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Hybrid adaptive filter for full optical current transformer system based on tristate polarization diversity receiver

QING TAO1,2, BOWEN LU1, CHEN HU1, XIN YU1, ZHONGSHENG ZHAI1,2, JIAN CHENG1, DUN LIU1,*

Affiliation

  1. School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China
  2. Hubei Key Laboratory of Modern Manufacturing Quantity Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, Hubei, P.R. China

Abstract

In this paper, a new hybrid adaptive filter for all fiber current transformer system based on tristate polarization diversity receiver is researched. The entire system is a fully polarized system. Based on the optical pulse interference modulation and demodulation, the tristate polarization diversity receiver and hybrid a daptive filter are used to reduce the current ratio errors.It can be seen that in the 60A@50Hz current grade, ratio errors obtained by new method is less nearly 3 times than by traditional scheme. In the 240A@50Hz current grade, ratio errors obtained by new method is less almost 1.4 times than by traditional scheme. In the 1200A@50Hz current grade, ratio errors obtained by new method is less nearly 1.3 times than by traditional scheme. The new method can be best applied to high current sensing system and improve its stability.

Keywords

Polarization diversity receiver, Full optical current transformer, Phase generation carrier, Adaptive variable step size recursive least square method, CL multi wavelet.

Citation

QING TAO, BOWEN LU, CHEN HU, XIN YU, ZHONGSHENG ZHAI, JIAN CHENG, DUN LIU, Hybrid adaptive filter for full optical current transformer system based on tristate polarization diversity receiver, Optoelectronics and Advanced Materials - Rapid Communications, 14, 1-2, January-February 2020, pp.53-60 (2020).

Submitted at: July 31, 2019

Accepted at: Feb. 17, 2020