and the NCC and SNR indexes are the highest.To sum up,the ASVD-PD white noise suppression model constructed in this paper effectively improves the white noise interference of the HVSPD contaminated wave,improves the retention rate of the original wave,and reduces its distortion rate.

关 键 词：白噪声抑制 信号分解 信号处理 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]