强电磁环境下电子变压器局放信号抗干扰研究

强电磁环境下,当前电子变压器局放信号抗干扰方法大都采用数字陷波器法,适应性和稳定性较差。为此,提出一种新的电子变压器局放信号抗干扰方法。首先构造电子变压器局放脉冲,分析压缩感知理论,由此提出电子变压器局放信号存在的问题,然后以能量输出最小化为原则设计滤波器,求解压缩域投影加权向量,利用自适应方法抵抗非期望信号(电磁信号与高斯白噪声信号的投影干扰),使投影滤波器输出的干扰最小,接近期望输出,实现抗干扰处理强电磁环境下电子变压器局放信号。实验结果表明,所提方法具有很高的抗干扰性能。

Discharge signal anti-jamming strong electronic transformer electromagnetic environment research

Under the strong electromagnetic environment, the digital trap method is adopted in the current electronic transformer PD signal anti-jamming method, but the adaptability and stability are poor. To this end, a new method of anti interference of electronic transformer PD signal is proposed. The structure of electronic transformer partial discharge pulse, analysis of compressed sensing theory, the electronic transformer PD signal problems, then the output energy minimization principle for the design of filters, decompressing domain projection weighted vector, using adaptive methods against non expected signal (projection of electromagnetic interference signal and the Gauss white noise signal, the interference) the output projection filter is minimum, close to the expected output, realize the anti interference electronic transformer under strong electromagnetic environment discharge signal processing. The experimental results show that the proposed method has high anti jamming performance.