电测与仪表2017，Vol.54Issue(12)：122-128,7.
基于改进UPF滤波算法的稳态及短路电流下光学电流互感器信噪分离研究
Research on signal-noise separation of optical fiber current transformer for the steady and transient states based on the improved UPF algorithm
摘要
Abstract
Now,the rapid development of ultra high voltage grid has been carried out in China,and higher requirements on the measurement precision and speed of the current transformer are put forward.When the input current signal to noise ratio is extremely low,the optical current transformer (OCT) is difficult to filter from the point of view of frequency domain.So the unscented trace particle filter (UPF) is put forward to improve the signal-noise separation ability of OCT,and in view of the poor real-time performance of large conventional UPF computation problems,the improved UPF filtering based on global sampling is put forward to improve the real-time filtering.Then,the effect of this filtering under the condition of the three-phase short-circuit power system is discussed,further improved UPF by using residual error as threshold to calculate is put forward.Finally,the Matlab simulation results show that the improved UPF method based on global sampling off the ac/dc component effectively improves the output SNR and filtering accuracy,and even on the short circuit conditions,it also can achieve the rapid and accurate filtering,and provide current for relay protection device.关键词
无迹粒子滤波/光学电流互感器/输出信噪比/法拉第效应/全局采样Key words
unscented particle filtering/optical current transducers/output signal to noise ratio/Faraday magneto-optic effect/global sample分类
信息技术与安全科学引用本文复制引用
欧阳进,张蓝宇,黄阳岗,严宇恒,李岩松..基于改进UPF滤波算法的稳态及短路电流下光学电流互感器信噪分离研究[J].电测与仪表,2017,54(12):122-128,7.基金项目
国家自然科学基金资助项目(51277066) （51277066）
